Price of pneumatic ash suction machine for ore powder

1. Bucket elevator is the most common vertical conveying equipment, which is the most effective way to lift granular material and powder material. It is mainly composed of machine head, machine barrel, machine base, stpan belt, stpan, transmission mechanism and tensioning device. According to the need, it can also be equipped with anti reverse, explosion-proof, speed sensor and deviation monitor and other protection devices
the advantages of bucket elevator are that it can transport materials in the vertical direction, so the floor space is very small and the floor space is significantly saved; It can work in a fully enclosed enclosure without st; Its energy consumption is only 1 / 10 ~ 1 / 5 of that of pneumatic conveying. Its main disadvantage is that the type of conveying materials is limited, and it is only suitable for bulk and fragment materials; Overload sensitivity, must feed evenly to prevent blocking.

2. In order not to affect the environment,
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3. It's very simple... Because calcium sulfite (SO3) composed of sulfite is unstable, it will decompose into SO2 + Cao once it cools down. So we need to transform it into stable calcium sulfate composed of sulfite.

4. Dry desulfurization: mainly circulating fluidized bed reactor desulfurization. After limestone is added into CFB boiler, two high temperature gas-solid reactions will occur: combustion decomposition reaction and sulfur salinization reaction
wet process: Limestone / lime gypsum wet process: the boiler flue gas is pressurized by booster fan, and then enters the desulfurization tower after heat exchange and cooling through gas-gas heat exchanger. It flows through the desulfurization tower from bottom to top, forming a reverse flow with the limestone / lime slurry from top to bottom. At the same time, heat exchange and chemical reaction occur to remove SO2 in the flue gas. After purification, the liquid droplets in the flue gas are removed by the mist eliminator and discharged from the chimney after being heated by the gas-gas heat exchanger. The reaction proct CaSO3 enters the slurry pool at the bottom of the desulfurization tower and is forced to oxidize by the air blown in by the aerator to generate CaSO4 and then gypsum. In order to maintain a certain concentration of calcium sulfate in the slurry tank, the gypsum generated needs to be continuously discharged, fresh limestone / lime slurry needs to be continuously supplemented, and gypsum slurry with high purity can be obtained after dehydration
semi dry process: spray drying flue gas desulfurization and circulating fluidized bed flue gas desulfurization (or semi dry process, finally postprocessing different). After crushing, lime was digested in the digester and mixed with desulphurized by-procts and some coal ash to form a mixed slurry. The slurry was boosted into a rotary atomizer through slurry pump and dispersed evenly in the tower after atomization. The hot flue gas enters the flue gas distributor tangentially from the top of the tower and flows down with the droplets. The chemical reaction takes place ring the evaporation and drying of the droplets to absorb SO2 in the flue gas.

5. Desulfurization uses calcium based methods to fix the sulfur element in coal into a solid to prevent the generation of SO2 ring combustion
1 desulfurization technology
based on the analysis and research of domestic and foreign desulfurization technology and domestic power instry's introction of desulfurization process pilot plants, the current desulfurization methods can be generally divided into three categories: desulfurization before combustion, desulfurization ring combustion and desulfurization after combustion< In FGD technology, according to the type of desulfurizer, it can be divided into the following five methods: calcium method based on CaCO3 (limestone), magnesium method based on MgO, sodium method based on Na2SO3, ammonia method based on NH3 and organic alkali method based on organic alkali. Calcium method is widely used in the world, accounting for more than 90%. According to the dry and wet state of absorbent and desulfurization procts in desulfurization process, desulfurization technology can be divided into wet method, dry method and semi dry (semi wet) method. Wet FGD technology uses solution or slurry containing absorbent to desulfurize and treat desulfurization procts in wet state. This method has the advantages of fast desulfurization reaction, simple equipment and high desulfurization efficiency. However, there are many problems, such as serious corrosion, high operation and maintenance cost and easy to cause secondary pollution. The desulfurization absorption and proct treatment of dry FGD technology are carried out in dry state. This method has the advantages of no sewage and waste acid discharge, less equipment corrosion, no obvious cooling of flue gas in the purification process, high temperature of flue gas after purification, concive to chimney exhaust diffusion, less secondary pollution and so on. However, it has the problems of low desulfurization efficiency, slow reaction speed, large equipment and so on. Semi dry FGD technology refers to the desulphurization agent in the dry state desulfurization, in the wet state regeneration (such as washing activated carbon regeneration process), or in wet state desulfurization, dry treatment of desulfurization procts (such as spray drying method) flue gas desulfurization technology. In particular, the semi dry process of desulfurization in wet state and treatment of desulfurization procts in dry state has been widely concerned for its advantages of fast reaction speed and high desulfurization efficiency in wet process, no waste water and acid discharge in dry process and easy treatment of desulfurization procts. According to the use of desulfurization procts, it can be divided into two methods: discard method and recovery method< (1) limestone gypsum flue gas desulfurization process
limestone gypsum flue gas desulfurization process is the most widely used desulfurization technology in the world. About 90% of the flue gas desulfurization devices used in thermal power plants in Japan, Germany and the United States use this process
its working principle is as follows: limestone powder is made into slurry by adding water as absorbent and pumped into the absorption tower to fully contact and mix with flue gas. Sulfur dioxide in flue gas reacts with calcium carbonate in slurry and air blown from the lower part of tower to proce calcium sulfate. After calcium sulfate reaches a certain saturation, gypsum dihydrate is formed by crystallization. The gypsum slurry discharged from the absorption tower is concentrated and dehydrated to make its water content less than 10%, and then sent to the gypsum storage bin for stacking by conveyor. The desulfurized flue gas is removed by mist eliminator, heated by heat exchanger and discharged into the atmosphere by chimney. Because the absorbent slurry in the absorption tower contacts with the flue gas repeatedly through the circulating pump, the utilization rate of absorbent is very high, the calcium sulfur ratio is low, and the desulfurization efficiency can be more than 95%
(2) rotary spray drying flue gas desulphurization process
spray drying process desulfurization process using lime as desulfurizing absorbent, lime digestion and adding water to make lime cream, and lime cream from the pump into the absorption tower atomization device, in the absorber, atomized into small droplets of the absorbent mixed with the flue gas, and chemical reaction with SO2 in flue gas to generate CaSO3. SO2 in flue gas is removed. At the same time, the moisture brought in by the absorbent is evaporated and dried rapidly, and the flue gas temperature decreases accordingly. Desulfurization reaction procts and unused absorbent are carried out of the absorption tower with the flue gas in the form of dry particles and are collected in the st collector. The flue gas after desulfurization is discharged after st removal by st collector. In order to improve the utilization rate of desulfurization absorbent, part of the st collector collection is generally added to the pulping system for recycling. The process has two different atomization options, one is rotary spray wheel atomization, the other is gas-liquid two-phase flow.
spray drying process has the characteristics of mature technology, simple process and high reliability. The desulfurization rate can reach more than 85%. The process has a certain application range (8%) in the United States and some Western European countries. Desulfurized ash can be used for brick making and road construction, but most of them are discarded to ash yard or backfilled in abandoned mines< (3) ammonium phosphate fertilizer flue gas desulfurization process
ammonium phosphate fertilizer flue gas desulfurization technology belongs to the recovery method, named for its by-proct ammonium phosphate. The process is mainly composed of adsorption (desulfurization of activated carbon to proce acid), extraction (decomposition of phosphate rock with dilute sulfuric acid to extract phosphoric acid), neutralization (preparation of ammonium phosphate Neutralization Solution), absorption (desulfurization of ammonium phosphate solution to proce fertilizer), oxidation (oxidation of ammonium sulfite), concentration and drying (preparation of solid fertilizer), etc. It is divided into two systems:
flue gas desulfurization system: the flue gas passes through a high-efficiency st collector to make the st content less than 200mg / Nm3, the flue gas pressure is raised to 7000pa by a fan, the temperature and humidity are cooled and regulated by water spraying through venturi tube, and then the flue gas enters into a group of four parallel activated carbon desulfurization towers (one of which is periodically switched for regeneration) to control the primary desulfurization rate to be greater than or equal to 70%, After the first stage desulfurization, the flue gas enters the second stage desulfurization tower and is washed with ammonium phosphate slurry for desulfurization. The purified flue gas is discharged after separation of mist
fertilizer preparation system: in a conventional single tank multi slurry extraction tank, dilute sulfuric acid prepared by the same desulfurization process decomposes phosphate rock powder (P2O5 content is more than 26%), filters to obtain dilute phosphoric acid (its concentration is more than 10%), neutralizes with ammonia to proce phosphorus ammonia, which is used as a secondary desulfurizer. The slurry after secondary desulfurization is concentrated and dried to proce ammonium phosphate compound fertilizer
(4) flue gas desulfurization process by injecting calcium into the furnace and humidifying the tail gas
activation desulfurization process by injecting calcium into the furnace and humidifying the tail gas is based on the process of injecting calcium into the furnace and adding a humidifying section at the tail of the boiler to improve the desulfurization efficiency. In this process, limestone powder is mostly used as absorbent. Limestone powder is injected into 850 ~ 1150 ℃ temperature zone of furnace by pneumatic injection. Limestone is decomposed into calcium oxide and carbon dioxide by heating. Calcium oxide reacts with sulfur dioxide in flue gas to form calcium sulfite. Due to the influence of mass transfer process, the reaction speed is slow and the utilization rate of absorbent is low. In the tail humidifying activation reactor, humidifying water is sprayed into the reactor in the form of mist, which contacts with unreacted calcium oxide to form calcium hydroxide, and then reacts with sulfur dioxide in flue gas. When the Ca / S ratio is controlled at 2.0 ~ 2.5, the desulfurization rate of the system can reach 65 ~ 80%. Due to the addition of humidifying water, the temperature of flue gas at the outlet is generally controlled to be 10 ~ 15 ℃ higher than the dew point temperature. Humidifying water is evaporated rapidly e to the heating of flue gas temperature. Unreacted absorbent and reaction procts are discharged with flue gas in dry state and collected by st collector
the desulfurization process has been applied in Finland, the United States, Canada, France and other countries, and the maximum unit capacity of the desulfurization technology has reached 300000 kW< (5) flue gas circulating fluidized bed desulfurization process
flue gas circulating fluidized bed desulfurization process consists of absorbent preparation, absorption tower, desulfurization ash recycling, st collector and control system. In this process, dry hydrated lime powder is generally used as absorbent, and other dry powder or slurry with absorption capacity for sulfur dioxide can also be used as absorbent
the untreated flue gas discharged from the boiler enters from the bottom of the absorption tower (i.e. fluidized bed). There is a venturi device at the bottom of the absorption tower. After the flue gas flows through the venturi tube, the speed is accelerated, and it is mixed with very fine absorbent powder. There is fierce friction between particles and between gas particles, forming a fluidized bed. Under the condition of spraying uniform water mist to rece the flue gas temperature, the absorbent reacts with sulfur dioxide in the flue gas to proce CaSO3 and CaSO4. After desulfurization, the flue gas carrying a large number of solid particles is discharged from the top of the absorption tower and enters the recycling st collector. The separated particles return to the absorption tower through the middle ash bin. As the solid particles are recycled for as many as 100 times, the utilization rate of the absorbent is high
the by-proct proced by this process is dry powder, and its chemical composition is similar to that of spray drying process. It is mainly composed of fly ash, CaSO3, CaSO4 and unfinished absorbent Ca (OH) 2, which is suitable for abandoned mine backfill, road foundation and so on.
in a typical flue gas circulating fluidized bed desulfurization process, when the sulfur content of coal is about 2% and the Ca / S ratio is not more than 1.3, the desulfurization rate can reach more than 90% and the flue gas temperature is about 70 ℃. At present, this technology is used in 100 ~ 200 MW units abroad. Because of its small area and less investment, it is especially suitable for flue gas desulfurization of old units
(6) seawater desulfurization process
seawater desulfurization process is a desulfurization method to remove sulfur dioxide from flue gas by using the alkalinity of seawater. In the desulfurization absorption tower, a large amount of seawater is sprayed to wash the coal-fired flue gas entering the absorption tower. The sulfur dioxide in the flue gas is absorbed by seawater and removed. The purified flue gas is demisted by demister and heated by flue gas heat exchanger and then discharged. The seawater after absorbing sulfur dioxide is mixed with a large amount of seawater without desulfurization. After aeration in the aeration tank, SO32 - is oxidized into stable SO42 -, and the pH value and COD of seawater are adjusted to meet the discharge standard before being discharged into the sea. The seawater desulfurization process is generally applicable to the power plants which are close to the sea, have good diffusion conditions, use seawater as cooling water and burn low sulfur coal. Seawater desulfurization process is widely used in flue gas desulfurization of aluminum smelters, refineries and other instrial furnaces in Norway. More than 20 sets of desulfurization devices have been put into operation. In recent years, the application of seawater desulfurization technology in power plants has made rapid progress. The biggest problem of this process is the possible deposition of heavy metals and the impact on the marine environment after flue gas desulfurization, which requires long-time observation to draw a conclusion. Therefore, it should be carefully considered in areas with more sensitive environmental quality and higher environmental protection requirements
(7) electron beam desulfurization process
the process consists of pre desting of flue gas, cooling of flue gas, ammonia charging, electron beam irradiation and by-proct capture. The flue gas discharged from the boiler enters the cooling tower after rough filtering treatment by the st collector, and the cooling water is sprayed in the cooling tower to cool the flue gas to a temperature suitable for desulfurization and denitration treatment (about 70 ℃). The dew point of the flue gas is usually about 50 ℃, and the spray cooling water is completely evaporated in the cooling tower, so no waste water is proced. After passing through the cooling tower, the flue gas flows into the reactor, and a certain amount of ammonia, compressed air and soft water are mixed and injected at the inlet of the reactor. The amount of ammonia added depends on the concentration of Sox and NOx. After electron beam irradiation, Sox and NOx generate intermediate procts sulfuric acid (H2SO4) and nitric acid (HNO3) under the action of free radicals. Then sulfuric acid and nitric acid react with coexisting ammonia to form powdery particles (mixed powder of ammonium sulfate (NH4) 2SO4 and ammonium nitrate NH4NO3). Some of these powder particles are precipitated to the bottom of the reactor and discharged through the conveyor. The rest are separated and captured by the by-proct st collector, and then sent to the by-proct warehouse for storage after granulation treatment. The purified flue gas is desulfurized

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7. Belongs to a category of lifting machinery: loading bridge
generally, they are divided into port cranes!

8. First, the suction of the ash extractor is not enough. First of all, the power of its motor (motor) should be considered. It's like asking a child to carry something that an alt can afford. If you don't have enough strength, how can you suck it out
secondly, we will consider whether the design of the pipe of the ash extractor is unreasonable. If the pipe is too small, the dredging effect will not be very good
thirdly, it depends on whether the outlet of the ash extractor is blocked and whether it is downwind.