Aerated concrete block production line project on the environmental hazards and solutions
October 27, 2021
Aerated concrete block production line project itself is environmentally friendly and efficient technology and innovation of an industrial economy; but also has a certain impact on the social environment as long as the relative adjustment is done is to meet the indicators.
As the annual output of 200,000 cubic meters of aerated concrete block production line, then the boiler room annual coal consumption of 18020t, the amount of flue gas generated about 216.24 million m3 / a, the amount of pollutants generated for soot 428.2t / a, SO2199.3t / a, the generated concentration of soot 1980mg/m3SO2921.5mg/m3, the boiler is equipped with hemp stone water bath dust collector ( Dust removal efficiency ≥ 95%, desulfurization efficiency ≥ 30%) after dust removal, boiler flue gas pollutant emissions are soot 21.4t/a, SO2 139.5t/a, emission concentration soot: 99mg/m3, SO2: 645mg/m3, and finally discharged through a 40m high chimney. After the above adjustment of the emission index will definitely not affect the local crops, residents living conditions.
Secondly, dust: the dust emission point of autoclaved brick production line is one more than that of aerated concrete production line, which is the top of the warehouse of finely ground fly ash cylinder and the top of the elevator. The dust is mainly generated in the process of raw material inlet and outlet, grinding and batching, and the emission of dusty waste gas from the two lines is 416.79 million m3. The raw materials that generate dust are mainly fly ash, cement, quicklime, desulfurization gypsum, etc., and the main ingredients are SiO2 and CaO, etc. The main emission points are as follows
a) The dust concentration of 18g/m3 at the top of the lime store and the top of the hoist, and the emission concentration is 30mg/m3 after setting a HMC-64 pulse single bag dust collector for treatment.
b) Ball mill, mill elevator, batching hopper of batching building, dust concentration of 18g/m3, set a LPM4A-120 air shock bag dust collector after treatment, the emission concentration is 30mg/m3.
c) Cement warehouse top, elevator top, dust concentration 15g/m3, set a HMC-64 pulse single bag dust collector after treatment, the emission concentration is 25mg/m3.
d) Fly ash storage roof, hoist roof, dust concentration 15g/m3, set a LPM4A-120 air shock bag dust collector after treatment, the emission concentration is 25mg/m3.
e) Top of desulfurization gypsum storage, top of elevator, dust concentration 18g/m3, after setting a HMC-64 pulse single bag dust collector, the emission concentration is 30mg/m3.
f) The dust concentration is 15g/m3 at the top of the fine fly ash cylinder warehouse and the top of the elevator, and the emission concentration is 25mg/m3 after setting a HMC-64 pulse single bag dust collector. After the above measures, we can reduce the impact of dust on the local area, and even make relative contribution to the local agriculture.
Aerated concrete block production line treatment of dust emissions program: the production plant raw materials for fly ash, cement, lime and gypsum, these raw materials in the treatment and storage and transportation process will produce a certain amount of dust, in which we have all developed effective treatment measures. In the batching section, the design sets up bag dust collectors on various powder material bins, so that the dust in the batching bins will not spill out and cause pollution to the environment. The finished product yard is equipped with spraying water pipe, which can be sprayed at any time to make the yard clean and dust-free.
The solution of aerated concrete block production line to control wastewater: the main drainage is equipment and ground washing water, condensate of autoclave and domestic sewage, etc. The condensate of autoclave and equipment and ground washing water contain a small amount of production raw material particles, which are treated by sedimentation tank, and manure sewage is treated by septic tank. Only a small amount of domestic sewage is discharged into the plant drainage system through the drainage pipe, and the quality of the drainage water can be controlled within the discharge standard.
