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Energy-saving soot and dust purification method and device thereof

A smoke-dust purification and energy-saving technology, applied in chemical instruments and methods, separation methods, chemical industry, etc., can solve the problems of unfavorable smoke and dust solid waste recycling, low dust removal efficiency, unsatisfactory effect, etc., to achieve recycling and reuse , save energy, improve the effect of concentration

Active Publication Date: 2019-08-30
ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In production, a bag filter is usually used to collect copper-phosphorus alloy smelting dust, but P 2 o 5 Easy to absorb moisture, bond carbon black to form a viscous substance, adhere to the inner wall of the smoke pipeline and the filter bag, block the filter bag, the dust removal efficiency is low, and it is not conducive to the recovery and treatment of smoke and solid waste
At room temperature, P 2 o 5 The solubility in water is very low, and the water dust removal equipment commonly used in the foundry industry is not ideal for the treatment of copper-phosphorus alloy smelting dust.

Method used

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  • Energy-saving soot and dust purification method and device thereof
  • Energy-saving soot and dust purification method and device thereof
  • Energy-saving soot and dust purification method and device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] According to the accompanying drawings, it can be seen that an energy-saving dust purification device includes a dust removal device and a heating device, and the dust removal device includes an absorption tower 16, a circulation pump 1, a gas-liquid separation device 3 and a mist removal device 4. The input end of the circulation pump 1 is communicated with the absorption tower 16 through the connecting pipe I101, and the output end of the circulation pump 1 is communicated with the spray head 5 arranged in the absorption tower 16 through the spray pipe 2. The pump head spray pipe 2, the spray head 5, the return spray head 7, the control valve I11, and the absorption tower 13 are all stainless steel with high temperature resistance, acid and alkali resistance, and corrosion resistance. The gas-liquid separation device 3 and the demister The device 4 is sequentially arranged above the absorption tower 16 from bottom to top; the gas-liquid separation device 3 is a gas-liq...

Embodiment 2

[0041] The temperature of the circulating spray liquid is 80°C, the mesh size of the steel wire mesh of the split cover I6 and split cover II601 is 100 mesh, the copper-phosphorus alloy is smelted in 50 furnaces, and the total amount of phosphorus input is 1175kg. After the copper-phosphorus alloy smelting flue gas passes through the absorption tower in the method of the present invention, 507.7kg of phosphoric acid with a concentration of 68% is obtained. The obtained phosphoric acid is heated to 80°C in the pickling tank and can be used for pickling 5000kg of extruded copper-phosphorus alloy. Through chemical analysis test, the phosphorus content in the brazing filler metal ingot is 1052.5kg, and the phosphorus content in the slag is 13kg, and the phosphorus content in the flue dust of theoretical analysis should be 109.5kg, and the phosphorus content that the inventive method recycles is 109.2kg, The recycling rate reaches 99.7%.

Embodiment 3

[0043] The temperature of the circulating spray liquid is 85°C, the mesh size of the steel wire mesh of the split cover I6 and split cover II601 is 100 mesh, the copper-phosphorus alloy is smelted in 50 furnaces, and the total amount of phosphorus input is 1175kg. After the copper-phosphorus alloy smelting flue gas passes through the absorption tower in the method of the present invention, 529.3kg of phosphoric acid with a concentration of 62% is obtained. The obtained phosphoric acid is heated to 80°C in the pickling tank and can be used for pickling 5000kg of extruded copper-phosphorus alloy. Through chemical analysis test, the phosphorus content in the solder ingot is 1056.7kg, the phosphorus content in the molten slag is 14.2kg, the phosphorus content in the theoretical analysis smoke should be 104.1kg, the phosphorus content that the inventive method recycles is 103.8kg , The recycling rate reaches 99.7%.

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Abstract

The invention discloses an energy-saving soot and dust purification method and a device thereof. The soot and dust purification device comprises a dust removal device and a heating device; the dust removal device comprises an absorption tower, a circulating pump, a gas-liquid separation device and a demister, the absorption tower is internally provided with a spray mechanism, an evaporation mechanism and an electrical heating pipe I, wherein the spray mechanism comprises a plurality of segmentation masks I and segmentation masks II; the evaporation mechanism comprises a plurality of heat-conducting plates and a plurality of rows of heating assemblies, the heating assemblies comprise an electrical heating pipe II, an electrical heating pipe III, and an electrical heating pipe IV; the heating device comprises a return pipe and a tubular heat exchanger, the air inlet end of the tubular heat exchanger is provided with an axial flow fan, the air outlet end of the tubular heat exchanger is communicated with the absorption tower, one end of the return pipe is communicated with a feed port in the top end of the tubular heat exchanger, and the other end of the return pipe is communicated with a discharging port of the segmentation mask II at the most bottom. According to the energy-saving soot and dust purification method and device, the concentration of by-product phosphoric acid is continually improved by adopting a circulating absorption manner, and the recycling and reusing of the by-product are facilitated.

Description

technical field [0001] The invention relates to the technical field of dust purification during copper-phosphorus alloy smelting, in particular to an energy-saving dust purification method and a device thereof. Background technique [0002] During the smelting process of copper-phosphorus alloy, a large amount of smoke and dust are produced, and the main components of the smoke and dust are P 2 o 5 . P 2 o 5 When contacted with water, it can generate corrosive phosphoric acid, even highly toxic metaphosphoric acid, forming acid rain, which seriously endangers the ecological environment and human health. In production, a bag filter is usually used to collect copper-phosphorus alloy smelting dust, but P 2 o 5 It is easy to absorb moisture, and sticks to carbon black to form a viscous substance, which adheres to the inner wall of the smoke pipeline and the filter bag, and blocks the filter bag. The dust removal efficiency is low and it is not conducive to the recovery and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D47/06B01D53/46B01D53/78B01D53/96C01B25/18
CPCB01D47/06B01D53/46B01D53/78B01D53/96C01B25/18B01D2258/0283B01D2257/55Y02P20/10
Inventor 龙伟民纠永涛董博文郝庆乐程亚芳于新泉侯江涛李胜男
Owner ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD