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Composition for purifying tail gas of grain dryer based on activated alumina modification and its preparation method and application

An activated alumina and dryer technology, applied in chemical instruments and methods, separation methods, gas treatment and other directions, can solve problems such as the effect of exhaust gas treatment is not very ideal, the dust particles are difficult to be completely clear, and the exhaust gas has not been solved. Achieve the effect of excellent purification ability, excellent absorption capacity and easy promotion

Active Publication Date: 2018-09-04
江苏热风环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This exhaust gas treatment method not only requires a large space and equipment, but also the effect of exhaust gas treatment is not very ideal. On the one hand, it is difficult to completely clear the dust particles; produced carbon monoxide) has not been resolved

Method used

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  • Composition for purifying tail gas of grain dryer based on activated alumina modification and its preparation method and application

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preparation example Construction

[0015] The invention provides a method for preparing a composition for purifying tail gas of a grain dryer based on activated alumina modification, the preparation method comprising:

[0016] 1) In the presence of protective gas, the bentonite is calcined to obtain bentonite powder;

[0017] 2) placing activated carbon powder, wheat bran powder, fly ash and bentonite powder in an acid solution for activation treatment to obtain an activation mixture;

[0018] 3) MDI (4,4,-diphenylmethane diisocyanate), TDI (toluene diisocyanate), polyether polyol, activated alumina, potassium titanium oxalate and the activated mixture are contacted in the presence of ultrasonic waves to produce Get foaming resin;

[0019] 4) Pulverizing the foaming resin to obtain foaming resin powder, and then mixing anionic surfactant, water and foaming resin powder to prepare a composition for purifying grain dryer exhaust gas modified based on activated alumina.

[0020] In step 1) of the above-mentioned...

Embodiment 1

[0036] 1) In the presence of protective gas (nitrogen), the bentonite was calcined at 430° C. for 5 hours to obtain bentonite powder (particle size below 10 μm);

[0037] 2) Mix activated carbon powder (below 10 μm in particle size), wheat bran powder (below 10 μm in particle size), fly ash (below 10 μm in particle size), bentonite powder and acid solution (pH 4) according to the ratio of 100:24:15:39 : mixed at a weight ratio of 400, and activated at 48°C for 1.2h to obtain an activated mixture;

[0038] 3) MDI, TDI, polyether polyol (brand L61), activated alumina, potassium titanium oxalate and the activation mixture according to the weight ratio of 100:20:120:19:1.2:34 in the presence of ultrasonic waves with a frequency of 25MHz And carry out a contact reaction at 75°C for 8 hours to obtain a foaming resin;

[0039] 4) Pulverize the foaming resin to obtain foaming resin powder (below 10 microns), then mix anionic surfactant (sodium lauryl sulfate), water and foaming resin...

Embodiment 2

[0041]1) In the presence of protective gas (neon gas), calcining bentonite at 420°C for 4 hours to obtain bentonite powder (particle size below 10 μm);

[0042] 2) Mix activated carbon powder (below 10 μm in particle size), wheat bran powder (below 10 μm in particle size), fly ash (below 10 μm in particle size), bentonite powder and acid solution (pH 3.5) according to 100:20:12:35 : mixed at a weight ratio of 300, and activated at 45°C for 1 hour to obtain an activated mixture;

[0043] 3) MDI, TDI, polyether polyol (brand L64), activated alumina, potassium titanium oxalate and the activation mixture are in the presence of ultrasonic waves with a frequency of 20MHz according to the weight ratio of 100:15:110:15:0.5:30 And carry out a contact reaction at 60°C for 6 hours to obtain a foaming resin;

[0044] 4) Pulverize the foaming resin to obtain foaming resin powder (below 10 microns), then mix anionic surfactant (sodium lauryl sulfate), water and foaming resin powder in a we...

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Abstract

The invention discloses a composition for purifying grain drying machine tail gas based on activated aluminum oxide modification and a preparation method and application of composition. The method comprises the steps that 1, in the presence of shielding gas, bentonite is calcined to prepare bentonite powder; 2, activated carbon powder, wheat bran powder, pulverized fuel ash and the bentonite powder are placed in acid liquor to be activated to prepare an activated mixture; 3, MDI, TDI, polyether polyol, activated aluminum oxide, titanium potassium oxalate and the activated mixture are subjected to haptoreaction in the presence of ultrasonic waves to prepare foamex; 4, the foamex is crushed to obtain foamex powder, and an anion surface active agent, water and the foamex powder are mixed to prepare the composition for purifying the grain drying machine tail gas based on activated aluminum oxide modification. The composition has excellent purifying capacity on purification of the grain drying machine tail gas, meanwhile, the preparation method is easy to operate, and the raw materials are easy to obtain.

Description

technical field [0001] The invention relates to a composition for purifying the tail gas of a grain dryer, in particular to a composition for purifying the tail gas of a grain dryer based on activated alumina modification, its preparation method and application. Background technique [0002] The grain dryer is an assembly of a dryer. It is a general term for various equipment of grain dryer. According to the relative movement direction of the grain and the airflow, the dryer can be divided into cross-flow, mixed-flow, forward-flow, counter-current and forward-counter-current, mixed-counter-current, forward-mixed-flow and other types. The working principle of the grain dryer is: first, the air is heated into hot air by the heating device, and then the hot air is passed into the grain to heat the grain. [0003] After the grain heating is completed, the exhaust gas after the hot air cooling contains a large amount of dust particles and the exhaust gas produced by the grain r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30B01D53/02
CPCB01D53/02B01D2257/502B01D2258/02B01J20/06B01J20/262
Inventor 萧鲲
Owner 江苏热风环保科技有限公司
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