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

A diatomite and dryer technology, applied in chemical instruments and methods, separation methods, gas treatment, etc., can solve problems such as the effect of exhaust gas treatment is not very ideal, dust particles are difficult to be completely clear, and exhaust gas has not been solved. To achieve the effect of excellent purification capacity, excellent absorption capacity and easy promotion

Active Publication Date: 2018-08-21
WUHU CHANGQI FURNACE
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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 diatomite modification, its preparation method and application

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preparation example Construction

[0015] The invention provides a preparation method of a composition for purifying tail gas of a grain dryer based on diatomaceous earth modification. The preparation method includes:

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

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

[0018] 3) MDI (4,4,-diphenylmethane diisocyanate), TDI (toluene diisocyanate), polyether polyol, diatomaceous earth, tetrabutyl titanate and the activation mixture are contacted and reacted in the presence of ultrasound To make foamed resin;

[0019] 4) The foamed resin is pulverized to obtain a foamed resin powder, and then an anionic surfactant, water and the foamed resin powder are mixed to prepare a diatomite-based modified composition for purifying the exhaust gas of a grain dryer.

[0020] In step 1) of the above preparation method, the...

Embodiment 1

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

[0037] 2) Activated carbon powder (particle size 10μm or less), wheat bran powder (particle size 10μm or less), fly ash (particle size 10μm or less), bentonite powder and acid solution (pH 4) according to 100:24:15:42 :Mixed at a weight ratio of 400, and activated at 48°C for 1.2h to obtain an activated mixture;

[0038] 3) Combine MDI, TDI, polyether polyol (brand L61), diatomaceous earth, tetrabutyl titanate and activation mixture according to the weight ratio of 100:18:120:40:4:37 in the ultrasonic frequency of 25MHz The contact reaction is carried out at 75°C for 8 hours in the presence of the presence to obtain a foamed resin;

[0039] 4) Crush the foamed resin to obtain foamed resin powder (10 microns or less), and then mix the anionic surfactant (sodium lauryl sulfate), water and foamed resin powder in a weight ratio o...

Embodiment 2

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

[0042] 2) Activated carbon powder (particle size 10μm or less), wheat bran powder (particle size 10μm or less), fly ash (particle size 10μm or less), 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) Combine MDI, TDI, polyether polyol (brand L64), diatomaceous earth, tetrabutyl titanate and the activation mixture according to the weight ratio of 100:15:110:34:3:33 in the ultrasonic frequency of 20MHz The contact reaction is carried out at 60°C for 6 hours in the presence of the presence to obtain foamed resin;

[0044] 4) Crush the foamed resin to obtain foamed resin powder (10 microns or less), and then mix the anionic surfactant (sodium lauryl sulfate), water and the foamed resin powder in a weig...

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Abstract

The invention discloses a diatomite-based composition for purifying tail gas of a grain dryer and its preparation method and application. The preparation method comprises: 1) Calcining bentonite in the presence of protective gas to prepare Bentonite powder is obtained; 2) Activated carbon powder, wheat bran powder, fly ash and bentonite powder are placed in an acid solution for activation to obtain an activated mixture; 3) MDI, TDI, polyether polyol, diatomaceous earth, Tetrabutyl titanate and the activated mixture are subjected to a contact reaction in the presence of ultrasonic waves to obtain a foamed resin; 4) the foamed resin is pulverized to obtain a foamed resin powder, and then the anionic surfactant, water and the foamed resin powder are mixed Mixing to prepare a diatomaceous earth-modified composition for purifying grain dryer exhaust gas. The composition prepared by the method has excellent purification ability for purifying the tail gas of a grain dryer, and at the same time, the preparation method is simple 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 diatomaceous earth modification, and a preparation method and application thereof. Background technique [0002] The grain dryer is an assembly of a dryer. It is the collective name of various equipment of grain dryer. According to the relative movement direction of grain and air flow, the dryer can be divided into cross flow, mixed flow, cocurrent flow, counter flow and forward and counter flow, mixed counter flow, and mixed flow. The working principle of the grain dryer is as follows: First, the air is heated by a heating device into hot air, and then the hot air is passed into the grain to heat the grain. [0003] After the grain is heated, the exhaust gas cooled by the hot air contains a large number of dust particles and exhaust gas produced by the respiration of the grain. At present, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30B01D53/02B01D46/30
CPCB01D46/30B01D53/02B01D2257/502B01J20/12B01J20/26
Inventor 萧鲲
Owner WUHU CHANGQI FURNACE
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