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A kind of preparation method of deodorizing sludge charcoal cloth

A technology for sludge charcoal and sludge is applied in the field of preparation of deodorizing materials, which can solve the problems of uneven distribution of activated carbon powder on the surface of carbon cloth, large energy consumption in the preparation process, and difficulty in industrialization promotion, etc., and achieves good deodorization effect and low cost. , the effect of reducing the production cost

Active Publication Date: 2020-01-17
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The commonly used sludge charcoal preparation method is mainly the chemical activation method, but due to the use of zinc chloride, potassium hydroxide and other activating agents, the cost of sludge charcoal preparation is relatively high, and it is easy to cause secondary pollution
[0004] Sulfur-containing odorous substances are dangerous gases under strict control. There are many adsorption and removal methods for odorous substances in the ambient air. Among them, deodorization of sludge charcoal has also been studied. However, powdered carbon obtained by pyrolysis and carbonization is difficult to transport due to its large air resistance. , it is difficult to carry out industrial promotion
[0005] At present, the preparation of activated carbon cloth mostly adopts hot pressing method and impregnation method, but these two methods generally have defects such as uneven distribution of activated carbon powder on the surface of carbon cloth and high energy consumption in the preparation process.

Method used

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Effect test

preparation example Construction

[0034] A preparation method of sludge charcoal cloth, characterized in that: the preparation of sludge charcoal cloth includes the preparation of powdered sludge charcoal, the preparation of sludge charcoal mixture, and the coating process, and consists of the following steps:

[0035] Step 1: Put the corn cob ash in a beaker, add water according to the solid-liquid ratio (m / V) of corn cob ash to water (m / V) of 1:23~1:25, heat at 80°C~90°C, stir, and filter to retain the filtrate As corn cob ash extract;

[0036] Step 2: Take the remaining sludge particles smaller than 80 mesh as raw materials, mix and immerse the sludge and corn cob ash extract according to the solid-to-liquid ratio (m / V) 1:45~1:50 for 16 hours~24h. The sludge is put into an oven and dried at 80℃~90℃;

[0037] Step 3: Put the dried sludge into a tubular resistance furnace at a carbonization temperature of 550℃~600℃, a heating rate of 8℃ / min~10℃ / min, a carbonization time of 75min~90min, under nitrogen protection Ca...

example 1

[0044] Mix 2.0g corn cob ash with 50ml distilled water to prepare the plant ash leaching solution. Place the leaching solution in a beaker, cover the mouth of the beaker with an evaporating dish, and heat the leaching solution to 80°C~90°C and continue Stir, stop heating and stirring after 2 hours, filter and retain the filtrate; pass the collected residual sludge of the sewage plant through an 80-mesh sieve, mix 1.0g of sludge with 45ml of corn cob ash extract, and use a glass rod after mixing Stir so that the sludge can be immersed in the leaching solution. Seal the beaker containing the mixed solution with a sealing film. The immersion time is 24h. After taking it out, remove the sealing film, and put the beaker containing the sludge in the oven at 85 Dry at ℃, and put the dried sludge into a tubular resistance furnace; set the carbonization temperature to 600℃, carbonization time to 75min, and heating rate to 10℃ / min to carbonize the sludge; put the carbonized material Add ...

example 2

[0046] Mix 2.0g corn cob ash with 50ml distilled water to prepare a plant ash leaching solution. Place the leaching solution in a beaker, cover the mouth of the beaker with an evaporating dish, and heat the leaching solution to 80°C~90°C continuously Stir, stop heating and stirring after 2 hours, filter and retain the filtrate; pass the collected sludge from the sewage plant through an 80-mesh sieve, mix 1.0g of sludge with 50ml of corn cob ash extract, and use a glass rod after mixing Stir so that the sludge can be immersed in the leaching solution. Seal the beaker containing the mixture with a sealing film. The immersion time is 24h. After taking it out, remove the sealing film, and put the beaker containing the sludge in an oven at 85℃ Dry, put the dried sludge into a tubular resistance furnace; set the carbonization temperature to 600°C, the carbonization time to 75min, and the heating rate to 10°C / min to carbonize the sludge; put the carbonized material Add distilled water...

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Abstract

The invention belongs to the field of preparation of deodorizing materials, and in particular relates to a preparation method of sludge charcoal cloth for deodorizing substances. In this method, powdered sludge charcoal is firstly prepared from excess sludge and corn cob ash leaching liquid; then powdered sludge charcoal, dispersant and binder are mixed in a certain proportion to prepare a sludge-charcoal mixture; The machine applies the sludge-charcoal mixture to the non-woven fabric to obtain the final product. The invention has the advantages of simple process, good deodorizing effect of sludge charcoal cloth, the raw material of powdered sludge charcoal is solid waste, and the activator used is plant ash leaching solution, which reduces the preparation cost of charcoal cloth and realizes waste The resource utilization is suitable for industrial scale production.

Description

Technical field [0001] In the field of preparation of deodorizing materials, the present invention specifically relates to a method for preparing sludge charcoal cloth for removing malodorous substances. Background technique [0002] In order to alleviate the water crisis, my country has built a large number of sewage treatment plants. However, while sewage treatment, the pollution of excess sludge and malodorous gas inevitably arises. [0003] The surplus sludge of the sewage treatment plant is rich in organic matter, and there are also harmful substances such as heavy metals and pathogenic bacteria. If it is not handled properly, it will inevitably cause secondary pollution of the environment. Sludge pyrolysis carbonization technology has always been considered as the best way to solve sludge. The prepared sludge charcoal has extensive research in the field of pollutant adsorption because of its rich pore structure and large specific surface area. The commonly used method of pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30B01D53/04
Inventor 李芬王鹤丁为民姜波
Owner HARBIN UNIV OF SCI & TECH