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Acetylene sludge desulfurization and denitrification based method for manufacturing foaming heat insulating material

A technology for desulfurization, denitrification, and thermal insulation materials, which is applied in the direction of separation methods, chemical instruments and methods, ceramic products, etc., can solve the problems of increasing the amount of desulfurizing agent, system shutdown, and increasing power consumption, etc., to achieve low prices and solve high energy consumption , the effect of reducing production costs

Inactive Publication Date: 2018-02-23
中晶蓝实业集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the contact area of ​​the packed tower is large, the power consumption is increased due to the large pressure drop during operation, and the packed tower is prone to problems such as scaling and blockage, which may even cause system shutdown
CN1654400A discloses a method for producing high-purity gypsum by using waste calcium carbide slag, but the by-products cannot be effectively used because the by-products cannot be effectively removed during the flue gas removal process
[0004] CN101898083A and CN104437023A disclose methods for producing desulfurizers from calcium carbide slag. The working conditions of the desulfurizers require higher temperatures, small diffusion areas of the desulfurizers, and low adsorption capacity, which will also increase the amount of desulfurizers used, thus causing an increase in costs.
[0005] To sum up, in the prior art, there is no process for using solid waste materials in the field of flue gas purification to effectively improve the efficiency of flue gas purification, reduce operating costs, and at the same time use purification by-products and industrial solid waste to manufacture building materials

Method used

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  • Acetylene sludge desulfurization and denitrification based method for manufacturing foaming heat insulating material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] (1) Add the desulfurizer composed of magnesia, red mud and carbide slag with a particle size of 200 meshes to waste water (pH about 10) to make a desulfurizer slurry, which is sent to the circulating slurry pool at the bottom of the desulfurization tower. The weight ratio of desulfurizer and waste water is 1:9. Wherein, the components and parts by weight of the desulfurizer are:

[0060] Carbide slag (the content of calcium hydroxide is 85wt%) 30 parts by weight;

[0061] Red mud (the content of calcium oxide and sodium oxide is 50wt%) 35 parts by weight;

[0062] Magnesium oxide (the content of active magnesium oxide is 70%) 35 parts by weight.

[0063] (2) Ozone is produced by the ozone generator, and enters the desulfurization and denitrification tower through the ozone booster fan and the ozone injection pipeline. The nitrogen oxides (especially NO) in the flue gas contact with the ozone and are oxidized. The oxidized nitrogen oxides contact with the moisture in ...

Embodiment 2

[0072] The foam insulation material was produced in the same manner as in Example 1 except using the following formula or steps.

[0073] The components and parts by weight of the desulfurizer are:

[0074] Carbide slag 40 parts by weight;

[0075] 20 parts by weight of red mud;

[0076] Magnesium oxide 40 parts by weight.

[0077] The parts by weight of the raw materials in the mixing and foaming step are as follows: 130 parts of desulfurization and denitrification slurry, 45 parts of magnesium oxide, 120 parts of industrial solid waste, 10 parts of foaming agent, 5 parts of coagulation regulator, and 5 parts of polyvinyl alcohol fiber. Stir at high speed for 8s.

[0078] The desulfurization and denitrification effects of Example 2 are shown in Table 2, and the performance test results of the foam insulation material of Example 2 are shown in Table 3.

Embodiment 3

[0080] The foam insulation material was produced in the same manner as in Example 1 except using the following formula or steps.

[0081] The components and parts by weight of the desulfurizer are:

[0082] Carbide slag 20 parts by weight;

[0083] 50 parts by weight of red mud;

[0084] Magnesium oxide 30 parts by weight.

[0085] The parts by weight of the raw materials in the mixing and foaming step are as follows: 150 parts of desulfurization and denitrification slurry, 55 parts of magnesium oxide, 100 parts of industrial solid waste, 10 parts of foaming agent, 5 parts of coagulation regulator, and 15 parts of polyvinyl alcohol fiber. Stir at high speed for 10s.

[0086] The desulfurization and denitrification effects of Example 3 are shown in Table 2, and the performance test results of the foam insulation material of Example 3 are shown in Table 3.

[0087] Table 2 Statistical table of flue gas desulfurization and denitrification effects of each embodiment

[0088] ...

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Abstract

The invention discloses an acetylene sludge desulfurization and denitrification based method for manufacturing a foaming heat insulating material. The method comprises the following steps: adding a desulfurizer into alkaline industrial wastewater to prepare a desulfurizer liquid, wherein the desulfurizer comprises an acetylene sludge, red mud and magnesium oxide, the granularity of the acetylene sludge, the red mud and the magnesium oxide respectively reaches more than 200 meshes; enabling the desulfurizer liquid and 1-15 wt% of ozone to be in contact with the flue gas; discharging the liquidwhen the pH value of an absorption liquid is 5.3-6.8, adding magnesium oxide into the discharged liquid to obtain a desulfurization and denitrification liquid; mixing the raw materials including the desulfurization and denitrification liquid, the magnesium oxide, the industrial solid waste, a foaming agent and a polyvinyl alcohol fiber, foaming and forming to obtain a preformed body; and maintaining the preformed body for 3-8 hours at the temperature of 20-60 DEG C at the humidity of 50-100%. The method solves the problems of atmospheric pollution caused by sulfur dioxide and oxynitride, and also utilizes the industrial wastewater and the industrial solid waste to obtain the qualified foaming heat insulating material.

Description

technical field [0001] The invention relates to a method for manufacturing a foamed thermal insulation material, in particular to a method for producing a foamed thermal insulation material based on desulfurization and denitrification slurry formed by a mixed base desulfurization and denitrification agent and ozone and other wastes. Background technique [0002] Foamed cement products are an inorganic thermal insulation material with excellent performance. Sulphoaluminate cement is widely used in foamed cement products because of its rapid setting and early strength. CN104261864A, CN102964097A and CN102863194A have successively disclosed the development and improvement of foamed cement insulation boards in terms of fire prevention, heat preservation, energy saving and environmental protection, anti-aging, compression resistance, etc., so that the application range of foamed insulation boards has been greatly developed. However, there are still some problems in the applicati...

Claims

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Application Information

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IPC IPC(8): C04B28/30C04B38/02C04B18/06B01D53/80B01D53/50B01D53/76B01D53/56
CPCB01D53/502B01D53/56B01D53/76B01D2251/104B01D2251/402B01D2251/404B01D2258/0283C04B18/062C04B28/30C04B2201/20C04B2201/32C04B2201/50C04B18/142C04B18/08C04B18/0445C04B18/04C04B22/068C04B22/144C04B16/0641C04B38/02Y02W30/91
Inventor 童裳慧
Owner 中晶蓝实业集团有限公司
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