Method and system for carrying out incineration on high N-S-based saliferous organic waste liquor and carrying out purification treatment on tail gas

A technology for purifying organic waste liquid and tail gas, applied in the direction of combustion method, incinerator, combustion type, etc., can solve problems such as bed material agglomeration, fluidization failure, and increased consumption of oxidant, and achieve the effect of reducing operating costs and improving utilization rate

Active Publication Date: 2012-01-04
BEIJING HANGHUA ENERGY SAVING ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional treatment methods, including biochemical methods, deep oxidation methods, and fluidized incineration methods, cannot be industrialized due to some disadvantages.
Therefore, the discharge of such waste water has caused great pressure on the environmental protection of fine chemical industries such as pesticides, dyes, and pharmaceuticals, and even threatened the survival of some fine chemical companies.
[0003] The effect of biochemical treatment is not ideal when it is applied to chemical wastewater such as printing and dyeing, pesticide and pesticide intermediates and other high-salt wastewater
Because the salt concentration in the wastewater is too high, it will inhibit the growth of microorganisms. When the NaCl in the wastewater exceeds 4000mg/L, the NaCl 2 SO 4 The content exceeds 2500mg/L, which has a strong inhibitory effect on activated sludge. In addi

Method used

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  • Method and system for carrying out incineration on high N-S-based saliferous organic waste liquor and carrying out purification treatment on tail gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The composition of the high N-S salt-containing organic waste liquid to be incinerated and purified is shown in Table 1 below:

[0028] Table 1

[0029] sample 1

Composition (wt%)

Hydroxyacetonitrile

7.38％

Glycyl nitrile

0.97％

Iminodiacetonitrile

13.46％

Nitrilotriacetonitrile

5.14％

ammonium sulfate

16.33％

moisture

46.72％

other organic matter

10％

total

100％

[0030] The steps of using the method of the present invention to process the above-mentioned high N-S base salt-containing organic waste liquid are as follows:

[0031] (1) High N-S base salt-containing organic waste liquid and combustion-supporting air enter the incinerator from the top of the "L" type incinerator 4, and the reaction temperature in the incinerator 4 is 1100-1200°C (for example, 1100°C, 1150°C or 1200°C) , in the presence of oxygen, the waste liquid is oxidized and decompose...

Embodiment 2

[0037] like figure 1 As shown, the incineration and tail gas purification treatment system of a high N-S base salt-containing organic waste liquid according to the present invention includes a waste liquid incineration system, a flue gas desulfurization and denitrification system, a flue gas dust removal system, a waste heat recovery system and Flue gas scrubbing system;

[0038] The waste liquid incineration system includes an incinerator 4, and the waste liquid supply pipeline and the combustion air supply pipeline are respectively connected to the top plate inlet of the incinerator 4; the starting end of the waste liquid supply pipeline is connected to the waste liquid tank 1, A waste liquid pump 2 is also provided on the waste liquid supply pipeline; a blower 3 is provided on the combustion air supply pipeline;

[0039] The flue gas desulfurization and denitration system includes a flue gas injector 5, a silo 6, a desulfurization and denitrification reactor 7, a separator...

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Abstract

The invention relates to a method and a system for carrying out incineration on high N-S-based saliferous organic waste liquor and carrying out purification treatment on tail gas. The system comprises a waste liquor incineration system, a flue gas desulfurization/denitration system, a flue gas dedusting system, a waste heat recovery system and a flue gas washing system which are sequentially connected. High N-S-based organic waste liquor is oxidized in the state of high temperature; after being oxidized completely, the high N-S-based organic waste liquor is fed into a desulfurization/denitration reactor so as to carry out thorough purification on flue gas; then, the purified flue gas is subjected to waste heat recovery. In the invention, an operation of waste liquor incineration and an operation of flue gas purification are performed in a segmented mode, therefore, not only is an incineration temperature required by thoroughly decomposing organic constituents in waste liquor satisfied, but also a favorable condition is created for subsequent desulfurization/denitration reactions. By using the method and system provided by the invention, when waste liquor and waste gas are processed, a great deal of flue gas waste heat is recovered, and a byproduct saturated steam is handled, thereby effectively reducing the operating cost of the incinerator.

Description

technical field [0001] The invention belongs to the technical field of environmental protection technology for chemical industry salt-containing organic waste liquid treatment, and in particular relates to a high N-S base salt-containing organic waste liquid incineration and tail gas purification treatment method and system thereof. Background technique [0002] The so-called high N-S organic waste liquid is rich in NO 3 - , NH 4 + , SO 4 2- 、CN - Plasma organic solution, the waste liquid is characterized by high concentration ((NH 4 ) 2 SO 4 concentration as high as 15%), high toxicity, high calorific value and usually containing sodium salt. Conventional treatment methods, including biochemical method, deep oxidation method and fluidized incineration method, cannot be industrialized due to some disadvantages. Therefore, the discharge of such waste water has caused great pressure on the environmental protection of fine chemical industries such as pesticides, dyes,...

Claims

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Application Information

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IPC IPC(8): F23G7/04F23J15/04
Inventor 徐扬胡广红姜振华杨志刚崔晓兰刘迪李永胜安兵涛王军罗哲
Owner BEIJING HANGHUA ENERGY SAVING ENVIRONMENTAL PROTECTION TECH CO LTD
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