CN212068318U - Small-size domestic waste incinerator flue gas minimum discharge integration processing system - Google Patents
Small-size domestic waste incinerator flue gas minimum discharge integration processing system Download PDFInfo
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- CN212068318U CN212068318U CN201922394265.5U CN201922394265U CN212068318U CN 212068318 U CN212068318 U CN 212068318U CN 201922394265 U CN201922394265 U CN 201922394265U CN 212068318 U CN212068318 U CN 212068318U
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Abstract
The utility model discloses an integrated processing system is discharged to small-size domestic waste incinerator flue gas minimum, including quench tower, cyclone, draught fan and the wet-type SOx/NOx control dust removal degree of depth purifying tower that connects gradually, be equipped with the flue blender on the flue between draught fan and the wet-type SOx/NOx control dust removal degree of depth purifying tower, the flue blender is connected with ozone generator, the wet-type SOx/NOx control dust removal degree of depth purifying tower has alkali lye circulation system, and the top sets up the chimney in line. The utility model discloses an ultralow integration processing system equipment that discharges of flue gas is few, the device is simple, area is little, enables small-size burning furnace flue gas that burns and reaches the ultralow requirement of discharging.
Description
Technical Field
The utility model belongs to the technical field of msw incineration technique and flue gas treatment technique, concretely relates to small-size domestic waste incinerator flue gas minimum discharge integration processing system.
Background
In the recent years, the 'guidance suggestions about improving the rural residential environment' are issued by the office of the national institute of affairs, the basic conditions of housing, drinking water, traveling and the like of rural residents in China are obviously improved by 2020, the residential environment is basically clean, tidy and convenient, and a batch of beautiful and livable villages with various characteristics are built.
At present, the problem of rural domestic garbage becomes the most urgent environmental problem to be solved. The domestic garbage of villagers is directly incinerated in the open air without any subsequent treatment, and the environmental safety and the living environment of residents are seriously influenced. Ash and Nitrogen Oxides (NO) produced by burning garbagex) Sulfur dioxide (SO)2) Sulfur trioxide (SO)3) Hydrogen chloride (HCl), Hydrogen Fluoride (HF), dioxin, and the like are more harmful, and can directly affect the surrounding environmental quality and harm the physical and mental health of people. With the increasing attention of governments at all levels on environmental protection, environmental protection departments in various regions have more and more severe control on the total amount of pollutant emission. Therefore, it is important to popularize an incineration disposal apparatus having a high-efficiency flue gas purification system.
The traditional waste incineration flue gas wet treatment device is generally composed of a set of treatment equipment in sequence, the incineration flue gas firstly enters a quench tower for cooling, the temperature of the flue gas is reduced, then the flue gas enters a cyclone dust collector, large-particle dust is removed, then the flue gas enters a wet flue gas absorption device, soluble pollutants in the flue gas are absorbed, and the purified flue gas meets the waste incineration flue gas emission standard, but because the gaseous pollutants generated by waste incineration are various in types, the traditional waste incineration flue gas wet treatment device is only suitable for conventional flue gas treatment facilities, and the requirement of 18485-2014 'pollution control standard for domestic waste incineration' on stable reaching is difficult to ensure.
In order to meet the requirement of ultralow emission of the flue gas of the small-sized incinerator, ensure the high-quality stable operation of the system and realize the maximum environmental protection benefit, the invention provides the integrated treatment system for the ultralow emission of the flue gas of the small-sized domestic garbage incinerator.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem that the flue gas treatment of the existing small-sized domestic garbage incinerator exists, the utility model aims to provide a small-sized domestic garbage incinerator flue gas ultralow emission integrated treatment system, equipment is few, the device is simple, area is little, enables small-sized incinerator flue gas to reach the ultralow emission requirement.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a small-size domestic waste incinerator flue gas minimum discharge integration processing system, is including quench tower, cyclone, draught fan and the wet-type SOx/NOx control dust removal degree of depth purifying column that connects gradually, be equipped with the flue blender on the flue between draught fan and the wet-type SOx/NOx control dust removal degree of depth purifying column, the flue blender is connected with ozone generator, the wet-type SOx/NOx control dust removal degree of depth purifying column has alkali lye circulation system, and the top sets up the chimney in line.
Further, the alkali liquor circulating system comprises an alkali liquor outlet pipe, an alkali liquor circulating pump and an alkali liquor inlet pipe, wherein a plurality of alkali liquor spraying branch pipes are vertically distributed on the alkali liquor inlet pipe, and the alkali liquor spraying branch pipes stretch into the wet-type desulfurization, denitrification and dust removal deep purification tower to form a plurality of alkali liquor spraying layers.
Furthermore, a sedimentation tank, a filter tank and an alkali liquor tank are sequentially connected between the wet desulfurization denitration dedusting deep purification tower and the inlet of the alkali liquor circulating pump.
Furthermore, a plurality of ceramic packing layers are arranged in the wet desulfurization denitration dedusting deep purification tower, and the ceramic packing layers and the alkali liquor spraying branch pipes are arranged at intervals and used for removing dust particles of flue gas entering the tower and slurry carried by the flue gas.
Furthermore, a demister is arranged between the alkali liquor spraying branch pipe and the direct exhaust chimney and is used for separating fog drops and dust carried by the flue gas of the tower.
Compared with the prior art, the utility model has the advantages that:
(1) this system denitration part does not independently set up reaction unit, adopts ozone to spout into in the flue blender, oxidizes nitrogen oxide after with flue gas homogeneous mixing, depends on in the wet-type SOx/NOx control dust removal deep purification device tower alkali lye spray absorption and carries out the denitration, and area is little, invests in for a short time, and is high to low concentration nitrogen oxide's treatment effeciency.
(2) The desulfurization part of the system is provided with a spray layer and a ceramic packing layer, and the gas is purified by collecting dust through a liquid net, a liquid film or liquid drops generated by the interaction of slurry, packing and flue gas during operation by utilizing inertial collision, interception, gas diffusion effect and the like. Compared with the empty tower spraying, the liquid film has larger specific surface area than liquid drops, the gas-liquid mixing efficiency is higher, and the desulfurization and dust removal efficiency is higher.
(3) The system adopts alkali liquor as an absorbent and can absorb SO2、SO3Removing acidic substances or gases such as HCl, HF and the like.
(4) This system does not set up the chimney alone, compares in the independent supporting low-order chimney of traditional handicraft, and the supporting direct vent chimney height at wet-type SOx/NOx control dust removal deep purification tower top is higher relatively, does not have the low-altitude and discharges the problem to all around environmental pollution, and area is little, and the investment is littleer.
(5) The deep dust removal system is provided with the demister and the ceramic filler layer, and has small floor area and small investment compared with a cloth bag dust remover in the traditional dust removal process on the premise of equal efficiency; in addition, in the traditional process, the bag-type dust remover is arranged behind the alkaline washing tower, the water content in the flue gas is high, and the bag-sticking phenomenon of the bag-type dust remover is easy to occur during operation, so that the normal operation of the system is influenced.
(6) The system can realize ultralow emission, has simpler treatment process, smaller system resistance and less operating cost, and has stronger economical efficiency and practicability.
Drawings
Fig. 1 is a schematic structural view of a small-sized domestic waste incinerator flue gas ultra-low emission integrated treatment system in embodiment 1 of the present invention;
wherein: 1. quench tower, 2, cyclone, 3, draught fan, 4, flue blender, 5, ozone generator, 6, wet-type SOx/NOx control dust removal degree of depth purifying column, 7, alkali lye outlet pipe, 8, sedimentation tank, 9, filtering ponds, 10, alkali lye pond, 11, alkali lye circulating pump, 12, alkali lye inlet pipe, 13, alkali lye spray branch pipe, 14, ceramic packing layer, 15, defroster, 16, direct vent chimney.
Detailed Description
The technical solutions in the embodiments of the present invention will be described in detail and clearly, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left", "right", "top" and "bottom" will be used hereinafter to refer only to the directions of the top, bottom, left, right, top and bottom of the drawings, and shall not be construed as limiting the structure.
Example 1
As shown in figure 1, for the utility model relates to an integrated processing system is discharged to preferred small-size domestic waste incinerator flue gas minimum, including quench tower 1, cyclone 2, draught fan 3 and the deep purification tower 6 of wet-type SOx/NOx control dust removal that connects gradually.
A flue mixer 4 is arranged on a flue between the induced draft fan 3 and the wet type desulfurization denitration dedusting deep purification tower 6, ozone generated by the ozone generator 5 is injected into the flue mixer 4, so that the ozone and the flue gas are fully mixed, and NO which is insoluble in water in the flue gas is oxidized into high-valence nitrogen oxide which is easily soluble in water, including NO2，N2O3，N2O5。
Wet desulfurization denitration dust-removing deep purificationThe tower has alkali lye circulation system, alkali lye circulation system includes alkali lye outlet pipe 7, sedimentation tank 8, filtering ponds 9, alkali lye pond 10, alkali lye circulating pump 11 and alkali lye inlet tube 12, takes place the natural sedimentation after alkali lye outlet pipe 7 exhaust thick liquid gets into sedimentation tank 8, and the rethread embeds the filtering ponds 9 that has corrosion resistance filter screen and filters the thick liquid, can let in oxygen in the filtering ponds simultaneously in the filtering process, with the Na in the thick liquid2SO3Oxidized to Na2SO4And finally, the alkali solution enters an alkali solution pool 10, and the pH value of the alkali solution in the alkali solution pool is controlled to be about 9 by adopting additional flake alkali. The alkali liquor inlet pipe 12 is vertically distributed with 4 layers of alkali liquor spraying branch pipes 13, the alkali liquor in the alkali liquor pool 10 is sent into the 4 layers of alkali liquor spraying branch pipes 13 through the alkali liquor circulating pump 11 via the alkali liquor inlet pipe 12 to form 4 layers of alkali liquor spraying layers in the wet-type desulfurization denitration dust removal deep purification tower 6, and the alkali liquor is sprayed and then is mixed with NO in the flue gas2、N2O3、N2O5、SO2、SO3And acid gases such as HCl and HF are fully reacted and absorbed.
The top of the wet desulfurization denitration dedusting deep purification tower 6 is provided with the direct exhaust chimney 16, the chimney does not need to be independently arranged, the height of the direct exhaust chimney can meet the requirement of flue gas emission, the problem of pollution of low-altitude emission to the surrounding environment does not exist, the occupied area is small, and the investment is smaller.
The treatment process of the flue gas at the outlet of the incinerator by the small-sized domestic garbage incinerator flue gas ultralow-emission integrated treatment system in the embodiment is as follows:
the method comprises the following steps: fromControlling the temperature of the outlet of the incinerator to be high-temperature flue gas (SO) above 850 DEG C2Concentration 300mg/Nm3Left and right, NOxThe concentration was 320mg/Nm3Dust particle concentration of 280mg/Nm3) Cooling the mixture to 150-160 ℃ in a quenching tower;
step two: the flue gas at the outlet of the quench tower enters a cyclone dust collector for primary dust removal, and the concentration of the outlet dust is controlled at 150mg/Nm3Then enters a draught fan;
step three: ozone produced by an ozone generator is injected into a flue mixer at the outlet of a draught fan, so that the ozone is fully mixed with the flue gas, and NO which is insoluble in water in the flue gas is oxidized into high-valence nitrogen oxide which is easily soluble in water, wherein the high-valence nitrogen oxide comprises NO2，N2O3，N2O5；
NO in flue gasxMainly consists of NO (95%), which is insoluble in water and is oxidized by ozone to high-valence NO2、N2O3、N2O5Being soluble in water to generate HNO2And HNO3The dissolving capacity is greatly improved.
The main reaction equation is as follows:
NO+O3→NO2+O2
2NO2+O3→3N2O5+O2
N2O5+H2O→2HNO3
step four: in the wet-type desulfurization denitration dust removal deep purification tower, NaOH solution sent by the alkali liquor circulating pump passes through the 4 layers of alkali liquor spraying branch pipes and NO in the flue gas2、N2O3、N2O5、SO2、SO3Acid gases such as HCl and HF are absorbed after fully reacting; the alkali liquor after absorbing the acid gas passes through the sedimentation tank, the filtering tank and the alkali liquor tank, the pH value is controlled to be about 9, and then the alkali liquor is conveyed into the wet-type desulfurization, denitrification and dedusting deep purification tower through an alkali liquor inlet pipe by an alkali liquor circulating pump;
step five: the flue gas absorbed by NaOH solution passes through the ceramic in the wet desulfurization denitration dedusting deep purification towerThe packing layer removes dust particles of the flue gas entering the tower and slurry carried by the flue gas, the fog drops and dust carried by the flue gas leaving the tower are removed by the demister, the flue gas is discharged by a direct discharging chimney, and SO in the flue gas discharged outside the tower2Concentration < 30mg/Nm3(mean over 24 hours), NOxConcentration < 50mg/Nm3(average over 24 hours), dust < 20mg/Nm3(mean over 24 hours), HCl concentration < 50mg/Nm3(average over 24 hours).
Claims (5)
1. The utility model provides a small-size domestic waste incinerator flue gas minimum discharges integration processing system which characterized in that: including quench tower (1), cyclone (2), draught fan (3) and wet desulfurization denitration dust removal degree of depth purifying tower (6) that connect gradually, be equipped with flue blender (4) on the flue between draught fan (3) and wet desulfurization denitration dust removal degree of depth purifying tower (6), flue blender (4) are connected with ozone generator (5), wet desulfurization denitration dust removal degree of depth purifying tower (6) have alkali lye circulation system, and the top sets up in line chimney (16).
2. The integrated treatment system for the ultra-low emission of the flue gas of the small household garbage incinerator according to claim 1, characterized in that: the alkali liquor circulating system comprises an alkali liquor outlet pipe (7), an alkali liquor circulating pump (11) and an alkali liquor inlet pipe (12), wherein a plurality of alkali liquor spraying branch pipes (13) are vertically distributed on the alkali liquor inlet pipe (12), and the alkali liquor spraying branch pipes (13) stretch into the wet-type desulfurization, denitrification and dedusting deep purification tower (6) to form a plurality of alkali liquor spraying layers.
3. The integrated treatment system for the ultra-low emission of the flue gas of the small household garbage incinerator according to claim 2, characterized in that: a sedimentation tank (8), a filter tank (9) and an alkali liquor tank (10) are sequentially connected between the wet desulfurization denitration dedusting deep purification tower (6) and an inlet of an alkali liquor circulating pump (11).
4. The integrated treatment system for the ultra-low emission of the flue gas of the small household garbage incinerator according to claim 2, characterized in that: a plurality of ceramic packing layers (14) are arranged in the wet desulfurization denitration dedusting deep purification tower (6), and the ceramic packing layers (14) and the alkali liquor spraying branch pipes (13) are arranged at intervals.
5. The integrated treatment system for the ultra-low emission of the flue gas of the small household garbage incinerator according to claim 4, characterized in that: a demister (15) is arranged between the alkali liquor spraying branch pipe (13) and the direct discharge chimney (16).
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112604448A (en) * | 2020-12-17 | 2021-04-06 | 宜昌江峡船用机械有限责任公司 | Garbage incinerator spray tower and garbage incinerator |
| CN113289441A (en) * | 2021-06-04 | 2021-08-24 | 中国矿业大学 | Device and method for purifying domestic garbage cracking gasification tail gas |
| CN115445417A (en) * | 2022-08-11 | 2022-12-09 | 济南和利时自动化工程有限公司 | Flue gas desulfurization and denitrification integrated system |
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2019
- 2019-12-26 CN CN201922394265.5U patent/CN212068318U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112604448A (en) * | 2020-12-17 | 2021-04-06 | 宜昌江峡船用机械有限责任公司 | Garbage incinerator spray tower and garbage incinerator |
| CN113289441A (en) * | 2021-06-04 | 2021-08-24 | 中国矿业大学 | Device and method for purifying domestic garbage cracking gasification tail gas |
| CN115445417A (en) * | 2022-08-11 | 2022-12-09 | 济南和利时自动化工程有限公司 | Flue gas desulfurization and denitrification integrated system |
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