CN214147938U - Device system for co-processing VOC waste gas and organic waste liquid - Google Patents
Device system for co-processing VOC waste gas and organic waste liquid Download PDFInfo
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- CN214147938U CN214147938U CN202022981578.3U CN202022981578U CN214147938U CN 214147938 U CN214147938 U CN 214147938U CN 202022981578 U CN202022981578 U CN 202022981578U CN 214147938 U CN214147938 U CN 214147938U
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Abstract
The utility model relates to a device system of VOC waste gas and organic waste liquid coprocessing, VOC waste gas and organic waste liquid are assistedThe device system for simultaneous treatment comprises an incinerator, a waste gas preheater, a primary air preheater, a secondary air preheater, a waste heat boiler and an SCR (selective catalytic reduction) denitration device; the incinerator comprises a reduction section and an oxidation section, wherein the reduction section is respectively and independently connected with a waste gas supply pipeline, a primary air supply pipeline, a supplementary fuel supply pipeline and an organic waste liquid supply pipeline; the waste gas supply pipeline is provided with a waste gas preheater; the primary air supply pipeline is provided with a primary air preheater; the device system provided by the utility model can reasonably utilize the heat of the smoke of the incinerator and burn NO generated in the smokeXThe content is less, and the composite application of incineration, SNCR denitration and SCR denitration can be realized.
Description
Technical Field
The utility model relates to an environmental protection technology field relates to a handle device system of discarded object, especially relates to a VOC waste gas and organic waste liquid coprocessing's device system.
Background
Volatile Organic Compounds (VOCs) are common pollutants discharged from petroleum, chemical engineering and places using organic solvents, organic components in VOC waste gas belong to toxic and pungent gases, and the direct contact of the organic components can cause harm to human health; if the VOC exhaust gas is discharged without being treated, it pollutes the environment. For toxic and harmful VOC waste gas which does not need to be recycled or has large recycling difficulty, incineration is the most suitable treatment technology and method; but conventional incineration has the presence of NO in the incineration gasesXHigher content of defects.
The organic waste liquid also contains a large amount of toxic and harmful organic substances, and if the organic waste liquid is directly discharged without treatment, the organic waste liquid not only can cause serious pollution to the environment, but also can threaten the human health through the transmission of drinking water and food chains. Moreover, the high-concentration organic waste liquid is difficult to be treated by the conventional biochemical process, so that an incineration method is required; but NO is also present in the incineration off-gasXHigher content of defects.
CN 110822457A discloses a method for reducing NO generated by incinerationXMethod of concentration and incinerator for reducing NO produced by incineration by reducing or even eliminating local high temperature points in incineratorXAnd (4) concentration. The incinerator comprises an incinerator body, a burner arranged at one end of the incinerator body, a VOC-containing waste gas inlet, an incinerated waste gas outlet and a combustion air inlet pipe connected to the burner, wherein the VOC-containing waste gas inlet is communicated with the VOC-containing waste gas inlet pipe, and the incinerated waste gas outlet is communicated with a waste gas outlet pipe; the combustion furnace also comprises a fuel gas inlet main pipe, a fuel gas first inlet pipe and a fuel gas second inlet pipeThe gas mixing device comprises a pipe and a mixing space, wherein one end of a first gas inlet pipe and one end of a second gas inlet pipe are respectively connected with a gas inlet main pipe, the other end of the first gas inlet pipe is communicated with a burner, the other end of the second gas inlet pipe is communicated with the mixing space, a VOC-containing waste gas inlet is positioned in the mixing space, a first control valve is installed in the first gas inlet pipe, and a second control valve is installed in the second gas inlet pipe. However, it is difficult to make reasonable use of the heat of combustion.
CN 210543929U discloses a VOC exhaust treatment device, including burning. VOC exhaust treatment device has realized through setting up of filter screen that to burn burning furnace waste gas dust removal processing, can improve the combustion efficiency of VOC waste gas, but can not reduce the NO who burns in the burning furnace waste gasXAnd (4) content.
CN 105889949A discloses organic waste water burns gasification system and burning gasification method, including fuel source, gasification incineration device, waste water source, oxygen source, steam source and synthetic gas purification recovery system, fuel source, waste water source, steam source and oxygen source all communicate with the entry of gasification incineration device, synthetic gas purification recovery system communicates with the export of gasification incineration device, and steam, waste water, fuel and oxygen burn in gasification incineration device, generate the synthetic gas, and the synthetic gas is retrieved after purifying. The organic wastewater incineration and gasification system and the incineration and gasification method combine the gasification furnace and the high-concentration organic wastewater incinerator into a whole, the synthesis gas is produced, the high-concentration organic wastewater is effectively treated, and the influence of the high-concentration organic wastewater on the surrounding environment is reduced, but the incineration and gasification system does not utilize the heat of incineration flue gas, and the NO in the incineration gas cannot be treatedXThe concentration of (c) is regulated.
Therefore, it is necessary to provide a new device system for co-processing the VOC waste gas and the organic waste liquid.
SUMMERY OF THE UTILITY MODEL
In view of the problems existing in the prior art, the utility model aims to provide a device system of VOC waste gas and organic waste liquid coprocessing, the device system of VOC waste gas and organic waste liquid coprocessing can the rational utilization heat of incinerator flue gas, and burns the NO that produces in the flue gasXThe content is less, and the composite application of incineration, SNCR denitration and SCR denitration can be realized.
To achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides a VOC waste gas and organic waste liquid coprocessing's device system, VOC waste gas and organic waste liquid coprocessing's device system is including burning furnace, waste gas preheater, air preheater, overgrate air preheater, exhaust-heat boiler and SCR denitrification facility.
The flue gas that burns burning furnace production flows through exhaust-heat boiler and SCR denitrification facility in proper order.
The incinerator comprises a reduction section and an oxidation section, wherein the reduction section is respectively and independently connected with a waste gas supply pipeline, a primary air supply pipeline, a supplementary fuel supply pipeline and an organic waste liquid supply pipeline; the waste gas supply pipeline is provided with a waste gas preheater; the primary air supply pipeline is provided with a primary air preheater.
The secondary air preheater is connected with a secondary air supply pipeline; the secondary air supply pipeline provides secondary air for the reduction section through a first secondary air supply pipe, and the secondary air supply pipeline provides secondary air for the oxidation section through a second secondary air supply pipe.
At least 1 ammonia spraying pipeline is arranged in the oxidation section.
The combustion gas in the incinerator contains a large amount of carbon monoxide, the rate of converting the carbon monoxide into the carbon dioxide is slow, and in order to achieve high destruction rate of hydrocarbon and improve the ratio of converting the carbon monoxide into the carbon dioxide, enough oxygen needs to be introduced into the incinerator. However, excessive oxygen and fuel are easily introduced into the incineratorProduce a large amount of heating power type nitrogen oxides in burning the stove, the utility model discloses a will burn burning furnace and cut apart into reduction section and oxidation section to set up SCR denitrification facility at the rear end, can enough reduce the content of burning the outer carbon monoxide of discharging fume of stove in, can reduce NO againXThe content of (a).
Wherein the reduction stage is a fuel-rich stage, the amount of oxygen is maintained below the theoretical amount of fuel, the hydrocarbon produces a large amount of carbon monoxide, and the nitrogen in the gas is not converted to NO in a large amountX(ii) a The oxidation section converts CO into CO by controlling the temperature2And preventing thermal NO by controlling the temperature not to be excessively highXAnd (4) generating. Then, the subsequent arrangement of an SCR denitration device enables NO in the flue gasXThe content is effectively reduced.
The utility model discloses a waste gas preheater, primary air preheater and overgrate air preheater's setting has reduced the demand to supplementary fuel, guarantees the stability of the interior temperature of incinerator. Wherein the supplementary fuel supply line is used for supplementing the shortage of the organic waste liquid.
The waste gas supply pipeline provides at least 1 kind of VOC waste gas of this field conventionality for burning furnace. The organic waste liquid supply line supplies at least 1 kind of organic waste liquid, which is conventional in the art, to the incinerator. The supplementary fuel supply line supplies at least 1 kind of supplementary fuel conventionally used for the incinerator to prevent the temperature fluctuation of the incinerator due to the insufficient supply of the organic waste liquid.
The utility model discloses a flue gas that the burning furnace produced flows through the overgrate air pre-heater, not only preheats for the overgrate air and provides the heat, can also reduce the consumption of external resource.
The utility model discloses the setting of ammonia pipeline is spouted in the oxidation section, can realize the SNCR denitration to gaseous in the oxidation section. The ammonia injection line can introduce the ammonia water into the oxidation section in a manner including, but not limited to, injection, and one skilled in the art can select a suitable injection device as desired. The ammonia injection pipeline can realize 40-60% of denitration efficiency in the oxidation section. The denitration can be effectively realized by matching with the arrangement of the SCR denitration device.
Preferably, the waste heat boiler comprises a superheater, an evaporator and an economizer which are arranged in sequence.
The flue gas that burns burning furnace production flows through over heater, evaporimeter, economizer and SCR denitrification facility in proper order.
The utility model discloses a flue gas that the burning furnace produced is burnt in messenger flows through over heater, evaporimeter and economizer in proper order, has improved the heat utilization rate that burns the burning furnace flue gas, and the steam that the evaporimeter produced lets in the over heater and can produce superheated steam, can also let in waste gas preheater and once wind preheater, provides the heat of preheating for waste gas and a wind.
Preferably, the device system for the co-treatment of the VOC waste gas and the organic waste liquid further comprises a temperature control device.
Preferably, the temperature control device comprises an industrial personal computer, a first control valve, a second control valve and a temperature measuring part; the first control valve is arranged on an exhaust gas supply pipeline; the second control valve is arranged on the second secondary air supply pipe; the temperature measuring part is used for measuring the temperature in the oxidation section; and the industrial personal computer adjusts the opening degrees of the first control valve and the second control valve according to the data measured by the temperature measuring part.
The temperature measuring part is used for measuring the temperature in the oxidation section, and when the temperature is lower than a set value, the industrial personal computer controls the opening of the first control valve, so that the waste gas supply amount of the waste gas supply pipeline is increased, and the temperature in the incinerator is increased; and when the temperature is higher than the set value, the industrial personal computer controls the opening degree of the second control valve, and the temperature of the oxidation section is reduced by introducing excessive secondary air. The utility model makes the ammonia and NO introduced by the ammonia spraying pipeline through the arrangement of the temperature control deviceXReaction to reduce NO in flue gasXContent, not oxidized to NOX。
The utility model discloses first control valve is the conventional control flap in this area, and the skilled person in this area can rationally select as required.
The second control valve is a conventional control valve in the field, and the second control valve can be reasonably selected by a person skilled in the art according to the requirement.
Preferably, the temperature measuring part is a thermocouple or a thermal resistor.
Preferably, the device system for the co-processing of the VOC waste gas and the organic waste liquid also comprises a boiler water supply pipeline;
and the boiler water supply pipeline sequentially flows through the economizer and the evaporator and is respectively and independently connected with the superheater, the waste gas preheater and the primary air preheater.
Preferably, the ammonia injection pipeline comprises a first ammonia injection pipeline and a second ammonia injection pipeline.
Preferably, the first ammonia spraying pipeline is arranged at the front end of the oxidation section; the second ammonia spraying pipeline is arranged at the rear end of the oxidation section.
The utility model discloses a first ammonia pipeline of spouting and the second spout ammonia pipeline in coordination set up, guaranteed the effect of SNCR denitration in the oxidation zone, make the SNCR denitration efficiency of oxidation zone stably maintain 40-60%.
Preferably, the end of the organic waste liquid supply pipeline is provided with a waste liquid nozzle; the waste liquid nozzle is used for spraying the organic waste liquid into the reduction section.
Preferably, the device system for the co-treatment of the VOC waste gas and the organic waste liquid also comprises a chimney; the purified flue gas treated by the SCR denitration device flows into a chimney to be discharged.
Compared with the prior art, the utility model discloses following beneficial effect has at least:
(1) the utility model discloses a will burn burning furnace and cut apart into reduction section and oxidation section to set up SCR denitrification facility in the rear end, can enough reduce the content of carbon monoxide in the outer exhaust gas of burning furnace, can reduce NO againXThe content of (A);
(2) the utility model reduces the need of fuel supplement and ensures the stability of the temperature in the incinerator through the arrangement of the waste gas preheater, the primary air preheater and the secondary air preheater;
(3) the utility model discloses the setting of spraying ammonia pipeline in the oxidation section can realize the SNCR denitration of gas in the oxidation section, the setting of spraying ammonia pipeline can realize 40-60% denitration efficiency in the oxidation section, cooperates with the setting of SCR denitrification facility, can effectively realize the denitration;
(4) the utility model improves the heat utilization rate of the flue gas of the incinerator by enabling the flue gas generated by the incinerator to sequentially flow through the superheater, the evaporator and the economizer, and the steam generated by the evaporator can be introduced into the superheater to generate superheated steam and can also be introduced into the waste gas preheater and the primary air preheater to provide preheating heat for the waste gas and the primary air;
(5) the utility model makes the ammonia and NO introduced by the ammonia spraying pipeline through the arrangement of the temperature control deviceXReaction to reduce NO in flue gasXContent, not oxidized to NOX。
Drawings
Fig. 1 is the utility model provides a structural schematic diagram of the device system of VOC waste gas and organic waste liquid coprocessing.
In the figure: 11, an exhaust gas supply line; 12, a primary air supply pipeline; 13, a supplementary fuel supply line; 14, an organic waste liquid supply pipeline; 15, secondary air supply pipeline; 151, a first secondary air supply pipe; 152, a second secondary air supply pipe; 16, boiler feed water line; 21, a reduction section; 22, an oxidation section; 31, a waste gas preheater; 32, primary air preheater; 33, a secondary air preheater; 34, a superheater; 35, an evaporator; 36, an economizer; 41, a first ammonia spraying pipeline; 42, a second ammonia injection pipeline; 51, an industrial personal computer; 52, a temperature measuring part; 53, a first control valve; 54, a second control valve; 6, an SCR denitration device; and 7, a chimney.
The present invention will be described in further detail below. However, the following examples are only simple examples of the present invention, and do not represent or limit the scope of the present invention, which is defined by the appended claims.
Detailed Description
To better illustrate the present invention, facilitating the understanding of the technical solutions of the present invention, typical but not limiting embodiments of the present invention are as follows:
example 1
The embodiment provides a device system for the co-processing of VOC waste gas and organic waste liquid as shown in fig. 1, which comprises an incinerator, a waste gas preheater 31, a primary air preheater 32, a secondary air preheater 33, a waste heat boiler, an SCR denitration device 6 and a chimney 7.
The waste heat boiler comprises a superheater 34, an evaporator 35 and an economizer 36 which are arranged in sequence.
The flue gas generated by the incinerator sequentially flows through a superheater 34, an evaporator 35, an economizer 36, an SCR denitration device 6 and a chimney 7.
The incinerator comprises a reduction section 21 and an oxidation section 22, wherein the reduction section 21 is respectively and independently connected with an exhaust gas supply pipeline 11, a primary air supply pipeline 12, a supplementary fuel supply pipeline 13 and an organic waste liquid supply pipeline 14; the exhaust gas supply line 11 is provided with an exhaust gas preheater 31; the primary air supply line 12 is provided with a primary air preheater 32.
The secondary air preheater 33 is connected with a secondary air supply pipeline 15; the secondary air supply line 15 supplies secondary air to the reduction stage 21 through a first secondary air supply pipe 151, and the secondary air supply line 15 supplies secondary air to the oxidation stage 22 through a second secondary air supply pipe 152.
The device system for the synergistic treatment of the VOC waste gas and the organic waste liquid also comprises a boiler water supply pipeline 16; the boiler feed water line 16 passes through the economizer 36 and the evaporator 35 in this order, and is independently connected to the superheater 34, the exhaust gas preheater 31, and the primary air preheater 32.
A first ammonia spraying pipeline 41 and a second ammonia spraying pipeline 42 are arranged in the oxidation section 22; the first ammonia spraying pipeline 41 is arranged at the front end of the oxidation section 22; the second ammonia injection pipe 42 is arranged at the rear end of the oxidation section 22.
The device system for the synergistic treatment of the VOC waste gas and the organic waste liquid further comprises a temperature control device, wherein the temperature control device comprises an industrial personal computer 51, a first control valve 53, a second control valve 54 and a temperature measuring part 52; the first control valve 53 is provided in the exhaust gas supply line 11; the second control valve 54 is arranged on the second secondary air supply pipe 152; the temperature measuring part 52 is used for measuring the temperature in the oxidation section 22; the industrial personal computer 51 regulates the opening degree of the first control valve 53 and the second control valve 54 according to the data measured by the temperature measuring part 52; the temperature measuring part 52 is a thermocouple or a thermal resistor.
In the present embodiment, the incinerator is divided into the reduction section 21 and the oxidation section 22, and the SCR denitration device 6 is provided at the rear end, whereby the content of carbon monoxide in the flue gas discharged from the incinerator can be reduced, and NO can be reducedXThe content of (A); specifically, the reduction section 21 is a fuel-rich section in which the amount of oxygen is maintained below the theoretical amount calculated for the fuel, and the hydrocarbons produce a large amount of carbon monoxide without substantial conversion of nitrogen in the gas to NOX(ii) a The oxidation stage 22 converts CO to CO by controlling the temperature2And preventing thermal NO by controlling the temperature not to be excessively highXGenerating; then, the arrangement of the SCR denitration device 6 enables NO in the flue gasXThe content is effectively reduced.
The temperature measuring part 52 is used for measuring the temperature in the oxidation section 22, and when the temperature is lower than a set value, the industrial personal computer 51 controls the opening of the first control valve 53, so that the waste gas supply amount of the waste gas supply pipeline 11 is increased, and the temperature in the incinerator is increased; when the temperature is higher than the set value, the industrial personal computer 51 controls the opening of the second control valve 54, and the temperature of the oxidation stage 22 is reduced by introducing excessive secondary air. The utility model makes the ammonia and NO introduced by the ammonia spraying pipeline through the arrangement of the temperature control deviceXReaction to reduce NO in flue gasXContent, not oxidized to NOX。
The first ammonia injection pipeline 41 and the second ammonia injection pipeline 42 are cooperatively arranged, so that the SNCR denitration effect in the oxidation section 22 is ensured, and the SNCR denitration efficiency of the oxidation section 22 is stably maintained at 40-60%.
To sum up, the utility model discloses a will burn burning furnace and cut apart into reduction section and oxidation section to set up SCR denitrification facility at the rear end, can enough reduce the content of burning furnace outer exhaust gas carbon monoxide in, can reduce NO againXThe content of (A); the utility model reduces the need of fuel supplement and ensures the stability of the temperature in the incinerator through the arrangement of the waste gas preheater, the primary air preheater and the secondary air preheater; the utility model discloses the setting of spraying ammonia pipeline in the oxidation section can realize the SNCR denitration to gaseous in the oxidation section, the setting of spraying ammonia pipeline can realize 40-60% denitration in the oxidation sectionThe efficiency is matched with the arrangement of an SCR denitration device, so that denitration can be effectively realized; the utility model improves the heat utilization rate of the flue gas of the incinerator by enabling the flue gas generated by the incinerator to sequentially flow through the superheater, the evaporator and the economizer, and the steam generated by the evaporator can be introduced into the superheater to generate superheated steam and can also be introduced into the waste gas preheater and the primary air preheater to provide preheating heat for the waste gas and the primary air; the utility model makes the ammonia and NO introduced by the ammonia spraying pipeline through the arrangement of the temperature control deviceXReaction to reduce NO in flue gasXContent, not oxidized to NOX。
The applicant states that the present invention is described by the above embodiments, but the present invention is not limited to the above detailed structural features, i.e. the present invention can be implemented only by relying on the above detailed structural features. It should be clear to those skilled in the art that any modifications to the present invention, to the equivalent replacement of selected parts and the addition of auxiliary parts, the selection of specific modes, etc., all fall within the scope of protection and disclosure of the present invention.
Claims (10)
1. The device system for the co-processing of the VOC waste gas and the organic waste liquid is characterized by comprising an incinerator, a waste gas preheater, a primary air preheater, a secondary air preheater, a waste heat boiler and an SCR (selective catalytic reduction) denitration device;
the flue gas generated by the incinerator sequentially flows through a waste heat boiler and an SCR denitration device;
the incinerator comprises a reduction section and an oxidation section, wherein the reduction section is respectively and independently connected with a waste gas supply pipeline, a primary air supply pipeline, a supplementary fuel supply pipeline and an organic waste liquid supply pipeline; the waste gas supply pipeline is provided with a waste gas preheater; the primary air supply pipeline is provided with a primary air preheater;
the secondary air preheater is connected with a secondary air supply pipeline; the secondary air supply pipeline provides secondary air for the reduction section through a first secondary air supply pipe, and the secondary air supply pipeline provides secondary air for the oxidation section through a second secondary air supply pipe;
at least 1 ammonia spraying pipeline is arranged in the oxidation section.
2. The device system for the co-treatment of VOC waste gas and organic waste liquid according to claim 1, wherein said waste heat boiler comprises a superheater, an evaporator and an economizer which are arranged in sequence;
the flue gas that burns burning furnace production flows through over heater, evaporimeter, economizer and SCR denitrification facility in proper order.
3. The device system for the co-treatment of VOC waste gas and organic waste liquid as claimed in claim 1, wherein said device system for the co-treatment of VOC waste gas and organic waste liquid further comprises a temperature control device.
4. The device system for the synergistic treatment of the VOC waste gas and the organic waste liquid as claimed in claim 3, wherein the temperature control device comprises an industrial personal computer, a first control valve, a second control valve and a temperature measuring part; the first control valve is arranged on an exhaust gas supply pipeline; the second control valve is arranged on the second secondary air supply pipe;
the temperature measuring part is used for measuring the temperature in the oxidation section; and the industrial personal computer adjusts the opening degrees of the first control valve and the second control valve according to the data measured by the temperature measuring part.
5. The apparatus system for co-processing VOC waste gas and organic waste liquid as claimed in claim 4, wherein said temperature measuring means is a thermocouple or a thermal resistor.
6. The apparatus system for co-processing VOC waste gas and organic waste liquid as claimed in claim 2, wherein said apparatus system for co-processing VOC waste gas and organic waste liquid further comprises a boiler feed water line;
and the boiler water supply pipeline sequentially flows through the economizer and the evaporator and is respectively and independently connected with the superheater, the waste gas preheater and the primary air preheater.
7. The device system for the co-treatment of VOC waste gas and organic waste liquid of claim 1, wherein said ammonia injection pipeline comprises a first ammonia injection pipeline and a second ammonia injection pipeline.
8. The device system for the co-treatment of VOC waste gas and organic waste liquid of claim 7, wherein said first ammonia spraying pipeline is arranged at the front end of the oxidation section; the second ammonia spraying pipeline is arranged at the rear end of the oxidation section.
9. The apparatus system for co-processing VOC waste gas and organic waste liquid as claimed in claim 1, wherein the end of said organic waste liquid supply pipeline is provided with a waste liquid nozzle;
the waste liquid nozzle is used for spraying the organic waste liquid into the reduction section.
10. The device system for the co-treatment of VOC waste gas and organic waste liquid as claimed in claim 1, wherein said device system for the co-treatment of VOC waste gas and organic waste liquid further comprises a chimney;
the purified flue gas treated by the SCR denitration device flows into a chimney to be discharged.
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Effective date of registration: 20211213 Address after: 831300 East Industrial Park, the Xinjiang Uygur Autonomous Region economic and Technological Development Zone, No. 10077, No. 10077 Patentee after: XINJIANG XINYE ENERGY CHEMICAL Co.,Ltd. Address before: 210048 No.9 Bofu Road, Dachang street, Jiangbei new district, Nanjing City, Jiangsu Province Patentee before: NANJING NBE SCI & TECH CO.,LTD. |