CN220436529U - Nitrile chemical industry high nitrogen organic waste gas and clear liquid incineration system - Google Patents
Nitrile chemical industry high nitrogen organic waste gas and clear liquid incineration system Download PDFInfo
- Publication number
- CN220436529U CN220436529U CN202321784201.6U CN202321784201U CN220436529U CN 220436529 U CN220436529 U CN 220436529U CN 202321784201 U CN202321784201 U CN 202321784201U CN 220436529 U CN220436529 U CN 220436529U
- Authority
- CN
- China
- Prior art keywords
- air
- hydrocyanic acid
- acid tail
- tail gas
- clear liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000007789 gas Substances 0.000 title claims abstract description 100
- 239000007788 liquid Substances 0.000 title claims abstract description 44
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 31
- 239000010815 organic waste Substances 0.000 title claims abstract description 27
- 239000000126 substance Substances 0.000 title claims abstract description 23
- 150000002825 nitriles Chemical class 0.000 title claims abstract description 20
- LELOWRISYMNNSU-UHFFFAOYSA-N hydrogen cyanide Chemical compound N#C LELOWRISYMNNSU-UHFFFAOYSA-N 0.000 claims abstract description 149
- 239000007921 spray Substances 0.000 claims abstract description 32
- 239000000428 dust Substances 0.000 claims abstract description 31
- 239000002918 waste heat Substances 0.000 claims abstract description 30
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 50
- 239000003546 flue gas Substances 0.000 claims description 48
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 12
- 238000005507 spraying Methods 0.000 claims description 8
- 229910021529 ammonia Inorganic materials 0.000 claims description 5
- 238000004880 explosion Methods 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 16
- BTGRAWJCKBQKAO-UHFFFAOYSA-N adiponitrile Chemical compound N#CCCCCC#N BTGRAWJCKBQKAO-UHFFFAOYSA-N 0.000 abstract description 14
- 238000010531 catalytic reduction reaction Methods 0.000 abstract description 5
- 238000006722 reduction reaction Methods 0.000 abstract description 5
- 230000009467 reduction Effects 0.000 abstract description 4
- 238000009841 combustion method Methods 0.000 abstract description 3
- 238000000746 purification Methods 0.000 abstract description 2
- 239000004744 fabric Substances 0.000 abstract 1
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 33
- 238000002485 combustion reaction Methods 0.000 description 20
- 239000002912 waste gas Substances 0.000 description 20
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 12
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- 239000002699 waste material Substances 0.000 description 8
- 238000009826 distribution Methods 0.000 description 7
- 239000003638 chemical reducing agent Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000003786 synthesis reaction Methods 0.000 description 5
- 238000000354 decomposition reaction Methods 0.000 description 4
- 239000003345 natural gas Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000007664 blowing Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000004200 deflagration Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 238000005669 hydrocyanation reaction Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 231100000331 toxic Toxicity 0.000 description 3
- 230000002588 toxic effect Effects 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- RLSSMJSEOOYNOY-UHFFFAOYSA-N m-cresol Chemical compound CC1=CC=CC(O)=C1 RLSSMJSEOOYNOY-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000002194 synthesizing effect Effects 0.000 description 2
- 229940008841 1,6-hexamethylene diisocyanate Drugs 0.000 description 1
- FPPLREPCQJZDAQ-UHFFFAOYSA-N 2-methylpentanedinitrile Chemical compound N#CC(C)CCC#N FPPLREPCQJZDAQ-UHFFFAOYSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- 206010021143 Hypoxia Diseases 0.000 description 1
- 229920000305 Nylon 6,10 Polymers 0.000 description 1
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 238000004176 ammonification Methods 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 210000000748 cardiovascular system Anatomy 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006471 dimerization reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000000653 nervous system Anatomy 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 125000001477 organic nitrogen group Chemical group 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- ISBHMJZRKAFTGE-UHFFFAOYSA-N pent-2-enenitrile Chemical compound CCC=CC#N ISBHMJZRKAFTGE-UHFFFAOYSA-N 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 239000008234 soft water Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
Abstract
The utility model provides a nitrile chemical industry high nitrogen organic waste gas and clear liquid incineration system, which comprises an incinerator and a waste heat boiler which are connected in sequenceFurnace, SCR denitration device, high-temperature economizer, cloth bag dust remover and low-temperature economizer; the lower part of the incinerator is provided with an SNCR spray gun interface, and an SCR spray gun interface is arranged on an outlet flue of the waste heat boiler; the incinerator comprises a vertical cylindrical furnace body, a hydrocyanic acid tail gas main pipe, an air main pipe, a top air annular channel, two layers of hydrocyanic acid tail gas and air jacket type annular channels and two layers of air annular channels. The system generates a large amount of NO aiming at the incineration of adiponitrile item high-nitrogen organic waste gas and clear liquid X The characteristics of the adiponitrile high-nitrogen organic waste gas are that the stratified and multi-channel injection is adopted to enter a hearth, the upper part is reduced, the middle and upper part is oxidized, the low-nitrogen combustion method is used for carrying out the reduction, the selective non-catalytic reduction method (SNCR) +the selective catalytic reduction method (SCR) is used for leading the organic removal rate to reach 99.9 percent, and the NO is formed X The purification efficiency reaches more than 99 percent.
Description
Technical Field
The utility model relates to a waste gas and waste liquid incineration technology, in particular to a nitrile chemical industry high-nitrogen organic waste gas and clear liquid incineration system.
Background
Adiponitrile is an important intermediate in organic chemical industry, is mainly used for synthesizing nylon 66, can be used for producing 1, 6-hexamethylene diisocyanate, nylon 610 and other materials, and has important application in the fields of electronics, light industry and organic synthesis.
At present, the production process routes of adiponitrile mainly comprise an acrylonitrile electrolytic dimerization method, an adipic acid catalytic ammonification method, a butadiene hydrocyanation method and the like. The currently relatively mainstream production process in the world is the butadiene hydrocyanation method, and compared with the former two processes, the production process is relatively energy-saving, reduces the power consumption, and has more competitive advantage in terms of cost. The production process for synthesizing adiponitrile by a butadiene hydrocyanation method mainly comprises hydrocyanic acid synthesis and adiponitrile synthesis, wherein hydrocyanic acid synthesis waste gas is cyanide-containing waste gas, and main pollutants are HCN and NH3; adiponitrile synthesis waste gas is organic waste gas, and main pollutants are HCN, butadiene, cyclohexane, pentenenitrile, adiponitrile, methylglutaronitrile, m-cresol and the like. Hydrogen cyanide is the most dangerous by-product, has strong toxicity and volatility, is easily absorbed by human body, can damage respiratory tract, nervous system and cardiovascular system, and even can cause death at high concentration. Therefore, if the waste gas and waste liquid are directly discharged, the environmental pollution can be caused, the ecological balance is destroyed, and the health of human bodies is directly damaged. Therefore, a reasonable and efficient treatment method for adiponitrile waste gas and waste liquid is found, and the method has important significance in promoting the environmental protection and the sustainable development of petrochemical industry.
At present, adiponitrile waste gas and waste liquid have the best incineration treatment effect, but have the difficulty that organic matters in the waste gas and waste liquid contain CN-type substances, belong to fuel type organic nitrogen, and are easy to convert to generate NO in the high-temperature combustion process X The pollutants, if not thoroughly treated, can hardly reach the national environmental protection standard.
Therefore, the design of the incinerator is particularly important, the form of charging waste gas, waste liquid and air is required to be reasonably arranged, the burning temperature is controlled, and NO is avoided X The content is too high, and organic matters in the waste gas and the waste liquid are thoroughly burnt. And reasonably selecting a flue gas treatment system, and purifying the flue gas to reach the emission standard.
Disclosure of Invention
The utility model aims to solve the problem of the difficult incineration treatment of adiponitrile and provides a system for incinerating high-nitrogen organic waste gas and clear liquid in the nitrile chemical industry, which generates a large amount of NO in the incineration of the high-nitrogen organic waste gas and clear liquid of adiponitrile X The characteristics of the method are that the incinerator adopts a layered and multi-runner design, the adiponitrile high-nitrogen organic waste gas can be sprayed into a hearth in a layered and multi-runner way, the method of combining a low-nitrogen combustion method, a selective non-catalytic reduction method (SNCR) and a selective catalytic reduction method (SCR) which are used for oxidizing the upper part of the incinerator in the upper part of the incinerator, so that the organic matter removal rate can reach 99.9%, and NO is formed X The purification efficiency reaches more than 99 percent. Namely, the adiponitrile high-nitrogen organic waste gas needs to pass through the waste gas and clear liquid incineration device system (incinerator low-nitrogen combustion+SNCR denitration+waste heat boiler+SCR denitration)A nitre device, a high-temperature economizer, a bag-type dust collector, a low-temperature economizer, an induced draft fan and a chimney).
In order to achieve the above purpose, the utility model adopts the following technical scheme: a nitrile chemical industry high nitrogen organic waste gas and clear liquid incineration system comprises an incinerator, a waste heat boiler, an SCR denitration device, a high-temperature economizer, a bag-type dust remover, a low-temperature economizer, an induced draft fan and a chimney which are connected in sequence; an SNCR spray gun interface is arranged at the lower outlet of the incinerator, and an SCR spray gun interface is arranged on the exhaust-heat boiler outlet flue;
the incinerator comprises a vertical cylindrical furnace body, a hydrocyanic acid tail gas main pipe, an air main pipe, a top air annular channel, two layers of hydrocyanic acid tail gas and air jacket type annular channels and two layers of air annular channels, wherein the top air annular channel is arranged at the top of the cylindrical furnace body and is used for supporting combustion by three combined combustors; the two layers of hydrocyanic acid tail gas and air jacket type annular channels and the two layers of air annular channels are arranged on the side wall of the cylindrical furnace body, and the hydrocyanic acid tail gas and air jacket type annular channels are positioned above the air annular channels; the hydrocyanic acid tail gas main pipe is communicated with two layers of hydrocyanic acid tail gas and an inner annular channel of the air jacket type annular channel, and the hydrocyanic acid tail gas enters a space between jacket type nozzle pipes arranged on a furnace wall through the hydrocyanic acid tail gas and the inner annular channel of the air jacket type annular channel and is sprayed into a hearth; the air main pipe is respectively communicated with the top air annular channel, the outer annular channel of the two layers of hydrocyanic acid tail gas and air jacket type annular channels and the two layers of air annular channels; a certain proportion of combustion air enters the hearth from the combined burner through the top air annular channel; the combustion air with a certain proportion enters a jacketed nozzle pipe arranged on a furnace wall through two layers of hydrocyanic acid tail gas and an outer annular channel of an air jacketed annular channel to be sprayed into a hearth; the combustion air with a certain proportion enters the hearth through the nozzles of the two-layer air annular channels.
Further, the top of the vertical cylindrical furnace body is provided with a combined burner, the combined burner comprises an exhaust gas spray gun, a natural gas spray gun and a clear liquid atomizing spray gun, and the bottom of the vertical cylindrical furnace body is provided with a smoke outlet.
Further, the incinerator further comprises two combustion-supporting fans, the two combustion-supporting fans are arranged beside the cylindrical furnace body and are communicated with the air main pipe, the two combustion-supporting fans are opened and prepared, and the air pressure of the outlet of the fan is 3-4 kpa (G).
Further, butterfly valves, expansion joints and pressure gauges are respectively arranged on the hydrocyanic acid tail gas and air inlets of each layer of hydrocyanic acid tail gas and air jacket type annular channel and are used for controlling the air inlet flow of each layer of annular channel. And the inlet of each layer of air annular channel is provided with a butterfly valve, an expansion joint and a pressure gauge, and the butterfly valve, the expansion joint and the pressure gauge are used for controlling the air flow of each layer of annular channel. The top air annular channel inlet is provided with a butterfly valve, an expansion joint and a pressure gauge, and is used for controlling the air flow rate of the top supplied combined burner.
Further, 20-30 hydrocyanic acid tail gas and air nozzles are uniformly distributed on the vertical cylindrical furnace body wall body through the hydrocyanic acid tail gas and air jacket type annular channels, the nozzles are in jacket type, the hydrocyanic acid tail gas main pipe is communicated with two layers of hydrocyanic acid tail gas and the air jacket type annular channel inner layer annular channels, the air main pipe is communicated with two layers of hydrocyanic acid tail gas and the air jacket type annular channel outer layer annular channels, and the air is arranged in the jacket type nozzle pipe, the hydrocyanic acid tail gas is arranged between the jacket type nozzle pipes, so that turbulent mixing of the hydrocyanic acid tail gas and air is facilitated, and the purpose of fully burning the hydrocyanic acid tail gas is achieved.
Further, the flow areas of each layer of annular channel and the nozzles of the hydrocyanic acid tail gas and the air jacket type annular channel are different, the area of the upper layer is larger than that of the lower layer, the spraying speed is ensured to be consistent, the reaction is uniform, and the full decomposition of toxic components is facilitated.
Further, 8-10 air nozzles are respectively arranged in the air annular channels, and a proper amount of air is supplied to the hearth to control the combustion temperature and inhibit NO X Is generated.
Further, because the hydrocyanic acid tail gas has low heat value and cannot be spontaneously combusted, a plurality of (preferably 3) combined combustors are arranged at the top of the vertical cylindrical furnace body hearth so as to ensure that the combustion temperature of the hydrocyanic acid tail gas is not too high and can be fully decomposed. The combined burner is positioned at the top of the vertical cylindrical furnace body, clear liquid is connected with a clear liquid atomizing spray gun in the combined burner, and waste gas and natural gas are connected with spray guns corresponding to the combined burner.
Further, the gravity type explosion door is arranged on the side face of the upper portion of the vertical cylindrical furnace body, so that the incinerator is prevented from being damaged by deflagration caused by combustion safety faults, and the operation safety of the incinerator is improved.
Further, the equipment of the incineration system and the inlet and outlet of the equipment are provided with corresponding temperature and pressure measuring points, so that real-time on-line monitoring is realized. For example, the flue gas outlet of the incinerator is provided with a pressure measuring point and a temperature measuring point so as to monitor the combustion temperature and pressure of the incinerator in real time.
Further, the side wall of the vertical cylindrical furnace body is provided with reinforcing ribs; and a manhole is arranged at the lower end of the side wall of the vertical cylindrical furnace body.
Further, the circulation multiplying power of the whole loop of the waste heat boiler is larger than 50, and the reliability of boiler water circulation is ensured. The steam drum is internally provided with a steam-homogenizing hole plate, a gap type steam-water separator, a jet type water supply distribution pipe and a continuous blow-down pipe to improve the steam quality, so that the water content of the steam of the boiler is far less than 1%.
Further, the incineration system adopts a low-nitrogen combustion method to reduce the generation of NOx in the incineration flue gas, and adopts a selective non-catalytic reduction method (SNCR) to remove the NOx in the flue gas.
Further, the denitration reducing agent is guaranteed to enter the SCR denitration device to be uniformly mixed with the flue gas, and a flue gas guide plate and an ammonia spraying grid layer are sequentially arranged behind a flue gas inlet SCR spray gun interface of the SCR denitration device.
Further, a high-temperature expansion joint is arranged between the waste heat boiler and the SCR denitration device.
Further, a high-temperature economizer is arranged behind the SCR denitration device. Further, the bag-type dust collector adopts a low-voltage pulse bag-type dust collector. Further, a low-temperature economizer is arranged behind the bag-type dust collector.
Compared with the prior art, the nitrile chemical industry high-nitrogen organic waste gas and clear liquid incineration system has the following advantages:
1. the incinerator adopts a top burning mode and a side burning mode. The hydrocyanic acid tail gas incineration amount is relatively large, and the top incineration is easy to blow out flame, so that the incineration is performed by adopting a mode of multipoint air inlet on the side surface of the upper part of the incinerator. Other waste gases are sprayed into the incinerator for incineration by a waste gas spray gun in the top combined combustor in a top burning mode. The clear liquid is also in a top burning mode, and is atomized by compressed air by a clear liquid atomizing spray gun in the top combined burner and then uniformly sprayed into a hearth for burning.
The upper part of the incinerator hearth is a reduction section. The reduction section controls the combustion-supporting air quantity to enable the waste gas and clear liquid to burn in an oxygen-deficient state, the mixed flue gas presents a reducing atmosphere, and nitrogen-containing substances such as HCN in the waste are subjected to oxygen deficiency to generate N during incineration 2 Without formation of NOx, i.e
2HCN+O 2 →2CO+H 2 +N 2
In order to make the reduction reaction strong and uniform, two layers of hydrocyanic acid tail gas and air jacket type annular channels are arranged at the upper part of the furnace body from top to bottom, so that the hydrocyanic acid tail gas and combustion air are sprayed into the hearth in a layered and multi-channel mode, a plurality of jacket type nozzles are uniformly arranged along the circumference from top to bottom, the air is conveyed into the jacket type nozzle pipes, and the hydrocyanic acid tail gas is conveyed between the jacket type nozzle pipes. The flow areas of each layer of annular channel and the spray nozzle are different, the area of the upper layer is larger than that of the lower layer, the spraying speed is ensured to be consistent, the reaction is uniform, and the full decomposition of toxic components is facilitated.
The middle upper part of the incinerator hearth is an oxidation section. The furnace body is provided with two layers of air annular channels from top to bottom, air is matched according to a certain air excess coefficient, carbon monoxide and hydrogen are burnt, the dry oxygen content and the burning temperature in the hearth are controlled, and N caused by overhigh temperature is avoided 2 Further oxidation to form NO X 。
The incinerator can organize a good air dynamic field, ensure complete incineration and decomposition of organic matters in organic waste gas and clear liquid through multistage air distribution, and reduce the generation of nitrogen oxides.
2. The temperature of the flue gas from the incinerator is more than or equal to 1100 ℃, then the flue gas enters a waste heat boiler arranged at the rear of the incinerator for flue gas cooling, and the waste heat of the flue gas is recovered to generate 2.5Mpa saturated steam for production and use.
The circulation multiplying power of the whole loop of the waste heat boiler is more than 50, so that the reliability of boiler water circulation is ensured. The steam drum is internally provided with a steam-homogenizing hole plate, a gap type steam-water separator, a jet type water supply distribution pipe and a continuous blow-down pipe to improve the steam quality, so that the water content of the steam of the boiler is far less than 1%.
3. In order to ensure ultralow emission of nitrogen oxides, a low-nitrogen combustion mode is adopted, an SNCR spray gun interface is arranged at an outlet of the incinerator, an SCR denitration device is arranged behind the waste heat boiler device, and NOx in the flue gas is further removed.
4. In order to ensure that the denitration reducing agent enters the SCR denitration device and is uniformly mixed with the flue gas, a flue gas guide plate and an ammonia spraying grid are sequentially arranged behind an SCR spray gun interface at a flue gas inlet of the SCR denitration device.
5. In order to ensure ultra-low emission of particulate matters, a bag-type dust remover is arranged behind the high-temperature economizer to collect dust in the flue gas and ensure that the emission of the dust content of the flue gas reaches the standard. The bag-type dust collector 15 adopts a low-pressure pulse bag dust collector which has a high-efficiency bag dust collector of the advanced level of twenty-first century. It integrates the advantages of the chamber-separating back blowing and the blowing pulse ash-cleaning various bag dust collectors. Because the structure of the dust collector has the characteristics, the dust collection efficiency is improved, and the service life of the filter bag is prolonged.
6. In order to ensure the safety of the incineration system, two gravity type explosion-proof doors are arranged on the side surface of the upper part of the incinerator, so that the incinerator is ensured not to be damaged by the deflagration of the combustion safety failure, and the operation safety of the incinerator is improved. The equipment and the inlet and outlet of the equipment of the incineration environment-friendly treatment system are provided with corresponding temperature and pressure measuring points, so that real-time on-line monitoring is realized.
7. A high-temperature expansion joint is arranged between the waste heat boiler and the SCR denitration device, and the thermal expansion quantity of equipment is absorbed, so that the safe operation of the system is ensured.
8. After the high-temperature coal economizer is positioned in the SCR denitration device, the flue gas at about 350 ℃ exchanges heat with deoxidized water, the deoxidized water temperature is raised to about 195 ℃ and enters a waste heat boiler system. The low-temperature economizer is positioned behind the bag-type dust collector, and the flue gas exchanges heat with boiler feed water (soft water temperature is about 75 ℃), so that the temperature of the boiler feed water is increased to about 99 ℃ and enters the deaerator. The system is provided with the high-temperature economizer and the low-temperature economizer, fully utilizes the waste heat of the flue gas, reduces the exhaust gas temperature of the flue gas, saves energy and improves the efficiency of the boiler.
Drawings
FIG. 1 is a flow chart of a nitrile chemical industry high nitrogen organic waste gas and clear liquid incineration system.
Detailed Description
The utility model is further illustrated by the following examples:
example 1
The embodiment discloses a nitrile chemical industry high-nitrogen organic waste gas and clear liquid incineration system, which is shown in fig. 1 and comprises an incinerator 1, a waste heat boiler 8, an SCR denitration device 13, a high-temperature economizer 14, a bag-type dust remover 15, a low-temperature economizer 17, an induced draft fan 18 and a chimney 19 which are connected in sequence; an SNCR spray gun interface 7 is arranged at the lower outlet of the incinerator 1, an SCR spray gun interface 9 is arranged at the outlet flue of the waste heat boiler 8, an SCR denitration device 13 is arranged behind the waste heat boiler 8, and NOx in the flue gas is further removed;
the incinerator 1 comprises a vertical cylindrical furnace body, a hydrocyanic acid tail gas main pipe 2, an air main pipe 6, a top air annular channel, two layers of hydrocyanic acid tail gas and air jacket type annular channels 5 and two layers of air annular channels, wherein the top air annular channel is arranged at the top of the cylindrical furnace body and is used for supporting combustion by three combined combustors; the two layers of hydrocyanic acid tail gas and air jacket type annular channels 5 and the two layers of air annular channels are arranged on the side wall of the cylindrical furnace body, and the hydrocyanic acid tail gas and air jacket type annular channels 5 are positioned above the air annular channels; the hydrocyanic acid tail gas main pipe 2 is communicated with two layers of hydrocyanic acid tail gas and an inner annular channel of the air jacket type annular channel 5, and the hydrocyanic acid tail gas enters a space between jacket type nozzle pipes in the incinerator through the hydrocyanic acid tail gas and the inner annular channel of the air jacket type annular channel 5 and is sprayed into the hearth; the air main pipe 6 is respectively communicated with the top air annular channel, the two layers of hydrocyanic acid tail gas, the outer annular channel of the air jacket type annular channel 5 and the two layers of air annular channels, and combustion air enters the hearth through the top air annular channel, the two layers of hydrocyanic acid tail gas, the outer annular channel of the air jacket type annular channel 5 and the two layers of air annular channels according to a certain proportion through the air main pipe 6; the incinerator adopts a top burning mode and a side burning mode. The hydrocyanic acid tail gas incineration amount is relatively large, and the incineration is carried out by adopting a mode of multipoint air inlet on the side surface of the upper part of the incinerator. Other waste gases are sprayed into the incinerator for incineration by a waste gas spray gun in the top combined combustor 4 in a top burning mode. The clear liquid is also in a top burning mode, and is atomized by compressed air by a clear liquid atomizing spray gun in the top combined burner 4 and then uniformly sprayed into a hearth for burning.
The top of the vertical cylindrical furnace body is provided with a combined burner 4 which comprises a natural gas spray gun, a waste gas spray gun, a clear liquid atomizing spray gun and the like, and the bottom of the vertical cylindrical furnace body is provided with a smoke outlet.
The incinerator 1 further comprises two combustion-supporting fans, the two combustion-supporting fans are arranged beside the cylindrical furnace body and are communicated with the air main pipe, the two combustion-supporting fans are one on each other, and the air pressure of the outlet of the fan is 3-4 kpa (G).
Each layer of hydrocyanic acid tail gas and air jacket type annular channel 5 is provided with a butterfly valve, an expansion joint and a pressure gauge, and is used for controlling the air inlet flow of each layer of annular channel. And the inlet of each layer of air annular channel is provided with a butterfly valve, an expansion joint and a pressure gauge, and the butterfly valve, the expansion joint and the pressure gauge are used for controlling the air flow of each layer of annular channel. The top air annular channel inlet is provided with a butterfly valve, an expansion joint and a pressure gauge, and is used for controlling the air flow entering each combined burner.
The hydrocyanic acid tail gas and the air jacket type annular channel 5 are uniformly distributed with 20-30 hydrocyanic acid tail gas and air nozzles on the vertical cylindrical furnace body wall, the nozzles are in a jacket type, the hydrocyanic acid tail gas main pipe 2 is communicated with two layers of hydrocyanic acid tail gas and the inner annular channel of the air jacket type annular channel 5, the air main pipe 6 is communicated with two layers of hydrocyanic acid tail gas and the outer annular channel of the air jacket type annular channel 5, the hydrocyanic acid tail gas and air enter the jacket type nozzles through the two layers of hydrocyanic acid tail gas and the air jacket type annular channel 5, the air is led to the inside of the jacket type nozzle pipe, and the hydrocyanic acid tail gas is led to the space among the jacket type nozzle pipes, so that the turbulent mixing of the hydrocyanic acid tail gas and the air is facilitated, and the purpose of fully burning the hydrocyanic acid tail gas is achieved.
The flow areas of each layer of annular channel and the spray nozzle of the hydrocyanic acid tail gas and the air jacket type annular channel 5 are different, the upper layer area is larger than the lower layer area, the spraying speed is ensured to be consistent, the reaction is uniform, and the full decomposition of toxic components is facilitated.
8-10 air nozzles are respectively arranged in the two layers of air annular channels, and a proper amount of air is supplied to the hearth to control the combustion temperature and inhibit NO X Is generated.
Because the hydrocyanic acid tail gas has low heat value and can not be spontaneously combusted, a plurality of (preferably 3) combined combustors 4 are arranged at the top of the vertical cylindrical furnace body, so that the combustion temperature of the hydrocyanic acid tail gas is ensured not to be too high and the hydrocyanic acid tail gas can be fully decomposed. The combined burner 4 is positioned at the top of the vertical cylindrical furnace body, clear liquid is connected with a clear liquid atomizing spray gun in the combined burner, and waste gas and natural gas are connected with spray guns corresponding to the combined burner.
The gravity type explosion door 3 is arranged on the side surface of the upper portion of the vertical cylindrical furnace body, so that the incinerator is prevented from being damaged by deflagration caused by combustion safety faults, and the operation safety of the incinerator is improved.
The incineration system is characterized in that each device and an inlet and an outlet of the device are provided with corresponding temperature and pressure measuring points, so that real-time online monitoring is realized. For example, the flue gas outlet of the incinerator is provided with a pressure measuring point and a temperature measuring point so as to monitor the combustion temperature and pressure of the incinerator in real time.
Reinforcing ribs are arranged on the side wall of the vertical cylindrical furnace body; and a manhole is arranged at the lower end of the side wall of the vertical cylindrical furnace body.
The circulation multiplying power of the whole loop of the waste heat boiler 8 is larger than 50, and the reliability of boiler water circulation is ensured. The steam drum is internally provided with a steam-homogenizing hole plate, a gap type steam-water separator, a jet type water supply distribution pipe and a continuous blow-down pipe to improve the steam quality, so that the water content of the steam of the boiler is far less than 1%.
In order to ensure that the denitration reducing agent enters the SCR denitration device 13 and is uniformly mixed with the flue gas, a flue gas guide plate 11 and an ammonia spraying grid 12 are sequentially arranged behind a flue gas inlet SCR denitration spray gun interface of the SCR denitration device 13.
A high-temperature expansion joint 10 is arranged between the waste heat boiler 8 and the SCR denitration device 13.
The high-temperature economizer 14 is arranged behind the SCR denitration device 13.
The bag-type dust collector 15 adopts a low-voltage pulse bag-type dust collector.
A low-temperature economizer 17 is arranged behind the bag-type dust collector 15.
The process flow of the nitrile chemical industry high nitrogen organic waste gas and clear liquid incineration system is as follows:
hydrocyanic acid tail gas enters a gap between the jacket type nozzle pipes through two layers of hydrocyanic acid tail gas and an air jacket type annular channel inner annular channel from the side surface of the upper part of the incinerator through a hydrocyanic acid tail gas main pipe, and then is sent into a hearth for incineration. Other waste gas and clear liquid enter the incinerator from the corresponding spray gun of the combined burner at the top of the incinerator for incineration.
The incinerator adopts graded air distribution, and the top and the upper part adopt under-oxygen incineration, so that the generation of nitrogen oxides is effectively inhibited. The middle upper part is supplemented with air to fully burn carbon monoxide, hydrogen and the like generated at the upper part.
The incinerator adopts a cylindrical structure, and the hearth has enough anti-explosion and anti-explosion capabilities. The furnace wall is also provided with necessary observation holes, temperature and pressure measurement holes, manholes and the like.
In order to ensure ultralow emission of nitrogen oxides, the system adopts a low-nitrogen combustion mode, an SNCR spray gun interface is arranged at the outlet of the bottom of the incinerator, an SCR denitration device is arranged behind the waste heat boiler, and reducing agents are respectively sprayed into NO in flue gas X Removal is performed.
The temperature of the flue gas from the incinerator is more than or equal to 1100 ℃, the flue gas enters a waste heat boiler arranged at the rear of the incinerator for cooling, and meanwhile, the waste heat of the flue gas is recovered to generate 2.5Mpa saturated steam for production and use.
The convection bank of the waste heat boiler is the main evaporation heating surface. Consists of a header and a tube bundle. The collecting box material is 20; the tube bundle is made of welded spiral fins of the tubes, which are arranged in line.
Desalted water is pumped to a low-temperature economizer through a desalted water supply pump, preheated and then sent to a deaerator, deoxidized and then pumped to a high-temperature economizer through a boiler water supply pump, deoxidized water enters a steam drum after heat exchange with flue gas in the high-temperature economizer, furnace water in the steam drum enters convection tube bundles of a waste heat boiler through a down pipe and a distribution pipe, steam-water mixture generated by heat exchange with the high-temperature flue gas is sent to the steam drum through an eduction pipe, saturated steam is separated from 2.5MPa in the steam drum through a steam-water separation device and then sent to a factory for use by various steam equipment.
The steam drum is internally provided with a steam-homogenizing pore plate, a gap type steam-water separator, a jet type water supply distribution pipe and a blow-down pipe to improve the steam quality, and the steam water content of the boiler can be less than 1%. The liquid level meter and the balance container interface are arranged on the steam drum, each interface can be connected with a remote water level display device, a high-low water level alarm, a high-high water level chain, a low-low water level chain and other users according to actual conditions, and the safe and reliable operation of the boiler is ensured.
The flue gas which is cooled by the waste heat boiler and is about 350 ℃ enters the SCR denitration device to produce NO X Further removal is carried out. In order to ensure that the denitration reducing agent enters the SCR denitration device and is uniformly mixed with the flue gas, a flue gas guide plate is arranged behind an SCR denitration spray gun interface of an inlet flue of the SCR denitration device, and an ammonia spraying grid is arranged behind the flue gas guide plate, so that the flue gas and the reducing agent are ensured to be fully mixed.
Considering that the thermal expansion amount generated by incineration is large, a high-temperature expansion joint is arranged between the waste heat boiler and the denitration device so as to ensure the safe operation of the system. The high-temperature expansion joint is a nonmetallic expansion joint, has the temperature resistance of-50-1200 ℃, can compensate axial, transverse and angular displacement, and has the characteristics of corrosion resistance, high temperature resistance, noise elimination, vibration reduction and the like.
The flue gas after denitration enters a high-temperature economizer to exchange heat with deoxidized water of a boiler, the deoxidized water is heated and then sent into a steam drum, the high-temperature economizer absorbs heat of the flue gas, the temperature of the flue gas entering the bag-type dust collector is reduced, energy is saved, and the efficiency of the boiler is improved
The flue gas is cooled to about 170 ℃ and enters a bag-type dust remover, and gas-solid separation is carried out in the bag-type dust remover.
The flue gas enters the bag-type dust collector, dust and particles in the flue gas are captured under the action of inertial collision through the filter bag of the bag-type dust collector, dust adhered on the bag is blown by the back blowing device at regular time, solid particles on the bag are blown down to fall into an ash bucket at the lower part of the bag-type dust collector, and the solid particles fall into the screw conveyor through the discharge valve to collect the dust.
The low-temperature economizer is a device which is arranged behind the bag-type dust collector and is used for recovering residual waste heat of flue gas, and the boiler water is fed into the deaerator after being heated, so that energy sources are saved.
The smoke gas which is treated by the environmental protection and reaches the standard and is at about 130 ℃ enters a chimney through a draught fan to be discharged into the atmosphere.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.
Claims (10)
1. The system for incinerating the nitrile chemical high-nitrogen organic waste gas and clear liquid is characterized by comprising an incinerator (1), a waste heat boiler (8), an SCR denitration device (13), a high-temperature economizer (14), a bag-type dust remover (15), a low-temperature economizer (17), an induced draft fan (18) and a chimney (19) which are connected in sequence; an SNCR spray gun interface (7) is arranged at the lower outlet position of the incinerator (1), and an SCR spray gun interface (9) is arranged on an outlet flue of the waste heat boiler (8);
the incinerator (1) comprises a vertical cylindrical furnace body, a hydrocyanic acid tail gas main pipe (2), an air main pipe (6), a top air annular channel, two layers of hydrocyanic acid tail gas and air jacket type annular channels (5) and two layers of air annular channels, wherein the top air annular channel is arranged at the top of the cylindrical furnace body; the two layers of hydrocyanic acid tail gas and air jacket type annular channels (5) and the two layers of air annular channels are arranged on the side wall of the cylindrical furnace body, and the hydrocyanic acid tail gas and air jacket type annular channels (5) are positioned above the air annular channels; the hydrocyanic acid tail gas main pipe (2) is communicated with two layers of hydrocyanic acid tail gas and an inner annular channel of the air jacket type annular channel (5); the air main pipe (6) is respectively communicated with the top air annular channel, the outer annular channel of the two-layer hydrocyanic acid tail gas and air jacket type annular channel (5) and the two-layer air annular channel.
2. The nitrile chemical high-nitrogen organic waste gas and clear liquid incineration system according to claim 1, further comprising two combustion-supporting fans, wherein the two combustion-supporting fans are arranged beside the cylindrical furnace body and are communicated with the air main pipe (6).
3. The nitrile chemical industry high nitrogen organic waste gas and clear liquid incineration system according to claim 1, wherein 20-30 hydrocyanic acid tail gas and air nozzles are uniformly distributed on the vertical cylindrical furnace body wall body through hydrocyanic acid tail gas and air jacket type annular channels (5), the nozzles are in a jacket type, and the hydrocyanic acid tail gas is arranged in an air pipe and between the hydrocyanic acid tail gas pipes.
4. The nitrile chemical high-nitrogen organic waste gas and clear liquid incineration system according to claim 1, wherein the flow areas of each layer of annular channel and the nozzles of the hydrocyanic acid tail gas and the air jacket type annular channel (5) are different.
5. The incineration system for nitrile chemical high-nitrogen organic waste gas and clear liquid according to claim 1, wherein 8-10 air nozzles are respectively arranged in the air annular channel.
6. The nitrile chemical high-nitrogen organic waste gas and clear liquid incineration system according to claim 1, is characterized in that a plurality of combined burners (4) are arranged on the top of a vertical cylindrical furnace body hearth.
7. The nitrile chemical high-nitrogen organic waste gas and clear liquid incineration system according to claim 1, wherein a gravity type explosion door (3) is arranged on the side surface of the upper part of the vertical cylindrical furnace body.
8. The incineration system for nitrile chemical high-nitrogen organic waste gas and clear liquid according to claim 1, wherein the incineration system is characterized in that the equipment and the inlet and outlet of the equipment are provided with corresponding temperature and pressure measuring points.
9. The nitrile chemical high-nitrogen organic waste gas and clear liquid incineration system according to claim 1, is characterized in that a flue gas guide plate (11) and a layer of ammonia spraying grid (12) are sequentially arranged behind a flue gas inlet SCR spray gun interface of an SCR denitration device (13).
10. The nitrile chemical high-nitrogen organic waste gas and clear liquid incineration system according to claim 1, wherein a high-temperature expansion joint (10) is arranged on a flue close to the waste heat boiler between the waste heat boiler (8) and the SCR denitration device (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321784201.6U CN220436529U (en) | 2023-07-07 | 2023-07-07 | Nitrile chemical industry high nitrogen organic waste gas and clear liquid incineration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321784201.6U CN220436529U (en) | 2023-07-07 | 2023-07-07 | Nitrile chemical industry high nitrogen organic waste gas and clear liquid incineration system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220436529U true CN220436529U (en) | 2024-02-02 |
Family
ID=89701907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321784201.6U Active CN220436529U (en) | 2023-07-07 | 2023-07-07 | Nitrile chemical industry high nitrogen organic waste gas and clear liquid incineration system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220436529U (en) |
-
2023
- 2023-07-07 CN CN202321784201.6U patent/CN220436529U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109458622B (en) | Environment-friendly energy-saving discharge system for incineration of acrylonitrile salt-containing organic waste liquid and waste gas | |
| CN104190253A (en) | Coke oven flue gas SCR denitration system | |
| CN102644922B (en) | Incineration treatment device for nitrogen-containing organic wastes and incineration treatment process | |
| CN112460604A (en) | Hazardous waste incineration flue gas treatment system and hazardous waste incineration flue gas treatment method | |
| CN204073849U (en) | Coke oven flue gas SCR denitration system | |
| CN107631308A (en) | A kind of system and method for high temperature incineration method processing acrylic nitrile waste water | |
| CN111637465B (en) | Treatment system and method for combustible industrial solid waste | |
| CN104759205A (en) | High-temperature air duct denitration reactor and method therewith for denitration | |
| CN102168857A (en) | High-concentration saliferous organic waste liquid incinerator and incineration technique | |
| CN104329946B (en) | A kind of coke oven flue exhaust gas denitration and the integral system of waste heat recovery | |
| CN220436529U (en) | Nitrile chemical industry high nitrogen organic waste gas and clear liquid incineration system | |
| CN218510911U (en) | High-concentration salt-containing waste liquid incinerator | |
| CN207527606U (en) | A kind of system of high temperature incineration method processing acrylic nitrile waste water | |
| CN220379691U (en) | Nitrile chemical industry high nitrogen organic waste gas waste liquid burns burning furnace | |
| CN113464953B (en) | System and method for efficiently reducing emission of nitrogen oxides by using garbage incineration | |
| CN114738770A (en) | Incineration treatment method and system for waste tar, waste gas and waste water | |
| CN212142070U (en) | Ammonia gas uniform distributor for SNCR denitration process | |
| CN211781141U (en) | Chemical acid gas treatment system | |
| CN210522267U (en) | Nitrogen oxide (NOx) discharging device of papermaking steam supply boiler | |
| CN108800168A (en) | A kind of three-stage organic nitrogen incinerator for waste liquid and burning process | |
| CN103398397A (en) | Combustion system of boiler and combustion method implemented by aid of system | |
| CN208475341U (en) | A kind of three-stage organic nitrogen incinerator for waste liquid | |
| CN202675299U (en) | Device for combusting nitrogen-containing organic wastes | |
| CN215001617U (en) | Contain organic waste liquid resource environmental protection processing system of high nitrogen phosphorus-containing adiponitrile of salt | |
| CN108286714A (en) | A kind of chemical waste liquid burning disposal method of comprehensive utilization and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |