CN216281438U - Dimethyl ether flash distillation waste gas oxidation treatment device - Google Patents
Dimethyl ether flash distillation waste gas oxidation treatment device Download PDFInfo
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model discloses a dimethyl ether flash evaporation waste gas oxidation treatment device, which comprises: a safe exhaust gas collection system; an exhaust gas safety treatment system; a waste heat recovery system; the waste gas safe collection system comprises a multi-stage absorption slow release unit, and the multi-stage absorption slow release unit is provided with a high-concentration dimethyl ether flash evaporation waste gas inlet pipeline and a nitrogen gas inlet pipeline; the waste gas safety treatment system comprises a gas injection unit and a negative pressure oxidation unit. The utility model adopts the multistage absorption slow release unit to replace an air bag/air cabinet in the prior art, has low investment cost, is an effective, low-cost and safe alternative mode, fully utilizes the mixing and dissolving characteristics of dimethyl ether and water, takes the water as an absorbent, can absorb water-soluble pollutants such as dimethyl ether, trimethylamine, alcohols and the like in waste gas, can be used as a buffer facility of flash evaporation instant high-concentration waste gas, performs peak clipping and valley filling, effectively solves the impact of the flash evaporation waste gas on a treatment system, and simultaneously realizes the regeneration of the absorbent without generating waste water.
Description
Technical Field
The utility model relates to the technical field of waste gas treatment, in particular to a dimethyl ether flash evaporation waste gas oxidation treatment device.
Background
Dimethyl ether (DME) is colorless gas or compressed liquid under normal pressure, has slight ether fragrance, has molecular weight of 46.07, melting point-141 deg.C, boiling point-29.5 deg.C and vapor pressure of about 0.5MPa at room temperature, is similar to liquefied petroleum gas, is soluble in water and various organic solvents such as alcohol, ether, acetone, chloroform, etc., has an explosion limit of 3.4-27%, can be mixed with air to form an explosive mixture, and can be easily combusted and exploded by contact with heat, sparks, flames or oxidants.
In the existing chemical production process, high-temperature and high-pressure reaction taking methanol as a solvent is often accompanied with the production of dimethyl ether, and for example, H acid is produced by a continuous method, a strand of high-concentration dimethyl ether waste gas is released in the flash evaporation process of an alkali fusion section, the organic waste gas is intermittently discharged, has large fluctuation, large instantaneous exhaust amount and extremely high concentration, contains a small amount of trimethylamine, has strong pungent smell, and is very easy to cause safety problems such as explosion and the like if the methanol is not properly treated.
At present, the high-concentration inflammable gas is generally discharged directly after being safely treated in the chemical production process, which not only harms human health, but also seriously affects the atmospheric environment due to a large amount of discharge, and is difficult to meet increasingly strict environmental protection requirements.
Generally, organic waste gas is treated by methods such as a condensation method, an absorption method, an adsorption method and a thermal incineration technology, wherein the condensation method, the absorption method and the adsorption method are commonly used for pretreatment or post-treatment of waste gas treatment, and the thermal incineration technology is the globally accepted method for treating organic waste gas at present, and has the characteristics of high removal efficiency, stable efficiency, long service life and the like.
The thermal incineration technology is divided into various types, including RCO, RTO, TO incinerators, etc., i.e., catalytic combustion method, regenerative combustion method, direct combustion method, etc. RCO and RTO are mainly suitable for burning waste gas with large air volume and medium and low concentration, the concentration of VOCs in the waste gas can not be too high, the waste gas is required to be controlled below 25% of the lower limit of the explosion limit, and the waste gas with high risk such as hydrogen, methane gas, ethylene oxide, dimethyl ether and the like is forbidden to be mixed, so that the RTO and the RCO are not suitable for treating high-concentration inflammable gas containing hydrogen, methane gas, ethylene oxide, dimethyl ether and the like.
The TO incinerator technology is used for directly introducing waste gas into a hearth TO be thoroughly incinerated, the concentration of the waste gas entering the incinerator is theoretically unlimited, the TO incinerator is suitable for treating waste gas with small air volume and high concentration, and waste gas with high dangerousness such as hydrogen, methane, dimethyl ether and the like can be incinerated, but flash evaporation waste gas has the characteristics of discontinuous intermittent discharge and extremely large fluctuation, and the TO incinerator is difficult TO maintain stable and efficient operation.
In the prior art, in order TO solve the problem that the intermittent discharge fluctuation of flash evaporation waste gas is large, part of enterprises adopt an airbag/gas holder + TO incinerator method TO treat the high-concentration dimethyl ether waste gas, and the process has the following problems: firstly, high-concentration dimethyl ether waste gas enters an air bag/air cabinet and needs to be conveyed by a booster fan/compressor, so that certain safety risk exists; secondly, the safety management requirement of the air bag/air cabinet is high, and the construction investment and the maintenance cost are high; thirdly, the waste gas stored by the air bag/air cabinet enters the TO incinerator and needs TO be pressurized by a booster fan/compressor, so that certain safety risk exists; and fourthly, the temperature of the flue gas at the outlet of the TO incinerator is high, and the heat loss is easily caused due TO insufficient recovery.
Therefore, aiming at flammable gases with high concentration and intermittent discharge, the establishment of a safe, reliable and stable operation method and device is a difficult problem in the industry at present.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a dimethyl ether flash evaporation waste gas oxidation treatment device aiming at the defects in the prior art.
The technical scheme is as follows: the technical scheme adopted by the utility model for solving the problems is as follows: a dimethyl ether flash evaporation waste gas oxidation treatment device comprises:
a safe exhaust gas collection system;
an exhaust gas safety treatment system;
a waste heat recovery system;
the waste gas safe collection system comprises a multi-stage absorption slow release unit, and the multi-stage absorption slow release unit is provided with a high-concentration dimethyl ether flash evaporation waste gas inlet pipeline and a nitrogen gas inlet pipeline;
the waste gas safety treatment system comprises a gas injection unit and a negative pressure oxidation unit; the gas injection unit is provided with a steam inlet pipeline and is correspondingly connected with the multistage absorption slow release unit, the negative pressure oxidation unit is connected with the gas injection unit, and the negative pressure oxidation unit is also provided with a combustion-supporting gas inlet pipeline;
the waste heat recovery system comprises a waste heat recovery unit, the waste heat recovery unit is correspondingly connected with the negative pressure oxidation unit, and an air outlet end of the waste heat recovery unit is connected with an air exhaust cylinder.
Further, the system also comprises a safety interlocking control system, wherein the safety interlocking control system comprises a safety explosion venting valve, a safety water seal, a pressure detector, an oxygen content detector, an accident venting valve and a flow rate limiting valve which are arranged between the multi-stage absorption slow-release unit and the gas injection unit;
the pressure detector and the flow rate limiting valve are arranged on each air inlet pipeline;
and a temperature detector, a pressure detector and a flame detector arranged in the negative pressure oxidation unit.
Furthermore, at least five absorption slow-release devices connected in series are arranged in the multistage absorption slow-release unit, water is used as an absorbent of the absorption slow-release devices, nitrogen in a nitrogen inlet pipeline is used as blowing gas, the nitrogen inlet pipeline is correspondingly communicated with each absorption slow-release device, and a demister is further arranged at the gas outlet end of the multistage absorption slow-release unit.
Furthermore, flame arresters are respectively arranged at the gas inlet end and the gas outlet end of the gas injection unit, and the gas injection unit comprises a gas flow distributor, an injection device and a mixer; the air flow distributor is arranged in a vertical cylinder structure, and the bottom of the cylinder is provided with spaced waste gas outlets; the mixer is composed of a nozzle, an enlarged pipe and a mixing chamber.
Furthermore, the negative pressure oxidation unit is arranged as a horizontal furnace body, an igniter is arranged at the air inlet end of the horizontal furnace body, baffling heat storage walls which are arranged in a staggered mode are further arranged inside the horizontal furnace body, and an LEL analyzer is further arranged on the horizontal furnace body.
Furthermore, the combustion-supporting gas inlet pipeline is set to be a natural gas inlet pipeline and a low-concentration waste gas/air inlet pipeline, a natural gas burner is installed on the natural gas inlet pipeline, the low-concentration waste gas/air inlet pipeline is provided with two branches, one branch is directly communicated into the horizontal furnace body, and the other branch is communicated to the igniter.
Further, the waste heat recovery unit comprises a waste heat boiler, a heat conduction oil heat exchanger, a waste gas heat exchanger and an L-G heat exchanger.
Furthermore, the exhaust funnel is of a sleeve structure, is made of stainless steel and has a height of 25 m.
Has the advantages that: compared with the prior art, the utility model has the following advantages:
(1) the utility model adopts a multistage absorption slow release unit to replace an air bag/air cabinet in the prior art, has low investment cost and simple management, is an effective, low-cost and safe alternative mode, fully utilizes the mixing and dissolving characteristics of dimethyl ether and water, takes water as an absorbent, can absorb water-soluble pollutants such as dimethyl ether, trimethylamine, alcohols and the like in waste gas, can also be used as a buffer facility for flash evaporation instant high-concentration waste gas, and simultaneously utilizes the principle of 'peak clipping and valley filling', effectively solves the impact of flash evaporation waste gas on a treatment system, and simultaneously realizes the regeneration of the absorbent without generating waste water;
(2) the utility model adopts the gas injection unit to replace a booster fan/compressor, thereby avoiding the safety problem caused by devices such as a motor and the like; the high-pressure steam flows quickly to form negative pressure to suck in the waste gas, so that the steam and the high-concentration waste gas are fully mixed in the mixing chamber, the requirement that the system is in a low-oxygen state (the oxygen content is less than or equal to 1 percent) is met, and the safety problem caused by the concentration of the high-concentration dimethyl ether waste gas in the dead angle of the device is avoided;
(3) the negative pressure oxidation unit is adopted for oxidation, the treatment efficiency is as high as 99.9%, and the problems of excessive exhaust gas emission and odor disturbing residents are effectively solved; the system oxidation temperature is maintained at about 1100 ℃ by adjusting the air supply quantity, organic matters contained in the waste gas are completely oxidized and destroyed, baffling heat storage walls are arranged in a hearth and are staggered, the turbulence degree of the flue gas is effectively improved, the complete oxidation is ensured, and low-concentration unorganized waste gas is used as combustion air to treat wastes with processes of wastes against one another;
(4) the utility model is provided with a multiple safety interlocking control system, the whole device and the process have ultrahigh safety, a high-concentration dimethyl ether flash evaporation waste gas inlet pipeline adopts a positive pressure conveying design and is provided with a nitrogen protection system through a nitrogen inlet pipeline, two pressure detectors can be installed on the high-concentration dimethyl ether flash evaporation waste gas inlet pipeline to be interlocked with the safety interlocking control system, when the pipeline pressure is lower than a set minimum pressure value, a valve on the nitrogen inlet pipeline is opened to supplement nitrogen into the pipeline, the pipeline and a multistage absorption slow release unit are ensured to be in a micro positive pressure state and a low oxygen state, and the safety problem caused by the formation of explosive mixtures of dimethyl ether and air is avoided from the source; the utility model is also provided with a pressure detector, a temperature detector, a flame detector, a flow limiting valve, a safety explosion venting valve, a safety water seal, a nitrogen pressure supplementing and blowing-off device and other safety interlocking control systems to ensure the safe operation of the system;
(5) the waste heat recovery system provided by the utility model recovers heat energy by adopting a three-stage step recycling or direct steam recycling system, has remarkable economic benefit, generates steam and hot water by recovering the heat of high-temperature flue gas, can merge saturated steam into a steam pipe network, can use the hot water as water for production and living of enterprises, and has remarkable energy value and economic value.
Drawings
FIG. 1 is a block diagram of the present invention.
Detailed Description
The present invention will be further illustrated with reference to the accompanying drawings and specific examples, which are carried out on the premise of the technical solution of the present invention, and it should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1, a dimethyl ether flash evaporation waste gas oxidation treatment device comprises: the system comprises a waste gas safety collecting system, a waste gas safety processing system, a waste heat recovery system and a safety interlocking control system; the safety interlocking system comprises a DCS automatic control system for key parameters such as pressure, temperature, flame, oxygen content and the like; the waste heat recovery system comprises a waste heat boiler, a heat conducting oil heat exchanger, a waste gas heat exchanger and an L-G heat exchanger.
The flash evaporation waste gas of the high-concentration dimethyl ether comprises but is not limited to dimethyl ether, the concentration of the high-concentration flammable gas is far greater than the upper limit of the explosion limit of the flammable gas, the reaction unit of the flash evaporation waste gas is a discontinuous process, and the pressure and the flow rate of the produced gas have obvious fluctuation.
The waste gas safety collecting system comprises a multistage absorption slow release unit 1, wherein the multistage absorption slow release unit 1 is provided with a high-concentration dimethyl ether flash evaporation waste gas inlet pipeline and a nitrogen gas inlet pipeline.
The dimethyl ether and water mixing and dissolving characteristic is fully utilized, water is used as an absorbent, nitrogen is used as blowing gas, flash evaporation high-concentration dimethyl ether waste gas in the exhaust process of the production device quickly enters the multistage absorption slow-release unit, the dimethyl ether waste gas enters the subsequent treatment unit after being efficiently absorbed, and the absorbed dimethyl ether is slowly released to enter the subsequent treatment unit through nitrogen blowing in the non-exhaust process, so that peak clipping and valley filling are realized, the stable operation of the subsequent treatment unit is ensured, and the regeneration of the absorbent is realized.
The waste gas safety treatment system comprises a gas injection unit 2 and a negative pressure oxidation unit 3; the gas injection unit 2 is provided with a steam inlet pipeline and is correspondingly connected with the multistage absorption slow release unit 1, the negative pressure oxidation unit 3 is connected with the gas injection unit 2, and the negative pressure oxidation unit 3 is also provided with a combustion-supporting gas inlet pipeline.
The waste heat recovery system comprises a waste heat recovery unit 4, the waste heat recovery unit 4 is correspondingly connected with the negative pressure oxidation unit 3, an exhaust funnel 5 is connected to the air outlet end of the waste heat recovery unit 4, the exhaust funnel 5 is of a sleeve structure and is made of stainless steel, and the height of the exhaust funnel is 25 m.
The safety interlocking control system comprises a safety explosion venting valve, a safety water seal, a pressure detector 13, an oxygen content detector 14, an accident venting valve and a flow rate limiting valve which are arranged between the multi-stage absorption slow-release unit 1 and the gas injection unit 2, the pressure detector 13 and the flow rate limiting valve which are arranged on each gas inlet pipeline, and a temperature detector 15, a pressure detector 13 and a flame detector which are arranged in the negative pressure oxidation unit 3.
In the utility model, a plurality of safety explosion venting valves, safety water seals, pressure detectors, accident venting valves and flow limiting valves are arranged between the multistage absorption slow release unit and the gas injection unit; wherein the pressure of the safety explosion venting valve is set to be 0.03 MPa; the safety water seal is arranged at the tail end of the outlet pipeline of the last stage of absorption tower in specification
The liquid level was kept around 2700 mm; the accident blow-down valve is a pneumatic butterfly valve, and the specification is 200A multiplied by 200A; the flow limiting valve is a vortex shedding flowmeter with the specification of DN100, and the maximum flow is limited to 800Nm3/h。
Wherein, the temperature detector directly reflects the oxidation condition of the negative pressure oxidation unit and adjusts the fuel and air quantity in a linkage way; meanwhile, the method is a judgment condition of the auxiliary combustion interlocking protection of the hearth temperature, and when the interlocking protection of the auxiliary combustor is put into an automatic state, the air supply proportional valve of the combustor is interlocked to set the temperature for automatic adjustment, so that the temperature of the combustion chamber is kept to operate at the temperature of above 850 ℃.
The pressure detector is arranged to directly reflect the pressure condition of the negative pressure oxidation unit, and the negative pressure oxidation unit is always kept in a certain negative pressure state; the main means of adjusting the negative pressure is to adjust the frequency of the induced draft fan, the feeding amount of the waste gas and the amount of the combustion-supporting air, adjust the burning condition and reasonably control the burning.
The flame detector is used for reflecting the ignition condition of the negative pressure oxidation unit, and the negative pressure oxidation unit immediately cuts off the supply of waste gas once flameout or ignition failure occurs in the furnace, so that the alarm system is complete, safe and reliable.
The flow limiting valve is used for controlling the maximum waste gas flow and pressure of the negative pressure oxidation unit to avoid overload operation; when the flow of the waste gas is small and the pressure is lower than a set value, the waste gas and steam inlet valves are cut off in a linkage manner, and meanwhile, the natural gas burner is started to maintain the temperature of the negative pressure oxidation unit to ensure normal operation; when the exhaust gas flow meter pressure exceeds a set value, the system enters an emergency shutdown procedure.
The safety explosion venting valve can effectively release suddenly increased pressure of the waste gas collecting system under the condition of an accident state; the safe water seal ensures that the production device and the waste gas treatment device are reliably and physically isolated, and accidental release of the waste gas collection system under abnormal working conditions can be effectively released; the accident emptying valve can control the waste gas of the waste gas collecting system to be directly discharged to the atmosphere in an accident state.
The safety interlocking device is also provided with a nitrogen pressure supplementing and blowing-off device, when the waste gas discharge system is closed or in a shutdown state, the nitrogen pressure supplementing and blowing-off device is started, so that the pressure in the waste gas collection system is relatively stable or the waste gas accumulation in the pipeline in the shutdown state is avoided to generate explosion risks.
The multistage absorption slow-release unit 1 is at least internally provided with five absorption slow-release devices 6 which are connected in series, the absorption slow-release devices 6 take water as an absorbent, nitrogen in a nitrogen inlet pipeline is taken as blowing gas, the nitrogen inlet pipeline is correspondingly communicated with each absorption slow-release device 6, and the gas outlet end of the multistage absorption slow-release unit 1 is also provided with a demister 7.
The gas inlet end and the gas outlet end of the gas injection unit 2 are respectively provided with a flame arrester 9, and the gas injection unit 2 comprises a gas flow distributor, an injection device 8 and a mixer; the air flow distributor is arranged to be of a vertical cylinder structure, the diameter of the cylinder is 300mm, the height of the cylinder is 2000mm, and the cylinder is provided with a waste gas outlet at intervals of 100mm from the bottom end.
The gas injection unit adopts a mixer to suck waste gas by utilizing the high-pressure steam injection effect, the mixer is composed of a nozzle, an expansion pipe, a mixing chamber and the like, the steam is sprayed out from the nozzle at a high flow speed under high pressure during operation, a certain negative pressure is formed in the surrounding space, the waste gas is brought into the high-speed steam, the steam and the tail gas are fully mixed in the mixing chamber and then are sent into a negative pressure oxidation unit through a flame arrester, the safety problem caused by the gathering of high-concentration dimethyl ether waste gas at the dead angle of the device is avoided, an airflow distributor is arranged at one end close to an air inlet, the waste gas can be distributed more uniformly from the air inlet through the airflow distributor, and the pressure fluctuation caused by the instantaneous starting and stopping of the mixer is counteracted.
The negative pressure oxidation unit 3 is arranged as a horizontal furnace body, an igniter 10 is arranged at the air inlet end of the horizontal furnace body, baffling heat accumulation walls 12 which are arranged in a staggered mode are further arranged inside the horizontal furnace body, and an LEL analyzer is further arranged on the horizontal furnace body.
The main body of the negative pressure oxidation unit is a horizontal furnace body, and organic substances in waste gas are thoroughly decomposed and destroyed through complex physical and chemical reactions of the waste gas in a hearth; baffling heat storage walls are arranged in the hearth and are arranged in a staggered mode, so that the turbulence degree of the flue gas is effectively improved; the temperature is more than or equal to 1100 ℃, the retention time is more than or equal to 1.2s, and the removal rate of organic matters is ensured; low-concentration unorganized waste gas is used as combustion-supporting air, waste is used for treating waste, an LEL analyzer is required to be configured for ensuring safety, and LEL switching air with the concentration of organic matters reaching 25% is used as combustion-supporting air.
The combustion-supporting gas inlet pipeline is provided with a natural gas inlet pipeline and a low-concentration waste gas/air inlet pipeline, a natural gas burner 11 is installed on the natural gas inlet pipeline, the low-concentration waste gas/air inlet pipeline is provided with two branch circuits, one branch circuit is directly communicated into the horizontal furnace body, and the other branch circuit is communicated to an igniter 10.
The waste heat recovery unit 4 comprises a waste heat boiler, a heat conduction oil heat exchanger, a waste gas heat exchanger and an L-G heat exchanger, and can be divided into three-stage step recycling or direct steam recycling; in the three-stage stepped recycling, the first stage is that high-pressure steam is generated by boiler heat exchange, the second stage is that low-pressure steam is generated by gas-gas heat exchange, the third stage is that hot water is generated by gas-liquid heat exchange, the high-temperature flue gas heat energy generated by the negative pressure oxidation unit is fully utilized by circulating and reducing the stage, and the flue gas temperature is reduced; the purposes of heat energy recovery and flue gas cooling are achieved through three-stage step recycling or direct steam recycling.
Example 1
The alkali fusion section of the intermittent H-acid production process of a certain chemical production enterprise in Jiangsu emits a great amount of irritant, malodorous and toxic dimethyl ether (C)2H6O) mixed exhaust gas having the following composition as a main component: dimethyl ether (C)2H6O)67.38, trimethylamine (C)3H9N) 0.076%, nitrogen (N)2) 32.546%, mixed gas density 1.509kg/m3Pressure 0.0003MpaG and waste gas air volume about 500m3The concentration of dimethyl ether is about 1133637mg/m3。
The high-concentration inflammable intermittent waste gas is directly discharged at high altitude, the peculiar smell is obvious, by adopting the treatment device, the waste gas is condensed and then enters the multi-stage absorption slow release unit, the six-stage water absorption slow release device is configured, then the waste gas is connected into the waste gas main pipe, the waste gas main pipe is provided with safety interlocking systems and devices such as a safety explosion relief valve, a safety water seal, a pressure detector, an oxygen content detector, an accident discharge valve, a flow limiting valve and the like, the waste gas passes through the gas injection unit, and steam and the high-concentration waste gas are fully mixed in the mixing chamber and then are sent into the negative pressure oxidation unit for high-temperature oxidation after passing through the flame arrester. High-temperature flue gas generated by oxidation enters a waste heat boiler and an economizer to generate saturated steam of 1.2MpaG, and byproduct steam is merged into a steam pipe network of 0.9MPaG when the system is stable. After waste heat recoveryThe temperature of the flue gas is reduced to below 160 ℃, and the flue gas is pressurized by a draught fan and is discharged through a chimney with the height of 25m to reach the standard. The concentration of non-methane total hydrocarbon at the outlet of the exhaust funnel is less than 3mg/m3The treatment efficiency is more than 99.9 percent.
The DCS is adopted to automatically control the waste gas safety collecting system, the multi-stage absorption slow release unit, the negative pressure oxidation unit and the waste heat recovery unit, the operation or on-off control of the equipment is completed by the DCS according to the production working condition and the production requirement without manual intervention, the automatic operation of the system is realized to the maximum extent, and the guarantee is provided for the safe and economic operation of the system. Specific control instructions are shown in the following table.
Safety interlocking description table for multi-stage absorption negative pressure oxidation device
The above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the utility model and the appended claims, and all equivalent changes and modifications made within the spirit and scope of the utility model as claimed should be included in the appended claims.
Claims (8)
1. The utility model provides a dimethyl ether flash distillation waste gas oxidation processing apparatus which characterized in that: the method comprises the following steps: the system comprises a waste gas safety collecting system, a waste gas safety processing system and a waste heat recovery system;
the waste gas safe collection system comprises a multi-stage absorption slow release unit (1), wherein the multi-stage absorption slow release unit (1) is provided with a high-concentration dimethyl ether flash evaporation waste gas inlet pipeline and a nitrogen gas inlet pipeline;
the waste gas safety treatment system comprises a gas injection unit (2) and a negative pressure oxidation unit (3); the gas injection unit (2) is provided with a steam inlet pipeline and is correspondingly connected with the multistage absorption slow-release unit (1), the negative pressure oxidation unit (3) is connected with the gas injection unit (2), and the negative pressure oxidation unit (3) is also provided with a combustion-supporting gas inlet pipeline;
the waste heat recovery system comprises a waste heat recovery unit (4), the waste heat recovery unit (4) is correspondingly connected with the negative pressure oxidation unit (3), and an exhaust funnel (5) is connected to the air outlet end of the waste heat recovery unit (4).
2. The dimethyl ether flash evaporation waste gas oxidation treatment device according to claim 1, characterized in that: the system also comprises a safety interlocking control system, wherein the safety interlocking control system comprises a safety explosion venting valve, a safety water seal, a pressure detector (13), an oxygen content detector (14), an accident venting valve and a flow rate limiting valve which are arranged between the multi-stage absorption slow-release unit (1) and the gas injection unit (2); and a pressure detector (13) and a flow rate limiting valve arranged on each air inlet pipeline; and a temperature detector (15), a pressure detector (13) and a flame detector which are arranged in the negative pressure oxidation unit (3).
3. The dimethyl ether flash evaporation waste gas oxidation treatment device according to claim 2, characterized in that: the multistage absorption slow-release unit (1) is internally provided with at least five absorption slow-release devices (6) which are connected in series, the absorption slow-release devices (6) take water as an absorbent and take nitrogen in a nitrogen inlet pipeline as blowing gas, the nitrogen inlet pipeline is correspondingly communicated with each absorption slow-release device (6), and the gas outlet end of the multistage absorption slow-release unit (1) is also provided with a demister (7).
4. The dimethyl ether flash evaporation waste gas oxidation treatment device according to claim 2, characterized in that: the gas injection unit (2) is characterized in that a flame arrester (9) is correspondingly arranged at the gas inlet end and the gas outlet end of the gas injection unit (2), and the gas injection unit (2) comprises a gas flow distributor, an injection device (8) and a mixer; the air flow distributor is arranged in a vertical cylinder structure, and the bottom of the cylinder is provided with spaced waste gas outlets; the mixer is composed of a nozzle, an enlarged pipe and a mixing chamber.
5. The dimethyl ether flash evaporation waste gas oxidation treatment device according to claim 2, characterized in that: the negative pressure oxidation unit (3) is arranged as a horizontal furnace body, an igniter (10) is arranged at the air inlet end of the horizontal furnace body, baffling heat storage walls (12) which are arranged in a staggered mode are further installed inside the horizontal furnace body, and an LEL analyzer is further installed on the horizontal furnace body.
6. The dimethyl ether flash evaporation waste gas oxidation treatment device according to claim 5, characterized in that: the combustion-supporting gas inlet pipeline is set to be a natural gas inlet pipeline and a low-concentration waste gas/air inlet pipeline, a natural gas burner (11) is installed on the natural gas inlet pipeline, the low-concentration waste gas/air inlet pipeline is provided with two branches, one branch is directly communicated into the horizontal furnace body, and the other branch is communicated to the igniter (10).
7. The dimethyl ether flash evaporation waste gas oxidation treatment device according to claim 2, characterized in that: the waste heat recovery unit (4) comprises a waste heat boiler, a heat conduction oil heat exchanger, a waste gas heat exchanger and an L-G heat exchanger.
8. The dimethyl ether flash evaporation waste gas oxidation treatment device according to claim 2, characterized in that: the exhaust funnel (5) is of a sleeve structure, is made of stainless steel and is 25m high.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113877372A (en) * | 2021-11-18 | 2022-01-04 | 江苏齐清环境科技有限公司 | Multistage absorption negative pressure oxidation treatment device of high concentration dimethyl ether flash distillation waste gas |
| CN115957713A (en) * | 2022-12-20 | 2023-04-14 | 江苏奥喜埃化工有限公司 | Sodium hypochlorite production system of protection production line |
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2021
- 2021-11-18 CN CN202122838638.0U patent/CN216281438U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113877372A (en) * | 2021-11-18 | 2022-01-04 | 江苏齐清环境科技有限公司 | Multistage absorption negative pressure oxidation treatment device of high concentration dimethyl ether flash distillation waste gas |
| CN115957713A (en) * | 2022-12-20 | 2023-04-14 | 江苏奥喜埃化工有限公司 | Sodium hypochlorite production system of protection production line |
| CN115957713B (en) * | 2022-12-20 | 2023-12-01 | 江苏奥喜埃化工有限公司 | Sodium hypochlorite production system of protection production line |
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