WO2020093584A1 - Process for adsorption treatment of organic waste gas and desorption regeneration of adsorbent - Google Patents

Process for adsorption treatment of organic waste gas and desorption regeneration of adsorbent Download PDF

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Publication number
WO2020093584A1
WO2020093584A1 PCT/CN2019/070294 CN2019070294W WO2020093584A1 WO 2020093584 A1 WO2020093584 A1 WO 2020093584A1 CN 2019070294 W CN2019070294 W CN 2019070294W WO 2020093584 A1 WO2020093584 A1 WO 2020093584A1
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regeneration
adsorbent
exhaust gas
regeneration tank
desorption
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PCT/CN2019/070294
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French (fr)
Chinese (zh)
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茆林凤
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无锡四方集团有限公司
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/40—Further details for adsorption processes and devices
    • B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
    • B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/40—Further details for adsorption processes and devices
    • B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
    • B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
    • B01D2259/4009—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating using hot gas

Definitions

  • the present invention relates to the field of desorption regeneration, in particular to an adsorbent (including activated carbon, activated coke, zeolite, etc.) that adsorbs organic matter in organic waste gas after adsorption saturation and a desorption regeneration process, and a tail gas treatment process generated during the desorption regeneration process .
  • an adsorbent including activated carbon, activated coke, zeolite, etc.
  • Activated carbon has a large specific surface area and strong adsorption capacity for various organic and inorganic substances, so it is widely used in the adsorption and purification treatment of various exhaust gases and wastewater, and the separation treatment of some mixtures, such as hydrocarbons Adsorption and purification of exhaust gas, adsorption and purification of sulfur-containing compound exhaust gas, and adsorption purification of oily sewage, etc.
  • the activated carbon needs to be regenerated after being saturated with adsorption.
  • vacuum regeneration that is, the material adsorbed in the pores of activated carbon is desorbed under vacuum conditions
  • steam regeneration that is, the substance adsorbed in the pores of activated carbon is steam Desorption.
  • the steam regeneration process it is generally necessary to reduce the temperature of the activated carbon bed to a certain degree, and then use air to dry. Direct air drying at high temperature is prone to safety accidents, and the toxic and harmful gases generated after activated carbon regeneration are directly released into the environment Will cause pollution to the environment.
  • the invention provides an adsorption process of organic waste gas and a desorption regeneration process of the adsorbent, which are problems existing in the prior art in the adsorption and desorption regeneration separation of the adsorbent.
  • the present invention provides a device for adsorption treatment of organic waste gas and desorption regeneration of its adsorbent, including a steam injection system, a regeneration tank, and an exhaust gas treatment system.
  • the steam injection system includes a superheated steam generator, Main steam pipe, secondary steam pipe and nozzle. Wherein, an accommodation space provided in the regeneration tank and a number of secondary steam pipes are provided in the accommodation space, and one end of the secondary steam pipe is connected to the superheated steam generator through the main steam pipe And the nozzle is provided at the other end.
  • the regeneration tank is provided with an exhaust gas outlet and a purified gas outlet and the purified gas outlet is located at the lower part of the regeneration tank, the exhaust gas outlet is connected to an exhaust gas treatment system through an exhaust gas pipe, and the organic waste gas is connected to the exhaust gas through a second flame arrester Describe the exhaust gas inlet at the top of the regeneration tank.
  • An adsorption process of organic waste gas and its desorption regeneration process of adsorbent include the following steps:
  • the first step is the heating and volatilization phase.
  • the adsorbent is saturated with organic waste gas, close the waste gas inlet and the purified gas outlet, open the valves on the main steam pipe and the exhaust gas pipe, and start the superheated steam generator to pass the hot steam into the regeneration tank.
  • the exhaust gas pipeline leads to the exhaust gas treatment system, the pressure in the regeneration tank is maintained at 0.1 ⁇ 2bar, and the temperature in the regeneration tank is in the range of 200 °C ⁇ 800 °C, which can be set as required;
  • the second step the heat preservation stage, when the temperature in the regeneration tank reaches the set temperature, it is necessary to continuously pass hot steam for heat preservation, and the heat preservation time is more than 0.5 hours;
  • the third step is the low-temperature purge phase.
  • the temperature in the regeneration tank is adjusted to 100-200 ° C, the pressure in the regeneration tank is maintained at 0.1-2 bar, and the low-temperature purge time is 0.2-3 hours.
  • the temperature in the regeneration tank in the first step is 250 ° C, 340 ° C, 380 ° C, 400 ° C, 450 ° C, 600 ° C, 800 ° C.
  • the holding time in the second step is 0.5 to 24 hours.
  • the time of the low-temperature purge stage in the third step is 0.2 to 3 hours.
  • the adsorbent includes activated carbon, activated coke, and zeolite.
  • An equipment for adsorption treatment of organic waste gas and desorption regeneration of adsorbent provided by the invention is provided with a steam injection system, a regeneration tank, and an exhaust gas treatment system to perform desorption regeneration in the regeneration tank , Strictly control the temperature and pressure, improve the efficiency and safety of adsorbent desorption regeneration.
  • the harmful substances in the organic waste gas are first adsorbed and removed in the regeneration tank, and when the adsorbent is saturated, the adsorbent is regenerated.
  • the desorption regeneration of the adsorbent includes heating and heating volatilization, high temperature insulation, high temperature desorption or high temperature cracking, carbonization desorption, and finally low temperature purge treatment.
  • a small amount of carbides and residual organic matter are continuously entered into the superheated steam from the activated carbon pore
  • the purge is carried out, so that the adsorbent is activated and regenerated.
  • the temperature value of the adsorbent desorption regeneration is determined according to the characteristics of the organic matter to be processed. There are two situations where there is a cracking requirement or only desorption and no cracking. If there is a cracking requirement, it is set according to the specific cracking temperature of the processed object For the temperature value, set the desorption temperature only when desorption does not crack.
  • FIG. 1 is a schematic diagram of the overall structure of an apparatus for adsorption treatment of organic waste gas and desorption regeneration of an adsorbent according to a first embodiment of the present invention.
  • FIG. 2 is a schematic diagram of the overall structure of an apparatus for adsorption treatment of organic waste gas and desorption regeneration of an adsorbent according to a second embodiment of the present invention.
  • FIG. 3 is a schematic diagram of the overall structure of an apparatus for adsorption treatment of organic waste gas and desorption regeneration of an adsorbent according to a third embodiment of the present invention.
  • 101-superheated steam generator 102-main steam pipeline, 103-secondary steam pipeline, 2-regeneration tank, 3-condensation pipe, 301-cooling water inlet, 302-cooling water outlet, 4-condensation water collection tank , 5-water pump, 6-combustion chamber, 7-droplet separator, 8-water tank, 9-first flame arrester, 10-second flame arrester.
  • a device for adsorption treatment of organic waste gas and desorption regeneration of an adsorbent provided by the present invention includes a steam injection system, a regeneration tank 2, and an exhaust gas treatment system.
  • the steam injection system includes superheated steam generation 101, main steam pipe 102, secondary steam pipe 103 and nozzle.
  • an accommodating space provided in the regeneration tank 2 and a plurality of secondary steam pipes 103 are provided in the accommodating space, and one end of the secondary steam pipe 103 is connected to the superheat through the main steam pipe 102
  • the steam generator 101 is provided with the nozzle at the other end.
  • the regeneration tank 2 is provided with an exhaust gas outlet and a purified gas outlet, and the purified gas outlet is located at a lower portion of the regeneration tank 2, the exhaust gas outlet is connected to an exhaust gas treatment system through an exhaust gas pipe, and organic waste gas passes through a second flame arrester 10 Connected to the exhaust gas inlet at the top of the regeneration tank 2.
  • the secondary steam pipe 103 has a tree structure.
  • the regeneration tank 2 includes a tank body and a tank lid. The tank lid is tightly closed above the tank body. The bottom end of the regeneration tank 2 is provided with a drainage outlet. The regeneration tank 2 is provided in the accommodation space There are temperature sensors and pressure sensors. Valves are provided on the main steam pipe 102 and the exhaust gas pipe.
  • the tail gas condensation treatment can be used for the crackable carbonized tail gas.
  • the exhaust gas treatment system includes a condenser pipe 3 and a condensate collection tank 4.
  • the exhaust gas outlet of the regeneration tank 2 is connected to the inlet of the condenser pipe 3 through an exhaust gas pipe, and the outlet of the condenser pipe 3 is connected to the condensate water In the collecting tank 4, cooling water inlet 301 and cooling water outlet 302 are respectively provided at both ends of the condenser tube 3.
  • This embodiment provides an organic waste gas adsorption treatment and its adsorbent desorption regeneration process, including the following steps:
  • the first step is the heating and volatilization stage. After the adsorbent is saturated with organic waste gas, close the waste gas inlet and the purified gas outlet, open the valves on the main steam pipe 102 and the exhaust gas pipe, start the superheated steam generator 101, and the superheated steam quickly heats up
  • the steam injection system pre-buried in the regeneration tank enters the regeneration tank and heats the adsorbent in the regeneration tank.
  • the exhaust gas pipeline leads to the exhaust gas treatment system, the pressure in the regeneration tank 2 is maintained at 0.1 to 2 bar, and the temperature in the regeneration tank 2 is in the range of 200 ° C to 800 ° C, which can be set as required.
  • This specific set temperature value is determined according to the characteristics of the organic matter to be processed. If there is a cracking requirement, the temperature value is set according to the specific cracking temperature of the processed object.
  • the special temperature is 380 °C, 400 °C, 600 ⁇ 800 °C, 380 °C can crack to remove the carbon-containing dry distillation contained in the adsorbent, 400 °C can crack to remove the organic compounds of CO and CN bond contained in the adsorbent, 400 ⁇ 800 °C can carbonize and remove the carbon compounds contained in the adsorbent.
  • the heat preservation stage when the temperature in the regeneration tank 2 reaches the set temperature, it is necessary to continue to pass hot steam for heat preservation, the heat preservation time is more than 0.5 hours, and the special heat preservation time is 1 hour.
  • the third step is the low temperature purge phase.
  • the temperature in the regeneration tank 2 is adjusted to 100 to 200 ° C, the pressure in the regeneration tank 2 is maintained at 0.1 to 2 bar, and the low temperature purge time is 0.2 to 3 hours The time for the special low-temperature purge stage is 0.2 to 3 hours.
  • a small part of the carbides and residual organics are swept out of the activated carbon pores by the continuously entering superheated steam, so that the adsorbent is activated and regenerated.
  • the valve on the main steam pipe 102 is closed to allow natural cooling.
  • the adsorbent includes activated carbon, activated coke, and zeolite.
  • a device for adsorption treatment and desorption regeneration of organic waste gas includes a steam injection system, a regeneration tank 2, and an exhaust gas treatment system.
  • the steam injection system includes a superheated steam generator 101, a main steam pipe 102, a secondary steam pipe 103 and a nozzle.
  • an accommodating space provided in the regeneration tank 2 and a plurality of secondary steam pipes 103 are provided in the accommodating space, and one end of the secondary steam pipe 103 is connected to the superheat through the main steam pipe 102
  • the steam generator 101 is provided with the nozzle at the other end.
  • the regeneration tank 2 is provided with an exhaust gas outlet and a purified gas outlet, and the purified gas outlet is located at a lower portion of the regeneration tank 2, the exhaust gas outlet is connected to an exhaust gas treatment system through an exhaust gas pipe, and organic waste gas passes through a second flame arrester 10 Connected to the exhaust gas inlet at the top of the regeneration tank 2.
  • the secondary steam pipe 103 has a tree structure.
  • the regeneration tank 2 includes a tank body and a tank lid. The tank lid is tightly closed above the tank body. The bottom end of the regeneration tank 2 is provided with a drainage outlet. The regeneration tank 2 is provided in the accommodation space There are temperature sensors and pressure sensors. Valves are provided on the main steam pipe 102 and the exhaust gas pipe.
  • the tail gas is directly incinerated, which can be used to desorb the tail gas without cracking.
  • the tail gas treatment system includes a tail gas incineration treatment equipment, the tail gas incineration treatment equipment includes a water droplet separator 7, a first flame arrester, a water tank 8 and a combustion chamber 6, the gas output end of the water droplet separator 7 and the first The input end of the flame arrester is connected, the liquid output end of the water droplet separator 7 is connected to the water tank 8, the water tank 8 communicates with the water inlet end of the combustion chamber 6, and the output end of the first flame arrester is connected To the intake end of the combustion chamber 6, the exhaust gas outlet of the regeneration tank 2 is connected to the water droplet separator 7 through an exhaust gas pipeline, and air and LNG enter the combustion chamber 6 through the air inlet and the LNG inlet, respectively.
  • the top of the combustion chamber 6 is provided with a chimney.
  • This embodiment provides an organic waste gas adsorption treatment and its adsorbent desorption regeneration process, including the following steps:
  • the first step is the heating and volatilization stage. After the adsorbent is saturated with organic waste gas, close the waste gas inlet and purified gas outlet, open the valves on the main steam pipe 102 and the exhaust gas pipe, start the superheated steam generator 101, and the superheated steam quickly heats up To the set temperature of 200 ⁇ 1000 °C, the steam injection system pre-buried in the regeneration tank enters the regeneration tank and heats the adsorbent in the regeneration tank.
  • the exhaust gas pipeline leads to the exhaust gas treatment system, the pressure in the regeneration tank 2 is maintained at 0.1 to 2 bar, and the temperature in the regeneration tank 2 is in the range of 200 ° C to 800 ° C, which can be set as required.
  • the specific set temperature value is determined according to the characteristics of the organic matter to be processed. There are two situations where there is a cracking requirement or only desorption and no cracking. If there is a cracking requirement, the temperature is set according to the specific cracking temperature of the processed object Value, set the desorption temperature as long as desorption does not crack.
  • 250 °C and 340 °C can remove small molecule inorganic substances such as oxygen, sulfur, CO 2 and hour 2 S contained in adsorbent. Organic matter.
  • the heat preservation stage in the heat preservation stage, when the temperature in the regeneration tank 2 reaches the set temperature, it is necessary to continuously pass hot steam for heat preservation, and the heat preservation time is more than 0.5 hours.
  • the third step is the low temperature purge phase.
  • the temperature in the regeneration tank 2 is adjusted to 100 to 200 ° C, the pressure in the regeneration tank 2 is maintained at 0.1 to 2 bar, and the low temperature purge time is 0.2 to 3 hours The time for the special low-temperature purge stage is 0.2 to 3 hours.
  • a small part of the carbides and residual organics are swept out of the activated carbon pores by the continuously entering superheated steam, so that the adsorbent is activated and regenerated. After purging, close the main steam pipe and let it cool naturally.
  • the adsorbent includes activated carbon, activated coke, and zeolite.
  • a device for adsorption treatment of organic waste gas and desorption regeneration of an adsorbent provided by the present invention includes a steam injection system, a regeneration tank 2, and an exhaust gas treatment system.
  • the steam injection system includes a superheated steam generator 101, a main steam pipe 102, a secondary steam pipe 103 and a nozzle.
  • an accommodating space provided in the regeneration tank 2 and a plurality of secondary steam pipes 103 are provided in the accommodating space, and one end of the secondary steam pipe 103 is connected to the superheat through the main steam pipe 102
  • the steam generator 101 is provided with the nozzle at the other end.
  • the regeneration tank 2 is provided with an exhaust gas outlet and a purified gas outlet, and the purified gas outlet is located at a lower portion of the regeneration tank 2, the exhaust gas outlet is connected to an exhaust gas treatment system through an exhaust gas pipe, and organic waste gas passes through a second flame arrester 10 Connected to the exhaust gas inlet at the top of the regeneration tank 2.
  • the secondary steam pipe 103 has a tree structure.
  • the regeneration tank 2 includes a tank body and a tank lid. The tank lid is tightly closed above the tank body. The bottom end of the regeneration tank 2 is provided with a drainage outlet. The regeneration tank 2 is provided in the accommodation space There are temperature sensors and pressure sensors. Valves are provided on the main steam pipe 102 and the exhaust gas pipe.
  • the exhaust gas is first condensed and then incinerated.
  • the exhaust gas treatment system includes a condenser pipe 3, a condensed water collection tank 4, a water pump 5, a vaporization device, and an exhaust gas incineration treatment device.
  • the tail gas incineration processing equipment includes a water droplet separator 7, a first flame arrester, a water tank 8 and a combustion chamber 6, the gas output end of the water droplet separator 7 and the first The input end of a flame arrester is connected, the liquid output end of the water droplet separator 7 is connected to the water tank 8, the water tank 8 communicates with the water inlet end of the combustion chamber 6, and the output end of the first flame arrester Connected to the intake end of the combustion chamber 6, the exhaust gas outlet of the regeneration tank 2 is connected to the inlet of the condenser pipe 3 through an exhaust gas pipe, and the outlet of the condenser pipe 3 is connected to the condensate collection tank 4, the Cooling water inlet
  • the condensate in the condensate collecting tank 4 is sent to the vaporizing device through the water pump 5 and finally enters the water droplet separator 7, air And LNG respectively Gas inlet and LNG import into the combustion chamber 6, the top of the combustion chamber 6 is provided with a chimney.
  • This embodiment provides an organic waste gas adsorption treatment and its adsorbent desorption regeneration process, including the following steps:
  • the first step is the heating and volatilization stage. After the adsorbent is saturated with organic waste gas, close the waste gas inlet and the purified gas outlet, open the valves on the main steam pipe 102 and the exhaust gas pipe, start the superheated steam generator 101, and the superheated steam quickly heats up
  • the steam injection system pre-buried in the regeneration tank enters the regeneration tank and heats the adsorbent in the regeneration tank.
  • the exhaust gas pipeline leads to the exhaust gas treatment system, the pressure in the regeneration tank 2 is maintained at 0.1 to 2 bar, and the temperature in the regeneration tank 2 is in the range of 200 ° C to 800 ° C, which can be set as required.
  • This specific set temperature value is determined according to the characteristics of the processed organic matter, and the desorption temperature can be set only when desorption does not crack.
  • the special temperature is 380 °C, 400 °C, 600 ⁇ 800 °C, 380 °C can crack to remove the carbon-containing dry distillation contained in the adsorbent, 400 °C can crack to remove the organic compounds of CO and CN bond contained in the adsorbent, 400 ⁇ 800 °C can carbonize and remove the carbon compounds contained in the adsorbent.
  • the third step is the low temperature purge phase.
  • the temperature in the regeneration tank 2 is adjusted to 100 to 200 ° C, the pressure in the regeneration tank 2 is maintained at 0.1 to 2 bar, and the low temperature purge time is 0.2 to 3 hours The time for the special low-temperature purge stage is 0.2 to 3 hours.
  • a small part of the carbides and residual organics are swept out of the activated carbon pores by the continuously entering superheated steam, so that the adsorbent is activated and regenerated. After purging is completed, close the valve on the main steam pipe and let it cool naturally.
  • the adsorbent includes activated carbon, activated coke, and zeolite.
  • the device for adsorption treatment and desorption regeneration of organic waste gas provided by the present invention is provided with a steam injection system, a regeneration tank, and an exhaust gas treatment system to perform desorption regeneration in the regeneration tank, and is strictly controlled Temperature and pressure improve the efficiency and safety of adsorbent desorption regeneration.
  • the harmful substances in the organic waste gas are first adsorbed and removed in the regeneration tank, and when the adsorbent is saturated, the adsorbent is regenerated.
  • the desorption regeneration of the adsorbent includes heating and heating volatilization, high temperature insulation, high temperature desorption or high temperature cracking, carbonization desorption, and finally low temperature purge treatment.
  • the purge is carried out, so that the adsorbent is activated and regenerated.
  • the temperature value of the adsorbent desorption regeneration is determined according to the characteristics of the organic matter to be processed. There are two situations where there is a cracking requirement or only desorption and no cracking. For the temperature value, set the desorption temperature only when desorption does not crack.

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Abstract

A desorption regeneration process for an adsorbent (comprising activated carbon, activated coke, zeolite, etc.) for adsorbing organic matters in an organic waste gas after adsorption saturation, and a treatment process for tail gas generated during desorption regeneration. An adsorbent is subjected to desorption regeneration in a regeneration tank (2) in which a steam injection system is pre-embedded; the steam injection system comprises a main steam pipe (102) and several dendritic secondary steam pipes (103) provided on the main steam pipe (102); each of the secondary steam pipes (103) is provided with a steam nozzle; the steam injection system is embedded by the adsorbent. Superheated steam is introduced to heat the adsorbent in the regeneration tank (2), most of organic matters adsorbed by the adsorbent experience high temperature desorption, or high temperature pyrolysis and carbonization desorption, and organic matters and carbides in pores of the adsorbent are removed by steam purging to activate and regenerate the adsorbent. Tail gas generated during regeneration is processed by means of a tail gas treatment device, which is specifically a tail gas condensation treatment device, a tail gas incineration treatment device, or a device for treatment of tail gas by first condensation and then incineration.

Description

一种有机废气的吸附处理及其吸附剂的脱附再生工艺Organic waste gas adsorption treatment and desorption regeneration process of adsorbent 技术领域Technical field
本发明涉及一种脱附再生领域，具体涉及一种吸附有机废气中有机物的吸附剂(包括活性炭、活性焦、沸石等)吸附饱和后脱附再生工艺，以及脱附再生过程产生的尾气处理工艺。The present invention relates to the field of desorption regeneration, in particular to an adsorbent (including activated carbon, activated coke, zeolite, etc.) that adsorbs organic matter in organic waste gas after adsorption saturation and a desorption regeneration process, and a tail gas treatment process generated during the desorption regeneration process .
背景技术Background technique
活性炭具有很大的比表面积，对多种有机、无机物质具有较强的吸附能力，因此广泛用于各种废气、废水的吸附净化处理工艺中，以及一些混合物的分离处理过程，如含烃类废气的吸附净化、含硫化合物废气的吸附净化、含油污水的吸附净化等。Activated carbon has a large specific surface area and strong adsorption capacity for various organic and inorganic substances, so it is widely used in the adsorption and purification treatment of various exhaust gases and wastewater, and the separation treatment of some mixtures, such as hydrocarbons Adsorption and purification of exhaust gas, adsorption and purification of sulfur-containing compound exhaust gas, and adsorption purification of oily sewage, etc.
在吸附处理工艺中，活性炭吸附饱和后需要再生处理。再生方法主要包括两种，一种是真空再生，即在真空条件下将吸附在活性炭孔道中的物质脱附出来；另一种再生方法为蒸汽再生，即用蒸汽将吸附在活性炭孔道中的物质脱附。在蒸汽再生工艺中，一般需要将活性炭床层温度降到一定程度以后，再用空气进行干燥，高温下直接用空气干燥易发生安全事故，而且活性炭再生后产生的有毒有害气体直接释放到环境中会对环境造成污染。In the adsorption treatment process, the activated carbon needs to be regenerated after being saturated with adsorption. There are two main regeneration methods, one is vacuum regeneration, that is, the material adsorbed in the pores of activated carbon is desorbed under vacuum conditions; the other regeneration method is steam regeneration, that is, the substance adsorbed in the pores of activated carbon is steam Desorption. In the steam regeneration process, it is generally necessary to reduce the temperature of the activated carbon bed to a certain degree, and then use air to dry. Direct air drying at high temperature is prone to safety accidents, and the toxic and harmful gases generated after activated carbon regeneration are directly released into the environment Will cause pollution to the environment.
发明内容Summary of the invention
本发明提供一种有机废气的吸附处理及其吸附剂的脱附再生工艺，以现有技术存在的吸附剂的吸附和脱附再生分离的问题。The invention provides an adsorption process of organic waste gas and a desorption regeneration process of the adsorbent, which are problems existing in the prior art in the adsorption and desorption regeneration separation of the adsorbent.
为解决上述技术问题，本发明提供一种有机废气的吸附处理及其吸附剂的 脱附再生的设备，包括蒸汽喷射***、再生罐、尾气处理***，所述蒸汽喷射***包括过热蒸汽发生器、主蒸汽管道、次级蒸汽管道和喷嘴。其中，所述再生罐内设置有的容纳空间且所述容纳空间内设置有若干的次级蒸汽管道，所述次级蒸汽管道的一端通过所述主蒸汽管道连接到所述过热蒸汽发生器上且另一端设置有所述喷嘴。所述再生罐上设置有尾气出口和净化气出口且所述净化气出口位于所述再生罐的下部，所述尾气出口通过尾气管道连接到尾气处理***，有机废气通过第二阻火器连接到所述再生罐顶部的废气入口。In order to solve the above technical problems, the present invention provides a device for adsorption treatment of organic waste gas and desorption regeneration of its adsorbent, including a steam injection system, a regeneration tank, and an exhaust gas treatment system. The steam injection system includes a superheated steam generator, Main steam pipe, secondary steam pipe and nozzle. Wherein, an accommodation space provided in the regeneration tank and a number of secondary steam pipes are provided in the accommodation space, and one end of the secondary steam pipe is connected to the superheated steam generator through the main steam pipe And the nozzle is provided at the other end. The regeneration tank is provided with an exhaust gas outlet and a purified gas outlet and the purified gas outlet is located at the lower part of the regeneration tank, the exhaust gas outlet is connected to an exhaust gas treatment system through an exhaust gas pipe, and the organic waste gas is connected to the exhaust gas through a second flame arrester Describe the exhaust gas inlet at the top of the regeneration tank.
一种有机废气的吸附处理及其吸附剂的脱附再生工艺，包括以下步骤：An adsorption process of organic waste gas and its desorption regeneration process of adsorbent include the following steps:
第一步，升温加热挥发阶段，吸附剂吸附有机废气饱和后，关闭废气入口和净化气出口，打开主蒸汽管道和尾气管道上的阀，启动过热蒸汽发生器将热蒸汽通入再生罐中，尾气管道通到尾气处理***里，再生罐内的压力保持在0.1～2bar，再生罐内的温度为200℃～800℃范围，可以根据需要设置；The first step is the heating and volatilization phase. After the adsorbent is saturated with organic waste gas, close the waste gas inlet and the purified gas outlet, open the valves on the main steam pipe and the exhaust gas pipe, and start the superheated steam generator to pass the hot steam into the regeneration tank. The exhaust gas pipeline leads to the exhaust gas treatment system, the pressure in the regeneration tank is maintained at 0.1 ～ 2bar, and the temperature in the regeneration tank is in the range of 200 ℃ ～ 800 ℃, which can be set as required;
第二步，保温阶段，当再生罐内的温度达到设定的温度后，需要持续通入热蒸汽进行保温，保温时间为0.5小时以上；The second step, the heat preservation stage, when the temperature in the regeneration tank reaches the set temperature, it is necessary to continuously pass hot steam for heat preservation, and the heat preservation time is more than 0.5 hours;
第三步，低温吹扫阶段，保温阶段结束后，将再生罐内的温度调整到100～200℃，再生罐内的压力保持在0.1～2bar，低温吹扫的时间为0.2～3小时。The third step is the low-temperature purge phase. After the heat preservation phase, the temperature in the regeneration tank is adjusted to 100-200 ° C, the pressure in the regeneration tank is maintained at 0.1-2 bar, and the low-temperature purge time is 0.2-3 hours.
优选的，在所述第一步中再生罐内的温度为250℃、340℃、380℃、400℃、450℃、600℃、800℃。Preferably, the temperature in the regeneration tank in the first step is 250 ° C, 340 ° C, 380 ° C, 400 ° C, 450 ° C, 600 ° C, 800 ° C.
优选的，在所述第二步中保温时间为0.5～24小时。Preferably, the holding time in the second step is 0.5 to 24 hours.
优选的，在所述第三步中低温吹扫阶段的时间为0.2～3小时。Preferably, the time of the low-temperature purge stage in the third step is 0.2 to 3 hours.
优选的，所述吸附剂包括活性炭、活性焦、沸石。Preferably, the adsorbent includes activated carbon, activated coke, and zeolite.
本发明带来的有益效果：本发明提供的一种有机废气的吸附处理及其吸附 剂的脱附再生的设备通过设置蒸汽喷射***、再生罐、尾气处理***，将脱附再生在再生罐进行，严格控制温度和压力，提高了吸附剂脱附再生的效率和使用安全性。在有机废气的吸附处理及其吸附剂的脱附再生工艺中，先将有机废气中的有害物质在再生罐中吸附去除，当吸附剂饱和后对吸附剂进行再生处理。吸附剂的脱附再生包括升温加热挥发、再高温保温、高温脱附或高温裂解、碳化脱附，最后低温吹扫处理少部分碳化物和残留有机物被持续进入的过热水蒸气从活性炭孔隙中吹扫带出来，从而使吸附剂得到活化再生。吸附剂脱附再生的温度值是根据被处理有机物的特性来确定，有裂解要求或者只需脱附不要裂解两种情况，有裂解要求的情况就按照被处理对象的特定的裂解温度来设定温度值，只需脱附不要裂解的情况就设定脱附温度。Beneficial effect brought by the present invention: An equipment for adsorption treatment of organic waste gas and desorption regeneration of adsorbent provided by the invention is provided with a steam injection system, a regeneration tank, and an exhaust gas treatment system to perform desorption regeneration in the regeneration tank , Strictly control the temperature and pressure, improve the efficiency and safety of adsorbent desorption regeneration. In the adsorption treatment of organic waste gas and its desorption regeneration process, the harmful substances in the organic waste gas are first adsorbed and removed in the regeneration tank, and when the adsorbent is saturated, the adsorbent is regenerated. The desorption regeneration of the adsorbent includes heating and heating volatilization, high temperature insulation, high temperature desorption or high temperature cracking, carbonization desorption, and finally low temperature purge treatment. A small amount of carbides and residual organic matter are continuously entered into the superheated steam from the activated carbon pore The purge is carried out, so that the adsorbent is activated and regenerated. The temperature value of the adsorbent desorption regeneration is determined according to the characteristics of the organic matter to be processed. There are two situations where there is a cracking requirement or only desorption and no cracking. If there is a cracking requirement, it is set according to the specific cracking temperature of the processed object For the temperature value, set the desorption temperature only when desorption does not crack.
附图说明BRIEF DESCRIPTION
图1是根据本发明第一实施例的有机废气的吸附处理及其吸附剂的脱附再生的设备的整体结构示意图。FIG. 1 is a schematic diagram of the overall structure of an apparatus for adsorption treatment of organic waste gas and desorption regeneration of an adsorbent according to a first embodiment of the present invention.
图2是根据本发明第二实施例的有机废气的吸附处理及其吸附剂的脱附再生的设备的整体结构示意图。2 is a schematic diagram of the overall structure of an apparatus for adsorption treatment of organic waste gas and desorption regeneration of an adsorbent according to a second embodiment of the present invention.
图3是根据本发明第三实施例的有机废气的吸附处理及其吸附剂的脱附再生的设备的整体结构示意图。3 is a schematic diagram of the overall structure of an apparatus for adsorption treatment of organic waste gas and desorption regeneration of an adsorbent according to a third embodiment of the present invention.
其中，101-过热蒸汽发生器，102-主蒸汽管道，103-次级蒸汽管道，2-再生罐，3-冷凝管，301-冷却水入口，302-冷却水出口，4-冷凝水收集槽，5-水泵，6-燃烧室，7-水滴分离器，8-水槽，9-第一阻火器，10-第二阻火器。Among them, 101-superheated steam generator, 102-main steam pipeline, 103-secondary steam pipeline, 2-regeneration tank, 3-condensation pipe, 301-cooling water inlet, 302-cooling water outlet, 4-condensation water collection tank , 5-water pump, 6-combustion chamber, 7-droplet separator, 8-water tank, 9-first flame arrester, 10-second flame arrester.
具体实施方式detailed description
为使本发明的目的、技术方案和优点更加清楚，以下结合附图及具体实施例，对本发明作进一步地详细说明。In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
第一实施例：First embodiment:
如图1所示，本发明提供的一种有机废气的吸附处理及其吸附剂的脱附再生的设备，包括蒸汽喷射***、再生罐2、尾气处理***，所述蒸汽喷射***包括过热蒸汽发生器101、主蒸汽管道102、次级蒸汽管道103和喷嘴。其中，所述再生罐2内设置有的容纳空间且所述容纳空间内设置有若干的次级蒸汽管道103，所述次级蒸汽管道103的一端通过所述主蒸汽管道102连接到所述过热蒸汽发生器101上且另一端设置有所述喷嘴。所述再生罐2上设置有尾气出口和净化气出口且所述净化气出口位于所述再生罐2的下部，所述尾气出口通过尾气管道连接到尾气处理***，有机废气通过第二阻火器10连接到所述再生罐2顶部的废气入口。As shown in FIG. 1, a device for adsorption treatment of organic waste gas and desorption regeneration of an adsorbent provided by the present invention includes a steam injection system, a regeneration tank 2, and an exhaust gas treatment system. The steam injection system includes superheated steam generation 101, main steam pipe 102, secondary steam pipe 103 and nozzle. Wherein, an accommodating space provided in the regeneration tank 2 and a plurality of secondary steam pipes 103 are provided in the accommodating space, and one end of the secondary steam pipe 103 is connected to the superheat through the main steam pipe 102 The steam generator 101 is provided with the nozzle at the other end. The regeneration tank 2 is provided with an exhaust gas outlet and a purified gas outlet, and the purified gas outlet is located at a lower portion of the regeneration tank 2, the exhaust gas outlet is connected to an exhaust gas treatment system through an exhaust gas pipe, and organic waste gas passes through a second flame arrester 10 Connected to the exhaust gas inlet at the top of the regeneration tank 2.
进一步来说，所述次级蒸汽管道103为树状结构。所述再生罐2包括罐体和罐盖，所述罐盖紧密盖合在所述罐体的上方，所述再生罐2的底端设置有排水出口，所述再生罐2的容纳空间内设置有温度感应器和压力感应器。所述主蒸汽管道102和所述尾气管道上设置有阀。Further, the secondary steam pipe 103 has a tree structure. The regeneration tank 2 includes a tank body and a tank lid. The tank lid is tightly closed above the tank body. The bottom end of the regeneration tank 2 is provided with a drainage outlet. The regeneration tank 2 is provided in the accommodation space There are temperature sensors and pressure sensors. Valves are provided on the main steam pipe 102 and the exhaust gas pipe.
在本实施例中，尾气冷凝处理，可用于可裂解碳化的尾气。所述尾气处理***包括冷凝管3、冷凝水收集槽4，所述再生罐2的尾气出口通过尾气管道连接到所述冷凝管3的入口，所述冷凝管3的出口连接到所述冷凝水收集槽4，所述冷凝管3的两端分别设置有冷却水入口301和冷却水出口302。In this embodiment, the tail gas condensation treatment can be used for the crackable carbonized tail gas. The exhaust gas treatment system includes a condenser pipe 3 and a condensate collection tank 4. The exhaust gas outlet of the regeneration tank 2 is connected to the inlet of the condenser pipe 3 through an exhaust gas pipe, and the outlet of the condenser pipe 3 is connected to the condensate water In the collecting tank 4, cooling water inlet 301 and cooling water outlet 302 are respectively provided at both ends of the condenser tube 3.
本实施例提供的一种有机废气的吸附处理及其吸附剂的脱附再生工艺，包括以下步骤：This embodiment provides an organic waste gas adsorption treatment and its adsorbent desorption regeneration process, including the following steps:
第一步，升温加热挥发阶段，吸附剂吸附有机废气饱和后，关闭废气入口和净化气出口，打开主蒸汽管道102和尾气管道上的阀，启动过热蒸汽发生器101，过热水蒸气快速升温至设定温度200～1000℃，经再生罐内预埋的蒸汽喷射***进入到再生罐内，对再生罐内吸附剂加热。尾气管道通到尾气处理***里，再生罐2内的压力保持在0.1～2bar，再生罐2内的温度为200℃～800℃范围，可以根据需要设置。这个具体的设定温度值是根据被处理有机物的特性来确定，有裂解要求的情况就按照被处理对象的特定的裂解温度来设定温度值。The first step is the heating and volatilization stage. After the adsorbent is saturated with organic waste gas, close the waste gas inlet and the purified gas outlet, open the valves on the main steam pipe 102 and the exhaust gas pipe, start the superheated steam generator 101, and the superheated steam quickly heats up To the set temperature of 200 ～ 1000 ℃, the steam injection system pre-buried in the regeneration tank enters the regeneration tank and heats the adsorbent in the regeneration tank. The exhaust gas pipeline leads to the exhaust gas treatment system, the pressure in the regeneration tank 2 is maintained at 0.1 to 2 bar, and the temperature in the regeneration tank 2 is in the range of 200 ° C to 800 ° C, which can be set as required. This specific set temperature value is determined according to the characteristics of the organic matter to be processed. If there is a cracking requirement, the temperature value is set according to the specific cracking temperature of the processed object.
特别的温度为380℃、400℃、600～800℃，380℃可以裂解去除吸附剂中含有的含C的干馏物，400℃可以裂解去除吸附剂中含有的C-O和C-N键的有机化合物，400～800℃可以碳化去除吸附剂中含有的含碳化合物。The special temperature is 380 ℃, 400 ℃, 600 ～ 800 ℃, 380 ℃ can crack to remove the carbon-containing dry distillation contained in the adsorbent, 400 ℃ can crack to remove the organic compounds of CO and CN bond contained in the adsorbent, 400 ~ 800 ℃ can carbonize and remove the carbon compounds contained in the adsorbent.
第二步，保温阶段，当再生罐2内的温度达到设定的温度后，需要持续通入热蒸汽进行保温，保温时间为0.5小时以上，特别的保温时间为1小时。In the second step, the heat preservation stage, when the temperature in the regeneration tank 2 reaches the set temperature, it is necessary to continue to pass hot steam for heat preservation, the heat preservation time is more than 0.5 hours, and the special heat preservation time is 1 hour.
第三步，低温吹扫阶段，保温阶段结束后，将再生罐2内的温度调整到100～200℃，再生罐2内的压力保持在0.1～2bar，低温吹扫的时间为0.2～3小时，特别的低温吹扫阶段的时间为0.2～3小时。少部分碳化物和残留有机物被持续进入的过热水蒸气从活性炭孔隙中吹扫带出来，从而使吸附剂得到活化再生。吹扫完成，关闭主蒸汽管道102上的阀，自然冷却。The third step is the low temperature purge phase. After the heat preservation phase is completed, the temperature in the regeneration tank 2 is adjusted to 100 to 200 ° C, the pressure in the regeneration tank 2 is maintained at 0.1 to 2 bar, and the low temperature purge time is 0.2 to 3 hours The time for the special low-temperature purge stage is 0.2 to 3 hours. A small part of the carbides and residual organics are swept out of the activated carbon pores by the continuously entering superheated steam, so that the adsorbent is activated and regenerated. After the purge is completed, the valve on the main steam pipe 102 is closed to allow natural cooling.
所述吸附剂包括活性炭、活性焦、沸石。The adsorbent includes activated carbon, activated coke, and zeolite.
第二实施例：Second embodiment:
如图2所示，本发明提供的一种有机废气的吸附处理及其吸附剂的脱附再生的设备包括蒸汽喷射***、再生罐2、尾气处理***，所述蒸汽喷射***包括过热蒸汽发生器101、主蒸汽管道102、次级蒸汽管道103和喷嘴。其中，所述 再生罐2内设置有的容纳空间且所述容纳空间内设置有若干的次级蒸汽管道103，所述次级蒸汽管道103的一端通过所述主蒸汽管道102连接到所述过热蒸汽发生器101上且另一端设置有所述喷嘴。所述再生罐2上设置有尾气出口和净化气出口且所述净化气出口位于所述再生罐2的下部，所述尾气出口通过尾气管道连接到尾气处理***，有机废气通过第二阻火器10连接到所述再生罐2顶部的废气入口。As shown in FIG. 2, a device for adsorption treatment and desorption regeneration of organic waste gas provided by the present invention includes a steam injection system, a regeneration tank 2, and an exhaust gas treatment system. The steam injection system includes a superheated steam generator 101, a main steam pipe 102, a secondary steam pipe 103 and a nozzle. Wherein, an accommodating space provided in the regeneration tank 2 and a plurality of secondary steam pipes 103 are provided in the accommodating space, and one end of the secondary steam pipe 103 is connected to the superheat through the main steam pipe 102 The steam generator 101 is provided with the nozzle at the other end. The regeneration tank 2 is provided with an exhaust gas outlet and a purified gas outlet, and the purified gas outlet is located at a lower portion of the regeneration tank 2, the exhaust gas outlet is connected to an exhaust gas treatment system through an exhaust gas pipe, and organic waste gas passes through a second flame arrester 10 Connected to the exhaust gas inlet at the top of the regeneration tank 2.
进一步来说，所述次级蒸汽管道103为树状结构。所述再生罐2包括罐体和罐盖，所述罐盖紧密盖合在所述罐体的上方，所述再生罐2的底端设置有排水出口，所述再生罐2的容纳空间内设置有温度感应器和压力感应器。所述主蒸汽管道102和所述尾气管道上设置有阀。Further, the secondary steam pipe 103 has a tree structure. The regeneration tank 2 includes a tank body and a tank lid. The tank lid is tightly closed above the tank body. The bottom end of the regeneration tank 2 is provided with a drainage outlet. The regeneration tank 2 is provided in the accommodation space There are temperature sensors and pressure sensors. Valves are provided on the main steam pipe 102 and the exhaust gas pipe.
在本实施例中，尾气直接焚烧处理，可用于只需脱附不裂解的尾气。所述尾气处理***包括尾气焚烧处理设备，所述尾气焚烧处理设备包括水滴分离器7、第一阻火器、水槽8和燃烧室6，所述水滴分离器7的气体输出端与所述第一阻火器的输入端连接，所述水滴分离器7的液体输出端与所述水槽8连接，所述水槽8与所述燃烧室6的进水端连通，所述第一阻火器的输出端连接到燃烧室6的进气端，所述再生罐2的尾气出口通过尾气管道连接到所述水滴分离器7上，空气和LNG分别通过空气进口和LNG进口进入所述燃烧室6内，所述燃烧室6的顶部设置有烟囱。In this embodiment, the tail gas is directly incinerated, which can be used to desorb the tail gas without cracking. The tail gas treatment system includes a tail gas incineration treatment equipment, the tail gas incineration treatment equipment includes a water droplet separator 7, a first flame arrester, a water tank 8 and a combustion chamber 6, the gas output end of the water droplet separator 7 and the first The input end of the flame arrester is connected, the liquid output end of the water droplet separator 7 is connected to the water tank 8, the water tank 8 communicates with the water inlet end of the combustion chamber 6, and the output end of the first flame arrester is connected To the intake end of the combustion chamber 6, the exhaust gas outlet of the regeneration tank 2 is connected to the water droplet separator 7 through an exhaust gas pipeline, and air and LNG enter the combustion chamber 6 through the air inlet and the LNG inlet, respectively. The top of the combustion chamber 6 is provided with a chimney.
本实施例提供的一种有机废气的吸附处理及其吸附剂的脱附再生工艺，包括以下步骤：This embodiment provides an organic waste gas adsorption treatment and its adsorbent desorption regeneration process, including the following steps:
第一步，升温加热挥发阶段，吸附剂吸附有机废气饱和后，关闭废气入口和净化气出口，打开主蒸汽管道102和尾气管道上的阀，启动过热蒸汽发生器 101，过热水蒸气快速升温至设定温度200～1000℃，经再生罐内预埋的蒸汽喷射***进入到再生罐内，对再生罐内吸附剂加热。尾气管道通到尾气处理***里，再生罐2内的压力保持在0.1～2bar，再生罐2内的温度为200℃～800℃范围，可以根据需要设置。这个具体的设定温度值是根据被处理有机物的特性来确定，有裂解要求或者只需脱附不要裂解两种情况，有裂解要求的情况就按照被处理对象的特定的裂解温度来设定温度值，只需脱附不要裂解的情况就设定脱附温度。The first step is the heating and volatilization stage. After the adsorbent is saturated with organic waste gas, close the waste gas inlet and purified gas outlet, open the valves on the main steam pipe 102 and the exhaust gas pipe, start the superheated steam generator 101, and the superheated steam quickly heats up To the set temperature of 200 ～ 1000 ℃, the steam injection system pre-buried in the regeneration tank enters the regeneration tank and heats the adsorbent in the regeneration tank. The exhaust gas pipeline leads to the exhaust gas treatment system, the pressure in the regeneration tank 2 is maintained at 0.1 to 2 bar, and the temperature in the regeneration tank 2 is in the range of 200 ° C to 800 ° C, which can be set as required. The specific set temperature value is determined according to the characteristics of the organic matter to be processed. There are two situations where there is a cracking requirement or only desorption and no cracking. If there is a cracking requirement, the temperature is set according to the specific cracking temperature of the processed object Value, set the desorption temperature as long as desorption does not crack.
特别的温度为250℃和340℃，250℃可以去除吸附剂中含有的氧、硫、CO 2、小时 2S等小分子无机物，340℃可以去除吸附剂中含有的脂肪、甲醛等小分子有机物。 Special temperatures are 250 ℃ and 340 ℃. 250 ℃ can remove small molecule inorganic substances such as oxygen, sulfur, CO 2 and hour 2 S contained in adsorbent. Organic matter.
第二步，保温阶段，当再生罐2内的温度达到设定的温度后，需要持续通入热蒸汽进行保温，保温时间为0.5小时以上。In the second step, in the heat preservation stage, when the temperature in the regeneration tank 2 reaches the set temperature, it is necessary to continuously pass hot steam for heat preservation, and the heat preservation time is more than 0.5 hours.
第三步，低温吹扫阶段，保温阶段结束后，将再生罐2内的温度调整到100～200℃，再生罐2内的压力保持在0.1～2bar，低温吹扫的时间为0.2～3小时，特别的低温吹扫阶段的时间为0.2～3小时。少部分碳化物和残留有机物被持续进入的过热水蒸气从活性炭孔隙中吹扫带出来，从而使吸附剂得到活化再生。吹扫完成，关闭主蒸汽管道，自然冷却。The third step is the low temperature purge phase. After the heat preservation phase is completed, the temperature in the regeneration tank 2 is adjusted to 100 to 200 ° C, the pressure in the regeneration tank 2 is maintained at 0.1 to 2 bar, and the low temperature purge time is 0.2 to 3 hours The time for the special low-temperature purge stage is 0.2 to 3 hours. A small part of the carbides and residual organics are swept out of the activated carbon pores by the continuously entering superheated steam, so that the adsorbent is activated and regenerated. After purging, close the main steam pipe and let it cool naturally.
所述吸附剂包括活性炭、活性焦、沸石。The adsorbent includes activated carbon, activated coke, and zeolite.
第三实施例：Third embodiment:
如图3所示，本发明提供的一种有机废气的吸附处理及其吸附剂的脱附再生的设备包括蒸汽喷射***、再生罐2、尾气处理***，所述蒸汽喷射***包括过热蒸汽发生器101、主蒸汽管道102、次级蒸汽管道103和喷嘴。其中，所述 再生罐2内设置有的容纳空间且所述容纳空间内设置有若干的次级蒸汽管道103，所述次级蒸汽管道103的一端通过所述主蒸汽管道102连接到所述过热蒸汽发生器101上且另一端设置有所述喷嘴。所述再生罐2上设置有尾气出口和净化气出口且所述净化气出口位于所述再生罐2的下部，所述尾气出口通过尾气管道连接到尾气处理***，有机废气通过第二阻火器10连接到所述再生罐2顶部的废气入口。As shown in FIG. 3, a device for adsorption treatment of organic waste gas and desorption regeneration of an adsorbent provided by the present invention includes a steam injection system, a regeneration tank 2, and an exhaust gas treatment system. The steam injection system includes a superheated steam generator 101, a main steam pipe 102, a secondary steam pipe 103 and a nozzle. Wherein, an accommodating space provided in the regeneration tank 2 and a plurality of secondary steam pipes 103 are provided in the accommodating space, and one end of the secondary steam pipe 103 is connected to the superheat through the main steam pipe 102 The steam generator 101 is provided with the nozzle at the other end. The regeneration tank 2 is provided with an exhaust gas outlet and a purified gas outlet, and the purified gas outlet is located at a lower portion of the regeneration tank 2, the exhaust gas outlet is connected to an exhaust gas treatment system through an exhaust gas pipe, and organic waste gas passes through a second flame arrester 10 Connected to the exhaust gas inlet at the top of the regeneration tank 2.
进一步来说，所述次级蒸汽管道103为树状结构。所述再生罐2包括罐体和罐盖，所述罐盖紧密盖合在所述罐体的上方，所述再生罐2的底端设置有排水出口，所述再生罐2的容纳空间内设置有温度感应器和压力感应器。所述主蒸汽管道102和所述尾气管道上设置有阀。Further, the secondary steam pipe 103 has a tree structure. The regeneration tank 2 includes a tank body and a tank lid. The tank lid is tightly closed above the tank body. The bottom end of the regeneration tank 2 is provided with a drainage outlet. The regeneration tank 2 is provided in the accommodation space There are temperature sensors and pressure sensors. Valves are provided on the main steam pipe 102 and the exhaust gas pipe.
在本实施例中，尾气先冷凝再焚烧，所述尾气处理***包括冷凝管3、冷凝水收集槽4、水泵5、汽化装置、尾气焚烧处理设备，所述汽化装置设置在所述冷凝水收集槽4和所述尾气焚烧处理设备之间，所述尾气焚烧处理设备包括水滴分离器7、第一阻火器、水槽8和燃烧室6，所述水滴分离器7的气体输出端与所述第一阻火器的输入端连接，所述水滴分离器7的液体输出端与所述水槽8连接，所述水槽8与所述燃烧室6的进水端连通，所述第一阻火器的输出端连接到燃烧室6的进气端，所述再生罐2的尾气出口通过尾气管道连接到所述冷凝管3的入口，所述冷凝管3的出口连接到所述冷凝水收集槽4，所述冷凝管3的两端分别设置有冷却水入口301和冷却水出口302，所述冷凝水收集槽4内的冷凝水通过所述水泵5输送到汽化装置最后进入所述水滴分离器7上，空气和LNG分别通过空气进口和LNG进口进入所述燃烧室6内，所述燃烧室6的顶部设置有烟囱。In this embodiment, the exhaust gas is first condensed and then incinerated. The exhaust gas treatment system includes a condenser pipe 3, a condensed water collection tank 4, a water pump 5, a vaporization device, and an exhaust gas incineration treatment device. Between the tank 4 and the tail gas incineration processing equipment, the tail gas incineration processing equipment includes a water droplet separator 7, a first flame arrester, a water tank 8 and a combustion chamber 6, the gas output end of the water droplet separator 7 and the first The input end of a flame arrester is connected, the liquid output end of the water droplet separator 7 is connected to the water tank 8, the water tank 8 communicates with the water inlet end of the combustion chamber 6, and the output end of the first flame arrester Connected to the intake end of the combustion chamber 6, the exhaust gas outlet of the regeneration tank 2 is connected to the inlet of the condenser pipe 3 through an exhaust gas pipe, and the outlet of the condenser pipe 3 is connected to the condensate collection tank 4, the Cooling water inlet 301 and cooling water outlet 302 are provided at both ends of the condenser tube 3 respectively. The condensate in the condensate collecting tank 4 is sent to the vaporizing device through the water pump 5 and finally enters the water droplet separator 7, air And LNG respectively Gas inlet and LNG import into the combustion chamber 6, the top of the combustion chamber 6 is provided with a chimney.
本实施例型提供的一种有机废气的吸附处理及其吸附剂的脱附再生工艺，包括以下步骤：This embodiment provides an organic waste gas adsorption treatment and its adsorbent desorption regeneration process, including the following steps:
第一步，升温加热挥发阶段，吸附剂吸附有机废气饱和后，关闭废气入口和净化气出口，打开主蒸汽管道102和尾气管道上的阀，启动过热蒸汽发生器101，过热水蒸气快速升温至设定温度200～1000℃，经再生罐内预埋的蒸汽喷射***进入到再生罐内，对再生罐内吸附剂加热。尾气管道通到尾气处理***里，再生罐2内的压力保持在0.1～2bar，再生罐2内的温度为200℃～800℃范围，可以根据需要设置。这个具体的设定温度值是根据被处理有机物的特性来确定，只需脱附不要裂解的情况就设定脱附温度。The first step is the heating and volatilization stage. After the adsorbent is saturated with organic waste gas, close the waste gas inlet and the purified gas outlet, open the valves on the main steam pipe 102 and the exhaust gas pipe, start the superheated steam generator 101, and the superheated steam quickly heats up To the set temperature of 200 ～ 1000 ℃, the steam injection system pre-buried in the regeneration tank enters the regeneration tank and heats the adsorbent in the regeneration tank. The exhaust gas pipeline leads to the exhaust gas treatment system, the pressure in the regeneration tank 2 is maintained at 0.1 to 2 bar, and the temperature in the regeneration tank 2 is in the range of 200 ° C to 800 ° C, which can be set as required. This specific set temperature value is determined according to the characteristics of the processed organic matter, and the desorption temperature can be set only when desorption does not crack.
特别的温度为380℃、400℃、600～800℃，380℃可以裂解去除吸附剂中含有的含C的干馏物，400℃可以裂解去除吸附剂中含有的C-O和C-N键的有机化合物，400～800℃可以碳化去除吸附剂中含有的含碳化合物。The special temperature is 380 ℃, 400 ℃, 600 ～ 800 ℃, 380 ℃ can crack to remove the carbon-containing dry distillation contained in the adsorbent, 400 ℃ can crack to remove the organic compounds of CO and CN bond contained in the adsorbent, 400 ~ 800 ℃ can carbonize and remove the carbon compounds contained in the adsorbent.
第二步，保温阶段，当再生罐2内的温度达到设定的温度后，需要持续通入热蒸汽进行保温，保温时间为0.5小时以上，特别的保温时间为0.5小时。In the second step, in the heat preservation stage, when the temperature in the regeneration tank 2 reaches the set temperature, it is necessary to continuously pass hot steam for heat preservation.
第三步，低温吹扫阶段，保温阶段结束后，将再生罐2内的温度调整到100～200℃，再生罐2内的压力保持在0.1～2bar，低温吹扫的时间为0.2～3小时，特别的低温吹扫阶段的时间为0.2～3小时。少部分碳化物和残留有机物被持续进入的过热水蒸气从活性炭孔隙中吹扫带出来，从而使吸附剂得到活化再生。吹扫完成，关闭主蒸汽管道上的阀，自然冷却。The third step is the low temperature purge phase. After the heat preservation phase is completed, the temperature in the regeneration tank 2 is adjusted to 100 to 200 ° C, the pressure in the regeneration tank 2 is maintained at 0.1 to 2 bar, and the low temperature purge time is 0.2 to 3 hours The time for the special low-temperature purge stage is 0.2 to 3 hours. A small part of the carbides and residual organics are swept out of the activated carbon pores by the continuously entering superheated steam, so that the adsorbent is activated and regenerated. After purging is completed, close the valve on the main steam pipe and let it cool naturally.
所述吸附剂包括活性炭、活性焦、沸石。The adsorbent includes activated carbon, activated coke, and zeolite.
综上所述，本发明提供的一种有机废气的吸附处理及其吸附剂的脱附再生的设备通过设置蒸汽喷射***、再生罐、尾气处理***，将脱附再生在再生罐 进行，严格控制温度和压力，提高了吸附剂脱附再生的效率和使用安全性。在有机废气的吸附处理及其吸附剂的脱附再生工艺中，先将有机废气中的有害物质在再生罐中吸附去除，当吸附剂饱和后对吸附剂进行再生处理。吸附剂的脱附再生包括升温加热挥发、再高温保温、高温脱附或高温裂解、碳化脱附，最后低温吹扫处理少部分碳化物和残留有机物被持续进入的过热水蒸气从活性炭孔隙中吹扫带出来，从而使吸附剂得到活化再生。吸附剂脱附再生的温度值是根据被处理有机物的特性来确定，有裂解要求或者只需脱附不要裂解两种情况，有裂解要求的情况就按照被处理对象的特定的裂解温度来设定温度值，只需脱附不要裂解的情况就设定脱附温度。In summary, the device for adsorption treatment and desorption regeneration of organic waste gas provided by the present invention is provided with a steam injection system, a regeneration tank, and an exhaust gas treatment system to perform desorption regeneration in the regeneration tank, and is strictly controlled Temperature and pressure improve the efficiency and safety of adsorbent desorption regeneration. In the adsorption treatment of organic waste gas and its desorption regeneration process, the harmful substances in the organic waste gas are first adsorbed and removed in the regeneration tank, and when the adsorbent is saturated, the adsorbent is regenerated. The desorption regeneration of the adsorbent includes heating and heating volatilization, high temperature insulation, high temperature desorption or high temperature cracking, carbonization desorption, and finally low temperature purge treatment. A small amount of carbides and residual organic matter are continuously entered into the superheated steam from the activated carbon pores The purge is carried out, so that the adsorbent is activated and regenerated. The temperature value of the adsorbent desorption regeneration is determined according to the characteristics of the organic matter to be processed. There are two situations where there is a cracking requirement or only desorption and no cracking. For the temperature value, set the desorption temperature only when desorption does not crack.
以上所述仅为本发明的实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的权利要求范围之内。The above are only the embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims (6)

  1. 一种有机废气的吸附处理及其吸附剂的脱附再生的设备，其特征在于，包括蒸汽喷射***、再生罐(2)、尾气处理***，所述蒸汽喷射***包括过热蒸汽发生器(101)、主蒸汽管道(102)、次级蒸汽管道(103)和喷嘴，所述再生罐(2)内设置有的容纳空间且所述容纳空间内设置有若干的次级蒸汽管道(103)，所述次级蒸汽管道(103)的一端通过所述主蒸汽管道(102)连接到所述过热蒸汽发生器(101)上且另一端设置有所述喷嘴，所述再生罐(2)上设置有尾气出口和净化气出口且所述净化气出口位于所述再生罐(2)的下部，所述尾气出口通过尾气管道连接到尾气处理***，有机废气通过第二阻火器(10)连接到所述再生罐(2)顶部的废气入口。A device for adsorption treatment of organic waste gas and desorption and regeneration of its adsorbent, characterized in that it includes a steam injection system, a regeneration tank (2), an exhaust gas treatment system, and the steam injection system includes a superheated steam generator (101) , A main steam pipe (102), a secondary steam pipe (103) and a nozzle, an accommodation space provided in the regeneration tank (2) and a number of secondary steam pipes (103) are provided in the accommodation space, so One end of the secondary steam pipe (103) is connected to the superheated steam generator (101) through the main steam pipe (102) and the nozzle is provided at the other end, and the regeneration tank (2) is provided with An exhaust gas outlet and a purified gas outlet and the purified gas outlet is located at the lower part of the regeneration tank (2), the exhaust gas outlet is connected to an exhaust gas treatment system through an exhaust gas pipeline, and the organic waste gas is connected to the exhaust gas through a second flame arrester (10) Exhaust gas inlet at the top of the regeneration tank (2).
  2. 一种有机废气的吸附处理及其吸附剂的脱附再生工艺，其特征在于，包括以下步骤：An adsorption process of organic waste gas and a desorption regeneration process of its adsorbent, characterized in that it includes the following steps:
    第一步，升温加热挥发阶段，吸附剂吸附有机废气饱和后，关闭废气入口和净化气出口，打开主蒸汽管道(102)和尾气管道上的阀，启动过热蒸汽发生器(101)将热蒸汽通入再生罐(2)中，尾气管道通到尾气处理***里，再生罐(2)内的压力保持在0.1～2bar，再生罐(2)内的温度为200℃～800℃范围，可以根据需要设置；The first step is the heating and volatilization phase. After the adsorbent is saturated with organic waste gas, close the waste gas inlet and purified gas outlet, open the valves on the main steam pipe (102) and the exhaust gas pipe, and start the superheated steam generator (101) to heat the steam Pass into the regeneration tank (2), the exhaust gas pipeline leads to the exhaust gas treatment system, the pressure in the regeneration tank (2) is maintained at 0.1 ~ 2bar, the temperature in the regeneration tank (2) is in the range of 200 ℃ ~ 800 ℃, according to Need to set up;
    第二步，保温阶段，当再生罐(2)内的温度达到设定的温度后，需要持续通入热蒸汽进行保温，保温时间为0.5小时以上；The second step, the heat preservation stage, when the temperature in the regeneration tank (2) reaches the set temperature, it is necessary to continuously pass hot steam for heat preservation, and the heat preservation time is more than 0.5 hours;
    第三步，低温吹扫阶段，保温阶段结束后，将再生罐(2)内的温度调整到100～200℃，再生罐(2)内的压力保持在0.1～2bar，低温吹扫的时间为0.2～3小时。The third step is the low temperature purge stage. After the heat preservation stage is completed, the temperature in the regeneration tank (2) is adjusted to 100-200 ° C, the pressure in the regeneration tank (2) is maintained at 0.1-2 bar, and the low-temperature purge time is 0.2 to 3 hours.
  3. 如权利要求2所述的有机废气的吸附处理及其吸附剂的脱附再生的设备，其特征在于，在所述第一步中再生罐(2)内的温度为250℃、340℃、380℃、400℃、450℃、600℃、800℃。The device for adsorption treatment of organic waste gas and desorption regeneration of adsorbent according to claim 2, wherein the temperature in the regeneration tank (2) in the first step is 250 ° C, 340 ° C, 380 ℃, 400 ℃, 450 ℃, 600 ℃, 800 ℃.
  4. 如权利要求2所述的有机废气的吸附处理及其吸附剂的脱附再生的设备，其特征在于，在所述第二步中保温时间为0.5～24小时。The device for adsorption treatment of organic waste gas and desorption regeneration of adsorbent according to claim 2, characterized in that, in the second step, the holding time is 0.5 to 24 hours.
  5. 如权利要求2所述的有机废气的吸附处理及其吸附剂的脱附再生的设备，其特征在于，在所述第三步中低温吹扫阶段的时间为0.2～3小时。The device for adsorption treatment of organic waste gas and its desorption regeneration of adsorbent according to claim 2, characterized in that the time of the low-temperature purge stage in the third step is 0.2 to 3 hours.
  6. 如权利要求2～5任一所述的有机废气的吸附处理及其吸附剂的脱附再生的设备，其特征在于，所述吸附剂包括活性炭、活性焦、沸石。The device for adsorption treatment of organic waste gas and desorption regeneration of an adsorbent according to any one of claims 2 to 5, wherein the adsorbent includes activated carbon, activated coke, and zeolite.
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