CN111001260A - Organic waste gas recovery system - Google Patents
Organic waste gas recovery system Download PDFInfo
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- CN111001260A CN111001260A CN201911385621.5A CN201911385621A CN111001260A CN 111001260 A CN111001260 A CN 111001260A CN 201911385621 A CN201911385621 A CN 201911385621A CN 111001260 A CN111001260 A CN 111001260A
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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
- B01D53/04—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 with stationary adsorbents
- B01D53/0407—Constructional details of adsorbing systems
- B01D53/0415—Beds in cartridges
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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
- B01D53/002—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 condensation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
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- 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
- B01D2259/40003—Methods relating to valve switching
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- 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
- B01D2259/40007—Controlling pressure or temperature swing adsorption
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- 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
- B01D2259/402—Further details for adsorption processes and devices using two beds
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- 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
- B01D2259/416—Further details for adsorption processes and devices involving cryogenic temperature treatment
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- Separation Of Gases By Adsorption (AREA)
Abstract
The invention discloses an organic waste gas recovery system, which comprises a first adsorption bed, a second adsorption bed, a heating assembly, an adsorption assembly, a desorption assembly and a cooling assembly, and is characterized in that a first steam inlet is communicated with an output port of an external cooling water device through a first water inlet pipe, a second steam inlet is communicated with an output port of the external cooling water device through a second water inlet pipe, a first steam outlet is communicated with a first drain pipe, a second steam outlet is communicated with a second drain pipe, and the desorption assembly comprises a first desorption inlet control valve, a first desorption outlet control valve, a second desorption inlet control valve, a second desorption outlet control valve, a vacuum pump, a first condenser, a first gas-liquid separator, a booster fan, a second condenser, a second gas-liquid separator, a storage tank and a self-operated regulating valve; the advantage is that single desorption process is higher to organic substance's recovery efficiency to promote whole economic benefits, the cooling efficiency is high in the desorption process, effective reduce cost and safe in utilization.
Description
Technical Field
The invention relates to a waste gas recovery system, in particular to an organic waste gas recovery system.
Background
Most of the existing organic waste gas recovery technologies adopt activated carbon adsorption, and steam is directly introduced into an activated carbon adsorption bed to heat and analyze the activated carbon, wherein two adsorption beds are generally arranged to alternately perform adsorption and desorption; however, after the desorption process, in order to avoid the separation of the welding line of the adsorption bed caused by too large temperature difference, usually, the desorbed mixed gas is cooled after heat exchange through a cooler, and then is introduced into the adsorption bed for circulating cooling until the temperature inside the adsorption bed is reduced to the normal temperature, so as to switch to the adsorption mode, and the cooling mode has low cooling efficiency and long time consumption, thereby increasing the operation cost; the adsorption bed can produce the adsorption heat when adsorption work, in case control is not good, has the potential safety hazard of catching fire easily, and current adsorption bed structure leads to adsorption work and cooling work to go on simultaneously owing to often adopt cooling blower circulative cooling behind desorption work, consequently can not be fine solution this problem, in case the adsorption bed is on fire, can bring great economic loss for the user.
After the vacuum and heating power indirect heating dual active carbon desorption regeneration recovery technology is adopted, the desorbed organic solvent is taken out of the adsorption bed in a vacuumizing mode, the desorption efficiency is greatly improved, however, the mixed gas discharged by the adsorption bed in the desorption work at present is only condensed by a simple condenser and then enters a storage tank for storage, and the recovery efficiency of organic substances in the single desorption process is lower.
Disclosure of Invention
The invention aims to solve the technical problem of providing an organic waste gas recovery system which has high desorption efficiency and cooling efficiency, low operation cost and safe use, and the organic waste gas recovery system has high organic substance recovery efficiency in a single desorption process.
The technical scheme adopted by the invention for solving the technical problems is as follows: an organic waste gas recovery system comprises a first adsorption bed, a second adsorption bed, a heating component, an adsorption component, a desorption component and a cooling component, wherein the heating component comprises a first steam coil pipe arranged in the first adsorption bed and a second steam coil pipe arranged in the second adsorption bed, the first steam coil pipe is provided with a first steam inlet and a first steam outlet, the second steam coil pipe is provided with a second steam inlet and a second steam outlet, the first steam inlet is communicated with an output port of an external steam input device through a first steam inlet pipe provided with a first steam inlet control valve, the second steam inlet is communicated with an output port of the external steam input device through a second steam inlet pipe provided with a second steam inlet control valve, the first steam outlet is communicated with a first steam exhaust pipe provided with a first steam exhaust control valve, the second steam outlet is communicated with a second steam exhaust pipe provided with a second steam exhaust control valve, the first steam inlet is communicated with an output port of an external cooling water device through a first water inlet pipe provided with a first water inlet control valve, the second steam inlet is communicated with an output port of the external cooling water device through a second water inlet pipe provided with a second water inlet control valve, the first steam outlet is communicated with the first water exhaust pipe provided with the first water exhaust control valve, and the second steam outlet is communicated with a second water exhaust pipe provided with the second water exhaust control valve;
the desorption component comprises a first desorption inlet control valve, a first desorption outlet control valve, a second desorption inlet control valve, a second desorption outlet control valve, a vacuum pump, a first condenser, a first gas-liquid separator, a booster fan, a second condenser, a second gas-liquid separator, a storage tank and a self-operated regulating valve, wherein the input port of the first adsorption bed is communicated with the first desorption outlet control valve, the input port and the output port of the vacuum pump, the first condenser, the input port of the first gas-liquid separator, the gas outlet of the first gas-liquid separator, the input port and the output port of the booster fan, the second condenser, the input port of the second gas-liquid separator, the gas outlet of the second gas-liquid separator, the self-operated regulating valve, the first desorption inlet control valve and the output port of the first adsorption bed in sequence through pipelines, forming a desorption loop of the first adsorption bed, wherein the input port of the second adsorption bed is communicated with the second desorption outlet control valve, the input port and the output port of the vacuum pump, the first condenser, the input port of the first gas-liquid separator, the gas outlet of the first gas-liquid separator, the input port and the output port of the booster fan, the second condenser, the input port of the second gas-liquid separator, the gas outlet of the second gas-liquid separator, the self-operated regulating valve, the second desorption inlet control valve and the output port of the second adsorption bed in sequence through pipelines to form the desorption loop of the second adsorption bed, the liquid outlet of the first gas-liquid separator and the liquid outlet of the second gas-liquid separator are respectively communicated with the inside of the storage tank through pipelines.
The adsorption component comprises a first adsorption inlet control valve, a first adsorption outlet control valve, a second adsorption inlet control valve, a second adsorption outlet control valve and a first fan, the input port of the first adsorption bed is communicated with the first adsorption inlet control valve and the external organic waste gas input port in turn through a pipeline, the output port of the first adsorption bed is communicated with the first adsorption outlet control valve and the input port of the first fan in turn through pipelines, the input port of the second adsorption bed is communicated with the second adsorption inlet control valve and the external organic waste gas input port in turn through a pipeline, the delivery outlet of the second adsorption bed is communicated with the second adsorption outlet control valve and the input port of the first fan in sequence through pipelines, and the delivery outlet of the first fan is communicated with an external waste gas treatment device. First adsorption bed and the circulation in turn of second adsorption bed carry out adsorption work and desorption work, and when first adsorption bed adsorption work promptly, the second adsorption bed carries out desorption work, and the second adsorption bed adsorption work during, first adsorption bed carries out desorption work to guarantee to continuously adsorb and discharge outside organic waste gas, work efficiency is higher.
The cooling assembly comprises a cooler, a second fan, a first cooling inlet control valve, a first cooling outlet control valve, a second cooling inlet control valve and a second cooling outlet control valve, wherein an input port of the first adsorption bed is sequentially communicated with the first cooling outlet control valve, the cooler, an input port and an output port of the second fan, the first cooling inlet control valve and an output port of the first adsorption bed through pipelines to form a cooling loop of the first adsorption bed, and an input port of the second adsorption bed is sequentially communicated with the second cooling outlet control valve, the cooler, an input port and an output port of the second fan, the second cooling inlet control valve and an output port of the second adsorption bed through pipelines to form a cooling loop of the second adsorption bed.
Compared with the prior art, the invention has the advantages that the first steam inlet is communicated with the output port of the external cooling water device through a first water inlet pipe provided with a first water inlet control valve, the second steam inlet is communicated with the output port of the external cooling water device through a second water inlet pipe provided with a second water inlet control valve, the first steam outlet is communicated with a first water discharge pipe provided with a first water discharge control valve, and the second steam outlet is communicated with a second water discharge pipe provided with a second water discharge control valve, wherein the first water discharge pipe and the second water discharge pipe can be directly discharged or can be connected into the external cooling water device for circulating cooling; when the desorption operation is finished, the temperature range of the desorption operation is generally 100-120 ℃, the temperature of mixed gas subjected to heat exchange and cooling by the first cooler outside the adsorption bed is not greatly different from the temperature range of the desorption operation, so that the welding line inside the adsorption bed can be effectively protected, the temperature range of cooling water conveyed by the external cooling water device is generally 25-30 ℃, and in the cooling operation of the second stage, the cooling water is directly positioned in the steam coil inside the adsorption bed to cool the inside of the adsorption bed, therefore, the environment in the adsorption bed after the primary cooling operation of the first stage is carried out to the set first cooling temperature can be rapidly cooled until the set second cooling temperature is reached, so that the overall cooling time is shortened, the cooling efficiency is greatly improved, and the operation cost is greatly reduced;
the existing first steam coil and the existing second steam coil are utilized in the second-stage cooling work, so that the existing structure is not greatly changed, and the installation and the forming are convenient and quick;
when the adsorption bed is switched to perform adsorption work, cooling water is continuously introduced into the corresponding steam coil for cooling, and heat generated during the adsorption work is absorbed, so that not only is the adsorption efficiency effectively improved, but also the adsorption bed is ensured to work below a safe temperature, and the use safety is improved;
when an adsorption bed is in adsorption work, another adsorption bed is in desorption during operation, carry out evacuation work to the adsorption bed that is in desorption work through the vacuum pump, cooperation through self-operated governing valve, make this adsorption bed inside be in negative pressure environment, can improve desorption efficiency, and the one side that is located the delivery outlet of vacuum pump passes through the booster fan and cooperates the pressure boost effect down with self-operated governing valve jointly, organic substance condenses more easily in the gas mixture that makes to get into in the second condenser, liquid after the condensation is stored in getting into the storage tank from second vapour and liquid separator's liquid outlet, further increase single desorption in-process and retrieve efficiency to organic substance, thereby promote whole economic benefits.
Drawings
Fig. 1 is a schematic diagram of the structure of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
An organic waste gas recovery system comprises a first adsorption bed 1, a second adsorption bed 2, a heating component, an adsorption component, a desorption component and a cooling component, wherein the heating component comprises a first steam coil 11 arranged in the first adsorption bed 1 and a second steam coil 21 arranged in the second adsorption bed 2, the first steam coil 11 is provided with a first steam inlet 111 and a first steam outlet 112, the second steam coil 21 is provided with a second steam inlet 211 and a second steam outlet 212, the first steam inlet 111 is communicated with an output port of an external steam input device (not shown) through a first steam inlet pipe 12 provided with a first steam inlet control valve 121, the second steam inlet 211 is communicated with an output port of the external steam input device through a second steam inlet pipe 22 provided with a second steam inlet control valve 221, the first steam outlet 112 is communicated with a first steam outlet pipe 13 provided with a first steam outlet control valve 131, the second steam outlet 212 is communicated with a second steam exhaust pipe 23 provided with a second steam exhaust control valve 231, the first steam inlet 111 is communicated with an output port of an external cooling water device (not shown) through a first water inlet pipe 14 provided with a first water inlet control valve 141, the second steam inlet 211 is communicated with an output port of the external cooling water device through a second water inlet pipe 24 provided with a second water inlet control valve 241, the first steam outlet 112 is communicated with a first water exhaust pipe 15 provided with a first water exhaust control valve 151, and the second steam outlet 212 is communicated with a second water exhaust pipe 25 provided with a second water exhaust control valve 251;
the desorption component comprises a first desorption inlet control valve 16, a first desorption outlet control valve 17, a second desorption inlet control valve 26, a second desorption outlet control valve 27, a vacuum pump 31, a first condenser 32, a first gas-liquid separator 33, a booster fan 34, a second condenser 35, a second gas-liquid separator 36, a storage tank 37 and a self-operated regulating valve 38, wherein the input port of the first adsorption bed 1 is sequentially communicated with the input port and the output port of the first desorption outlet control valve 17, the input port and the output port of the vacuum pump 31, the first condenser 32, the input port of the first gas-liquid separator 33, the air outlet of the first gas-liquid separator 33, the input port and the output port of the booster fan 34, the second condenser 35, the input port of the second gas-liquid separator 36, the air outlet of the second gas-liquid separator 36, the self-operated regulating valve 38, the first desorption inlet control valve 16 and the output port, the input port of the second adsorption bed 2 is sequentially communicated with the second desorption outlet control valve 27, the input port and the output port of the vacuum pump 31, the first condenser 32, the input port of the first gas-liquid separator 33, the gas outlet of the first gas-liquid separator 33, the input port and the output port of the booster fan 34, the second condenser 35, the input port of the second gas-liquid separator 36, the gas outlet of the second gas-liquid separator 36, the self-operated regulating valve 38, the second desorption inlet control valve 26 and the output port of the second adsorption bed 2 through pipelines to form a desorption loop of the second adsorption bed 2, and the liquid outlet of the first gas-liquid separator 33 and the liquid outlet of the second gas-liquid separator 36 are respectively communicated with the inside of the storage tank 37 through pipelines.
The adsorption component comprises a first adsorption inlet control valve 41, a first adsorption outlet control valve 42, a second adsorption inlet control valve 43, a second adsorption outlet control valve 44 and a first fan 45, wherein an input port of the first adsorption bed 1 is sequentially communicated with the first adsorption inlet control valve 41 and an external organic waste gas input port (not shown) through a pipeline, an output port of the first adsorption bed 1 is sequentially communicated with the first adsorption outlet control valve 42 and an input port of the first fan 45 through a pipeline, an input port of the second adsorption bed 2 is sequentially communicated with the second adsorption inlet control valve 43 and an external organic waste gas input port through a pipeline, an output port of the second adsorption bed 2 is sequentially communicated with an input port of the second adsorption outlet control valve 44 and an input port of the first fan 45 through a pipeline, and an output port of the first fan 45 is communicated with an external waste gas treatment device (not shown).
The cooling assembly comprises a cooler 51, a second fan 52, a first cooling inlet control valve 53, a first cooling outlet control valve 54, a second cooling inlet control valve 55 and a second cooling outlet control valve 56, wherein an input port of the first adsorption bed 1 is sequentially communicated with the first cooling outlet control valve 54, the cooler 51, an input port and an output port of the second fan 52, the first cooling inlet control valve 53 and an output port of the first adsorption bed 1 through pipelines to form a cooling loop of the first adsorption bed 1, and an input port of the second adsorption bed 2 is sequentially communicated with the second cooling outlet control valve 56, the cooler 51, an input port and an output port of the second fan 52, the second cooling inlet control valve 55 and an output port of the second adsorption bed 2 through pipelines to form a cooling loop of the second adsorption bed 2.
Claims (3)
1. An organic waste gas recovery system comprises a first adsorption bed, a second adsorption bed, a heating component, an adsorption component, a desorption component and a cooling component, wherein the heating component comprises a first steam coil pipe arranged in the first adsorption bed and a second steam coil pipe arranged in the second adsorption bed, the first steam coil pipe is provided with a first steam inlet and a first steam outlet, the second steam coil pipe is provided with a second steam inlet and a second steam outlet, the first steam inlet is communicated with an output port of an external steam input device through a first steam inlet pipe provided with a first steam inlet control valve, the second steam inlet is communicated with an output port of the external steam input device through a second steam inlet pipe provided with a second steam inlet control valve, the first steam outlet is communicated with a first steam exhaust pipe provided with a first steam exhaust control valve, the second steam outlet is communicated with a second steam exhaust pipe provided with a second steam exhaust control valve, and the second steam outlet is communicated with a second water exhaust pipe provided with a second steam exhaust control valve;
the desorption component comprises a first desorption inlet control valve, a first desorption outlet control valve, a second desorption inlet control valve, a second desorption outlet control valve, a vacuum pump, a first condenser, a first gas-liquid separator, a booster fan, a second condenser, a second gas-liquid separator, a storage tank and a self-operated regulating valve, wherein the input port of the first adsorption bed is communicated with the first desorption outlet control valve, the input port and the output port of the vacuum pump, the first condenser, the input port of the first gas-liquid separator, the gas outlet of the first gas-liquid separator, the input port and the output port of the booster fan, the second condenser, the input port of the second gas-liquid separator, the gas outlet of the second gas-liquid separator, the self-operated regulating valve, the first desorption inlet control valve and the output port of the first adsorption bed in sequence through pipelines, forming a desorption loop of the first adsorption bed, wherein the input port of the second adsorption bed is communicated with the second desorption outlet control valve, the input port and the output port of the vacuum pump, the first condenser, the input port of the first gas-liquid separator, the gas outlet of the first gas-liquid separator, the input port and the output port of the booster fan, the second condenser, the input port of the second gas-liquid separator, the gas outlet of the second gas-liquid separator, the self-operated regulating valve, the second desorption inlet control valve and the output port of the second adsorption bed in sequence through pipelines to form the desorption loop of the second adsorption bed, the liquid outlet of the first gas-liquid separator and the liquid outlet of the second gas-liquid separator are respectively communicated with the inside of the storage tank through pipelines.
2. The organic waste gas recovery system according to claim 1, wherein the adsorption module comprises a first adsorption inlet control valve, a first adsorption outlet control valve, a second adsorption inlet control valve, a second adsorption outlet control valve and a first fan, the inlet of the first adsorption bed is sequentially communicated with the first adsorption inlet control valve and the external organic waste gas inlet through a pipeline, the outlet of the first adsorption bed is sequentially communicated with the first adsorption outlet control valve and the inlet of the first fan through a pipeline, the inlet of the second adsorption bed is sequentially communicated with the second adsorption inlet control valve and the external organic waste gas inlet through a pipeline, the outlet of the second adsorption bed is sequentially communicated with the second adsorption outlet control valve and the inlet of the first fan through a pipeline, the output port of the first fan is communicated with an external waste gas treatment device.
3. The organic waste gas recovery system according to claim 2, wherein the cooling module includes a cooler, a second fan, a first cooling inlet control valve, a first cooling outlet control valve, a second cooling inlet control valve, and a second cooling outlet control valve, the input port of the first adsorption bed is communicated with the first cooling outlet control valve, the cooler, the input port and the output port of the second fan, the first cooling inlet control valve and the output port of the first adsorption bed in turn through pipelines to form a cooling loop of the first adsorption bed, and the input port of the second adsorption bed is communicated with the second cooling outlet control valve, the cooler, the input port and the output port of the second fan, the second cooling inlet control valve and the output port of the second adsorption bed in sequence through pipelines to form a cooling loop of the second adsorption bed.
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| CN201911385621.5A CN111001260A (en) | 2019-12-29 | 2019-12-29 | Organic waste gas recovery system |
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| CN101091861A (en) * | 2007-04-06 | 2007-12-26 | 刘向建 | Method for recovering volatile organic compound by using adsorbent bed of active carbon |
| CN202876608U (en) * | 2012-10-25 | 2013-04-17 | 宁波中瑞环保科技有限公司 | Organic waste gas adsorption and vacuum desorption recycling device |
| CN105126536A (en) * | 2015-08-10 | 2015-12-09 | 新奥气化采煤有限公司 | Natural gas purification device, purification system, treatment system and adsorbent regeneration method |
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2019
- 2019-12-29 CN CN201911385621.5A patent/CN111001260A/en active Pending
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|---|---|---|---|---|
| EP0057781A1 (en) * | 1981-02-05 | 1982-08-18 | John Zink Company | Process and apparatus for recovering hydrocarbons from air-hydrocarbon vapour mixtures |
| CN101091861A (en) * | 2007-04-06 | 2007-12-26 | 刘向建 | Method for recovering volatile organic compound by using adsorbent bed of active carbon |
| CN202876608U (en) * | 2012-10-25 | 2013-04-17 | 宁波中瑞环保科技有限公司 | Organic waste gas adsorption and vacuum desorption recycling device |
| CN105126536A (en) * | 2015-08-10 | 2015-12-09 | 新奥气化采煤有限公司 | Natural gas purification device, purification system, treatment system and adsorbent regeneration method |
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| 刘家祺 等: "《分离过程与技术》", 31 December 2001, 天津大学出版社 * |
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