CN113117450A - Landfill gas desulfurization treatment device - Google Patents
Landfill gas desulfurization treatment device Download PDFInfo
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- CN113117450A CN113117450A CN201911425409.7A CN201911425409A CN113117450A CN 113117450 A CN113117450 A CN 113117450A CN 201911425409 A CN201911425409 A CN 201911425409A CN 113117450 A CN113117450 A CN 113117450A
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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
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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
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40086—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by using a purge gas
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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Abstract
The invention provides a desulfurization treatment device for landfill gas; the adsorption tower comprises an adsorption tower, a heater, an air inlet pipe fitting, an air outlet pipe fitting, a pressure gauge, a temperature gauge and a valve, wherein the pressure gauge, the temperature gauge and the valve are connected with the air inlet pipe fitting, the air outlet pipe fitting and the adsorption tower; the invention improves the service life of the desulfurizer, reduces the use cost of the desulfurizer and the maintenance cost of equipment, and improves the use efficiency of the equipment.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the field of landfill gas treatment, in particular to a landfill gas desulfurization treatment device.
[ background of the invention ]
The landfill gas is a mixed gas which is generated by decomposing domestic garbage by microorganisms in a landfill site after the domestic garbage is filled, wherein the mixed gas takes methane and carbon dioxide as main components, contains a small amount of substances such as ammonia, carbon monoxide, hydrogen sulfide, various volatile organic compounds and the like, and can generate odor and air pollution; the landfill gas also contains trace ammonia, carbon monoxide, hydrogen sulfide, various volatile organic compounds and other substances, so that the problems of odor and air pollution can be caused; the existing desulfurizer commonly used in the landfill gas desulfurization device is an iron oxide desulfurizer or the desulfurizer is matched with an active carbon adsorbent for use, and the service life of the desulfurizer used as the iron oxide desulfurizer in the chemical industry is about 1 to 2 years; therefore, the desulfurizer needs to be replaced every year in the landfill gas desulfurization, the specification of desulfurization equipment in a landfill site is large, 600 tons of adsorbents need to be filled in each tower basically, and if a multi-tower combined tower desulfurization device is adopted, 1800 tons of adsorbents need to be replaced every year or two years, so that the use cost of the desulfurizer and the maintenance cost of the equipment are increased; the filling of the desulfurizer wastes time, so that the working efficiency of the equipment is greatly reduced; in addition, in order to improve the working efficiency of the equipment, more adsorption towers are adopted to combine the desulfurization equipment, more cost is increased, and more occupied area needs to be wasted.
[ summary of the invention ]
In order to solve the technical problem, the invention provides a desulfurization treatment device for landfill gas; the adsorption tower comprises an adsorption tower, a heater, an air inlet pipe fitting, an air outlet pipe fitting, a pressure gauge, a temperature gauge and a valve, wherein the pressure gauge, the temperature gauge and the valve are connected with the air inlet pipe fitting, the air outlet pipe fitting and the adsorption tower; the method is characterized in that the adsorption tower is divided into an adsorption tower A, an adsorption tower B and an adsorption tower C, the adsorption tower A, the adsorption tower B and the adsorption tower C alternately perform adsorption and desorption, and desulfurization adsorbents with adsorption capacity of more than or equal to 60 are filled in the adsorption tower A, the adsorption tower B and the adsorption tower C.
Preferably, the air inlet pipe fitting is divided into a raw material air inlet pipe, an air inlet pipe, a nitrogen inlet pipe and a purified gas inlet pipe; the pipe fitting of giving vent to anger divide into and purifies the gas outlet duct and desorb the gas outlet duct, raw materials intake pipe, purification gas outlet duct and desorb the gas outlet duct and be connected with adsorption tower A, adsorption tower B, adsorption tower C, the heater is connected on with purifying the gas outlet duct.
Preferably, the nitrogen inlet pipe is communicated with the purified gas outlet pipe, the adsorption tower A, the adsorption tower B, the adsorption tower C, the heater and the desorbed gas outlet pipe through the raw material inlet pipe and the purified gas inlet pipe.
Preferably, the adsorption tower A, the adsorption tower B and the adsorption tower C are provided with temperature transmitters, and the purified gas outlet pipe is provided with a pressure transmitter.
Preferably, the product gas inlet pipe is connected with the purified gas outlet pipe; and a regulating valve and a stop valve are arranged between the product gas inlet pipe and the purified gas outlet pipe.
Preferably, the raw material inlet pipe, the air inlet pipe, the nitrogen inlet pipe, the purified gas outlet pipe and the desorbed gas outlet pipe are provided with program control valves.
Preferably, the purified gas outlet pipe is provided with a temperature display meter and a pressure display meter.
A desulfurization method of landfill gas is characterized by comprising the following steps: the method comprises the following steps:
the first step is as follows: opening a program control valve and a stop valve on a nitrogen inlet pipe, introducing nitrogen into the adsorption tower A, the adsorption tower B, the adsorption tower C, the heater, a purified gas outlet pipe, a desorbed gas outlet pipe and a valve from a raw material inlet pipe and a purified gas inlet pipe, and purging to take away impurities;
secondly, closing the program control valve and the stop valve on the nitrogen gas inlet pipe, opening the program control valve on the raw material gas inlet pipe, enabling the raw material gas subjected to free water removal to enter an adsorption tower A in an adsorption state from the bottom, adsorbing the sulfur-containing components on an adsorption bed consisting of an adsorbent in the adsorption process, and discharging the unadsorbed gas out of the product gas outlet pipe;
thirdly, when the adsorption of the adsorption tower A is saturated, desorption is started, and the adsorption tower B adsorbs the substances while the adsorption tower A desorbs the substances; and after the adsorption of the adsorption tower B is saturated, desorption is started, and the adsorption tower A, the adsorption tower B and the adsorption tower C alternately perform adsorption and desorption, so that uninterrupted adsorption and desorption are achieved, and the working efficiency is improved.
A landfill gas desulfurization treatment method, wherein the desorption step comprises the following steps:
step one, after adsorption saturation of an adsorption tower A, program control valves on a raw material inlet pipe and a finished product gas outlet pipe which are connected with the adsorption tower A are closed, program control valves on a raw material inlet pipe and a finished product gas outlet pipe which are connected with an adsorption tower B are opened, and raw material gas enters the adsorption tower B to start adsorption desulfurization;
secondly, heating the adsorption tower; the method comprises the following steps that a regulating valve and a stop valve which are installed between a product gas inlet pipe and a purified gas outlet pipe are opened, program-controlled valves on the product gas inlet pipe and a desorption gas outlet pipe which are connected with an adsorption tower A are opened, the product gas enters a heater through the product gas inlet pipe after being subjected to pressure regulation by the regulating valve and is heated to 160-300 ℃, the heated product gas enters the product gas inlet pipe through the top of the adsorption tower A and is heated and swept to an adsorbent inside, sulfur adsorbed by the adsorbent is desorbed in a high-temperature state, and the desorption gas is discharged through the desorption gas outlet pipe and is discharged and emptied after desulfurization treatment;
thirdly, cooling the adsorption tower; firstly, the heater is turned off, the product gas continuously enters from the top of the adsorption tower A to cool and blow the adsorbent inside, and the adsorbent is slowly cooled, so that the desorption of the adsorption tower A is finished after the temperature in the adsorption tower A is reduced to the normal temperature; thus, the adsorption tower A completes the complete cycle process and waits for the next adsorption cycle; thereby completing the desorption step of the adsorption column B and the adsorption column C.
The invention improves the service life of the desulfurizer, reduces the use cost of the desulfurizer and the maintenance cost of equipment, and improves the use efficiency of the equipment.
[ description of the drawings ]
FIG. 1 is a schematic diagram of the present invention.
Detailed Description
Referring to fig. 1, the invention provides a desulfurization treatment device for landfill gas; the device comprises an adsorption tower, a heater 1, an air inlet pipe fitting, an air outlet pipe fitting, a pressure gauge, a thermometer and a valve, wherein the pressure gauge, the thermometer and the valve are connected with the air inlet pipe fitting and the air outlet pipe fitting, and the valve is divided into an adjusting valve 4, a program control valve 5 and a stop valve 6; the method is characterized in that the adsorption tower is divided into an adsorption tower A1, an adsorption tower B2 and an adsorption tower C3, the adsorption tower A2, the adsorption tower B3 and the adsorption tower C4 alternately carry out adsorption and desorption, and the adsorption tower A2, the adsorption tower B3 and the adsorption tower C4 are filled with desulfurization adsorbents with adsorption capacity of more than or equal to 60; the air inlet pipe fitting is divided into a raw material air inlet pipe 7, an air inlet pipe 8, a nitrogen inlet pipe 9 and a purified gas inlet pipe 10; the gas outlet pipe fitting is divided into a purified gas outlet pipe 11 and a desorbed gas outlet pipe 12, the raw material gas inlet pipe 7, the purified gas outlet pipe 11 and the desorbed gas outlet pipe 12 are connected with an adsorption tower A2, an adsorption tower B3 and an adsorption tower C4, and the heater 1 is connected with the purified gas outlet pipe 11; the nitrogen gas inlet pipe 9 is communicated with a purified gas outlet pipe 11, an adsorption tower A2, an adsorption tower B3, an adsorption tower C4, a heater 1 and a desorbed gas outlet pipe 12 through a raw material inlet pipe 7 and a purified gas inlet pipe 10; temperature transmitters 13 are arranged on the adsorption tower A2, the adsorption tower B3 and the adsorption tower C4, and a pressure transmitter 14 is arranged on the purified gas outlet pipe 11; the purified gas inlet pipe 10 is connected with the purified gas outlet pipe 11; an adjusting valve 4 and a stop valve 6 are arranged between the purified gas inlet pipe 10 and the purified gas outlet pipe 11; the raw material inlet pipe 7, the air inlet pipe 8, the nitrogen inlet pipe 9, the purified gas inlet pipe 10, the purified gas outlet pipe 11 and the desorption gas outlet pipe 12 are provided with a program control valve 5; and a temperature display meter 15 and a pressure display meter 16 are arranged on the purified gas outlet pipe 11.
A desulfurization method of landfill gas is characterized by comprising the following steps: the method comprises the following steps:
the first step is as follows: opening a program control valve and a stop valve on a nitrogen inlet pipe, introducing nitrogen into the adsorption tower A, the adsorption tower B, the adsorption tower C, the heater, a purified gas outlet pipe, a desorbed gas outlet pipe and a valve from a raw material inlet pipe and a purified gas inlet pipe, and purging to take away impurities;
secondly, closing the program control valve and the stop valve on the nitrogen gas inlet pipe, opening the program control valve on the raw material gas inlet pipe, enabling the raw material gas subjected to free water removal to enter an adsorption tower A in an adsorption state from the bottom, adsorbing the sulfur-containing components on an adsorption bed consisting of an adsorbent in the adsorption process, and discharging the unadsorbed gas out of the product gas outlet pipe;
thirdly, when the adsorption of the adsorption tower A is saturated, desorption is started, and the adsorption tower B adsorbs the substances while the adsorption tower A desorbs the substances; and after the adsorption of the adsorption tower B is saturated, desorption is started, and the adsorption tower A, the adsorption tower B and the adsorption tower C alternately perform adsorption and desorption, so that uninterrupted adsorption and desorption are achieved, and the working efficiency is improved.
A landfill gas desulfurization treatment method, wherein the desorption step comprises the following steps:
step one, after adsorption saturation of an adsorption tower A, program control valves on a raw material inlet pipe and a finished product gas outlet pipe which are connected with the adsorption tower A are closed, program control valves on a raw material inlet pipe and a finished product gas outlet pipe which are connected with an adsorption tower B are opened, and raw material gas enters the adsorption tower B to start adsorption desulfurization;
secondly, heating the adsorption tower A; the method comprises the following steps that a regulating valve and a stop valve which are installed between a product gas inlet pipe and a purified gas outlet pipe are opened, program-controlled valves on the product gas inlet pipe and a desorption gas outlet pipe which are connected with an adsorption tower A are opened, the product gas enters a heater through the product gas inlet pipe after being subjected to pressure regulation by the regulating valve and is heated to 160-300 ℃, the heated product gas enters the product gas inlet pipe through the top of the adsorption tower A and is heated and swept to an adsorbent inside, sulfur adsorbed by the adsorbent is desorbed in a high-temperature state, and the desorption gas is discharged through the desorption gas outlet pipe and is discharged and emptied after desulfurization treatment;
thirdly, cooling the adsorption tower; firstly, the heater is turned off, the product gas continuously enters from the top of the adsorption tower A to cool and blow the adsorbent inside, and the adsorbent is slowly cooled, so that the desorption of the adsorption tower A is finished after the temperature in the adsorption tower A is reduced to the normal temperature; thus, the adsorption tower A completes the complete cycle process and waits for the next adsorption cycle; the desorption step of the adsorption column B and the adsorption column C is completed in this cycle.
According to the invention, by combining the adsorbent with the adsorption capacity of more than or equal to 60 and the temperature swing adsorption process, the desulfurization adsorbent in the adsorption tower can be repeatedly regenerated and adsorbed, so that the purpose that the desulfurization adsorbent is not required to be replaced once every year or two years is achieved, and the use cost of the adsorbent and the maintenance cost of equipment are saved; compared with the use of an iron oxide desulfurizer in the adsorption towers with the same specification, the service life of the adsorbent is prolonged by 4 times, the dosage of the desulfurization adsorbent in each tower can be reduced by 3 times every year, and the adsorbent is filled into the adsorption towers and is filled in a unit of ton; under the condition of prolonging the service life by 4 times, the use amount of the iron oxide desulfurizer can be reduced; compared with the use of an iron oxide desulfurizer, the cost of the adsorbent and the maintenance cost of the equipment are greatly reduced, and in addition, the adsorbent does not need to be replaced every 1 to 2 years, so that the time cost for replacing the adsorbent is saved, the working efficiency of the equipment is not delayed, and the desulfurization working efficiency of the equipment can be improved; in addition, the invention does not need to increase the floor area of the equipment to increase more adsorption towers for matching work in order to improve the working efficiency of the equipment, and the cost of the adsorbent can be increased by increasing the floor area of the equipment to increase more adsorption towers; therefore, the invention also solves the problems of large floor area and low working efficiency of the existing large-scale equipment.
The above embodiments are illustrative of the present invention, and are not intended to limit the present invention, and any simple modifications of the present invention are within the scope of the present invention.
Claims (9)
1. A desulfurization treatment device for landfill gas; the adsorption tower comprises an adsorption tower, a heater, an air inlet pipe fitting, an air outlet pipe fitting, a pressure gauge, a temperature gauge and a valve, wherein the pressure gauge, the temperature gauge and the valve are connected with the air inlet pipe fitting, the air outlet pipe fitting and the adsorption tower; the method is characterized in that the adsorption tower is divided into an adsorption tower A, an adsorption tower B and an adsorption tower C, the adsorption tower A, the adsorption tower B and the adsorption tower C alternately perform adsorption and desorption, and desulfurization adsorbents with adsorption capacity of more than or equal to 60 are filled in the adsorption tower A, the adsorption tower B and the adsorption tower C.
2. A landfill gas desulfurization treatment device as set forth in claim 1; the method is characterized in that: the air inlet pipe fitting is divided into a raw material air inlet pipe, an air inlet pipe, a nitrogen inlet pipe and a purified gas inlet pipe; the pipe fitting of giving vent to anger divide into and purifies the gas outlet duct and desorb the gas outlet duct, raw materials intake pipe, purification gas outlet duct and desorb the gas outlet duct and be connected with adsorption tower A, adsorption tower B, adsorption tower C, the heater is connected with purifying the gas outlet duct.
3. A landfill gas desulfurization treatment device as set forth in claim 2; the method is characterized in that: the nitrogen gas intake pipe pass through raw materials intake pipe and purification gas intake pipe and purify gas outlet duct, adsorption tower A, adsorption tower B, adsorption tower C, heater, desorption gas outlet duct intercommunication.
4. A landfill gas desulfurization treatment apparatus according to claim 2 or 3, wherein: adsorption tower A, adsorption tower B, adsorption tower C on install temperature transmitter, install pressure transmitter on the purified gas outlet duct.
5. The landfill gas desulfurization treatment device of claim 3, wherein: the purified gas inlet pipe is connected with the purified gas outlet pipe; and an adjusting valve and a stop valve are arranged between the purified gas inlet pipe and the purified gas outlet pipe.
6. The landfill gas desulfurization treatment device according to any one of claims 2 to 5, wherein: the raw material intake pipe, the air intake pipe, the nitrogen intake pipe, the purified gas outlet pipe and the desorption gas outlet pipe are provided with a program control valve.
7. The landfill gas desulfurization treatment device according to any one of claims 2 to 6, wherein: and a temperature display meter and a pressure display meter are arranged on the purified gas outlet pipe.
8. A desulfurization method of landfill gas is characterized by comprising the following steps: the method comprises the following steps:
the first step is as follows: opening a program control valve and a stop valve on a nitrogen inlet pipe, introducing nitrogen into the adsorption tower A, the adsorption tower B, the adsorption tower C, the heater, a purified gas outlet pipe, a desorbed gas outlet pipe and a valve from a raw material inlet pipe and a purified gas inlet pipe, and purging to take away impurities;
secondly, closing the program control valve and the stop valve on the nitrogen gas inlet pipe, opening the program control valve on the raw material gas inlet pipe, enabling the raw material gas subjected to free water removal to enter an adsorption tower A in an adsorption state from the bottom, adsorbing the sulfur-containing components on an adsorption bed consisting of an adsorbent in the adsorption process, and discharging the unadsorbed gas out of the product gas outlet pipe;
thirdly, when the adsorption of the adsorption tower A is saturated, desorption is started, and the adsorption tower B adsorbs the substances while the adsorption tower A desorbs the substances; and after the adsorption of the adsorption tower B is saturated, desorption is started, and the adsorption tower A, the adsorption tower B and the adsorption tower C alternately perform adsorption and desorption, so that uninterrupted adsorption and desorption are achieved, and the working efficiency is improved.
9. The landfill gas desulfurization treatment method of claim 8, wherein: the step of desorbing comprises:
step one, after adsorption saturation of an adsorption tower A, program control valves on a raw material inlet pipe and a finished product gas outlet pipe which are connected with the adsorption tower A are closed, program control valves on a raw material inlet pipe and a finished product gas outlet pipe which are connected with an adsorption tower B are opened, and raw material gas enters the adsorption tower B to start adsorption desulfurization;
secondly, heating the adsorption tower A; the method comprises the following steps that a regulating valve and a stop valve which are installed between a product gas inlet pipe and a purified gas outlet pipe are opened, program-controlled valves on the product gas inlet pipe and a desorption gas outlet pipe which are connected with an adsorption tower A are opened, the product gas enters a heater through the product gas inlet pipe after being subjected to pressure regulation by the regulating valve and is heated to 160-300 ℃, the heated product gas enters the product gas inlet pipe through the top of the adsorption tower A and is heated and swept to an adsorbent inside, sulfur adsorbed by the adsorbent is desorbed in a high-temperature state, and the desorption gas is discharged through the desorption gas outlet pipe and is discharged and emptied after desulfurization treatment;
thirdly, cooling the adsorption tower; firstly, the heater is turned off, the product gas continuously enters from the top of the adsorption tower A to cool and blow the adsorbent inside, and the adsorbent is slowly cooled, so that the desorption of the adsorption tower A is finished after the temperature in the adsorption tower A is reduced to the normal temperature; thus, the adsorption tower A completes the complete cycle process and waits for the next adsorption cycle; thereby completing the desorption step of the adsorption column B and the adsorption column C.
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| CN201911425409.7A CN113117450A (en) | 2019-12-31 | 2019-12-31 | Landfill gas desulfurization treatment device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114854464A (en) * | 2022-04-07 | 2022-08-05 | 宁夏首朗吉元新能源科技有限公司 | Biogas purification and recovery device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114854464A (en) * | 2022-04-07 | 2022-08-05 | 宁夏首朗吉元新能源科技有限公司 | Biogas purification and recovery device and method |
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