WO2020062401A1 - 一种污泥恶臭气体的处理系统 - Google Patents

一种污泥恶臭气体的处理系统 Download PDF

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WO2020062401A1
WO2020062401A1 PCT/CN2018/112986 CN2018112986W WO2020062401A1 WO 2020062401 A1 WO2020062401 A1 WO 2020062401A1 CN 2018112986 W CN2018112986 W CN 2018112986W WO 2020062401 A1 WO2020062401 A1 WO 2020062401A1
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tower
pressure swing
adsorption tower
swing adsorption
valve
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PCT/CN2018/112986
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English (en)
French (fr)
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黄都都
武云
徐四海
崔雷
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安徽节源环保科技有限公司
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Priority to US16/307,134 priority Critical patent/US11285429B2/en
Publication of WO2020062401A1 publication Critical patent/WO2020062401A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01D53/14—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 absorption
    • B01D53/1431—Pretreatment by other processes
    • B01D53/1437—Pretreatment by adsorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
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    • 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
    • B01D53/047—Pressure swing adsorption
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    • 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
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    • 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
    • B01D53/0446—Means for feeding or distributing gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
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    • 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
    • B01D53/047—Pressure swing adsorption
    • B01D53/053—Pressure swing adsorption with storage or buffer vessel
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B01D53/14—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 absorption
    • B01D53/1456—Removing acid components
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    • B01D53/18—Absorbing units; Liquid distributors therefor
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    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01D53/46—Removing components of defined structure
    • B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
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    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01D2259/402—Further details for adsorption processes and devices using two beds
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    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01D53/8687—Organic components

Definitions

  • the present application relates to the technical field of sludge gas treatment, and in particular, to a sludge odor gas treatment system.
  • large-scale urban sewage treatment plants generally use the activated sludge process to perform sewage treatment.
  • the sludge in each pool is collected after anaerobic degradation, filtration, and composting, and finally returned to the field or incinerated.
  • the source of malodorous gas is generally hydrogen sulfide, volatile thiol, volatile thioether, ammonia, and volatile organic amine.
  • the environmental sanitation of the factory area and surrounding areas has adversely affected, and even when the local concentration is too large, it poses a serious safety hazard to the site operators. In order to avoid such incidents, it is necessary to deodorize and harmless the malodorous gas of sludge.
  • this application proposes a sludge odor gas treatment system.
  • a sludge odor gas treatment system proposed in this application includes: an air compressor, a first pressure swing adsorption tower, a second pressure swing adsorption tower, a buffer tank, a decomposition tank, an exhaust gas washing tower, and a vacuum device;
  • the inlet of the air compressor is used to access the malodorous gas to be treated, and its outlet is connected to the inlet of the first pressure swing adsorption tower through a first valve, and is connected to the outlet of the second pressure swing adsorption tower through a second valve;
  • the outlet of the first pressure swing adsorption tower is connected to the inlet of the decomposition tank through a third valve, and the inlet of the buffer tank is connected through a fifth valve; the outlet of the second pressure swing adsorption tower is connected to the inlet of the decomposition tank through a fourth valve, and through the first valve.
  • Six valves communicate with the inlet of the buffer tank;
  • the outlet of the buffer tank is used to output the processed gas;
  • the outlet of the decomposition tank is connected to the inlet of the exhaust gas washing tower, the outlet of the exhaust gas washing tower is connected to the inlet of the vacuum device, and the vacuum device is used to exhaust the exhaust gas.
  • the tail gas washing tower is further provided with a circulation inlet and a circulation outlet, and the circulation inlet and the circulation outlet are communicated through a circulation pump.
  • one of the first PSA tower and the second PSA tower in the working state, one of the first PSA tower and the second PSA tower is in an adsorption state and the other is in a desorption state; the first PSA tower or the second PSA tower in the adsorption state
  • the pressure swing adsorption tower is used as the adsorption tower, and the first pressure swing adsorption tower or the second pressure swing adsorption tower in the desorbed state is used as the desorption tower;
  • the air compressor, the adsorption tower and the buffer tank are connected in sequence to form the first flow path, and the desorption tower, the decomposition tank, the exhaust gas washing tower and the vacuum device are connected in order to form the second flow path; the first valve, the second valve, the third valve, the first valve Among the four valves, the fifth valve and the sixth valve, the valves connected in series on the first flow path are all in a conducting state, and the valves between the desorption tower and the decomposition tank are also in a conducting state, which are located in the air compressor and the desorption tower.
  • the valves in between, the valves between the desorption tower and the buffer tank, and the valves between the adsorption tower and the decomposition tank are all in a cut-off state.
  • an air compressor is used to compress the malodorous gas to be treated to 0.2-2.0 MPa and input it to the adsorption tower.
  • the desorption tower is in a negative pressure state after the vacuum device is finished working.
  • the adsorption material filled in the first pressure swing adsorption tower and the second pressure swing adsorption tower is one or more of zeolite molecular sieve, activated carbon, activated alumina, and silica gel.
  • a sludge separation tank and an aerobic aeration tank are sequentially connected to the outlet of the buffer tank.
  • the decomposition tank is deodorized by catalytic combustion or photocatalytic decomposition.
  • the washing solvent used in the tail gas washing tower is one or more of sodium bicarbonate aqueous solution, sodium carbonate aqueous solution, and sodium hydroxide aqueous solution.
  • a first pressure swing adsorption tower and a second pressure swing adsorption tower cooperate to form a symmetry mechanism, and the first pressure swing adsorption tower and the second pressure swing adsorption tower are in Switch between the adsorption tower and the desorption tower.
  • it can ensure that the adsorption treatment of the malodorous gas by the adsorption tower is performed in real time to avoid processing neutrality; on the other hand, when the adsorption tower is saturated, it can be switched to the desorption tower.
  • the use of air compressors instead of blowers and compressors can reduce the cost of compression energy consumption to neglect; the adsorbents used in the first pressure swing adsorption tower and the second pressure swing adsorption tower
  • the catalyst used in the decomposition tank can be recycled after being desorbed, and the replacement frequency is low, thereby reducing the replacement cost of raw materials.
  • the volume of the enriched malodorous gas is significantly reduced through the adsorption and decompression methods of the pressure swing adsorption tower, which improves the subsequent processing efficiency and reduces the equipment volume.
  • the adsorbent designed in the present application has a large adsorption capacity for various malodorous gases under pressurized conditions, and the process of catalytically decomposing malodorous gases is widely used, mature and reliable. Finally, each of them is decomposed and oxidized by an alkaline absorption solution. The components are absorbed so that the malodorous gas is completely processed.
  • the adsorbent after the adsorbent reaches its useful life, it can be sent directly to the incinerator of the hazardous waste treatment plant, and the hazardous waste plant is very welcome to such high calorific value and low hazard activated carbon; when the absorbent is neutralized to neutral, It is directly discharged to the wastewater pretreatment device, and is not discharged; while the exhaust gas is qualified treatment gas, it is directly emptied.
  • FIG. 1 is a schematic structural diagram of a sludge odor gas treatment system proposed in the present application.
  • a sludge foul gas treatment system proposed in the present application includes an air compressor 1, a first pressure swing adsorption tower 2, a second pressure swing adsorption tower 3, a buffer tank 4, a decomposition tank 5, and an exhaust gas. Washing tower 6 and vacuum device 7.
  • the inlet of the air compressor 1 is used to access the malodorous gas to be treated, and its outlet is connected to the inlet of the first pressure swing adsorption tower 2 through the first valve K1, and is connected to the outlet of the second pressure swing adsorption tower 3 through the second valve K2.
  • the adsorption material filled in the first pressure swing adsorption tower 2 and the second pressure swing adsorption tower 3 is one or more of zeolite molecular sieve, activated carbon, activated alumina, and silica gel.
  • the foul gas is adsorbed.
  • the air compressor 1 is used to compress the malodorous gas to be treated to 0.2-2.0 MPa and input the first pressure swing adsorption tower 2 or the second pressure swing adsorption tower 3 to improve the first pressure swing adsorption tower 2 and the second pressure swing adsorption.
  • the tower 3 has an adsorption treatment effect for the malodorous gas to be treated.
  • the outlet of the first pressure swing adsorption tower 2 is connected to the inlet of the decomposition tank 5 through the third valve K3, and is connected to the inlet of the buffer tank 4 through the fifth valve K5.
  • the outlet of the second pressure swing adsorption tower 3 is connected to the inlet of the decomposition tank 5 through the fourth valve K4, and is connected to the inlet of the buffer tank 4 through the sixth valve K6.
  • the decomposition tank performs deodorization treatment by catalytic combustion or photocatalytic decomposition.
  • the outlet of the buffer tank 4 is used to output the processed gas.
  • the outlet of the buffer tank 4 is connected to a sludge separation tank and an aerobic aeration tank in order.
  • the buffer tank 4 inputs the gas after the adsorption treatment in the first pressure swing adsorption tower 2 or the second pressure swing adsorption tower 3 into the sludge separation tank and the aerobic aeration tank for further processing, so as to ensure that the exhaust gas discharged finally is pollution-free.
  • the outlet of the decomposition tank 5 communicates with the inlet of the exhaust gas washing tower 6, and the outlet of the exhaust gas washing tower 6 communicates with the inlet of the vacuum device 7, which is used to exhaust the exhaust gas.
  • one of the first pressure swing adsorption tower 2 and the second pressure swing adsorption tower 3 in the working state of the processing system, one of the first pressure swing adsorption tower 2 and the second pressure swing adsorption tower 3 is in an adsorption state and the other is in a desorption state.
  • the first pressure swing adsorption tower 2 or the second pressure swing adsorption tower 3 in the adsorption state is used as the adsorption tower
  • the first pressure swing adsorption tower 2 or the second pressure swing adsorption tower 3 in the desorption state is used as the desorption tower.
  • the air compressor 1, the adsorption tower and the buffer tank 4 are connected in order to form a first flow path, and the desorption tower, the decomposition tank 5, the exhaust gas washing tower 6 and the vacuum device 7 are connected in order to form a second flow path.
  • the valves connected in series to the first flow channel are all in a conducting state to ensure the first flow channel. It is unblocked, and the valve between the desorption tower and the decomposition tank 5 is also in a conducting state to ensure the unblocking of the second flow path.
  • valve between the air compressor 1 and the desorption tower, the desorption tower and the buffer tank 4 The valves in between, the valves between the adsorption tower and the decomposition tank 5 are all in a cut-off state to avoid crosstalk between the flow channel where the adsorption tower is located and the flow channel where the desorption tower is located.
  • the malodorous gas to be processed is compressed by the air compressor 1 and then enters an adsorption tower for adsorption treatment, and then enters a subsequent processing process through a buffer tank so as to be discharged without pollution.
  • the pollutants adsorbed in the adsorption tower increase If the internal pressure of the adsorption tower increases to a certain degree, the adsorption tower is switched to a desorption tower, and the desorption tower is disconnected from the air compressor 1 through a valve. Under the action of the vacuum device 7, a negative pressure is formed at the exit end of the desorption tower.
  • the desorption tower is in a negative pressure state to ensure the gas adsorption effect when the desorption tower is switched to the adsorption tower again.
  • the exhaust gas washing tower 6 is further provided with a circulation inlet and a circulation outlet, and the circulation inlet and the circulation outlet are communicated through a circulation pump 8. In this way, the circulation gas can be circulated and washed through the circulation pump 8 to ensure that the exhaust gas is discharged without pollution.
  • the washing solvent used in the tail gas washing tower is one or more of sodium bicarbonate aqueous solution, sodium carbonate aqueous solution, and sodium hydroxide aqueous solution.
  • the first pressure swing adsorption tower 2 is used as an adsorption tower
  • the second pressure swing adsorption tower 3 is used as a desorption tower.
  • the collected malodorous gas is compressed to 1.0 MPa (A) by the air compressor, and the second valve K2, the third valve K3, and the sixth valve K6 are closed at the same time, and the first valve K1 and the fourth valve are opened.
  • K4 and the fifth valve K5 the malodorous gas compressed by the air compressor 1 enters the first pressure swing adsorption tower filled with granular activated carbon, and the fully desorbed gas then enters the buffer tank. According to the actual production needs, the deodorized gas is discharged into Sludge separation tank and aerobic aeration tank.
  • the vacuum device 7 Turn on the vacuum device 7 and adjust the internal pressure of the second pressure swing adsorption tower 3 to 0.06 MPa (A). After 2 hours of full desorption, close the vacuum device 7 so that the second pressure swing adsorption tower 3 remains ready for use and is convenient. Switch between desorption tower and adsorption tower.
  • the enriched malodorous gas is decomposed and oxidized by 254 nm ultraviolet light in the decomposition tank 5 under the TiO 2 catalyst, and the resulting acid gas is washed by a 10% sodium hydroxide aqueous solution in the tail gas. It is removed from the tower and the clean gas is evacuated through a vacuum device.
  • the collected malodorous gas is compressed to 1.2 MPa (A) by the air compressor, and the first valve K1, the fourth valve K4, and the fifth valve K5 are closed at the same time, and the second valve K2 and the third valve are opened.
  • Valve K3 and sixth valve K6 the gas compressed by the air compressor 1 enters the second pressure swing adsorption tower filled with granular activated carbon, and the fully desorbed gas then enters the buffer tank. According to the actual production needs, the deodorized gas is discharged into the sewage Sludge separation tank and aerobic aeration tank.
  • the first pressure swing adsorption tower is in a desorption state.
  • the pressure inside the first pressure swing adsorption tower is 1 atm (A)
  • the desorption starts, and the vacuum device is turned on to maintain the pressure in the first pressure swing adsorption tower at 0.05 MPa (A).
  • the vacuum device was closed, and the first pressure swing adsorption tower remained on standby.
  • the enriched malodorous gas was decomposed and oxidized by 365 nm ultraviolet rays in a decomposition tank under a TiO 2 catalyst.
  • the acid gas thus generated is removed by a 15% sodium hydroxide aqueous solution in an exhaust gas washing tower, and the clean gas is evacuated through a vacuum system.

Abstract

一种污泥恶臭气体的处理系统，包括：空压机（1）、第一变压吸附塔（2）、第二变压吸附塔（3）、缓冲罐（4）、分解罐（5）、尾气洗涤塔（6）和真空装置（7），其工艺步骤包括利用空压机（1）将恶臭气体进行压缩，再利用变压吸附剂进行吸附，脱除恶臭组分的空气用于处理池中的污泥分离和好氧曝气，当变压吸附剂到达设计上限值时，停止进气，减压脱附，恶臭组分经富集后送往催化燃烧或光催化分解，然后用碱性吸收剂将尾气中酸性气体做中和处理，最终达标排放，处理成本低，降低恶臭处理体积，恶臭气体处理完全且三废易处理。

Description

一种污泥恶臭气体的处理系统
本申请要求于2018年09月28日提交中国专利局、申请号为201811139765.8、申请名称为一种污泥恶臭气体的处理系统的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及污泥气体处理技术领域，尤其涉及一种污泥恶臭气体的处理系统。
背景技术
目前大型的城市污水处理厂一般都采用活性污泥法工艺进行污水处理，各池污泥收集后经厌氧降解、过滤、堆肥，最后返田或焚烧；污泥厌氧降解、过滤、堆肥过程都会产生恶臭性气体，该气体的恶臭来源一般以硫化氢、挥发性硫醇、挥发性硫醚、氨、挥发性有机胺为主，通常为无组织排放，由于比重大，不易扩散稀释，会给厂区和周边地区的环境卫生造成不利影响，甚至在局部浓度过大时，对现场操作人员带来严重的安全隐患。为避免出现此类事件，对污泥恶臭气体进行除臭和无害化处理是十分必要的。
发明内容
基于背景技术存在的技术问题，本申请提出了一种污泥恶臭气体的处 理系统。
本申请提出的一种污泥恶臭气体的处理系统，包括：空压机、第一变压吸附塔、第二变压吸附塔、缓冲罐、分解罐、尾气洗涤塔和真空装置；
空压机的入口用于接入待处理恶臭气体，其出口通过第一阀门连通第一变压吸附塔的入口，并通过第二阀门连通第二变压吸附塔的出口；
第一变压吸附塔的出口通过第三阀门连通分解罐的入口，并通过第五阀门连通缓冲罐的入口；第二变压吸附塔的出口通过第四阀门连通分解罐的入口，并通过第六阀门连通缓冲罐的入口；
缓冲罐的出口用于输出处理后的气体；分解罐的出口连通尾气洗涤塔的入口，尾气洗涤塔的出口与真空装置的入口连通，真空装置用于排出尾气。
在优选实施例中，尾气洗涤塔上还设有循环入口和循环出口，循环入口和循环出口通过循环泵连通。
在优选实施例中，工作状态下，第一变压吸附塔和第二变压吸附塔中，一个处于吸附状态，另一个处于脱附状态；吸附状态下的第一变压吸附塔或者第二变压吸附塔作为吸附塔，脱附状态下的第一变压吸附塔或者第二变压吸附塔作为脱附塔；
空压机、吸附塔和缓冲罐依次连接构成第一流道，脱附塔、分解罐、尾气洗涤塔和真空装置依次连接构成第二流道；第一阀门、第二阀门、第三阀门、第四阀门、第五阀门和第六阀门中，串联在第一流道上的阀门均处于导通状态，且脱附塔和分解罐之间的阀门也处于导通状态，位于空压机与脱附塔之间的阀门、脱附塔与缓冲罐之间的阀门、吸附塔与分解罐之 间的阀门均处于截止状态。
在优选实施例中，空压机用于将待处理恶臭气体压缩到0.2-2.0MPa后输入吸附塔。
在优选实施例中，真空装置工作结束后，脱附塔处于负压状态。
在优选实施例中，第一变压吸附塔和第二变压吸附塔内填充的吸附材料为沸石分子筛、活性炭、活性氧化铝、硅胶中的一种或几种。
在优选实施例中，缓冲罐出口依次连通有污泥分离池和好氧曝气池。
在优选实施例中，分解罐采用催化燃烧或光催化分解的方式进行去臭处理。
在优选实施例中，尾气洗涤塔所用洗涤溶剂为碳酸氢钠水溶液、碳酸钠水溶液、氢氧化钠水溶液中的一种或几种。
本申请提出的一种污泥恶臭气体的处理系统中，第一变压吸附塔和第二变压吸附塔配合构成对称机构的处理系统，第一变压吸附塔和第二变压吸附塔在吸附塔和脱附塔之间切换，一来，可保证吸附塔对恶臭气体的吸附处理实时进行，避免出现处理空挡；二来，可在吸附塔出现饱和时，将其切换为脱附塔进行脱附处理，从而保证吸附塔工作的可靠性。
相对于现有的污染气体处理工艺，本申请中，利用空压机代替鼓风机和压缩机，压缩耗能成本可降低至忽略不计；第一变压吸附塔和第二变压吸附塔所用吸附剂和分解罐所用催化剂，经脱附处理，可循环使用，更换频率低，从而降低原料更换成本。
本申请中，通过变压吸附塔吸附和解压方式，富集的恶臭气体体积明显变小，提高后续的处理效率，并减少设备体积。本申请所设计的吸附剂 在加压条件下，对各种恶臭气体都具有较大的吸附容量，而催化分解恶臭气体的工艺应用广泛，成熟可靠，最后经碱性吸收液将各分解、氧化的组分吸收下来，使得恶臭气体处理完全。
本申请中，吸附剂达到使用寿命后，可直接送往危废处理厂焚烧炉，且危废厂对此类高热值、低危害的活性炭是十分欢迎的；吸收剂中和到中性时，直接排放到废水预处理装置，不外排；而废气为合格处理气，直接排空。
附图说明
图1为本申请提出的一种污泥恶臭气体的处理系统的结构示意图。
具体实施方式
参照图1，本申请提出的一种污泥恶臭气体的处理系统，包括：空压机1、第一变压吸附塔2、第二变压吸附塔3、缓冲罐4、分解罐5、尾气洗涤塔6和真空装置7。
空压机1的入口用于接入待处理恶臭气体，其出口通过第一阀门K1连通第一变压吸附塔2的入口，并通过第二阀门K2连通第二变压吸附塔3的出口。本实施方式中，第一变压吸附塔2和第二变压吸附塔3内填充的吸附材料为沸石分子筛、活性炭、活性氧化铝、硅胶中的一种或几种，以便对输入的待处理恶臭气体进行吸附处理。空压机1用于将待处理恶臭气体压缩到0.2-2.0MPa后输入第一变压吸附塔2或第二变压吸附塔3，以提高第一变压吸附塔2和第二变压吸附塔3对待处理恶臭气体的吸附处理效 果。
第一变压吸附塔2的出口通过第三阀门K3连通分解罐5的入口，并通过第五阀门K5连通缓冲罐4的入口。第二变压吸附塔3的出口通过第四阀门K4连通分解罐5的入口，并通过第六阀门K6连通缓冲罐4的入口。本实施方式中，分解罐采用催化燃烧或光催化分解的方式进行去臭处理。
缓冲罐4的出口用于输出处理后的气体，具体的，缓冲罐4出口依次连通有污泥分离池和好氧曝气池。如此，缓冲罐4将第一变压吸附塔2或第二变压吸附塔3吸附处理后的气体输入污泥分离池和好氧曝气池进一步处理，以保证最终排出尾气的无污染。
分解罐5的出口连通尾气洗涤塔6的入口，尾气洗涤塔6的出口与真空装置7的入口连通，真空装置7用于排出尾气。
本实施方式中，该处理系统工作状态下，第一变压吸附塔2和第二变压吸附塔3中，一个处于吸附状态，另一个处于脱附状态。吸附状态下的第一变压吸附塔2或者第二变压吸附塔3作为吸附塔，脱附状态下的第一变压吸附塔2或者第二变压吸附塔3作为脱附塔。
空压机1、吸附塔和缓冲罐4依次连接构成第一流道，脱附塔、分解罐5、尾气洗涤塔6和真空装置7依次连接构成第二流道。第一阀门K1、第二阀门K2、第三阀门K3、第四阀门K4、第五阀门K5和第六阀门K6中，串联在第一流道上的阀门均处于导通状态，以保证第一流道的畅通，且脱附塔和分解罐5之间的阀门也处于导通状态，以保证第二流道的畅通，位于空压机1与脱附塔之间的阀门、脱附塔与缓冲罐4之间的阀门、吸附塔与分解罐5之间的阀门均处于截止状态，以避免吸附塔所在流道和脱附塔 所在流道串扰。
本实施方式中，工作状态下，待处理恶臭气体通过空压机1压缩后进入吸附塔进行吸附处理，然后通过缓冲罐进入后续处理工序处理以便无污染排放；当吸附塔内吸附的污染物增多，吸附塔内压强增大到一定程度，则将吸附塔切换为脱附塔，脱附塔与空压机1通过阀门断开连通，在真空装置7作用下，脱附塔出口端形成负压环境，从而使得脱附塔内截留的重污染气体流入分解罐5进行分解，分解后的气体通过尾气洗涤塔6洗涤后无污染排出。本实施方式中，真空装置7工作结束后，脱附塔处于负压状态，以保证在脱附塔再次切换成吸附塔时对气体的吸附效果。
本实施方式中，尾气洗涤塔6上还设有循环入口和循环出口，循环入口和循环出口通过循环泵8连通，如此，通过循环泵8可对尾气进行循环洗涤，从而保证排出尾气的无污染。本实施方式中，尾气洗涤塔所用洗涤溶剂为碳酸氢钠水溶液、碳酸钠水溶液、氢氧化钠水溶液中的一种或几种。
如图1所示，本实施例中，第一变压吸附塔2作为吸附塔，第二变压吸附塔3作为脱附塔。
本第一实施例中，收集汇总的恶臭气体经空压机压缩到1.0MPa(A)，同时关闭第二阀门K2、第三阀门K3和第六阀门K6，打开第一阀门K1、第四阀门K4和第五阀门K5，空压机1压缩的待处理恶臭气体进入装填颗粒活性炭的第一变压吸附塔，经充分吸附后的脱臭气体随后进入缓冲罐，根据实际生产需要，脱臭气体排入污泥分离池和好氧曝气池。
具体的，本实施例中，将第二变压吸附塔由吸附塔切换为脱附塔时，当第二变压吸附塔内部压力达到1atm(A)，即，脱附开始。
开启真空装置7，将第二变压吸附塔3内部压力调整到0.06MPa(A)，经2小时充分脱附后，关闭真空装置7，使得第二变压吸附塔3保持待用，方便进行脱附塔与吸附塔的切换。本实施例中，脱附过程中，富集后的恶臭气体在分解罐5中经TiO 2催化剂下，经254nm紫外线分解、氧化，由此生成的酸性气体被10％氢氧化钠水溶液在尾气洗涤塔中脱除，洁净气体经真空装置排空。
本第二实施例中，，收集汇总的恶臭气体经空压机压缩到1.2MPa(A)，同时关闭第一阀门K1、第四阀门K4和第五阀门K5，打开第二阀门K2、第三阀门K3和第六阀门K6，经空压机1压缩的气体进入装填颗粒活性炭的第二变压吸附塔，经充分吸附后的脱臭气体随后进入缓冲罐，根据实际生产需要，脱臭气体排入污泥分离池和好氧曝气池。
同时第一变压吸附塔处于脱附状态，第一变压吸附塔内部压力为1atm(A)时脱附开始，开启真空装置，维持第一变压吸附塔内压力0.05MPa(A)，经3小时充分脱附后，关闭真空装置，第一变压吸附塔保持待用；脱附过程中，富集后的恶臭气体在分解罐中，在TiO 2催化剂下，经365nm紫外线分解、氧化，由此生成的酸性气体被15％氢氧化钠水溶液在尾气洗涤塔中脱除，洁净气体经真空系统排空。
以上所述，仅为本申请涉及的较佳的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，根据本申请的技术方案及其申请构思加以等同替换或改变，都应涵盖在本申请的保护范围之内。

Claims (9)

  1. 一种污泥恶臭气体的处理系统，其特征在于，包括：空压机(1)、第一变压吸附塔(2)、第二变压吸附塔(3)、缓冲罐(4)、分解罐(5)、尾气洗涤塔(6)和真空装置(7)；
    空压机(1)的入口用于接入待处理恶臭气体，其出口通过第一阀门(K1)连通第一变压吸附塔(2)的入口，并通过第二阀门(K2)连通第二变压吸附塔(3)的出口；
    第一变压吸附塔(2)的出口通过第三阀门(K3)连通分解罐(5)的入口，并通过第五阀门(K5)连通缓冲罐(4)的入口；第二变压吸附塔(3)的出口通过第四阀门(K4)连通分解罐(5)的入口，并通过第六阀门(K6)连通缓冲罐(4)的入口；
    缓冲罐(4)的出口用于输出处理后的气体；分解罐(5)的出口连通尾气洗涤塔(6)的入口，尾气洗涤塔(6)的出口与真空装置(7)的入口连通，真空装置(7)用于排出尾气。
  2. 如权利要求1所述的污泥恶臭气体的处理系统，其特征在于，尾气洗涤塔(6)上还设有循环入口和循环出口，循环入口和循环出口通过循环泵(8)连通。
  3. 如权利要求1或2所述的污泥恶臭气体的处理系统，其特征在于，工作状态下，第一变压吸附塔(2)和第二变压吸附塔(3)中，一个处于吸附状态，另一个处于脱附状态；吸附状态下的第一变压吸附塔(2)或者第二变压吸附塔(3)作为吸附塔，脱附状态下的第一变压吸附塔(2)或 者第二变压吸附塔(3)作为脱附塔；
    空压机(1)、吸附塔和缓冲罐(4)依次连接构成第一流道，脱附塔、分解罐(5)、尾气洗涤塔(6)和真空装置(7)依次连接构成第二流道；第一阀门(K1)、第二阀门(K2)、第三阀门(K3)、第四阀门(K4)、第五阀门(K5)和第六阀门(K6)中，串联在第一流道上的阀门均处于导通状态，且脱附塔和分解罐(5)之间的阀门也处于导通状态，位于空压机(1)与脱附塔之间的阀门、脱附塔与缓冲罐(4)之间的阀门、吸附塔与分解罐(5)之间的阀门均处于截止状态。
  4. 如权利要求3所述的污泥恶臭气体的处理系统，其特征在于，空压机(1)用于将待处理恶臭气体压缩到0.2-2.0MPa后输入吸附塔。
  5. 如权利要求3所述的污泥恶臭气体的处理系统，其特征在于，真空装置(7)工作结束后，脱附塔处于负压状态。
  6. 如权利要求1所述的污泥恶臭气体的处理系统，其特征在于，第一变压吸附塔(2)和第二变压吸附塔(3)内填充的吸附材料为沸石分子筛、活性炭、活性氧化铝、硅胶中的一种或几种。
  7. 如权利要求1所述的污泥恶臭气体的处理系统，其特征在于，缓冲罐(4)出口依次连通有污泥分离池和好氧曝气池。
  8. 如权利要求1所述的污泥恶臭气体的处理系统，其特征在于，分解罐采用催化燃烧或光催化分解的方式进行去臭处理。
  9. 如权利要求1所述的污泥恶臭气体的处理系统，其特征在于，尾气洗涤塔所用洗涤溶剂为碳酸氢钠水溶液、碳酸钠水溶液、氢氧化钠水溶液中的一种或几种。
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