CN110882728A - Catalyst off-line cleaning method and device - Google Patents
Catalyst off-line cleaning method and device Download PDFInfo
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- CN110882728A CN110882728A CN201911069949.6A CN201911069949A CN110882728A CN 110882728 A CN110882728 A CN 110882728A CN 201911069949 A CN201911069949 A CN 201911069949A CN 110882728 A CN110882728 A CN 110882728A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/06—Washing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J38/00—Regeneration or reactivation of catalysts, in general
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J38/00—Regeneration or reactivation of catalysts, in general
- B01J38/04—Gas or vapour treating; Treating by using liquids vaporisable upon contacting spent catalyst
- B01J38/12—Treating with free oxygen-containing gas
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J38/00—Regeneration or reactivation of catalysts, in general
- B01J38/48—Liquid treating or treating in liquid phase, e.g. dissolved or suspended
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Abstract
The invention relates to a catalyst off-line cleaning method and a device, comprising the following steps: a dosing device, a cleaning tank and a back cleaning device; a medicine adding pipeline is arranged on the cleaning tank; the chemical feeding device is connected with the cleaning tank through the chemical feeding pipeline; a dosing groove is formed in the dosing device; the number of the medicine feeding grooves is at least 3; a mixing pipeline is arranged on the dosing device; the dosing groove is connected with the mixing pipeline. The method adopts an off-line catalyst cleaning mode, adopts chemical agents combined with gas cleaning, gas-water combined cleaning and water cleaning, and ensures the activation effect of the catalyst.
Description
Technical Field
The invention relates to the field of environmental protection, in particular to a catalyst off-line cleaning method and a catalyst off-line cleaning device.
Background
Heterogeneous ozone catalytic oxidation is an efficient sewage treatment technology and is widely applied to treatment of refractory wastewater. The technology mainly generates active free radicals with strong oxidizing property or improves reaction driving potential through the interaction among ozone, a catalyst and organic pollutants, thereby achieving the purpose of accelerating the degradation of organic matters or improving the oxidizing effect. The core of the technology is a catalyst, and in the case of a supported catalyst, the core is a catalyst active component on the surface of a carrier. In the running process of the ozone catalytic oxidation process, due to various reasons, the surface of the catalyst is polluted (for example, particles are intercepted on the surface of the catalyst due to more water inflow suspended matters, the catalyst is scaled due to high water inflow hardness, and partial ozone oxidation reaction products are adhered to the surface of the catalyst), the number of effective active point positions is gradually reduced, and the catalytic efficiency is gradually reduced. When the catalytic effect cannot meet the process treatment requirement, the catalyst needs to be replaced or activated. Therefore, there is a need for an off-line catalyst cleaning method and apparatus for activated regeneration of ozone catalysts and resource recycling.
Disclosure of Invention
The invention aims to provide a catalyst off-line cleaning method and a catalyst off-line cleaning device which are stable in work, can activate and regenerate an ozone catalyst and recycle resources.
In order to achieve the technical purpose, the technical scheme of the invention is a catalyst off-line cleaning method which is characterized by comprising the following steps:
s1, placing the deactivated catalyst in a cleaning tank, and injecting clear water through a backwashing pump until the water inlet of the circulating pump is submerged;
s2, starting a circulating pump to enable water in the cleaning tank to enter a water distribution system at the bottom of the cleaning tank through the circulating pump;
s3: the water upwards passes through the catalyst layer, and the air compressor is started to enable the compressed air in the compressed air tank to enter the cleaning tank through the air distribution system at the bottom of the cleaning tank, so that air and water are stirred and mixed;
s4, stirring and mixing by air water to ensure that the cleaning agent and the cleaning auxiliary agent are quickly diluted and uniformly dispersed and pass through the catalyst layer along with the circulating water flow;
s5, after the gas washing is finished, the circulating pump is turned off, the pump is switched to the backwashing pump, the clean water for backwashing is injected into the cleaning tank, the gas stirring is continued, and the impurities falling off from the surface of the catalyst are discharged into a backwashing water discharge tank along with the discharged water;
and S6, stopping the compressed air after the air-water combined cleaning is finished, continuing cleaning with clean water, replacing the cleaning water in the cleaning tank for 3 times, and finishing the cleaning.
The method has the advantages that the catalyst is cleaned fully by adopting an off-line cleaning catalyst form and adopting chemical agents in combination with gas cleaning, air-water combined cleaning and water cleaning, and the activation effect of the catalyst is ensured.
Further, the step S3 further includes the following steps:
a1, starting the dosing pump A, the dosing pump B and the dosing pump C simultaneously, and starting to input cleaning agent A, cleaning agent B and cleaning agent C simultaneously;
a2: and after being mixed, the cleaning agent A, the cleaning agent B and the cleaning agent C are input into the water distribution pipeline, and the mixture is injected into the cleaning tank through the water distribution pipeline.
Further, the step S5 further includes the following steps:
b1, air is introduced into the water distribution pipeline at the lower end of the compressed air tank, and the air is stirred through the air inlet;
and B2, continuously adding clean water into the backwashing pump while stirring by the gas, and cleaning impurities by the clean water and the gas simultaneously.
Further, the backwash pump and the circulation pump are continuously switched to be used in step S6
An off-line catalyst cleaning device comprising: a dosing device, a cleaning tank and a backwashing device;
a medicine adding pipeline is arranged on the cleaning tank; the dosing device is connected with the cleaning tank through the dosing pipeline; a dosing groove is formed in the dosing device; the number of the medicine feeding grooves is at least 3; a mixing pipeline is arranged on the dosing device; the dosing groove is connected with the mixing pipeline.
Furthermore, a first water distributor and a second water distributor are arranged in the cleaning tank; the mixing pipeline is connected with the first water distributor; and a catalyst is arranged in the cleaning tank. Through the action of the catalyst, the deactivated catalyst can be better activated, and the working effect is ensured.
Further, an air inlet device is arranged on the reverse cleaning device; an air inlet pipeline is arranged on the air inlet device; the air inlet pipeline is connected with the second water distributor. Through the effect of the air inlet pipeline, the wind flow is transferred to the bottom end of the cleaning tank and then stirred by wind power.
Furthermore, a clear water pipeline and a water outlet pipeline are arranged in the cleaning tank; the clean water pipeline is connected with the first water distributor; the clear water pipeline is provided with a working pump; the water outlet pipeline is connected with a clear water pipeline through the working pump.
Furthermore, a backwashing drainage tank is arranged on the cleaning tank. And the wastewater is discharged under the action of backwashing the drainage tank.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of an off-line catalyst cleaning method and apparatus according to the present invention.
The corresponding part names indicated by the numbers in the figures:
1. a dosing device; 2. a cleaning tank; 3. a backwashing device; 4. a dosing pipeline; 5. A medicine feeding groove; 6. a dosing pump; 7. a mixing duct; 8. a first water distributor; 9. a second water distributor; 10. a catalyst; 11. an air inlet pipeline; 12. an air intake device; 13. a clear water pipeline; 14. a water outlet pipeline; 15. a working pump; 16. and (4) backwashing the drainage tank.
Detailed Description
The present invention will be further described in detail with reference to the following specific examples:
the invention aims to provide a catalyst off-line cleaning method and a catalyst off-line cleaning device which are stable in work, can activate and regenerate an ozone catalyst and recycle resources.
In order to achieve the technical purpose, the technical scheme of the invention is a catalyst off-line cleaning method which is characterized by comprising the following steps:
s1, placing the deactivated catalyst in a cleaning tank, and injecting clear water through a backwashing pump until the water inlet of the circulating pump is submerged;
s2, starting a circulating pump to enable water in the cleaning tank to enter a water distribution system at the bottom of the cleaning tank through the circulating pump;
s3: the water upwards passes through the catalyst layer, and the air compressor is started to enable the compressed air in the compressed air tank to enter the cleaning tank through the air distribution system at the bottom of the cleaning tank, so that air and water are stirred and mixed;
s4, stirring and mixing by air water to ensure that the cleaning agent and the cleaning auxiliary agent are quickly diluted and uniformly dispersed and pass through the catalyst layer along with the circulating water flow;
s5, after the gas washing is finished, the circulating pump is turned off, the pump is switched to the backwashing pump, the clean water for backwashing is injected into the cleaning tank, the gas stirring is continued, and the impurities falling off from the surface of the catalyst are discharged into a backwashing water discharge tank along with the discharged water;
and S6, stopping the compressed air after the air-water combined cleaning is finished, continuing cleaning with clean water, replacing the cleaning water in the cleaning tank for 3 times, and finishing the cleaning.
The method has the advantages that the catalyst is cleaned fully by adopting an off-line cleaning catalyst form and adopting chemical agents in combination with gas cleaning, air-water combined cleaning and water cleaning, and the activation effect of the catalyst is ensured.
Further, the step S3 further includes the following steps:
a1, starting the dosing pump A, the dosing pump B and the dosing pump C simultaneously, and starting to input cleaning agent A, cleaning agent B and cleaning agent C simultaneously;
a2: and after being mixed, the cleaning agent A, the cleaning agent B and the cleaning agent C are input into the water distribution pipeline, and the mixture is injected into the cleaning tank through the water distribution pipeline.
Further, the step S5 further includes the following steps:
b1, air is introduced into the water distribution pipeline at the lower end of the compressed air tank, and the air is stirred through the air inlet;
and B2, continuously adding clean water into the backwashing pump while stirring by the gas, and cleaning impurities by the clean water and the gas simultaneously.
Further, the backwash pump and the circulation pump are continuously switched to be used in step S6.
As shown in fig. 1, an off-line catalyst cleaning apparatus includes: the device comprises a dosing device 1, a cleaning tank 2 and a backwashing device 3;
a medicine adding pipeline 4 is arranged on the cleaning tank 2; the dosing device 1 is connected with the cleaning tank 2 through the dosing pipeline 4; a dosing groove 5 is formed in the dosing device 4; the number of the medicine feeding grooves 5 is at least 3; a mixing pipeline 7 is arranged on the dosing device; the dosing groove 5 is connected with the mixing pipeline 7.
Further, a first water distributor 8 and a second water distributor 9 are arranged in the cleaning tank 2; the mixing pipeline 7 is connected with the first water distributor 8; a catalyst 10 is arranged in the cleaning tank 2. Through the action of the catalyst 10, the deactivated catalyst 10 can be better activated, and the working effect is ensured.
Further, an air inlet device 12 is arranged on the backwashing device 3; an air inlet pipeline 11 is arranged on the air inlet device 12; the air inlet pipeline 11 is connected with the second water distributor 9. The wind flow is transferred to the bottom end of the cleaning tank 2 to stir by wind power under the action of the air inlet pipeline 11.
Further, a clear water pipeline 13 and a water outlet pipeline 14 are arranged in the cleaning tank 2; the clean water pipeline 13 is connected with the first water distributor 8; the clean water pipeline 13 is provided with a working pump 15; the water outlet pipe 14 is connected with the clean water pipe 13 through the working pump 15.
Furthermore, a backwashing water discharge tank 16 is arranged on the cleaning tank 2. The wastewater is discharged by the action of the backwash wastewater tank 16.
In actual operation, the deactivated catalyst is placed in the cleaning tank 2, and clean water is injected through the backwashing pump to submerge the water inlet of the circulating pump. And (3) starting a circulating pump to enable water in the cleaning tank 2 to enter a water distribution system at the bottom of the cleaning tank 2 through the circulating pump and upwards pass through a catalyst, and starting an air compressor to enable compressed air in a compressed air tank to enter the cleaning tank 2 through an air distribution system at the bottom of the cleaning tank 2 to achieve air-water stirring and mixing. On the basis, a medicine adding pump A, a medicine adding pump B and a medicine adding pump C are started, and a cleaning agent A, a cleaning assistant B and a cleaning assistant C are respectively injected into the cleaning tank 2. The cleaning agent and the cleaning auxiliary agent are quickly diluted and uniformly dispersed by stirring and mixing with air and water, and pass through the catalyst layer along with circulating water flow, and pollutants fall off from the surface of the catalyst under the action of the agent in the process. After the gas washing is carried out for a period of time, the circulating pump is stopped, the pump is switched to the backwashing pump, the clean water for backwashing is injected into the washing tank 2, and then the gas stirring is continued, so that the impurities falling off from the surface of the catalyst 10 are discharged into the backwashing water discharge tank along with the discharged water. After the air-water combined cleaning is carried out for a period of time, the compressed air is stopped, the cleaning is continued by using clean water, and the cleaning water in the cleaning tank 2 is replaced for 3 times. The cleaning process is ended. In the process, the backwashing circulating pump is shared, and the backwashing clear water pump can be used as a circulating pump.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. The off-line cleaning method of the catalyst is characterized by comprising the following steps of:
s1, placing the deactivated catalyst in a cleaning tank, and injecting clear water through a backwashing pump until the water inlet of the circulating pump is submerged;
s2, starting a circulating pump to enable water in the cleaning tank to enter a water distribution system at the bottom of the cleaning tank through the circulating pump;
s3: the water upwards passes through the catalyst layer, and the air compressor is started to enable the compressed air in the compressed air tank to enter the cleaning tank through the air distribution system at the bottom of the cleaning tank, so that air and water are stirred and mixed;
s4, stirring and mixing by air water to ensure that the cleaning agent and the cleaning auxiliary agent are quickly diluted and uniformly dispersed and pass through the catalyst layer along with the circulating water flow;
s5, after the gas washing is finished, the circulating pump is turned off, the pump is switched to the backwashing pump, the clean water for backwashing is injected into the cleaning tank, the gas stirring is continued, and the impurities falling off from the surface of the catalyst are discharged into a backwashing water discharge tank along with the discharged water;
and S6, stopping the compressed air after the air-water combined cleaning is finished, continuing cleaning with clean water, replacing the cleaning water in the cleaning tank for 3 times, and finishing the cleaning.
2. The off-line catalyst cleaning method according to claim 1, wherein the step S3 further comprises the following steps:
a1, starting the dosing pump A, the dosing pump B and the dosing pump C simultaneously, and starting to input cleaning agent A, cleaning agent B and cleaning agent C simultaneously;
a2: and after being mixed, the cleaning agent A, the cleaning agent B and the cleaning agent C are input into a water distribution pipeline, and the mixture is injected into the cleaning tank through the water distribution pipeline.
3. The off-line catalyst cleaning method according to claim 1, wherein the step S5 further comprises the following steps:
b1, air is introduced into the water distribution pipeline at the lower end of the compressed air tank, and the air is stirred through the air inlet;
and B2, continuously adding clean water into the backwashing pump while stirring by the gas, and cleaning impurities by the clean water and the gas simultaneously.
4. The off-line catalyst cleaning method according to claim 1, wherein the backwashing pump and the circulating pump are continuously switched to be used in step S6.
5. An off-line catalyst cleaning device, comprising: a dosing device, a cleaning tank and a back cleaning device;
a medicine adding pipeline is arranged on the cleaning tank; the chemical feeding device is connected with the cleaning tank through the chemical feeding pipeline; a dosing groove is formed in the dosing device; the number of the medicine feeding grooves is at least 3; a mixing pipeline is arranged on the dosing device; the dosing groove is connected with the mixing pipeline.
6. The offline catalyst cleaning device according to claim 5, wherein: a first water distributor and a second water distributor are arranged in the cleaning tank; the mixing pipeline is connected with the first water distributor; and a catalyst is arranged in the cleaning tank.
7. The offline catalyst cleaning device according to claim 6, wherein: an air inlet device is arranged on the backwashing device; an air inlet pipeline is arranged on the air inlet device; the air inlet pipeline is connected with the second water distributor.
8. The offline catalyst cleaning device according to claim 6, wherein: a clear water pipeline and a water outlet pipeline are arranged in the cleaning tank; the clean water pipeline is connected with the first water distributor; the clear water pipeline is provided with a working pump; the water outlet pipeline is connected with the clear water pipeline through the working pump.
9. The offline catalyst cleaning device according to claim 5, wherein: and a backwashing drainage tank is arranged on the cleaning tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911069949.6A CN110882728A (en) | 2019-11-05 | 2019-11-05 | Catalyst off-line cleaning method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911069949.6A CN110882728A (en) | 2019-11-05 | 2019-11-05 | Catalyst off-line cleaning method and device |
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| Publication Number | Publication Date |
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| CN110882728A true CN110882728A (en) | 2020-03-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911069949.6A Withdrawn CN110882728A (en) | 2019-11-05 | 2019-11-05 | Catalyst off-line cleaning method and device |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005040680A (en) * | 2003-07-25 | 2005-02-17 | Anest Iwata Corp | Method of washing two-liquid mixing controller |
| CN201538699U (en) * | 2009-11-26 | 2010-08-04 | 中山大学 | Wastewater treatment device for online-cleaning catalytic particles |
| CN206027461U (en) * | 2016-08-29 | 2017-03-22 | 天津市华博水务有限公司 | Can abluent backwash segmented filter of automatic on -line |
| CN106621812A (en) * | 2016-12-26 | 2017-05-10 | 宁波中科科创新能源科技有限公司 | Nano catalyst full-automatic cleaning device |
| CN207404920U (en) * | 2017-09-30 | 2018-05-25 | 北京海绵城市建设工程有限公司 | A kind of catalytic ozonation system for organic wastewater with difficult degradation thereby |
| CN207547198U (en) * | 2017-11-16 | 2018-06-29 | 中持水务股份有限公司 | A kind of chemically-cleaning device of filter plant |
| CN207619086U (en) * | 2017-04-05 | 2018-07-17 | 绍兴柯桥江滨水处理有限公司 | A kind of catalytic ozonation tower for treatment of dyeing wastewater |
-
2019
- 2019-11-05 CN CN201911069949.6A patent/CN110882728A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005040680A (en) * | 2003-07-25 | 2005-02-17 | Anest Iwata Corp | Method of washing two-liquid mixing controller |
| CN201538699U (en) * | 2009-11-26 | 2010-08-04 | 中山大学 | Wastewater treatment device for online-cleaning catalytic particles |
| CN206027461U (en) * | 2016-08-29 | 2017-03-22 | 天津市华博水务有限公司 | Can abluent backwash segmented filter of automatic on -line |
| CN106621812A (en) * | 2016-12-26 | 2017-05-10 | 宁波中科科创新能源科技有限公司 | Nano catalyst full-automatic cleaning device |
| CN207619086U (en) * | 2017-04-05 | 2018-07-17 | 绍兴柯桥江滨水处理有限公司 | A kind of catalytic ozonation tower for treatment of dyeing wastewater |
| CN207404920U (en) * | 2017-09-30 | 2018-05-25 | 北京海绵城市建设工程有限公司 | A kind of catalytic ozonation system for organic wastewater with difficult degradation thereby |
| CN207547198U (en) * | 2017-11-16 | 2018-06-29 | 中持水务股份有限公司 | A kind of chemically-cleaning device of filter plant |
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Application publication date: 20200317 |