CN208494245U - A kind of SCR catalyst regeneration device - Google Patents
A kind of SCR catalyst regeneration device Download PDFInfo
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- CN208494245U CN208494245U CN201821010309.9U CN201821010309U CN208494245U CN 208494245 U CN208494245 U CN 208494245U CN 201821010309 U CN201821010309 U CN 201821010309U CN 208494245 U CN208494245 U CN 208494245U
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Abstract
The utility model discloses a kind of SCR catalyst regeneration devices, including microwave heating equipment, reaction vessel, vacuum evacuation device and waste liquid pool, the reaction vessel is set in microwave heating equipment, and it is heated by microwave heating equipment to medium in reaction vessel, it is connected by negative-pressure pipeline with vacuum evacuation device at the top of the reaction vessel, it is respectively equipped with the water inlet with valve and the outlet pipe with valve at the top and bottom of reaction vessel, the water outlet pipe end is connected in waste liquid pool.Utility model device is a kind of regenerating unit based on microwave cooperating effect, is regenerated using microwave to inactivation SCR catalyst under condition of negative pressure, the denitration efficiency of favorable regeneration effect, the inactivation SCR catalyst after regenerating is higher.
Description
Technical field
The utility model belongs to catalyst regeneration techniques field, is related to a kind of catalyst regeneration device, and in particular to a kind of
SCR catalyst word regenerating unit.
Background technique
NOXIt is a kind of main atmosphere pollution, refers to the general name of a kind of gas component such as NO, NO2 and N2O, it is main
From the burning of fossil fuel.Thermal power generation is the main generation mode in China, and accounting is more than 70%, the master of thermal power generation
Wanting raw material is coal, can generate a large amount of NO in combustion processXIt will cause serious environment if be directly discharged among atmosphere
Pollution problem threatens to human health, causes the various respiratory diseases of human body, death is resulted even in when serious.
Selective catalytic reduction (SCR) is current industrial most widely used NOx minimizing technology, and catalyst is then this
The core of technology, current business SCR catalyst are V2O5-WO3/TiO2Catalyst can be shown excellent in denitration reaction
Good NOx removal efficiency.But flying dust, alkali metal, SO in industrial smoke2Presence with vapor can generate poison for catalyst
Evil effect causes catalyst gradually to inactivate due to poisoning, duct blocking and loss of active component etc., and SCR catalyst makes
It is usually no more than 3 years with the service life, the replacement of catalyst is a huge expense, and replaced catalyst is due to containing
V, the toxic elements such as W can also be to welding, therefore washing has now been developed and adds active group grading mode to come to catalysis
Agent is regenerated, to realize better economic benefit and environmental benefit.
Microwave has a wide range of applications as a kind of quick and efficient heating method in chemical field, catalyst again
It is heated during life using microwave, the quick heating without temperature gradient of catalyst from inside to outside may be implemented, make moisture
Quickly concussion, play the role of stirring, simultaneously because the rapid evaporation of vapor can also improve catalyst cellular structure and
Specific surface area enhances the denitration ability of catalyst.Negative pressure can make catalyst duct loose as a kind of novel reaction condition,
So that the various noxious materials and flying dust that can deposit in more thorough catalyst duct in the process, but in currently available technology
Microwave heating collaboration condition of negative pressure is used for the precedent of SCR catalyst regeneration by SCR catalyst regeneration not yet.
Utility model content
The utility model provides a kind of device, realizes the combination of microwave heating and condition of negative pressure in the process, makes
SCR catalyst must be regenerated with better denitration performance.
In order to achieve the above objectives, the technical solution adopted in the utility model is as follows:
A kind of SCR catalyst regeneration device, it is characterised in that: including microwave heating equipment, reaction vessel, vacuum evacuation device
And waste liquid pool, the reaction vessel is set in microwave heating equipment, and is added by microwave heating equipment to medium in reaction vessel
Heat, the reaction vessel top are connected by negative-pressure pipeline with vacuum evacuation device, are respectively equipped with band at the top and bottom of reaction vessel
The water inlet of valve and outlet pipe with valve, the water outlet pipe end are connected in waste liquid pool.
As an improvement, the microwave heating equipment is micro-wave oven, heating power is 200~700W.
As an improvement, the reaction vessel is closed glass container, passes through flexible rubber hose at the top of glass container and vacuumize
Device is connected.
As an improvement, the vacuum means are set to vacuum pump, the vacuum pump maximum vacuum is 80~100kPa.
As an improvement, the water inlet is funnel-shaped water inlet, the valve below water inlet is operated pneumatic valve or electronic
Valve.
As an improvement, the outlet pipe is set at reaction container bottom low spot, valve on outlet pipe be operated pneumatic valve or
Person's electrically operated valve, water outlet pipe end are located at waste liquid pool upper end.
The utility model beneficial effect is:
Utility model device is acted on using microwave cooperating, using microwave to inactivation SCR catalyst under condition of negative pressure
It is regenerated, favorable regeneration effect, the denitration efficiency of the inactivation SCR catalyst after regenerating is higher；Regenerative process is simple, at low cost
It is honest and clean, there is larger economic use value.
Detailed description of the invention
Fig. 1 is the utility model SCR catalyst regeneration schematic device.
Appended drawing reference: 1- water inlet, 2- reaction vessel, 3- flowing water Valve, 4- outlet pipe, 5- flexible rubber hose, 6- microwave heating
Device, 7- vacuum pump, 8- inlet valve, 9- waste liquid pool.
Specific embodiment
It, below will be to embodiment or in the prior art attached in order to be better understood by the working principle of utility model device
Figure is simply introduced, those skilled in the art in actual application can again on the basis of carry out perfect, do not having
There is new embodiment obtained under the premise of paying the creation type fruit of labour, belongs to the model of the utility model patent protection
It encloses.
As shown in Figure 1, a kind of SCR catalyst regeneration device, including microwave heating equipment 6, reaction vessel 2, vacuum means
It sets and is set in microwave heating equipment 6 with waste liquid pool 9, the reaction vessel 2, and give reaction vessel 2 by microwave heating equipment 6
Interior medium heats, and is connected by negative-pressure pipeline (flexible rubber hose 5) with vacuum evacuation device at the top of the reaction vessel 2, reaction vessel 2
Top is equipped with water inlet 1, and inlet valve 8 is equipped between water inlet 1 and reaction vessel 2, passes through at 2 bottom low spot of reaction vessel
Water pipe 4 is communicated to waste liquid pool 9, and outlet pipe 4 is equipped with flowing water Valve 3, and 4 end of outlet pipe is connected in waste liquid pool 9；It is described
Microwave heating equipment 6 is micro-wave oven, and heating power is 200~700W；In the present embodiment, the vacuum means are set to vacuum pump
7,7 maximum vacuum of vacuum pump is 80~100kPa, can provide the reaction item of 50~80kPa vacuum degree for reaction vessel 2
Part；The reaction vessel 2 is closed glass container, is connected by flexible rubber hose with vacuum pump 7 at the top of glass container.
In the present embodiment, the water inlet 1 is funnel-shaped water inlet 1, the valve of the lower section of water inlet 1 be operated pneumatic valve or
Electrically operated valve；The outlet pipe 4 is set at 2 bottom low spot of reaction vessel, and the valve on outlet pipe 4 is operated pneumatic valve or electronic
Valve, 4 end of outlet pipe are located at 9 upper end of waste liquid pool.
In the present embodiment, SCR catalyst refers to V2O5-WO3/TiO2Catalyst carries out regeneration act by taking the catalyst as an example below
Example explanation:
Embodiment 1: alkali metal poisoning plate denitrating catalyst regeneration
The present embodiment SCR catalyst regeneration device, including microwave heating equipment 6, are placed in microwave for sealed reaction vessel 2 and add
The microwave heating section of thermal 6,2 top of reaction vessel of sealing are equipped with the water inlet 1 reached outside microwave heating equipment 6,
Water inlet 1 is infundibulate, and lives to switch by valve control, and there are one gas outlets to pass through flexible rubber hose 5 and true for the top of reaction vessel 2
Sky pump 7 is connected, and lower end is equipped with water outlet, and water outlet is communicated to the top of waste liquid pool 9 by outlet pipe 4, the switch of outlet pipe 4 also by
Flowing water Valve 3 is controlled, and the waste liquid generated in catalyst regeneration process is all discharged among waste liquid pool 9.
Plate catalyst is regenerated using above-mentioned apparatus, concrete technology flow process is as follows:
(1) it washes: plate catalyst being put into sealed reaction vessel 2, flowing water Valve 3 is closed, added by water inlet 1
Enter deionized water until submerging SCR catalyst, closes inlet valve 8, open microwave heating equipment 6 and vacuum pump 7, microwave heating
Power is set as 210W, and vacuum degree is adjusted to 50kPa, washes 10min, closes microwave heating equipment 6 and vacuum pump 7, opens water outlet
Valve 3, discharge washing waste liquid.
(2) it is chemically treated: closing flowing water Valve 3,0.5mol/L sulfuric acid solution is added by water inlet 1 and submerges catalyst,
Close inlet valve 8.It opens microwave heating equipment 6 and vacuum pump 7, microwave heating power is set as 210W, vacuum degree is adjusted to
50kPa, pickling 25min close microwave heating equipment 6 and vacuum pump 7, open flowing water Valve 3, and pickle liquor is discharged.
(3) dry: to close flowing water Valve 3, open microwave heating equipment 6 and vacuum pump 7, microwave heating power are set as
210W, vacuum degree are adjusted to 50kPa, and dry 10min closes microwave heating equipment 6 and vacuum pump 7, take out regeneration SCR catalysis
Agent.
(4) active testing: regeneration SCR catalyst and unregenerated SCR catalyst are ground up, sieved, and it is de- to carry out simulated flue gas
Nitre, air speed 8000h-1, smoke NOx content 300mg/m3, flue gas flow rate 35L/min, ammonia nitrogen molar ratio is 1:1, reaction
Temperature is 250 DEG C, and the denitration efficiency of regenerated catalyst reaches 85.1%, and unmodified catalyst denitration efficiency is 47.6%.
Embodiment 2: arsenic poisoning honeycomb-shaped SCR catalyst regeneration
(1) it washes: plate catalyst being put into the reaction vessel 2 of sealing, flowing water Valve 3 is closed, passes through water inlet 1
Deionized water is added until submerging SCR catalyst, closes inlet valve 8, opens microwave heating equipment 6 and vacuum pump 7, microwave adds
Thermal power is set as 500W, and vacuum degree is adjusted to 60kPa, washes 15min, closes microwave heating equipment 6 and vacuum pump 7, opens out
Penstock 3, discharge washing waste liquid.
(2) it is chemically treated: closing flowing water Valve 3, the submergence catalysis of 0.5mol/L sodium hydroxide solution is added by water inlet 1
Inlet valve 8 is closed in agent.It opens microwave heating equipment 6 and vacuum pump 7, microwave heating power is set as 500W, vacuum degree is adjusted to
60kPa, alkali cleaning 30min close microwave heating equipment 6 and vacuum pump 7, open flowing water Valve 3, and alkali-washing waste liquid is discharged.
(3) dry: to close flowing water Valve 3, open microwave heating equipment 6 and vacuum pump 7, microwave heating power are set as
500W, vacuum degree are adjusted to 60kPa, and dry 10min closes microwave heating equipment 6 and vacuum pump 7, take out regeneration SCR catalysis
Agent.
(4) active testing: regeneration SCR catalyst and unregenerated SCR catalyst are ground up, sieved, and it is de- to carry out simulated flue gas
Nitre, air speed 10000h-1, smoke NOx content 350mg/m3, flue gas flow rate 40L/min, ammonia nitrogen molar ratio is 1:1, reaction
Temperature is 300 DEG C, and the denitration efficiency of regenerated catalyst reaches 82.7%, and unmodified catalyst denitration efficiency is 51.6%.
Embodiment 3: compound inactivation SCR catalyst regeneration
(1) it washes: plate catalyst being put into the reaction vessel 2 of sealing, flowing water Valve 3 is closed, passes through water inlet 1
Deionized water is added until submerging SCR catalyst, closes inlet valve 8, opens microwave heating equipment 6 and vacuum pump 7, microwave adds
Thermal power is set as 700W, and vacuum degree is adjusted to 70kPa, washes 20min, closes microwave heating equipment 6 and vacuum pump 7, opens out
Penstock 3, discharge washing waste liquid.
(2) pickling: closing flowing water Valve 3, and 0.5mol/L sulfuric acid solution is added by water inlet 1 and submerges catalyst, closes
Inlet valve 8.It opens microwave heating equipment 6 and vacuum pump 7, microwave heating power is set as 700W, vacuum degree is adjusted to 70kPa,
Pickling 30min closes microwave heating equipment 6 and vacuum pump 7, opens flowing water Valve 3, and pickle liquor is discharged.
(3) close flowing water Valve 3, by water inlet 1 be added 0.5mol/L sodium hydroxide solution submerge catalyst, close into
Penstock 8.It opens microwave heating equipment 6 and vacuum pump 7, microwave heating power is set as 700W, vacuum degree is adjusted to 70kPa, alkali
30min is washed, microwave heating equipment 6 and vacuum pump 7 are closed, opens flowing water Valve 3, alkali-washing waste liquid is discharged.
(4) active component loads: closing flowing water Valve 3,0.05mol/L ammonium metavanadate and 0.1mol/L ammonium metatungstate is added
Mixed solution submerge SCR catalyst, open vacuum pump 7, vacuum degree is adjusted to 70kPa, impregnates 2h, closes vacuum pump 7, opens
Waste liquid is discharged in flowing water Valve 3.
(5) dry: to close flowing water Valve 3, open microwave heating equipment 6 and vacuum pump 7, microwave heating power are set as
700W, vacuum degree are adjusted to 70kPa, and dry 10min closes microwave heating equipment 6 and vacuum pump 7, take out regeneration SCR catalysis
Agent.
(6) active testing: regeneration SCR catalyst and unregenerated SCR catalyst are ground up, sieved, and it is de- to carry out simulated flue gas
Nitre, air speed 12000h-1, smoke NOx content 400mg/m3, flue gas flow rate 45L/min, ammonia nitrogen molar ratio is 1:1, reaction
Temperature is 350 DEG C, and the denitration efficiency of regenerated catalyst reaches 92.7%, and unmodified catalyst denitration efficiency is 39.1%.
Above-described embodiment is the preferred embodiment of the utility model creation for the further detailed of technical solution
Illustrate, rather than specific embodiment of the present utility model is only limitted among above description, for a person skilled in the art,
Without departing from the concept of the premise utility, several simple changes made belong to the protection of the utility model creation
Range.
Claims (6)
1. a kind of SCR catalyst regeneration device, it is characterised in that: including microwave heating equipment, reaction vessel, vacuum evacuation device and
Waste liquid pool, the reaction vessel are set in microwave heating equipment, and are heated by microwave heating equipment to medium in reaction vessel,
It is connected by negative-pressure pipeline with vacuum evacuation device at the top of the reaction vessel, band valve is respectively equipped at the top and bottom of reaction vessel
Water inlet and outlet pipe with valve, the water outlet pipe end be connected in waste liquid pool.
2. SCR catalyst regeneration device as described in claim 1, it is characterised in that: the microwave heating equipment is micro-wave oven,
Its heating power is 200~700W.
3. SCR catalyst regeneration device as described in claim 1, it is characterised in that: the reaction vessel is closed glass
Container, glass container top are connected by flexible rubber hose with vacuum evacuation device.
4. SCR catalyst regeneration device as claimed in claim 3, it is characterised in that: the vacuum means are set to vacuum pump, institute
Stating vacuum pump maximum vacuum is 80~100kPa.
5. SCR catalyst regeneration device as described in claim 1, it is characterised in that: the water inlet is funnel-shaped water inlet,
Valve below water inlet is operated pneumatic valve or electrically operated valve.
6. SCR catalyst regeneration device as described in claim 1, it is characterised in that: the outlet pipe is set to reaction vessel bottom
At portion's low spot, the valve on outlet pipe is operated pneumatic valve or electrically operated valve, and water outlet pipe end is located at waste liquid pool upper end.
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| CN201821010309.9U CN208494245U (en) | 2018-06-28 | 2018-06-28 | A kind of SCR catalyst regeneration device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821010309.9U CN208494245U (en) | 2018-06-28 | 2018-06-28 | A kind of SCR catalyst regeneration device |
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| CN208494245U true CN208494245U (en) | 2019-02-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113019471A (en) * | 2021-02-07 | 2021-06-25 | 铜仁市诚一环保科技有限公司 | Cleaning method and equipment for denitration catalyst |
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2018
- 2018-06-28 CN CN201821010309.9U patent/CN208494245U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113019471A (en) * | 2021-02-07 | 2021-06-25 | 铜仁市诚一环保科技有限公司 | Cleaning method and equipment for denitration catalyst |
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