CN206720920U - A kind of desulfurization absorbing liquid purifying processing device - Google Patents
A kind of desulfurization absorbing liquid purifying processing device Download PDFInfo
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- CN206720920U CN206720920U CN201720490011.1U CN201720490011U CN206720920U CN 206720920 U CN206720920 U CN 206720920U CN 201720490011 U CN201720490011 U CN 201720490011U CN 206720920 U CN206720920 U CN 206720920U
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Abstract
The utility model discloses a kind of desulfurization absorbing liquid purifying processing device, the desulfurization absorbing liquid purifying processing device includes lime precipitation groove (1), filter press (2) hydrofluoric acid subsider (3) and filter (4), the feed end of the lime precipitation groove (1) connects with the poor flow container (6) on desulfurization production line, the discharge end of lime precipitation groove (1) is connected to the feed end of the filter press (2), the feed end of the hydrofluoric acid subsider (3) is connected with the drain side of the filter press (2), the discharge end of hydrofluoric acid subsider (3) is connected to the feed end of the filter (4), the outlet end of the filter (4) is connected by circulation line (5) with the poor flow container (6).The desulfurization absorbing liquid purifying processing device treatment effeciency is high, economic and environment-friendly.
Description
Technical field
It the utility model is related to environmental technology field, and in particular to a kind of desulfurization absorbing liquid purifying processing device.
Background technology
The sulfur-containing smoke gas of the enterprises such as steel, non-ferrous metal metallurgy, thermal power generation, sulfuric acid discharge is the primary pollution source of air
One of.In recent years, as the fast development of China's economy, the environmental consciousness of people improve constantly, government is to air pollution emission
The control standard of thing is also more and more stricter.Traditional desulfurization technology has been difficult to meet increasingly strict environmental requirement, to a certain degree
On accelerate the innovation speed of desulfurization technology.Wherein, it is the regenerating desulfurization technology of representative with desulfuration efficiency using organic amine desulfurization
Height, desulfurization absorbing liquid reusable edible, the advantages that accessory substance economic value is high by more and more enterprises favor and accreditation.
Organic amine sulfur removal technology refers to a kind of wet desulfurizing process using organic amine as desulfurization absorbing liquid principal component.It is this de-
Sulphur technique is mainly characterized by making to absorb SO by way of external heat source (being usually low-pressure steam)2Absorbing liquid
(commonly referred to as rich solution) desorbs high-purity SO2Gas, absorbing liquid are regenerated (commonly referred to as lean solution), recover to absorb SO again2
Ability.
But the SO usually contained in flue gas during smelting3, the metal such as highly acid gas and Cu, Pb, Sb such as HF, HCl from
Son, these sour gas and metal ion can enter in absorbing liquid with sweetening process；In addition, the SO in rich solution3 2-Also can part
It is oxidized to SO4 2-.These strong acid radical ions and impurity metal ion can not be discharged by desorption and regeneration, so as to constantly de-
It is enriched with sulphur absorbing liquid, causes organic amine absorbing liquid to deteriorate, is caused absorbing liquid desulfuration efficiency to reduce, pH declines, cause very big
Equipment corrosion risk, and difficulty is caused to system operation, whole desulphurization system can be caused to paralyse when serious.
Therefore, in organic amine sulfur removal technology, it is necessary to be equipped with and absorb liquid purification system to the impurity in organic amine absorbing liquid
Ion is periodically removed, and ensures the quality of absorbing liquid.At present, the purification treatment technology of organic amine absorbing liquid mainly has ion friendship
Change resin method and electroosmose process.Wherein there is device complexity, operating cost high (resin price height, alkaline consumption in ion-exchange-resin process
It is high), the shortcomings of efflux wastewater amount is big, sodium ion is easily enriched with；Electroosmose process equipment is expensive, permselectivity membrane does not have universality
(need to select different films for the ion of different valence state), operating cost height, the problems such as maintenance workload is big, constraining it is having
Application in the purification of machine amine absorbing liquid.
Document number is that CN102815820A patent document discloses SO in a kind of removing flue gas desulfurization solution4 2-、Cl-'s
Device and technique.The device adds filter and adsorption tank in ion exchange resin column front end, still falls within ion-exchange
Category.Filtering and absorption can extend the service life of resin to a certain extent, but the device still suffer from equipment investment it is larger,
Operating cost is high, has the problem of being arranged outside waste water.
Patent document number CN202161906U document proposes a kind of more novel side line desulfuration solution purifier.
The device by the solid impurity in sedimentation filtration removing system, adds sodium hydroxide and removes a part huge sum of money in absorbing liquid first
Belong to ion, then chilled method separates out caused sodium sulphate, reaches the purpose for removing sulfate radical in absorbing liquid.The plant running mistake
Cheng Zhongxu consumes substantial amounts of sodium hydroxide, and operating cost is high.Though byproduct saltcake can be reclaimed in subsequently increase crystallization apparatus,
Heavy metal present in absorbing liquid and other impurity can produce more serious interference to the quality of saltcake, and byproduct availability is not
It is high.Meanwhile the device can not avoid the enrichment problem of sodium ion in absorbing liquid, higher crystallization risk be present, need to add sun from
The problems such as subtree fat is controlled to the sodium ion in absorbing liquid system, causes system complexity to increase, and efflux wastewater amount increases.
Utility model content
Technical problem to be solved in the utility model is to overcome the shortcomings of to mention in background above technology and defect, is carried
For a kind of high, the economic and environment-friendly desulfurization absorbing liquid purifying processing device for the treatment of effeciency.
In order to solve the above technical problems, the utility model proposes technical scheme be：
A kind of desulfurization absorbing liquid purifying processing device, including lime precipitation groove, filter press, hydrofluoric acid subsider and filtering
Device, the feed end of the lime precipitation groove connect with the poor flow container on desulfurization production line, and the discharge end of lime precipitation groove connects
The feed end of the filter press is connected to, the feed end of the hydrofluoric acid subsider is connected with the drain side of the filter press, hydrogen
The discharge end of fluoric acid subsider is connected to the feed end of the filter, and the outlet end of the filter passes through circulation line and institute
Poor flow container is stated to be connected.The desulfurization absorbing liquid purifying processing device by set be sequentially connected lime precipitation groove, filter press,
Hydrofluoric acid subsider and filter, the feed end of lime precipitation groove is connected with poor flow container, the outlet end and lean solution of filter
Tank connects, desulfurization absorbing liquid in lime precipitation groove with milk of lime reaction, sedimentation, remove suspension therein, sulfate radical from
Son, fluorine ion, magnesium ion and most heavy metal ion, then filtrate enters hydrofluoric acid subsider after filter press press filtration
Interior, the calcium ion in desulfurization absorbing liquid obtains after filtering with quantitative fluorine ion reaction generation calcium fluoride precipitate, desulfurization absorbing liquid
It must regenerate, be back to poor flow container recycling.The desulfurization absorbing liquid purifying processing device is simple in construction, using conventional equipment group
Close, cost of investment is low；Moreover, the device purification efficiency is high, suspension, sulfate ion, the fluorine in absorbing liquid can be removed simultaneously
Ion, calcium ion, magnesium ion and most heavy metal ion；Using milk of lime as precipitating reagent, cost is low and will not cause
The problem of sodium ion is enriched with；Without being arranged outside waste water, environmental issue will not be increased newly.
As the further improvement to above-mentioned technical proposal：
Preferably, the feed end of the lime precipitation groove also connects a milk of lime batch tank, the lime by pipeline
Milk of lime feed pump and first flowmeter are installed on the pipeline that newborn batch tank is connected with lime precipitation groove.Pass through the milk of lime
Batch tank can conveniently configure and storage milk of lime, sets milk of lime feed pump and first flowmeter convenient into lime precipitation groove
Conveying milk of lime simultaneously counts the conveying capacity of milk of lime so that material metering is more accurate.
It is furthermore preferred that the desulfurization absorbing liquid purifying processing device also includes a control system, the control system includes
Communicated with one another the controller and host computer of connection, and online pH meter and first liquid level gauge, institute are provided with the lime precipitation groove
State input of the output end of online pH meter, first liquid level gauge and first flowmeter with the controller to electrically connect, the stone
The newborn feed pump of ash electrically connects with the output end of controller.Absorbed in this way, detecting desulfurization in lime precipitation groove by online pH meter
The pH value of liquid, the liquid level of desulfurization absorbing liquid is detected by first liquid level gauge, by controller according to liquid level and pH value meter
The amount of milk of lime required for calculating, then control milk of lime feed pump to input milk of lime into lime precipitation groove, pass through first
Flowmeter counts the input quantity of milk of lime, realizes automatically controlling for milk of lime charging, reduces hand labor intensity, and add
Material is more accurate, more saves cost.
It is furthermore preferred that the feed end of the hydrofluoric acid subsider also connects a hydrofluoric acid batch tank, the hydrogen by pipeline
Hydrofluoric acid feed pump and second flowmeter are installed on the pipeline that fluoric acid batch tank is connected with hydrofluoric acid subsider.Can be in the hydrogen fluorine
Configuration and storage hydrofluoric acid solution, by hydrofluoric acid feed pump and second flowmeter and easily molten by hydrofluoric acid in sour batch tank
Liquid is delivered in hydrofluoric acid subsider and counts its conveying capacity.
It is furthermore preferred that online calcium ion measuring instrument and second liquid level gauge are installed on the hydrofluoric acid subsider, described
Input of the output end of two flowmeters, online calcium ion measuring instrument and second liquid level gauge with the controller electrically connects, institute
Hydrofluoric acid feed pump is stated to electrically connect with the output end of controller.So, hydrofluoric acid is detected by online calcium ion measuring instrument to settle
Calcium ion concentration in groove in desulfurization absorbing liquid, the liquid level of desulfurization absorbing liquid is detected by second liquid level gauge, by controller
The amount of hydrofluoric acid solution according to required for calculating liquid level and calcium ion concentration, hydrofluoric acid feed pump is then controlled to hydrofluoric acid
Input hydrofluoric acid solution in subsider, the input quantity of hydrofluoric acid solution is counted by second flowmeter, realizes hydrofluoric acid solution
Charging automatically controls, and reduces hand labor intensity, and it is more accurate to feed, and saves cost.
Preferably, the lime precipitation groove is with being provided with the first dehvery pump and the first charging on the tank connected pipeline of lean solution
Valve, desulfurization absorbing liquid can be easily delivered to by lime precipitation groove by first dehvery pump, it is controllable by the first inlet valve
Whether desulfurization absorbing liquid processed enters in lime precipitation groove；Circulating pump and check-valves are installed on the circulation line, can will again
Raw desulfurization absorbing liquid is transmitted back to poor flow container and prevents absorbing liquid from flowing backwards.
Preferably, the second dehvery pump is installed on the pipeline that the lime precipitation groove is connected with filter press；The press filtration
The 3rd dehvery pump is installed on the pipeline that machine is connected with the hydrofluoric acid subsider；The hydrofluoric acid subsider and the filter
4th dehvery pump is installed on the pipeline of connection.In this way, convenient be delivered to material in related device.
Compared with prior art, the utility model has the advantage of：Desulfurization absorbing liquid purified treatment dress of the present utility model
Put and combined by conventional equipment, simple in construction, cost of investment is low；Desulfurization is inhaled using the desulfurization absorbing liquid purifying processing device
Suspension in absorbing liquid, sulfate ion, fluorine ion, calcium ion, magnesium ion and big absolutely can be removed simultaneously by receiving liquid and carrying out processing
Most heavy metal ion, purification efficiency is high, effect is good, the wherein removal efficiency of sulfate ion up to more than 90%, fluorine ion
Removal efficiency is up to more than 80%, and the clearance of metal ion is up to more than 99%；It is low as precipitation medicament, cost using milk of lime
It is honest and clean, and the problem of sodium ion is enriched with is not present, arranged outside no waste water, do not increase environmental issue newly；The purification of desulfurization absorbing liquid is reached
Purpose, and the recycling of desulfurization absorbing liquid is realized, replacement cycle and the operating cost of absorbing liquid are reduced, while also reduce
The cost of investment of whole desulphurization system.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are these
Some embodiments of utility model, for those of ordinary skill in the art, on the premise of not paying creative work, also
Other accompanying drawings can be obtained according to these accompanying drawings.
Fig. 1 is the structure schematic diagram of the utility model desulfurization absorbing liquid purifying processing device.
Marginal data：
1st, lime precipitation groove；2nd, filter press；3rd, hydrofluoric acid subsider；4th, filter；5th, circulation line；6th, poor flow container；
7th, the first dehvery pump；8th, the first inlet valve；9th, the second dehvery pump；10th, the 3rd dehvery pump；11st, the 4th dehvery pump；12nd, circulating pump；
13rd, check-valves；14th, milk of lime batch tank；15th, milk of lime feed pump；16th, first flowmeter；17th, hydrofluoric acid batch tank；18th, hydrogen
Fluoric acid feed pump；19th, second flowmeter；20th, online pH meter；21st, first liquid level gauge；22nd, controller；23rd, host computer；24th, exist
Line calcium ion measuring instrument；25th, second liquid level gauge.
Embodiment
For the ease of understanding the utility model, below in conjunction with Figure of description and preferred embodiment to the utility model
Work more comprehensively, meticulously describes, but the scope of protection of the utility model is not limited to embodiment in detail below.
It should be strongly noted that when a certain element, to be described as " be fixed on, be fixed in, be connected to or be communicated in " another
When on element, it can be directly fixed, affixed, connection or connect on another element or by connecting among other
Fitting is indirectly fixed, affixed, connection or connection are on another element.
Unless otherwise defined, the implication that all technical terms used hereinafter are generally understood that with those skilled in the art
It is identical.Technical term used herein is intended merely to describe the purpose of specific embodiment, is not intended to and limits this practicality
New protection domain.
Unless otherwise specified, the various raw material used in the utility model, reagent, instrument and equipment etc. can lead to
Market is crossed to be commercially available or can be prepared by existing method.
Embodiment
A kind of as shown in figure 1, embodiment of the utility model desulfurization absorbing liquid purifying processing device.The desulfurization absorbing liquid is net
Changing processing unit includes lime precipitation groove 1, filter press 2, hydrofluoric acid subsider 3 and filter 4.Wherein, lime precipitation groove 1
Feed end connected with the poor flow container 6 on desulfurization production line.The discharge end of lime precipitation groove 1 is connected to the charging of filter press 2
End.The feed end of hydrofluoric acid subsider 3 is connected with the drain side of filter press 2.The discharge end of hydrofluoric acid subsider 3 was connected to
The feed end of filter 4.The outlet end of filter 4 is connected by circulation line 5 with poor flow container 6.Lime precipitation groove 1 is used for removing
Sulfate ion, fluorine ion, magnesium ion and heavy metal ion for going in desulfurization absorbing liquid etc., and hydrofluoric acid subsider 3 is used for
Using the mutual restriction (generation calcium fluoride precipitate) of calcium and fluorine, the balance of calcium and fluorine in desulfurization absorbing liquid is maintained, desulfurization is removed and inhales
Receive calcium ion excessive in liquid.
In the present embodiment, a milk of lime batch tank 14 is also connected by pipeline in the feed end of lime precipitation groove 1, should
Milk of lime feed pump 15 and first flowmeter 16 are installed on the pipeline that milk of lime batch tank 14 is connected with lime precipitation groove 1.
The desulfurization absorbing liquid purifying processing device also includes a control system, and the control system includes the controller for the connection that communicates with one another
22 and host computer 23.Online pH meter 20 and first liquid level gauge 21 are installed on lime precipitation groove 1.The online pH meter 20,
Input of the output end of one liquid level gauge 21 and first flowmeter 16 with controller 22 electrically connects.Milk of lime feed pump 15 and control
The output end electrical connection of device 22 processed.Online pH meter 20 and first liquid level gauge 21 are used to detect desulfurization in lime precipitation groove 1 and absorbed
The pH and liquid level of liquid, controller 22 according to the pH and liquid level of absorbing liquid calculate needed for milk of lime amount and pass through lime
Newborn feed pump 15 and first flowmeter 16 quantitatively input milk of lime into lime precipitation groove 1.
In the present embodiment, a hydrofluoric acid batch tank 17, hydrogen are also connected by pipeline in the feed end of hydrofluoric acid subsider 3
Hydrofluoric acid feed pump 18 and second flowmeter 19 are installed on the pipeline that fluoric acid batch tank 17 is connected with hydrofluoric acid subsider 3.
Online calcium ion measuring instrument 24 and second liquid level gauge 25 are installed on hydrofluoric acid subsider 3.Second flowmeter 19, online calcium ion
Input of the output end of measuring instrument 24 and second liquid level gauge 25 with controller 22 electrically connects.Hydrofluoric acid feed pump 18 and control
The output end electrical connection of device 22.Online calcium ion measuring instrument 24 and second liquid level gauge 25, which are used to detect in hydrofluoric acid subsider 3, to be taken off
Calcium ion concentration and liquid level in sulphur absorbing liquid, controller 22 calculate according to calcium ion concentration in absorbing liquid and liquid level
The amount of required hydrofluoric acid solution is simultaneously quantitatively inputted by hydrofluoric acid feed pump 18 and second flowmeter 19 into hydrofluoric acid subsider 3
Hydrofluoric acid solution.
In the desulfurization absorbing liquid purifying processing device, it is provided with the pipeline that lime precipitation groove 1 is connected with poor flow container 6
First dehvery pump 7 and the first inlet valve 8.Circulating pump 12 and check-valves 13 are installed on circulation line 5.In lime precipitation groove
Second dehvery pump 9 is installed on 1 pipeline being connected with filter press 2.On the pipeline that filter press 2 is connected with hydrofluoric acid subsider 3
3rd dehvery pump 10 is installed.4th dehvery pump 11 is installed on the pipeline that hydrofluoric acid subsider 3 is connected with filter 4.
The operation principle of the desulfurization absorbing liquid purifying processing device is as follows：
The first inlet valve 8 is opened, the first dehvery pump 7 is opened and the desulfurization absorbing liquid part in poor flow container 6 is delivered to lime
In newborn subsider 1；The pH information of the desulfurization absorbing liquid in lime precipitation groove 1 is obtained by online pH meter 20, generates absorbing liquid
The absorption liquid pH signal is simultaneously sent to controller 22 by pH signals；Obtained by first liquid level gauge 21 in lime precipitation groove 1
Liquid level information, generate liquid level signal and the liquid level signal is sent to controller 22；Controller 22 is according to this
The amount of milk of lime, passes through milk of lime feed pump 15 and first flowmeter 16 needed for absorption liquid pH signal and liquid level signal of change
Milk of lime is inputted to the quantification of lime precipitation groove 1.
Milk of lime carries out hybrid reaction with the desulfurization absorbing liquid in lime precipitation groove 1, and settles, in desulfurization absorbing liquid
Sulfate ion, fluorine ion, calcium sulfate precipitation, fluorination can be generated respectively with the metal ion and heavy metal ion of alkali generation precipitation
Calcium precipitate, metal precipitates and heavy metal precipitation thing are sunken to the lower floor of lime precipitation groove 1；Then by lime precipitation groove 1
The desulfurization absorbing liquid of layer, which is delivered in filter press 2, carries out press filtration, and is cleaned for several times with demineralized water, obtains filter residue I and filtrate I, will
Gained filtrate I is delivered in hydrofluoric acid subsider 3.
The calcium ion concentration information of desulfurization absorbing liquid in hydrofluoric acid subsider 3 is obtained by online calcium ion measuring instrument 24,
The calcium ion concentration signal is simultaneously sent to controller 22 by generation calcium ion concentration signal；Hydrogen fluorine is obtained by second liquid level gauge 25
Liquid level information in acid deposition groove 3, generate liquid level signal and the liquid level signal is sent to controller 22；Control
The amount of device 22 processed hydrofluoric acid according to needed for the liquid level signal and calcium ion concentration signal of change, is then fed by hydrofluoric acid
Pump 18 and second flowmeter 19 input hydrofluoric acid solution to the quantification of hydrofluoric acid subsider 3.
Hydrofluoric acid solution and the desulfurization absorbing liquid hybrid reaction in hydrofluoric acid subsider 3, and settle, in desulfurization absorbing liquid
Calcium ion and the fluorine ion reaction generation calcium fluoride precipitate in hydrofluoric acid solution, remove the calcium ion in desulfurization absorbing liquid；Will be de-
Sulphur absorbing liquid is delivered in filter 4 by hydrofluoric acid subsider 3 and filtered, and obtains filtrate II and filter residue II, and gained is filtered
Liquid II is delivered in poor flow container 6 by circulation line 5 and reused.
Preferred embodiment of the present utility model is the foregoing is only, is not limited to the utility model, for this
For the technical staff in field, the utility model can have various modifications and variations.It is all in the spirit and principles of the utility model
Within, any modification, equivalent substitution and improvements made etc., it should be included within the scope of protection of the utility model.
Claims (7)
- A kind of 1. desulfurization absorbing liquid purifying processing device, it is characterised in that：Including lime precipitation groove (1), filter press (2), hydrogen Fluoric acid subsider (3) and filter (4), feed end and the poor flow container (6) on desulfurization production line of the lime precipitation groove (1) Connection, the discharge end of lime precipitation groove (1) are connected to the feed end of the filter press (2), the hydrofluoric acid subsider (3) Feed end is connected with the drain side of the filter press (2), and the discharge end of hydrofluoric acid subsider (3) is connected to the filter (4) feed end, the outlet end of the filter (4) are connected by circulation line (5) with the poor flow container (6).
- 2. desulfurization absorbing liquid purifying processing device according to claim 1, it is characterised in that：The lime precipitation groove (1) feed end also connects a milk of lime batch tank (14), the milk of lime batch tank (14) and lime precipitation by pipeline Milk of lime feed pump (15) and first flowmeter (16) are installed on the pipeline of groove (1) connection.
- 3. desulfurization absorbing liquid purifying processing device according to claim 2, it is characterised in that：The desulfurization absorbing liquid purification Processing unit also includes a control system, and the control system includes the controller (22) and host computer for the connection that communicates with one another (23), online pH meter (20) and first liquid level gauge (21), the online pH meter are installed on the lime precipitation groove (1) (20), input of the output end of first liquid level gauge (21) and first flowmeter (16) with the controller (22) electrically connects, The milk of lime feed pump (15) electrically connects with the output end of controller (22).
- 4. desulfurization absorbing liquid purifying processing device according to claim 3, it is characterised in that：The hydrofluoric acid subsider (3) feed end also connects a hydrofluoric acid batch tank (17) by pipeline, and the hydrofluoric acid batch tank (17) settles with hydrofluoric acid Hydrofluoric acid feed pump (18) and second flowmeter (19) are installed on the pipeline of groove (3) connection.
- 5. desulfurization absorbing liquid purifying processing device according to claim 4, it is characterised in that：The hydrofluoric acid subsider (3) online calcium ion measuring instrument (24) and second liquid level gauge (25), the second flowmeter (19), online calcium ion are installed on Input of the output end of measuring instrument (24) and second liquid level gauge (25) with the controller (22) electrically connects, the hydrofluoric acid Feed pump (18) electrically connects with the output end of controller (22).
- 6. the desulfurization absorbing liquid purifying processing device according to any one of claim 1-5, it is characterised in that：The lime The first dehvery pump (7) and the first inlet valve (8) are installed on the pipeline that newborn subsider (1) is connected with poor flow container (6)；The circulation Circulating pump (12) and check-valves (13) are installed on pipeline (5).
- 7. desulfurization absorbing liquid purifying processing device according to claim 6, it is characterised in that：The lime precipitation groove (1) the second dehvery pump (9) is installed on the pipeline being connected with filter press (2)；The filter press (2) and the hydrofluoric acid subsider (3) the 3rd dehvery pump (10) is installed on the pipeline of connection；What the hydrofluoric acid subsider (3) was connected with the filter (4) 4th dehvery pump (11) is installed on pipeline.
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| CN107055872A (en) * | 2017-05-04 | 2017-08-18 | 长沙华时捷环保科技发展股份有限公司 | A kind of desulfurization absorbing liquid purifying processing device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107055872A (en) * | 2017-05-04 | 2017-08-18 | 长沙华时捷环保科技发展股份有限公司 | A kind of desulfurization absorbing liquid purifying processing device and method |
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| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Desulfuration absorbing fluid purifying treatment device and method Effective date of registration: 20190926 Granted publication date: 20171208 Pledgee: Bank of Changsha Limited by Share Ltd. science and Technology Branch Pledgor: CHANGSHA HASKY ENVIRONMENTAL PROTECTION TECHNOLOGY DEVELOPMENT Co.,Ltd. Registration number: Y2019430000024 |
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Date of cancellation: 20201124 Granted publication date: 20171208 Pledgee: Bank of Changsha Limited by Share Ltd. science and Technology Branch Pledgor: CHANGSHA HASKY ENVIRONMENTAL PROTECTION TECHNOLOGY DEVELOPMENT Co.,Ltd. Registration number: Y2019430000024 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A desulfurization absorption liquid purification treatment device Effective date of registration: 20220623 Granted publication date: 20171208 Pledgee: Agricultural Bank of China Limited Hunan Xiangjiang New Area Branch Pledgor: CHANGSHA HASKY ENVIRONMENTAL PROTECTION TECHNOLOGY DEVELOPMENT Co.,Ltd. Registration number: Y2022430000045 |
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