CN208869369U - Acid waste water forced circulation reaction unit - Google Patents
Acid waste water forced circulation reaction unit Download PDFInfo
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- CN208869369U CN208869369U CN201821449523.4U CN201821449523U CN208869369U CN 208869369 U CN208869369 U CN 208869369U CN 201821449523 U CN201821449523 U CN 201821449523U CN 208869369 U CN208869369 U CN 208869369U
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Abstract
The acid waste water forced circulation reaction unit of the utility model, including acid waste water input unit, H2S input unit and vulcanization reaction unit, acid waste water input unit are connect with vulcanization reaction unit, H2S input unit is connect with acid waste water input unit, further includes H2S return pipe, injection suction pipe and forced circulation pipe, the both ends of forced circulation pipe are connected to vulcanization reaction unit and form circulation loop, and injection suction pipe is arranged on forced circulation pipe, H2S return pipe one end is connect with vulcanization reaction unit, the other end is connect with injection suction pipe, and forced circulation pipe input end is provided with forced circulation pump, H2It is provided with gas phase return valve on S return pipe, first pressure converter is installed on vulcanization reaction unit, first pressure converter couples with gas phase return valve signal.The utility model have the advantages that structure be simple and convenient to operate, be low in cost, reaction efficiency it is high.
Description
Technical field
The utility model relates generally to chemical process technology field more particularly to a kind of acid waste water forced circulation reaction dress
It sets.
Background technique
Non-ferrous metal metallurgy flue gas inevitably generates a large amount of acid waste water during extracting sulfuric acid, the acidity
Waste water has the characteristics that system complicated component, acid concentration high, deep-etching and high toxicity, mainly contained in component Ni, Cu, Cd,
The contents of many kinds of heavy metal ion such as Pb, As metalloid ion and the harmful substances such as dirt and halogen compound are a kind of difficult
Mining and metallurgy industrial wastewater.
It is industrial that heavy metal ion in acid waste water is smelted using vulcanization removal, i.e., by being added in oxytropism waste water
Vulcanizing agent makes in waste water the most of difference of metal ion and vulcanizing agent based on various sulfide solubility products and generates the gold of indissoluble
Belong to sulfide and precipitation and separation.For the removal rate for improving heavy metal, vulcanizing agent needs excess, usually the 1.1~1.2 of theoretical value
Times.Conventionally employed NaS, FeS etc. are used as vulcanizing agent, are limited by the conventional vulcanized dose of low factor of effective component, in recent years in industry
Begin to use H2S is as vulcanizing agent, although H2S purity may be up to 99% or more, but the H of high-purity2S is because low by technology level
Restriction, the curing efficiency of system is lower, only rests between 78%-85%, while the excessive H in part2S not with heavy metal ion
Reaction, which is directly lost, enters emission-control equipment, causes the waste of vulcanizing agent and the increase of cost of water treatment.
Utility model content
The technical problems to be solved in the utility model is to overcome the deficiencies of the prior art and provide that a kind of structure is simple, operation
The acid waste water forced circulation reaction unit convenient, low in cost, reaction efficiency is high.
In order to solve the above technical problems, the utility model uses following technical scheme:
A kind of acid waste water forced circulation reaction unit, including acid waste water input unit, H2S input unit and vulcanization are anti-
Unit is answered, the acid waste water input unit is connect with vulcanization reaction unit, the H2S input unit and acid waste water input are single
Member connection, further includes H2S return pipe, injection suction pipe and forced circulation pipe, it is anti-that the both ends of the forced circulation pipe are connected to vulcanization
Unit is answered to form circulation loop, the injection suction pipe is arranged on forced circulation pipe, the H2S return pipe one end and vulcanization reaction
Unit connection, the other end are connect with injection suction pipe, and the forced circulation pipe input end is provided with forced circulation pump, the H2S is returned
It is provided with gas phase return valve in flow tube, first pressure converter, first pressure are installed on the vulcanization reaction unit
Power converter couples with gas phase return valve signal.
As a further improvement of the above technical scheme:
The acid waste water input unit includes acid waste water input pipe, acid waste water input pipe one end and spent acidic
Water source connection, the other end and vulcanization reaction unit connect, on the acid waste water input pipe along water (flow) direction be disposed with into
Water valve, flowmeter and air and liquid mixer, the H2S input unit is connect with air and liquid mixer.
The H2S input unit includes H2S input pipe, the H2S input pipe one end and H2The connection of the source S, the other end and gas-liquid
Mixer connection, the H2Intake valve, surge tank, air entraining valve and check (non-return) valve, institute are disposed with along airflow direction on S input pipe
Surge tank is stated equipped with second pressure converter, the intake valve couples with second pressure converter signal, the vulcanization reaction
Unit is equipped with ORP pick-up group, and the air entraining valve couples with ORP pick-up group signal.
The ORP pick-up group includes ORP transmitter and the scene ORP table, is both installed on vulcanization reaction unit, described
ORP transmitter couples with aerating valve signal.
The surge tank is equipped with the first waste pipe and bursting tube, and the bursting tube connect with the first waste pipe, and described the
The first waste valve and safety valve are arranged on one waste pipe and bursting tube.
The vulcanization reaction unit includes vulcanization reaction tank and the blender for extending to its inner cavity, is set on the vulcanization reaction tank
It is equipped with drainpipe, the drainpipe branches into qualified waterpipe in end and do not conform to waterpipe, qualified waterpipe and does not conform to water pipe
Road is provided with drain valve, is provided with and shows on trial on the drainpipe, and the ORP transmitter and the scene ORP table are installed in drainpipe
On, the acid waste water input pipe, H2S return pipe is connected with forced circulation Guan Junyu vulcanization reaction tank.
Vulcanization reaction tank inner cavity and drainpipe entrance location are equipped with gas-liquid isolation board.
The vulcanization reaction tank top is installed with the second waste pipe, is provided with the second waste valve on second waste pipe,
The vulcanization reaction pot bottom, which is installed with, to be emptied pipe and the dirt discharging valve emptied on pipe is arranged in, and is also installed with liquid on vulcanization reaction tank
Position converter.
A kind of acid waste water forced circulation reaction method is carried out with above-mentioned acid waste water forced circulation reaction unit, packet
Include following steps:
S1: closing and empty pipe, opens inlet valve and does not conform to the drain valve on waterpipe, passes through the aperture control of regulating water inlet valve
The numerical value of flowmeter processed is shown in the numerical value of liquid level converter in the range of normergic state；
S2: closing the first waste valve, checks that safety valve is at normal condition, opens intake valve and passes through second pressure
The value of feedback of converter automatically controls the opening and closing of intake valve；
S3: starting blender is at working condition；
S4: when observing acid waste water overflow by showing on trial, opening air entraining valve makes the value of ORP transmitter be in -100 mv
To between 100mv；
S5: closing the second waste valve, and starting has forced circulation pump, when the value of ORP transmitter is stablized in control range,
Air entraining valve is set as 0mv and automatically controls the opening and closing of air entraining valve by the value of feedback of ORP transmitter, opens qualified waterpipe
On drain valve, close and do not conform to drain valve on waterpipe；
S6: opening gas phase return valve and automatically controls gas phase return valve by first pressure converter value of feedback
Opening and closing.
Compared with the prior art, the advantages of the utility model are:
The acid waste water forced circulation reaction unit of the utility model, when operation, acid waste water is inputted single by acid waste water
Member is sent into, while H2S input unit is by H2S be sent into acid waste water input unit mix it is latter with sending to vulcanization reaction unit
It is reacted, excessive H2S is by H2S return pipe is back to injection suction pipe, since forced circulation pump is again by vulcanization reaction unit liquid phase
Extraction is forced to form pressure to injection suction pipe from the conveying of forced circulation pipe, so that excessive H2S is pressurized final from forced circulation pipe
It is back to vulcanization reaction unit and carries out circular response, realized back by the joint control of first pressure converter and gas phase return valve
The automatic control of flow.The device is easy to operate, power cost is low, occupied area is small, with low investment；Utilize the device, reaction
Residence time is short, and reaction efficiency is high, H2The automatic adjustment of S regurgitant volume.Simultaneously because to excessive H from technique2S has been innovated back
With, significantly reduce enterprise disposition acid waste water environmentally friendly cost.The acid waste water forced circulation reaction method of the utility model,
It is carried out with above-mentioned acid waste water forced circulation reaction unit, therefore it is corresponding to have above-mentioned acid waste water forced circulation reaction unit
Technical effect, meanwhile, value that ORP transmitter measures automatically controls the opening and closing of air entraining valve, to guarantee H2S additional amount can be with acid
The variation of property heavy metal ions in wastewater content and automatically adjust, ensure that the controllability of effluent index.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model acid waste water forced circulation reaction unit.
Each label indicates in figure:
1, acid waste water input unit；11, acid waste water input pipe；12, inlet valve；13, flowmeter；14, gas-liquid mixed
Device；2,H2S input unit；21,H2S input pipe；22, intake valve；23, surge tank；24, air entraining valve；25, second pressure converter；
26, ORP pick-up group；261, ORP transmitter；262, the scene ORP table；27, the first waste pipe；271, the first waste valve；28, safety
Pipe；281, safety valve；29, check (non-return) valve；3, vulcanization reaction unit；31, vulcanization reaction tank；32, blender；33, drainpipe；331,
Qualified waterpipe；332, waterpipe is not conformed to；333, drain valve；334, it shows on trial；34, gas-liquid isolation board；35, the second waste pipe；
351, the second waste valve；36, pipe is emptied；361, dirt discharging valve；37, liquid level converter；4,H2S return pipe；5, suction pipe is sprayed；6, strong
Circulation pipe processed；7, forced circulation pump；8, gas phase return valve；9, first pressure converter.
Specific embodiment
The utility model is described in further details below with reference to Figure of description and specific embodiment.
As shown in Figure 1, a kind of embodiment of the utility model acid waste water forced circulation reaction unit, including acid waste water
Input unit 1, H2S input unit 2 and vulcanization reaction unit 3, acid waste water input unit 1 are connect with vulcanization reaction unit 3, H2S
Input unit 2 is connect with acid waste water input unit 1, further includes H2S return pipe 4, injection suction pipe 5 and forced circulation pipe 6, are forced
The both ends of circulation pipe 6 are connected to vulcanization reaction unit 3 and form circulation loop, and injection suction pipe 5 is arranged on forced circulation pipe 6, H2S
4 one end of return pipe is connect with vulcanization reaction unit 3, the other end is connect with injection suction pipe 5, and 6 input end of forced circulation pipe is provided with
Forced circulation pump 7, H2It is provided with gas phase return valve 8 on S return pipe 4, is installed with first pressure on vulcanization reaction unit 3 and send
Become device 9, first pressure converter 9 couples with 8 signal of gas phase return valve.When the device is run, acid waste water is by spent acidic
Water input unit 1 is sent into, while H2S input unit 2 is by H2S be sent into acid waste water input unit 1 mix it is latter with sending to sulphur
Change reaction member 3 to be reacted, excessive H2S is by H2S return pipe 4 is back to injection suction pipe 5, since forced circulation pump 7 is again by sulphur
Changing 3 liquid phase of reaction member forces extraction to form pressure to injection suction pipe 5 from the conveying of forced circulation pipe 6, so that excessive H2S is pressurized
Vulcanization reaction unit 3 is finally back to from forced circulation pipe 6 and carries out circular response, is returned by first pressure converter 9 and gas phase
The joint control for flowing regulating valve 8 realizes the automatic control of regurgitant volume.The device is easy to operate, power cost is low, occupied area is small, investment
It saves；Using the device, reaction time is short, and reaction efficiency is high, H2The automatic adjustment of S regurgitant volume.Simultaneously because from technique
To excessive H2S has carried out innovation reuse, significantly reduces the environmentally friendly cost of enterprise's disposition acid waste water.
In the present embodiment, acid waste water input unit 1 includes acid waste water input pipe 11,11 one end of acid waste water input pipe
It connect with spent acidic water source, the connection of the other end and vulcanization reaction unit 3, is successively set on acid waste water input pipe 11 along water (flow) direction
It is equipped with inlet valve 12, flowmeter 13 and air and liquid mixer 14, H2S input unit 2 is connect with air and liquid mixer 14.In the structure,
Acid waste water is sent by acid waste water input pipe 11, H2S is mixed after being sent into air and liquid mixer 14, passes through regulating water inlet valve 12
Aperture controls the numerical value of flowmeter 13, to guarantee the controllability of feeding amount.
In the present embodiment, H2S input unit 2 includes H2S input pipe 21, this H221 one end of S input pipe and H2The connection of the source S,
The other end is connect with air and liquid mixer 14, H2On S input pipe 21 along airflow direction be disposed with intake valve 22, surge tank 23,
Air entraining valve 24 and check (non-return) valve 29, surge tank 23 are equipped with second pressure converter 25, intake valve 22 and second pressure converter 25
Signal connection, vulcanization reaction unit 3 are equipped with ORP pick-up group 26, and air entraining valve 24 couples with 26 signal of ORP pick-up group.The structure
In, H2S is by H2S input pipe 21 first send to surge tank 23 to be buffered and be sent again to air and liquid mixer 14, passes through second pressure converter
The pressure value of 25 surge tanks 23 measured passes through ORP to control the opening and closing of intake valve 22 to guarantee the safe internal pressure of surge tank 23
The value that pick-up group 26 measures automatically controls the opening and closing of air entraining valve 24, to guarantee H2S additional amount can with heavy metal in acid waste water from
The variation of sub- content and automatically adjust, ensure that the controllability of effluent index.
In the present embodiment, ORP pick-up group 26 includes ORP transmitter 261 and the scene ORP table 262, is both installed in vulcanization
On reaction member 3, ORP transmitter 261 couples with 24 signal of air entraining valve.ORP transmitter 261 is mainly used for and 24 joint control of air entraining valve
Realize H2The automatic adjustment of S additional amount, the scene ORP table 262 are mainly used for operator scene and read its numerical value.
In the present embodiment, surge tank 23 is equipped with the first waste pipe 27 and bursting tube 28, bursting tube 28 and the first waste pipe
27 connect, and are arranged with the first waste valve 271 and safety valve 281 on the first waste pipe 27 and bursting tube 28.First waste pipe 27
The emptying of surge tank 23 is used for the setting of the first waste valve 271；And bursting tube 28 and safety valve 281 then ensure that overall structure
Safety.
In the present embodiment, vulcanization reaction unit 3 includes vulcanization reaction tank 31 and the blender 32 for extending to its inner cavity, and vulcanization is anti-
It answers and is provided with drainpipe 33 on tank 31, drainpipe 33 branches into qualified waterpipe 331 in end and do not conform to waterpipe 332, qualified
Waterpipe 331 and do not conform to waterpipe 332 and be provided with drain valve 333,334, ORP transmitter of showing on trial is provided on drainpipe 33
The scene 261 and ORP table 262 is installed on drainpipe 33, acid waste water input pipe 11, H2S return pipe 4 and forced circulation pipe 6 are equal
It is connect with vulcanization reaction tank 31.Discharge of the setting of drainpipe 33 and drain valve 333 for water after reacting, before the reaction the phase, leads to
It crosses and does not conform to the discharge of waterpipe 332, reaction is then discharged by qualified waterpipe 331 when reaching effluent index.
In the present embodiment, 31 inner cavity of vulcanization reaction tank and 33 entrance location of drainpipe are equipped with gas-liquid isolation board 34.The gas
Liquid isolation board 34 be set as right angle spacer its to be mounted in vulcanization reaction tank 31 be only lower ending opening, extend under liquid level, i.e.,
Gas phase and liquid phase are kept apart, prevents gas phase to be discharged from drainpipe 33, further improves the reclamation rate of gas phase.
In the present embodiment, it is installed with the second waste pipe 35 at the top of vulcanization reaction tank 31, is provided on the second waste pipe 35
Two waste valves 351,31 bottom of vulcanization reaction tank, which is installed with, to be emptied pipe 36 and the dirt discharging valve 361 emptied on pipe 36 is arranged in, and is vulcanized
Liquid level converter 37 is also installed in reactor tank 31.Second waste pipe 35 and the second waste valve 351 are used for the emptying of gas,
Converge latter same discharge with the first waste pipe 27, the setting of the emptying pipe 36 and dirt discharging valve 361 is for liquid in vulcanization reaction tank 31
The emptying of body, liquid level converter 37 are used to feed back the liquid level of vulcanization reaction tank 31, and the numerical value of liquid level converter 37 is shown in normally
When in the range of reactiveness, inlet valve 12 is closed.
A kind of acid waste water forced circulation reaction method is carried out with above-mentioned acid waste water forced circulation reaction unit, packet
Include following steps:
S1: closing and empty pipe 36, opens inlet valve 12 and does not conform to the drain valve 333 on waterpipe 332, is intake by adjusting
The numerical value of the aperture control flowmeter 13 of valve 12, is shown in the numerical value of liquid level converter 37 in the range of normergic state；
S2: closing the first waste valve 271, checks that safety valve 281 is at normal condition, opens intake valve 22 and passes through
The value of feedback of second pressure converter 25 automatically controls the opening and closing of intake valve 22；
S3: starting blender 32 is at working condition；
S4: by show on trial 334 observe acid waste water overflow when, open air entraining valve 24 make at the value of ORP transmitter 261
In -100 mv between 100mv；
S5: closing the second waste valve 351, and starting has forced circulation pump 7, and the value to ORP transmitter 261 is in control range
When stablizing, air entraining valve 24 is set as 0mv and automatically controls the opening and closing of air entraining valve 24 by the value of feedback of ORP transmitter 261,
It opens the drain valve 333 on qualified waterpipe 331, close the drain valve 333 not conformed on waterpipe 332；
S6: opening gas phase return valve 8 and automatically controls gas phase reflux adjusting by 9 value of feedback of first pressure converter
The opening and closing of valve 8.
Using this method, acid waste water is sent by acid waste water input unit 1, while H2S input unit 2 is by H2S is sent into acid
Property waste water input unit 1 mix it is latter reacted with sending to vulcanization reaction unit 3, excessive H2S is by H2S return pipe 4 returns
It is flow to injection suction pipe 5, since vulcanization reaction unit 3 is had liquid phase that extraction is forced to convey from forced circulation pipe 6 by forced circulation pump 7 again
Pressure is formed to injection suction pipe 5, so that excessive H2S, which is pressurized, is finally back to the progress of vulcanization reaction unit 3 from forced circulation pipe 6
Circular response realizes that reflux most automatically controls by the joint control of first pressure converter 9 and gas phase return valve 8.The device
It is easy to operate, power cost is low, occupied area is small, with low investment；Using the device, reaction time is short, and reaction efficiency is high,
H2The automatic adjustment of S regurgitant volume.The opening and closing of air entraining valve 24 is automatically controlled, by the value that ORP transmitter 261 measures to guarantee H2S is added
Amount can be automatically adjusted with the variation of heavy metal ion content in acid waste water, ensure that the controllability of effluent index.While by
In from technique to excessive H2S has carried out innovation reuse, significantly reduces the environmentally friendly cost of enterprise's disposition acid waste water.
Although the utility model is disclosed as above with preferred embodiment, it is not intended to limit the utility model.It is any
Those skilled in the art, in the case where not departing from technical solutions of the utility model range, all using the disclosure above
Technology contents many possible changes and modifications are made to technical solutions of the utility model, or be revised as the equivalent of equivalent variations
Embodiment.Therefore, all contents without departing from technical solutions of the utility model, according to the utility model technical spirit to the above reality
Any simple modifications, equivalents, and modifications that example is done are applied, should all be fallen in the range of technical solutions of the utility model protection.
Claims (8)
1. a kind of acid waste water forced circulation reaction unit, including acid waste water input unit (1), H2S input unit (2) and sulphur
Change reaction member (3), the acid waste water input unit (1) connect with vulcanization reaction unit (3), the H2S input unit (2)
It is connect with acid waste water input unit (1), it is characterised in that: further include H2S return pipe (4), injection suction pipe (5) and forced circulation
It manages (6), the both ends of the forced circulation pipe (6) are connected to vulcanization reaction unit (3) and form circulation loop, the injection suction pipe
(5) it is arranged on forced circulation pipe (6), the H2S return pipe (4) one end connect with vulcanization reaction unit (3), the other end and spray
Injecting tube (5) connection, forced circulation pipe (6) input end are provided with forced circulation pump (7), the H2S return pipe is set on (4)
It is equipped with gas phase return valve (8), is installed with first pressure converter (9) on the vulcanization reaction unit (3), first pressure
Power converter (9) couples with gas phase return valve (8) signal.
2. acid waste water forced circulation reaction unit according to claim 1, it is characterised in that: the acid waste water input
Unit (1) includes acid waste water input pipe (11), and described acid waste water input pipe (11) one end connect with spent acidic water source, is another
End is connect with vulcanization reaction unit (3), is disposed with inlet valve along water (flow) direction on the acid waste water input pipe (11)
(12), flowmeter (13) and air and liquid mixer (14), the H2S input unit (2) is connect with air and liquid mixer (14).
3. acid waste water forced circulation reaction unit according to claim 2, it is characterised in that: the H2S input unit
It (2) include H2S input pipe (21), this H2S input pipe (21) one end and H2The connection of the source S, the other end and air and liquid mixer (14) are even
It connects, the H2On S input pipe (21) along airflow direction be disposed with intake valve (22), surge tank (23), air entraining valve (24) and
Check (non-return) valve (29), the surge tank (23) are equipped with second pressure converter (25), and the intake valve (22) is sent with second pressure
Become the connection of device (25) signal, the vulcanization reaction unit (3) is equipped with ORP pick-up group (26), and the air entraining valve (24) and ORP become
Group (26) signal is sent to couple.
4. acid waste water forced circulation reaction unit according to claim 3, it is characterised in that: the ORP pick-up group
(26) include ORP transmitter (261) and the scene ORP table (262), be both installed on vulcanization reaction unit (3), the ORP
Transmitter (261) couples with air entraining valve (24) signal.
5. acid waste water forced circulation reaction unit according to claim 4, it is characterised in that: on the surge tank (23)
Equipped with the first waste pipe (27) and bursting tube (28), the bursting tube (28) connect with the first waste pipe (27), the first row
The first waste valve (271) and safety valve (281) are arranged on useless pipe (27) and bursting tube (28).
6. acid waste water forced circulation reaction unit according to claim 5, it is characterised in that: the vulcanization reaction unit
(3) include vulcanization reaction tank (31) and the blender (32) for extending to its inner cavity, be provided with draining on the vulcanization reaction tank (31)
It manages (33), the drainpipe (33) branches into qualified waterpipe (331) in end and do not conform to waterpipe (332), qualified waterpipe
(331) and do not conform to waterpipe (332) and be provided with drain valve (333), be provided with show on trial (334) on the drainpipe (33), institute
It states ORP transmitter (261) and the scene ORP table (262) is installed on drainpipe (33), the acid waste water input pipe (11), H2S
Return pipe (4) and forced circulation pipe (6) are connect with vulcanization reaction tank (31).
7. acid waste water forced circulation reaction unit according to claim 6, it is characterised in that: the vulcanization reaction tank
(31) inner cavity and drainpipe (33) entrance location are equipped with gas-liquid isolation board (34).
8. acid waste water forced circulation reaction unit according to claim 7, it is characterised in that: the vulcanization reaction tank
(31) top is installed with the second waste pipe (35), is provided with the second waste valve (351), the sulphur on second waste pipe (35)
Change reactor tank (31) bottom and is installed with the dirt discharging valve (361) for emptying pipe (36) and setting on emptying pipe (36), vulcanization reaction tank
(31) liquid level converter (37) are also installed on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821449523.4U CN208869369U (en) | 2018-09-05 | 2018-09-05 | Acid waste water forced circulation reaction unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821449523.4U CN208869369U (en) | 2018-09-05 | 2018-09-05 | Acid waste water forced circulation reaction unit |
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| Publication Number | Publication Date |
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| CN208869369U true CN208869369U (en) | 2019-05-17 |
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ID=66466865
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| CN201821449523.4U Active CN208869369U (en) | 2018-09-05 | 2018-09-05 | Acid waste water forced circulation reaction unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108911097A (en) * | 2018-09-05 | 2018-11-30 | 长沙华时捷环保科技发展股份有限公司 | A kind of acid waste water forced circulation reaction unit and method |
-
2018
- 2018-09-05 CN CN201821449523.4U patent/CN208869369U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108911097A (en) * | 2018-09-05 | 2018-11-30 | 长沙华时捷环保科技发展股份有限公司 | A kind of acid waste water forced circulation reaction unit and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Forced circulation reaction device for acid wastewater Effective date of registration: 20220623 Granted publication date: 20190517 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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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230905 Granted publication date: 20190517 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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| PC01 | Cancellation of the registration of the contract for pledge of patent right |