CN205313162U - Desulfurized seawater water quality recover device - Google Patents
Desulfurized seawater water quality recover device Download PDFInfo
- Publication number
- CN205313162U CN205313162U CN201521013058.6U CN201521013058U CN205313162U CN 205313162 U CN205313162 U CN 205313162U CN 201521013058 U CN201521013058 U CN 201521013058U CN 205313162 U CN205313162 U CN 205313162U
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- China
- Prior art keywords
- valve
- aeration tank
- absorption tower
- exhaust pipeline
- alkali liquor
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- 239000013535 sea water Substances 0.000 title claims abstract description 58
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 238000005273 aeration Methods 0.000 claims abstract description 64
- 238000010521 absorption reaction Methods 0.000 claims abstract description 45
- 239000003513 alkali Substances 0.000 claims description 35
- 239000000945 filler Substances 0.000 claims description 16
- 238000011084 recovery Methods 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims 3
- 239000007789 gas Substances 0.000 abstract description 45
- 238000006477 desulfuration reaction Methods 0.000 abstract description 13
- 230000023556 desulfurization Effects 0.000 abstract description 13
- 239000003546 flue gas Substances 0.000 abstract description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000003518 caustics Substances 0.000 abstract 1
- 238000003795 desorption Methods 0.000 abstract 1
- 239000003595 mist Substances 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 13
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- 230000008569 process Effects 0.000 description 8
- 230000009471 action Effects 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- 230000002378 acidificating effect Effects 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000006386 neutralization reaction Methods 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- -1 hydrogen ions Chemical class 0.000 description 2
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 239000008267 milk Substances 0.000 description 2
- 210000004080 milk Anatomy 0.000 description 2
- 235000013336 milk Nutrition 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model relates to a desulfurized seawater water quality recover device belongs to that environmental water handles the field among the flue gas sea water desulfurization system. A desulfurized seawater water quality recover device, includes: the equalizing basin, closed aeration tank, just the inside aeration equipment that is equipped with in closed aeration tank, closed aeration tank top is equipped with gas vent A, the air -blower, the SO2 detector is located behind the gas vent A, still be equipped with valve B and valve C behind the gas vent A: still be equipped with absorption tower and caustic circulation pumps, automatic control device behind the valve C. SO2 concentration in the exhaust mist of closed aeration tank can be monitored to the device, can realize handling exhaust gas's SO2 desorption through automatic control device simultaneously, ensures among the exhaust gas that SO2 can discharge to reach standard, can effectively avoid secondary pollution.
Description
Technical Field
The utility model relates to a desulfurization sea water quality of water recovery device belongs to environmental water treatment field among flue gas sea water desulfurization system.
Background
Coal-fired power generation is a technically mature and reliable energy source, and is dominant in energy structures in China for a long time. Besides coal-fired power plants, there are also a large number of industrial coal-fired boilers, ship-powered coal-fired boilers and the like, and the coal-fired boilers generate a large amount of SO in operation2In order to prevent SO in the flue gas2Pollutes the environment and must take corresponding treatment measures. The seawater desulfurization process does not need to consume fresh water and an absorbent additionally, does not contain byproducts and wastes, is simple in process and convenient to maintain, saves investment and operating cost, and has a plurality of advantages, so that the seawater desulfurization process is more applied to gas treatment of coal-fired power plants and ship boilers.
The seawater desulfurization process is to absorb SO in flue gas by using alkalescence (pH is 7.4-8.8) of natural seawater2The wet flue gas desulfurization process, seawater absorbed SO2Sulfate, which is one of the main components in seawater, is finally generated, SO2The absorption of (b) has little effect on the seawater. The process mainly comprises two steps of chemical reactions: SO (SO)2Is absorbed by seawater and converted into SO3 2-Then aerating SO3 2-By oxidation to form stable SO4 2-Absorption of SO2Post-generated acidBy CO as a sex hydrogen ion3 2-And HCO3 -Neutralization and CO production2The gas, in order to make the pH value of the effluent reach the relevant discharge standard (pH is more than or equal to 6.8), is generally treated by means of air aeration of the desulfurized seawater, on the one hand, SO is introduced by oxygen in the air3 2-By oxidation to form stable SO4 2-On the other hand, CO in seawater is blown off by air2Overflow, eventually promoting recovery of seawater pH.
Due to oxygen to SO at low pH3 2-The oxidation rate is very low and therefore a proportion of seawater (from the cooling water) is typically blended into the desulphurised seawater before entering the aeration tank to increase the initial pH of the seawater in the aeration tank, which results in the disadvantages of large air demand, high energy consumption and large floor space. In order to save cost, the initial pH value in the aeration tank is generally controlled to be 3-5, and because the initial pH value in the aeration tank is low, a large amount of aeration easily causes SO in the desulfurized seawater2Overflow, causing secondary pollution.
Therefore, the SO in the aeration tank is avoided2The secondary pollution caused by the overflow is necessary to develop a novel treatment process which is more economical and environment-friendly.
SUMMERY OF THE UTILITY MODEL
For solving the problem of SO existing in the traditional aeration process2Overflow problem, an object of the present invention is to provide a method for preventing SO2A desulfurized seawater quality restoration device causing secondary pollution.
The utility model aims at realizing through the following technical scheme:
a desulfurized seawater quality recovery device comprising:
a regulating tank;
one end of the closed aeration tank is connected with the adjusting tank, and an aeration device is arranged in the closed aeration tank; an air outlet A is arranged above the closed aeration tank, and the air outlet A (6) is connected with an air exhaust pipeline A;
the air blower is arranged outside the closed aeration tank, one end of the air blower is connected with the aeration device, and the other end of the air blower is connected with an air filter;
SO2a detector arranged on the exhaust pipeline A for detecting SO2Concentration;
wherein,
an exhaust pipeline B and an exhaust pipeline C are respectively connected with the exhaust pipeline A, a valve B is arranged on the exhaust pipeline B, and a valve C is arranged on the exhaust pipeline C;
the desulfurized seawater quality of water recovery device still includes:
the bottom end of the absorption tower is connected with the exhaust pipeline C behind the valve C; the absorption tower is internally provided with an air distributor, a supporting layer, a filler and a water distribution nozzle from bottom to top in sequence, and the top of the absorption tower is provided with an exhaust port B;
the alkali liquor circulating pump is arranged at the bottom of the outer side of the absorption tower, one end of the alkali liquor circulating pump is connected with the bottom of the outer side of the absorption tower, and the other end of the alkali liquor circulating pump is connected with the water distribution nozzle;
automatic control devices respectively connected to the SOs2A detector, a valve B, a valve C and an alkali liquor circulating pump according to the SO2And the opening and closing of the valve B, the valve C and the alkali liquor circulating pump are controlled by the detection result of the detector.
Further, the aeration device is arranged at the bottom end inside the closed aeration tank.
Further, the aeration device is arranged at the top end inside the closed aeration tank.
Further, the filler is a porous filler.
Furthermore, an atomizing nozzle is arranged on the inner wall of the absorption tower and between the distribution nozzle and the filler.
A method for restoring the quality of a desulfurized seawater by using the apparatus for restoring the quality of a desulfurized seawater according to any one of the preceding claims, comprising the steps of:
step 1, introducing desulfurized seawater and cooling seawater into an adjusting tank, uniformly mixing to obtain mixed desulfurized seawater, and adjusting the pH value of the mixed desulfurized seawater to 3-5;
step 2, introducing the mixed desulfurized seawater into a closed aeration tank, wherein an aeration device is arranged in the closed aeration tank;
step 3, filtering air by an air filter, then feeding the air into an air blower, and uniformly blowing the air into the mixed desulfurization seawater by the aeration device under the action of the air blower;
step 4, under the oxidation action of oxygen in the mixed desulfurization seawater, SO in the mixed desulfurization seawater2Conversion to SO4 2-And generates acidic hydrogen ions; the acidic hydrogen ion is CO3 2-And HCO3 -Neutralization and CO production2A gas; CO 22Gas, air and unconverted SO2Overflowing the mixed desulfurized seawater to form mixed gas, and recovering the pH value of the mixed desulfurized seawater to be more than 6.8 to reach the discharge standard;
meanwhile, the mixed gas generated by the closed aeration tank enters the exhaust pipeline A through the exhaust port A and passes through the SO2Detection and analysis of the detector:
when SO in the mixed gas2When the concentration exceeds the discharge standard, opening a valve C and closing a valve B according to the control of the automatic control device, enabling the mixed gas to enter the absorption tower, and enabling the mixed gas to uniformly enter a filler through a gas distributor; simultaneously, the alkali liquor circulating pump is opened, and alkali liquor absorption liquid is uniformly sprayed in the filler through the water distribution nozzle under the action of the alkali liquor circulating pump, so that the mixture is obtainedSO in the gas2Absorbed and finally the mixed gas is discharged from a gas outlet B of the absorption tower;
when SO in the mixed gas2When the concentration reaches the discharge standard, opening the valve B, closing the valve C and the alkali liquor circulating pump according to the control of the automatic control device, and directly discharging the mixed gas into the atmosphere through the exhaust pipeline B.
Further, the alkali liquor absorption liquid is a sodium hydroxide solution, lime milk or a sodium carbonate solution, and preferably, the alkali liquor absorption liquid is a sodium hydroxide solution with the mass concentration of 1-20%.
Further, when the pH value of the alkali liquor absorption liquid reaches 7-8, the alkali liquor absorption liquid is replaced with new alkali liquor absorption liquid.
Compared with the traditional open type air aeration process, the method of the utility model has the following advantages:
in the device, the air inlet of the air blower is connected with the air filter, so that impurities in the air can be prevented from blocking the aeration head of the aeration device. The device can monitor SO in the mixed gas discharged by the closed aeration tank2Concentration, and simultaneously the SO of the exhaust gas can be realized through an automatic control device2Removing SO in the exhaust gas2Can reach the standard and discharge, and can effectively avoid secondary pollution. Furthermore, SO is in the exhaust gas2When the discharge reaches the standard, the absorption tower can be automatically closed through the automatic control device, so that the operation cost of the whole system is saved.
Drawings
FIG. 1 is a schematic structural view of a desulfurized seawater quality recovery device of the present invention;
wherein, 1-regulating tank, 2-closed aeration tank, 3-air filter, 4-blower, 5-aeration device, 6-exhaust port A, 7-SO2Instrumentation, 8-valvesA door B, 9-a valve C, 10-an absorption tower, 11-an air distributor, 12-a supporting layer, 13-a filler, 14-an exhaust port B, 15-an alkali liquor circulating pump, 16-a water distribution nozzle, 17-an exhaust pipeline A, 18-an exhaust pipeline B, 19-an exhaust pipeline C.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
A desulfurized seawater quality recovery device is characterized by comprising:
a regulating tank 1;
the aeration device 5 can be arranged at the bottom end in the closed aeration tank 2 or at the top end in the closed aeration tank 2. One end of the closed aeration tank 2 is connected with the adjusting tank 1, and an aeration device 5 is arranged in the closed aeration tank 2; an air outlet A6 is arranged above the closed aeration tank 2, and the air outlet A6 is connected with an air exhaust pipeline A17;
a blower 4 which is arranged outside the closed aeration tank 2, wherein one end of the blower 4 is connected with the aeration device 5, and the other end is connected with an air filter 3;
SO2the detector 7 is arranged on the exhaust pipeline A17 and is used for detecting SO2Concentration;
wherein,
an exhaust pipeline B18 and an exhaust pipeline C19 are respectively connected with the exhaust pipeline A17, a valve B8 is arranged on the exhaust pipeline B18, and a valve C9 is arranged on the exhaust pipeline C19;
the desulfurized seawater quality of water recovery device still includes:
the bottom end of the absorption tower 10 is connected with the exhaust pipeline C19 after the valve C9; the absorption tower 10 is internally provided with an air distributor 11, a supporting layer 12, a filler 13 and a water distribution nozzle 16 in sequence from bottom to top, and the top of the absorption tower 10 is provided with an air outlet B14; the filler is porous filler.
The alkali liquor circulating pump 15 is arranged at the bottom of the outer side of the absorption tower 10, one end of the alkali liquor circulating pump 15 is connected with the bottom of the outer side of the absorption tower 10, and the other end of the alkali liquor circulating pump 15 is connected with the water distribution nozzle 16;
automatic control devices respectively connected to the SOs2A detector 7, a valve B8, a valve C9 and an alkali liquor circulating pump 15 according to the SO2The detection result of the detector 7 controls the opening and closing of the valve B8, the valve C9 and the alkali liquor circulating pump 15.
Wherein, on the inner wall of the absorption tower, an atomizing nozzle is arranged between the distribution nozzle 16 and the filler 13, so that the mixed gas is fully contacted with and absorbed by the alkali liquor absorption liquid.
A method for restoring the quality of a desulfurized seawater by using the apparatus for restoring the quality of a desulfurized seawater according to any one of the preceding claims, comprising the steps of:
step 1, introducing desulfurized seawater and cooling seawater into an adjusting tank, uniformly mixing to obtain mixed desulfurized seawater, and adjusting the pH value of the mixed desulfurized seawater to 3-5;
step 2, introducing the mixed desulfurized seawater into a closed aeration tank, wherein an aeration device is arranged in the closed aeration tank;
step 3, filtering air by an air filter, then feeding the air into an air blower, and uniformly blowing the air into the mixed desulfurization seawater by the aeration device under the action of the air blower;
step 4, under the oxidation action of oxygen in the mixed desulfurization seawater, SO in the mixed desulfurization seawater2Conversion to SO4 2-And generates acidic hydrogen ions; the acidic hydrogen ion is CO3 2-And HCO3 -Neutralization and CO production2A gas; CO 22Gas, air and unconverted SO2Overflowing the mixed desulfurized seawater to form mixed gas, and recovering the pH value of the mixed desulfurized seawater to be more than 6.8 to reach the discharge standard;
meanwhile, the mixed gas generated by the closed aeration tank enters the exhaust pipeline A through the exhaust port A and passes through the SO2Detection and analysis of the detector:
when SO in the mixed gas2When the concentration exceeds the discharge standard, opening a valve C and closing a valve B according to the control of the automatic control device, enabling the mixed gas to enter the absorption tower, and enabling the mixed gas to uniformly enter a filler through a gas distributor; and simultaneously turning on the alkali liquor circulating pump, and uniformly spraying alkali liquor absorption liquid into the filler through the water distribution nozzle under the action of the alkali liquor circulating pump, wherein due to the existence of the filler, the contact area and the contact time of the mixed gas and the absorption liquid on the surface of the filler are greatly increased, SO that SO in the mixed gas2Absorbed and finally the mixed gas is discharged from a gas outlet B of the absorption tower;
when SO in the mixed gas2When the concentration reaches the discharge standard, opening the valve B, closing the valve C and the alkali liquor circulating pump according to the control of the automatic control device, and directly discharging the mixed gas into the atmosphere through the exhaust pipeline B.
Wherein the alkali liquor absorption liquid can be a sodium hydroxide solution, lime milk or a sodium carbonate solution, and is preferably a sodium hydroxide solution with the mass concentration of 1-20%. And when the pH value of the alkali liquor absorption liquid reaches 7-8, replacing the alkali liquor absorption liquid with new alkali liquor absorption liquid to ensure the absorption efficiency.
The utility model designs the traditional open aeration tank into a closed aeration tank, and is additionally provided with SO2An absorption tower, wherein SO is arranged at the air outlet of the aeration tank2The on-line monitoring device is used for monitoring the equipment,by SO2The online monitoring data is fed back to the automatic control system, if the gas SO escapes from the aeration tank2If the standard exceeds the standard, the gas escaping from the aeration tank is discharged to spare SO through valve conversion2Absorption tower in which SO is released from the gas2Absorbed by the alkali liquor absorption liquid, thereby avoiding SO in the overflowed gas2Polluting the air. If SO is in the escaping gas2And if the standard is reached, the gas is directly discharged into the atmosphere. The utility model discloses in adopt closed aeration tank and supplementary absorption tower to combine together, can effectively prevent SO2Escape to avoid secondary pollution.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A desulfurized seawater quality recovery device is characterized by comprising:
a regulating reservoir (1);
one end of the closed aeration tank (2) is connected with the adjusting tank (1), and an aeration device (5) is arranged in the closed aeration tank (2); an exhaust port A (6) is arranged above the closed aeration tank (2), and the exhaust port A (6) is connected with an exhaust pipeline A (17);
a blower (4) which is arranged outside the closed aeration tank (2), wherein one end of the blower (4) is connected with the aeration device (5), and the other end is connected with an air filter (3);
SO2a detector (7) arranged on the exhaust pipeline A (17) and used for detecting SO2Concentration;
wherein,
an exhaust pipeline B (18) and an exhaust pipeline C (19) are respectively connected with the exhaust pipeline A (17), a valve B (8) is arranged on the exhaust pipeline B (18), and a valve C (9) is arranged on the exhaust pipeline C (19);
the desulfurized seawater quality of water recovery device still includes:
an absorption tower (10) with its bottom end connected to the exhaust line C (19) after the valve C (9); the absorption tower (10) is internally provided with an air distributor (11), a supporting layer (12), a filler (13) and a water distribution nozzle (16) from bottom to top in sequence, and the top of the absorption tower (10) is provided with an air outlet B (14);
the alkali liquor circulating pump (15) is arranged at the bottom of the outer side of the absorption tower (10), one end of the alkali liquor circulating pump (15) is connected with the bottom of the outer side of the absorption tower (10), and the other end of the alkali liquor circulating pump is connected with the water distribution nozzle (16);
automatic control devices respectively connected to the SOs2A detector (7), a valve B (8), a valve C (9) and an alkali liquor circulating pump (15) according to the SO2And the opening and closing of the valve B (8), the valve C (9) and the alkali liquor circulating pump (15) are controlled by the detection result of the detector (7).
2. The apparatus for recovering quality of desulfurized seawater according to claim 1, wherein said aeration means (5) is provided at the bottom end inside said closed aeration tank (2).
3. The apparatus for recovering quality of desulfurized seawater according to claim 1, wherein said aeration means (5) is provided at the top end inside said closed aeration tank (2).
4. The apparatus for recovering quality of desulfurized seawater according to claim 1, wherein said packing is porous packing.
5. The apparatus for recovering the quality of desulfurized seawater according to claim 1, wherein an atomizing nozzle is further provided on the inner wall of said absorption tower between said distribution nozzle (16) and said packing (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521013058.6U CN205313162U (en) | 2015-12-09 | 2015-12-09 | Desulfurized seawater water quality recover device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521013058.6U CN205313162U (en) | 2015-12-09 | 2015-12-09 | Desulfurized seawater water quality recover device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205313162U true CN205313162U (en) | 2016-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521013058.6U Expired - Fee Related CN205313162U (en) | 2015-12-09 | 2015-12-09 | Desulfurized seawater water quality recover device |
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| Country | Link |
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| CN (1) | CN205313162U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105366795A (en) * | 2015-12-09 | 2016-03-02 | 大唐环境产业集团股份有限公司 | Desulfurized seawater water quality restoration device and method |
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2015
- 2015-12-09 CN CN201521013058.6U patent/CN205313162U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105366795A (en) * | 2015-12-09 | 2016-03-02 | 大唐环境产业集团股份有限公司 | Desulfurized seawater water quality restoration device and method |
| CN105366795B (en) * | 2015-12-09 | 2018-05-25 | 大唐环境产业集团股份有限公司 | A kind of desulfurization seawater quality recovery device and method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160615 Termination date: 20211209 |
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| CF01 | Termination of patent right due to non-payment of annual fee |