CN205313161U - Desulfurized seawater recovery device based on oxygen aeration - Google Patents
Desulfurized seawater recovery device based on oxygen aeration Download PDFInfo
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- CN205313161U CN205313161U CN201521013117.XU CN201521013117U CN205313161U CN 205313161 U CN205313161 U CN 205313161U CN 201521013117 U CN201521013117 U CN 201521013117U CN 205313161 U CN205313161 U CN 205313161U
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Abstract
The utility model relates to a desulfurized seawater recovery device based on oxygen aeration, the equalizing basin is the aeration tank even, establishes the aerator in the aeration tank, establishes the gas vent on the aeration tank, air -blower one end is the aerator even, and the other end is the oxygen storage tank even, establishes pressure sensor on the oxygen storage tank, oxygen generator links with the oxygen storage tank, establishes the valve between oxygen storage tank and oxygen generator, the absorption tower is outside the aeration tank, and the gas distribution ware is established to the bottom in the aeration tank, and an one way check valve is even established to gas distribution ware and gas vent between gas vent and gas distribution ware, and the gaseous emission mouth is established at the absorption tower top, and the gaseous emission mouth links with the oxygen storage tank, and the 2nd one way check valve is established within a definite time to gaseous emission mouth and oxygen storage tank, and the absorption liquid discharge port is established to the absorption tower bottom, the SO2 on -line measuring appearance is in between a gas vent and an one way check valve. The beneficial effect of the utility model: closed oxygen aeration combines with the acid gas auxiliary absorber, reduces the aeration rate, prevents to reduce the CO2 emission because of the secondary pollution that SO2 escaped and arouses, reduces absorption tower volume and area.
Description
Technical field
The utility model relates to ambient water process, is specifically related to a kind of desulfurization restoring sea water device based on pure oxygen aeration.
Background technology
Rich coal resources in China, coal fired power generation is done to be widely used in China because having technology maturation, the advantage such as reliable, be the topmost energy resource supply mode of China. In addition, also having a large amount of industry coal-boiler and ship power coal firing boiler etc., the flue gas that coal firing boiler produces contains the SO of high density2, in order to prevent SO in flue gas2Cause the environmental pollutions such as haze, it is necessary to take respective handling measure. In numerous flue gas desulfurization technique, seawater desulfurizing process does not need additionally to consume fresh water and absorption agent, without byproduct and waste, technique is simple, easy to maintenance, reduces investment outlay and working cost, there is plurality of advantages, therefore apply more in coastal coal-burning power plant and ship boiler combustion gas process.
Seawater desulfurizing process mainly utilizes the natural weak alkali (pH is about 8) of seawater to absorb SO in flue gas2A kind of wet fuel gas desulfurizing technology, the SO of Absorption by Sea Water2Finally generating vitriol, vitriol is one of main component in seawater, therefore, and SO2Absorb on seawater produce impact very little. This technique mainly comprises two step chemical reaction: SO2SO is changed into by Absorption by Sea Water3 2-, then through aeration by SO3 2-It is oxidized to stable SO4 2-, absorb SO2The acidic hydrogen ion of rear generation is by CO3 2-And HCO3-Neutralize and produce CO2Gas. According to relevant regulations, just desulfurization seawater pH must reach more than 6.8 can enter nature marine site, in order to make water outlet pH qualified discharge, generally by desulfurization seawater being carried out the mode of air aeration, on the one hand by the oxygen in air by SO3 2-It is oxidized to stable SO4 2-, on the other hand, make the CO in seawater at the stripping of air with under carrying effect secretly2Overflow, the final recovery promoting seawater pH.
Owing to when low pH, oxygen is to SO3 2-Rate of oxidation is very low, therefore general before entering aeration tank to blending certain proportion seawater (from water coolant) in desulfurization seawater, to improve the initial pH of aeration tank maritime interior waters, owing to content of oxygen in air is lower, this just causes, and air requirements amount is huge, energy consumption height and the big shortcoming of floor space. In order to cost-saving, in general control aeration tank, initial pH is 3～5, and owing to pH initial in aeration tank is lower, now a large amount of aeration is easy to cause the SO in desulfurization seawater2Overflow, cause secondary pollution. In addition, in order to recover the pH of seawater, a large amount of greenhouse gases CO2Being blown holder enters in air, in today of Global warming, does not meet environmental protection theory.
Therefore, in order to avoid because of SO in aeration tank2Overflow the secondary pollution and CO that cause2Discharge, it is necessary to develop novel treatment technique with environmental protection more economically.
Practical novel content
For the weak point existed in the problems referred to above, the utility model provides a kind of SO2 spilling problem overcoming tradition aeration system and existing, and prevents SO2 and CO2 from entering the desulfurization restoring sea water device based on pure oxygen aeration of air.
For achieving the above object, the utility model provides a kind of desulfurization restoring sea water device based on pure oxygen aeration, comprising:
Equalizing tank, it connects aeration tank by seawater pipeline, and the bottom of inside, described aeration tank is provided with aerator, and described aeration tank is provided with venting port;
Gas blower, its one end is connected with described aerator;
Oxygen storage tank, it is connected with the other end of described gas blower, and described oxygen storage tank is provided with pressure detecting instrument;
Oxygen generator, it is connected with described oxygen storage tank by gas exhaust duct, and the gas exhaust duct between described oxygen storage tank and described oxygen generator is provided with valve;
Absorption tower, it is located at outside described aeration tank, the bottom of inside, described aeration tank is provided with gas pipe, described gas pipe is connected with described venting port by gas exhaust duct, gas exhaust duct between described venting port and described gas pipe is provided with the first one-way cock, top, described absorption tower is provided with gas discharge outlet, described gas discharge outlet is connected with described oxygen storage tank by gas exhaust duct, gas exhaust duct between described gas discharge outlet and described oxygen storage tank is provided with the 2nd one-way cock, and the bottom on described absorption tower is provided with absorbing liquid discharge outlet;
SO2On-line detector, it is located on the gas exhaust duct between described venting port and described first one-way cock.
As the improvement that the utility model is further, described aeration tank is closed.
As the improvement that the utility model is further, described oxygen storage tank is cylinder shape or spherical.
As the improvement that the utility model is further, the top of inside, described absorption tower is provided with filler or spray spout.
Improving further as the utility model, the alkaline absorbent in described absorption tower is sodium hydroxide solution or aqua calcis.
Preferred as the utility model, the mass concentration of described sodium hydroxide solution is 1%～30%.
The beneficial effects of the utility model are:
1, closed pure oxygen aeration device is adopted, it is possible to make full use of oxygen, it is to increase the utilising efficiency of oxygen;
2, the setting on the auxiliary absorption tower of sour gas, it is possible to avoid SO2And CO2Gas enters in air, prevents atmospheric pollution, also is conducive to preventing sour gas to the corrosion of oxygen conveying pipe and equipment simultaneously;
3, aeration by the automatic closedown on automatic control realization absorption tower, thus can save the running cost of whole device;
4, adopting pure oxygen aeration, oxygen density is big, rate of oxidation height, it is possible to reduces aeration tank volume, thus reduces floor space;
5, by the auto-switch of the change control oxygen generator of pressure in oxygen storage tank, it is ensured that the air pressure in oxygen storage tank is in 0～20kPa, avoids because of hypotony in oxygen storage tank or the too high normal operation affecting device.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of desulfurization restoring sea water device based on pure oxygen aeration of the utility model;
Fig. 2 utilizes the recovery device shown in Fig. 1 to carry out the schematic flow sheet of desulfurization restoring sea water.
In figure,
1, equalizing tank; 2, aeration tank; 3, oxygen generator; 4, valve; 5, oxygen storage tank; 6, pressure detecting instrument; 7, gas blower; 8, aerator; 9, venting port; 10, SO2 on-line detector; 11, the first one-way cock; 12, absorption tower; 13, gas pipe; 14, absorbing liquid discharge outlet; 15, gas discharge outlet; 16, the 2nd one-way cock.
Embodiment
As shown in Figure 1, a kind of desulfurization restoring sea water device based on pure oxygen aeration described in the utility model embodiment, comprises equalizing tank 1, aeration tank 2, oxygen generator 3, valve 4, oxygen storage tank 5, pressure detecting instrument 6, gas blower 7, aerator 8, venting port 9, SO2On-line detector 10, first one-way cock 11, absorption tower 12, gas pipe 13, absorbing liquid discharge outlet 14, gas discharge outlet 15 and the 2nd one-way cock 16.
Equalizing tank 1 connects aeration tank 2 by seawater pipeline, and aeration tank 2 is closed. The bottom of inside, aeration tank 2 is provided with aerator 8, and aeration tank 2 is provided with venting port 9. One end of gas blower 7 is connected with aerator 8, and the other end is connected with oxygen storage tank 5. Oxygen generator 3 is connected with oxygen storage tank 5 by gas exhaust duct, and the gas exhaust duct between oxygen storage tank 5 and oxygen generator 3 is provided with valve 4. Oxygen storage tank 5 is cylinder shape or spherical, oxygen storage tank 5 is provided with pressure detecting instrument 6, changed by the pressure in oxygen storage tank 5, the auto-switch of control oxygen generator 3 and valve 4, when pressure detecting instrument 6 detect be in negative pressure in oxygen storage tank 5 time, open oxygen generator 3 and the auto-switch of valve 4, ensure that air pressure is greater than 0 in oxygen storage tank 5, when pressure detecting instrument 6 detects that in oxygen storage tank 5, pressure is greater than 20kPa, the auto-switch of oxygen generator 3 and valve 4. Due to initial pH lower (3～5) in aeration tank, and major part sulphur is with SO3 2-Form exists, and therefore may have part SO2Can overflow along with air, even cause SO in Exhaust Gas2Exceed standard. Therefore, the auxiliary absorption tower 12 of sour gas it is provided with in the outside of closed aeration tank 2. The bottom of inside, aeration tank 2 is provided with gas pipe 13, gas pipe 13 is connected with venting port 9 by gas exhaust duct, gas exhaust duct between venting port 9 and gas pipe 13 is provided with the first one-way cock 11, top, absorption tower 12 is provided with gas discharge outlet 15, gas discharge outlet 15 is connected with oxygen storage tank 5 by gas exhaust duct, gas exhaust duct between gas discharge outlet 15 and oxygen storage tank 5 is provided with the 2nd one-way cock 16, and the bottom on absorption tower 12 is provided with absorbing liquid discharge outlet 14. SO2On-line detector 10 is located on the gas exhaust duct between venting port 9 and the first one-way cock 11.
Absorption tower 12 can adopt above-mentioned bottom aeration form, it is possible to installs filler or spray spout additional on the top of inside, absorption tower 12, increases gas-liquid contact time and contact area.
As shown in Figure 2, the step adopting desulfurization restoring sea water device as shown in Figure 1 to carry out desulfurization restoring sea water is:
Step 1, after desulfurization seawater is discharged by thionizer, desulfurization seawater enters in equalizing tank 1 with cooled with seawater water and mixes, and the pH value in regulating and controlling pond 1 is 3～5;
Step 2, mixing desulfurization seawater flows under the influence of gravity in closed aeration tank 2, flows through the aeration zone bottom aeration tank 2 according to water plug flow mode;
Step 3, opens valve 4 and oxygen generator 3, and first the oxygen of generation enter oxygen storage tank 5, is then evenly blown in mixing desulfurization seawater by the aerator 8 bottom aeration tank 2 by oxygen under the effect of gas blower 7;
Step 4, the oxygen dissolution in mixing desulfurization seawater is mixing after in desulfurization seawater, will mix the SO in desulfurization seawater3 2-It is oxidized to stable SO4 2-, making mixing desulfurization seawater produces a large amount of H+, blowing holder and carrying effect secretly in conjunction with oxygen, makes the CO in mixing desulfurization seawater simultaneously2It is purged, it is achieved seawater pH qualified discharge;
When lower pH, part SO2Can overflow, containing oxygen, CO in the mixed gas therefore produced in aeration tank 22、SO2Deng, mixed gas enters absorption tower 12 by venting port 9. Therefore, after the mixed gas produced in aeration tank 2 passes through venting port 9, SO2On-line detector 10 detects the mixed gas by venting port 9, if SO2On-line detector 10 detects that venting port 9 has SO2, then next step is carried out;
Step 5, open the first one-way cock 11, mixed gas is entering absorption tower 12 after the first one-way cock 11, then mixed gas evenly blasts in the alkaline absorbent on absorption tower 12 by being arranged on the gas pipe 13 bottom absorption tower 12, in the process that mixed gas contacts with alkaline absorbent, CO wherein2、SO2Being removed with alkaline absorbent generation neutralization reaction, the oxygen after absorption cleaning discharges absorption tower 12 by gas discharge outlet 15, is entering oxygen storage tank 5 through the 2nd one-way cock 16, is reused by gas blower 7.
Liquid oxygen can be adopted to replace oxygen generator 3 as source of oxygen.
Oxygen storage tank 5 is provided with pressure detecting instrument 6, changed by the pressure in oxygen storage tank 5, the auto-switch of control oxygen generator 3 and valve 4, when pressure detecting instrument 6 detect be in negative pressure in oxygen storage tank 5 time, open oxygen generator 3 and the auto-switch of valve 4, ensure that in oxygen storage tank 5, air pressure is greater than 0, when pressure detecting instrument 6 detects that in oxygen storage tank 5, pressure is greater than 20kPa, the auto-switch of oxygen generator 3 and valve 4.
Alkaline absorbent in absorption tower 12 is sodium hydroxide solution or aqua calcis. Wherein, the mass concentration of sodium hydroxide solution is 1%～30%. When the pH value of alkaline absorbent is reduced to 7～8, more renew alkaline absorbent to guarantee assimilated efficiency.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations. All within spirit of the present utility model and principle, any amendment of doing, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (6)
1. the desulfurization restoring sea water device based on pure oxygen aeration, it is characterised in that, comprising:
Equalizing tank (1), it connects aeration tank (2) by seawater pipeline, and the bottom of described aeration tank (2) inside is provided with aerator (8), and described aeration tank (2) are provided with venting port (9);
Gas blower (7), its one end is connected with described aerator (8);
Oxygen storage tank (5), it is connected with the other end of described gas blower (7), and described oxygen storage tank (5) is provided with pressure detecting instrument (6);
Oxygen generator (3), it is connected with described oxygen storage tank (5) by gas exhaust duct, and the gas exhaust duct between described oxygen storage tank (5) and described oxygen generator (3) is provided with valve (4);
Absorption tower (12), it is located at described aeration tank (2) outward, the bottom of inside, described aeration tank (2) is provided with gas pipe (13), described gas pipe (13) is connected with described venting port (9) by gas exhaust duct, gas exhaust duct between described venting port (9) and described gas pipe (13) is provided with the first one-way cock (11), described absorption tower (12) top is provided with gas discharge outlet (15), described gas discharge outlet (15) is connected with described oxygen storage tank (5) by gas exhaust duct, gas exhaust duct between described gas discharge outlet (15) and described oxygen storage tank (5) is provided with the 2nd one-way cock (16), the bottom on described absorption tower (12) is provided with absorbing liquid discharge outlet (14),
SO2On-line detector (10), it is located on the gas exhaust duct between described venting port (9) and described first one-way cock (11).
2. desulfurization restoring sea water device according to claim 1, it is characterised in that, described aeration tank (2) are for closed.
3. desulfurization restoring sea water device according to claim 1, it is characterised in that, described oxygen storage tank (5) is cylinder shape or spherical.
4. desulfurization restoring sea water device according to claim 1, it is characterised in that, the top of described absorption tower (12) inside is provided with filler or spray spout.
5. desulfurization restoring sea water device according to claim 1, it is characterised in that, the alkaline absorbent in described absorption tower (12) is sodium hydroxide solution or aqua calcis.
6. desulfurization restoring sea water device according to claim 5, it is characterised in that, the mass concentration of described sodium hydroxide solution is 1%～30%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521013117.XU CN205313161U (en) | 2015-12-09 | 2015-12-09 | Desulfurized seawater recovery device based on oxygen aeration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521013117.XU CN205313161U (en) | 2015-12-09 | 2015-12-09 | Desulfurized seawater recovery device based on oxygen aeration |
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| CN205313161U true CN205313161U (en) | 2016-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201521013117.XU Expired - Fee Related CN205313161U (en) | 2015-12-09 | 2015-12-09 | Desulfurized seawater recovery device based on oxygen aeration |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105417675A (en) * | 2015-12-09 | 2016-03-23 | 大唐环境产业集团股份有限公司 | Device and method for restoring desulphurized sea water based on pure oxygen aeration |
| CN106336105A (en) * | 2016-10-09 | 2017-01-18 | 上海市政工程设计研究总院（集团）有限公司 | Method for vertical solar intensified deep biological drying of sludge |
-
2015
- 2015-12-09 CN CN201521013117.XU patent/CN205313161U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105417675A (en) * | 2015-12-09 | 2016-03-23 | 大唐环境产业集团股份有限公司 | Device and method for restoring desulphurized sea water based on pure oxygen aeration |
| CN105417675B (en) * | 2015-12-09 | 2018-01-19 | 大唐环境产业集团股份有限公司 | A kind of desulfurization restoring sea water device and restoration methods based on pure oxygen aeration |
| CN106336105A (en) * | 2016-10-09 | 2017-01-18 | 上海市政工程设计研究总院（集团）有限公司 | Method for vertical solar intensified deep biological drying of sludge |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160615 Termination date: 20211209 |