CN205164487U - External recycle slurry liquid bath that has in magnesium oxide method flue gas desulfurization system - Google Patents
External recycle slurry liquid bath that has in magnesium oxide method flue gas desulfurization system Download PDFInfo
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- CN205164487U CN205164487U CN201520798347.5U CN201520798347U CN205164487U CN 205164487 U CN205164487 U CN 205164487U CN 201520798347 U CN201520798347 U CN 201520798347U CN 205164487 U CN205164487 U CN 205164487U
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Abstract
The utility model discloses an external recycle slurry liquid bath that has in magnesium oxide method flue gas desulfurization system, the recycle slurry liquid bath is through first partition baffle, the baffle is separated to the second, the third is separated the baffle and is divided the zoneofoxidation into, settling zone and clear solution district, the direction design of intaking of liquid pipeline has 10% slope under the bottom of the pool edge tower of recycle slurry liquid bath, recycle slurry liquid bath one side supplies the thick liquid device through supplying thick liquid electric butterfly valve to be connected with, install the pH on -line control instrument in the recycle slurry liquid bath, link with supplying thick liquid electric butterfly valve, the recycle slurry liquid bath disposes latent dirty pump, the recycle slurry liquid bath is concrete structure, glass steel anti -corrosion material is adopted on the inner wall surface. The utility model discloses can supply among the desulfurization system one or duo tai absorption tower to share simultaneously, can make full use of absorbent magnesium oxide, reduced the cost input to absorption tower body and corresponding some supporting facility, can avoid the tower in the too high imported flue thick liquid that results in of thick liquid liquid level flow backwards, the fresh water (FW) quantity is practiced thrift in convenient maintenance.
Description
Technical field
The utility model relates to a kind of recycle slurry liquid pool, specifically, be in a kind of magnesium oxide method flue gas desulphurization system with external recycle slurry liquid pool.
Background technology
Magnesia FGD technology is one comparatively ripe in wet desulfurizing process, has very many application achievements, also have some areas to adopt this method to carry out flue gas desulfurization improvement at present in China all over the world.China's magnesia reserves resources is very abundant, as the sufficient raw of desulfurizing agent, can be applied in the desulphurization system of power plant and go.Generally the efficiency of magnesium oxide method desulfurization can up to more than 95%, higher than the desulfuration efficiency of calcium method.Simultaneously the liquid-gas ratio of magnesium processes desulphurization system is far below calcium method, and the water, electricity and gas energy consumption in the selection of the structural design therefore on absorption tower, serum recycle amount, the sizing of process equipment, the scale of total system and actual motion etc. are many-sided all has certain superiority.Accessory substance magnesium sulfate and magnesium sulfite have higher economic use value.The sharpest edges of magnesium oxide method desulphurization system can reduce or avoid equipment scaling blockage problem in system operation, and system cloud gray model safety is secure.
Magnesium processes desulfurization adopts the common system of wet desulfurizing process, be made up of flue gas system, absorbent preparation system, serum recycle system, accessory substance treatment system etc., wherein serum recycle system many employings tower inner loop mode, namely absorption tower structure is divided into two parts, bottom is have the slurries district that required absorbent is run on absorption tower, top is flue gas circulation spray-absorption district, carries out absorption reaction to remove SO at this
2.When system cloud gray model break down or plant maintenance maintenance time, need shut down liquid in tower is all transferred in accident serum pot, when system generation Crystallization Plugging or slurry solid content too high cause precipitation time, safeguard and maintenance tool acquiring a certain degree of difficulty.
Utility model content
For solving the problem, the utility model provide in a kind of magnesium oxide method flue gas desulphurization system with external recycle slurry liquid pool.
The purpose of this utility model is achieved through the following technical solutions: in a kind of magnesium oxide method flue gas desulphurization system with external recycle slurry liquid pool, recycle slurry liquid pool is by the first separation baffles, second separation baffles, 3rd separation baffles is divided into zoneofoxidation, settling zone and clear liquid area, 10% gradient is designed with along the water inlet direction of liquid pipeline under tower at the bottom of the pond of recycle slurry liquid pool, be beneficial to accumulation and the discharge of precipitation and crystallization, recycle slurry liquid pool side is by being connected with slurry feeding device for slurry electric butterfly valve, pH On-line Control instrument is installed in recycle slurry liquid pool, for controlling the absorbent situation used needed for whole desulphurization system, control operation easy, accessory substance magnesium sulfate and magnesium sulfite are discharged by submersible sewage pump is unified, link with for starching electric butterfly valve, when pH value is lower than setting value, automatically supplementary slurries are opened until slurry pH value reaches setting range for the slurry electric butterfly valve that supplies for slurry.Recycle slurry liquid pool is configured with submersible sewage pump, for the water in pond and mud are expelled to assigned address, recycle slurry liquid pool is xoncrete structure, inner wall surface adopts reinforced plastics, earth's surface or underground can be built according to actual condition, Pool body design is rectangle, and its concrete form with Operating condition adjustment, can have better applicability.
As preferably, the pond body of recycle slurry liquid pool is provided with overfall and emptying pipe, to maintain ordinary water level and the Maintenance and Repair of slurry pool.
As preferably, the second separation baffles, the 3rd separation baffles be not in slurries, and its edge, upper and lower keeps certain distance respectively with at the bottom of the pond of liquid level and recycle slurry liquid pool, and the pool wall of recycle slurry liquid pool is fixed in both sides.
As preferably, aeration pipe network is installed in zoneofoxidation, is positioned at the position on the lower side of water level when recycle slurry liquid pool normally runs, keeps certain distance with at the bottom of pond, to ensure the degree of oxidation of accessory substance and to prevent the accumulation of crystalline deposit.
As preferably, the first separation baffles forms fluid-tight in the access port side of pipeline and zoneofoxidation under absorption tower.
As preferably, pH On-line Control instrument is installed on clear liquid area.
As preferably, submersible sewage pump is arranged on settling zone end lowest part, and settling zone is provided with maintenance cat ladder.
As preferably, under absorption tower, discharge line is before access zoneofoxidation, can carry out tubular service by being located at neighbouring piping shaft.
Compared with prior art, the utility model has the following advantages:
Can share for one or more absorption tower in desulphurization system simultaneously, absorbent magnesia can be made full use of, without the need to arranging independent slurry regime for every platform absorption tower, decrease and the cost of absorption tower body and appropriate section auxiliary facility is dropped into, originally the recycle slurry liquid zone entirety being positioned at absorption tower is external, and the too high inlet flue duct slurries caused of liquid level of slurry in tower can be avoided to flow backwards; During the device fails of absorption tower, without the need to emptying slurry pool, can directly overhaul equipment in absorption tower and tower; Recycle slurry liquid pool is designed to opened type so that the autoxidation process of desulfurizing byproduct, passes into the forced oxidation of aeration tube for necessity simultaneously, have stirring action concurrently to reduce the precipitation in this region in zoneofoxidation; Supernatant is after precipitation got back to clear liquid area and can be reused, and saves fresh water (FW) consumption.
Accompanying drawing explanation
Fig. 1 be in a kind of magnesium oxide method of the utility model embodiment flue gas desulphurization system with the structural representation of external recycle slurry liquid pool;
Fig. 2 is the generalized section of A-A in Fig. 1;
Fig. 3 is the generalized section of B-B in Fig. 1;
Fig. 4 is the generalized section of C-C in Fig. 1;
In figure, 1-clear liquid area, 2-zoneofoxidation, 3-settling zone, 4-separation baffles, 5-separation baffles, 6-separation baffles, 7-overhauls cat ladder.
Detailed description of the invention
Below in conjunction with specific embodiment, the utility model is described in detail.Following examples will contribute to those skilled in the art and understand the utility model further, but not limit the utility model in any form.It should be pointed out that to those skilled in the art, without departing from the concept of the premise utility, some distortion and improvement can also be made.These all belong to protection domain of the present utility model.
As shown in Figure 1, the utility model embodiment provide in a kind of magnesium oxide method flue gas desulphurization system with external recycle slurry liquid pool, recycle slurry liquid pool is by the first separation baffles 4, second separation baffles 5, 3rd separation baffles 6 is divided into zoneofoxidation 2, settling zone 3 and clear liquid area 1, 10% gradient is designed with along the water inlet direction of liquid pipeline under tower at the bottom of the pond of recycle slurry liquid pool, be beneficial to accumulation and the discharge of precipitation and crystallization, recycle slurry liquid pool upper end is by being connected with slurry feeding device for slurry electric butterfly valve, pH On-line Control instrument is installed in recycle slurry liquid pool, for controlling the absorbent situation used needed for whole desulphurization system, control operation easy, accessory substance magnesium sulfate and magnesium sulfite are discharged by submersible sewage pump is unified, link with for starching electric butterfly valve, when pH value is lower than setting value, automatically supplementary slurries are opened until slurry pH value reaches setting range for the slurry electric butterfly valve that supplies for slurry.Recycle slurry liquid pool is configured with submersible sewage pump, for the water in pond and mud are expelled to assigned address, recycle slurry liquid pool is xoncrete structure, inner wall surface adopts reinforced plastics, earth's surface or underground can be built according to actual condition, Pool body design is rectangle, and its concrete form with Operating condition adjustment, can have better applicability.
The pond body of recycle slurry liquid pool is provided with overfall and emptying pipe, to maintain ordinary water level and the Maintenance and Repair of slurry pool.
Second separation baffles 5, the 3rd separation baffles 6 be not in slurries, and its edge, upper and lower keeps certain distance respectively with at the bottom of the pond of liquid level and recycle slurry liquid pool, and the pool wall of recycle slurry liquid pool is fixed in both sides.
Aeration pipe network is installed in zoneofoxidation 2, is positioned at the position on the lower side of water level when recycle slurry liquid pool normally runs, keeps certain distance with at the bottom of pond, to ensure the degree of oxidation of accessory substance and to prevent the accumulation of crystalline deposit.
First separation baffles 4 forms fluid-tight in the access port side of pipeline and zoneofoxidation under absorption tower.
PH On-line Control instrument is installed on clear liquid area 1.
Submersible sewage pump is arranged on settling zone end lowest part, and settling zone is provided with maintenance cat ladder.
Under absorption tower, discharge line is before access zoneofoxidation, can overhaul by being located at neighbouring piping shaft.
In this concrete enforcement desulphurization system running, keep certain water level in recycle slurry liquid pool, the inlet duct of one or more absorption tower slurry circulating pump picks out by clear liquid area 1, SO in spray-absorption flue gas in tower
2be connected with zoneofoxidation 2 by by absorption tower bottom pipe, in zoneofoxidation 2, form fluid-tight by the first separation baffles 4.Pond body is opened type, desulfurizing byproduct autoxidation, is equipped with oxidation pipe network for forced oxidation if desired in zoneofoxidation 2, has stirring action concurrently and prevents crystalline deposit herein from piling up.Clear liquid area 1 is provided with pH on-Line Monitor Device, when pH value is lower than range of set value minimum, automatically opens supplementary slurries until slurry pH value is closed after reaching setting range automatically for the slurry electric butterfly valve that supplies for slurry.Slurries after spray in tower enter zoneofoxidation 2, and be circulated to settling zone 3 after oxidation, part solid-liquor separation, upper clear supernate continues to be circulated to clear liquid area and recycles, and bottom crystalline deposit imports minimum point at the bottom of the pond of 10% gradient, is regularly discharged by submersible sewage pump.Second separation baffles 5 and the 3rd separation baffles 6, by clear liquid area, settling zone, final precipitation drain position partial partition respectively, slow down water velocity simultaneously, extend oxidation and sedimentation time.
This concrete enforcement can share for one or more absorption tower in desulphurization system simultaneously, absorbent magnesia can be made full use of, without the need to arranging independent slurry regime for every platform absorption tower, decrease and the cost of absorption tower body and appropriate section auxiliary facility is dropped into, originally the recycle slurry liquid zone entirety being positioned at absorption tower is external, and the too high inlet flue duct slurries caused of liquid level of slurry in tower can be avoided to flow backwards; During the device fails of absorption tower, without the need to emptying slurry pool, can directly overhaul equipment in absorption tower and tower; Recycle slurry liquid pool is designed to opened type so that the autoxidation process of desulfurizing byproduct, passes into the forced oxidation of aeration tube for necessity simultaneously, have stirring action concurrently to reduce the precipitation in this region in zoneofoxidation; Supernatant is after precipitation got back to clear liquid area and can be reused, and saves fresh water (FW) consumption.
Above specific embodiment of the utility model is described.It is to be appreciated that the utility model is not limited to above-mentioned particular implementation, those skilled in the art can make various distortion or amendment within the scope of the claims, and this does not affect flesh and blood of the present utility model.
Claims (8)
1. in a magnesium oxide method flue gas desulphurization system with external recycle slurry liquid pool, it is characterized in that, recycle slurry liquid pool is by the first separation baffles (4), second separation baffles (5), 3rd separation baffles (6) is divided into zoneofoxidation (2), settling zone (3) and clear liquid area (1), 10% gradient is designed with along the water inlet direction of liquid pipeline under tower at the bottom of the pond of recycle slurry liquid pool, recycle slurry liquid pool side is by being connected with slurry feeding device for slurry electric butterfly valve, pH On-line Control instrument is installed in recycle slurry liquid pool, link with for starching electric butterfly valve, recycle slurry liquid pool is configured with submersible sewage pump, recycle slurry liquid pool is xoncrete structure, inner wall surface adopts reinforced plastics.
2. in a kind of magnesium oxide method flue gas desulphurization system according to claim 1 with external recycle slurry liquid pool, it is characterized in that, the pond body of recycle slurry liquid pool is provided with overfall and emptying pipe, to maintain ordinary water level and the Maintenance and Repair of slurry pool.
3. in a kind of magnesium oxide method flue gas desulphurization system according to claim 1 with external recycle slurry liquid pool, it is characterized in that, second separation baffles (5), the 3rd separation baffles (6) be not in slurries, its edge, upper and lower keeps certain distance respectively with at the bottom of the pond of liquid level and recycle slurry liquid pool, and the pool wall of recycle slurry liquid pool is fixed in both sides.
4. in a kind of magnesium oxide method flue gas desulphurization system according to claim 1 with external recycle slurry liquid pool, it is characterized in that, zoneofoxidation is provided with aeration pipe network in (2), is positioned at the position on the lower side of water level when recycle slurry liquid pool normally runs, keeps certain distance with at the bottom of pond.
5. in a kind of magnesium oxide method flue gas desulphurization system according to claim 1 with external recycle slurry liquid pool, it is characterized in that, the first separation baffles (4) forms fluid-tight in the access port side of discharge line and zoneofoxidation under absorption tower.
6. in a kind of magnesium oxide method flue gas desulphurization system according to claim 1 with external recycle slurry liquid pool, it is characterized in that, pH On-line Control instrument is installed on clear liquid area (1).
7. in a kind of magnesium oxide method flue gas desulphurization system according to claim 1 with external recycle slurry liquid pool, it is characterized in that, submersible sewage pump is arranged on settling zone end lowest part, settling zone be provided with maintenance cat ladder (7).
8. in a kind of magnesium oxide method flue gas desulphurization system according to claim 1 with external recycle slurry liquid pool, it is characterized in that, under absorption tower discharge line access zoneofoxidation before, tubular service can be carried out by being located at neighbouring piping shaft.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520798347.5U CN205164487U (en) | 2015-10-15 | 2015-10-15 | External recycle slurry liquid bath that has in magnesium oxide method flue gas desulfurization system |
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| CN201520798347.5U CN205164487U (en) | 2015-10-15 | 2015-10-15 | External recycle slurry liquid bath that has in magnesium oxide method flue gas desulfurization system |
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| CN205164487U true CN205164487U (en) | 2016-04-20 |
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| CN201520798347.5U Active CN205164487U (en) | 2015-10-15 | 2015-10-15 | External recycle slurry liquid bath that has in magnesium oxide method flue gas desulfurization system |
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Address after: Room 10007c, 335 Guoding Road, Yangpu District, Shanghai 200082 Patentee after: Shanghai mestec environment (Group) Co.,Ltd. Address before: Room 10007c, 335 Guoding Road, Yangpu District, Shanghai 200433 Patentee before: SHANGHAI MASTECK ENVIRONMENT CO.,LTD. |