CN210795981U - Black water treatment system - Google Patents
Black water treatment system Download PDFInfo
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- CN210795981U CN210795981U CN201921678481.6U CN201921678481U CN210795981U CN 210795981 U CN210795981 U CN 210795981U CN 201921678481 U CN201921678481 U CN 201921678481U CN 210795981 U CN210795981 U CN 210795981U
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Abstract
The utility model discloses a black water treatment system, which comprises a cyclone permeator, a separator, a slurry cooling tank and a centrifuge; the rotational flow permeator is provided with a water outlet, a slurry outlet and an inlet; the slurry outlet of the cyclone permeator is communicated with the slurry inlet of the separator; the liquid outlet of the separator is communicated with the liquid inlet of the slurry cooling tank; the slurry outlet of the slurry cooling tank is communicated with the slurry inlet of the centrifuge; the slurry cooling tank is also provided with a water inlet for receiving cooling water; the centrifugal machine is also provided with a slag discharge port for discharging waste slag and a water discharge port for discharging clear water. The utility model discloses an adopt whirl penetrant, separator, slurry cooling tank and centrifuge, can carry out solid-liquid separation to high parameter black water, obtain dense thick liquid and clear water to carry out the reseparation to high parameter dense thick liquid and obtain the slurry clear water, the clear water after the separation can satisfy the clear water retrieval and utilization requirement, and the slurry then comes direct processing through adopting centrifuge, obtains the lime-ash, has improved the treatment effeciency of black water.
Description
Technical Field
The utility model relates to a waste water treatment technical field especially relates to a black water treatment system.
Background
At present, most of coal chemical industry slag water units at home and abroad adopt a multi-stage flash evaporation process or a slag water indirect heat exchange cooling process to treat black water.
The multistage flash process adopts three-stage flash of a high-pressure flash tank, a low-pressure flash tank and a vacuum flash tank, and is realized by a flash system: cooling and depressurizing, heat recovery and liquid-solid separation. Although the flash evaporation process can well realize temperature reduction, the flash evaporation process is not environment-friendly enough due to serious scouring wear and ash entrainment, the service life of equipment is shortened, the occupied area is large, and the investment cost is high.
The slag water indirect heat exchange cooling process has short flow, less equipment, less investment and low energy consumption, but the indirect cooling technology of the heat exchanger is rarely adopted at home and abroad, and the main reason is the problems of scaling and blockage of the heat exchanger. In the cooling process of slag water, ash carried by the slag water, produced dirt and precipitated salt can scale a pipe box and a heat exchange pipe of a heat exchanger, so that the heat resistance of the heat exchange pipe is increased, the heat exchange efficiency is reduced, the heat exchanger is blocked seriously, the heat exchanger is made to lose efficacy, and finally, a system is stopped, and the working efficiency is reduced. Meanwhile, the scaling can also cause salt accumulation to cause corrosion of the heat exchange pipe.
SUMMERY OF THE UTILITY MODEL
An object of the embodiment of the utility model is to provide a black water treatment system for can't carry out the problem of high-efficient processing to black water among the solution prior art.
In order to solve the technical problem, the embodiment of the application adopts the following technical scheme: a black water treatment system comprising: a cyclone permeator, a separator, a slurry cooling tank and a centrifuge;
the rotational flow permeator is provided with a water outlet, a slurry outlet and an inlet; the slurry outlet of the rotational flow permeator is communicated with the slurry inlet of the separator; the liquid outlet of the separator is communicated with the liquid inlet of the slurry cooling tank; the slurry outlet of the slurry cooling tank is communicated with the slurry inlet of the centrifuge; the slurry cooling tank is further provided with a water inlet for receiving cooling water; the centrifugal machine is also provided with a slag discharge port for discharging waste slag and a water discharge port for discharging clear water.
Optionally, the system further comprises a mixing tank, the mixing tank is provided with a liquid discharge port for discharging mixed liquid, a first water inlet for receiving black water and a second water inlet for receiving grey water, and the liquid discharge port is communicated with the inlet of the cyclone permeator.
Optionally, a pressure reduction device is connected in series between the slurry outlet of the slurry cooling tank and the slurry inlet of the centrifuge.
Optionally, the rotational flow permeator is further provided with a water outlet, and the water outlet is communicated with a water inlet of the delivery pump through a delivery pipe; the conveying pump is used for conveying the clean water treated by the rotational flow permeator to the clean water recovery device.
Optionally, the separator is further provided with a water outlet; the water outlet of the separator is communicated with the water inlet of the conveying pump through a conveying pipe.
Optionally, the separator is a high-pressure vertical separator.
Optionally, the centrifuge is a horizontal screw centrifuge.
Optionally, the mixing tank liquid outlet is communicated with the inlet of the cyclone permeator through a first conveying pipe, and the first conveying pipe is provided with a first flow regulating valve.
Optionally, the slurry outlet of the cyclone permeator is communicated with the slurry inlet of the separator through a second conveying pipe, and a second flow regulating valve is arranged on the second conveying pipe.
Optionally, the liquid outlet of the separator is communicated with the liquid inlet of the slurry cooling tank through a third conveying pipe, and the third conveying pipe is provided with a third flow regulating valve.
The embodiment of the utility model provides a beneficial effect lies in: by adopting the cyclone permeator, the separator, the slurry cooling tank and the centrifuge, the solid-liquid separation can be carried out on the high-parameter black water to obtain thick slurry and clear water, the high-parameter thick slurry is separated again to obtain slurry clear water, the clear water after separation can meet the recycling requirement of the clear water, the slurry is directly treated by adopting the centrifuge to obtain ash, the solid content of the ash is improved, the water content of the ash is reduced, and the treatment efficiency of the black water is improved.
Drawings
FIG. 1 is a block diagram of a black water treatment system according to an embodiment of the present invention;
fig. 2 is a block diagram of a black water processing system according to an embodiment of the present invention.
Detailed Description
Various aspects and features of the present application are described herein with reference to the drawings.
It will be understood that various modifications may be made to the embodiments of the present application. Accordingly, the foregoing description should not be construed as limiting, but merely as exemplifications of embodiments. Those skilled in the art will envision other modifications within the scope and spirit of the application.
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with a general description of the application given above and the detailed description of the embodiments given below, serve to explain the principles of the application.
These and other characteristics of the present application will become apparent from the following description of preferred forms of embodiment, given as non-limiting examples, with reference to the attached drawings.
It should also be understood that, although the present application has been described with reference to some specific examples, a person of skill in the art shall certainly be able to achieve many other equivalent forms of application, having the characteristics as set forth in the claims and hence all coming within the field of protection defined thereby.
The above and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.
Specific embodiments of the present application are described hereinafter with reference to the accompanying drawings; however, it is to be understood that the disclosed embodiments are merely exemplary of the application, which can be embodied in various forms. Well-known and/or repeated functions and constructions are not described in detail to avoid obscuring the application of unnecessary or unnecessary detail. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present application in virtually any appropriately detailed structure.
The specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," which may each refer to one or more of the same or different embodiments in accordance with the application.
The embodiment of the utility model provides a black water processing system, as shown in figure 1, include: a cyclone permeator 1, a separator 2, a slurry cooling tank 3 and a centrifuge 4;
the rotational flow permeator 1 is provided with a water outlet 11, a slurry outlet 12 and an inlet 13; the slurry outlet 12 of the cyclone permeator is communicated with the slurry inlet 21 of the separator 2; the liquid outlet 22 of the separator 2 is communicated with the liquid inlet 31 of the slurry cooling tank 3; the slurry outlet 32 of the slurry cooling tank is communicated with the slurry inlet 41 of the centrifuge 4; the slurry cooling tank 3 is further provided with a water inlet 33 for receiving cooling water; the centrifuge 4 is further provided with a slag discharge port 42 for discharging waste slag and a water discharge port 43 for discharging clean water.
The embodiment of the utility model provides an in, through adopting whirl penetrant, separator, slurry cooling tank and centrifuge, can carry out solid-liquid separation to high parameter black water, obtain dense thick liquid and clear water to carry out the reseparation to high parameter dense thick liquid and obtain the slurry clear water, the clear water after the separation can satisfy the clear water retrieval and utilization requirement, the slurry then comes direct processing through adopting centrifuge, obtains the lime-ash, improves lime-ash solid percentage, reduces lime-ash moisture content, has improved the treatment effeciency of black water from this.
Another embodiment of the present invention provides a black water treatment system, as shown in fig. 2, comprising a cyclone permeator 1, a separator 2, a slurry cooling tank 3, a centrifuge 4 and a mixing tank 5;
the mixing tank arrangement 5 is provided with a drain 53 for discharging the mixed liquor, a first inlet 51 for receiving black water and a second inlet 52 for receiving grey water. The liquid discharge port 53 is connected to the cyclone permeator. The mixing tank has the main function of uniformly mixing the black water and the grey water, has certain buffer adjustment capacity, and provides mixed water with stable composition and uniform flow rate for the rotational flow permeator.
The middle lower part of the rotational flow permeator 1 is provided with a water outlet 11, the bottom of the rotational flow permeator is provided with a slurry outlet 12, and the upper part of the rotational flow permeator is provided with an inlet 13. The inlet 13 of the cyclone permeator is communicated with the liquid outlet 53 of the mixing tank 5 through a first conveying pipe. The slurry outlet 12 of the cyclone permeator 2 is communicated with the separator 2. The water outlet 11 of the rotational flow permeator 1 is communicated with the water inlet of the delivery pump 6 through a delivery pipe; the conveying pump is used for conveying the clean water treated by the rotational flow permeator to the clean water recovery device.
The cyclone permeator in the embodiment is an efficient self-cleaning high-temperature high-pressure solid-liquid separation device, and has the main effects of separating mixed water discharged from a mixing tank, reducing the load of subsequent equipment, and simultaneously separating high-temperature high-pressure clear water reaching the standard and recycling the clear water to a clear water recycling device. The cyclone permeator can divide the mixed water into clear water and thick slurry. Clear water is clear liquid after permeating the membrane, reaches the recycling index and can be directly recycled; the thick slurry is slurry with solid content of about 15%, and needs to enter a separator for further separation. The working principle of the rotational flow permeator is as follows: the mixed water enters the container tangentially, a high-speed rotating downward flow field is formed on the wall surface of the container, the high-speed rotating mixed water passes through the permeable membrane in the permeation section, clear water is formed behind the membrane, and solid particles in the mixed water collide against the wall surface to lose kinetic energy under the action of centrifugal force, sink to the bottom of the container along the wall surface and are finally discharged from the bottom slurry outlet to form thick slurry. On one hand, the membrane flux of the fluid with the high-speed rotation wall surface is increased due to the centrifugal force, so that the clear water quantity behind the membrane is greatly increased, the load of subsequent equipment is reduced, and on the other hand, the permeable membrane can be automatically cleaned, so that the problem of online backwashing of the permeable membrane is solved. The equipment does not contain moving parts, has a simple structure, and is very suitable for high-temperature and high-pressure solid-liquid separation.
The delivery pump in this embodiment is a large-flow low-lift circulating pump, and its main function is to provide circulating power for clear water circulating system, and the clear water recovery unit is beaten back to the pressure boost of retrieval and utilization clear water up to standard. The delivery pump is provided with an outlet and an inlet which are respectively a high-pressure clear water inlet and a washing water outlet of the washing tower. The merged clear water of the cyclone permeator and the clear water of the high-pressure vertical separator enter a delivery pump through a high-pressure clear water inlet, the pressure is increased in the delivery pump, and the recycled clear water reaching the system pressure enters a clear water recovery device through a washing port of a washing tower.
The separator 2 is provided with a liquid outlet 22, a slurry inlet 21 and a water outlet 23. The slurry inlet 21 of the separator 2 is communicated with the slurry outlet 12 of the cyclone permeator 1 through a second conveying pipe. The water outlet 23 is communicated with the water inlet of the delivery pump 6 through a delivery pipe. The liquid outlet 22 is communicated with the slurry cooling tank 3. The separator in the preferred embodiment may be a high pressure vertical separator.
In this embodiment, the high-pressure vertical separator is a high-temperature high-pressure solid-liquid centrifugal separation device, and mainly functions to perform solid-liquid separation on the thick slurry discharged from the cyclone permeator to form high-pressure vertical separator clear water reaching the recycling index and high-pressure vertical separator slurry containing about 50% of solids after concentration. The working principle of the high-pressure vertical separator is as follows: the thick slurry of the cyclone permeator enters the equipment from a slurry inlet at the lower part of the high-pressure vertical separator, rotates along with the high-speed rotation of the equipment, an annular liquid pool is formed in the equipment under the action of centrifugal force, heavy-phase solid particles are centrifugally precipitated on the inner surface of the equipment to form sediment, the sediment is pushed to a lower drying area by a spiral blade in the equipment, the water is further squeezed and then discharged out of the equipment through a lower liquid outlet to form slurry of the high-pressure vertical separator, and clear water is discharged through an upper water outlet to form clear water of the high-pressure vertical separator reaching the recycling index. The liquid holding depth in the equipment can be controlled by adjusting the baffle of the liquid outlet, so that the clean water can reach the recycling index.
The slurry cooling tank 3 is provided with a liquid inlet 31, a slurry outlet 32 and a water inlet 33 for receiving cooling water. The liquid inlet 31 of the slurry cooling tank 3 is connected to the liquid outlet 22 of the separator 2 via a third transfer pipe. The slurry outlet 32 of the slurry cooling tank 3 communicates with the centrifuge 4.
In this embodiment, the slurry cooling tank is used for receiving the slurry from the high-pressure vertical separator and cooling the slurry with cold fresh water, and is also a buffer device for providing slurry with stable composition and uniform flow rate for the centrifuge.
The centrifuge 4 is provided with a slurry inlet 41, a slag discharge port 42 for discharging waste slag, and a water discharge port 43 for discharging clean water. The slurry inlet 41 of the centrifuge 4 is communicated with the slurry outlet 32 of the slurry cooling tank 3 through a conveying pipe.
In this embodiment, a pressure reducing device 7 may be connected in series between the slurry inlet 41 of the centrifuge 4 and the slurry outlet 32 of the slurry cooling tank 3. The pressure reducing device 7 is provided with an inlet and an outlet, the inlet of the pressure reducing device is communicated with the slurry outlet of the slurry cooling tank through a pipeline, and the outlet of the pressure reducing device is communicated with the slurry inlet of the centrifuge through a pipeline. In the process of the specific embodiment, the pressure reducing device can select a hydraulic turbine or a pressure reducing valve according to the scale and economic benefit. The main function is to depressurize the slurry for subsequent treatment.
The centrifuge in this embodiment may be a horizontal screw centrifuge. The horizontal spiral centrifugal machine is a normal pressure solid-liquid centrifugal separation equipment, and its main function is to make the normal pressure mixed slurry undergo the process of solid-liquid separation to form circulating clear water and concentrated ash slag containing 50% of solid. The working principle of the horizontal spiral centrifuge is as follows: the normal pressure low temperature mixed slurry enters the equipment from the rear inlet of the horizontal spiral centrifuge, rotates along with the high-speed rotation of the equipment, forms an annular liquid pool in the equipment under the action of centrifugal force, the heavy phase solid particles centrifugally settle on the inner surface of the equipment to form sediment, the sediment is pushed to a rear drying area by a spiral blade in the equipment, the water is further squeezed and dried and then is discharged out of the equipment through a rear outlet to form ash slag, and the clear water is discharged through a front outlet to form circulating clear water.
Specifically, in this embodiment, the first delivery pipe is communicated, and the first delivery pipe is provided with a first flow regulating valve 8.
The second delivery pipe is provided with a second flow regulating valve 9.
And a third delivery pipe is communicated, and a third flow regulating valve 10 is arranged on the third delivery pipe.
The embodiment of the utility model provides a waste water treatment system is when in-service use, its working process as follows: the flow rate of the black water from the chilling chamber of the gasification furnace is 154.8t/h, the flow rate of the black water with the solid content of 3.65t/h and the flow rate of the grey water at the bottom of the synthesis gas washing tower are 18.27t/h and the solid content of 1.76t/h respectively enter a mixing tank. Separating the mixed water by a cyclone permeator, discharging the cyclone permeator thick slurry with the flow rate of 30.1t/h and the solid content of 5.401t/h into a high-pressure vertical separator for continuous separation; clean water of the rotational flow permeator with the flow rate of 143t/h enters a conveying pump and is conveyed to a clean water recovery device. After being separated by the high-pressure vertical separator, the slurry of the high-pressure vertical separator with the flow rate of 10t/h and the solid content of 5.401t/h is discharged into a slurry cooling tank for cooling; clean water of the high-pressure vertical separator with the flow rate of 20.1t/h enters a conveying pump to be recycled to the system. In the slurry cooling tank, the slurry entering the cooling tank is cooled by normal temperature water from the system so that the slurry temperature is reduced to 80 ℃, and the slurry pressure is reduced to normal pressure by a pressure reducing device and enters a horizontal screw centrifuge. Ash and slag discharging system with flow rate of 10t/h and solid content of 5.401t/h is separated by a horizontal spiral centrifuge; and recycling the clean water with the flow rate of 20t/h to the clean water recycling device. By the treatment of the system, 163t/h of high-temperature and high-pressure clean water is recycled, and the energy and heat consumption is greatly reduced.
The black water treatment system in the embodiment has the following beneficial effects:
1. the utility model discloses black water processing system moves under high temperature high pressure, can save 70% calorific consumption and 4 MPa's circulation consumption of power.
2. The cyclone permeator is used in combination with a high pressure vertical separator. The cyclone permeator with a simple structure is used for carrying out high-parameter black water preliminary separation, high-temperature high-pressure clear water which reaches the standard after separation is directly recycled, and the residual thick slurry with the concentration of about 20 percent enters the high-pressure vertical separator for subsequent separation, so that the load of the high-pressure vertical separator is reduced, and meanwhile, the concentrated slurry can also reach the optimal inlet condition of the vertical high-pressure separator.
3. And (3) performing solid-liquid separation on the high-parameter black water by using the cyclone permeator. The membrane flux is increased through centrifugal force in the cyclone permeator, the clear water separation efficiency is improved, the solid content of filtrate after the membrane is extremely low, the high-temperature and high-pressure black water can be well filtered, the permeable membrane can be self-cleaned, and the equipment maintenance cost is saved.
4. And (3) separating the high-parameter thick slurry by using a high-pressure vertical separator. The settling separation rate of solid particles is increased under the action of centrifugal force in the high-pressure vertical separator, the solid content in clear liquid is low, and the requirement of clear water recycling can be met.
5. The slurry is directly cooled, and a flash system is replaced, so that the number of equipment is reduced.
6. The kinetic energy of the slurry is recovered by adopting a hydraulic turbine technology.
7. The horizontal spiral centrifuge directly processes slurry at normal temperature and normal pressure, improves the solid content of ash, reduces the water content of ash, and reaches the standard of ash transportation.
8. The whole system has short flow, simple structure of single equipment and strong operability, and directly reduces the occupied area of the system and the equipment investment.
The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the protection scope of the present invention is defined by the claims. Various modifications and equivalents of the invention can be made by those skilled in the art within the spirit and scope of the invention, and such modifications and equivalents should also be considered as falling within the scope of the invention.
Claims (10)
1. A black water processing system, comprising: a cyclone permeator, a separator, a slurry cooling tank and a centrifuge;
the rotational flow permeator is provided with a water outlet, a slurry outlet and an inlet; the slurry outlet of the rotational flow permeator is communicated with the slurry inlet of the separator; the liquid outlet of the separator is communicated with the liquid inlet of the slurry cooling tank; the slurry outlet of the slurry cooling tank is communicated with the slurry inlet of the centrifuge; the slurry cooling tank is further provided with a water inlet for receiving cooling water; the centrifugal machine is also provided with a slag discharge port for discharging waste slag and a water discharge port for discharging clear water.
2. The black water treatment system of claim 1, further comprising a mixing tank provided with a drain for discharging mixed liquor, a first water inlet for receiving black water, and a second water inlet for receiving grey water, the drain communicating with the inlet of the cyclone permeator.
3. The black water treatment system according to claim 1, wherein a pressure reducing device is connected in series between the slurry outlet of the slurry cooling tank and the slurry inlet of the centrifuge.
4. The black water treatment system of claim 1, wherein the cyclone permeator is further provided with a water outlet, the water outlet being in communication with a water inlet of the transfer pump through a transfer pipe; the conveying pump is used for conveying the clean water treated by the rotational flow permeator to the clean water recovery device.
5. The black water treatment system of claim 4, wherein the separator is further provided with a drain; the water outlet of the separator is communicated with the water inlet of the conveying pump through a conveying pipe.
6. The black water treatment system of claim 1, wherein the separator is a high pressure vertical separator.
7. The black water treatment system of claim 1, wherein the centrifuge is a horizontal screw centrifuge.
8. The black water treatment system of claim 2, wherein the mixing tank liquid outlet is in communication with the inlet of the cyclone permeator via a first delivery tube, the first delivery tube having a first flow control valve disposed thereon.
9. The black water treatment system of claim 1, wherein the slurry outlet of the cyclone permeator is in communication with the slurry inlet of the separator via a second delivery pipe, and the second delivery pipe is provided with a second flow regulating valve.
10. The black water treatment system according to claim 1, wherein the liquid outlet of the separator is connected to the liquid inlet of the slurry cooling tank via a third duct, and a third flow rate adjusting valve is provided in the third duct.
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| CN201921678481.6U CN210795981U (en) | 2019-10-09 | 2019-10-09 | Black water treatment system |
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| CN201921678481.6U CN210795981U (en) | 2019-10-09 | 2019-10-09 | Black water treatment system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111925041A (en) * | 2020-08-12 | 2020-11-13 | 江苏格里克真空技术有限公司 | Low energy consumption slurry water treatment method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111925041A (en) * | 2020-08-12 | 2020-11-13 | 江苏格里克真空技术有限公司 | Low energy consumption slurry water treatment method |
| CN111925041B (en) * | 2020-08-12 | 2022-05-13 | 江苏格里克真空技术有限公司 | Low energy consumption slurry water treatment method |
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