CN212594898U - Ammonium sulfate slurry ash removal structure - Google Patents
Ammonium sulfate slurry ash removal structure Download PDFInfo
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- CN212594898U CN212594898U CN202021099421.1U CN202021099421U CN212594898U CN 212594898 U CN212594898 U CN 212594898U CN 202021099421 U CN202021099421 U CN 202021099421U CN 212594898 U CN212594898 U CN 212594898U
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Abstract
The utility model provides an ammonium sulfate thick liquid ash removal structure can effectively detach the dust in the ammonium sulfate thick liquid of the concentrated section of desulfurizing tower. The water inlet tank stirrer is arranged in the water inlet tank; the sludge conveying switch main valve is connected with the sludge discharge port; the inlet valve, the sludge conveying pump and the outlet valve are sequentially connected, the inlet valve is connected with the sludge conveying switch main valve through a pipeline, and the outlet valve is connected with the plate-and-frame filter press; the liquid inlet of the water inlet tank is connected with a check valve, the check valve is connected with an ammonium sulfate conveying pipeline, the ammonium sulfate conveying pipeline is connected with an ammonium sulfate discharge pump, and the ammonium sulfate discharge pump is connected with a concentration section of the desulfurizing tower; the process water inlet is connected with a water inlet valve, and the water inlet valve is connected with a water inlet pipeline; the drain port is connected with the emptying valve; the liquid outlet is connected with the emptying valve and the liquid inlet of the clarifying tank; the process water pipeline is connected with the process water tank, the water inlet pipeline and the flushing pipeline; the sludge flushing valve is arranged on a flushing pipeline, and the flushing pipeline is connected with a pipeline which is connected with the inlet valve and the sludge conveying switch main valve.
Description
Technical Field
The utility model relates to an ammonium sulfate thick liquid ash removal structure belongs to coal fired power plant flue gas ammonia process desulfurization technical field.
Background
Coal-fired power plants mostly adopt pulverized coal as fuel for improving the coal-fired efficiency, the pulverized coal is combusted in a hearth of a boiler, hot flue gas formed after combustion contains dust and sulfur dioxide with high concentration, and high-temperature flue gas enters a dust remover through a flue at the tail part of the boiler for dust removal and then is subjected to sulfur dioxide removal through a desulfurization device and further dust removal. The concentration of dust in the flue gas after passing through the dust remover is generally controlled to be 30mg/Nm3However, the dust removal efficiency of the dust remover of some old power plants is lower, and the concentration of dust in the flue gas after the dust remover can only be controlled to be 50mg/Nm3。
For ammonia flue gas desulfurization engineering, ash removal is always a key and difficult point in the operation process, and particularly, the concentration of dust after a dust remover can only be controlled to be 50mg/Nm3When a large amount of dust is enriched in the ammonium sulfate slurry in the concentration section of the desulfurizing tower, the following disadvantages are generated:
1. dust in the ammonium sulfate thick liquid can seriously influence the crystallization of ammonium sulfate in the concentrated section, and the ammonium sulfate product also can be because the dust content is high and the crystal colour deepening becomes black, causes the unable normal sale of ammonium sulfate product, brings great loss for the enterprise.
2. The ash content in the ammonium sulfate slurry is more, so that the blockage of pipelines and equipment can be caused, and the reliability and continuous operation capability of the ash removal system in production operation can be greatly influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, and provide a reasonable in design's ammonium sulfate thick liquid ash handling structure, can effectively detach the dust in the ammonium sulfate thick liquid of the concentrated section of desulfurizing tower.
The utility model provides a technical scheme that above-mentioned problem adopted is: an ammonium sulfate slurry ash removal structure comprises a concentration section of a desulfurizing tower; the method is characterized in that: the device also comprises a water inlet tank, a water inlet tank stirrer, a clarifying tank, a sludge delivery pump, a plate-and-frame filter press, a connecting pipeline assembly, an ammonium sulfate discharge pump, a process water tank and a process water pump; the water inlet tank is provided with a water inlet tank liquid inlet, a water outlet, a process water inlet and a drain outlet; the water inlet tank stirrer is arranged in the water inlet tank; the clarifying tank is provided with a liquid inlet and a sludge outlet of the clarifying tank; the connecting pipeline component comprises a check valve, a water inlet valve, a blow-down valve, a sludge conveying switch main valve, an inlet valve, a water inlet pipeline, an outlet valve, a flushing pipeline, a sludge flushing valve, a process water pipeline and an ammonium sulfate conveying pipeline; the sludge conveying switch main valve is connected with the sludge discharge port; the inlet valve, the sludge conveying pump and the outlet valve are sequentially connected, the inlet valve is connected with the sludge conveying switch main valve through a pipeline, and the outlet valve is connected with a liquid inlet pipeline of the plate-and-frame filter press; the liquid inlet of the water inlet tank is connected with a check valve, the check valve is connected with an ammonium sulfate conveying pipeline, the ammonium sulfate conveying pipeline is connected with an ammonium sulfate discharge pump, and the ammonium sulfate discharge pump is connected with a concentration section of the desulfurizing tower; the process water inlet is connected with a water inlet valve, and the water inlet valve is connected with a water inlet pipeline; the drain port is connected with the emptying valve; the liquid outlet is connected with the emptying valve and the liquid inlet of the clarifying tank; the inlet of the process water pipeline is connected with the process water tank through a process water pump, and the outlet of the process water pipeline is connected with the water inlet pipeline and the flushing pipeline; the sludge flushing valve is arranged on a flushing pipeline, and the flushing pipeline is connected with a pipeline which is connected with the inlet valve and the sludge conveying switch main valve.
The water inlet tank on be provided with the manhole door.
The clarification tank include barrel and cone, cone fixed mounting is in the barrel, the mud discharging port is installed in the bottom of cone.
The utility model is provided with a separation pipe and an overflow port, the separation pipe and the overflow port are both arranged on the barrel body, and the liquid inlet of the clarification tank is connected with the separation pipe; the cone is located below the separator tube.
The bottom of the cone is provided with a hand hole.
The barrel include upper portion barrel and lower part barrel, upper portion barrel and lower part barrel are together fixed, the cone is fixed in the barrel of lower part.
The water inlet tank of the utility model is arranged at the top of the clarification tank.
The utility model discloses still include pressure transmitter, pressure transmitter installs on the feed liquor pipeline of plate and frame filter press.
The utility model discloses still include mud interface appearance, mud interface appearance is installed on the clarification tank.
The separating tube of the utility model is thin at the top and thick at the bottom.
Compared with the prior art, the utility model, have following advantage and effect: 1. the method has the advantages of simple principle, convenient operation, small occupied area and low engineering investment cost, can effectively remove dust in the ammonium sulfate slurry at the concentration section of the desulfurizing tower, improves the quality of ammonium sulfate products, and prevents pipelines and equipment from being blocked; 2. the practical use of the project has good ash removal effect, low energy consumption, low operation cost and high reliability; 3. the ammonium sulfate slurry in the concentration section of the desulfurizing tower is diluted by the water inlet tank, so that the problem of blockage of pipelines and equipment in the ash removing process is well solved; 4. the water inlet tank is internally provided with a water inlet tank stirrer, so that ammonium sulfate slurry with higher concentration and water are uniformly mixed and then enter the clarifying tank, and the ash removal effect is good.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.
The utility model discloses an ammonium sulfate thick liquid ash removal structure, including case 1 of intaking, case agitator 2 of intaking, clarification tank 3, mud interface appearance 4, mud delivery pump 5, pressure transmitter 6, plate and frame filter press 7, connecting tube subassembly 8, the concentrated section 9 of desulfurizing tower, ammonium sulfate discharge pump 10, technology water tank 101 and technology water pump 102.
The water inlet tank 1 is provided with a water inlet tank inlet 11, a water outlet 12, a process water inlet 13, a drain port 14 and a manhole door 15. The water inlet tank 1 is made of Q235-B and is subjected to anti-corrosion treatment by using glass flakes, and the water inlet tank 1 is used for diluting high-concentration ammonium sulfate slurry in a concentration section of the desulfurizing tower so as to prevent equipment and pipelines from being blocked. The mode that the upper portion of bottom feed liquid goes out is adopted to the case of intaking 1, and the distance of 11 centers at the case of intaking is 450mm from the bottom plate, the distance of 12 centers at the liquid outlet is 100mm from the roof, and case of intaking 11 and the liquid outlet 12 are the horizontal direction, and case of intaking 11 pipe diameters of liquid inlet is less than liquid outlet 12. The manhole door 15 is arranged at the lower part of the water inlet tank 1 and has the specification of DN 600. The process water inlet 13 is arranged at the top of the water inlet tank 1 and is vertically arranged, and the length of the process water inlet is 200 mm. The drain port 14 is arranged at the bottom of the water inlet tank 1, and the drain port 14 is attached to the bottom plate of the water tank 1 so as to drain the liquid in the water inlet tank.
The water inlet tank stirrer 2 is arranged in the center of the water inlet tank 1. The water inlet tank stirrer 2 is of a jacking type, the blades and the shaft are made of carbon steel lining rubber, and the water inlet tank stirrer 2 is used for uniformly stirring the ammonium sulfate slurry in the diluted water inlet tank. The blades of the water inlet tank stirrer 2 are 200mm away from the bottom of the tank.
The clarifying tank 3 comprises a cylinder body and a cone 36, and is provided with a clarifying tank liquid inlet 31, a separating pipe 32, an overflow port 33 and a sludge discharge port 34. The center of the liquid inlet 31 of the clarifying tank is 800mm away from the tank top, the center of the overflow port 33 is 300mm away from the tank top, and the pipe diameters of the liquid inlet 31 of the clarifying tank, the overflow port 33 and the liquid outlet 12 of the water inlet tank are consistent.
The cylinder body is made of Q235-B and is subjected to antiseptic treatment by using glass flakes, ammonium sulfate slurry from a concentration section of the desulfurizing tower diluted by the water inlet tank is deposited with dust in a clarifying tank, supernatant automatically flows into a trench, and sludge deposited at the lower part enters a plate-and-frame filter press 7 after being settled.
The separating pipe 32 and the overflow port 33 are both arranged on the cylinder body, the separating pipe 32 is fixed at the center of the clarification tank 3, and the overflow port 33 is connected to the trench. The separation pipe 32 is thin at the top and thick at the bottom, and the design of reducing is adopted, so that the impact on the cone 36 can be reduced, and the blockage of the separation pipe 32 in the operation process can be avoided. The separating tube 32 is made of 2205 material. The ammonium sulfate slurry flows downwards in the separating pipe 32 at a high flow speed and enters the clarifying tank after passing through the cone 36, but the flow speed of the ammonium sulfate slurry is greatly reduced, and the particles in the slurry continuously move downwards due to inertia, so that the effect of separating dust is achieved.
The liquid inlet 31 of the clarifying tank is connected with a separation pipe 32. The liquid inlet 31 of the clarifying tank extends into the center of the separating pipe 32, the outlet is upward, and the material 2205 is adopted.
The cone 36 is fixedly mounted within the barrel and is located below the separator tube 32. The bottom of the cone 36 is provided with a hand hole, which is convenient for maintenance.
The sludge discharge port 34 is arranged at the bottom of the cone 36, the center of the sludge discharge port is 100mm away from the lower bottom surface of the cone 36, and the sludge discharge port is made of 2205 materials.
The cylinder includes an upper cylinder 35 and a lower cylinder 37. The upper cylinder 35 and the lower cylinder 37 are welded together, and the cone 36 is welded and fixed in the lower cylinder 37 and is positioned 600mm below the upper cylinder 35. The upper cylinder 35 and the lower cylinder 37 have the same height. The lower cylinder 37 is provided with an inspection manhole close to the bottom plate. The upper cylinder 35 and the cone 36 are contacted with ammonium sulfate slurry, and glass flakes are adopted for anti-corrosion treatment.
The water inlet tank 1 is arranged at the top of the barrel body of the clarification tank 3.
The connecting pipe assembly 8 includes a check valve 81, a water inlet valve 82, a blow-down valve 83, a sludge transfer switch main valve 84, an inlet valve 85, a water inlet pipe 86, an outlet valve 87, a flushing pipe 88, a sludge flushing valve 89, a process water pipe 810 and an ammonium sulfate transfer pipe 811.
The sludge delivery switch main valve 84 is connected with the sludge discharge port 34.
The inlet valve 85, the sludge conveying pump 5 and the outlet valve 87 are sequentially connected through pipelines to form a sludge conveying pipeline, the inlet valve 85 is connected with the sludge conveying switch main valve 84 through a pipeline, and the outlet valve 87 is connected with a liquid inlet pipeline of the plate-and-frame filter press 7; in this embodiment, the sludge conveying pipelines are two and are arranged in parallel. The sludge transfer pump 5 transfers the dust precipitated in the clarifying tank to a plate-and-frame filter press, adopts a pneumatic diaphragm pump, has the lift of about 80m, and is configured by one use and one standby.
The inlet 11 of the water inlet tank is connected with a check valve 81 through a flange, the check valve 81 is connected with an ammonium sulfate conveying pipeline 811, the ammonium sulfate conveying pipeline 811 is connected with an ammonium sulfate discharge pump 10, and the ammonium sulfate discharge pump 10 is connected with a concentration section 9 of the desulfurizing tower. In this embodiment, two ammonium sulfate discharge pumps 10 are provided in parallel. The concentration section 9 of the desulfurizing tower is made of Q235-B and is subjected to antiseptic treatment by glass flakes, and the function of the section is to store ammonium sulfate slurry. The ammonium sulfate discharge pump 10 is used for conveying high-concentration ammonium sulfate slurry in the concentration section of the desulfurization tower to the water inlet tank.
The process water inlet 13 is connected with the water inlet valve 82 through a flange, and the water inlet valve 82 is connected with the water inlet pipeline 86.
The drain port 14 is connected with the emptying valve 83 through a flange.
The liquid outlet 12 and the emptying valve 83 are respectively connected with a liquid outlet pipeline and a drain pipeline and then are converged into a main pipe to be connected with the liquid inlet 31 of the clarifying tank 3. The process water conduit 810 has an inlet connected to the process water tank 101 via the process water pump 102 and an outlet connected to the water inlet conduit 86 and the flush conduit 88. In this embodiment, two process water pumps 102 are provided and are connected in parallel.
The sludge flushing valve 89 is installed on the flushing pipe 88, and the flushing pipe 88 is connected with a pipe connecting the inlet valve 85 and the sludge delivery switch main valve 84.
The sludge interface instrument 4 is arranged at the top of the clarification tank 3. The sludge interface instrument 4 is used for measuring the height of sludge deposited in the clarifying tank.
And the pressure transmitter 6 is arranged on a liquid inlet pipeline of the plate-and-frame filter press 7 and is used for measuring the pressure at the inlet of the plate-and-frame filter press. The pressure of the liquid inlet pipeline of the plate-and-frame filter press 7 is not lower than 0.6 MPa.
The sludge delivery pump 5, the ammonium sulfate discharge pump 10 and the process water pump 102 are all configured in a one-use-one-standby mode, so that the running stability of the ash removal system can be greatly improved. The ammonium sulfate discharge pump 10 and the process water pump 102 are centrifugal pumps, wherein the ammonium sulfate discharge pump 10 is a variable frequency motor.
An operation method of an ammonium sulfate slurry ash removal structure comprises the following steps:
1) and will the utility model discloses equipment, valve, instrument, pipeline etc. in the system are installed and are accomplished to do corresponding testing, accomplish equipment power transmission and monomer debugging. And (4) checking the states of the equipment and the valves, wherein all the equipment and the valves except the instrument valve are in a closed state.
2) And injecting water into the process water tank 101, and starting any one of the process water pumps 102 when the liquid level reaches more than 4 m. When the desulfurizer is operated, the process water pump 102 is continuously operated.
3) And opening the water inlet valve 82, adding water into the water inlet tank 1, when the liquid level reaches the height of the liquid outlet 12, enabling the process water to flow through the liquid inlet 31 and the separation pipe 32 of the clarification tank through the liquid outlet 12 and enter the clarification tank 3, and opening the water inlet tank stirrer 2 and the check valve 81 until water flows out from the overflow port 33.
4) And when the liquid level of the concentration section 9 of the desulfurizing tower is more than 1.5m, starting any one of the ammonium sulfate discharge pumps 10. Ammonium sulfate thick liquid of storage in the concentrated section 9 of desulfurizing tower is pumped into case 1 of intaking, in case 1 of intaking diluted by process water, and discharge by liquid outlet 12 after 2 misce benes of case agitator of intaking, get into separator tube 32 through clarification tank inlet 31, ammonium sulfate thick liquid falls with higher velocity of flow in separator tube 32, then get into in the clarification tank 3, the velocity of flow of ammonium sulfate thick liquid can greatly reduced in clarification tank 3, particulate matter in the ammonium sulfate thick liquid continues downstream because of inertia, the final sedimentation is in cone 36, the supernatant is then by overflow mouth 33 inflow trench, collect the pit and reuse.
5) And when the sludge interface instrument 4 displays that the height of the sludge deposited in the cone 36 reaches more than 2m, opening a main sludge conveying switch valve 84, an inlet valve 85 and an outlet valve 87, starting the plate-and-frame filter press 7, finally starting the sludge conveying pump 5, wherein the indication number of the pressure transmitter 6 is about 0.6MPa, the sludge in the clarification tank 3 is pumped to the plate-and-frame filter press 7 for filtration, filter cakes enter a sludge warehouse for accumulation, the filter cakes are transported away by a vehicle, and filtrate and supernatant automatically flow into a trench and are collected to a pit for reuse.
6) And when the sludge interface instrument 4 displays that the height of the sludge in the cone 36 is reduced to 0.5m, closing the ammonium sulfate discharge pump 10, closing the water inlet valve 82, the sludge conveying pump 5 and the sludge conveying switch main valve 84 after about 10min for further discharging the sludge in the cone 36, opening the sludge flushing valve 89 for flushing for 5min, closing, and closing the plate and frame filter press 7, the inlet valve 85 and the outlet valve 87.
7) The water inlet tank stirrer 2 is closed, the water inlet tank 1 is emptied by opening the emptying valve 83, and the water inlet valve 82 is opened for flushing. The liquid in the clarifying tank 3 is not emptied, so that the ash removal system is conveniently started again.
The implementation case is as follows: taking ammonia-process flue gas desulfurization engineering of a certain chemical plant as an example, the concentration of dust at the inlet of a desulfurizing tower is 50mg/Nm3The size of the water inlet tank 1 is ∅ 1000mm multiplied by H1400mm, the size of the clarifying tank 3 is ∅ 3500mm multiplied by H6000mm, the height of the upper cylinder 35 and the lower cylinder 37 is 3000mm, the height of the cone 36 is 2500mm, and the flow rate of the sludge delivery pump 5 is 5m3H, lift 60m, flow 5m of plate-and-frame filter press 73H, filtration area 40m2Ammonium sulfate discharge pump 10 flow rate of 60m3H, the head is 48m, and the diameter of the concentration section 9 of the desulfurizing tower is 13.5 m. The inlet tank 1 has a water inlet 11 of DN65, a water outlet 12 of DN100, a process water inlet 13 of DN25 and a drain outlet 14 of DN 50. The liquid inlet 31 of the clarifying tank 3 of the clarifying tank is DN100, the upper part of the separating pipe 32 is DN300, the lower part is DN400, the overflow port 33 is DN100, and the sludge discharge port 34 is DN 80.
In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an example of the structure of the present invention. All the equivalent changes or simple changes made according to the structure, characteristics and principle of the utility model are included in the protection scope of the utility model. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (10)
1. An ammonium sulfate slurry ash removal structure comprises a concentration section of a desulfurizing tower; the method is characterized in that: the device also comprises a water inlet tank, a water inlet tank stirrer, a clarifying tank, a sludge delivery pump, a plate-and-frame filter press, a connecting pipeline assembly, an ammonium sulfate discharge pump, a process water tank and a process water pump; the water inlet tank is provided with a water inlet tank liquid inlet, a water outlet, a process water inlet and a drain outlet; the water inlet tank stirrer is arranged in the water inlet tank; the clarifying tank is provided with a liquid inlet and a sludge outlet of the clarifying tank; the connecting pipeline component comprises a check valve, a water inlet valve, a blow-down valve, a sludge conveying switch main valve, an inlet valve, a water inlet pipeline, an outlet valve, a flushing pipeline, a sludge flushing valve, a process water pipeline and an ammonium sulfate conveying pipeline; the sludge conveying switch main valve is connected with the sludge discharge port; the inlet valve, the sludge conveying pump and the outlet valve are sequentially connected, the inlet valve is connected with the sludge conveying switch main valve through a pipeline, and the outlet valve is connected with a liquid inlet pipeline of the plate-and-frame filter press; the liquid inlet of the water inlet tank is connected with a check valve, the check valve is connected with an ammonium sulfate conveying pipeline, the ammonium sulfate conveying pipeline is connected with an ammonium sulfate discharge pump, and the ammonium sulfate discharge pump is connected with a concentration section of the desulfurizing tower; the process water inlet is connected with a water inlet valve, and the water inlet valve is connected with a water inlet pipeline; the drain port is connected with the emptying valve; the liquid outlet is connected with the emptying valve and the liquid inlet of the clarifying tank; the inlet of the process water pipeline is connected with the process water tank through a process water pump, and the outlet of the process water pipeline is connected with the water inlet pipeline and the flushing pipeline; the sludge flushing valve is arranged on a flushing pipeline, and the flushing pipeline is connected with a pipeline which is connected with the inlet valve and the sludge conveying switch main valve.
2. The ammonium sulfate slurry ash removal structure of claim 1, wherein: the water inlet tank is provided with a manhole door.
3. The ammonium sulfate slurry ash removal structure of claim 1, wherein: the clarifying tank comprises a cylinder body and a cone, the cone is fixedly arranged in the cylinder body, and the sludge discharge port is arranged at the bottom of the cone.
4. The ammonium sulfate slurry ash removal structure of claim 3, characterized in that: the clarifying tank is provided with a separation pipe and an overflow port, the separation pipe and the overflow port are both arranged on the barrel, and a liquid inlet of the clarifying tank is connected with the separation pipe; the cone is located below the separator tube.
5. The ammonium sulfate slurry ash removal structure of claim 3, characterized in that: the bottom of the cone is provided with a hand hole.
6. The ammonium sulfate slurry ash removal structure of claim 3, characterized in that: the cylinder body comprises an upper cylinder body and a lower cylinder body, the upper cylinder body and the lower cylinder body are fixed together, and the cone is fixed in the lower cylinder body.
7. The ammonium sulfate slurry ash removal structure of claim 1, wherein: the water inlet tank is arranged at the top of the clarification tank.
8. The ammonium sulfate slurry ash removal structure of claim 1, wherein: the filter press also comprises a pressure transmitter which is arranged on a liquid inlet pipeline of the plate-and-frame filter press.
9. The ammonium sulfate slurry ash removal structure of claim 1, wherein: the device also comprises a sludge interface instrument which is arranged on the clarifying tank.
10. The ammonium sulfate slurry ash removal structure of claim 4, wherein: the separation tube is thin at the top and thick at the bottom.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021099421.1U CN212594898U (en) | 2020-06-15 | 2020-06-15 | Ammonium sulfate slurry ash removal structure |
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| CN202021099421.1U CN212594898U (en) | 2020-06-15 | 2020-06-15 | Ammonium sulfate slurry ash removal structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111672288A (en) * | 2020-06-15 | 2020-09-18 | 中国联合工程有限公司 | Ammonium sulfate slurry ash removal structure and operation method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111672288A (en) * | 2020-06-15 | 2020-09-18 | 中国联合工程有限公司 | Ammonium sulfate slurry ash removal structure and operation method |
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