CN112755776A - Limestone and gypsum long-distance conveying and processing system for wet desulphurization of power plant - Google Patents
Limestone and gypsum long-distance conveying and processing system for wet desulphurization of power plant Download PDFInfo
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- CN112755776A CN112755776A CN202011503289.0A CN202011503289A CN112755776A CN 112755776 A CN112755776 A CN 112755776A CN 202011503289 A CN202011503289 A CN 202011503289A CN 112755776 A CN112755776 A CN 112755776A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/30—Methods or devices for filling or emptying bunkers, hoppers, tanks, or like containers, of interest apart from their use in particular chemical or physical processes or their application in particular machines, e.g. not covered by a single other subclass
- B65G65/32—Filling devices
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Abstract
The invention relates to a limestone and gypsum long-distance conveying and processing system for wet desulphurization of a power plant, which comprises a feeding and discharging area, an auxiliary area subsystem for preparing limestone slurry and dehydrating gypsum slurry, a transfer area subsystem for temporarily storing the limestone slurry and the gypsum slurry, and a long-distance conveying belt component for conveying materials between the feeding and discharging area and the auxiliary area subsystem, wherein one side of the long-distance conveying belt component is arranged at the feeding and discharging area, and the other side of the long-distance conveying belt component is arranged at the auxiliary area subsystem. Compared with the prior art, the invention effectively improves the conveying and processing efficiency of limestone and gypsum, reduces the transportation cost, improves the preparation efficiency of limestone slurry and the dehydration efficiency of gypsum slurry of wet desulphurization in a power plant, and improves the reliability and the stability of a wet desulphurization system.
Description
Technical Field
The invention relates to the field of wet desulphurization of power plants, in particular to a limestone and gypsum long-distance conveying and processing system for wet desulphurization of power plants.
Background
Power stations and industrial boilers typically employ fossil fuels, such as coal and oil. Since these fossil fuels generally contain sulfur components, harmful substances such as sulfur dioxide are generated during combustion. In order to reduce the flue gas pollution of the coal-fired power plant, wet desulphurization is usually adopted to carry out desulphurization treatment on the flue gas, and the limestone-gypsum wet desulphurization method in the wet desulphurization process has mature process, reliable operation, simple operation and high desulphurization efficiency, is suitable for various coal types, and can recycle the byproduct gypsum, thereby being widely applied to the coal-fired power plant and accounting for about 90 percent of the capacity of the installed flue gas desulphurization unit. The wet desulphurization system adopts the configuration of an absorption tower and a boiler to carry out flue gas treatment.
The limestone-gypsum wet desulfurization method requires that limestone slurry is prepared from limestone and sent into an absorption tower for desulfurization, and then gypsum slurry discharged from the absorption tower is dehydrated. The limestone slurry preparation facility and the gypsum slurry dehydration facility of the existing coal-fired power plant are both directly arranged near the power plant, limestone needs to be conveyed in and gypsum needs to be conveyed out by road transportation, limestone slurry is supplied for an absorption tower, the transportation cost is high, and the production capacity and the transportation capacity are limited by more factors.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a limestone and gypsum long-distance conveying and processing system for wet desulphurization in a power plant.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides a lime stone, gypsum long distance transport processing system for power plant's wet flue gas desulfurization, including last unloading district, be used for carrying out the supplementary district subsystem of lime stone thick liquid preparation and gypsum thick liquid dehydration, be used for keeping in the transfer district subsystem of lime stone thick liquid, gypsum thick liquid and be used for the long distance conveyer belt subassembly of material transmission between last unloading district and supplementary district subsystem, one side of long distance conveyer belt subassembly locate last unloading district department, supplementary district subsystem department is located to the opposite side.
Preferably, the auxiliary area subsystem comprises a limestone slurry preparation assembly and a gypsum slurry dewatering assembly, the limestone slurry preparation assembly comprises a limestone storage bin, a limestone pulping device and an auxiliary area limestone slurry tank, and the gypsum slurry dewatering assembly comprises an auxiliary area gypsum slurry tank, a gypsum dewatering device and a gypsum storage bin.
Preferably, long distance transport belt assembly include two-way conveyer belt, limestone conveying belt and gypsum conveyer belt, one side of two-way conveyer belt locate and go up unloading district department, the opposite side respectively with the initiating terminal of limestone conveying belt and the end-to-end connection of gypsum conveyer belt, the end of limestone conveying belt locate on the limestone storage storehouse, the initiating terminal of gypsum conveyer belt locate gypsum repository department.
Preferably, the tail end of the limestone conveying belt is provided with a plow discharger used for conveying limestone on the limestone conveying belt into the limestone storage bin.
Preferably, the transfer area subsystem include transfer area lime stone thick liquid case and transfer area gypsum thick liquid case, supplementary district lime stone thick liquid case pass through the pipeline intercommunication with transfer area lime stone thick liquid case, supplementary district gypsum thick liquid case pass through the pipeline intercommunication with transfer area gypsum thick liquid case.
Preferably, the transfer zone subsystem further comprises a transfer zone gypsum slurry pump, and the transfer zone gypsum slurry pump is arranged on a pipeline between the transfer zone gypsum slurry tank and the auxiliary zone gypsum slurry tank.
Preferably, the transfer area subsystem further comprises a transfer area limestone slurry pump, and the transfer area limestone slurry pump is arranged on an outlet pipeline of the transfer area limestone slurry tank.
Preferably, the number of the transfer area limestone slurry tanks in the transfer area subsystem is more than or equal to 2, and the number of the transfer area gypsum slurry tanks in the transfer area subsystem is more than or equal to 2.
Preferably, the limestone slurry preparation assembly comprises three limestone silos and three limestone slurry preparation devices, and the gypsum slurry dewatering assembly comprises three gypsum dewatering devices.
Preferably, the number of auxiliary area limestone slurry tanks in the limestone slurry preparation assembly is greater than or equal to 2, and the number of auxiliary area gypsum slurry tanks in the gypsum slurry dewatering assembly is greater than or equal to 2.
Preferably, the length of the bidirectional conveying belt is 100 meters, and the length of the gypsum conveying belt and the length of the limestone conveying belt are one thousand meters.
Compared with the prior art, the invention has the following advantages:
(1) the long-distance conveyor belt assembly, the auxiliary area subsystem and the transit area subsystem are matched, so that limestone and gypsum are supplied to the power plant and delivered out by utilizing the feeding and discharging area which is far away from the power plant, the conveying and processing efficiency of the limestone and the gypsum is effectively improved, the transportation cost is reduced, the limestone slurry preparation and gypsum slurry dehydration efficiency of the wet desulphurization of the power plant are improved, and the reliability and the stability of a wet desulphurization system are improved;
(2) the auxiliary area subsystem and the transit area subsystem for preparing limestone slurry and dehydrating the gypsum slurry are separately arranged, so that the long-distance conveying of materials is further facilitated, the auxiliary area subsystem performs the processes of pulping and dehydrating, and the transit area subsystem is responsible for the transit storage of the limestone slurry and the gypsum slurry, so that the stability of liquid consumption and drainage of the absorption tower is improved;
(3) the quantity of the limestone slurry tanks and the gypsum slurry tanks in the transit area of the transit area subsystem is more than or equal to two, so that the storage redundancy of liquid supply and liquid discharge is effectively realized, the reserve capacity is improved, the system halt caused by equipment failure is prevented, and the reliability and the stability of the system are improved;
(4) according to the invention, the number of auxiliary area limestone slurry tanks in the limestone slurry preparation assembly is more than or equal to 2, and the number of auxiliary area gypsum slurry tanks in the gypsum slurry dehydration assembly is more than or equal to 2, so that system halt caused by equipment failure is prevented, and the reliability and stability of the system are improved;
(5) the limestone slurry preparation assembly comprises three limestone storage bins and three limestone slurry preparation devices, and the gypsum slurry dehydration assembly comprises three gypsum dehydration devices, so that limestone slurry preparation amount and gypsum dehydration amount are ensured, and limestone slurry supply of the absorption tower and treatment of gypsum slurry discharged from the absorption tower are effectively ensured.
Drawings
FIG. 1 is a schematic structural view of the long haul conveyor belt assembly of the present invention;
FIG. 2 is a schematic illustration of the limestone slurry preparation assembly of the present invention;
FIG. 3 is a schematic diagram of the gypsum slurry dewatering assembly of the present invention;
fig. 4 is a schematic structural diagram of a staging area subsystem according to the present invention.
Wherein, 1, a loading and unloading area, 2, a bidirectional conveyer belt, 3, a gypsum conveyer belt, 4, a limestone conveyer belt, 5, a gypsum storage warehouse, 6, a limestone storage bin, 7, a limestone pulping device, 8, a gypsum dewatering device, 9, an auxiliary area limestone slurry box, 10, an auxiliary area gypsum slurry box, 11, a transit area limestone slurry box, 12, a transit area gypsum slurry box, 13, a plow discharger, 14, a bin top dust remover, 15, a transit area gypsum slurry pump, 16, a transit area limestone slurry pump, 17, an auxiliary area limestone slurry pump, 18, a mill slurry pump, 19, a mill circulation box, 20, a gypsum cyclone station, 21, an auxiliary area gypsum slurry pump, 22, a vacuum belt dehydrator, 23, a gypsum washing water pump, 24, a filter cake washing water tank, 25, a gas-liquid separator, 26, a vacuum pump, 27, a filtrate water tank, 28, a filtrate water pump, 29. the device comprises a distribution pump, 30, a filter cloth flushing water tank, 31, a process water pump, 32, a filter cloth flushing pump, 33, a wet ball mill, 34, a belt weighing feeder, 35, a limestone slurry cyclone, 36 and a distribution tank.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. Note that the following description of the embodiments is merely a substantial example, and the present invention is not intended to be limited to the application or the use thereof, and is not limited to the following embodiments.
Examples
The utility model provides a lime stone, gypsum long distance transport processing system for power plant's wet flue gas desulfurization, is including going up unloading district 1, the supplementary district subsystem that is used for carrying on lime stone thick liquid preparation and gypsum thick liquid dehydration, the transfer district subsystem that is used for temporarily storing lime stone thick liquid, gypsum thick liquid and the long distance conveyer belt subassembly that is used for going up between unloading district 1 and the supplementary district subsystem material transmission, unloading district 1 department is located to one side of long distance conveyer belt subassembly, supplementary district subsystem department is located to the opposite side.
Specifically, as shown in fig. 1 and 2, the auxiliary zone subsystem of the present invention comprises a limestone slurry preparation assembly comprising a limestone silo 6, a limestone pulping apparatus 7 and an auxiliary zone limestone slurry tank 9, and a gypsum slurry dewatering assembly comprising an auxiliary zone gypsum slurry tank 10, a gypsum dewatering apparatus 8 and a gypsum storage 5.
In this embodiment, an outlet pipeline of the auxiliary area limestone slurry tank 9 is provided with an auxiliary area limestone slurry pump 17, and an outlet pipeline of the auxiliary area gypsum slurry tank 10 is provided with an auxiliary area gypsum slurry pump 21. In order to prevent that equipment damage from resulting in the system to shut down, improve redundancy, auxiliary area limestone slurry case 9 is equipped with two outlet pipe, all is equipped with auxiliary area limestone slurry pump 17 on the outlet pipe, and auxiliary area gypsum slurry case 10 is equipped with two outlet pipe, all is equipped with auxiliary area gypsum slurry pump 21 on the outlet pipe.
As shown in fig. 1, correspondingly, the long-distance conveying belt assembly comprises a bidirectional conveying belt 2, a limestone conveying belt 4 and a gypsum conveying belt 3, wherein one side of the bidirectional conveying belt 2 is arranged at the position of the feeding and discharging area 1, the other side of the bidirectional conveying belt is respectively connected with the starting end of the limestone conveying belt 4 and the tail end of the gypsum conveying belt 3, the tail end of the limestone conveying belt 4 is arranged on a limestone storage bin 6, and the starting end of the gypsum conveying belt 3 is arranged at the position of a gypsum storage bin.
In this embodiment, two-way conveyer belt 2 is sent the limestone to in last unloading district 1, and the limestone sends into limestone storage 6 through two-way conveyer belt 2, limestone conveyer belt 4, sends gypsum conveyer belt 3 in gypsum repository 5, and the gypsum sends to last unloading district 1 through gypsum conveyer belt 3, two-way conveyer belt 2. The unloading district 1 of going up in this embodiment is unloading district on boats and ships pier, and the power of transportation is strong, and the cost of transportation is low. In this embodiment, the length of the bidirectional conveyor belt 2 is about 100 meters, and the lengths of the gypsum conveyor belt 3 and the limestone conveyor belt 4 are about one kilometer.
In order to facilitate the transportation of the limestone, in this embodiment, the end of the limestone conveying belt 4 is provided with a plow discharger 13 for feeding the limestone on the limestone conveying belt 4 into the limestone storage bin 6. And a top dust remover 14 is arranged on the limestone storage bin 6.
As shown in fig. 4, the transit zone subsystem includes a transit zone limestone slurry tank 11 and a transit zone gypsum slurry tank 12, the auxiliary zone limestone slurry tank 9 is communicated with the transit zone limestone slurry tank 11 through a pipeline, and the auxiliary zone gypsum slurry tank 10 is communicated with the transit zone gypsum slurry tank 12 through a pipeline. The transfer area subsystem further comprises a transfer area gypsum slurry pump 15 and a transfer area limestone slurry pump 16, wherein the transfer area gypsum slurry pump 15 is arranged on a pipeline between the transfer area gypsum slurry tank 12 and the auxiliary area gypsum slurry tank 10, and the transfer area limestone slurry pump 16 is arranged on an outlet pipeline of the transfer area limestone slurry tank 11.
For the use of a power plant, an outlet pipeline of the limestone slurry tank 11 in the transit zone is communicated with an inlet pipeline of the absorption tower, and an inlet pipeline of the gypsum slurry tank 12 in the transit zone is communicated with an outlet pipeline of the absorption tower.
In order to realize the storage and use redundancy of limestone slurry and gypsum slurry and improve the stability of the system, the number of the limestone slurry tanks 11 in the transfer area subsystem is more than or equal to 2, and the number of the gypsum slurry tanks 12 in the transfer area subsystem is more than or equal to 2. Similarly, the number of auxiliary zone limestone slurry tanks 9 in the limestone slurry preparation assembly is equal to or greater than 2 and the number of auxiliary zone gypsum slurry tanks 10 in the gypsum slurry dewatering assembly is equal to or greater than 2.
In this embodiment, as shown in fig. 4, the transfer area subsystem is provided with two transfer area limestone slurry tanks 11 and two transfer area gypsum slurry tanks 12, and the limestone slurry preparation assembly includes two auxiliary area limestone slurry tanks 9 and two auxiliary area gypsum slurry tanks 10.
In this embodiment, in order to improve limestone pulping ability and gypsum dewatering ability and ensure that system pulping total amount and dewatering total amount are redundant, the limestone slurry preparation assembly includes three limestone storage silos 6 and three limestone slurry preparation devices, and the gypsum slurry dewatering assembly includes three gypsum dewatering devices 8.
Specifically, in this embodiment, as shown in fig. 2, the limestone slurry preparing apparatus 7 includes a belt weigher 34, a wet ball mill 33, a mill circulation box 19, a mill circulation pump 18 provided on an outlet pipe of the mill circulation box 19, a limestone slurry cyclone 35, and a distribution box 36, limestone is fed from the limestone storage 6 to the belt weigher 34, then fed to the wet ball mill 33, the mill circulation box 19, and the distribution box 36 in this order, and prepared limestone slurry is fed from the distribution box 36 to the auxiliary area limestone slurry tank 9.
In this embodiment, as shown in fig. 3, the gypsum dewatering device 8 includes a gypsum cyclone station 20, a vacuum belt dewatering machine 22, a gas-liquid separator 25, a vacuum pump 26, a filtrate water tank 27, a filter cloth flushing water tank 30, and a filter cake flushing water tank 24, gypsum slurry is sent into the gypsum cyclone station 20 from the gypsum slurry tank 10 of the auxiliary area, then sent into the vacuum belt dewatering machine 22 for dewatering treatment, and then sent into the gypsum storage 5, in other structures of the gypsum dewatering device, a gypsum flushing water pump 23 is arranged on a water outlet pipeline of the filter cake flushing water tank 24, a water outlet pipeline of the filtrate water tank 27 is communicated with the mill circulation tank 19 through the filter liquid water pump 28, and is communicated with the limestone slurry tank 9 of the auxiliary area through a distribution pump 29, and the filter cloth flushing water tank 30 is communicated with a pipeline through a process water pump.
When the invention is used, limestone is sent to the bidirectional conveyer belt 2 in the feeding and discharging area 1, is sent to the limestone storage bin 6 through the bidirectional conveyer belt 2 and the limestone conveyer belt 4 and is subjected to pulping treatment by the limestone pulping device 7 to prepare limestone slurry which is sent to the limestone slurry tank 9 in the auxiliary area and is pumped into the limestone slurry tank 11 in the transit area and is stored in the limestone slurry tank 11 in the transit area, and when the power plant needs to use the limestone slurry, the limestone slurry is pumped into the absorption tower from the limestone slurry tank 11 in the transit area; the discharged gypsum slurry of absorption tower is sent into transfer district gypsum slurry case 12, then pumps into auxiliary area gypsum slurry case 10, sends into gypsum dewatering device 8 and carries out the gypsum dehydration, obtains the gypsum and sends into in the gypsum repository 5, and the gypsum passes through gypsum conveyer belt 3, two-way conveyer belt 2 and sends to last unloading district 1.
The above embodiments are merely examples and do not limit the scope of the present invention. These embodiments may be implemented in other various manners, and various omissions, substitutions, and changes may be made without departing from the technical spirit of the present invention.
Claims (10)
1. The utility model provides a lime stone, gypsum long distance transport processing system for power plant's wet flue gas desulfurization, its characterized in that, including last unloading district (1), be used for carrying on the supplementary district subsystem of lime stone thick liquid preparation and gypsum thick liquid dehydration, be used for keeping in the transfer district subsystem of lime stone thick liquid, gypsum thick liquid and be used for going up the long distance conveyer belt subassembly of unloading material transmission between district (1) and the supplementary district subsystem, one side of long distance conveyer belt subassembly locate and go up unloading district (1) department, supplementary district subsystem department is located to the opposite side.
2. A limestone and gypsum long haul handling system for wet desulphurization of power plant according to claim 1, characterized in that the auxiliary area subsystem comprises a limestone slurry preparation assembly comprising a limestone storage silo (6), a limestone pulping device (7) and an auxiliary area limestone slurry tank (9) and a gypsum slurry dewatering assembly comprising an auxiliary area gypsum slurry tank (10), a gypsum dewatering device (8) and a gypsum storage silo (5).
3. The limestone and gypsum long-distance conveying and processing system for the wet desulphurization of the power plant as claimed in claim 2, wherein the long-distance conveying belt component comprises a bidirectional conveying belt (2), a limestone conveying belt (4) and a gypsum conveying belt (3), one side of the bidirectional conveying belt (2) is arranged at the feeding and discharging area (1), the other side of the bidirectional conveying belt is respectively connected with the starting end of the limestone conveying belt (4) and the tail end of the gypsum conveying belt (3), the tail end of the limestone conveying belt (4) is arranged on the limestone storage bin (6), and the starting end of the gypsum conveying belt (3) is arranged at the gypsum storage bin (5).
4. The limestone and gypsum long-distance conveying processing system for the wet desulphurization of the power plant as set forth in claim 3, characterized in that the tail end of the limestone conveying belt (4) is provided with a plow discharger (13) for feeding the limestone on the limestone conveying belt (4) into the limestone storage bin (6).
5. The limestone and gypsum long-distance conveying and processing system for the wet desulphurization of the power plant as set forth in claim 2, wherein the transit subsystem comprises a transit limestone slurry tank (11) and a transit gypsum slurry tank (12), the auxiliary limestone slurry tank (9) is communicated with the transit limestone slurry tank (11) through a pipeline, and the auxiliary gypsum slurry tank (10) is communicated with the transit gypsum slurry tank (12) through a pipeline.
6. The limestone and gypsum long-distance transportation and treatment system for wet desulphurization in power plant as claimed in claim 5, wherein the transfer area subsystem further comprises a transfer area gypsum slurry pump (15), and the transfer area gypsum slurry pump (15) is arranged on the pipeline between the transfer area gypsum slurry tank (12) and the auxiliary area gypsum slurry tank (10).
7. The long distance limestone and gypsum transport and processing system for wet desulphurization in power plant as claimed in claim 5, characterized in that the transfer area subsystem further comprises a transfer area limestone slurry pump (16), and the transfer area limestone slurry pump (16) is arranged on the outlet pipeline of the transfer area limestone slurry tank (11).
8. The limestone and gypsum long-distance transportation and treatment system for the wet desulphurization of the power plant as set forth in claim 5, characterized in that the number of the transfer area limestone slurry tanks (11) in the transfer area subsystem is greater than or equal to 2, and the number of the transfer area gypsum slurry tanks (12) in the transfer area subsystem is greater than or equal to 2.
9. The limestone and gypsum long distance transport processing system for wet desulphurization in power plant according to claim 2, characterized in that the limestone slurry preparation assembly comprises three limestone silos (6) and three limestone slurry preparation devices, and the gypsum slurry dewatering assembly comprises three gypsum dewatering devices (8).
10. The limestone and gypsum long distance transport processing system for wet desulphurization in power plant as claimed in claim 2, characterized in that the number of auxiliary area limestone slurry tanks (9) in the limestone slurry preparation assembly is 2 or more, and the number of auxiliary area gypsum slurry tanks (10) in the gypsum slurry dewatering assembly is 2 or more.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011503289.0A CN112755776A (en) | 2020-12-18 | 2020-12-18 | Limestone and gypsum long-distance conveying and processing system for wet desulphurization of power plant |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011503289.0A CN112755776A (en) | 2020-12-18 | 2020-12-18 | Limestone and gypsum long-distance conveying and processing system for wet desulphurization of power plant |
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| CN112755776A true CN112755776A (en) | 2021-05-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113713914A (en) * | 2021-08-30 | 2021-11-30 | 华能国际电力股份有限公司上海石洞口第一电厂 | Wet limestone pulping system based on density distribution |
-
2020
- 2020-12-18 CN CN202011503289.0A patent/CN112755776A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113713914A (en) * | 2021-08-30 | 2021-11-30 | 华能国际电力股份有限公司上海石洞口第一电厂 | Wet limestone pulping system based on density distribution |
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