阅读说明：本技术 一种水泥厂新型智能窑灰脱硫系统 (Novel intelligent kiln dust desulfurization system of cement plant ) 是由 高超 杨鑫 唐薇薇 杨鹏 王硕 李淑跃 于 2019-11-06 设计创作，主要内容包括：本发明公开一种水泥厂新型智能窑灰脱硫系统,包括吸收装置、窑灰浆制备及供给装置、废气处理管道和窑灰库,以及设置于所述废气处理管道中的温度检测装置、压力检测装置、流体压差检测装置和气体成份分析装置；所述窑灰库与所述窑灰浆制备及供给装置的输入端连通,所述吸收装置的输入端分别与所述废气处理管道和所述窑灰浆制备及供给装置的输出端连通。上述方案在正常生产的情况下,能够实现水泥厂窑尾废气中SO2减排效率大于95％。同时结构简单,操作方便,适合推广应用。(The invention discloses a novel intelligent kiln dust desulfurization system for a cement plant, which comprises an absorption device, a kiln dust slurry preparation and supply device, a waste gas treatment pipeline, a kiln dust warehouse, a temperature detection device, a pressure detection device, a fluid pressure difference detection device and a gas component analysis device, wherein the temperature detection device, the pressure detection device, the fluid pressure difference detection device and the gas component analysis device are arranged in the waste gas treatment pipeline; the kiln ash storehouse is communicated with the input end of the kiln ash slurry preparation and supply device, and the input end of the absorption device is respectively communicated with the waste gas treatment pipeline and the output end of the kiln ash slurry preparation and supply device. According to the scheme, the emission reduction efficiency of SO2 in kiln tail waste gas of a cement plant can be more than 95% under the condition of normal production. Meanwhile, the structure is simple, the operation is convenient, and the device is suitable for popularization and application.)

1. A novel intelligent kiln dust desulfurization system of a cement plant is characterized by comprising an absorption device, a kiln dust slurry preparation and supply device, a waste gas treatment pipeline, a kiln dust warehouse, a temperature detection device, a pressure detection device, a fluid pressure difference detection device and a gas component analysis device, wherein the temperature detection device, the pressure detection device, the fluid pressure difference detection device and the gas component analysis device are arranged in the waste gas treatment pipeline;

the kiln ash storehouse is communicated with the input end of the kiln ash slurry preparation and supply device, and the input end of the absorption device is respectively communicated with the waste gas treatment pipeline and the output end of the kiln ash slurry preparation and supply device.

2. The system of claim 1, wherein the gas composition analyzer comprises: the sampling probe, the anti-blocking back-blowing device, the cooler and the gas composition instrument are connected in sequence;

the sampling probe samples the waste gas in the waste gas treatment pipeline, and the waste gas is cooled by the cooler and then subjected to component analysis by the gas component instrument;

and the probe anti-blocking back-blowing device is used for reversely blowing the sampling probe in the gas taking direction after the sampling action is finished.

3. The novel intelligent kiln dust desulfurization system of cement plant as claimed in claim 2, characterized in that, the exhaust gas treatment pipeline comprises: the system comprises a first waste gas treatment branch pipeline, a second waste gas treatment branch pipeline and a valve control device for controlling the first waste gas treatment branch pipeline and the second waste gas treatment branch pipeline;

the air inlets of the first waste gas treatment branch pipeline and the second waste gas treatment branch pipeline are respectively provided with a first electric regulating valve and a second electric regulating valve;

the first electric regulating valve and the second electric regulating valve are respectively connected with the gas composition instrument;

when the gas composition meter detects that the content of SO2 in the exhaust gas is lower than a set value, opening the first electric regulating valve and closing the second electric regulating valve SO that the exhaust gas enters the first exhaust gas treatment branch pipeline;

when the gas composition instrument detects that the content of SO2 in the exhaust gas is higher than a set value, the first electric regulating valve is closed, the second electric regulating valve is opened, and the exhaust gas enters the second exhaust gas treatment branch pipeline.

4. The system of claim 1, wherein the temperature detecting device comprises: a temperature sensor and a temperature transmitter;

the temperature sensor is used for detecting the temperature of the exhaust gas in the exhaust gas treatment pipeline;

the temperature transmitter is used for displaying the exhaust gas temperature detected by the temperature sensor;

the pressure detection device includes: the pressure sampling pipe and the pressure transmitter;

the pressure sampling pipe is used for detecting the pressure of the exhaust gas in the exhaust gas treatment pipeline;

the pressure transmitter is used for displaying the exhaust gas pressure detected by the pressure sampling pipe;

the fluid pressure difference detection device includes: a venturi tube and a differential pressure transmitter;

the Venturi tube is used for detecting the discharge amount of the waste gas in the waste gas treatment pipeline;

and the differential pressure transmitter is used for displaying the exhaust emission detected by the Venturi tube.

5. The system of claim 1, wherein the apparatus for preparing and supplying kiln mortar comprises: the device comprises a kiln dust weighing bin, a dust collector, a rotary feeding device, a kiln dust slurry prefabricated tank and a vertical slurry stirrer;

the kiln ash weighing bin is used for weighing kiln ash powder conveyed by the kiln ash bin, conveying the kiln ash powder into the kiln ash prefabricated tank, adding a proper amount of water according to a weighing result in a preset proportion, and stirring the mixture by the vertical slurry stirrer to prepare kiln ash slurry;

and the dust collector is used for absorbing the floating kiln dust in the kiln dust storage and conveying the kiln dust to the kiln dust slurry prefabricated tank again through the rotary feeding device for stirring treatment.

6. The novel intelligent kiln dust desulfurization system of cement plant as claimed in claim 1, characterized in that, said absorption device comprises: the device comprises an oxygen supply blower, a slurry supply pump, a side stirrer, an absorption tower, a slurry circulating pump, a gypsum discharge pump, an ultrasonic liquid level detector, a viscosity detector, a demister and a sprayer;

the input end of the sprayer is respectively connected with the output ends of the slurry supply pump and the slurry circulating pump;

the absorption tower comprises an absorption zone and a bottom circulation zone;

the absorption area is connected with the oxygen supply blower; the bottom circulating area is connected with the gypsum discharge pump;

and the ultrasonic liquid level detector and the viscosity detector which are arranged in the bottom circulation area are respectively used for detecting the height signal and the viscosity signal of the kiln dust slurry in the bottom circulation area.

7. The system of claim 3, wherein the SO of the waste gas entering the first waste gas treatment branch pipeline₂If the content is lower than the set value, the waste gas is directly discharged through the first waste gas treatment branch pipeline;

if entering the SO of the exhaust gas of the second exhaust gas treatment branch pipeline₂When the content is higher than the set value, the oxygen is supplied through the oxygen supplyAnd the blower sucks the waste gas in the second waste gas treatment branch pipeline into the absorption device for desulfurization treatment, and the waste gas subjected to desulfurization treatment is discharged from the top of the absorption tower until the waste gas meets the emission standard.

8. The novel intelligent kiln dust desulfurization system of cement plant as claimed in claim 6, further comprising: a gypsum preparation device connected to the gypsum discharge pump;

when the height signal and the viscosity signal of the kiln dust slurry reach the preset height value and viscosity value, the ultrasonic liquid level detector and the viscosity detector control the gypsum discharge pump to work, the kiln dust slurry is pumped out through the demister, the sprayer and the side stirrer arranged in the absorption zone, and the kiln dust slurry and the waste gas are mixed and then are sent into the gypsum preparation device.

9. The novel intelligent kiln dust desulfurization system of the cement plant as recited in claim 8, wherein the gypsum preparation device comprises a gypsum filter, a vacuum belt filter, a gas-liquid separator, a flushing water pump, a flushing water tank and a vacuum pump;

the output end of the gypsum liquid filter is connected with the input end of the vacuum belt filter;

the vacuum belt filter and the gas-liquid separator;

the outlet at the top of the gas-liquid separator is connected with the vacuum pump;

the outlet at the bottom of the gas-liquid separator is connected with the flushing water tank;

the flushing water pump is connected with the flushing water tank at the input end;

the output end of the flushing water tank is connected with a drying device.

10. The system for desulfurizing kiln dust in a cement plant according to claim 9, wherein the gypsum filter is used for filtering and separating the kiln dust slurry after being extracted and mixed with the exhaust gas for the first time;

the primary separated slurry enters the vacuum belt filter, and the gas-liquid separator performs gas-water separation on the primary separated slurry through the vacuum pump;

obtaining secondary separation slurry after the gas-water separation, and feeding the secondary separation slurry into the flushing water tank for flushing treatment; and drying the slurry subjected to the washing treatment of the washing water tank by the drying device to obtain a qualified filter cake.

Technical Field

The invention belongs to the technical field of cement plant production equipment and processes, and particularly relates to a novel intelligent kiln dust desulfurization system for a cement plant.

Background

According to the regulation of the emission standard of atmospheric pollutants in the cement industry, the maximum allowable emission concentration of SO2 in the exhaust emission standard of cement manufacturing enterprises is 200mg/m3, the requirement of key areas is lower than 100mg/m3, and some even zero emission is required. How to reduce the emission concentration of SO2 efficiently and economically becomes a difficult problem to be solved urgently.

The sulfur generated in the process of cement clinker sintering is carried by raw materials and fuels, most SO2 generated by the sulfur in the fuels is absorbed by active CaO in a decomposing furnace under normal conditions, SO2 in the flue gas discharged from the preheater mainly comes from elemental sulfur and low-valence flow in the raw materials, and the elemental sulfur and the low-valence flow are respectively oxidized into SO2 at a lower temperature.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a novel intelligent kiln dust desulfurization system for a cement plant, which is characterized in that intermediate kiln dust and water in the cement clinker sintering process are prepared into slurry according to a certain proportion to be used as an absorbent of an absorption tower in the desulfurization process of the cement plant, the slurry concentration is accurately controlled by adopting pH detection in a pulping system, the desulfurization efficiency reaches over 95 percent, the power consumption and the heat consumption of the system are reduced, and the desulfurization operation cost is saved, so that the problems of low efficiency and high operation cost of the conventional desulfurization system are solved.

The invention solves the technical problems by the following technical means:

a novel intelligent kiln dust desulfurization system for a cement plant comprises an absorption device, a kiln dust slurry preparation and supply device, a waste gas treatment pipeline, a kiln dust warehouse, a temperature detection device, a pressure detection device, a fluid pressure difference detection device and a gas component analysis device, wherein the temperature detection device, the pressure detection device, the fluid pressure difference detection device and the gas component analysis device are arranged in the waste gas treatment pipeline;

the kiln ash storehouse is communicated with the input end of the kiln ash slurry preparation and supply device, and the input end of the absorption device is respectively communicated with the waste gas treatment pipeline and the output end of the kiln ash slurry preparation and supply device.

Preferably, the gas component analyzing apparatus includes: the sampling probe, the anti-blocking back-blowing device, the cooler and the gas composition instrument are connected in sequence;

the sampling probe samples the waste gas in the waste gas treatment pipeline, and the waste gas is cooled by the cooler and then subjected to component analysis by the gas component instrument;

and the probe anti-blocking back-blowing device is used for reversely blowing the sampling probe in the gas taking direction after the sampling action is finished.

Further, the exhaust treatment conduit includes: the system comprises a first waste gas treatment branch pipeline, a second waste gas treatment branch pipeline and a valve control device for controlling the first waste gas treatment branch pipeline and the second waste gas treatment branch pipeline;

the air inlets of the first waste gas treatment branch pipeline and the second waste gas treatment branch pipeline are respectively provided with a first electric regulating valve and a second electric regulating valve;

the first electric regulating valve and the second electric regulating valve are respectively connected with the gas composition instrument;

when the gas composition meter detects that the content of SO2 in the exhaust gas is lower than a set value, opening the first electric regulating valve and closing the second electric regulating valve SO that the exhaust gas enters the first exhaust gas treatment branch pipeline;

when the gas composition instrument detects that the content of SO2 in the exhaust gas is higher than a set value, the first electric regulating valve is closed, the second electric regulating valve is opened, and the exhaust gas enters the second exhaust gas treatment branch pipeline.

Preferably, the temperature detection device includes: a temperature sensor and a temperature transmitter;

the temperature sensor is used for detecting the temperature of the exhaust gas in the exhaust gas treatment pipeline;

the temperature transmitter is used for displaying the exhaust gas temperature detected by the temperature sensor;

the pressure detection device includes: the pressure sampling pipe and the pressure transmitter;

the pressure sampling pipe is used for detecting the pressure of the exhaust gas in the exhaust gas treatment pipeline;

the pressure transmitter is used for displaying the exhaust gas pressure detected by the pressure sampling pipe;

the fluid pressure difference detection device includes: a venturi tube and a differential pressure transmitter;

the Venturi tube is used for detecting the discharge amount of the waste gas in the waste gas treatment pipeline;

and the differential pressure transmitter is used for displaying the exhaust emission detected by the Venturi tube.

Preferably, the kiln mortar preparing and feeding apparatus comprises: the device comprises a kiln dust weighing bin, a dust collector, a rotary feeding device, a kiln dust slurry prefabricated tank and a vertical slurry stirrer;

the kiln ash weighing bin is used for weighing kiln ash powder conveyed by the kiln ash bin, conveying the kiln ash powder into the kiln ash prefabricated tank, adding a proper amount of water according to a weighing result in a preset proportion, and stirring the mixture by the vertical slurry stirrer to prepare kiln ash slurry;

and the dust collector is used for absorbing the floating kiln dust in the kiln dust storage and conveying the kiln dust to the kiln dust slurry prefabricated tank again through the rotary feeding device for stirring treatment.

Preferably, the absorption means comprises: the device comprises an oxygen supply blower, a slurry supply pump, a side stirrer, an absorption tower, a slurry circulating pump, a gypsum discharge pump, an ultrasonic liquid level detector, a viscosity detector, a demister and a sprayer;

the input end of the sprayer is respectively connected with the output ends of the slurry supply pump and the slurry circulating pump;

the absorption tower comprises an absorption zone and a bottom circulation zone;

the absorption area is connected with the oxygen supply blower; the bottom circulating area is connected with the gypsum discharge pump;

and the ultrasonic liquid level detector and the viscosity detector which are arranged in the bottom circulation area are respectively used for detecting the height signal and the viscosity signal of the kiln dust slurry in the bottom circulation area.

Go toStep one, if the SO of the exhaust gas entering the first exhaust gas treatment branch pipe₂If the content is lower than the set value, the waste gas is directly discharged through the first waste gas treatment branch pipeline;

if entering the SO of the exhaust gas of the second exhaust gas treatment branch pipeline₂And when the content is higher than the set value, the oxygen supply blower sucks the waste gas in the second waste gas treatment branch pipeline into the absorption device for desulfurization treatment, and the desulfurized waste gas is discharged from the top of the absorption tower until the desulfurized waste gas meets the emission standard.

Further, a novel intelligent kiln dust desulfurization system of cement plant still includes: a gypsum preparation device connected to the gypsum discharge pump;

when the height signal and the viscosity signal of the kiln dust slurry reach the preset height value and viscosity value, the ultrasonic liquid level detector and the viscosity detector control the gypsum discharge pump to work, the kiln dust slurry is pumped out through the demister, the sprayer and the side stirrer arranged in the absorption zone, and the kiln dust slurry and the waste gas are mixed and then are sent into the gypsum preparation device.

Further, the gypsum preparation device comprises a gypsum filter, a vacuum belt filter, a gas-liquid separator, a flushing water pump, a flushing water tank and a vacuum pump;

the output end of the gypsum liquid filter is connected with the input end of the vacuum belt filter;

the vacuum belt filter and the gas-liquid separator;

the outlet at the top of the gas-liquid separator is connected with the vacuum pump;

the outlet at the bottom of the gas-liquid separator is connected with the flushing water tank;

the flushing water pump is connected with the flushing water tank at the input end;

the output end of the flushing water tank is connected with a drying device.

Further, the gypsum filter is used for carrying out primary filtration and separation on the extracted kiln dust slurry mixed with the waste gas;

the primary separated slurry enters the vacuum belt filter, and the gas-liquid separator performs gas-water separation on the primary separated slurry through the vacuum pump;

obtaining secondary separation slurry after the gas-water separation, and feeding the secondary separation slurry into the flushing water tank for flushing treatment; and drying the slurry subjected to the washing treatment of the washing water tank by the drying device to obtain a qualified filter cake.

The invention has the beneficial effects that:

the invention provides a novel intelligent kiln dust desulfurization system for a cement plant by combining the actual situation of the cement plant, wherein the intermediate product kiln dust calcined by cement clinker and water are prepared into slurry according to a certain proportion to be used as an absorbent of an absorption tower in the desulfurization process of the cement plant, the concentration of the slurry is accurately controlled by adopting PH detection in a pulping system, the desulfurization efficiency reaches over 95 percent, the power consumption and the heat consumption of the system are reduced, and the desulfurization operation cost is saved, so that the problems of low efficiency and high operation cost of the traditional desulfurization system are solved.

The system has the advantages of simple structure, low operation energy consumption, high desulfurizer utilization rate, no need of consuming a large amount of water resources and high desulfurization efficiency. The system reduces SO2 in the waste gas of the cement plant, directly utilizes kiln dust, does not need to purchase a desulfurizing agent additionally, and simultaneously, the accessory product gypsum in the desulfurization process can also be used as a mixed material of a cement grinding working section, thereby effectively saving space and equipment investment and reducing production cost.

Drawings

In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a schematic structural diagram of a novel intelligent kiln dust desulfurization system of a cement plant provided by the invention;

the system comprises a kiln ash bin 1, a rotary feeder 2, a dust collector 3, a kiln ash slurry prefabricated tank 4, a slurry supply pump 5, a first electric regulating valve 6, a second electric regulating valve 7, a side stirrer 8, an absorption tower 9, a spray thrower 10, a demister 11, a slurry circulating pump 12, a gypsum discharge pump 13, a process water pump 14, a filter cloth flushing pump 15, a process water tank 16, a filter tank 17, a vacuum belt filter 18, a gas-liquid separator 19, a vacuum pump 20, a hydraulic cyclone 21, a filter liquid pump 22, an oxygen supply blower 23 and a vertical slurry stirrer 24.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

In order to specifically understand the technical solutions provided by the present invention, the technical solutions of the present invention will be described and illustrated in detail in the following examples. It is apparent that the embodiments provided by the present invention are not limited to the specific details familiar to those skilled in the art. The following detailed description of the preferred embodiments of the invention is intended to provide further embodiments of the invention in addition to those described herein.

As shown in fig. 1, the embodiment of the present invention relates to a novel intelligent kiln dust desulfurization system for a cement plant, which comprises an absorption device, a kiln dust slurry preparation and supply device, a waste gas treatment pipeline, a kiln dust warehouse, a temperature detection device, a pressure detection device, a fluid pressure difference detection device and a gas component analysis device, wherein the temperature detection device, the pressure detection device, the fluid pressure difference detection device and the gas component analysis device are arranged in the waste gas treatment pipeline;

the kiln ash storehouse is communicated with the input end of the kiln ash slurry preparation and supply device, and the input end of the absorption device is respectively communicated with the waste gas treatment pipeline and the output end of the kiln ash slurry preparation and supply device.

The gas component analyzing apparatus includes: the sampling probe, the anti-blocking back-blowing device, the cooler and the gas composition instrument are connected in sequence;

the sampling probe samples the waste gas in the waste gas treatment pipeline, and the waste gas is cooled by the cooler and then subjected to component analysis by the gas component instrument;

and the probe anti-blocking back-blowing device is used for reversely blowing the sampling probe in the gas taking direction after the sampling action is finished.

The exhaust gas treatment pipe includes: the system comprises a first waste gas treatment branch pipeline, a second waste gas treatment branch pipeline and a valve control device for controlling the first waste gas treatment branch pipeline and the second waste gas treatment branch pipeline;

the air inlets of the first waste gas treatment branch pipeline and the second waste gas treatment branch pipeline are respectively provided with a first electric regulating valve and a second electric regulating valve;

the first electric regulating valve and the second electric regulating valve are respectively connected with the gas composition instrument;

when the gas composition meter detects that the content of SO2 in the exhaust gas is lower than a set value, opening the first electric regulating valve and closing the second electric regulating valve SO that the exhaust gas enters the first exhaust gas treatment branch pipeline;

when the gas composition instrument detects that the content of SO2 in the exhaust gas is higher than a set value, the first electric regulating valve is closed, the second electric regulating valve is opened, and the exhaust gas enters the second exhaust gas treatment branch pipeline.

The temperature detection device includes: a temperature sensor and a temperature transmitter;

the temperature sensor is used for detecting the temperature of the exhaust gas in the exhaust gas treatment pipeline;

the temperature transmitter is used for displaying the exhaust gas temperature detected by the temperature sensor;

the pressure detection device includes: the pressure sampling pipe and the pressure transmitter;

the pressure sampling pipe is used for detecting the pressure of the exhaust gas in the exhaust gas treatment pipeline;

the pressure transmitter is used for displaying the exhaust gas pressure detected by the pressure sampling pipe;

the fluid pressure difference detection device includes: a venturi tube and a differential pressure transmitter;

the Venturi tube is used for detecting the discharge amount of the waste gas in the waste gas treatment pipeline;

and the differential pressure transmitter is used for displaying the exhaust emission detected by the Venturi tube.

The kiln mortar preparing and feeding apparatus includes: the device comprises a kiln dust weighing bin, a dust collector, a rotary feeding device, a kiln dust slurry prefabricated tank and a vertical slurry stirrer;

the kiln ash weighing bin is used for weighing kiln ash powder conveyed by the kiln ash bin, conveying the kiln ash powder into the kiln ash prefabricated tank, adding a proper amount of water according to a weighing result in a preset proportion, and stirring the mixture by the vertical slurry stirrer to prepare kiln ash slurry;

and the dust collector is used for absorbing the floating kiln dust in the kiln dust storage and conveying the kiln dust to the kiln dust slurry prefabricated tank again through the rotary feeding device for stirring treatment.

The absorption device includes: the device comprises an oxygen supply blower, a slurry supply pump, a side stirrer, an absorption tower, a slurry circulating pump, a gypsum discharge pump, an ultrasonic liquid level detector, a viscosity detector, a demister and a sprayer;

the input end of the sprayer is respectively connected with the output ends of the slurry supply pump and the slurry circulating pump;

the absorption tower comprises an absorption zone and a bottom circulation zone;

the absorption area is connected with the oxygen supply blower; the bottom circulating area is connected with the gypsum discharge pump;

and the ultrasonic liquid level detector and the viscosity detector which are arranged in the bottom circulation area are respectively used for detecting the height signal and the viscosity signal of the kiln dust slurry in the bottom circulation area.

If entering the SO of the exhaust gas of the first exhaust gas treatment branch pipeline₂If the content is lower than the set value, the waste gas is directly discharged through the first waste gas treatment branch pipeline;

if entering the SO of the exhaust gas of the second exhaust gas treatment branch pipeline₂And when the content is higher than the set value, the oxygen supply blower sucks the waste gas in the second waste gas treatment branch pipeline into the absorption device for desulfurization treatment, and the desulfurized waste gas is discharged from the top of the absorption tower until the desulfurized waste gas meets the emission standard.

In addition, the novel intelligent kiln dust desulfurization system for the cement plant also comprises a gypsum preparation device connected with the gypsum discharge pump; when the height signal and the viscosity signal of the kiln dust slurry reach the preset height value and viscosity value, the ultrasonic liquid level detector and the viscosity detector control the gypsum discharge pump to work, the kiln dust slurry is pumped out through the demister, the sprayer and the side stirrer arranged in the absorption zone, and the kiln dust slurry and the waste gas are mixed and then are sent into the gypsum preparation device.

The gypsum preparation device comprises a gypsum filter, a vacuum belt filter, a gas-liquid separator, a flushing water pump, a flushing water tank and a vacuum pump;

the output end of the gypsum liquid filter is connected with the input end of the vacuum belt filter;

the vacuum belt filter and the gas-liquid separator;

the outlet at the top of the gas-liquid separator is connected with the vacuum pump;

the outlet at the bottom of the gas-liquid separator is connected with the flushing water tank;

the flushing water pump is connected with the flushing water tank at the input end;

the output end of the flushing water tank is connected with a drying device.

The gypsum liquid filter is used for carrying out primary filtration and separation on the extracted kiln dust slurry mixed with the waste gas;

the primary separated slurry enters the vacuum belt filter, and the gas-liquid separator performs gas-water separation on the primary separated slurry through the vacuum pump;

obtaining secondary separation slurry after the gas-water separation, and feeding the secondary separation slurry into the flushing water tank for flushing treatment; and drying the slurry subjected to the washing treatment of the washing water tank by the drying device to obtain a qualified filter cake.