阅读说明：本技术 一种循环液沉降系统 (Circulating liquid sedimentation system ) 是由 张佳谋 袁宏奎 靳国强 于 2019-09-05 设计创作，主要内容包括：本发明提供了一种循环液沉降系统,属于水循环再利用技术,该系统包括安装在除尘塔上的外部管路和一侧的综合沉淀池,综合沉淀池包括沉淀池和集水池,本发明在不改动现有旋流除尘塔现结构的情况下,增加了循环液沉降系统,该系统依靠湿法除尘原有的循环水泵作为提升,后端依靠重力自流至旋流塔循环水箱再次回用,实现废水净化、节约水资源消耗的同时,不新增动力设施,适用于现有旋流除尘塔的改良。(The invention provides a circulating liquid sedimentation system, which belongs to the water circulation recycling technology and comprises an external pipeline arranged on a dedusting tower and a comprehensive sedimentation tank arranged on one side, wherein the comprehensive sedimentation tank comprises a sedimentation tank and a water collection tank.)

1. The utility model provides a circulating liquid sedimentation system, its characterized in that, is including installing outside pipeline and the comprehensive sedimentation tank (201) of one side on gas wash tower (1), outside pipeline includes first pipeline (101), second pipeline (102), first tee bend (103), third pipeline (104), second tee bend (105), fourth pipeline (106) and fifth pipeline (108), comprehensive sedimentation tank (201) is including sedimentation tank (201) and water catch basin (202), wherein:

one end of the first pipeline (101) is connected with a water inlet of the dust removing tower (1), the other end of the first pipeline (101) is connected with a first end of a first tee joint (103), and a ball valve or an electromagnetic valve is arranged on the first pipeline (101);

one end of the second pipeline (102) is connected with a water return port of the dust removal tower (1), the other end of the second pipeline (102) is connected with a second end of the first tee joint (103), and a ball valve or an electromagnetic valve is arranged on the second pipeline (102);

one end of a third pipeline (104) is connected with the third end of the first tee joint (103), the other end of the third pipeline (104) is connected with the output end of a circulating pump (107) for the dust removal tower (1), the input end of the circulating pump (107) is arranged inside a circulating water tank (109) for the dust removal tower (1), and a ball valve or an electromagnetic valve is arranged on the third pipeline (104);

the second tee joint (105) is installed on the third pipeline (104), one end of the fourth pipeline (106) is communicated with the third pipeline (104) through the second tee joint (105), the other end of the fourth pipeline (106) is communicated with the sedimentation tank (201) of the comprehensive sedimentation tank (201), and a ball valve or an electromagnetic valve is arranged on the fourth pipeline (106);

one end of a fifth pipeline (108) is connected with a water collecting tank (202) of the comprehensive sedimentation tank (201), the other end of the fifth pipeline (108) is connected with a circulating water tank (109) for the dust removal tower (1), and a ball valve or an electromagnetic valve is arranged on the fifth pipeline (108);

the sedimentation tank (201) and the water collection tank (202) are connected through a sixth pipeline (203) or a filtering device (3), a ball valve or an electromagnetic valve is arranged on the sixth pipeline (203), the sedimentation tank (201) and the water collection tank (202) are installed on a support (204), the installation position of the sedimentation tank (201) is higher than that of the water collection tank (202), and the installation position of the water collection tank (202) is higher than that of the circulating water tank (109).

2. The circulating liquid sedimentation system according to claim 1, wherein the sedimentation tank (201) has a funnel-shaped structure and comprises a funnel-shaped sewage collection tank (2011) at the lower part and a drain at the bottom, the inclined plane of the funnel-shaped sewage collection tank (2011) has an included angle of 40-50 degrees, and the drain is communicated with a drain pipe (2012) and a drain valve.

3. The circulating liquid sedimentation system according to claim 2, wherein the upper edge of the funnel-shaped sewage collection pool (2011) is higher than the lower edge of the water collection pool (202) by 300-600 mm.

4. The circulating liquid sedimentation system according to claim 3, wherein one end of the sixth pipe (203) communicates with the upper edge position of the funnel-shaped sewage collection pond (2011), and one end of the sixth pipe (203) communicates with the middle part of the sewage collection pond (202).

5. The circulating liquid settling system of claim 4, wherein one end of the fifth pipeline (108) is communicated with the bottom of the collecting tank (202), and the other end of the fifth pipeline (108) is communicated with the top of the circulating water tank (109).

6. The circulating liquid sedimentation system according to claim 5, wherein the integrated sedimentation tank (201) is made of PP, the bottom plate of the integrated sedimentation tank (201) has a thickness of 10-12 mm, and the side edges and the partition plates of the integrated sedimentation tank (201) have a thickness of 10-12 mm.

7. The circulating liquid sedimentation system according to claim 1, wherein the filter device (3) is installed at a communication opening of the sedimentation tank (201) and the water collection tank (202), the outside of the filter device (3) is made of a stainless steel wire mesh, the inside of the filter device (3) is filled with a glass wool material, the aperture of the stainless steel wire mesh is 0.5-2 mm, and the thickness of the glass wool material is 10-20 mm.

8. A circulating liquid sedimentation system according to claim 1, wherein the filtering device (3) is installed at a communication opening of a settling tank (201) and a sump (202), the filtering device (3) comprising a housing (301), a primary filter screen (307), a secondary filter screen (308), and a seal (309), wherein:

the outer edge of the shell (301) is provided with a mounting wall (302), and the sealing member (309) is arranged between the mounting wall (302) and the outer wall of the sedimentation tank (201);

the primary filter screen (307) is arranged on one side of the shell (301) close to the sedimentation tank (201), and the secondary filter screen (308) is arranged on one side of the shell (301) close to the water collecting tank (202);

the improved back-flushing water pump is characterized in that a back-flushing cavity (303) is arranged inside the shell (301), a plurality of back-flushing holes (304) are uniformly formed in the two sides of the shell (301), a plurality of water inlets (305) are formed in the top of the back-flushing cavity (303), and the water inlets (305) are communicated with a high-pressure water pipe through ball valves.

9. The circulating liquid sedimentation system according to claim 8, wherein the filter device (3) further comprises 8L-shaped fixing plates (306), and the L-shaped fixing plates (306) are mounted on the edge of the housing (301) through screws for fixing the primary filter screen (307) and the secondary filter screen (308).

10. The circulating liquid sedimentation system according to claim 9, wherein the mounting wall (302) is an arc-shaped wall and can be tightly attached to the outer wall of the sedimentation tank (201), the mounting wall (302) comprises 2 side mounting walls and 1 bottom mounting wall, and the sealing of the contact surface of the filtering device (3) and the sedimentation tank (201) can be realized by installing the 2 side mounting walls and the 1 bottom mounting wall on the outer wall of the sedimentation tank (201) through bolts.

Technical Field

The invention belongs to a water recycling technology, and particularly relates to a circulating liquid settling system.

Background

Wet dust removal, also called scrubbing dust removal, is a technique in which water (or other liquid) and a dust-containing gas are brought into contact with each other, and heat and mass transfer is accompanied to separate dust particles from the gas by scrubbing. Wet scrubbing separates pollutants from flue gases by intimately contacting the flue gases with a liquid, typically water. The device can purify solid particle pollutants in the waste gas, can also remove gaseous pollutants, and can also play a role in cooling the gas. The advantages are that: the device has the advantages of simple structure, low manufacturing cost and high purification efficiency, is suitable for purifying various non-fibrous dusts which do not have chemical action with water, and is particularly suitable for purifying high-temperature, inflammable and explosive gases. The disadvantages are that: the pipeline equipment must be anticorrosive, sewage sludge needs to be treated, the lifting height of flue gas is reduced, a chimney can produce condensed water in winter, and the like.

A device commonly used in the wet dust removal technology is provided with a cyclone dust removal tower, wherein the centrifugal force of a cyclone processor is designed to separate large particles and hemp-like substances in dust, and the large particles and the hemp-like substances fall into a dust collection box from top to bottom. And some light and fine dust enters the water washing cyclone tower through the top pipeline, and is thrown to the wall of the tower under the action of centrifugation and is trapped by the absorption liquid falling from top to bottom and flowing. When dust passes through the cyclone column plate at high speed, the absorption liquid on the blades is blown into very small fog drops, and the dust particles, the absorption liquid and the fog drops collide with each other under the action of mechanisms such as collision, interception motion and the like, so that the particle size is increased continuously. Under the guiding action of the cyclone tower plate, the rotating motion aggravates to generate strong centrifugal force, dust is easily separated from waste gas and thrown to the tower wall, and flows to the tower bottom under the action of gravity to realize gas-solid separation. For the fine dust particles in the waste gas, the fine dust particles can not be completely collected after passing through the first-stage tower plate, a certain amount of dust particles escape, after the fine dust particles pass through the multi-layer tower plates, the fine dust particles are coagulated, the mass of the fine dust particles is continuously increased, the fine dust particles are collected and separated, and then the fine dust particles enter the multi-surface ball adsorption filter layer at the uppermost layer for removing water, so that the multi-surface balls are large in area and high in adsorption capacity. And then the filtered gas is discharged out of the room through a negative pressure fan.

Along with the wide use of whirl gas wash tower, also brought new ambient pressure, partial mill is inside to lack waste water treatment device, directly arranges the waste water in the whirl gas wash tower, when a large amount of extravagant water sources, has polluted the environment, among the prior art, lacks the waste water purification system of recycling to the whirl gas wash tower.

Disclosure of Invention

Aiming at the defects, the circulating liquid sedimentation system is added under the condition that the existing structure of the existing cyclone dust removal tower is not changed, the system relies on the original circulating water pump for wet dust removal as lifting, the rear end of the system relies on gravity to automatically flow to the circulating water tank of the cyclone dust removal tower for recycling again, waste water purification and water resource consumption saving are realized, meanwhile, no power facility is additionally arranged, and the system is suitable for improvement of the existing cyclone dust removal tower.

In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:

the utility model provides a circulating liquid sedimentation system is including installing the outside pipeline on the gas wash tower and the comprehensive sedimentation tank of one side, outside pipeline includes first pipeline, second pipeline, first tee bend, third pipeline, second tee bend, fourth pipeline and fifth pipeline, synthesize the sedimentation tank and include sedimentation tank and water catch basin, wherein: one end of the first pipeline is connected with a water inlet of the dust removal tower, the other end of the first pipeline is connected with a first end of a first tee joint, and a ball valve or an electromagnetic valve is arranged on the first pipeline; one end of the second pipeline is connected with a water return port of the dust removal tower, the other end of the second pipeline is connected with a second end of the first tee joint, and a ball valve or an electromagnetic valve is arranged on the second pipeline; one end of the third pipeline is connected with the third end of the first tee joint, the other end of the third pipeline is connected with the output end of a circulating pump for the dust removal tower, the input end of the circulating pump is arranged inside a circulating water tank for the dust removal tower, and a ball valve or an electromagnetic valve is arranged on the third pipeline; the second tee joint is arranged on the third pipeline, one end of the fourth pipeline is communicated with the third pipeline through the second tee joint, the other end of the fourth pipeline is communicated with a sedimentation tank of the comprehensive sedimentation tank, and the fourth pipeline is provided with a ball valve or an electromagnetic valve; one end of a fifth pipeline is connected with the water collecting tank of the comprehensive sedimentation tank, the other end of the fifth pipeline is connected with a circulating water tank for the dust removal tower, and a ball valve or an electromagnetic valve is arranged on the fifth pipeline; the sedimentation tank and the water collection tank are connected through a sixth pipeline or a filtering device, a ball valve or an electromagnetic valve is arranged on the sixth pipeline, the sedimentation tank and the water collection tank are installed on the support, the installation position of the sedimentation tank is higher than that of the water collection tank, and the installation position of the water collection tank is higher than that of the circulating water tank.

Preferably, the sedimentation tank adopts a funnel-shaped structure and comprises a funnel-shaped sewage collection tank at the lower part and a sewage discharge outlet at the bottom, the inclined plane of the funnel-shaped sewage collection tank is at an included angle of 40-50 degrees, and the sewage discharge outlet is communicated with a sewage discharge pipe and a sewage discharge valve.

Preferably, the upper edge of the funnel-shaped sewage collecting tank is 300-600 mm higher than the lower edge of the water collecting tank.

Preferably, one end of the sixth pipeline is communicated with the upper edge of the funnel-shaped sewage collecting tank, and one end of the sixth pipeline is communicated with the middle part of the sewage collecting tank.

Preferably, one end of the fifth pipeline is communicated with the bottom of the water collecting tank, and the other end of the fifth pipeline is communicated with the top of the circulating water tank.

Preferably, the comprehensive sedimentation tank is made of PP materials, the thickness of a bottom plate of the comprehensive sedimentation tank is 10-12 mm, and the thickness of the side edge and the partition plate of the comprehensive sedimentation tank is 10-12 mm.

Preferably, the filtering device is arranged at the opening of the sedimentation tank and the water collecting tank, the outside of the filtering device is made of a stainless steel wire mesh, the inside of the filtering device is filled with glass wool materials, the aperture of the stainless steel wire mesh is 0.5-2 mm, and the thickness of the glass wool materials is 10-20 mm.

Preferably, filter equipment installs the intercommunication opening part at sedimentation tank and water catch bowl, filter equipment includes casing, primary filter screen, secondary filter screen and sealing member, wherein: the outer edge of the shell is provided with a mounting wall, and the sealing element is arranged between the mounting wall and the outer wall of the sedimentation tank; the primary filter screen is arranged on one side of the shell close to the sedimentation tank, and the secondary filter screen is arranged on one side of the shell close to the water collecting tank; the inside recoil chamber that is provided with of casing, a plurality of anti-punching holes have evenly been seted up to the both sides of casing, the top in recoil chamber is provided with a plurality of water inlets, the water inlet has high-pressure water pipe through ball valve intercommunication.

Preferably, the filter device further comprises 8L-shaped fixing plates, and the L-shaped fixing plates are mounted at the edge of the shell through screws and used for fixing the primary filter screen and the secondary filter screen.

Preferably, the installation wall is the arc wall and can closely laminate the outer wall of sedimentation tank, and the installation wall includes 2 side installation walls and 1 end installation wall, installs 2 side installation walls and 1 end installation wall through the bolt and can realize the sealing of filter equipment and sedimentation tank contact surface on the outer wall of sedimentation tank.

The circulating liquid sedimentation system has the following beneficial effects:

(1) according to the invention, under the condition that the existing structure of the existing cyclone dust removal tower is not changed, the circulating liquid sedimentation system is additionally arranged, the system relies on the original circulating water pump for wet dust removal as lifting, the rear end of the system relies on gravity to automatically flow to the circulating water tank of the cyclone dust removal tower for recycling, and no power facility is additionally arranged while wastewater purification and water resource consumption saving are realized, so that the system is suitable for improvement of the existing cyclone dust removal tower.

(2) The sedimentation tank and the water collection tank designed by the invention can realize sedimentation and impurity removal of wastewater by utilizing gravity, and particularly, a sewage discharge device is designed at the bottom of the sedimentation tank, so that the later maintenance can be greatly facilitated.

(3) The invention provides a filter element with a backwashing function, which is provided with an arc-shaped mounting wall and can be conveniently mounted on the wall of a circular sedimentation tank, and meanwhile, a backwashing cavity is arranged in the filter element, so that backwashing and impurity removal of a filter screen can be realized through backwashing after a high-pressure water source enters the backwashing cavity.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of a first structure of the integrated sedimentation tank according to the present invention;

FIG. 3 is a schematic diagram of a second structure of the integrated sedimentation tank according to the present invention;

fig. 4 is a schematic view of the installation of the filter device of the present invention.

FIG. 5 is a schematic view showing the internal structure of the filter device of the present invention.

In the figure, 1-a dust removal tower, 101-a first pipeline, 102-a second pipeline, 103-a first tee joint, 104-a third pipeline, 105-a second tee joint, 106-a fourth pipeline, 107-a circulating pump, 108-a fifth pipeline, 109-a circulating water tank, 2-a comprehensive sedimentation tank, 201-a sedimentation tank, 202-a water collecting tank, 203-a sixth pipeline, 204-a bracket, 2011-a sewage collecting tank, 2012-a sewage draining pipe, 3-a filtering device, 301-a shell, 302-an installation wall, 303-a back flushing cavity, 304-a back flushing hole, 305-a water inlet, 306-a fixing plate, 307-a primary filter screen, 308-a secondary filter screen and 309-a sealing element.

Detailed Description

The invention will be further explained with reference to the accompanying drawings in which:

as shown in fig. 1, a circulating liquid settling system comprises an external pipeline installed on a dust removing tower 1 and a comprehensive settling tank 201 on one side, wherein the external pipeline comprises a first pipeline 101, a second pipeline 102, a first tee 103, a third pipeline 104, a second tee 105, a fourth pipeline 106 and a fifth pipeline 108, the comprehensive settling tank 201 comprises a settling tank 201 and a water collecting tank 202, and: one end of a first pipeline 101 is connected with a water inlet of the dust removing tower 1, the other end of the first pipeline 101 is connected with a first end of a first tee 103, and a ball valve or an electromagnetic valve is arranged on the first pipeline 101; one end of the second pipeline 102 is connected with a water return port of the dust removal tower 1, the other end of the second pipeline 102 is connected with a second end of the first tee 103, and a ball valve or an electromagnetic valve is arranged on the second pipeline 102; one end of a third pipeline 104 is connected with the third end of the first tee 103, the other end of the third pipeline 104 is connected with the output end of a circulating pump 107 for the dust removing tower 1, the input end of the circulating pump 107 is arranged inside a circulating water tank 109 for the dust removing tower 1, and a ball valve or an electromagnetic valve is arranged on the third pipeline 104; the second tee joint 105 is installed on the third pipeline 104, one end of the fourth pipeline 106 is communicated with the third pipeline 104 through the second tee joint 105, the other end of the fourth pipeline 106 is communicated with the sedimentation tank 201 of the comprehensive sedimentation tank 201, and the fourth pipeline 106 is provided with a ball valve or an electromagnetic valve; one end of a fifth pipeline 108 is connected with the water collecting tank 202 of the comprehensive sedimentation tank 201, the other end of the fifth pipeline 108 is connected with the circulating water tank 109 for the dust removal tower 1, and a ball valve or an electromagnetic valve is arranged on the fifth pipeline 108; the sedimentation tank 201 and the water collection tank 202 are connected through a sixth pipeline 203 or a filtering device 3, a ball valve or an electromagnetic valve is arranged on the sixth pipeline 203, the sedimentation tank 201 and the water collection tank 202 are mounted on a support 204, the mounting position of the sedimentation tank 201 is higher than that of the water collection tank 202, and the mounting position of the water collection tank 202 is higher than that of the circulating water tank 109.

It should be noted that the circulating liquid settling system belongs to an intermittent settling system, and because each pipeline is provided with a ball valve or an electromagnetic valve, the design mode of a common pipeline is adopted in the scheme, when the dust removal tower 1 needs to feed water, the ball valve or the electromagnetic valve on the first pipeline 101 is opened, the circulating pump 107 is opened, the ball valve or the electromagnetic valve on the second pipeline 102 is opened and closed, and the ball valve or the electromagnetic valve on the fourth pipeline 106 is opened and closed, when the dust removal tower 1 needs to return water for purification, the ball valve or the electromagnetic valve on the first pipeline 101 is closed, the circulating pump 107 is closed, the ball valve or the electromagnetic valve on the second pipeline 102 is opened, the ball valve or the electromagnetic valve on the fourth pipeline 106 is opened and opened, and by using the gravity effect, the wastewater gradually enters the settling tank 201, the water.

As shown in fig. 2, the sedimentation tank 201 has a funnel-shaped structure and includes a funnel-shaped sewage collection tank 2011 at the lower part and a drain at the bottom, the inclined plane of the funnel-shaped sewage collection tank 2011 has an included angle of 40-50 degrees, and the drain is communicated with a drain pipe 2012 and a drain valve, so that periodic sewage drainage is facilitated.

During specific work, the circulating liquid sedimentation system reflows under the action of gravity, and adopts a structure that a secondary sedimentation tank gradually lowers, in the figure 1, the upper edge of a funnel-shaped sewage collection tank 2011 is 600 millimeters higher than the lower edge of a water collection tank 202, one end of a sixth pipeline 203 is communicated with the upper edge of the funnel-shaped sewage collection tank 2011, one end of the sixth pipeline 203 is communicated with the middle part of the water collection tank 202, one end of a fifth pipeline 108 is communicated with the bottom of the water collection tank 202, the other end of the fifth pipeline 108 is communicated with the top of a circulating water tank 109,

it should be noted that the effective volume of the sedimentation tank 201 is set according to the maximum circulating water volume of the cyclone tower, the effective volume of the water collecting tank 202 is set according to 70% of the volume of the sedimentation tank 201, the tank bodies are transparent vertical pipes for displaying water levels, the tank bodies are installed in the middle of the centers of the tank bodies and are marked with millimeter unit measurement for reading the water levels of the tank bodies and mud levels of mud tanks, the comprehensive sedimentation tank 201 is made of PP materials, the thickness of a bottom plate of the comprehensive sedimentation tank 201 is 10-12 millimeters, and the thickness of the side edges and partition plates of the comprehensive sedimentation tank 201 is 10-12 millimeters.

It should be noted that there are two connection schemes between the sedimentation tank 201 and the water collection tank 202: adopt the connection of sixth pipeline 203 or filter equipment 3 to connect, under the less condition of waste water impurity, adopt the pipe connection scheme can, as shown in fig. 2, just can fully deposit the edulcoration with sedimentation tank 201. In case of more impurities in the wastewater, the connection scheme of the filtering device 3 is needed, as shown in figure 3,

specifically, the filtering device 3 can also adopt a simple filtering device or a filtering device with a backwashing function, wherein the simple filtering device can be directly installed at the opening of the sedimentation tank 201 and the water collecting tank 202, the outside of the simple filtering device 3 is made of a stainless steel wire mesh, the inside of the filtering device 3 is filled with glass wool, the aperture of the stainless steel wire mesh is 0.5-2 mm, and the thickness of the glass wool is 10-20 mm.

A filter device with a backwashing function, as shown in fig. 4 and 5, may be installed at a communication opening of the settling tank 201 and the sump 202, and the filter device 3 includes a housing 301, a primary filter screen 307, a secondary filter screen 308, and a sealing member 309, wherein: the outer edge of casing 301 is provided with installation wall 302, and sealing member 309 sets up between the outer wall of installation wall 302 and sedimentation tank 201, and installation wall 302 is the arc wall and can closely laminate the outer wall of sedimentation tank 201, and installation wall 302 includes 2 side installation walls and 1 end installation wall, installs 2 side installation walls and 1 end installation wall through the bolt and can realize the sealed of filter equipment 3 with sedimentation tank 201 contact surface on the outer wall of sedimentation tank 201.

Specifically, the primary filter screen 307 is installed on one side of the casing 301 close to the sedimentation tank 201, the secondary filter screen 308 is installed on one side of the casing 301 close to the water collecting tank 202, the outer portion of the primary filter screen 307 is made of stainless steel wire meshes, the inner portion of the primary filter screen is filled with glass wool, the aperture of each stainless steel wire mesh is 1-2 mm, and the thickness of each glass wool is 5-8 mm. The outer parts of the secondary filter screens 308 are all made of stainless steel wire meshes, the inner parts of the secondary filter screens are filled with glass wool materials, the aperture of each stainless steel wire mesh is 05-1 mm, and the thickness of each glass wool material is 8-12 mm.

Specifically, casing 301 is inside to be provided with recoil chamber 303, and a plurality of anti-punching holes 304 have evenly been seted up to casing 301's both sides, and the top of recoil chamber 303 is provided with a plurality of water inlets 305, and water inlet 305 has high-pressure water pipe through the ball valve intercommunication, when needs wash recoil chamber 303 inside, can insert rivers return circuit respectively with a plurality of water inlets 305, takes away inside impurity through intaking, play water.

As shown in fig. 5, the filtering apparatus 3 further includes 8L-shaped fixing plates 306, 4L-shaped fixing plates 306 are provided on each side, and are fixed in four directions, i.e., up, down, left, and right, respectively, and the L-shaped fixing plates 306 are mounted on the edge of the housing 301 by screws for fixing the primary filter screen 307 and the secondary filter screen 308. In the actual filtering process, waste water is firstly filtered through a primary filter screen 307, then enters a backflushing cavity 303 through a one-side backflushing hole 304, then enters a secondary filter screen 308 through a another-side backflushing hole 304 to complete double filtering, the inside of the filtering piece is provided with the backflushing cavity, after a high-pressure water source enters the backflushing cavity, backflushing and impurity removal of the filter screen can be achieved through the backflushing hole, when the inside of the backflushing cavity 303 needs to be cleaned, a plurality of water inlets 305 can be respectively connected into a water flow loop, and internal impurities are taken away through water inlet and.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.