Improved negative-pressure scum discharging device for scum on liquid surface of circular pool

Abstract

The utility model provides an improved negative pressure deslagging device for scum on the liquid level of a round pool, which is characterized in that the negative pressure deslagging device comprises a scum suction device and a deslagging device, the scum suction device is connected with a scum inlet of a gas-water separator assembly, a scum outlet of the gas-water separator assembly is connected with the deslagging device, and the scum suction device is connected with a scum outlet of the gas-water separator assembly. The gas-water separator assembly is further connected with the vacuum generator assembly. The utility model solves the problem of how to enable the negative pressure slag suction pipeline to have larger and more stable vacuum degree and the problem of dry grinding of the slag discharge pump in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental protection water treatment, in particular to an improved negative pressure slag discharge device for scum on the liquid surface of a circular water pool. Background Art

[0002] Patent CN201721486575 "A slag discharge device for the liquid surface of a circular water pool" (authorization announcement number CN207645859U) provides a negative pressure slag discharge solution for the liquid surface of a circular water pool and has been widely used. However, there are still some shortcomings in actual operation, which are specifically manifested in: First, in order to meet the vacuum required for negative pressure slag suction, the water content of the slag cannot be too low, otherwise it will cause dry grinding of the slag conveying pump; second, a rotor pump with a higher suction head is required to maintain a stable negative pressure, and the price is relatively high; third, the fluctuation of the liquid level in the water pool (i.e., the change in liquid level) causes the suction nozzle to be exposed to the liquid surface and a large amount of air to enter, making it impossible to maintain sufficient negative pressure in the slag suction pipeline, resulting in dry-running and erosion of the slag conveying pump; fourth, the noise of the rotor pump when pumping gas, liquid and solid three-phase media is greater than that of the screw pump and the centrifugal pump.

[0003] Therefore, how to make the negative pressure slag suction pipeline have a larger and more stable vacuum degree, and solve the technical problem of dry grinding inside the pump body caused by a large amount of air entering the slag discharge pump due to liquid level changes. Utility Model Content

[0004] The purpose of the utility model is to provide an improved negative pressure slag discharge device for slag on the liquid surface of a circular water pool, mainly to solve the problems existing in the above-mentioned prior art: first, how to maintain a negative pressure slag suction pipeline with a larger and more stable vacuum degree; second, how to overcome the dry grinding inside the pump body caused by a large amount of air entering the slag discharge pump due to changes in the liquid level.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an improved negative pressure slag discharge device for slag on the liquid surface of a circular water pool, characterized in that: the negative pressure slag discharge device includes a slag suction device and a slag discharge device, the slag suction device is connected to the slag inlet of the air-water separator assembly, the slag outlet of the air-water separator assembly is connected to the slag discharge device, and the air-water separator assembly is also connected to the vacuum generator assembly.

[0006] Furthermore, the gas-water separator assembly includes a gas-water separator, a slag inlet of the gas-water separator is connected to a slag suction device, and a slag outlet of the gas-water separator is connected to a slag discharge device.

[0007] Further, the gas-water separator is connected to a liquid level meter;

[0008] The gas-water separator is connected to a negative pressure meter, and the negative pressure meter is interlocked with the vacuum generator assembly for control.

[0009] Furthermore, the vacuum generator assembly includes a vacuum generator, and the suction port of the vacuum generator is connected to the suction port of the air-water separator.

[0010] Furthermore, an automatic air intake switch valve is provided at the compressed air inlet of the vacuum generator, and an automatic air exhaust switch valve is provided between the suction port of the vacuum generator and the air exhaust port of the air-water separator.

[0011] Furthermore, the air outlet of the vacuum generator is connected to the upper space of the water pool or a nearby waste gas collection pipe.

[0012] Furthermore, the slag suction equipment includes a circular water pool with water inlet at the center and water outlet at the periphery, a central rotating mechanism, a slag suction nozzle, a negative pressure slag suction pipe in the pool, and a negative pressure slag suction pipe outside the pool. The lower part of the central rotating mechanism is connected to one end of the negative pressure slag suction pipe in the pool, and the other end of the negative pressure slag suction pipe in the pool is connected to the slag suction nozzle; the upper part of the central rotating mechanism is connected to one end of the negative pressure slag suction pipe outside the pool, and the other end of the negative pressure slag suction pipe outside the pool is connected to the slag inlet of the gas-water separator;

[0013] The central rotating mechanism is installed on the top surface of the circular water pool, and the central rotating mechanism drives the negative pressure slag suction pipe and the floating slag suction nozzle in the pool to perform a rotary motion in the circular water pool.

[0014] Further, the slag discharge equipment includes a slag conveying pump, and the outlet of the slag conveying pump is connected to the slag discharge pipe;

[0015] The slag conveying pump and liquid level gauge are interlocked and controlled.

[0016] Furthermore, the scum outlet of the gas-water separator is connected to the inlet of the scum conveying pump through a connecting pipe.

[0017] Furthermore, the gas-water separator at least comprises a gas-water separation tank, a scum inlet, a scum outlet, an air extraction port, and a first interface for installing a negative pressure meter are arranged on the gas-water separation tank, and the air extraction port and the first interface are both arranged at the upper part of the gas-water separation tank;

[0018] The scum outlet is arranged at the bottom of the gas-water separation tank;

[0019] A second interface for installing a liquid level meter is provided on the tank body of the gas-water separation tank.

[0020] In view of the above technical features, the utility model has the following advantages:

[0021] 1. The utility model discloses an improved negative pressure slag discharge device for scum on the liquid surface of a circular water pool. By adding a gas-water separator component and a vacuum generator component, the gas-water separator component is connected to a negative pressure slag suction pipeline. The negative pressure slag suction pipeline negatively sucks gas, liquid and solid three-phase slag, and the gas-water separator component separates the gas from the liquid and solid of the three-phase slag. The vacuum generator component extracts the separated gas, and the vacuum generator component provides a larger and more stable vacuum degree for the gas-water separator component and the negative pressure slag suction pipeline. The separated liquid-solid two-phase slag is discharged by a slag conveying pump and a slag discharge pipe.

[0022] 2. The utility model is an improved negative pressure slag discharge device for scum on the liquid surface of a circular pool. By adding a gas-water separator component and a vacuum generator component, the gas-water separator component and the negative pressure slag suction pipeline maintain a larger and more stable vacuum degree, which can meet the needs of suction and discharge of scum with a low water content, and the discharged scum has a lower water content. Subsequently, the three-phase scum is separated into gas, liquid and solid by the gas-water separator component, and the separated liquid-solid two-phase scum is discharged by a slag conveying pump and a slag discharge pipe. Therefore, even if the scum has a low water content, it will not cause dry grinding of the slag conveying pump.

[0023] 3. The utility model is an improved negative pressure slag discharge device for the slag on the liquid surface of a circular pool. By adding a gas-water separator component and a vacuum generator component, the gas-water separator component and the negative pressure slag suction pipeline provide a larger and more stable vacuum degree. It does not rely solely on the slag conveying pump to provide vacuum for the negative pressure slag suction pipeline, and there is no need to use a rotor pump with a higher suction head to maintain a stable negative pressure, thereby reducing the price and cost of the slag conveying pump. It also solves the problem in the prior art that the slag conveying pump provides vacuum for the negative pressure slag suction pipeline, which leads to unstable vacuum degree under the fluctuation of liquid level, resulting in insufficient suction of the negative pressure slag suction pipeline and affecting the slag suction and discharge effect.

[0024] 4. The utility model is an improved negative pressure slag discharge device for slag on the liquid surface of a circular water pool. By adding an air-water separator component and a vacuum generator component, the air-water separator component and the negative pressure slag suction pipeline provide a larger and more stable vacuum degree. Even if the water pool liquid level fluctuates and causes the suction nozzle to be exposed from the liquid surface and a large amount of air enters, the slag suction pipeline can be kept with sufficient negative pressure to suck the slag. The slag conveying pump is not started until there is a sufficient liquid level in the air-water separation tank, thereby avoiding dry-running erosion of the slag conveying pump and making the pump type selection range of the slag conveying pump wider, such as a screw pump or a centrifugal pump.

[0025] 5. The utility model is an improved negative pressure slag discharge device for slag on the liquid surface of a circular water pool. By adding a gas-water separator component and a vacuum generator component, the gas-water separator component separates the gas from the liquid and solid of the three-phase slag, and the vacuum generator component extracts the separated gas. The separated liquid-solid two-phase slag is discharged by a slag conveying pump and a slag discharge pipe. The medium conveyed by the slag conveying pump does not contain compressible air or separated gas, the noise is small, and the production environment is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of an improved negative pressure slag removal device for scum on the liquid surface of a circular water pool in specific embodiment 1.

[0027] In the figure: 1. circular water pool; 2. central rotating mechanism; 3. scum suction nozzle; 4. negative pressure scum suction pipe inside the pool; 5. negative pressure scum suction pipe outside the pool; 6. gas-water separator assembly; 61. gas-water separator; 611. gas-water separation tank; 62. scum inlet; 63. scum outlet; 64. air extraction port; 65. first interface; 66. second interface; 7. negative pressure gauge; 8. liquid level gauge; 9. vacuum generator assembly; 91. vacuum generator; 92. automatic air intake switch valve; 93. automatic air extraction switch valve; 10. scum conveying pump; 11. connecting pipe; 12. scum discharge pipe. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

[0029] See also Figure 1 , specific embodiment 1, this embodiment 1 provides an improved negative pressure slag discharge device for slag on the liquid surface of a circular water pool 1, the negative pressure slag discharge device includes a slag suction device and a slag discharge device, the slag suction device is connected to the slag inlet 62 of the air-water separator assembly 6, the slag outlet 63 of the air-water separator assembly 6 is connected to the slag discharge device, and the air-water separator assembly 6 is also connected to the vacuum generator assembly 9.

[0030] For example, in a radial flow water treatment pool with central water inlet and peripheral water outlet, materials with a specific gravity less than water float to the water surface during the process of water flow radiating from the center to the periphery, and the scum is pushed to the position around the pool surface under the impetus of the radial water flow. The circular water pool 1 can also be replaced by a circular water tank with central water inlet and peripheral water outlet.

[0031] The slag suction equipment includes a circular water pool 1 with water inlet at the center and water outlet at the periphery, a central rotating mechanism 2, a slag suction nozzle 3, a negative pressure slag suction pipe 4 in the pool, and a negative pressure slag suction pipe 5 outside the pool. The lower part of the central rotating mechanism 2 is connected to one end of the negative pressure slag suction pipe 4 in the pool, and the other end of the negative pressure slag suction pipe 4 in the pool is connected to the slag suction nozzle 3; the upper part of the central rotating mechanism 2 is connected to one end of the negative pressure slag suction pipe 5 outside the pool, and the other end of the negative pressure slag suction pipe 5 outside the pool is connected to the slag inlet of the gas-water separator 6. The "negative pressure slag suction" is to generate negative pressure at the slag suction nozzle 3 to suck out the slag floating to the liquid surface in a manner similar to "dust suction" without stirring the slag layer.

[0032] The central rotating mechanism 2 is installed on the top surface of the circular pool 1, and the central rotating mechanism 2 drives the negative pressure slag suction pipe 4 and the slag suction nozzle 3 in the pool to make a rotational motion in the circular pool 1. The negative pressure slag pipe outside the pool is fixed. The central rotating mechanism 2 can also refer to the central rotating facility, rotating pipe joint, rotating bracket and other structures in Chinese patent CN201721486575 "A slag discharge device for the liquid surface of a circular pool" (authorization announcement number CN207645859U), which will not be repeated here.

[0033] The gas-water separator assembly 6 includes a gas-water separator 61, which at least includes a gas-water separation tank 611. The slag inlet 62 of the gas-water separator 61 (i.e., the slag inlet 62 of the gas-water separator 611) is connected to a slag suction device, and the slag outlet 63 of the gas-water separator 61 (i.e., the slag outlet 63 of the gas-water separator 611) is connected to a slag discharge device. An air suction port 64 connected to the vacuum generating assembly 9, a first interface 65 for installing a negative pressure gauge 7, and a second interface 66 for installing a liquid level gauge 8 are provided on the gas-water separator 611, and the air suction port 64 and the first interface 65 are both provided at the upper part of the gas-water separator 611; the slag outlet 63 of the gas-water separator 61 is provided at the bottom of the gas-water separator 611, and the slag outlet 63 of the gas-water separator 61 is connected to the inlet of the slag discharge device (i.e., the slag conveying pump 10) through a connecting pipe 11; and a second interface 66 for installing a liquid level gauge 8 is provided on the tank body of the gas-water separator 611.

[0034] The gas-water separator 61 is connected to the liquid level meter 8, and the liquid level meter 8 and the slag discharge equipment (i.e., the slag conveying pump 10) are interlocked to ensure that the slag conveying pump 10 will not run dry (i.e., run idle). That is to say, the liquid level meter 8 detects the level of the separated liquid in the chamber of the gas-water separation tank 611, and controls the operation of the slag conveying pump 10 in a linked manner (i.e., "interlocked control") to avoid the slag conveying pump 10 from running dry. For example, when the liquid-solid slag in the chamber of the gas-water separation tank 611 sinks, when the liquid level meter 8 detects that the level of the separated liquid is higher than the set value, the slag conveying pump 10 is put into operation to help discharge the slag in the chamber of the gas-water separation tank 611. When the liquid level meter 8 detects that the level of the separated liquid is lower than the set value, the slag conveying pump 10 stops running to avoid running dry.

[0035] The gas-water separator 61 is connected to the negative pressure meter 7, and the negative pressure meter 7 is interlocked with the vacuum generator assembly 9 to ensure that the negative pressure slag suction pipeline (i.e., including the gas-water separation tank 611, the negative pressure slag suction pipe 4 in the pool, the negative pressure slag suction pipe 5 outside the pool, and the floating slag suction nozzle 3) is in a stable negative pressure state when sucking slag. The negative pressure meter 7 detects the vacuum degree in the gas-water separation tank 611 and controls the operation of the vacuum generator assembly 9 in a linkage manner (i.e., "interlocking control") to ensure that the vacuum degree in the gas-water separation tank 611 is stable. Grounding is used to ensure that the negative pressure slag suction pipeline is in a stable negative pressure state when sucking slag. For example, when the pressure of the negative pressure pipeline (i.e., the vacuum degree or air pressure value in the gas-water separation tank 611 detected by the negative pressure gauge 7) is greater than the set value, the vacuum generator assembly 9 is put into operation to increase the vacuum degree in the chamber of the gas-water separation tank 611; when the pressure of the negative pressure pipeline (i.e., the vacuum degree or air pressure value in the gas-water separation tank 611 detected by the negative pressure gauge 7) is less than the set value, the vacuum generator assembly 9 stops running.

[0036] The vacuum generator assembly 9 includes a vacuum generator 91, the suction port of the vacuum generator 91 is connected to the air suction port 64 of the gas-water separator 61, and the vacuum required for the gas-water separation tank 611 to perform negative pressure slag suction is maintained under the action of the vacuum generator assembly 9. An automatic air intake switch valve 92 is provided at the compressed air inlet of the vacuum generator 91, and an automatic air suction switch valve 93 is provided between the suction port of the vacuum generator 91 and the air suction port 64 of the gas-water separator 61.

[0037] The gas outlet of the vacuum generator 91 is connected to the upper space of the water pool. For example, when the treated water contains harmful pollutants or has an odor, the gas extracted by the vacuum generator 91 is directly sent to the upper space of the water pool, and then collected and treated uniformly by the water pool waste gas collection facility, or directly sent to the nearest waste gas collection pipeline.

[0038] The slag discharge equipment includes a slag conveying pump 10, which is used to convey the slag (or other pollutants such as floating oil) separated by the gas-water separation tank 611. The outlet of the slag conveying pump 10 is connected to a slag discharge pipe 12, which is used to connect to an external slag storage tank or further processing equipment.

[0039] The gas-water separation tank 611 separates the gas from the liquid and solid in the gas-water separation tank 611, and the water and solid flow into or fall into the lower chamber of the gas-water separation tank 611. The scum is transported to the post-processing equipment for further disposal via the scum conveying pump 10. That is to say, the gas, liquid and solid three-phase medium of the negative pressure suction scum has been separated before the scum conveying pump 10. The medium conveyed by the scum conveying pump 10 is liquid-solid two-phase, and can be conveyed by ordinary sludge conveying pumps such as screw pumps, which is low in cost. In addition, the medium conveyed by the scum conveying pump 10 does not contain compressible air, has low noise, and improves the production environment.

[0040] The separated gas gathers in the upper chamber of the gas-water separation tank 611, and then the separated gas is extracted by the vacuum generator 91 to maintain the gas-water separation tank 611, the negative pressure slag suction pipe 4 inside the pool, the negative pressure slag suction pipe 5 outside the pool, the slag suction nozzle 3 and other components with a stable negative pressure when sucking slag, that is to say, the vacuum degree of the negative pressure slag suction pipe 4 inside the pool, the negative pressure slag suction pipe 5 outside the pool, and the slag suction nozzle 3 used for negative pressure suction of slag on the liquid surface is ensured by the vacuum generator assembly 9 (i.e., the vacuum generator 91), and the vacuum generator 91 is powered by compressed air instead of the inlet negative pressure of the slag conveying pump 10. The vacuum degree of the slag suction nozzle 3 is higher and more stable, and slag with a lower water content can also be sucked up, and the water content of the discharged slag is lower, and the amount of slag is small.

[0041] In this embodiment 1, an improved negative pressure slag removal device for scum on the liquid surface of a circular water pool 1 has the following working principle:

[0042] The circular pool 1 (tank) with water inlet at the center and water outlet at the periphery, the scum (oil) floating to the surface will gather on the water surface around the pool. When the amount of scum accumulates to a certain thickness, it needs to be discharged. According to the content of impurities in the water to be treated, the scum discharge method is generally timed intermittently, and does not need to be continuously operated.

[0043] When receiving the instruction to discharge slag, the vacuum generator assembly 9 is started, that is, the automatic air suction switch valve 93 is automatically opened, and the air intake automatic switch valve 92 of the compressed air inlet is opened at the same time. When the negative pressure of the negative pressure slag suction pipe (i.e. the negative pressure slag suction pipe 4 inside the pool and the negative pressure slag suction pipe 5 outside the pool) reaches a certain value (generally less than -0.02MPa), the slag on the liquid surface will be sucked up by the slag suction nozzle 3 and sucked into the chamber in the gas-water separation tank 611; when the liquid level in the gas-water separation tank 611 reaches the set height, the slag conveying pump 10 is started to discharge slag.

[0044] When the negative pressure of the negative pressure slag suction pipeline and the gas-water separation tank 611 is less than the set value, generally -0.05MPa, the negative pressure meter 7 on the gas-water separation tank 611 (i.e., the gas-water separator 6) outputs a contact signal, and the vacuum generator assembly 9 stops running, i.e., the automatic air suction switch valve 93 is closed, and then the automatic air intake switch valve 92 of the compressed air inlet is closed. On the contrary, when the negative pressure of the negative pressure meter 7 is greater than the set value, generally -0.02MPa, the negative pressure meter 7 outputs a contact signal, and the vacuum generator assembly 9 needs to be started again.

[0045] When the liquid level in the gas-water separator 61 (i.e., the gas-water separation tank 611) is greater than the set value, generally lower than the position of the slag inlet 62, the liquid level meter 8 sends a contact signal to automatically start the slag conveying pump 10, and the slag conveying pump 10 automatically starts to run and discharges the slag to further processing facilities through the slag discharge pipe 12; when the liquid level in the gas-water separator 61 is less than the set value, generally to ensure that the slag conveying pump 10 is not in a dry-running state, the liquid level meter 8 sends a contact signal to automatically stop the slag conveying pump 10, and the slag conveying pump 10 automatically stops running.

[0046] Through the above operation mode, the scum generated in the circular pool 1 can be continuously discharged to a designated place.

[0047] Specific application scenario 1: According to the quality of the influent water, the amount of pollutants that need to be removed from the water is about 50kg / h. According to the calculation that the moisture content of the discharged scum is 97%, the scum water that needs to be removed is about 1.7m 3 / h. According to the slag discharge 4 times a day, the operation is carried out at equal time intervals, and the mud discharge time is 1 hour each time. 3 / h slag conveying pump 10. Accordingly, it is necessary to match DN50 negative pressure slag suction pipeline (i.e. negative pressure slag suction pipe 4 in the pool and negative pressure slag suction pipe 5 outside the pool), and it is necessary to select a vacuum generator 91 with a suction capacity of more than 170L / min and a vacuum degree of more than 0.04MP.

[0048] Specific application scenario 2: According to the quality of the incoming water, the amount of pollutants that need to be removed from the water is about 100kg / h. According to the calculation that the moisture content of the discharged scum is 97%, the scum water that needs to be removed is about 3.4m 3 / h. According to the slag discharge 6 times a day, each time the mud discharge time is 1 hour, select a machine with an output of 13.6m 3 / h slag conveying pump 10. Therefore, it is necessary to match the DN65 negative pressure slag suction pipeline, and the vacuum generator 91 needs to have a suction capacity of more than 300L / min and a vacuum degree of more than 0.04MP.

[0049] Specific application scenario three: According to the quality of the influent water, the amount of pollutants that need to be removed from the water is about 150kg / h. According to the calculation that the moisture content of the discharged scum is 98%, the scum water that needs to be removed is about 7.5m 3 / h. According to the slag discharge 8 times a day, the operation is carried out at equal time intervals, and the mud discharge time is 1 hour each time. A machine with an output of 22.5m 3 / h slag conveying pump 10. Based on this, a matching DN80 negative pressure slag suction pipeline is required, and a vacuum generator 91 with a suction capacity of more than 452L / min and a vacuum degree of more than 0.03MP is required.

[0050] Specific application scenario 4: According to the quality of the influent water, the amount of pollutants that need to be removed from the water is about 240kg / h. According to the calculation that the moisture content of the discharged slag is 96%, the slag water that needs to be removed is about 6.0m 3 / h. According to the slag discharge 6 times a day, the operation is carried out at equal time intervals, and the mud discharge time is 2 hours each time. 3 / h slag conveying pump 10. Accordingly, a matching DN65 negative pressure slag suction pipeline is required, and a vacuum generator 91 with a suction capacity of more than 300L / min and a vacuum degree of more than 0.05MP is required.

[0051] Specific embodiment 2, this embodiment 2 provides an improved negative pressure slag discharge device for slag on the liquid surface of a circular water pool 1, the negative pressure slag discharge device includes a slag suction device and a slag discharge device, the slag suction device is connected to the slag inlet 62 of the air-water separator assembly 6, the slag outlet 63 of the air-water separator assembly 6 is connected to the slag discharge device, and the air-water separator assembly 6 is also connected to the vacuum generator assembly 9.

[0052] The gas-water separator assembly 6 includes a gas-water separator 61, a slag inlet 62 of the gas-water separator 61 is connected to a slag suction device, and a slag outlet 63 of the gas-water separator 61 is connected to a slag discharge device. The slag suction device includes a slag suction nozzle 3 and a negative pressure slag suction pipe, and the negative pressure slag suction pipe connects the slag suction nozzle 3 and the slag inlet 62 of the gas-water separator 61.

[0053] The slag discharge equipment includes a slag conveying pump 10 and a slag discharge pipe 12 . The slag outlet 63 of the gas-water separator 61 is connected to the inlet of the slag conveying pump 10 , and the outlet of the slag conveying pump 10 is connected to the slag discharge pipe 12 .

[0054] The vacuum generator assembly 9 includes a vacuum generator 91 , and a suction port of the vacuum generator 91 is connected to the suction port 64 of the air-water separator 61 .

[0055] The gas-water separator 61 separates the gas, liquid and solid three-phase scum sucked by negative pressure, and the vacuum generator 91 extracts the separated gas, and the liquid-solid two-phase scum is discharged by the scum conveying pump 10 and the scum discharge pipe 12, which can also effectively avoid the serious abrasion of the pump body and rotating parts of the three-phase scum medium scum conveying pump 10. The vacuum generator 91 ensures that the gas-water separator 61, the negative pressure scum suction pipe and the scum suction nozzle 3 have a stable negative vacuum when sucking scum, so as to effectively suck out the scum on the liquid surface, so that the discharged scum has a lower moisture content and a smaller amount of scum.

[0056] The negative pressure slag discharge device of the present embodiment 2 can be applied to any suction location, not limited to the liquid surface of the circular water pool 1, for example, it can be used to extract sludge from the bottom of the pool.

[0057] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An improved negative pressure slag removal device for scum on the liquid surface of a circular water pool, characterized in that: The negative pressure slag discharge device comprises a slag suction device and a slag discharge device, the slag suction device is connected to the slag inlet of the gas-water separator component (6), the slag outlet of the gas-water separator component (6) is connected to the slag discharge device, and the gas-water separator component (6) is also connected to the vacuum generator component (9); The slag suction device comprises a circular water pool (1) with water inlet at the center and water outlet at the periphery, a central rotating mechanism (2), a slag suction nozzle (3), a negative pressure slag suction pipe (4) inside the pool, and a negative pressure slag suction pipe (5) outside the pool. The lower part of the central rotating mechanism (2) is connected to one end of the negative pressure slag suction pipe (4) inside the pool, and the other end of the negative pressure slag suction pipe (4) inside the pool is connected to the slag suction nozzle (3); the upper part of the central rotating mechanism (2) is connected to one end of the negative pressure slag suction pipe (5) outside the pool, and the other end of the negative pressure slag suction pipe (5) outside the pool is connected to the slag inlet (62) of the gas-water separator (61); The central rotating mechanism (2) is installed on the top surface of the circular water pool (1), and the central rotating mechanism (2) drives the negative pressure slag suction pipe (4) and the floating slag suction nozzle (3) in the pool to perform a rotary motion in the circular water pool (1).

2. The improved negative pressure slag removal device for the surface scum of a circular water pool according to claim 1, characterized in that: The gas-water separator assembly (6) comprises a gas-water separator (61), a slag inlet (62) of the gas-water separator (61) is connected to a slag suction device, and a slag outlet (63) of the gas-water separator (61) is connected to a slag discharge device.

3. The improved negative pressure slag removal device for the surface scum of a circular water pool according to claim 2, characterized in that: The gas-water separator (61) is connected to a liquid level meter (8); the top of the gas-water separator (61) is also connected to a negative pressure meter (7), and the negative pressure meter (7) is interlocked with the vacuum generator assembly (9) for control.

4. An improved negative pressure slag removal device for scum on the surface of a circular pool according to claim 2 or 3, characterized in that: The vacuum generator assembly (9) comprises a vacuum generator (91), and a suction port of the vacuum generator (91) is connected to a suction port (64) of the air-water separator (61).

5. The improved negative pressure slag removal device for the surface slag of a circular pool according to claim 4, characterized in that: An automatic air intake switch valve (92) is provided at the compressed air inlet of the vacuum generator (91), and an automatic air exhaust switch valve (93) is provided between the suction port of the vacuum generator (91) and the air exhaust port (64) of the air-water separator (61).

6. The improved negative pressure slag removal device for the surface slag of a circular pool according to claim 5, characterized in that: The gas outlet of the vacuum generator (91) is connected to the upper space of the water pool or a nearby waste gas collection pipeline.

7. An improved negative pressure slag removal device for scum on the surface of a circular pool according to claim 3 or 6, characterized in that: The slag discharge equipment comprises a slag conveying pump (10), and the outlet of the slag conveying pump (10) is connected to a slag discharge pipe (12); The slag conveying pump (10) and the liquid level meter (8) are interlockingly controlled.

8. The improved negative pressure slag removal device for the surface slag of a circular pool according to claim 7, characterized in that: The scum outlet (63) of the gas-water separator (61) is connected to the inlet of the scum conveying pump (10) through a connecting pipe (11).

9. The improved negative pressure slag removal device for the surface slag of a circular pool according to claim 8, characterized in that: The gas-water separator (61) comprises at least a gas-water separation tank (611), a scum inlet (62), a scum outlet (63), an air suction port (64), and a first interface (65) for installing a negative pressure meter (7) are arranged on the gas-water separation tank (611), and the air suction port (64) and the first interface (65) are both arranged at the upper part of the gas-water separation tank (611); The scum outlet (63) is arranged at the bottom of the gas-water separation tank (611); The gas-water separation tank (611) is provided with a second interface (66) for installing a liquid level meter (8) on the tank body.

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