Protection device for blowdown pump and boiler blowdown system

Abstract

The present application relates to the technical field of sewage pump, in particular to a sewage pump sewage protection device and a boiler sewage system, the sewage pump sewage protection device comprises a sewage pump, including a water inlet, a discharge port and a water injection hole; water pipe; cooling water pipe; cooling pond, one end is communicated with the water inlet through the water pipe, the other end is connected with the cooling water pipe; water injection pipe, one end is communicated with the water injection hole, the other end is connected with the cooling water pipe; the present application can effectively solve the technical problem of low service life of the sewage pump when discharging sewage with high temperature.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sewage pumps, in particular to a sewage pump sewage protection device and a boiler sewage system. BACKGROUND

[0002] In the field of large-scale power generation technology, the boiler area will periodically discharge sewage into the wastewater pool for purification and recycling, and these wastewater needs to be pumped and transported by a sewage pump. The wastewater periodically discharged by the boiler sometimes has a high temperature, such as 60°C sewage. If the wastewater with a high temperature is directly pumped and discharged by the sewage pump, the internal parts of the sewage pump will easily age or burn out for a long time, thereby affecting the service life of the sewage pump.

[0003] Therefore, how to solve the problem of low service life of the sewage pump when transporting the wastewater periodically discharged by the boiler is a technical problem that needs to be solved in the prior art. SUMMARY

[0004] In view of the above shortcomings of the prior art, the purpose of the present application is to provide a sewage pump sewage protection device and a boiler sewage system to solve the technical problem of low service life of the sewage pump when discharging sewage with a high temperature.

[0005] To achieve the above and other related purposes, the present application provides a sewage pump sewage protection device, comprising: a sewage pump comprising a water inlet, a discharge outlet and a water injection hole;

[0006] a water diversion pipe; a cooling water pipe;

[0007] a cooling pool, one end of which is communicated with the water inlet through the water diversion pipe, and the other end of which is connected with the cooling water pipe;

[0008] a water injection pipe, one end of which is communicated with the water injection hole, and the other end of which is communicated with the cooling water pipe.

[0009] As one of the embodiments of the present application, the sewage pump sewage protection device further comprises a motor, which is connected with the sewage pump and used to drive the sewage pump to operate.

[0010] As one of the embodiments of the present application, the water injection hole is located beside the water inlet.

[0011] As one of the embodiments of the present application, a first valve is arranged between the communication position of the cooling water pipe and the water injection pipe and the cooling pool; and a second valve is arranged on the water injection pipe.

[0012] As one of the embodiments of the present application, a water temperature sensor is arranged in at least one of the cooling pool, the water diversion pipe and the water inlet; the first valve is an intelligent control valve, and the water temperature sensor is signal connected with the first valve.

[0013] As one of the embodiments of the present application, the second valve is an intelligent control valve; the idle detection sensor is electrically connected with the blowdown pump and the second valve.

[0014] As one of the embodiments of the present application, the cooling water pipe is communicated with the upper part of the cooling pool.

[0015] As one of the embodiments of the present application, the water guide pipe extends to the lower part of the cooling pool.

[0016] As one of the embodiments of the present application, the water injection pipe and the water guide pipe are detachably connected with the blowdown pump.

[0017] As one of the embodiments of the present application, the water injection pipe comprises a detachable section between the second valve and the water injection hole; the detachable section comprises a first double-thread pipe, a union joint and a second double-thread pipe, so as to facilitate the disassembly between the water injection pipe and the blowdown pump, and further facilitate the maintenance of the blowdown pump.

[0018] As one of the embodiments of the present application, when the water temperature sensor detects that the water temperature is higher than a preset first threshold, the first valve is opened.

[0019] As one of the embodiments of the present application, when the idle detection sensor detects that the fluid amount in the blowdown pump is lower than a preset second threshold, the second valve is opened.

[0020] To achieve the above object and other related objects, the present application further provides a boiler blowdown system comprising the above-mentioned blowdown pump blowdown protection device.

[0021] Beneficial effects: when the blowdown pump is used to blow down the sewage with high temperature, the cooling pool is arranged to cool the sewage with high temperature discharged from the boiler, so as to prolong the service life of the blowdown pump; the cooling water pipe is arranged to cool the sewage with high temperature in the cooling pool, so that the sewage extracted by the blowdown pump is sewage with low temperature, such as 30℃ sewage, so as to further prolong the service life of the blowdown pump; the water injection pipe is connected between the cooling water pipe and the blowdown pump, so that when the siphon effect occurs after the blowdown pump finishes blowing down and stops, the stored water in the blowdown pump is completely discharged, the cooling water can be directly injected into the blowdown pump through the water injection pipe, so as to avoid the idle phenomenon of the blowdown pump due to the complete discharge of the stored water in the blowdown pump when the blowdown pump is started next time, and further avoid the problem that the blowdown pump cannot blow down when it is started. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to make the technical solutions of the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only need to be some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0023] Fig. 1 The overall structure of the present application is shown in the schematic diagram.

[0024] Fig. 2 The connection between the sewage pump and the anti-siphon water tank of the present application is shown in the schematic diagram.

[0025] Element number explanation: sewage pump 1, water inlet 11, discharge port 12, water injection hole 13, motor 14, idling detection sensor 15, water diversion pipe 2, cooling water pipe 3, first valve 31, cooling pool 4, water temperature sensor 41, water injection pipe 5, second valve 51, detachable section 52, first double-thread pipe 521, union joint 522, second double-thread pipe 523, anti-siphon water tank 6, first pipe 61, second pipe 62, third valve 63. DETAILED DESCRIPTION

[0026] The embodiments of the present application will be described below through specific, concrete examples, and those skilled in the art can easily understand other advantages and effects of the present application from the disclosure of the present specification. The present application can also be implemented or applied through other different specific embodiments, and each detail in the present specification can be modified or changed based on different views and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. It should also be understood that the terms used in the embodiments of the present application are for describing specific specific embodiments, and are not intended to limit the protection scope of the present application. The test methods in the following embodiments are not specified, and are usually performed under conventional conditions or under the conditions recommended by the manufacturers.

[0027] Please refer to Figs. 1-2It should be noted that the structure, proportion, size and the like shown in the drawings of the present specification are only used to cooperate with the content disclosed in the specification, so as to be understood and read by those skilled in the art, and do not have technical significance, and any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect and purpose of the present application, should still fall within the scope of the present application.

[0028] When the embodiments give a numerical range, it should be understood that, unless otherwise stated by the present application, each numerical range and any numerical value between the two endpoints can be selected. Unless otherwise defined, all technical and scientific terms used in the present application and the present application are also used with any method, equipment and material of the prior art similar or equivalent to the method, equipment, material described in the embodiments of the present application to realize the present application.

[0029] Please refer to Figs. 1-2 The present application provides a protection device for sewage pump sewage, comprising: a sewage pump 1, comprising a water inlet 11, a discharge port 12 and a water injection hole 13; a water guide pipe 2; a cooling water pipe 3;

[0030] A cooling pool 4 is connected with the water inlet 11 through the water guide pipe 2 at one end and connected with the cooling water pipe 3 at the other end;

[0031] A water injection pipe 5 is connected with the water injection hole 13 at one end and connected with the cooling water pipe 3 at the other end.

[0032] It should be noted that when the boiler or other equipment discharges sewage, the sewage is discharged into the sewage pool for purification and recycling, but when the sewage pump 1 discharges sewage with high temperature, many parts inside the sewage pump 1 cannot withstand the sewage with high temperature, such as 60℃ or 80℃, so that the sewage with high temperature will damage the sewage pump 1 to a certain extent, therefore, in order to ensure that the sewage pump 1 can be used for a long time and reduce the replacement frequency of the parts of the sewage pump 1, the sewage needs to be cooled by the cooling pool 4 before being pumped away by the sewage pump 1, and when the temperature is reduced to a set temperature, such as 30℃, the sewage is pumped away by the sewage pump 1;

[0033] Therefore, through the setting of the cooling pool 4, the service life of the sewage pump 1 can be prolonged;

[0034] Meanwhile, since the cooling pool 4 is generally arranged underground, the waste water discharged from the boiler can be directly introduced into the cooling pool 4, and the cooling pool 4 and the boiler do not need to be arranged with the blowdown pump 1; the blowdown pump 1 is generally arranged on the ground to pump the waste water in the cooling pool 4, and once the blowdown pump 1 stops, siphonage will occur, the water in the blowdown pump 1 will be pumped dry, and when the blowdown pump 1 is started again, since there is no water or little water in the blowdown pump 1, a vacuum state cannot be formed in the blowdown pump 1, so that the blowdown pump 1 cannot pump the waste water in the cooling pool 4, and thus the blowdown pump 1 is prone to idle running, and when no one finds that the blowdown pump 1 is in idle running, the blowdown pump 1 is in idle running for a long time, and since there is no fluid to take away the heat generated by the rotation of the blowdown pump 1 itself, the blowdown pump 1 itself is prone to be burned and damaged;

[0035] The cooling of the waste water by the cooling pool 4 is on one hand from the natural heat dissipation of the cooling pool 4 to the waste water with high temperature, and on the other hand is through the cooling water pipe 3 to discharge cooling water into the cooling pool 4 to cool the waste water with high temperature in the cooling pool 4, such as using clean water or previously cooled waste water as the cooling water; the cooling pool 4 is arranged underground, the blowdown pump 1 is arranged on the ground, the blowdown pump 1 pumps the waste water in the cooling pool 4 through the water guide pipe 2 and discharges the waste water through the discharge port 12; when the blowdown pump 1 stops working, due to siphonage, the water in the blowdown pump 1 will be discharged from the discharge port 12, so that when the blowdown pump 1 is started again, since there is no water in the blowdown pump 1, a negative pressure cannot be generated, and thus the newly generated waste water in the cooling pool 4 cannot be pumped away, therefore, the water injection pipe 5 is connected between the water injection hole 13 and the cooling water pipe 3, so that the water in the cooling water pipe 3 can be directly introduced into the blowdown pump 1, and the blowdown pump 1 can always be filled with sufficient water for the blowdown pump 1 to work normally, so that the siphonage problem of the blowdown pump 1 when discharging waste water is solved; when the blowdown pump 1 is not started, the excess cooling water in the blowdown pump 1 will overflow into the cooling pool 4 through the water guide pipe 2 and cool the waste water in the cooling pool 4.

[0036] Please refer to Figs. 1-2 As one of the embodiments of the present application, the protection device for blowdown of the blowdown pump further comprises a motor 14, the motor 14 is connected with the blowdown pump 1, and the motor 14 is used to drive the blowdown pump 1 to rotate.

[0037] Please refer to Figs. 1-2 As one of the embodiments of the present application, the water injection hole 13 is located beside the water inlet 11.

[0038] It should be noted that the water injection hole 13 is arranged beside the water inlet 11, so that the waste water with high temperature entering the water inlet 11 can be mixed with the cooling water with low temperature entering the water injection hole 13 in the first time, so that the temperature rise in the blowdown pump 1 can be better inhibited, and the blowdown pump 1 is protected to a certain extent.

[0039] Please see Figs. 1-2 As one embodiment of this case, the height of the water injection hole 13 is higher than the height of the water inlet 11, and the water injection hole 13 is located directly above the water inlet 11, so that the cooling water injected into the water injection hole 13 can directly spray onto the sewage at the water inlet 11, which is beneficial to further cooling the sewage entering the sewage pump 1, and thus beneficial to the long-term use of the sewage pump 1.

[0040] Please see Figs. 1-2 As one embodiment of this case, a first valve 31 is provided between the connection between the cooling water pipe 3 and the water injection pipe 5 and the cooling pool 4; a second valve 51 is provided on the water injection pipe 5.

[0041] It should be noted that when the sewage in the cooling pool 4 does not need to be cooled by cooling water, the first valve 31 can be closed. When the sewage in the cooling pool 4 does not need to be cooled by cooling water and there is sufficient water in the sewage pump 1, the first valve 31 and the second valve 51 can be closed. When the sewage pump 1 needs to be repaired, the sewage pump 1 should be turned off and the second valve 51 should be closed.

[0042] Please see Figs. 1-2 In one embodiment of this case, the second valve 51 is an intelligent control valve, and the second valve 51 is electrically connected to the sewage pump 1. When the sewage pump 1 is turned off and a first preset time has elapsed, the sewage pump 1 has undergone siphon action, and the water stored in the sewage pump 1 has been discharged. After the sewage pump 1 can no longer meet the normal sewage discharge operation, air will enter the sewage pump 1, so that the air pressure in the sewage pump 1 is normal and no longer meets the siphon condition. At this time, after the first preset time, the second valve 51 automatically opens for a second preset time. During the second preset time, the cooling water in the water injection pipe 5 will enter the sewage pump 1 through the second valve 51, so that the sewage pump 1 is filled with water, so that the sewage pump 1 can work normally when it is turned on again. When the existing intelligent control valve does not have a time setting function, a time relay or time controller can be added, and the time relay or time controller can be electrically connected to the sewage pump 1 and the second valve 51 to realize the time control function.

[0043] Please see Figs. 1-2 As one embodiment of this case, at least one of the cooling pool 4, the water inlet pipe 2, and the water inlet 11 is provided with a water temperature sensor 41; the first valve 31 is an intelligent control valve, and the water temperature sensor 41 is signal connected to the first valve 31.

[0044] It should be noted that the water temperature sensor 41 is a temperature sensor capable of sensing the water temperature in the prior art; the intelligent control valve itself has a controller, which can be connected with the water temperature sensor 41 through a wire signal or a wireless signal connection, and when the water temperature sensor 41 detects that the sewage temperature entering the sewage pump 1 reaches a set first threshold value, such as 45℃ or 50℃ or 70℃, the water temperature sensor 41 transmits the temperature signal to the intelligent control valve, and the intelligent control valve controls the first valve 31 to open through the controller carried by itself, so that the sewage in the cooling pool 4 can be quickly cooled.

[0045] Please refer to Figs. 1-2 , as one of the embodiments of the present case, the second valve 51 is an intelligent control valve; the sewage pump 1 is provided with an idle detection sensor 15, and the idle detection sensor 15 is electrically connected with the sewage pump 1 and the second valve 51.

[0046] It should be noted that the idle detection sensor 15 is a liquid level sensor or a pressure sensor; the sewage pump 1 is also provided with a time relay, and the time relay is electrically connected with the sewage pump 1. After the sewage pump 1 is opened, the idle detection sensor 15 is electrically connected with the sewage pump 1, so that the idle detection sensor 15 can work in advance, and the time relay delays the work of the sewage pump 1. When the idle detection sensor 15 detects that the sewage pump 1 is insufficient, the idle detection sensor 15 transmits the signal to the second valve 51, and the second valve 51 automatically opens and makes the cooling water flow into the sewage pump 1. When the idle detection sensor 15 detects that the sewage pump 1 is full of water, the second valve 51 is automatically closed, and at this time the sewage pump 1 starts to work formally.

[0047] Please refer to Figs. 1-2 , as one of the embodiments of the present case, the cooling water pipe 3 is communicated with the upper part of the cooling pool 4.

[0048] It should be noted that the sewage in the cooling pool 4 is generally higher in temperature at the upper part than at the lower part, and the cooling water pipe 3 is communicated with the upper part of the cooling pool 4, which is more conducive to the cooling of the sewage in the cooling pool 4.

[0049] Please refer to Figs. 1-2 , as one of the embodiments of the present case, the water inlet pipe 2 extends to the lower part of the cooling pool 4. Since the sewage temperature at the lower part of the cooling pool 4 is generally lower than that at the upper part of the cooling pool 4, the water inlet pipe 2 is extended to the lower part of the cooling pool 4, so as to facilitate the water inlet pipe 2 to extract the sewage with lower temperature in the cooling pool 4, thereby prolonging the service life of the sewage pump 1.

[0050] As one of the embodiments of the present application, the water inlet pipe 2 is provided with a filter screen at the end extending into the lower part of the cooling pool 4. By arranging the filter screen, the damage of the sewage pump 1 by large particles of dirt is avoided or reduced, thereby prolonging the working time of the sewage pump 1.

[0051] As one of the embodiments of the present application, the cooling pool 4 is provided with a stirring device near the water inlet pipe 2. The stirring device comprises stirring blades. On the one hand, the stirring device can promote the mixing and cooling of the cooling water and the sewage with higher temperature. On the other hand, the stirring device rotating at the water inlet pipe 2 can reduce or avoid the blockage of the filter screen at the end of the water inlet pipe 2.

[0052] Please refer to Figs. 1-2 As one of the embodiments of the present application, the water injection pipe 5 and the water inlet pipe 2 are detachably connected with the sewage pump 1.

[0053] It should be noted that by detachably connecting the water injection pipe 5 and the water inlet pipe 2 with the sewage pump 1, the sewage pump 1 can be conveniently detached for maintenance.

[0054] Please refer to Figs. 1-2 As one of the embodiments of the present application, the water injection pipe 5 comprises a detachable section 52 located between the second valve 51 and the water injection hole 13. The detachable section 52 comprises a first double-headed threaded pipe 521, a union joint 522 and a second double-headed threaded pipe 523, thereby facilitating the detachment between the water injection pipe 5 and the sewage pump 1, and further facilitating the maintenance of the sewage pump 1.

[0055] Please refer to Figs. 1-2 As one of the embodiments of the present application, the protection device of the sewage pump further comprises an anti-siphon water tank 6. The upper end of the anti-siphon water tank 6 is communicated with the water inlet pipe 2 through a first pipeline 61, and the first pipeline 61 is communicated with the highest position of the water inlet pipe 2, which is higher than the position of the water inlet 11. The lower end of the anti-siphon water tank 6 is communicated with the upper part of the sewage pump 1 through a second pipeline 62. The second pipeline 62 is provided with a third valve 63, which is arranged in an open state.

[0056] It should be noted that the height of the anti-siphon water tank 6 is limited, but the length and width of the anti-siphon water tank 6 will not be limited and can be designed as required, thereby increasing the volume in the anti-siphon water tank 6; the size of the opening of the third valve 63 is set according to the fluid flow rate in the second pipeline 62; when the sewage pump 1 starts to work, the sewage pump 1 draws the water in the cooling pool 4 through the water inlet pipe 2, and in this process, due to the height difference, part of the sewage will enter the anti-siphon water tank 6 and be stored until the anti-siphon water tank 6 is full; after the sewage pump 1 stops, under the action of siphon, the water in the sewage pump 1 is drawn out, and in this process, due to the height difference, the sewage in the anti-siphon water tank 6 will flow to the sewage pump 1, but due to the limitation of the size of the opening of the third valve 63, the sewage in the anti-siphon water tank 6 flows into the sewage pump 1 relatively slowly, until the water in the sewage pump 1 is discharged under the action of siphon and the sewage pump 1 is filled with air and no longer has the siphon effect, there is still a large amount of sewage in the anti-siphon water tank 6, and after a period of drainage through the second pipeline 62, most of the sewage in the anti-siphon water tank 6 will flow into the sewage pump 1, thereby being able to meet the re-starting of the sewage pump 1; especially when the second valve 51 fails to open after being closed, the anti-siphon water tank 6 can play a certain anti-siphon effect, and realize the normal work of the sewage pump 1 next time, and in this embodiment, the time period from the closing of the sewage pump 1 to the re-starting is longer than the time period for the water in the anti-siphon water tank 6 to flow into the sewage pump 1 and fill enough water.

[0057] Please refer to Figs. 1-2 The present application also provides a kind of sewage pump sewage anti-siphon method, be applied to the protection device of the sewage pump sewage described in this method, comprising the following steps:

[0058] When the water temperature sensor 41 detects that the water temperature is higher than the preset first threshold, the first valve 31 opens.

[0059] It should be noted that the water temperature sensor 41 is electrically connected with the first valve 31, and when the water temperature sensor 41 detects that the water temperature is higher than the preset first threshold, the first valve 31 obtains the water temperature signal and controls itself to open and work.

[0060] Please refer to Figs. 1-2 The present application also provides a kind of sewage pump sewage anti-siphon method, be applied to the protection device of the sewage pump sewage described in this method, comprising the following steps:

[0061] When the idling detection sensor 15 detects that the fluid amount in the sewage pump 1 is lower than the preset second threshold, the second valve 51 opens.

[0062] It needs to be explained that the idle detection sensor 15 is electrically connected with the second valve 51, when the idle detection sensor 15 detects that the fluid amount in the blowdown pump 1 is lower than the preset second threshold value, the idle detection sensor 15 transmits the detected signal to the second valve 51, and the controller in the second valve 51 controls the second valve 51 to open, the cooling water enters the blowdown pump 1 through the water injection pipe 5 and the second valve 51 and fills the blowdown pump 1, so that the blowdown pump 1 can normally perform the blowdown work.

[0063] Please refer to Figs. 1-2 The application further provides a method for preventing siphoning in blowdown of a cooling pool, comprising: connecting one end of the cooling pool 4 to the cooling water pipe 3, and connecting the other end to the blowdown pump 1 for blowdown; and connecting the water injection pipe 5 between the blowdown pump 1 and the cooling water pipe 3.

[0064] Please refer to Figs. 1-2 The application further provides a boiler blowdown system comprising the protection device for blowdown of the blowdown pump.

[0065] In summary, the application effectively overcomes some practical problems in the prior art, thereby having high utilization value and use significance.

[0066] The above embodiments only exemplarily illustrate the principles and effects of the application, and are not used to limit the application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought of the application should be covered by the claims of the application.

Claims

1. A protection device for the decontamination of a sewage pump, characterized in that, The application relates to a sewage pump protection device. The sewage pump comprises a water inlet, a discharge outlet and a water injection hole beside the water inlet; a water guide pipe; a cooling water pipe; a cooling pool, one end of which is communicated with the water inlet through the water guide pipe, and the other end of which is connected with the cooling water pipe; a water injection pipe, one end of which is communicated with the water injection hole, and the other end of which is communicated with the cooling water pipe, and the water injection pipe is provided with a second valve; an anti-siphon water tank, the upper end of the anti-siphon water tank is communicated with the water guide pipe through a first pipe, and the first pipe is communicated with the water guide pipe at a position higher than the water inlet; the lower end of the anti-siphon water tank is communicated with the upper part of the sewage pump through a second pipe. The sewage pump is provided with an idling detection sensor, the idling detection sensor is electrically connected with the sewage pump and the second valve, and the second valve is opened when the idling detection sensor detects that the fluid amount in the sewage pump is lower than a preset second threshold value. A first valve is arranged between the communication position of the cooling water pipe and the water injection pipe and the cooling pool. A water temperature sensor is arranged in at least one of the cooling pool, the water guide pipe and the water inlet; the first valve is an intelligent control valve, and the water temperature sensor is signal-connected with the first valve. The second valve is an intelligent control valve. The cooling water pipe is communicated with the upper part of the cooling pool. The water injection pipe and the water guide pipe are detachably connected with the sewage pump.

2. A protection device for the emptying of a waste pump according to claim 1, characterized in that: The first valve is opened when the water temperature sensor detects that the water temperature is higher than a preset first threshold value.

3. A protection device for the emptying of a waste pump according to claim 2, characterized in that: The sewage pump protection device comprises the sewage pump protection device in any one of claims 1-7.

4. The protection device for the sewage discharge of a sewage pump according to claim 2, characterized in that ​ 5. The protection device for the sewage discharge of a sewage pump according to claim 1, characterized in that ​ 6. A protection device for the emptying of a waste pump according to claim 1, characterized in that: ​ 7. A protection device for the emptying of a waste pump according to claim 3, characterized in that ​ 8. A boiler blowdown system characterized by, ​

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