Water inlet control system of heat absorption source evaporator of water source heat pump

Abstract

The utility model discloses a water inlet control system of a heat absorption source evaporator of a water source heat pump. The water inlet control system comprises a plurality of vacuum cooling tanks, the multiple vacuum cooling tanks are connected to the water source heat pump in parallel. A pneumatic valve is arranged on a vacuum cooling water outlet pipe of each vacuum cooling tank; each vacuum cooling water outlet pipe is connected with a water outlet pipe and a water inlet pipe, the water outlet pipes are communicated with the water inlet side of the water source heat pump, and the water inlet pipes are communicated with the water outlet side of the water source heat pump; a pneumatic valve and a check valve are arranged on each water outlet pipe; and pneumatic valves are arranged on the water inlet pipes. Water inlet points collected by the water source heat pump evaporator are additionally arranged on the cooling reclaimed water outlet pipeline of the multiple plate frame vacuum cooling tanks, and the water taking valve is controlled according to the operation state of the plate frames to adjust a water inlet source so as to control a heat absorption source of the water source heat pump.

Description

Technical Field

[0001] The utility model relates to sewage treatment technology, and more specifically, to a water inlet control system for a heat absorption source evaporator of a water source heat pump. Background Art

[0002] The heat absorption source of the water source heat pump in the sewage treatment plant is the main process of the heat pump heating treatment of plate-frame low-temperature drying. The stability of the water inlet temperature of the heat absorption source evaporator of the water source heat pump plays a key role in determining the stability of the cooling water outlet temperature of the condenser of the water source heat pump.

[0003] Currently, the water inlet of the heat absorption source evaporator of the water source heat pump only takes the outlet water of the cooling intermediate water of 1 plate-frame vacuum cooling tank to achieve the purpose of heat extraction of the water source heat pump. Since the vacuum compressor is used to extract vacuum during the working stage of the plate-frame in sludge vacuum, the increase in the temperature of the cooling intermediate water in the vacuum cooling tank only occurs during the working stage of sludge vacuum, and the working time is only 2 hours to 2 hours and 30 minutes. The vacuum compressor is not used to extract sludge vacuum during feeding, pressing, heating, back blowing, and discharging, and these working stages take 4 hours to 4 hours and 30 minutes. The outlet water temperature of the cooling intermediate water in the plate-frame vacuum cooling tank is the intermediate water temperature. This causes the water inlet temperature of the heat absorption source evaporator of the water source heat pump to change, affecting the stability of the cooling water outlet temperature of the condenser of the water source heat pump. At the same time, in order to make the cooling water outlet temperature of the condenser reach our set value, the water source heat pump compressor increases its power or starts and operates another compressor, resulting in an increase in operating costs and an increase in safety risks. During the operation process, it is gradually found that there are certain defects in the initial design, and a series of problems caused by this defect are becoming increasingly prominent. Therefore, changing the design defects existing in the existing facilities has become a technical problem that the sewage treatment plant urgently needs to solve and improve. Summary of the Utility Model

[0004] Aiming at the defects existing in the prior art, the purpose of the utility model is to provide a water inlet control system for a heat absorption source evaporator of a water source heat pump. By adding water inlet points collected by the water source heat pump evaporator on the cooling intermediate water outlet pipes of multiple plate-frame vacuum cooling tanks, and controlling the water intake valves according to the operating state of the plate-frame to adjust the water source, the heat absorption source of the water source heat pump is controlled.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A water inlet control system for a heat absorption source evaporator of a water source heat pump includes multiple vacuum cooling tanks;

[0007] Multiple said vacuum cooling tanks are connected in parallel to the water source heat pump;

[0008] An air-operated valve is provided on the vacuum cooling water outlet pipe of each said vacuum cooling tank;

[0009] An outlet pipe and an inlet pipe are connected to each of the vacuum cooling water outlet pipes. Each of the outlet pipes is communicated with the water inlet side of the water source heat pump, and each of the inlet pipes is communicated with the water outlet side of the water source heat pump;

[0010] A pneumatic valve and a check valve are provided on each of the outlet pipes;

[0011] A pneumatic valve is provided on each of the inlet pipes.

[0012] Preferably, there are 4 vacuum cooling tanks, namely No. 1 vacuum cooling tank, No. 2 vacuum cooling tank, No. 3 vacuum cooling tank and No. 4 vacuum cooling tank.

[0013] Preferably, a first vacuum cooling water outlet pipe is connected to the No. 1 vacuum cooling tank;

[0014] A first pneumatic valve is provided on the first vacuum cooling water outlet pipe;

[0015] A first outlet pipe and a first inlet pipe are connected to the first vacuum cooling water outlet pipe. The first outlet pipe is communicated with the water inlet side of the water source heat pump, and the first inlet pipe is communicated with the water outlet side of the water source heat pump;

[0016] A second pneumatic valve and a first check valve are provided on the first outlet pipe;

[0017] A third pneumatic valve is provided on the first inlet pipe.

[0018] Preferably, a second vacuum cooling water outlet pipe is connected to the No. 2 vacuum cooling tank;

[0019] A fourth pneumatic valve is provided on the second vacuum cooling water outlet pipe;

[0020] A second outlet pipe and a second inlet pipe are connected to the second vacuum cooling water outlet pipe. The second outlet pipe is communicated with the water inlet side of the water source heat pump, and the second inlet pipe is communicated with the water outlet side of the water source heat pump;

[0021] A fifth pneumatic valve and a second check valve are provided on the second outlet pipe;

[0022] A sixth pneumatic valve is provided on the second inlet pipe.

[0023] Preferably, a third vacuum cooling water outlet pipe is connected to the No. 3 vacuum cooling tank;

[0024] A seventh pneumatic valve is provided on the third vacuum cooling water outlet pipe;

[0025] A third outlet pipe and a third inlet pipe are connected to the third vacuum cooling water outlet pipe. The third outlet pipe is communicated with the water inlet side of the water source heat pump, and the third inlet pipe is communicated with the water outlet side of the water source heat pump;

[0026] An eighth pneumatic valve and a third check valve are provided on the third water outlet pipe;

[0027] A ninth pneumatic valve is provided on the third water inlet pipe.

[0028] Preferably, a fourth vacuum cooling water outlet pipe is connected to the No. 4 vacuum cooling tank;

[0029] A tenth pneumatic valve is provided on the fourth vacuum cooling water outlet pipe;

[0030] A fourth water outlet pipe and a fourth water inlet pipe are connected to the fourth vacuum cooling water outlet pipe. The fourth water outlet pipe is communicated with the water inlet side of the water source heat pump, and the fourth water inlet pipe is communicated with the water outlet side of the water source heat pump;

[0031] An eleventh pneumatic valve and a fourth check valve are provided on the fourth water outlet pipe;

[0032] A twelfth pneumatic valve is provided on the fourth water inlet pipe.

[0033] Preferably, the pneumatic valves are set to be interlocked.

[0034] The water inlet control system of a water source heat pump heat absorption source evaporator provided by the present utility model effectively improves the defects in the original design, solves the problem that the water inlet temperature of the water source heat pump heat absorption source evaporator changes, affecting the stability of the cooling water outlet temperature of the water source heat pump condenser. At the same time, in order for the cooling water outlet temperature of the condenser to reach the predetermined set value, the water source heat pump compressor increases its power or starts and operates another compressor, resulting in an increase in operating costs and an increase in safety risks. At the same time, the present utility model is simple and convenient to maintain, only requiring daily computer monitoring and inspection. Finally, after the present utility model is used, the instability of the heat source temperature is eliminated, and the electricity cost of the equipment is greatly reduced, achieving the effect of cost reduction and efficiency increase. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic structural framework diagram of the water inlet control system of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] In order to better understand the above technical solutions of the present utility model, the technical solutions of the present utility model will be further described below with reference to the drawings and embodiments.

[0037] Combined with Figure 1 As shown, a water inlet control system of a water source heat pump heat absorption source evaporator provided by the present utility model includes a plurality of vacuum cooling tanks.

[0038] The plurality of vacuum cooling tanks are connected in parallel to the water source heat pump 21.

[0039] A pneumatic valve is provided on the vacuum cooling water outlet pipe of each vacuum cooling tank.

[0040] An outlet pipe and an inlet pipe are connected to the vacuum cooling water outlet pipe. The outlet pipes are all connected to the water inlet side 22 of the water source heat pump 21, and the inlet pipes are all connected to the water outlet side 23 of the water source heat pump 21.

[0041] A pneumatic valve and a check valve are provided on each outlet pipe.

[0042] A pneumatic valve is provided on each inlet pipe.

[0043] In the embodiment of the water inlet control system of the present utility model, a total of 4 vacuum cooling tanks are provided, namely the No. 1 vacuum cooling tank 1, the No. 2 vacuum cooling tank 6, the No. 3 vacuum cooling tank 11, and the No. 4 vacuum cooling tank 16.

[0044] A first vacuum cooling water outlet pipe 25 is connected to the No. 1 vacuum cooling tank 1.

[0045] A first pneumatic valve 3 is provided on the first vacuum cooling water outlet pipe 25.

[0046] A first outlet pipe 26 and a first inlet pipe 27 are connected to the first vacuum cooling water outlet pipe 25. The first outlet pipe 26 is connected to the water inlet side 22 of the water source heat pump 21, and the first inlet pipe 27 is connected to the water outlet side 23 of the water source heat pump 21.

[0047] A second pneumatic valve 2 and a first check valve 5 are successively provided on the first outlet pipe 26.

[0048] A third pneumatic valve 4 is provided on the first inlet pipe 27.

[0049] A second vacuum cooling water outlet pipe 28 is connected to the No. 2 vacuum cooling tank 6.

[0050] A fourth pneumatic valve 8 is provided on the second vacuum cooling water outlet pipe 28.

[0051] A second outlet pipe 29 and a second inlet pipe 30 are connected to the second vacuum cooling water outlet pipe 28. The second outlet pipe 29 is connected to the water inlet side 22 of the water source heat pump 21, and the second inlet pipe 30 is connected to the water outlet side 23 of the water source heat pump 21.

[0052] A fifth pneumatic valve 7 and a second check valve 10 are successively provided on the second outlet pipe 29.

[0053] A sixth pneumatic valve 9 is provided on the second inlet pipe 30.

[0054] A third vacuum cooling water outlet pipe 31 is connected to the No. 3 vacuum cooling tank 11.

[0055] A seventh pneumatic valve 13 is provided on the third vacuum cooling water outlet pipe 31.

[0056] A third vacuum cooling water outlet pipe 31 is connected to a third outlet pipe 32 and a third inlet pipe 33. The third outlet pipe 32 communicates with the water inlet side 22 of the water source heat pump 21, and the third inlet pipe 33 communicates with the water outlet side 23 of the water source heat pump 21.

[0057] An eighth pneumatic valve 12 and a third check valve 15 are successively arranged on the third outlet pipe 32.

[0058] A ninth pneumatic valve 14 is arranged on the third inlet pipe 33.

[0059] A fourth vacuum cooling water outlet pipe 24 is connected to the 4th vacuum cooling tank 16.

[0060] A tenth pneumatic valve 18 is arranged on the fourth vacuum cooling water outlet pipe 24.

[0061] The fourth vacuum cooling water outlet pipe 24 is connected to a fourth outlet pipe 34 and a fourth inlet pipe 35. The fourth outlet pipe 34 communicates with the water inlet side 22 of the water source heat pump 21, and the fourth inlet pipe 35 communicates with the water outlet side 23 of the water source heat pump 21.

[0062] An eleventh pneumatic valve 17 and a fourth check valve 20 are successively arranged on the fourth outlet pipe 34.

[0063] A twelfth pneumatic valve 19 is arranged on the fourth inlet pipe 35.

[0064] Linkage control is performed among the first pneumatic valve 3 to the twelfth pneumatic valve 19 to realize controlling which operation plate frame the water inlet of the heat source evaporator of the water source heat pump is taken from the cooled middle water outlet in the corresponding vacuum cooling tank under the vacuum working state.

[0065] Combined with Figure 1 shown, the working principle of the water inlet control system of the present utility model is as follows:

[0066] When the 1st vacuum cooling tank 1 operates in the working stage of sludge vacuum, the first pneumatic valve 3 is in the closed state, the second pneumatic valve 2 and the third pneumatic valve 4 are in the open state, and the water source heat pump 21 uses the water inlet heated by the 1st vacuum cooling tank 1. At the same time, the corresponding fourth pneumatic valve 8, seventh pneumatic valve 13, and tenth pneumatic valve 18 on the 2nd vacuum cooling tank 6, 3rd vacuum cooling tank 11, and 4th vacuum cooling tank 16 are in the open state; the fifth pneumatic valve 7, sixth pneumatic valve 9, eighth pneumatic valve 12, ninth pneumatic valve 14, eleventh pneumatic valve 17, and twelfth pneumatic valve 19 are in the closed state.

[0067] When the No. 1 vacuum cooling tank 1 stops, check whether the No. 2 vacuum cooling tank 6, the No. 3 vacuum cooling tank 11, and the No. 4 vacuum cooling tank 16 are in the vacuum working stage. For example, if the No. 2 vacuum cooling tank 6 is cooling the vacuum hot gas, then:

[0068] 1) Open the fifth pneumatic valve 7;

[0069] 2) After the fifth pneumatic valve 7 is fully opened, close the fourth pneumatic valve 8;

[0070] 3) After the fourth pneumatic valve 8 is closed, turn off the cooling water pump of the No. 1 vacuum cooling tank 1;

[0071] 4) The first check valve 5 closes;

[0072] 5) After the first check valve 5 closes, close the second pneumatic valve 2 and open the sixth pneumatic valve 9;

[0073] 6) After the second pneumatic valve 2 closes and the sixth pneumatic valve 9 opens, close the third pneumatic valve 4;

[0074] 7) After the third pneumatic valve 4 closes, open the first pneumatic valve 3 to prepare for cooling the vacuum hot gas for the No. 1 vacuum cooling tank 1.

[0075] When the No. 2 vacuum cooling tank 6 stops, check whether the No. 1 vacuum cooling tank 1, the No. 3 vacuum cooling tank 11, and the No. 4 vacuum cooling tank 16 are in the vacuum working stage. For example, if the No. 4 vacuum cooling tank 16 is cooling the vacuum hot gas, then:

[0076] 1) Open the eleventh pneumatic valve 17;

[0077] 2) After the eleventh pneumatic valve 17 is fully opened, close the tenth pneumatic valve 18;

[0078] 3) After the tenth pneumatic valve 18 closes, turn off the cooling water pump of the No. 2 vacuum cooling tank 6;

[0079] 4) The second check valve 10 closes;

[0080] 5) After the second check valve 10 closes, close the fifth pneumatic valve 7 and open the twelfth pneumatic valve 19;

[0081] 6) After the fifth pneumatic valve 7 closes and the twelfth pneumatic valve 19 opens, close the sixth pneumatic valve 9;

[0082] 7) After the sixth pneumatic valve 9 closes, open the fourth pneumatic valve 8 to prepare for cooling the vacuum hot gas for the No. 2 vacuum cooling tank 6.

[0083] This cycle controls the inlet water of the water source heat pump evaporator after being heated by vacuum cooling water. It ensures the stability of the heat absorption source temperature of the water source heat pump and reduces the change in the inlet water temperature of the heat absorption source evaporator.

[0084] Those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. As long as within the scope of the essential spirit of the present invention, changes and modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A water inlet control system for a water source heat pump heat source evaporator, characterized in that: including a plurality of vacuum cooling tanks; A plurality of the vacuum cooling tanks are connected in parallel to the water source heat pump; A pneumatic valve is provided on the vacuum cooling water outlet pipe of each vacuum cooling tank; The vacuum cooling water outlet pipe is connected to an outlet pipe and an inlet pipe, the outlet pipe is connected to the water inlet side of the water source heat pump, and the inlet pipe is connected to the water outlet side of the water source heat pump; The water outlet pipes are provided with pneumatic valves and check valves; The water inlet pipes are all provided with pneumatic valves.

2. The water inlet control system of the water source heat pump heat absorption source evaporator according to claim 1 is characterized in that: There are four vacuum cooling tanks, namely vacuum cooling tank No. 1, vacuum cooling tank No. 2, vacuum cooling tank No. 3 and vacuum cooling tank No.

4.

3. The water inlet control system of the water source heat pump heat absorption source evaporator according to claim 2 is characterized in that: The No. 1 vacuum cooling tank is connected to a first vacuum cooling water outlet pipe; The first vacuum cooling water outlet pipe is provided with a first pneumatic valve; The first vacuum cooling water outlet pipe is connected to a first water outlet pipe and a first water inlet pipe, the first water outlet pipe is communicated with the water inlet side of the water source heat pump, and the first water inlet pipe is communicated with the water outlet side of the water source heat pump; The first water outlet pipe is provided with a second pneumatic valve and a first check valve; The first water inlet pipe is provided with a third pneumatic valve.

4. The water inlet control system of the water source heat pump heat absorption source evaporator according to claim 2, characterized in that: The No. 2 vacuum cooling tank is connected to a second vacuum cooling water outlet pipe; A fourth pneumatic valve is provided on the second vacuum cooling water outlet pipe; The second vacuum cooling water outlet pipe is connected to a second water outlet pipe and a second water inlet pipe, the second water outlet pipe is communicated with the water inlet side of the water source heat pump, and the second water inlet pipe is communicated with the water outlet side of the water source heat pump; The second water outlet pipe is provided with a fifth pneumatic valve and a second check valve; The second water inlet pipe is provided with a sixth pneumatic valve.

5. The water inlet control system of the water source heat pump heat absorption source evaporator according to claim 2, characterized in that: The No. 3 vacuum cooling tank is connected to a third vacuum cooling water outlet pipe; The third vacuum cooling water outlet pipe is provided with a seventh pneumatic valve; The third vacuum cooling water outlet pipe is connected to a third water outlet pipe and a third water inlet pipe, the third water outlet pipe is connected to the water inlet side of the water source heat pump, and the third water inlet pipe is connected to the water outlet side of the water source heat pump; The third water outlet pipe is provided with an eighth pneumatic valve and a third check valve; The third water inlet pipe is provided with a ninth pneumatic valve.

6. The water inlet control system of the water source heat pump heat absorption source evaporator according to claim 2, characterized in that: The No. 4 vacuum cooling tank is connected to a fourth vacuum cooling water outlet pipe; The fourth vacuum cooling water outlet pipe is provided with a tenth pneumatic valve; The fourth vacuum cooling water outlet pipe is connected to a fourth water outlet pipe and a fourth water inlet pipe, the fourth water outlet pipe is in communication with the water inlet side of the water source heat pump, and the fourth water inlet pipe is in communication with the water outlet side of the water source heat pump; The fourth water outlet pipe is provided with an eleventh pneumatic valve and a fourth check valve; A twelfth pneumatic valve is provided on the fourth water inlet pipe.

7. The water inlet control system of the water source heat pump heat absorption source evaporator according to claim 1, characterized in that: The pneumatic valves are arranged to be linked.

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