Local supercharging device and circulating cooling water system

Abstract

The utility model belongs to the technical field of industrial circulating cooling water, and discloses a local supercharging device which comprises a hydraulic ram, a high-level water tank is arranged at a water outlet of a lifting pipe of the hydraulic ram, and a low-level water tank is arranged at a drain opening of the hydraulic ram. The utility model further discloses a circulating cooling water system with the local supercharging device, a power pipeline of the hydraulic ram is connected to a water lifting main pipe in the system, and a water outlet pipeline of the high-level water tank is connected to a branch pipeline between the high-level heat exchanger and the water lifting main pipe. And a water outlet pipeline of the low-level water tank is connected to a branch pipeline between the low-level heat exchanger and the water lifting main pipe. Water is supplied to the high-position heat exchanger with a small water consumption ratio in a local pressurization mode, the cooling problem of the high-position heat exchanger in a factory is solved, and meanwhile the energy consumption of a circulating cooling water system is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to industrial circulating cooling water technical field relates to partial pressure increasing device and circulating cooling water system. BACKGROUND

[0002] Industrial cooling water system is an important auxiliary system in modern industrial production, and the energy consumption of industrial cooling water system accounts for about 10% to 20% in the production energy consumption of chemical, metallurgical, electric power and other fields, and is the key field of enterprise quality and efficiency, energy saving and consumption reduction research.

[0003] Industrial cooling water system usually includes delivery pump, delivery pipe network, heat exchanger and cooling device, and the cooling water is driven to run back and forth by the pump, and the waste heat generated by the production equipment is taken away. In actual production, a set of industrial cooling water system is also often used to supply water to multiple device heat exchangers.

[0004] At present, many enterprises adopt intensive construction mode to reduce cost and improve output per unit area, usually set up multilayer frame to lay pipe network and raise the installation height of heat exchanger, and in some cases, the height of heat exchanger can reach 40m. The water required by such high-position heat exchanger Q 高 only accounts for a very small proportion of the total water consumption Q 总 of the entire cooling water system, but the highest-position heat exchanger determines the required head of the water supply pump. Because the energy consumption of the cooling water system water supply pump is determined by the cooling water output Q 总 of the pump, the head H raised and the efficiency η of the pump system, and its formula is P=Q 总 ×H÷η, therefore, most of the energy consumption of the water supply pump due to the head raised is wasted. Therefore, this is the place that needs to be improved for enterprise energy saving and consumption reduction. INVENTION CONTENTS

[0005] The utility model aims at providing partial pressure increasing device and circulating cooling water system, and the water supply to the high-position heat exchanger with very small water consumption ratio is realized through the partial pressure increasing mode, the cooling problem of the high-position heat exchanger of the factory is solved, and the energy consumption of the circulating cooling water system is reduced.

[0006] One technical scheme adopted by the utility model is partial pressure increasing device, including water hammer pump, the one-way valve is installed on the power pipeline of water hammer pump, and the adjusting valve one is installed on the water inlet pipeline communicated with the power pipeline;The high-position water tank that receives water is fixedly arranged at the water outlet of the water lifting pipe of water hammer pump, the adjusting valve two is installed on the water outlet pipeline of the high-position water tank, the low-position water tank that receives water is fixedly arranged at the water outlet of the water hammer pump, and the adjusting valve three is installed on the water outlet pipeline of the low-position water tank.

[0007] The utility model discloses a further characterized in that: the high -level water tank is equipped with float switch no.

[0008] The high -level water tank and low -level water tank are all communicated with the emergency water supply pipeline, one end of the emergency water supply pipeline away from the high -level water tank or low -level water tank is communicated with the external water source, the high -level water tank communicated emergency water supply pipeline is equipped with regulating valve six, and the low -level water tank communicated emergency water supply pipeline is equipped with regulating valve seven.

[0009] The utility model discloses a beneficial effect is: the utility model discloses a body pressure difference of water hammer pump realizes pumping water, thereby realizes to the circulating cooling water partial pressurization, can be used in circulating cooling water system, for the high -level heat exchanger of water supply pump lift not reaching realizes water supply.

[0010] The utility model discloses a further characterized in that: the high -level water tank is equipped with float switch no.

[0011] Another technical scheme of the utility model is: a circulating cooling water system, comprising the partial pressurization device in the above technical scheme, still include water supply pump, and the water supply pump is connected with cooling tower and several groups of heat exchangers through circulating water pipe network, and the several groups of heat exchangers are located at different heights respectively, and the water outlet of cooling tower is communicated with the water inlet of water supply pump, and the water outlet of water supply pump is connected with the water lifting main pipe, and the several groups of heat exchangers are connected in parallel between the water lifting main pipe and the water inlet of cooling tower through branch pipeline.

[0012] The power pipeline of water hammer pump is connected to the water lifting main pipe, among the several groups of heat exchangers, the high -level heat exchanger is all high -level heat exchanger in the position higher than water hammer pump and lower than high -level water tank, and the low -level heat exchanger is all low -level heat exchanger in the position lower than water hammer pump and low -level water tank, and the rest are all middle -level heat exchanger.

[0013] The water outlet pipeline of high -level water tank is connected to the branch pipeline between high -level heat exchanger and water lifting main pipe, and the water outlet pipeline of low -level water tank is connected to the branch pipeline between low -level heat exchanger and water lifting main pipe.

[0014] The utility model discloses a feature still lies in: the branch pipeline that the water raising main pipe is linked with each high -level heat exchanger, mid -position heat exchanger and low -level heat exchanger is all installed with manual valve.

[0015] The branch pipeline that high -level heat exchanger is connected, between water raising main pipe and manual valve still installs regulating valve four.The branch pipeline that low -level heat exchanger is connected, between water raising main pipe and manual valve still installs regulating valve five.

[0016] The communication position of the outlet pipeline of high -level water tank and the branch pipeline of high -level heat exchanger lies between high -level heat exchanger and its corresponding manual valve. The communication position of the outlet pipeline of low -level water tank and the branch pipeline of low -level heat exchanger lies between low -level heat exchanger and its corresponding manual valve.

[0017] The beneficial effects of the technical scheme are: through multiple valve control, can use the local pressure increasing device and conventional industrial cooling water system communication, also can realize the local pressure increasing device online cutting out isolation. 高 The high -level heat exchanger with very small proportion carries out water supply, solves the cooling problem of factory high -level heat exchanger, reduces the energy consumption of circulating cooling water system simultaneously. DRAWINGS

[0018] Figure 1 It is the structure schematic diagram of conventional industrial cooling water system in prior art;

[0019] Figure 2 It is the structure schematic diagram of local pressure increasing device in the utility model Figure 1 ;

[0020] Figure 3 It is the structure schematic diagram of local pressure increasing device in the utility model Figure 2 ;

[0021] Figure 4 It is the structure schematic diagram of circulating cooling water system in the utility model Figure 1 ;

[0022] Figure 5 It is the structure schematic diagram of circulating cooling water system in the utility model Figure 2 .

[0023] Fig. 1, water pump; 2, cooling tower; 3, water lifting main pipe; 4, high-level heat exchanger; 5, middle-level heat exchanger; 6, low-level heat exchanger; 7, manual valve; 8, regulating valve I; 9, check valve; 10, water hammer pump; 1001, power pipeline; 1002, water lifting pipe; 1003, water outlet; 11, high-level water tank; 12, regulating valve II; 13, float switch I; 14, low-level water tank; 15, regulating valve III; 16, float switch II; 17, regulating valve IV; 18, regulating valve V; 19, regulating valve VI; 20, regulating valve VII. DETAILED DESCRIPTION

[0024] The utility model will be explained in detail below in combination with the drawings and specific embodiments.

[0025] Embodiment 1:

[0026] As shown in Figure 4 and Figure 3 The partial pressurizing device of the utility model, including water hammer pump 10, the power pipeline 1001 of water hammer pump 10 is equipped with check valve 9, and the water inlet pipeline that the power pipeline 1001 is communicated is equipped with regulating valve I 8. The water outlet of the water lifting pipe 1002 of water hammer pump 10 is fixedly provided with the high-level water tank 11 that receives the falling water, and the water outlet pipeline of the high-level water tank 11 is equipped with regulating valve II 12. The water outlet 1003 of water hammer pump 10 is fixedly provided with the low-level water tank 14 that receives the falling water, and the water outlet pipeline of the low-level water tank 14 is equipped with regulating valve III 15.

[0027] Float switch I 13 is also installed in the high-level water tank 11, and float switch II 16 is also installed in the low-level water tank 14, and float switch I 13 and float switch II 16 are electrically connected with corresponding high-low liquid level alarm respectively.

[0028] In this embodiment, float switch I 13 and float switch II 16 can be selected as KOBOLD NML-310 liquid level sensor.

[0029] The working principle of this embodiment is as follows:

[0030] The partial pressurizing device of the utility model is used in the circulating cooling water system and is in the running state, wherein regulating valve I 8, regulating valve II 12 and regulating valve III 15 are all in the open state. The circulating cooling water output by water pump 1 flows to water hammer pump 10 through regulating valve I 8, and the circulating cooling water is divided at water hammer pump 10, one way is that the water pressure is increased and sent to high-level water tank 11, and the water in high-level water tank 11 is output through regulating valve II 12; the other way is that the water pressure is reduced and enters low-level water tank 14, and the water in low-level water tank 14 is output through regulating valve III 15. The utility model is provided with float switch I 13, float switch II 16 and high-low liquid level alarm, and when the liquid level in high-level water tank 11 or low-level water tank 14 is too high or too low, the alarm can be realized.

[0031] Embodiment 2:

[0032] As shown in Figure 5 and Figure 4 The utility model discloses a local pressure boosting device, wherein the high-level water tank 11 and the low-level water tank 14 are both communicated with the emergency water supply pipeline, the emergency water supply pipeline is connected with the external water source at the end far away from the high-level water tank 11 or the low-level water tank 14, the adjusting valve six 19 is installed on the emergency water supply pipeline communicated with the high-level water tank 11, and the adjusting valve seven 20 is installed on the emergency water supply pipeline communicated with the low-level water tank 14.

[0033] In the embodiment, when the local pressure boosting device fails and the high-low liquid level alarm corresponding to the high-level water tank 11 or the low-level water tank 14 sends the alarm information of the low liquid level, if the normal liquid level cannot be adjusted in a short time or the control switching of the valve one 8, the valve two 12 and the valve three 15 cannot be performed, the opening state of the adjusting valve six 19 or the adjusting valve seven 20 can be changed to supplement the cooling water to the high-level water tank 11 and the low-level water tank 14 in an emergency, so that the liquid level of the high-level water tank 11 or the low-level water tank 14 is restored to normal as soon as possible, the operation safety and stability of the circulating cooling water system are further ensured, and the emergency processing time is prolonged.

[0034] In the embodiment, the external water source connected with the emergency water supply pipeline can be the enterprise production water.

[0035] The working principle of the embodiment is the same as that of the embodiment 1, and will not be repeated.

[0036] Embodiment 3:

[0037] As shown in Figure 1 The utility model discloses a circulating cooling water system, which comprises the local pressure boosting device in the embodiment 1, and further comprises a water feeding pump 1, wherein the water feeding pump 1 is connected with a cooling tower 2 and a plurality of groups of heat exchangers through a circulating water pipe network, the plurality of groups of heat exchangers are located at different heights, the water outlet of the cooling tower 2 is communicated with the water inlet of the water feeding pump 1, the water outlet of the water feeding pump 1 is connected with a water lifting main pipe 3, and the plurality of groups of heat exchangers are connected in parallel between the water lifting main pipe 3 and the water inlet of the cooling tower 2 through corresponding branch pipelines.

[0038] In the local pressure boosting device, the power pipeline 1001 of the water hammer pump 10 is connected to the water lifting main pipe 3. In the plurality of groups of heat exchangers, the high-level heat exchangers 4 are located higher than the water hammer pump 10 and lower than the high-level water tank 11, the low-level heat exchangers 6 are located lower than the water hammer pump 10 and the low-level water tank 14, and the rest are the middle heat exchangers 5.

[0039] The outlet pipe of the high-level water tank 11 is connected to the branch pipe between the high-level heat exchanger 4 and the main water supply pipe 3, and the outlet pipe of the low-level water tank 14 is connected to the branch pipe between the low-level heat exchanger 6 and the main water supply pipe 3.

[0040] This embodiment is as follows: Figure 4 In the conventional industrial cooling water system shown, a local pressurization device as proposed in Example 1 is added. Water pump 1 draws cold water from the bottom of cooling tower 2. Driven by water pump 1, a portion of the industrial cooling water flows into some heat exchangers through the circulating water network, while another portion is pressurized by water hammer pump 10 to increase the water pressure of some output water. The pressurized cooling water is used to supply water to the heat exchangers at higher levels in the system, reducing the head required for water pump 1 in the industrial cooling water system. This solves the cooling problem of the high-level heat exchanger 4 and reduces the energy consumption of the industrial cooling water system. Furthermore, the water discharged from the drain port 1003 of water hammer pump 10, with reduced water pressure, can also be fully utilized to supply water to the low-level heat exchanger 6, ensuring that all heat exchangers at different heights in the circulating cooling water system can achieve normal heat exchange function.

[0041] The working principle of this embodiment is the same as that of Embodiment 1, and will not be repeated here.

[0042] Furthermore, in this embodiment, the head of the water pump 1 does not necessarily need to meet the requirements of the high-level heat exchanger 4. It can be achieved by locally boosting the water consumption Q, provided that the head of the pump 1 meets the requirements of the middle-level heat exchanger 5. 高 A small-scale high-level heat exchanger 4 supplies water. In this invention, the energy consumption P1 of the circulating cooling water system is significantly reduced compared to existing conventional industrial cooling water systems.

[0043] P1=Q 总 ×H1÷η, where H1 is the head required to be lifted by the water pump 1 in this utility model.

[0044] Since the head required for water pump 1 to be lifted decreases from H to H1, where H > H1, and the total water consumption Q in the circulating cooling water system... 总 If no change occurs, then P1 < P, where P is the energy consumption of a conventional industrial cooling water system. Based on preliminary calculations in practical applications, the energy consumption of the circulating cooling water system of this invention can be reduced by approximately 30% compared to existing conventional industrial cooling water systems.

[0045] Example 4:

[0046] like Figure 1 As shown, in the circulating cooling water system of this utility model, based on embodiment 3, manual valves 7 are installed on the branch pipes that connect the main water supply pipe 3 to each high-level heat exchanger 4, middle-level heat exchanger 5 and low-level heat exchanger 6.

[0047] The regulating valve four 17 is installed on the branch pipeline connected with the high-level heat exchanger 4, between the water-lifting main pipeline 3 and the corresponding manual valve 7.

[0048] The regulating valve five 18 is installed on the branch pipeline connected with the low-level heat exchanger 6, between the water-lifting main pipeline 3 and the corresponding manual valve 7.

[0049] In the circulating cooling water system in the embodiment, the regulating valve four 17 and the regulating valve five 18 are in the closed state in the normal operation condition, and the water pressure of the water inlet of the water hammer pump 10 power pipeline 1001 can be further increased relative to the open state, so that the water hammer pump 10 can better realize the pressurization of part of the circulating water and the sufficient and effective water supply of the high-level heat exchanger 4.

[0050] It should be noted that, in the existing conventional industrial cooling water system shown in the prior art, Figure 4 In the circulating cooling water system of the utility model, the manual valves 7 are also in the open state in the system operation process. However, in the circulating cooling water system of the utility model, the manual valves 7 in the branch pipelines where the high-level heat exchanger 4 and the low-level heat exchanger 6 are located do not play an obvious role.

[0051] Since the utility model is improved on the basis of the existing industrial cooling water system of the enterprise, in the improved scheme, that is, in the embodiment, the manual valves 7 in the circulating water pipe network are retained. However, if the enterprise constructs a new circulating cooling water system according to the scheme of the embodiment, the manual valves 7 in the branch pipelines where the high-level heat exchanger 4 and the low-level heat exchanger 6 are located can be removed, so as to simplify the system structure and save the production cost.

[0052] The working principle of the embodiment is the same as that of embodiment 3, and will not be described in detail.

[0053] Embodiment 5:

[0054] As shown in the prior art, Figure 5 On the basis of the embodiment 4, the utility model discloses a circulating cooling water system, the communication position of the water outlet pipeline of the high-level water tank 11 and the branch pipeline where the high-level heat exchanger 4 is located is located between the high-level heat exchanger 4 and the corresponding manual valve 7.

[0055] The communication position of the water outlet pipeline of the low-level water tank 14 and the branch pipeline where the low-level heat exchanger 6 is located is located between the low-level heat exchanger 6 and the corresponding manual valve 7.

[0056] It should be noted that if the enterprise constructs a new circulating cooling water system according to the technical solution of Embodiment 4, the manual valve 7 in the branch pipeline where the high-level heat exchanger 4 and the low-level heat exchanger 6 are located is removed, then in this embodiment, the communication position of the outlet pipeline of the high-level water tank 11 with the branch pipeline where the high-level heat exchanger 4 is located is between the high-level heat exchanger 4 and the regulating valve four 17. The communication position of the outlet pipeline of the low-level water tank 14 with the branch pipeline where the low-level heat exchanger 6 is located is between the low-level heat exchanger 6 and the regulating valve five 18.

[0057] During the operation of this embodiment, according to the alarm information of the high or low liquid level in the high-level water tank 11 or the low-level water tank 14 sent by the high or low liquid level alarm, the opening state of the regulating valve one 8, the regulating valve two 12, the regulating valve three 15, the regulating valve four 17 and the regulating valve five 18 needs to be adjusted accordingly, so that the circulating water flow in each high-level heat exchanger 4 and low-level heat exchanger 6 is always maintained, and the normal operation of the entire circulating cooling water system is ensured.

[0058] When the alarm information of the high liquid level in the high-level water tank 11 is sent, the regulating valve one 8 in the system needs to be adjusted from the open state to the closed state; if at this time, the alarm information of the low liquid level in the low-level water tank 14 is sent, the regulating valve three 15 in the system is further adjusted from the open state to the closed state, and the regulating valve five 18 is adjusted from the closed state to the open state, and the low-level heat exchanger 6 is directly supplied with water by the water supply pump 1. Until the liquid level in the high-level water tank 11 is at a normal height, the regulating valve one 8, the regulating valve three 15 and the regulating valve five 18 are all restored to the original operating state.

[0059] When the alarm information of the low liquid level in the high-level water tank 11 is sent, the regulating valve two 12 in the system needs to be adjusted from the open state to the closed state, and the regulating valve four 17 needs to be adjusted from the closed state to the open state, and at the same time, the water supply pump 1 in the system needs to be controlled to increase the lift, so as to directly supply water to the high-level heat exchanger 4. At this time, due to the increase of the system pressure, the flow rate of the regulating valve one 8 needs to be reduced, so that the flow rate through the water hammer pump 10 and the water outlet 1003 is reduced, so as to maintain the water level in the low-level water tank 14; if at this time, the alarm information of the high liquid level in the low-level water tank 14 is sent, the regulating valve one 8 in the system needs to be closed, and until the liquid level in the low-level water tank 14 decreases to a normal height, the regulating valve one 8 is controlled to be opened at a small flow rate again, and until the liquid level in the high-level water tank 11 is at a normal height, the regulating valve one 8, the regulating valve two 12, the regulating valve four 17 and the water supply pump 1 are all restored to the original operating state.

[0060] When the liquid level of the high water tank 11 is at the normal height, and the alarm information of the liquid level of the low water tank 14 being too high is sent out, the adjusting valve one 8 in the system needs to be closed to make the water outflow speed of the low water tank 14 greater than the water inflow speed, and the liquid level of the low water tank 14 is gradually lowered until the liquid level of the low water tank 14 is at the normal height, and the adjusting valve one 8 is restored to the original operation state.

[0061] When the liquid level of the high water tank 11 is at the normal height, and the alarm information of the liquid level of the low water tank 14 being too low is sent out, the adjusting valve three 15 in the system needs to be changed from the open state to the closed state, and the adjusting valve five 18 is changed from the closed state to the open state, until the liquid level of the low water tank 14 is at the normal height, and the adjusting valve three 15 and the adjusting valve five 18 are restored to the original operation state.

[0062] The working principle of the embodiment is the same as that of the embodiment 3, and will not be repeated.

[0063] Embodiment 6:

[0064] As shown in the embodiment 5, Figure 1 The circulating cooling water system of the utility model, including the local pressure boosting device in the above embodiment 2, other structures are same with embodiment 5.

[0065] The embodiment is in the conventional industrial cooling water system as shown in the embodiment 5, ​ The local pressure boosting device proposed in the embodiment 2 is added.

[0066] The working principle of the embodiment is the same as that of the embodiment 3, and will not be repeated.

Claims

1. A local pressure boosting device, characterized in that Including water hammer pump (10), the water hammer pump (10) power pipeline (1001) is installed with one-way valve (9), the power pipeline (1001) is installed with adjusting valve one (8) on the water inlet line communication;The water hammer pump (10) water-lifting pipe (1002) water outlet is fixedly provided with the high-level water tank (11) of receiving water, the water outlet line of the high-level water tank (11) is installed with adjusting valve two (12), the water hammer pump (10) drain (1003) is fixedly provided with the low-level water tank (14) of receiving water, the water outlet line of the low-level water tank (14) is installed with adjusting valve three (15).

2. The local supercharging device according to claim 1, characterized in that The high-level water tank (11) is installed with ball float switch one (13), the low-level water tank (14) is installed with ball float switch two (16), ball float switch one (13) and ball float switch two (16) are electrically connected with corresponding high-low liquid level alarm.

3. The local supercharging device according to claim 2, characterized in that The high-level water tank (11) and the low-level water tank (14) are all communicated with emergency water supply pipeline, the emergency water supply pipeline is connected with external water source away from the high-level water tank (11) or low-level water tank (14), the emergency water supply pipeline communicated with the high-level water tank (11) is installed with adjusting valve six (19), the emergency water supply pipeline communicated with the low-level water tank (14) is installed with adjusting valve seven (20).

4. A recirculating cooling water system characterised in that, Including the local booster device of any one of claims 1-3, further comprising a water supply pump (1), the water supply pump (1) is connected with a cooling tower (2) and a plurality of groups of heat exchangers through a circulating water pipe network, a plurality of groups of heat exchangers are located at different heights respectively, the water outlet of the cooling tower (2) is communicated with the water inlet of the water supply pump (1), the water outlet of the water supply pump (1) is connected with a water-lifting main pipe (3), a plurality of groups of heat exchangers are connected in parallel between the water-lifting main pipe (3) and the water inlet of the cooling tower (2) through branch pipelines; The power pipeline (1001) of the water hammer pump (10) is connected to the water-lifting main pipe (3), among a plurality of groups of heat exchangers, the high-level heat exchangers (4) are higher than the water hammer pump (10) and lower than the high-level water tank (11), the low-level heat exchangers (6) are lower than the water hammer pump (10) and the low-level water tank (14), and the rest are mid-level heat exchangers (5); The water outlet line of the high-level water tank (11) is connected to the branch pipeline between the high-level heat exchanger (4) and the water-lifting main pipe (3), and the water outlet line of the low-level water tank (14) is connected to the branch pipeline between the low-level heat exchanger (6) and the water-lifting main pipe (3).

5. The recirculating cooling water system of claim 4, wherein, Manual valves (7) are installed on the branch pipelines connected with the high-level heat exchangers (4), mid-level heat exchangers (5) and low-level heat exchangers (6) of the water-lifting main pipe (3) respectively; Adjusting valve four (17) is further installed on the branch pipeline connected with the high-level heat exchanger (4) between the water-lifting main pipe (3) and the manual valve (7); Adjusting valve five (18) is further installed on the branch pipeline connected with the low-level heat exchanger (6) between the water-lifting main pipe (3) and the manual valve (7).

6. The recirculating cooling water system of claim 5, wherein, The water outlet pipeline of the high-position water tank (11) is communicated with the branch pipeline where the high-position heat exchanger (4) is located, and the communication position is between the high-position heat exchanger (4) and the corresponding manual valve (7); The water outlet pipeline of the low-position water tank (14) is communicated with the branch pipeline where the low-position heat exchanger (6) is located, and the communication position is between the low-position heat exchanger (6) and the corresponding manual valve (7).

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