Waste heat power generation circulating water adjusting device

Abstract

The utility model relates to the technical field of circulating water adjustment, in particular to a waste heat power generation circulating water adjusting device. According to the invention, the fluctuation adjustment of the amount of circulating water, water pressure and water temperature can be realized without increasing the number of original cooling towers, the construction process is simple, and the construction cost is low; comprising a reservoir, a cooling tower mounted on the reservoir and a first circulating pump for supplying water to the cooling tower, the system further comprises a second circulating pump and a plate heat exchanger, the output end of the first circulating pump is communicated with the flow inlet end of the plate heat exchanger, and the flow outlet end of the plate heat exchanger is communicated with the water inlet end of the cooling tower. The input end of the second circulating pump is communicated with the interior of the reservoir, the output end of the second circulating pump is communicated with the other inflow end of the plate heat exchanger, and a heat supply pipe is arranged at the other outflow end of the plate heat exchanger.

Description

Technical Field

[0001] The utility model relates to the technical field of circulating water regulation, in particular to a waste heat power generation circulating water regulating device. Background Art

[0002] As we all know, cooling towers are devices that use water as a circulating coolant, absorbing heat from a system and discharging it into the atmosphere to reduce the water temperature. During the initial design phase of a cooling tower, precise calculations are made for water temperature, water pressure, and water volume to be processed. Excessive fluctuations in water temperature or volume can cause the cooling tower's return water temperature to be too high, impacting the circulating water's ability to cool various equipment within the plant.

[0003] During the plant upgrade and renovation process, some plant areas will add waste heat power generation equipment at a later stage. The circulating water flow for waste heat power generation is sufficient, and the water temperature and water pressure are high; this will undoubtedly have an impact on the subsequent circulating water cooling tower; and the cooling tower occupies a large area, the construction process is complex, and the investment cost of new construction is high; therefore, on the basis of the original cooling tower, it is urgent to increase the water volume and water pressure processing capacity of the cooling tower and the problem of receiving water temperature higher than the design of the cooling tower. Utility Model Content

[0004] In response to the shortcomings of the existing technology, the utility model provides a waste heat power generation circulating water regulating device which can adjust the fluctuations of circulating water volume, water pressure and water temperature without adding the original cooling towers, has simple construction process and low construction cost.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a waste heat power generation circulating water regulating device, comprising a water reservoir, a cooling tower installed on the water reservoir, and a first circulating pump supplying water to the cooling tower; further comprising a second circulating pump and a plate heat exchanger, wherein the output end of the first circulating pump is connected to an inlet end of the plate heat exchanger, and an outlet end of the plate heat exchanger is connected to the water inlet end of the cooling tower; the input end of the second circulating pump is connected to the interior of the water reservoir, the output end of the second circulating pump is connected to the other inlet end of the plate heat exchanger, and a heat supply pipe is provided at the other outlet end of the plate heat exchanger.

[0006] Preferably, it also includes a filter pressure reducer installed at the outlet end of the first circulation pump and the second circulation pump, the filter pressure reducer includes a four-way valve, a cylinder arranged at the bottom of the four-way valve and communicating with the inside of the four-way valve, and a pressure reducing filter installed in the cylinder for up and down sliding, the pressure reducing filter includes an inner cylinder, a piston fixedly installed at the bottom of the inner cylinder and fitting with the inner wall of the cylinder and the inner wall of the upper pipe of the four-way valve, a limiting ring is provided on the inner wall of the upper pipe of the four-way valve; the inner cylinder is provided with an opening and a filter portion corresponding to the horizontal pipe on the four-way valve; further, the inner diameter of the limiting ring is smaller than the outer diameter of the piston, and the filter portion is composed of multiple filter holes; in this embodiment, the maximum water pressure of the outlet water of the first circulation pump and the second circulation pump should be lower than 0.4 MPa.

[0007] Preferably, a spring is installed at the bottom of the piston, one end of the spring abuts against the piston, and the other end of the spring abuts against the bottom wall of the cylinder.

[0008] Preferably, a sealing blind plate is provided on the top of the inner cylinder, and the sealing blind plate is detachably connected to the cross-joint by bolts.

[0009] Preferably, a pull ring is provided on the top of the sealing blind plate.

[0010] Preferably, a cold water make-up pump is further included, and the input end of the cold water make-up pump is connected to the water inlet end of the cooling tower.

[0011] Preferably, the first circulation pump, the second circulation pump, the plate heat exchanger and the cold water make-up pump are each in two groups; further, the two groups of first circulation pumps, the two groups of second circulation pumps, the two groups of plate heat exchangers and the two groups of cold water make-up pumps serve as backup for each other.

[0012] Compared with the prior art, the present invention provides a waste heat power generation circulating water regulating device, which has the following beneficial effects: the waste heat power generation circulating water regulating device, the waste heat power generation circulating water enters the plate heat exchanger through the first circulating pump, the plate heat exchanger has a large local resistance coefficient, so the water pressure flowing through the plate heat exchanger is reduced, and part of the circulating water cooled in the water reservoir is injected into the plate heat exchanger through the second circulating pump. The pumping volume of the second circulating pump is the same as the increase in the water volume of the waste heat power generation circulating water. When part of the circulating water in the water reservoir enters the plate heat exchanger, After absorbing heat, this part of circulating water is discharged through the heating pipe and used for heating the factory area, thereby reducing the inlet water temperature entering the cooling tower. In this way, when the water volume, water pressure and water temperature of the waste heat power generation circulating water are increased, there is no need to build an additional cooling tower to achieve the reduction of the cooling tower inlet water pressure and water temperature. Through the second circulating pump, the excess water in the water reservoir can be discharged after absorbing heat, so as to achieve the adjustment of the fluctuations of the increased circulating water volume, water pressure and water temperature, and make full use of the circulating water thermal energy. Compared with building an additional cooling tower, the construction process is simpler and the construction cost is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural diagram of the utility model.

[0014] Figure 2 It is a schematic diagram of the three-dimensional structure of the filter pressure reducer of the present utility model.

[0015] Figure 3 It is a schematic diagram of the plane structure of the filter pressure reducer of the present utility model.

[0016] Figure 4 This utility model Figure 3 Schematic diagram of the cross-sectional structure at AA in the middle.

[0017] Markings in the attached figure: 1. Water reservoir; 2. Cooling tower; 3. First circulation pump; 4. Second circulation pump; 5. Plate heat exchanger; 6. Heating pipe; 7. Filter pressure reducer; 8. Cross; 9. Cylinder; 10. Inner cylinder; 11. Piston; 12. Limiting ring; 13. Opening; 14. Filter part; 15. Spring; 16. Sealing blind plate; 17. Pull ring; 18. Cold water make-up pump. DETAILED DESCRIPTION

[0018] In order to help those skilled in the art better understand the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0019] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0020] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions therein can be combined with each other.

[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0022] Please refer to Figure 1A waste heat power generation circulating water regulating device includes a water reservoir 1, a cooling tower 2 installed on the water reservoir 1 and a first circulating pump 3 for supplying water to the cooling tower 2; it also includes a second circulating pump 4 and a plate heat exchanger 5, the output end of the first circulating pump 3 is connected to one inlet end of the plate heat exchanger 5, and one outlet end of the plate heat exchanger 5 is connected to the water inlet end of the cooling tower 2; the input end of the second circulating pump 4 is connected to the inside of the water reservoir 1, and the output end of the second circulating pump 4 is connected to the other inlet end of the plate heat exchanger 5, and a heat supply pipe 6 is provided at the other outlet end of the plate heat exchanger 5.

[0023] Please refer to Figure 2-4 , also includes a filter pressure reducer 7 installed at the outflow end of the first circulation pump 3 and the second circulation pump 4, the filter pressure reducer 7 includes a four-way 8, a cylinder 9 arranged at the bottom of the four-way 8 and communicating with the inside of the four-way 8, and a pressure reducing filter installed in the cylinder 9 for upward and downward sliding. The pressure reducing filter includes an inner cylinder 10, a piston 11 fixedly installed at the bottom of the inner cylinder 10 and fitting with the inner wall of the cylinder 9 and the inner wall of the upper pipe of the four-way 8, a limiting ring 12 is provided on the inner wall of the upper pipe of the four-way 8; the inner cylinder 10 is provided with an opening 13 corresponding to the horizontal pipe on the four-way 8 and a filter part 14; further, the inner diameter of the limiting ring 12 is smaller than the outer diameter of the piston 11, and the filter part 14 is composed of a plurality of filter holes.

[0024] In this embodiment, the maximum outlet pressure of the first and second circulating pumps 3 and 4 should be less than 0.4 MPa to ensure smooth installation of the inner tube 10 within the cylindrical body 9. A blind sealing plate 16 is provided at the top of the inner tube 10. This blind sealing plate 16 is detachably connected to the cross-joint 8 via bolts. A pull ring 17 is provided at the top of the blind sealing plate 16.

[0025] A spring 15 is installed at the bottom of the piston 11 , one end of the spring 15 abuts against the piston 11 , and the other end of the spring 15 abuts against the inner bottom wall of the cylinder 9 .

[0026] In the waste heat power generation circulating water regulating device provided in this embodiment, during the operation of the first circulating pump 3 and the second circulating pump 4, water flows through the horizontal pipe of the cross-way 8 and enters the opening 13 of the inner cylinder 10. Under the action of the filter 14, impurities in the water flow are filtered and intercepted and then fall to the bottom of the inner cylinder 10. When the impurities in the inner cylinder 10 need to be cleaned, the blocking blind plate 16 is detached from the cross-way 8. Under the action of the spring 15, the inner cylinder 10 moves upward until the piston 11 enters the upper pipe of the cross-way 8 and contacts the limiting ring 12. The piston 11 completely blocks the upper pipe of the four-way 8. At this time, the opening 13 of the inner tube 10 is exposed, and the impurities accumulated in the inner tube 10 are cleaned. The first circulating pump 3 and the second circulating pump 4 do not need to be shut down to clean the impurities trapped inside the inner tube 10. Under the action of the filter pressure reducer 7, the water pressure of the circulating water can be further reduced to avoid the impact of high water pressure on the cooling tower 2; the pull ring 17 can provide the operator with a better fulcrum, so that the blocking blind plate 16 and the inner tube 10 can be lifted more conveniently.

[0027] Specifically, it also includes a cold water make-up pump 18, the input end of the cold water make-up pump 18 is connected to the water inlet end of the cooling tower 2; when the inlet water temperature of the circulating water is too high and / or the water volume of the circulating water evaporates too much and the water volume decreases, the cold water make-up pump 18 can be used to supplement the low-temperature water source to the water inlet of the cooling tower 2, further adjust the inlet water temperature of the cooling tower 2, and also supplement the circulation volume of the circulating water.

[0028] There are two groups of the first circulation pump 3, the second circulation pump 4, the plate heat exchanger 5 and the cold water make-up pump 18; further, the two groups of the first circulation pump 3, the two groups of the second circulation pump 4, the two groups of the plate heat exchanger 5 and the two groups of the cold water make-up pump 18 serve as backup for each other; the above equipment is set up in two groups. When one of the groups fails, the other group of backup equipment is directly activated to keep the circulating water in a circulating flow state, so as to ensure a continuous supply of circulating water in the factory area.

[0029] The use process of the waste heat power generation circulating water regulating device provided by the present invention is as follows: the waste heat power generation circulating water enters the plate heat exchanger 5 through the first circulating pump 3. The plate heat exchanger 5 has a large local resistance coefficient, so the water pressure flowing through the plate heat exchanger 5 is reduced, and part of the circulating water cooled in the water reservoir 1 is injected into the plate heat exchanger 5 through the second circulating pump 4. The water pumping volume of the second circulating pump 4 is the same as the increase in the water volume of the waste heat power generation circulating water. After part of the circulating water in the water reservoir 1 enters the plate heat exchanger 5, this part of the circulating water absorbs heat and is discharged through the heating pipe 6 for heating the factory area; the circulating water pressure is further reduced by the filter pressure reducer 7, and the impurities in the circulating water are removed at the same time; the cold water make-up pump 18 is used to supply low-temperature water to the circulating water system to adjust the inlet water temperature of the cooling tower 2.

[0030] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

Claims

1. A waste heat power generation circulating water regulating device, comprising a water reservoir (1), a cooling tower (2) mounted on the water reservoir (1), and a first circulating pump (3) for supplying water to the cooling tower (2); characterized in that: The system further comprises a second circulation pump (4) and a plate heat exchanger (5), wherein the output end of the first circulation pump (3) is connected to an inlet end of the plate heat exchanger (5), and an outlet end of the plate heat exchanger (5) is connected to the water inlet end of the cooling tower (2); the input end of the second circulation pump (4) is connected to the interior of the water reservoir (1), the output end of the second circulation pump (4) is connected to the other inlet end of the plate heat exchanger (5), and a heat supply pipe (6) is provided at the other outlet end of the plate heat exchanger (5).

2. The waste heat power generation circulating water regulating device according to claim 1, characterized in that: It also includes a filter pressure reducer (7) installed at the outlet end of the first circulation pump (3) and the second circulation pump (4), the filter pressure reducer (7) including a four-way (8), a cylinder (9) arranged at the bottom of the four-way (8) and communicating with the interior of the four-way (8), and a pressure reducing filter installed in the cylinder (9) in an upward and downward sliding manner; The decompression filter element comprises an inner cylinder (10), a piston (11) fixedly mounted on the bottom of the inner cylinder (10) and fitting with the inner wall of the cylinder body (9) and the inner wall of the upper pipe of the four-way (8), a limiting ring (12) is provided on the inner wall of the upper pipe of the four-way (8); an opening (13) corresponding to the horizontal pipe on the four-way (8) and a filter portion (14) are provided on the inner cylinder (10).

3. The waste heat power generation circulating water regulating device according to claim 2, characterized in that: A spring (15) is installed at the bottom of the piston (11), one end of the spring (15) abuts against the piston (11), and the other end of the spring (15) abuts against the inner bottom wall of the cylinder (9).

4. The waste heat power generation circulating water regulating device according to claim 2, characterized in that: A blocking blind plate (16) is provided on the top of the inner cylinder (10), and the blocking blind plate (16) is detachably connected to the cross-joint (8) via bolts.

5. The waste heat power generation circulating water regulating device according to claim 4, characterized in that: A pull ring (17) is provided on the top of the blocking blind plate (16).

6. The waste heat power generation circulating water regulating device according to claim 1 or 5, characterized in that: It also includes a cold water make-up pump (18), the input end of the cold water make-up pump (18) being in communication with the water inlet end of the cooling tower (2).

7. The waste heat power generation circulating water regulating device according to claim 6, characterized in that: The first circulation pump (3), the second circulation pump (4), the plate heat exchanger (5) and the cold water feed pump (18) are each provided in two groups.

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