Efficient cross-flow cooling tower capable of being backwashed

Abstract

The utility model discloses an efficient cross-flow cooling tower capable of backwashing, which comprises a tower body, a coil pipe assembly detachably arranged in the tower body, a spraying assembly and an exhaust assembly for heat exchange of the coil pipe assembly, and a pulse cleaner for washing the coil pipe assembly, and a water inlet pipe orifice and a water outlet pipe orifice of the coil pipe assembly respectively penetrate out of the side wall of the tower body; the water inlet pipe orifice is provided with a first three-way valve which is respectively communicated with a blow-off pipeline and a cooling water inlet pipeline, the water outlet pipe orifice is provided with a second three-way valve which is respectively communicated with a water outlet of the pulse cleaner and a cooling water outlet pipeline, and a water inlet of the pulse cleaner is communicated with the cooling water outlet pipeline. By arranging the pulse cleaner, impurities such as incrustation in the coil pipe can be flushed after equipment operates for a long time, the bending radius of the spiral coil pipe is smooth, the terminal water pipe is connected with the coil pipe in a tangent mode, the impurities such as the incrustation are conveniently discharged, operation and maintenance are more convenient, and the service life of the coil pipe is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling towers, and more specifically, to a high-efficiency cross-flow cooling tower capable of backwashing. Background Art

[0002] The function of a cooling tower is to fully exchange heat between the high-temperature water or other cooling liquids in the circulation system and the spray system of the cooling tower through the internal coil of the cooling tower, and the cooling tower fan takes away the internal heat, thereby reducing the temperature of the liquid in the circulation system. In the circulation system, the cooling tower, as an important heat exchange device, ensures the normal operation of the system.

[0003] After the existing cooling tower equipment runs for a long time, the inner wall of the internal coil is severely scaled, resulting in low system energy efficiency. During operation and maintenance work, it is often necessary to disassemble the cooling tower, remove the internal coil, and wash it with a high-pressure water gun or other methods. For example, a closed cooling tower that is easy to clean disclosed in Chinese Utility Model Patent Publication No.: CN209445838U has a structure composed of a tower body, a return water pipe, and a spray water pump. The return water pipe connects the tower body and the spray water pump. A spray pipe is arranged at the upper position inside the tower body, and the spray pipe is connected to the return water pipe. A heat exchange pipe is arranged below the spray pipe. When cleaning the heat exchange pipe of this closed cooling tower that is easy to clean, the heat exchange pipe needs to be removed for cleaning, which increases the work intensity of the staff and reduces the cleaning efficiency. In daily operation and maintenance management, frequent disassembly will surely affect the stability of system operation and bury potential hazards. If a systematic cleaning is carried out only once in a long time, the scaling is severe and it is impossible to completely remove it. Over time, the performance of the cooling tower becomes lower and lower, and the failure frequency of the system becomes higher and higher. Eventually, only a new coil or equipment can be replaced. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a high-efficiency cross-flow cooling tower capable of backwashing, and overcome the above-mentioned defects in the prior art.

[0005] The technical solution for achieving the purpose of the utility model is: a high-efficiency cross-flow cooling tower capable of backwashing, including a tower body, a coil assembly detachably arranged in the tower body, a spray assembly and an exhaust assembly for heat exchange of the coil assembly, and a pulse cleaner for flushing the coil assembly. The water inlet and outlet of the coil assembly respectively penetrate through the side wall of the tower body. A first three-way valve is arranged at the water inlet and is respectively communicated with a sewage pipeline and a cooling water inlet pipeline. A second three-way valve is arranged at the water outlet and is respectively communicated with the water outlet of the pulse cleaner and a cooling water outlet pipeline. The water inlet of the pulse cleaner is connected to the cooling water outlet pipeline.

[0006] As a preferred embodiment, the coil assembly is a multi-layer nested spiral coil. The cooling water inlet pipe is connected to a plurality of water inlet ports of the coil assembly through a matching water distributor, and the cooling water outlet pipe is connected to a plurality of water outlet ports of the coil assembly through a matching water collector.

[0007] As a preferred embodiment, the spraying assembly includes a shower head disposed in the tower body for spraying water onto the coil assembly. The shower head is connected to a shower pump, and the water inlet end of the shower pump is connected to a water collection pool disposed at the bottom of the tower body.

[0008] As a preferred embodiment, the exhaust air assembly includes a fan blade and a fan blade motor fixed on the top of the tower body.

[0009] As a preferred embodiment, a water blocking and filling layer is further disposed between the fan blade and the shower head.

[0010] As a preferred embodiment, the exhaust air assembly further includes air inlet grilles disposed on both sides of the side wall of the tower body.

[0011] Adopting the above technical solutions, the utility model has the following beneficial effects:

[0012] (1) For the efficient cross-flow cooling tower capable of backwashing of the utility model, by arranging a pulse cleaner, after the equipment runs for a long time, scale and other impurities inside the coil can be flushed. The bending radius of the spiral coil is smooth, and the terminal water pipe is tangentially connected to the coil, facilitating the discharge of scale and other impurities, and making operation and maintenance more convenient, effectively improving the service life of the coil.

[0013] (2) When high-temperature circulating cooling water flows into the water inlet of the utility model, the water flow enters the corresponding branch pipes through the water distributor respectively. At this time, the three-way valve guides the water flow in the branch pipes into the multi-layer nested spiral coil. The water flow rises layer by layer through the multi-layer nested spiral coil and dissipates heat to become low-temperature cooling water. Finally, it flows out from each pipe orifice of the multi-layer nested spiral coil, passes through the three-way valve, flows into the water collector, and then flows out from the cooling water outlet.

[0014] (3) In the utility model, the coil of the multi-layer nested spiral coil is multi-layer spiral, and the pipe diameter, spiral layer number, inner and outer turns are specifically designed according to the heat exchange energy efficiency ratio, which can effectively improve the heat exchange efficiency. And if a single coil leaks or is blocked, it can be disassembled separately, facilitating repair and replacement, through the matching water distributor and water collector.

[0015] (4) When the cooling water circulates in the multi-layer nested spiral coil of the utility model, the spraying system sprays water mist. After sufficient heat exchange inside the cooling tower, it finally converges into the water collection pool at the bottommost part and realizes reciprocating circulation through the spraying water pump, which can effectively improve the heat exchange efficiency.

[0016] (5) The top - layer fan motor of the present utility model drives the fan blades to extract the high - temperature air inside the cooling tower, and the external air flows into the new air through the lower air intake grille.

[0017] (6) The present utility model is equipped with a water - blocking filling layer above the spray system. Its structure is conducive to the outflow of air, but can block water, avoiding the loss caused by the water vapor being carried away by the fan with the air. Description of the Drawings

[0018] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to specific embodiments and in combination with the drawings, where

[0019] Figure 1 is a structural diagram of a high - efficiency cross - flow cooling tower that can be back - flushed.

[0020] Figure 2 is a structural diagram of a multi - layer nested spiral coil pipe.

[0021] Figure 3 is a three - dimensional view of a water distributor.

[0022] Figure 4 is a three - dimensional view of a water collector and a pulse cleaner.

[0023] The reference numerals in the drawings are: 1, tower body; 2, coil assembly, 2 - 1, water inlet port, 2 - 2, water outlet port; 3, spray assembly, 3 - 1, shower head, 3 - 2, shower pump, 3 - 3, collecting pool; 4, exhaust assembly, 4 - 1, fan blade, 4 - 2, fan motor, 4 - 3, air intake grille; 5, first three - way valve; 6, sewage pipe; 7, cooling water inlet pipe; 8, pulse cleaner; 9, cooling water outlet pipe; 10, water distributor; 11, water collector; 12, water - blocking filling layer; 13, second three - way valve. Detailed Embodiments

[0024] In order to better understand the above - mentioned technical solutions, the following will detail the above - mentioned technical solutions in combination with the drawings in the specification and specific embodiments.

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in combination with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Accordingly, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0027] It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

[0028] In the description of the embodiments of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is customarily placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0029] In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. The present invention will be further described below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention.

[0030] (Embodiment)

[0031] See Figures 1 to 4 , a highly efficient cross-flow cooling tower with backwashing function, comprising a tower body 1, a coil assembly 2 detachably arranged in the tower body 1, a spray assembly 3 and an exhaust assembly 4 for heat exchange of the coil assembly 2, and a pulse cleaner 8 for flushing the coil assembly 2.

[0032] The coil assembly 2 is a four-layer nested spiral coil. The four water inlet ports 2-1 and four water outlet ports 2-2 of the coil assembly 2 penetrate through the side wall of the tower body 1 respectively. The four water inlet ports 2-1 are connected to the four branch pipes of the corresponding water distributor 10 and the sewage pipe 6 through the first three-way valve 5. The water inlet pipe of the water distributor 10 is connected to the cooling water inlet pipe 7. The four water outlet ports 2-2 are connected to the four branch pipes of the corresponding water collector 11 and the water outlet of the pulse cleaner 8 through the second three-way valve 13. The cooling water outlet pipe 9 is connected to the water outlet pipe of the water collector 11 and the water inlet of the pulse cleaner 8 respectively. Among them, the four-layer nested spiral coil can be disassembled separately, and the first three-way valve 5, the pulse cleaner 8, the water distributor 10 and the water collector 11 are all detachably fixedly connected. By setting the pulse cleaner, after the equipment runs for a long time, the scale and other impurities inside the coil can be flushed. The bending radius of the spiral coil is smooth, and the terminal water pipe is tangent to the coil, which is convenient for discharging scale and other impurities, and the operation and maintenance are more convenient. If a single coil in the nested coil leaks or is blocked, it can be disassembled separately for easy repair and replacement.

[0033] Further, the spray assembly 3 includes a shower head 3-1 arranged in the tower body 1 for spraying water onto the coil assembly 2. The shower head 3-1 is connected to the shower pump 3-2, and the water inlet end of the shower pump 3-2 is connected to the water collecting tank 3-3 arranged at the bottom of the tower body 1. When the cooling water circulates in the multi-layer nested spiral coil, the spray system sprays water mist. After sufficient heat exchange inside the cooling tower, it finally converges in the lowest water collecting tank and realizes reciprocating circulation through the spray pump, which can effectively improve the heat exchange efficiency.

[0034] Further, the exhaust assembly 4 includes a fan blade 4-1 and a fan motor 4-2 fixed on the top of the tower body 1, and air inlet grilles 4-3 arranged on both sides of the side wall of the tower body 1. A water retaining and filling layer 12 is also arranged between the fan blade 4-1 and the shower head 3-1. The fan motor at the topmost layer drives the fan blade to draw away the high temperature inside the cooling tower, and the external air flows in through the lower air inlet grille. A water retaining and filling layer is installed above the spray system. Its structure is conducive to the outflow of air, but can block the water, avoiding the loss caused by the water vapor being taken away by the fan with the air.

[0035] The working principle of the cooling and temperature reduction system of the cooling tower of the present utility model is as follows:

[0036] When the high-temperature circulating cooling water enters the water inlet, the water flow enters the corresponding branch pipes through the water distributor 10. At this time, the first three-way valve 5 guides the water flow in the branch pipes into the multi-layer nested spiral coil 2. The water flow rises layer by layer through the multi-layer nested spiral coil 2 and dissipates heat to become low-temperature cooling water. Finally, it flows out from each pipe orifice of the multi-layer nested spiral coil 2, passes through the second three-way valve 13, flows into the water collector 11, and then flows out from the cooling water outlet.

[0037] When the cooling water circulates in the multi-layer nested spiral coil 2, it exchanges heat with the water mist sprayed by the spraying assembly 3.

[0038] The fan motor of the uppermost layer of the exhaust air assembly 4 drives the fan blades to extract the high temperature inside the cooling tower, and the external air flows in through the lower air intake grille to bring in new air.

[0039] To prevent water vapor from being carried away by the fan with the air and causing losses, a water retaining and filling layer 12 is installed above the spraying assembly 3, and its structure is conducive to the outflow of air but can block water.

[0040] The spraying assembly 3 sprays water mist, and after sufficient heat exchange inside the cooling tower, it finally converges in the lowest collecting pool 3-3 and realizes reciprocating circulation through the spraying water pump 3-2.

[0041] The working principle of the backwashing system of the cooling tower of the present utility model:

[0042] The circulating water system performs backwashing, and the cooling water outlet returns. By adjusting the settings of the first and second three-way valves, at this time, the water in the water distributor 10 cannot enter the multi-layer nested spiral coil 2, and the water flow can only enter the multi-layer nested spiral coil 2 through the pulse cleaner 8 respectively.

[0043] The pulse cleaner 8 controls the water flow, adjusts the water inlet pressure of each pipeline, scours the scale and other impurities on the inner wall of the multi-layer nested spiral coil 2, and the flushed dirt is discharged through the backwashing sewage outlet, so as to achieve the purpose of improving the heat exchange efficiency. The bending radius of the spiral coil is smooth, and the terminal water pipe is connected tangentially to the coil, which is convenient for discharging scale and other impurities, and the operation and maintenance are more convenient.

[0044] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the present utility model. It should be understood that the above are only specific embodiments of the present utility model and are not used to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A high-efficiency cross-flow cooling tower capable of backwashing, characterized in that: The invention comprises a tower body (1), a coil assembly (2) detachably arranged in the tower body (1), a spray assembly (3) and an exhaust assembly (4) for heat exchange of the coil assembly (2), and a pulse cleaner (8) for flushing the coil assembly (2); the water inlet (2-1) and the water outlet (2-2) of the coil assembly (2) respectively pass through the side wall of the tower body (1); the water inlet (2-1) is provided with a first three-way valve (5) which is respectively connected to a sewage pipe (6) and a cooling water inlet pipe (7); the water outlet (2-2) is provided with a second three-way valve (13) which is respectively connected to the water outlet of the pulse cleaner (8) and the cooling water outlet pipe (9); the water inlet of the pulse cleaner (8) is connected to the cooling water outlet pipe (9).

2. A high-efficiency cross-flow cooling tower capable of backwashing according to claim 1, characterized in that: The coil assembly (2) is a multi-layer nested spiral coil; the cooling water inlet pipe (7) is connected to the multiple water inlet pipe openings (2-1) of the coil assembly (2) via a matching water distributor (10); the cooling water outlet pipe (9) is connected to the multiple water outlet pipe openings (2-2) of the coil assembly (2) via a matching water collector (11).

3. A high-efficiency cross-flow cooling tower capable of backwashing according to claim 1, characterized in that: The spray assembly (3) comprises a water spray head (3-1) arranged in the tower body (1) for spraying water onto the coil assembly (2); the water spray head (3-1) is connected to a water spray pump (3-2); and the water inlet end of the water spray pump (3-2) is connected to a water collection tank (3-3) arranged at the bottom of the tower body (1).

4. A high-efficiency cross-flow cooling tower capable of backwashing according to claim 1, characterized in that: The exhaust assembly (4) comprises a fan blade (4-1) fixed to the top of the tower body (1) and a fan blade motor (4-2).

5. A high-efficiency cross-flow cooling tower capable of backwashing according to claim 4, characterized in that: A water-blocking filling layer (12) is also provided between the fan blade (4-1) and the water shower head (3-1).

6. A high-efficiency cross-flow cooling tower capable of backwashing according to claim 4, characterized in that: The exhaust assembly (4) also includes air intake grilles (4-3) arranged on both sides of the side walls of the tower body (1).

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