Multi-stage cooling tower for powder production line

Abstract

A multi-stage cooling tower used on a powder production line comprises a first-stage cooling tower and a second-stage cooling tower, the top of the first-stage cooling tower and the top of the second-stage cooling tower are each provided with a fan and a water retaining device located below the fan, and the upper portion of the first-stage cooling tower and the upper portion of the second-stage cooling tower are further provided with a cooling water inlet pipe and a spraying water pipe connected with the cooling water inlet pipe. A heat exchange coil pipe is arranged below the spraying water pipe; the heat exchange coil pipe set comprises a plurality of heat exchange pipe sets arranged from top to bottom, and each heat exchange pipe set is composed of an upper heat exchange coil pipe and a lower heat exchange coil pipe which are arranged in a staggered mode. The multi-stage cooling device has the advantages that multi-stage cooling is achieved, high-temperature cooling return water is gradually cooled, and the high-temperature return water is rapidly cooled. The cooling efficiency is high, the cooling water temperature consistency is good, and the accuracy of the reaction temperature can be guaranteed in powder production.

Description

Technical Field

[0001] The utility model relates to the technical field of steam heat energy recovery, in particular to a multi-stage cooling tower used in a powder production line. Background Art

[0002] In the pharmaceutical industry, cooling water is often needed for temperature control of powder production, but conventional single cooling towers cannot cool the cooling water down enough, making it difficult to obtain cooling return water with a low temperature and good consistency. It is difficult for a single cooling tower to quickly cool high-temperature cooling return water to room temperature, especially when the return water temperature is above 60 degrees. Utility Model Content

[0003] The purpose of the utility model is to provide a multi-stage cooling tower for a powder production line in view of the above-mentioned shortcomings.

[0004] The utility model comprises a primary cooling tower and a secondary cooling tower. The tops of the primary cooling tower and the secondary cooling tower are both provided with fans and water retainers located below them. The upper parts of the primary cooling tower and the secondary cooling tower are also provided with cooling water inlet pipes and spray water pipes connected thereto. A heat exchange coil is provided below the spray water pipes.

[0005] The heat exchange coil comprises a plurality of groups of heat exchange tubes arranged from top to bottom, each group of heat exchange tubes is composed of an upper heat exchange coil and a lower heat exchange coil arranged staggered with each other, a vertical tube a connected to the middle of the lower heat exchange coil is provided in the middle of the upper heat exchange coil, and a vertical tube b connected to another upper heat exchange coil below it is provided at the tail end of the lower heat exchange coil; the upper heat exchange coil of the topmost group of heat exchange tubes is connected to the hot water inlet pipe, and the lower heat exchange coil of the bottommost group of heat exchange tubes is connected to the hot water outlet pipe; an air inlet grille is provided on the tower wall below the heat exchange coil, a water trough is provided at the bottom of the primary cooling tower and the secondary cooling tower and below the air inlet grille, and a cooling water outlet pipe is provided at the bottom of the water trough;

[0006] The hot water outlet pipe of the primary cooling tower is connected to the hot water inlet pipe of the secondary cooling tower through the delivery pipe a, and the cooling water outlet pipe of the primary cooling tower is connected to the top of the cooling water replenishment tank through the delivery pipe b; a cooling water replenishment pipe is provided on the top of the cooling water replenishment tank, and an agitator is also provided in the cooling water replenishment tank, and the bottom outlet pipe of the cooling water replenishment tank is connected to the cooling water inlet pipe of the secondary cooling tower.

[0007] Preferably, a water pump a and a backup water pump b are arranged in parallel on the delivery pipeline a.

[0008] Preferably, a water pump c and a backup water pump d are arranged in parallel on the delivery pipeline b.

[0009] Preferably, the upper heat exchange coil and the lower heat exchange coil are both mosquito coils.

[0010] Preferably, the number of the multiple groups of heat exchange tubes is at least three.

[0011] Preferably, the spray water pipe is provided with a plurality of groups of high-pressure nozzles.

[0012] The utility model has the advantages of multi-stage cooling, gradually cooling the high-temperature cooling return water, and quickly cooling the high-temperature return water. The cooling efficiency is high and the cooling water temperature is consistent. It can ensure the accuracy of the reaction temperature when used in the production of powders. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model.

[0014] Figure 2 Schematic diagram of the connection between the upper heat exchange coil and the lower heat exchange coil. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0016] Therefore, the following detailed description of the embodiments of the utility model provided in the accompanying drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0017] In the description of the embodiments of the present utility model, it should be noted that if the terms "upper", "lower", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use. It is only for the convenience of describing the utility model 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 therefore cannot be understood as a limitation on the present utility model. In addition, if the terms "first", "second", etc. appear in the description of the present utility model, they are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0018] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set" and "connection" 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 a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0019] As shown in the accompanying drawings, the utility model comprises a primary cooling tower 1 and a secondary cooling tower 3, the tops of the primary cooling tower 1 and the secondary cooling tower 3 are both provided with a fan 11 and a water retainer 12 located below them, the upper parts of the primary cooling tower 1 and the secondary cooling tower 3 are also provided with a cooling water inlet pipe 14 and a spray water pipe 15 connected thereto, and a heat exchange coil 16 is provided below the spray water pipe 15;

[0020] The heat exchange coil 16 includes a plurality of groups of heat exchange tubes arranged from top to bottom, each group of heat exchange tubes is composed of an upper heat exchange coil 17 and a lower heat exchange coil 18 which are arranged in a staggered manner. A vertical tube a19 connected to the middle of the lower heat exchange coil 18 is provided in the middle of the upper heat exchange coil 17, and a vertical tube b20 connected to another upper heat exchange coil 17 below is provided at the tail end of the lower heat exchange coil 18; the upper heat exchange coil 17 of the uppermost group of heat exchange tubes is connected to a hot water inlet pipe 21, and the lower heat exchange coil 18 of the lowermost group of heat exchange tubes is connected to a hot water outlet pipe 22; an air inlet grille 23 is provided on the tower wall below the heat exchange coil 16, a water trough 24 is provided at the bottom of the primary cooling tower 1 and the secondary cooling tower 3 and below the air inlet grille 23, and a cooling water outlet pipe 25 is provided at the bottom of the water trough 24;

[0021] The hot water outlet pipe 22 of the primary cooling tower 1 is connected to the hot water inlet pipe 21 of the secondary cooling tower 3 through the delivery pipe a, and the cooling water outlet pipe 25 of the primary cooling tower 1 is connected to the top of the cooling water replenishment tank 2 through the delivery pipe b; a cooling water replenishment pipe 26 is provided on the top of the cooling water replenishment tank 2, and an agitator 27 is also provided in the cooling water replenishment tank 2, and the bottom outlet pipe of the cooling water replenishment tank 2 is connected to the cooling water inlet pipe 14 of the secondary cooling tower 3.

[0022] In another technical solution, a water pump a30 and a backup water pump b31 are arranged in parallel on the delivery pipeline a, so that when a single water pump fails, the use is not affected.

[0023] In another technical solution, a water pump c32 and a backup water pump d33 are arranged in parallel on the delivery pipeline b, so that when a single water pump fails, the use is not affected.

[0024] In another technical solution, the upper heat exchange coil 17 and the lower heat exchange coil 18 are both mosquito coils.

[0025] In another technical solution, the number of the multiple groups of heat exchange tubes is at least three to ensure the heat exchange effect.

[0026] In another technical solution, the spray water pipe 15 is provided with a plurality of groups of high-pressure nozzles.

[0027] Working method: high-temperature water enters the interior through the hot water inlet pipe of the primary cooling tower, and then cools the hot water through the spray water pipe and the heat exchange coil. The fan also sucks air from the air inlet grille and then discharges it. The water after primary cooling is connected to the hot water inlet pipe of the secondary cooling tower through the hot water outlet pipe through the conveying pipeline. The cooling water outlet pipe of the primary cooling tower is connected to the replenishing cooling water tank through the conveying pipeline b. The top of the replenishing cooling water tank is added with cold water through the cold water replenishing pipe for cooling. At the same time, it is mixed by the agitator of the replenishing cooling water tank. The bottom outlet pipe of the replenishing cooling water tank is connected to the cooling water inlet pipe of the secondary cooling tower, and then the water after primary cooling is cooled through the spray water pipe and the heat exchange coil. Finally, the water that has been cooled again is discharged from the hot water outlet pipe of the secondary cooling tower.

[0028] The above implementation cases are only for illustrating the technical solutions and features of the utility model, and their purpose is to enable people familiar with the technology to implement them better. They cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model are within the protection scope of the utility model, and those not described in detail are prior art.

Claims

1. A multi-stage cooling tower for a powder production line, comprising a primary cooling tower (1) and a secondary cooling tower (3), wherein the top of the primary cooling tower (1) and the secondary cooling tower (3) are both provided with a fan (11) and a water retainer (12) located below the fan, the upper part of the primary cooling tower (1) and the secondary cooling tower (3) are also provided with a cooling water inlet pipe (14) and a spray water pipe (15) connected thereto, and a heat exchange coil (16) is provided below the spray water pipe (15), characterized in that: The heat exchange coil (16) comprises a plurality of groups of heat exchange tubes arranged from top to bottom, each group of heat exchange tubes comprises an upper heat exchange coil (17) and a lower heat exchange coil (18) arranged in a staggered manner, a vertical tube a (19) connected to the middle of the lower heat exchange coil (18) is provided at the middle of the upper heat exchange coil (17), and a vertical tube b (20) connected to another upper heat exchange coil (17) below the lower heat exchange coil (18) is provided at the tail end of the lower heat exchange coil (18); the uppermost group of heat exchange tubes comprises an upper heat exchange coil (17) and a lower heat exchange coil (18) connected to the lower heat exchange coil (18) at the tail end. The upper heat exchange coil (17) of the tube is connected to the hot water inlet pipe (21), and the lower heat exchange coil (18) of the bottom group of heat exchange tubes is connected to the hot water outlet pipe (22); an air inlet grille (23) is provided on the tower wall below the heat exchange coil (16), and a water storage tank (24) is provided at the bottom of the first-stage cooling tower (1) and the second-stage cooling tower (3) and below the air inlet grille (23), and a cooling water outlet pipe (25) is provided at the bottom of the water storage tank (24); The hot water outlet pipe (22) of the primary cooling tower (1) is connected to the hot water inlet pipe (21) of the secondary cooling tower (3) through a delivery pipe a, and the cooling water outlet pipe (25) of the primary cooling tower (1) is connected to the top of the supplementary cooling water tank (2) through a delivery pipe b; a cooling water replenishment pipe (26) is provided at the top of the supplementary cooling water tank (2), and an agitator (27) is also provided in the supplementary cooling water tank (2); the bottom outlet pipe of the supplementary cooling water tank (2) is connected to the cooling water inlet pipe (14) of the secondary cooling tower (3).

2. A multi-stage cooling tower for a powder production line according to claim 1, characterized in that: The delivery pipeline a is provided with a water pump a (30) and a standby water pump b (31) in parallel.

3. A multi-stage cooling tower for a powder production line according to claim 1, characterized in that: The delivery pipeline b is provided with a water pump c (32) and a standby water pump d (33) in parallel.

4. A multi-stage cooling tower for a powder production line according to claim 1, characterized in that: The upper heat exchange coil (17) and the lower heat exchange coil (18) are both mosquito coil type coils.

5. The multi-stage cooling tower for a powder production line according to claim 1, characterized in that: The number of the multiple groups of heat exchange tubes is at least three.

6. The multi-stage cooling tower for a powder production line according to claim 1, characterized in that: The spray water pipe (15) is provided with a plurality of groups of high-pressure spray nozzles.

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