An exchange tank

Abstract

The utility model provides a kind of exchange tank, including tank body, the tank body top is equipped with import, bottom is equipped with liquid outlet, the vertical setting stirring shaft and several heat exchange pipes in tank body, wherein the stirring shaft is arranged at the center of tank body, stirring shaft is equipped with stirring vane, several the heat exchange pipe is arranged around stirring shaft;The lower end port of heat exchange pipe is import, through water inlet pipe to extend tank body outside and connect cold water source, the upper end port of heat exchange pipe is outlet, through water outlet pipe to extend tank body, the heat exchange pipe movable sleeve installs scraper ring.The utility model structure is simple, convenient to operate: heat exchange pipe is sleeved scraper ring, when needing heat exchange pipe surface to attach impurity to clean, agitate cleaning fluid, push cleaning fluid to rise, and then push scraper ring to move up, and scraper ring is cleaned to the impurity attached to the surface of heat exchange pipe, guarantees the heat exchange efficiency of heat exchange pipe.

Description

Technical Field

[0001] This utility model belongs to the field of tank cleaning technology, and in particular relates to an exchange tank. Background Technology

[0002] Some industrial production processes generate a large amount of waste heat. For example, industrial ovens, thermal power plants, medical high-temperature sterilization, and food processing industries produce a lot of flue gas and steam. In order to save energy, this waste heat is usually recovered and reintroduced into the heat circulation system of the production process or transferred to the municipal heating system.

[0003] Currently, heat exchange tanks are commonly used for industrial waste heat recovery. These tanks are equipped with heat exchange tubes. Cold water enters through the bottom opening of the heat exchange tubes, while high-temperature flue gas and steam enter the tank through the top inlet and exchange heat with the heat exchange tubes. This causes the temperature of the cold water inside the heat exchange tubes to rise, forming high-temperature water, which is then led out of the tank through the top opening of the heat exchange tubes and enters the production heat circulation system or is transferred to the municipal heating system. Meanwhile, the temperature of the high-temperature flue gas and steam decreases after heat exchange, forming condensate, which is discharged through the liquid outlet at the bottom of the tank.

[0004] Because the flue gas and water vapor generated in industrial production contain a large number of impurities, these impurities will adhere to the surface of the heat exchange tubes during the heat exchange process in the tank, affecting the heat exchange efficiency. In order to ensure the heat exchange efficiency of the heat exchange tank, the surface of the heat exchange tubes must be cleaned regularly. At present, the heat exchange tubes are basically cleaned by vibration rinsing. However, due to the certain adhesiveness of impurities, the rinsing method is not ideal for cleaning the surface of the heat exchange tubes. Utility Model Content

[0005] In view of this, the present invention aims to provide an heat exchange tank to improve the cleaning effect on the surface of the heat exchange tube and ensure the heat exchange efficiency of the heat exchange tank.

[0006] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0007] An heat exchange tank includes a tank body, an inlet at the top of the tank body and an outlet at the bottom, a stirring shaft and several heat exchange tubes are vertically arranged inside the tank body, wherein the stirring shaft is arranged at the center of the tank body, the stirring shaft is provided with stirring blades, and the several heat exchange tubes are arranged around the stirring shaft.

[0008] The lower end of the heat exchange tube is the inlet, which extends out of the tank through the inlet pipe and connects to a cold water source. The upper end of the heat exchange tube is the outlet, which extends out of the tank through the outlet pipe. The heat exchange tube is fitted with a scraper ring.

[0009] Furthermore, the scraper ring is a steel wire ring.

[0010] Furthermore, the heat exchange tube is provided with several limiting members from top to bottom to divide the heat exchange tube into several segments, and each segment is fitted with at least one scraper ring.

[0011] Furthermore, the upper and lower end faces of the limiting member are facing conical structures.

[0012] Furthermore, both the inlet and outlet pipes are water distribution ring pipe structures, and both the inlet and outlet pipes are fixedly connected to the tank body.

[0013] Furthermore, the stirring blades are propulsion blades.

[0014] Furthermore, the bottom of the tank has a conical structure.

[0015] Furthermore, a fixing lug is provided on the upper part of the outer wall of the tank.

[0016] Compared with the prior art, the exchange tank of this utility model has the following advantages:

[0017] (1) The present invention has a simple structure and is easy to operate: a scraper ring is fitted on the heat exchange tube. When it is necessary to clean the impurities attached to the surface of the heat exchange tube, the cleaning liquid is stirred and pushed to rise, thereby pushing the scraper ring to move upward. The scraper ring cleans and scrapes off the impurities attached to the surface of the heat exchange tube, ensuring the heat exchange efficiency of the heat exchange tube.

[0018] (2) In this utility model, the heat exchange tube is divided into several segments by the limiting member, and a scraper ring is fitted on each segment to ensure that the scraper ring can completely clean the heat exchange tube of this segment, thereby ensuring the cleaning effect of the entire heat exchange tube. Attached Figure Description

[0019] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0020] Figure 1 This is a schematic diagram of an exchange tank according to an embodiment of the present utility model;

[0021] Figure 2 This is a front view of the heat exchange tube arrangement in an embodiment of this utility model;

[0022] Figure 3 This is a top view of the heat exchange tube arrangement in an embodiment of this utility model;

[0023] Figure 4 This is a schematic diagram of the upper limit plate structure of the heat exchange tube in this embodiment.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1-Tank body; 101-Inlet; 102-Outlet; 2-Agitator shaft; 21-Agitator blade; 22-Motor; 3-Fixing lug; 4-Fixing rod; 5-Outlet pipe; 6-Scraper ring; 7-Limiting plate; 71-Conical surface structure; 8-Heat exchange pipe; 9-Inlet pipe. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] like Figure 1 , Figure 2 and Figure 3 As shown, an heat exchange tank includes a tank body 1. A fixing lug 3 is provided on the upper part of the outer wall of the tank body 1 for fixing to a frame. An inlet 101 is provided at the top of the tank body 1, and an outlet 102 is provided at the bottom. The bottom of the tank body 1 has a conical structure. During heat exchange, high-temperature flue gas or steam from industrial production is introduced into the tank body 1 through the inlet 101 and exchanges heat with cold water in the heat exchange tubes inside the tank body 1. When it is necessary to clean the surface of the heat exchange tubes, cleaning water can be introduced into the tank body 1 through the inlet 101 to clean the heat exchange tubes. Preferably, a two-inlet, one-outlet three-way valve (not shown in the attached figure) is provided at the inlet 101. The inlet 101 is connected to the outlet of the two-inlet, one-outlet three-way valve. One inlet of the two-inlet, one-outlet three-way valve is connected to the cleaning water source, and the other inlet is connected to the high-temperature steam source or flue gas generated in production. The connection mode between the two inlets of the three-way valve and the inlet 101 of the tank body can be switched as needed to introduce an appropriate medium fluid into the tank body.

[0028] The tank 1 contains a stirring shaft 2 and heat exchange pipes 8. The stirring shaft 2 is located at the center of the tank 1. A motor 22 is installed on the top surface of the tank 1, driving the stirring shaft 2 to rotate. The stirring shaft 2 is equipped with stirring blades 21, preferably propeller-type blades. The stirring shaft stirs the cleaning water introduced into the tank, pushing the cleaning water upward and forming an upward vortex. The heat exchange pipes 8 are vertical pipe structures, with several evenly arranged around the stirring shaft 2. A water inlet pipe 9 is located near the bottom of the tank 1, and a water outlet pipe 5 is located near the top of the tank 1. Both the water inlet pipe 9 and the water outlet pipe 5 are water distribution ring pipe structures, with one end open and the other closed. The opening of the water inlet pipe 9 is the water inlet, extending out of the tank 1 to connect to a high-pressure cold water source. The opening of the water outlet pipe 5 is the water outlet, extending out of the tank 1 to connect to a production heat circulation system or a municipal heating system. It should be noted that the inlet pipe 9 is fixed at the bottom of the tank, and the outlet pipe 5 is connected and fixed to the side wall of the tank body 1 by the fixing rod 4. The lower end of the heat exchange pipe 8 is connected to the inlet pipe 9, and the upper end is connected to the outlet pipe 5. High-pressure cold water is introduced into the heat exchange pipe 8 through the inlet pipe 9. After heat exchange with the high-temperature steam or flue gas introduced into the tank, high-temperature water is formed and led out of the tank body 1 through the outlet pipe 5, and output to the production heat circulation system or transferred to the municipal heating system.

[0029] Each heat exchange tube 8 is divided into several segments by several limiting members 7 from top to bottom. Each segment is fitted with at least one scraper ring 6, which is a steel wire ring. In this structure, when the stirring shaft agitates the cleaning water introduced into the tank, creating a vortex, the water level gradually rises from the center outwards. Driven by the water, the scraper ring 6 moves upwards along the heat exchange tube 8, scraping away and cleaning the impurities adhering to its surface. Once the stirring shaft stops rotating, the water level in the tank drops back to a flat surface, and the scraper ring 6 falls back to the corresponding limiting member 7 under its own gravity. Therefore, this operation can be repeated, allowing the scraper ring 6 to move up and down repeatedly, cleaning the surface of the corresponding segment of the heat exchange tube 8 repeatedly, thus improving the scraping effect. Dividing the heat exchange tube 8 into several segments, each equipped with a scraper ring 6, improves the efficiency of the scraper ring 6 and enhances the cleaning efficiency and effect of the heat exchange tube 8 surface.

[0030] In this utility model, the upper and lower end faces of the limiting member 7 are facing conical surface structures 71, such as... Figure 4 As shown, the upper conical surface structure 71 has its opening facing downwards, and the lower conical surface structure 71 has its opening facing upwards. The upper surface of the limiting member 7 is set as a conical surface structure to ensure that the impurities removed from the heat exchange tube 8 fall smoothly from the limiting member 7. The lower surface of the limiting member 7 is set as a conical surface structure to prevent the cleaning water from forming a vortex at this point and affecting its upward movement. In other words, it ensures that the cleaning water during stirring can push the scraper ring 6 upwards to perform the scraping operation.

[0031] This invention has a simple structure. It utilizes the upward thrust of the cleaning water during stirring to move the scraper ring upward, thereby scraping the surface of the heat exchange tube and ensuring its cleanliness, ultimately guaranteeing the heat exchange efficiency of the heat exchange tank.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An exchange tank, characterized in that: The tank includes a tank body (1), which has an inlet (101) at the top and an outlet (102) at the bottom. A stirring shaft (2) and several heat exchange tubes (8) are vertically arranged inside the tank body (1). The stirring shaft (2) is located at the center of the tank body (1), and stirring blades (21) are provided on the stirring shaft (2). Several heat exchange tubes (8) are arranged around the stirring shaft (2). The lower end of the heat exchange tube (8) is the inlet, which extends out of the tank body through the water inlet pipe (9) and is connected to a cold water source. The upper end of the heat exchange tube (8) is the outlet, which extends out of the tank body (1) through the water outlet pipe (5). The heat exchange tube (8) is fitted with a scraper ring (6).

2. An exchange tank according to claim 1, characterized in that: The scraper ring (6) is a steel wire ring.

3. An exchange tank according to claim 1, characterized in that: The heat exchange tube (8) is provided with several limiting members (7) from top to bottom, dividing the heat exchange tube (8) into several segments, and each segment is fitted with at least one scraper ring (6).

4. An exchange tank according to claim 3, characterized in that: The upper and lower end faces of the limiting member (7) are facing conical structures (71).

5. An exchange tank according to claim 1, characterized in that: The inlet pipe (9) and outlet pipe (5) are both water distribution ring pipe structures, and the inlet pipe (9) and outlet pipe (5) are both connected and fixed to the tank body (1).

6. An exchange tank according to claim 1, characterized in that: The stirring blade (21) is a propulsion blade.

7. An exchange tank according to claim 1, characterized in that: The bottom of the tank (1) has a conical structure.

8. An exchange tank according to claim 1, characterized in that: The upper part of the outer wall of the tank (1) is provided with a fixing lug (3).

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