Heat exchanger with reduced impurity precipitation

Abstract

The utility model discloses a kind of heat exchangers reducing impurity precipitation, including heat exchanger body, pipe passage pipe orifice and shell pipe orifice, the liquid inlet end of the shell pipe orifice is equipped with filter by electromagnetic valve, the side wall of this filter is connected with liquid inlet pipe, and the top cover of filter is rotatably installed with liquid outlet pipe, the filter cartridge core is connected with the bottom end of liquid outlet pipe, the end of liquid outlet pipe that extends filter top cover is connected with elbow pipe by swivel joint, the inner wall of filter is symmetrically installed with scraping strip, and scraping strip is tightly attached with filter cartridge core outer wall, shell pipe orifice is also equipped with a branch pipe, and the branch pipe is connected with liquid storage cylinder by metering pump, and the liquid storage cylinder is used to store scale inhibitor. The utility model integrates two big function modules of dynamic rotary self-cleaning filter and intelligent chemical dosing cylinder, which is conducive to removing the solid particle core of scale formation from the source, while destroying the scale formation condition of dissolubility substance, significantly reducing the impurity precipitation and scale formation risk inside heat exchanger.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange equipment technology, and in particular to a heat exchanger that reduces impurity precipitation. Background Technology

[0002] As a key heat exchange device in the industrial field, the operating efficiency of heat exchangers directly affects the energy consumption and cost of the entire system. In practical applications, the cooling water flowing through heat exchangers often contains various solid particulate impurities and scale-forming ions. These impurities are deposited on the heat exchange surface, which is the main reason for scale formation and reduced efficiency of heat exchangers.

[0003] In existing technologies, static filters are usually installed at the inlet of heat exchangers to intercept solid impurities. However, during operation, the filter element surface is easily covered and clogged by impurities, resulting in a decrease in filtration efficiency. In addition, in order to inhibit the formation of chemical scale, scale inhibitors and other chemical agents are usually added to the system. However, traditional dosing methods have problems such as unreasonable dosing points and uneven mixing of agents and fluids, resulting in limited scale prevention effect and easy waste of agents.

[0004] Therefore, we propose a heat exchanger that reduces impurity precipitation to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a heat exchanger that reduces impurity precipitation, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A heat exchanger for reducing impurity precipitation includes a heat exchanger body, tube-side inlets, and shell inlets. A filter is installed at the liquid inlet of the shell inlet via a solenoid valve. An inlet pipe is connected to the side wall of the filter, and an outlet pipe is rotatably installed on the top cover of the filter. The bottom end of the outlet pipe is connected to a filter cartridge. One end of the outlet pipe extending out of the filter top cover is connected to a bend pipe via a rotary joint. A motor for driving the outlet pipe to rotate is also installed on the top cover of the filter. Scrapers are symmetrically installed on the inner wall of the filter, and the scrapers are in close contact with the outer wall of the filter cartridge. A branch pipe is also provided on the shell inlet, and a storage tank is connected to the branch pipe via a metering pump. This storage tank is used to store scale inhibitor.

[0008] In a further embodiment, the top cover of the filter is supported and connected to the bend by a plurality of circumferentially distributed support rods.

[0009] In a further embodiment, a conical ring is coaxially fixed to one end of the outlet pipe extending out of the filter top cover. A conical wheel is vertically meshed around the conical ring, and the conical wheel is connected to the output shaft of the motor.

[0010] In a further embodiment, the scraper is connected and fixed to the inner wall of the filter by a plurality of short rods evenly distributed along the length direction.

[0011] In a further embodiment, the bottom of the filter has a funnel-shaped structure, and a drain valve is installed at the bottom of the filter.

[0012] In a further embodiment, a check valve is installed on the branch pipe section.

[0013] In a further embodiment, a controller and an alarm are installed on the outer wall of the liquid storage tank, and a liquid level sensor is installed inside the liquid storage tank. Both the liquid level sensor and the alarm are electrically connected to the controller.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention integrates two major functional modules: a dynamic rotating self-cleaning filter and an intelligent chemical dosing cylinder. This forms a synergistic anti-scaling mechanism that combines physical interception and chemical inhibition. It helps to remove the core of scale-forming solid particles at the source, while also disrupting the scaling conditions of dissolved substances. This synergistic effect significantly reduces the risk of impurity precipitation and scaling inside the heat exchanger, thereby reducing maintenance costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the installation structure of the filter and liquid storage tank of this utility model;

[0018] Figure 3 This is a schematic diagram of the internal structure of the filter of this utility model.

[0019] In the diagram: 1. Heat exchanger body; 2. Tube side inlet; 3. Shell inlet; 4. Solenoid valve; 5. Filter; 6. Inlet pipe; 7. Outlet pipe; 8. Filter cartridge; 9. Rotary joint; 10. Bend; 11. Conical ring; 12. Conical wheel; 13. Motor; 14. Support rod; 15. Short rod; 16. Scraper; 17. Drain valve; 18. Branch pipe; 181. Check valve; 19. Liquid storage tank; 20. Metering pump; 21. Controller; 22. Liquid level sensor; 23. Alarm. Detailed Implementation

[0020] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-3 A heat exchanger for reducing impurity precipitation includes a heat exchanger body 1, on which a tube-side port 2 and a shell port 3 are provided. The tube-side port 2 is a hot water inlet / outlet interface, and the shell port 3 is a cooling water inlet / outlet interface. The liquid inlet end of the shell port 3 is connected to a filter 5 through a solenoid valve 4.

[0024] A liquid inlet pipe 6 is connected to the side wall of filter 5, through which the cooling water to be treated enters. A vertical liquid outlet pipe 7 is rotatably mounted on the top cover of filter 5 via a bearing. To ensure that the pressurized unfiltered fluid inside filter 5 does not leak from the gap between the top cover and the liquid outlet pipe 7 when the liquid outlet pipe 7 rotates, an O-ring seal is provided between the bearing and the top cover to form a static seal, preventing fluid leakage from the installation gap between the bearing and the top cover. The bearing itself is preferably a sealed bearing. A shaft skeleton oil seal is provided between the inner side of the bearing and the liquid outlet pipe 7 to form a dynamic seal. The bottom end of the liquid outlet pipe 7 extends into the interior of filter 5 and is connected to a cylindrical filter core 8. The top end of the liquid outlet pipe 7 extends out of the top cover of filter 5 and is connected to a bend pipe 10 via a rotary joint 9. The rotary joint 9 ensures that the fluid passage remains sealed when the liquid outlet pipe 7 rotates. The bend pipe 10 is connected to a solenoid valve 4.

[0025] To achieve the rotation of the filter cartridge 8, a conical ring 11 is coaxially fixed on the part of the liquid outlet pipe 7 that extends out of the top cover. A conical wheel 12 that meshes with the conical ring 11 is driven by a motor 13. The motor 13 is fixedly installed on the top cover of the filter 5. Through the vertical meshing transmission between the conical wheel 12 and the conical ring 11, the motor 13 can drive the liquid outlet pipe 7 and the filter cartridge 8 to rotate smoothly together.

[0026] To ensure the structural stability between the bend 10 and the top cover of the filter 5, the two are supported and connected by several circumferentially distributed support rods 14.

[0027] Inside the filter 5, at least a pair of symmetrically arranged scraper blades 16 are fixedly installed on its inner wall by a number of short rods 15 evenly distributed along the length direction. The inner edge of these scraper blades 16 is in close contact with the outer wall surface of the filter core 8. When the filter core 8 rotates, the filter residue attached to its outer surface is scraped off by the fixed scraper blades 16. The bottom of the filter 5 is designed as a funnel-shaped structure, and a drain valve 17 is installed at its lowest point to facilitate the collection and discharge of the scraped impurities.

[0028] In terms of chemical dosing, a branch pipe 18 is connected to the shell port 3. A check valve 181 and a metering pump 20 are installed on the branch pipe 18 in sequence. The inlet end of the metering pump 20 is connected to the liquid storage tank 19 through a pipe. The liquid storage tank 19 is used to store scale inhibitors and other chemical agents.

[0029] To further achieve intelligent management, a controller 21 and an alarm 23 are installed on the outer wall of the liquid storage tank 19. The controller 21 adopts a PLC or a single-chip microcomputer, and the alarm 23 adopts an audible and visual alarm. A liquid level sensor 22 is installed inside the liquid storage tank 19. Both the liquid level sensor 22 and the alarm 23 are electrically connected to the controller 21. When the liquid level sensor 22 detects that the liquid level of the agent is lower than the set value, it will send a signal to the controller 21. The controller 21 will then trigger the alarm 23 to sound an alarm, reminding the staff to add the agent in time, thereby avoiding the failure of the system's anti-scaling function due to insufficient agent. The liquid storage tank 19 is equipped with a liquid filling port that can be unscrewed.

[0030] Working process: The fluid to be treated enters the filter 5 through the inlet pipe 6. Under pressure, the fluid passes through the rotating filter element 8, where solid particles are trapped on the outer surface of the filter element. The clean fluid enters the interior of the filter element 8 and flows out through the outlet pipe 7, rotary joint 9, and bend 10, finally entering the heat exchanger body 1 through the shell port 3. During the filtration process, the motor 13 operates intermittently or continuously at low speed according to a set program. Through the meshing of the conical wheel 12 and the conical ring 11, it drives the outlet pipe 7 and the filter element 8 to rotate slowly. The stationary scraper 16 then scrapes off the filter residue adhering to the outer wall of the filter element 8. Impurities settle to the bottom of the funnel-shaped filter 5 under gravity. When impurities accumulate to a certain extent, the control system can periodically open the drain valve 17 to discharge the impurities from the system. This process can be carried out without stopping the system, ensuring the continuity of production. While the clean fluid flows to the heat exchanger, the metering pump 20 accurately pumps the scale inhibitor in the storage tank 19 into the branch pipe 18 according to the preset flow rate. After the scale inhibitor and the clean fluid are fully mixed at the downstream of the branch pipe 18 or at the shell pipe port 3, they enter the heat exchanger body 1 together. The scale inhibitor can effectively inhibit the crystallization and deposition of scale-forming ions in the fluid, playing a role in chemical scale prevention.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0032] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A heat exchanger for reducing impurity precipitation, comprising a heat exchanger body (1), tube-side inlets (2), and shell inlets (3), characterized in that: The inlet end of the housing port (3) is equipped with a filter (5) via a solenoid valve (4). The side wall of the filter (5) is connected to an inlet pipe (6), and an outlet pipe (7) is rotatably installed on the top cover of the filter (5). The bottom end of the outlet pipe (7) is connected to a filter core (8). One end of the outlet pipe (7) extending out of the top cover of the filter (5) is connected to a bend pipe (10) via a rotary joint (9). The top cover of the filter (5) is also equipped with a motor (13) that drives the outlet pipe (7) to rotate. Scrapers (16) are symmetrically installed on the inner wall of the filter (5), and the scrapers (16) are in close contact with the outer wall of the filter core (8). A branch pipe (18) is also provided on the housing port (3), and a storage tank (19) is connected to the branch pipe (18) via a metering pump (20). The storage tank (19) is used to store scale inhibitor.

2. A heat exchanger for reducing impurity precipitation according to claim 1, characterized in that: The top cover of the filter (5) is connected to the bend (10) by a number of circumferentially distributed support rods (14).

3. A heat exchanger for reducing impurity precipitation according to claim 1, characterized in that: The outlet pipe (7) extends out of the top cover of the filter (5) and is coaxially fixed with a conical ring (11). The conical ring (11) is vertically meshed with a conical wheel (12), and the conical wheel (12) is connected to the output shaft of the motor (13).

4. A heat exchanger for reducing impurity precipitation according to claim 1, characterized in that: The scraper (16) is connected and fixed to the inner wall of the filter (5) by a number of short rods (15) evenly distributed along the length direction.

5. A heat exchanger for reducing impurity precipitation according to claim 1, characterized in that: The bottom of the filter (5) adopts a funnel-shaped structure, and a drain valve (17) is installed at the bottom of the filter (5).

6. A heat exchanger for reducing impurity precipitation according to claim 1, characterized in that: A check valve (181) is installed on the section of the branch pipe (18).

7. A heat exchanger for reducing impurity precipitation according to claim 1, characterized in that: A controller (21) and an alarm (23) are installed on the outer wall of the liquid storage tank (19), and a liquid level sensor (22) is installed inside the liquid storage tank (19). Both the liquid level sensor (22) and the alarm (23) are electrically connected to the controller (21).

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