Cleaning device for polyester heat exchanger

Abstract

The utility model relates to the technical field of chemical fiber equipment and process, in particular to a polyester heat exchanger cleaning device which comprises a stainless steel water storage tank, an observation hole is formed in the front end of the top of the stainless steel water storage tank, and a display area is installed at the rear end of the top of the stainless steel water storage tank. The polyester heat exchanger cleaning device comprises a stainless steel water storage tank, a water supplementing metal hose is fixedly connected to the top end of the front face of the stainless steel water storage tank, an automatic water supplementing valve is fixedly installed on the water supplementing metal hose, and a thermometer and a PH monitor are fixedly installed on the front face of the stainless steel water storage tank and located below the water supplementing metal hose. Through the design, the polyester heat exchanger can be continuously dissolved and circularly washed, a good cleaning effect can be achieved, energy consumption in the daily production process of the polyester heat exchanger is obviously reduced, meanwhile, various self-protection safety interlocking is achieved, a circulating pump is prevented from being damaged, and operation and maintenance are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical fiber equipment and process, and in particular to a cleaning device for a polyester heat exchanger. Background Art

[0002] As a complex chemical fiber production device, the DuPont three-kettle process polyester unit uses a wide variety of equipment. Among them, coolers, heaters and other heat exchangers are used in large quantities as energy-saving equipment. The use of heat exchangers effectively reduces production energy consumption, but heat exchangers will inevitably have problems such as scaling or material accumulation during long-term use, resulting in a decrease in heat exchange efficiency and increased energy consumption. Therefore, operators will regularly disassemble and clean them during daily production to improve their heat exchange efficiency. Some heat exchangers, such as plate heat exchangers, can be directly disassembled and cleaned, but shell-and-tube heat exchangers, brazed heat exchangers, etc. are inconvenient or even impossible to disassemble and clean.

[0003] After research and analysis, it was found that the reason for the decrease in heat exchanger efficiency is that impurities, silt and scale are attached to the equipment on the water side, and PTA (purified terephthalic acid, reaction raw material) or a mixture of PTA and ester (ethylene glycol terephthalate, reaction intermediate) is attached to the equipment on the material side, affecting its heat exchange. The scale on the water side is cleaned with an acidic solution, and the scale dissolves quickly and the cleaning effect is obvious. The PTA or the mixture of PTA and ester attached to the material side is weakly acidic, and is cleaned with an alkaline solution, which also dissolves quickly and has an obvious cleaning effect. However, there is currently no corresponding cleaning device that can achieve convenient and efficient cleaning of polyester heat exchangers.

[0004] Therefore, it is particularly important to design a cleaning device for polyester heat exchanger to solve the above defects. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model designs a cleaning device for a polyester heat exchanger, which aims to solve the technical problem that there is no corresponding cleaning device in the prior art that can realize convenient and efficient cleaning of the polyester heat exchanger.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A cleaning device for a polyester heat exchanger comprises a stainless steel water storage tank, wherein an observation hole is provided at the front end of the top of the stainless steel water storage tank, a display area is installed at the rear end of the top of the stainless steel water storage tank, a water supply metal hose is fixedly connected to the top of the front of the stainless steel water storage tank, an automatic water supply valve is fixedly installed on the water supply metal hose, a thermometer and a PH monitor are fixedly installed on the front of the stainless steel water storage tank and below the water supply metal hose, a flap level gauge is fixedly installed on the left side of the stainless steel water storage tank, a metal reflux hose and an outlet metal hose are fixedly installed on the upper and lower ends of the back of the stainless steel water storage tank, and the front end of the metal reflux hose extends to the bottom end inside the stainless steel water storage tank, an outlet flow meter is fixedly installed at the front end of the outlet metal hose, a circulating pump is fixedly installed at the front end of the outlet flow meter, and a filter is fixedly installed between the circulating pump and the stainless steel water storage tank.

[0008] As a preferred solution of the utility model, a push handle is fixedly installed on the top of the front of the stainless steel water storage tank, the four corners of the bottom of the stainless steel water storage tank are rotatably connected to moving wheels, and the four corners of the bottom of the stainless steel water storage tank and the outer sides of the moving wheels are threadedly connected to support feet.

[0009] As a preferred solution of the utility model, a stainless steel cover is rotatably connected to the outer side of the observation hole, a handle is fixedly connected to the front end of the top of the stainless steel cover, and a transparent glass window is fixedly installed at the rear end of the top of the stainless steel cover.

[0010] As a preferred solution of the utility model, the display area includes a temperature display, a PH display, a liquid level display and a flow display, and the temperature display, PH display, liquid level display and flow display are electrically connected to the thermometer, PH monitor, flap liquid level meter and outlet flow meter respectively.

[0011] As a preferred solution of the utility model, an outlet main valve is fixedly installed between the outlet flow meter and the circulation pump, and a pump inlet valve is fixedly installed between the filter and the stainless steel water storage tank.

[0012] As a preferred solution of the utility model, the filter includes a connecting cover fixedly installed between the circulation pump and the pump inlet valve, the front and rear ends of the connecting cover are respectively provided with a water inlet and a water outlet, the bottom of the connecting cover is threadedly connected to a casing, a filter element is movably installed inside the casing, a waste discharge channel is opened at the bottom end of the casing, and the bottom of the casing is threadedly connected to a waste discharge head.

[0013] As a preferred solution of the utility model, a connecting frame is fixedly installed on the top of the filter element, an impeller is rotatably connected to the bottom of the connecting frame, and a cleaning brush is fixedly connected to the bottom of the impeller.

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

[0015] The utility model is designed to continuously dissolve and circulate the polyester heat exchanger, which can achieve a good cleaning effect, thereby significantly reducing the energy consumption of the polyester heat exchanger in the daily production process. At the same time, it has a variety of self-protection safety interlocks to avoid damage to the circulation pump, and is easy to operate and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the filter of the utility model;

[0018] Figure 3 This is a schematic diagram of the filter element structure of the utility model;

[0019] Figure 4 It is a schematic diagram of the internal structure of the filter element of the utility model.

[0020] In the figure: 1. Stainless steel water storage tank; 101. Push handle; 102. Moving wheel; 103. Support foot; 2. Observation hole; 201. Stainless steel cover; 202. Handle; 203. Transparent glass window; 3. Display area; 301. Temperature display; 302. PH display; 303. Liquid level display; 304. Flow display; 4. Water supply metal hose; 5. Automatic water supply valve; 6. Thermometer; 7. PH monitor; 8. Flip plate liquid level meter; 9. metal return hose; 10. outlet metal hose; 11. outlet flow meter; 1101. outlet main valve; 12. circulation pump; 1201. pump inlet valve; 13. filter; 1301. connecting cover; 1302. water inlet; 1303. water outlet; 1304. casing; 1305. filter element; 1306. waste discharge channel; 1307. waste discharge head; 1308. connecting frame; 1309. impeller; 1310. cleaning brush. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of 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.

[0022] Example

[0023] See also Figure 1-Figure 4 , the utility model provides a technical solution:

[0024] A cleaning device for a polyester heat exchanger comprises a stainless steel water storage tank 1, an observation hole 2 is provided at the front end of the top of the stainless steel water storage tank 1, a display area 3 is installed at the rear end of the top of the stainless steel water storage tank 1, a water supply metal hose 4 is fixedly connected to the top of the front of the stainless steel water storage tank 1, an automatic water supply valve 5 is fixedly installed on the water supply metal hose 4, a thermometer 6 and a pH monitor 7 are fixedly installed on the front of the stainless steel water storage tank 1 and below the water supply metal hose 4, a flap liquid level gauge 8 is fixedly installed on the left side of the stainless steel water storage tank 1, a metal reflux hose 9 and an outlet metal hose 10 are fixedly installed on the upper and lower ends of the back of the stainless steel water storage tank 1, and the front end of the metal reflux hose 9 extends to the bottom end inside the stainless steel water storage tank 1, an outlet flow meter 11 is fixedly installed at the front end of the outlet metal hose 10, a circulating pump 12 is fixedly installed at the front end of the outlet flow meter 11, and a filter 13 is fixedly installed between the circulating pump 12 and the stainless steel water storage tank 1.

[0025] First, a push handle 101 is fixedly installed on the top of the front of the stainless steel water storage tank 1, and moving wheels 102 are rotatably connected at the four corners of the bottom of the stainless steel water storage tank 1. Support feet 103 are threadedly connected at the four corners of the bottom of the stainless steel water storage tank 1 and located on the outside of the moving wheels 102. The stainless steel water storage tank 1 is pushed by the push handle 101, and the moving wheels 102 at the bottom of the stainless steel water storage tank 1 are used to facilitate movement. When the stainless steel water storage tank 1 is used to clean the polyester heat exchanger, the support feet 103 are rotated downward to make them rest against the ground to fix the stainless steel water storage tank 1.

[0026] Furthermore, a stainless steel cover 201 is rotatably connected to the outer side of the observation hole 2, a handle 202 is fixedly connected to the front end of the top of the stainless steel cover 201, and a transparent glass window 203 is fixedly installed at the rear end of the top of the stainless steel cover 201. The observation hole 2 opened on the top of the stainless steel water storage tank 1 is also a feeding port. After the stainless steel cover 201 is opened by the handle 202, acid or alkali is added through the feeding port. Citric acid or calcium alkali detergent is generally used for acid, and flaky alkali of sodium hydroxide is generally used for alkali. Acid and alkali are added in appropriate amounts according to the substance to be cleaned. The acidity is generally controlled at 3-4, and the alkalinity is generally controlled at 11-12 to avoid strong acid and alkali from damaging the equipment. When the stainless steel water storage tank 1 is working, the observation hole 2 is closed by the stainless steel cover 201 to prevent the solution in the water tank from splashing during the circulation process and burning the operator. At the same time, the internal situation can be observed through the transparent glass window 203.

[0027] Then, the display area 3 includes a temperature display 301, a PH display 302, a liquid level display 303 and a flow display 304. The temperature display 301, the PH display 302, the liquid level display 303 and the flow display 304 are electrically connected to the thermometer 6, the PH monitor 7, the flap liquid level meter 8 and the outlet flow meter 11 respectively. When the polyester heat exchanger cleaning device is running, the PH monitor 7 will monitor the PH value of the cleaning water in the stainless steel water storage tank 1 in real time and display it through the PH display 302. The PH value can be controlled within the required range by manually adding acid and alkali. At the same time, the temperature display 301 can be used to control the PH value of the cleaning water in the stainless steel water storage tank 1. , the liquid level display 303 and the flow display 304 monitor the temperature, liquid level and water flow rate in the stainless steel water storage tank 1. When the liquid level in the stainless steel water storage tank 1 is displayed to be lower than 50%, the automatic water replenishing valve 5 is automatically opened to replenish water. When the water is replenished to the liquid level of 85%, it is automatically closed and the water replenishment is stopped. At the same time, the corresponding safety interlock takes effect. When the outlet flow of the circulation pump 12 is lower than 3 tons / hour, the liquid level in the stainless steel water storage tank 1 is lower than 40%, and the temperature in the stainless steel water storage tank 1 is greater than 80°C, any of the above three items can trigger the emergency stop of the cleaning device. The circulation pump 12 can be opened again only after the cause is found out and restored to normal, so as to avoid damage to the circulation pump 12.

[0028] Furthermore, an outlet main valve 1101 is fixedly installed between the outlet flow meter 11 and the circulation pump 12, and a pump inlet valve 1201 is fixedly installed between the filter 13 and the stainless steel water storage tank 1. The water outlet is switched by the outlet main valve 1101, and the water inlet of the circulation pump 12 is controlled by the pump inlet valve 1201.

[0029] Secondly, the filter 13 includes a connecting cover 1301 fixedly installed between the circulation pump 12 and the pump inlet valve 1201, the front and rear ends of the connecting cover 1301 are respectively provided with a water inlet 1302 and a water outlet 1303, the bottom of the connecting cover 1301 is threadedly connected with a casing 1304, a filter element 1305 is movably installed inside the casing 1304, a waste discharge channel 1306 is opened at the bottom end of the casing 1304, and a waste discharge head 1307 is threadedly connected to the bottom of the casing 1304. After the water is discharged from the stainless steel water storage tank 1, it enters the casing 1304 through the water inlet 1302, and the solid impurities in the water are filtered by the filter element 1305, and the filtered water is discharged through the water outlet 1303 to avoid the circulation pump. 12 affects the interior of the polyester heat exchanger. Generally, the circulation cleaning time of the heat exchanger is 24 hours, but the circulation time can be adjusted independently according to the cleaning effect. After the polyester heat exchanger cleaning device is shut down, the filter 13 needs to be disassembled and cleaned. First, the stainless steel water storage tank 1 is emptied through the outlet metal hose 10, and the sediment at the bottom of the stainless steel water storage tank 1 is cleaned. Finally, clean water is self-circulated and drained for standby use. When cleaning the filter 13, a small amount of impurities inside it accumulates in the waste discharge channel 1306, which can be directly discharged by unscrewing the waste discharge head 1307. If there are too many impurities inside, the shell 1304 can be unscrewed to remove the filter element 1305, and the inside can be fully cleaned to ensure the filtering effect of the filter 13.

[0030] Finally, a connecting frame 1308 is fixedly installed on the top of the filter element 1305, and an impeller 1309 is rotatably connected to the bottom of the connecting frame 1308. A cleaning brush 1310 is fixedly connected to the bottom of the impeller 1309. During the operation of the filter 13, when water is filtered through the filter element 1305, the water flows inside the filter element 1305, which drives the impeller 1309 to rotate, thereby driving the cleaning brush 1310 to sweep the inside of the filter element 1305, thereby preventing impurities from adhering to the filter element 1305 and affecting the filtering effect, thereby ensuring the cleaning effect of the polyester heat exchanger.

[0031] In this embodiment, the implementation scenario is specifically as follows: when cleaning the polyester heat exchanger, first connect the metal reflux hose 9 and the outlet metal hose 10 to the two ends of the polyester heat exchanger respectively. The volume of the stainless steel water storage tank 1 is 1.5 cubic meters. Add about 1 cubic meter of clean water into the stainless steel water storage tank 1. The general liquid level is displayed at about 70%. Start the circulation pump 12 to circulate the clean water, and filter the outlet water through the filter 13 to avoid affecting the circulation pump 12 and the interior of the polyester heat exchanger. The circulating water volume is adjusted at 10 tons through the pump inlet valve 1201 of the circulation pump 12. / hour or so, the flow rate can be adjusted appropriately according to the size of the heat exchanger to be cleaned, the maximum circulation volume of the circulating pump 12 is 15 tons / hour, acid or alkali is added through the observation hole 2, the PH monitor 7 will monitor the PH value of the cleaning water in the stainless steel water storage tank 1 in real time and display it through the PH display 302, and the PH value can be controlled within the required range by manually adding acid and alkali. At the same time, the temperature, liquid level and water flow rate in the stainless steel water storage tank 1 can be monitored through the temperature display 301, the liquid level display 303 and the flow display 304. If the liquid level in the stainless steel water storage tank 1 is lower than 50%, it will automatically Open the automatic water filling valve 5 to fill water. When the water filling reaches 85%, it will automatically close and stop filling water. At the same time, the corresponding safety interlock will take effect. When the outlet flow of the circulating pump 12 is lower than 3 tons / hour, the liquid level in the stainless steel water storage tank 1 is lower than 40%, and the temperature in the stainless steel water storage tank 1 is greater than 80°C, any of the above three items can trigger the emergency stop of the cleaning device. The circulating pump 12 can be opened again after the cause is found out and restored to normal to avoid damage to the circulating pump 12. Generally, the circulation cleaning time of the heat exchanger is 24 hours, but the circulation time can be adjusted independently according to the cleaning effect. In the polyester heat exchanger cleaning device After shutdown, the filter 13 needs to be disassembled and cleaned, and the stainless steel water storage tank 1 is first emptied through the outlet metal hose 10, and the sediment at the bottom of the stainless steel water storage tank 1 is cleaned, and finally the clean water is self-circulated and drained for standby use. The whole operation process is simple and convenient. Compared with the existing cleaning device of the polyester heat exchanger, the utility model is designed to continuously dissolve and circulate the polyester heat exchanger, which can achieve a good cleaning effect, thereby significantly reducing the energy consumption of the polyester heat exchanger in the daily production process. At the same time, it has a variety of self-protection safety interlocks to avoid damage to the circulation pump 12, and it is easy to operate and maintain.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cleaning device for a polyester heat exchanger, comprising a stainless steel water storage tank (1), characterized in that: The front end of the top of the stainless steel water storage tank (1) is provided with an observation hole (2), the rear end of the top of the stainless steel water storage tank (1) is provided with a display area (3), the top of the front of the stainless steel water storage tank (1) is fixedly connected with a water supply metal hose (4), the water supply metal hose (4) is fixedly provided with an automatic water supply valve (5), the front of the stainless steel water storage tank (1) and below the water supply metal hose (4) are respectively fixedly provided with a thermometer (6) and a pH monitor (7), and the left side of the stainless steel water storage tank (1) is fixedly provided with a water supply valve (5). A flap level gauge (8) is provided, and a metal return hose (9) and an outlet metal hose (10) are respectively fixedly installed at the upper and lower ends of the back of the stainless steel water storage tank (1), and the front end of the metal return hose (9) extends to the bottom end inside the stainless steel water storage tank (1), and an outlet flow meter (11) is fixedly installed at the front end of the outlet metal hose (10), and a circulation pump (12) is fixedly installed at the front end of the outlet flow meter (11), and a filter (13) is fixedly installed between the circulation pump (12) and the stainless steel water storage tank (1).

2. The cleaning device for a polyester heat exchanger according to claim 1, characterized in that: A push handle (101) is fixedly mounted on the top of the front face of the stainless steel water storage tank (1), and moving wheels (102) are rotatably connected to the four corners of the bottom of the stainless steel water storage tank (1), and support feet (103) are threadedly connected to the four corners of the bottom of the stainless steel water storage tank (1) and on the outside of the moving wheels (102).

3. The cleaning device for a polyester heat exchanger according to claim 1, characterized in that: A stainless steel cover (201) is rotatably connected to the outer side of the observation hole (2), a handle (202) is fixedly connected to the front end of the top of the stainless steel cover (201), and a transparent glass window (203) is fixedly installed at the rear end of the top of the stainless steel cover (201).

4. The cleaning device for a polyester heat exchanger according to claim 1, characterized in that: The display area (3) comprises a temperature display (301), a pH display (302), a liquid level display (303) and a flow rate display (304), and the temperature display (301), the pH display (302), the liquid level display (303) and the flow rate display (304) are electrically connected to the thermometer (6), the pH monitor (7), the flap liquid level meter (8) and the outlet flow meter (11), respectively.

5. The cleaning device for a polyester heat exchanger according to claim 1, characterized in that: An outlet main valve (1101) is fixedly installed between the outlet flow meter (11) and the circulation pump (12), and a pump inlet valve (1201) is fixedly installed between the filter (13) and the stainless steel water storage tank (1).

6. The cleaning device for a polyester heat exchanger according to claim 5, characterized in that: The filter (13) comprises a connection cover (1301) fixedly installed between the circulation pump (12) and the pump inlet valve (1201); a water inlet (1302) and a water outlet (1303) are respectively provided at the front and rear ends of the connection cover (1301); a casing (1304) is threadedly connected to the bottom of the connection cover (1301); a filter element (1305) is movably installed inside the casing (1304); a waste discharge channel (1306) is provided at the bottom end of the casing (1304); and a waste discharge head (1307) is threadedly connected to the bottom of the casing (1304).

7. The cleaning device for a polyester heat exchanger according to claim 6, characterized in that: A connecting frame (1308) is fixedly installed at the top of the filter element (1305), an impeller (1309) is rotatably connected to the bottom of the connecting frame (1308), and a cleaning brush (1310) is fixedly connected to the bottom of the impeller (1309).

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