Plate heat exchanger cleaning device

Abstract

The utility model relates to a plate heat exchanger cleaning device which comprises a dosing barrel, a chemical cleaning pump and a stainless steel security filter, a liquid medicine outlet is formed in the bottom end of the right side of the dosing barrel, and the liquid medicine outlet is connected with the liquid inlet end of the chemical cleaning pump through a UPVC pipe. The liquid outlet end of the chemical cleaning pump is connected with a filter inlet formed in the bottom end of the left side of the stainless steel security filter through a seamless steel pipe; a filter outlet is formed in the middle of the left side of the stainless steel security filter, the filter outlet is connected with a heat exchanger inlet flange of the plate heat exchanger through a stainless steel metal hose, and a heat exchanger outlet of the plate heat exchanger is connected with a cleaning liquid reflux inlet formed in the top end of the dosing barrel through a stainless steel metal hose. The problem of scale deposition of the plate heat exchanger is solved in a chemical cleaning mode, the situation that fins are physically cleaned one by one is changed, the shutdown maintenance time is shortened, and the equipment operation rate is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of cleaning devices, in particular to a cleaning device for a plate heat exchanger. Background Art

[0002] The plate heat exchangers of the original power station water ring vacuum pump and lubricating oil station play the role of heat exchange and cooling the working medium in the production process. In particular, the fouling of the plate fin flow channel of the water ring vacuum pump of the power station will greatly reduce the heat exchange effect after long-term operation, causing the working medium temperature to rise, triggering vacuum pump cavitation, reducing the output of the vacuum pump, and thus reducing the vacuum of the condenser of the power station, affecting the power generation efficiency of the power station. In addition, the fouling of the plate heat exchanger in the lubricating oil system will cause the temperature of the lubricating oil to rise, which is easy to cause the lubricating oil to oxidize and deteriorate, and the viscosity of the lubricating oil will decrease, resulting in a decrease in the lubrication effect. The contact points between the bearing surfaces are subjected to large changes in force, which is prone to friction damage and wear, thereby shortening the bearing life and affecting the service life cycle of the equipment.

[0003] Normally, plate heat exchangers are mostly cleaned manually, through manual disassembly and physical cleaning of each piece. The workload of disassembly and assembly during the cleaning process is large, and it is easy to make mistakes during the reinstallation process, which may even cause the equipment to be unable to operate normally. The long downtime required for cleaning has a certain impact on production. Utility Model Content

[0004] The utility model aims to provide a plate heat exchanger cleaning device, which solves the problem in the prior art that the scale inside the plate cannot be cleaned quickly, thereby reducing the production efficiency.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] The utility model provides a plate heat exchanger cleaning device, comprising a dosing barrel, a chemical cleaning pump and a stainless steel security filter, wherein a liquid medicine outlet is arranged at the right bottom end of the dosing barrel, the liquid medicine outlet is connected to the liquid inlet end of the chemical cleaning pump through a UPVC pipe, and the liquid outlet end of the chemical cleaning pump is connected to the filter inlet arranged at the left bottom end of the stainless steel security filter through a seamless steel pipe;

[0007] A filter outlet is arranged in the middle of the left side of the stainless steel safety filter, and the filter outlet is connected to the inlet flange of the plate heat exchanger through a stainless steel metal hose, and the outlet of the plate heat exchanger is connected to the cleaning liquid reflux port arranged at the top of the dosing barrel through a stainless steel metal hose.

[0008] Furthermore, a dosing port is provided at the top of the dosing barrel for replenishing the medicine solution.

[0009] Furthermore, an overflow port is provided on the upper left side of the dosing barrel to prevent the dosing barrel from overflowing the liquid medicine.

[0010] Furthermore, a sewage outlet of the dosing barrel is arranged at the lower left side of the dosing barrel for draining the liquid in the barrel.

[0011] Furthermore, a stainless steel manual ball valve is provided between the dosing barrel and the chemical cleaning pump to cut off the fluid passage between the dosing barrel and the chemical cleaning pump.

[0012] Furthermore, a clamp-type butterfly valve is provided between the chemical cleaning pump and the stainless steel security filter to control the flow direction of the fluid between the chemical cleaning pump and the stainless steel security filter.

[0013] Furthermore, a reducing pipe is provided between the chemical cleaning pump and the stainless steel security filter, on a side close to the chemical cleaning pump, for adjusting the fluid flow rate.

[0014] Furthermore, a first on-site pressure gauge is provided at the upper end of the right side wall of the stainless steel security filter, and a second on-site pressure gauge is provided at the lower end of the right side wall of the stainless steel security filter. The first on-site pressure gauge and the second on-site pressure gauge are connected through a differential pressure gauge, and the differential pressure gauge is used to monitor the filter element pressure difference in the stainless steel security filter.

[0015] Furthermore, a third on-site pressure gauge is provided at the top of the stainless steel safety filter, and the third on-site pressure gauge is connected to an exhaust port, and the exhaust port is used to adjust the pressure balance in the stainless steel safety filter.

[0016] Furthermore, a filter drain port is provided at the right bottom end of the stainless steel safety filter for draining filter element washing liquid.

[0017] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0018] The utility model discloses a plate heat exchanger cleaning device, in which a chemical liquid detergent is connected to the plate heat exchanger, and the chemical liquid detergent is pumped into a stainless steel safety filter through a chemical cleaning pump, and then transported to the plate heat exchanger. Through the continuous circulation of the chemical cleaning pump, the chemical liquid is contacted and reacted with the dirt on the plate heat exchanger, and the dirt is cleaned and peeled off, thereby achieving overall cleaning of the fins of the plate heat exchanger and effectively removing rust and dirt in the heat exchanger. Moreover, this set of device is a skid-mounted integrated equipment, which is easy to disassemble and transport, and can be used for cleaning plate heat exchangers on different production lines, greatly improving the operating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0020] Figure 1 This is a device diagram of a plate heat exchanger cleaning device provided by the utility model;

[0021] The reference numerals are described as follows:

[0022] 1. Dosing barrel; 101. Liquid outlet; 102. Cleaning liquid reflux port; 103. Dosing port; 104. Overflow port; 105. Dosing barrel drain port; 2. Chemical cleaning pump; 201. Liquid inlet; 202. Liquid outlet; 3. Stainless steel security filter; 301. Filter inlet; 302. Filter outlet; 303. First on-site pressure gauge; 304. Second on-site pressure gauge; 305. Pressure differential gauge; 306. Third on-site pressure gauge; 307. Exhaust port; 308. Filter drain port; 4. Plate heat exchanger; 401. Heat exchanger inlet; 402. Heat exchanger outlet; 5. UPVC pipe; 6. Seamless steel pipe; 7. Stainless steel metal hose; 8. Stainless steel manual ball valve; 9. Wafer-type butterfly valve; 10. Reducer. DETAILED DESCRIPTION

[0023] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1 As shown, the plate heat exchanger cleaning device uses a plate heat exchanger 4 as a carrier, and the plate heat exchanger 4 is sequentially connected to a dosing barrel 1, a chemical cleaning pump 2 and a stainless steel safety filter 3.

[0025] The dosing barrel 1 is used to store the chemical cleaning liquid required for cleaning the plate heat exchanger 1. The components of the chemical cleaning liquid mainly include organic acid, oxidizing bactericide sodium hypochlorite and industrial water. The above main components are mixed and prepared into a cleaning liquid of a certain concentration. The organic acid contained in the components can remove rust and scale from the fins inside the plate heat exchanger 4, and the sodium hypochlorite has a sterilizing and peeling effect. In addition, when actually applying cleaning, the operator can change or reorganize the components contained in the chemical cleaning liquid according to actual needs, thereby improving the actual cleaning efficiency.

[0026] A liquid medicine outlet 101 is provided at the right bottom end of the medicine adding barrel 1, and the liquid medicine outlet 101 is connected to the liquid inlet 201 end of the chemical cleaning pump 2 through a UPVC pipe 5, thereby transporting the cleaning liquid to the cleaning pump.

[0027] Relative to the liquid inlet 201, the other end of the chemical cleaning pump 2 is provided with a liquid outlet 202, and the liquid outlet 202 is connected to the filter inlet 301 of the stainless steel security filter 3 through a seamless steel pipe 6, and the filter inlet 301 is arranged at the bottom end of the left side of the filter; at the same time, a filter outlet 302 is opened in the middle of the left side of the filter, and the filter outlet 302 is flange-connected to the heat exchanger inlet 401 of the plate heat exchanger 4 through a stainless steel metal hose 7, and the heat exchanger outlet 402 located above the heat exchanger inlet 401 is connected to the cleaning liquid reflux port 102 arranged at the top of the dosing barrel 1 through the stainless steel metal hose 7.

[0028] Thus, the dosing barrel 1, the chemical cleaning pump 2, the stainless steel safety filter 3 and the plate heat exchanger 4 are connected in series to form a circulating cleaning production line, thereby realizing the overall cleaning of the plate heat exchanger without disassembling the fins inside the heat exchanger one by one for cleaning and then reinstalling them.

[0029] A dosing port 103 is also provided at the top of the dosing barrel 1, and the dosing liquid can be replenished when the washing liquid is insufficient; the washing liquid reflux port 102 provided on the barrel can also recycle the washing liquid after being cleaned by the plate heat exchanger 4 into the dosing barrel 1 for recycling, thereby maximizing the utilization of the washing liquid.

[0030] An overflow port 104 is provided on the upper left side of the medicine adding barrel 1 to prevent the medicine liquid from overflowing from the barrel, and to prevent the pressure in the medicine adding barrel 1 from being too high, resulting in the medicine liquid splashing. A medicine adding barrel sewage outlet 105 is provided on the lower left side of the medicine adding barrel 1 to discharge the waste liquid used to clean the fins, and when cleaning is not required, the inside of the medicine adding barrel 1 can be cleaned, and then the water can be discharged through the sewage outlet.

[0031] In this embodiment, a stainless steel manual ball valve 8 is provided on the UPVC pipe 5 , that is, between the dosing barrel 1 and the chemical cleaning pump 2 , for cutting off or opening the fluid passage between the dosing barrel 1 and the chemical cleaning pump 2 .

[0032] In addition, a pair of clamp-type butterfly valves 9 are arranged on the seamless steel pipe 6 arranged in this embodiment, that is, between the chemical cleaning pump 2 and the stainless steel security filter 3, for controlling the fluid flow direction between the pump and the filter; the setting of the clamp-type butterfly valve 9 adopts a clamping structure, and the corresponding fluid resistance is relatively small and the sealing performance is good.

[0033] In addition, a reducer 10 is arranged between the chemical cleaning pump 2 and the stainless steel safety filter 3, on the side close to the chemical cleaning pump 2. The setting of the reducer 10 can reduce the resistance loss in the pipeline, thereby reducing the working pressure of the pump, adjusting the flow rate of the fluid accordingly, and optimizing the fluid flow characteristics in the pipeline.

[0034] In this embodiment, the stainless steel security filter 3 is mainly used to filter impurities or dirt carried in the washing liquid after circulating cleaning, thereby improving the cleaning effect. A plurality of local pressure gauges are arranged on the right side wall of the stainless steel security filter 3. First, a first local pressure gauge 303 is arranged at the upper end of the right side wall, and a second local pressure gauge 304 is arranged at the lower end of the right side wall, and a differential pressure gauge 305 is arranged between the two pressure gauges for connection.

[0035] The first local pressure gauge 303 is used to monitor the filter element pressure at the upper end of the filter, and the second local pressure gauge 304 is used to monitor the filter element pressure at the lower end of the filter. Then, by observing the difference on the pressure differential gauge 305, it is determined whether the filter element in the filter needs to be replaced or cleaned. Because when the filter element pressure difference becomes larger, there may be blockage inside the filter element, and the larger the pressure difference, the higher the probability of blockage. At this time, the filter element must be replaced or cleaned before it can be used again.

[0036] A third on-site pressure gauge 306 is also provided at the top of the stainless steel safety filter 3, and an exhaust port 307 is connected to the pressure gauge. When the pressure value monitored by the third on-site pressure gauge 306 is too high, in order not to affect the normal operation of the filter, the exhaust port 307 can be opened to release the pressure appropriately and adjust the pressure inside the entire filter to a balanced state.

[0037] A filter drain port 308 is also provided at the right bottom end of the filter, and when the filter element in the filter needs to be cleaned, the cleaning liquid of the filter element can be discharged therefrom.

[0038] The utility model provides a circulating plate heat exchanger cleaning device, which pumps chemical cleaning liquid into a stainless steel safety filter 3 and then transports it to the plate heat exchanger 4 to be cleaned, thereby achieving overall cleaning of the plate heat exchanger 4 without disassembly; the cleaning effect is significantly improved, and the cleaning time is significantly shortened. In addition, the device is a skid-mounted integrated device, which is easy to disassemble and transport, and can be used for cleaning plate heat exchangers on different production lines, greatly improving the operating efficiency.

[0039] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly. 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 should be included in the protection scope of the utility model.

Claims

1. A plate heat exchanger cleaning device, characterized in that: It comprises a dosing barrel (1), a chemical cleaning pump (2) and a stainless steel security filter (3), wherein a liquid medicine outlet (101) is arranged at the right bottom end of the dosing barrel (1), the liquid medicine outlet (101) is connected to the liquid inlet (201) end of the chemical cleaning pump (2) through a UPVC pipe (5), and the liquid outlet (202) end of the chemical cleaning pump (2) is connected to a filter inlet (301) arranged at the left bottom end of the stainless steel security filter (3) through a seamless steel pipe (6); A filter outlet (302) is provided in the middle of the left side of the stainless steel safety filter (3); the filter outlet (302) is flange-connected to the heat exchanger inlet (401) of the plate heat exchanger (4) via a stainless steel metal hose (7); the heat exchanger outlet (402) of the plate heat exchanger (4) is connected to the cleaning liquid return port (102) provided at the top of the dosing barrel (1) via a stainless steel metal hose (7).

2. A plate heat exchanger cleaning device according to claim 1, characterized in that: The top of the medicine adding barrel (1) is also provided with a medicine adding port (103) for replenishing medicine liquid.

3. A plate heat exchanger cleaning device according to claim 1, characterized in that: An overflow port (104) is provided on the upper left side of the dosing barrel (1) to prevent overflow of liquid medicine from the dosing barrel (1).

4. A plate heat exchanger cleaning device according to claim 1, characterized in that: A dosing barrel drain port (105) is provided at the lower left side of the dosing barrel (1) for draining liquid in the barrel.

5. A plate heat exchanger cleaning device according to claim 1, characterized in that: A stainless steel manual ball valve (8) is provided between the dosing barrel (1) and the chemical cleaning pump (2) for cutting off the fluid passage between the dosing barrel (1) and the chemical cleaning pump (2).

6. A plate heat exchanger cleaning device according to claim 1, characterized in that: A wafer-type butterfly valve (9) is provided between the chemical cleaning pump (2) and the stainless steel safety filter (3) for controlling the flow direction of the fluid between the chemical cleaning pump (2) and the stainless steel safety filter (3).

7. A plate heat exchanger cleaning device according to claim 1, characterized in that: A reducing pipe (10) is provided between the chemical cleaning pump (2) and the stainless steel safety filter (3), on a side close to the chemical cleaning pump (2), for adjusting the flow rate of the fluid.

8. A plate heat exchanger cleaning device according to claim 1, characterized in that: A first local pressure gauge (303) is provided at the upper end of the right side wall of the stainless steel safety filter (3), and a second local pressure gauge (304) is provided at the lower end of the right side wall of the stainless steel safety filter (3). The first local pressure gauge (303) and the second local pressure gauge (304) are connected via a differential pressure gauge (305), and the differential pressure gauge (305) is used to monitor the differential pressure of the filter element in the stainless steel safety filter (3).

9. A plate heat exchanger cleaning device according to claim 1, characterized in that: A third local pressure gauge (306) is provided at the top of the stainless steel safety filter (3); the third local pressure gauge (306) is connected to an exhaust port (307); and the exhaust port (307) is used to adjust the pressure balance in the stainless steel safety filter (3).

10. A plate heat exchanger cleaning device according to claim 1, characterized in that: The bottom right end of the stainless steel safety filter (3) is provided with a filter drain port (308) for draining filter element washing liquid.

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