Energy-saving heat exchanger of dipping machine

Abstract

The utility model discloses an energy-saving heat exchanger of a dipping machine. The energy-saving heat exchanger comprises a heat exchange box, a heat exchange tube set and a spraying cleaning device. A heat exchange tube group is arranged in the heat exchange box, and a plurality of heat exchange tubes of the heat exchange tube group are vertically arranged; a spraying and cleaning device is arranged in the heat exchange box, and a sprayer of the spraying and cleaning device is arranged on the top of the heat exchange pipe set. When the production line works, water sprayed by the sprayer cleans the outside of the heat exchange tube under the action of hot waste gas in the gas inlet; when the machine is shut down for maintenance, the heat exchange tube set is soaked in water sprayed by the sprayer. By means of online spraying cleaning and soaking cleaning during shutdown of the heat exchanger, residual dirt on the heat exchanger is effectively removed, heat exchange efficiency is greatly improved, and the service life of the heat exchanger is greatly prolonged.

Description

Technical Field

[0001] The utility model discloses an energy-saving heat exchanger for an impregnation machine, and relates to the technical field of paper processing equipment production. Background Art

[0002] The impregnation machine is a piece of industrial equipment used in the production of film paper. During the production process, the paper needs to be impregnated, coated, and dried. Taking the melamine impregnation machine production line as an example, the drying process of the impregnated paper produces exhaust gas, which contains a lot of water vapor, solvents, and volatile particles. If these exhaust gases are not discharged, the drying effect will be directly affected. However, if these exhaust gases are discharged directly, a considerable amount of heat will be carried away, resulting in energy waste. Currently, the market uses aluminum foil air rotary heat exchangers, honeycomb aluminum foil plate heat exchanger boxes, and heat pipe heat exchangers for waste heat recovery. Due to the small pores between the aluminum foil, scaling and clogging can cause difficulty in cleaning, affecting the heat exchange effect. In addition, the service life is short and maintenance is difficult, which cannot meet market demand. Therefore, the market needs a heat exchanger specifically for impregnation machinery with a simple structure, high heat exchange efficiency, easy cleaning, and a long service life. Summary of the Invention

[0003] The utility model aims to provide a heat exchanger specially used for an impregnation machine, which has the advantages of simple structure, high heat exchange efficiency, easy cleaning and long service life.

[0004] In view of the above technical problems, the present invention provides an energy-saving heat exchanger for an immersion machine, comprising a heat exchange box, a heat exchange tube group and a spray cleaning device. A heat exchange tube group is provided in the heat exchange box, and the heat exchange tubes of the heat exchange tube group are arranged vertically. The heat exchange tube group is divided into two parts working in series, a fresh air intake box is provided at the lower right part of the heat exchange box, and a fresh air exhaust chamber is provided at the lower left part of the heat exchange box. An air inlet is provided on the side of the box body of the heat exchange box, and an exhaust port is provided on the upper part of the air inlet; an air duct is provided on the top of the heat exchange box. Side doors are provided on the left and right sides of the box body of the heat exchange box, and a spray cleaning device is provided in the heat exchange box, and the sprayer of the spray cleaning device is provided on the top of the heat exchange tube group; a drain pipe is provided at the bottom of the heat exchange box. The water sprayed by the sprayer cleans the outside of the heat exchange tube under the action of the flow of hot exhaust gas in the air inlet.

[0005] Preferably, an air inlet is provided at the lower right side of the heat exchange box body, and an air outlet is provided at the upper left side of the heat exchange box body.

[0006] Preferably, the heat exchange tube group is composed of three parts and works in series through the air duct. The fresh air inlet box is arranged at the upper right part of the heat exchange box, the fresh air exhaust chamber is arranged at the lower left part of the heat exchange box, the air inlet is arranged at the lower right part of the heat exchange box body, and the exhaust port is arranged at the upper left side of the heat exchange box body.

[0007] Preferably, the perforated plate of the sprinkler is mounted on top of the heat exchange tube bank, with its frame fixed to the inner wall of the heat exchange box. Heat exchange tubes are positioned in the water holes of the perforated plate. Spray water from the top of the perforated plate flows downward through the gaps between the heat exchange tubes and the water holes, cleaning the tube walls.

[0008] Preferably, a control valve is provided on the drain pipe, an air inlet valve is provided on the air inlet, and an exhaust valve is provided on the exhaust port. When the control valve, air inlet valve, and exhaust valve are closed simultaneously, water sprayed from the sprayer floods the heat exchange tube group for soaking and cleaning.

[0009] Preferably, a control valve is provided on the drain pipe, a return pipe is provided on the top of the heat exchange box, an air inlet pipe is provided on the air inlet, and an exhaust pipe is provided on the exhaust port. When the control valve is closed, water sprayed from the sprinkler floods the heat exchange tube group for soaking and cleaning.

[0010] Preferably, an aeration device is provided at the bottom of the heat exchange tube group, and the aeration device performs cleaning work by aeration through high-pressure gas in water.

[0011] Preferably, a heater is provided at the bottom of the heat exchange tube group.

[0012] Preferably, an ultrasonic cleaner is provided at the bottom of the heat exchange tube group.

[0013] Beneficial effects

[0014] Based on the above technical solution, the utility model provides an energy-saving heat exchanger for an immersion machine, which has at least one of the following beneficial effects:

[0015] 1. After the heat exchange tube group in the exchange box is divided into two parts and works in series, three heat exchange cycle modes can be selected according to work needs, with obvious energy saving effect;

[0016] 2. Energy-saving heat exchanger of the impregnation machine. Scaling during use is the biggest factor affecting the heat exchange efficiency of the heat exchanger. The utility model adopts vertical spraying to clean the heat exchange tubes of the heat exchanger. At the same time, the stirring effect of the hot exhaust gas from the air inlet is used to improve the cleaning effect. The intermittent spraying method can be used to spray and clean the heat exchanger in the case of continuous production. It has a simple structure and is easy to use.

[0017] 3. During shutdown and maintenance, water immersion cleaning is used to effectively remove residual scale on the heat exchange tubes; high-pressure gas water aeration, hot water boiling and ultrasonic cleaning technology are used to deeply clean the heat exchanger, which greatly improves the heat exchange efficiency and service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a working schematic diagram of an energy-saving heat exchanger of an immersion machine according to the utility model.

[0019] Figure 2 It is a top view of an energy-saving heat exchanger for an immersion machine according to the utility model.

[0020] Figure 3 The utility model is a schematic diagram of heat exchange operation of an energy-saving heat exchanger of an impregnation machine.

[0021] Figure 4 This is a schematic diagram of three sets of heat exchangers working in series in the present invention.

[0022] Main accessories symbol description

[0023] 101-heat exchange box; 102-heat exchange tube group; 103-fresh air inlet box; 104-air inlet; 105-exhaust outlet; 106-side door; 107-spray cleaning device; 108-sprinkler; 109-drain pipe; 110-heat exchange tube; 111-fresh air exhaust chamber; 112-air duct; 113-first heat exchange tube group; 114-downwind duct; 115-upwind duct; 116-second heat exchange tube group; 117-third heat exchange tube group; 201-porous plate; 202-water spray hole; 203-control valve; 204-return pipe; 205-inlet pipe; 206-exhaust pipe; 207-aeration device; 210-inlet valve; 211-exhaust valve. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0025] like Figure 1 、 Figure 2 As shown, an energy-saving heat exchanger for an immersion machine includes a heat exchange box 101, a heat exchange tube group 102 and a spray cleaning device. A heat exchange tube group 102 is provided in the heat exchange box 101, and the heat exchange tubes 110 of the heat exchange tube group 102 are arranged vertically. The heat exchange tube group 102 is divided into two parts. The heat exchange tube groups 102 work in series. A fresh air intake box 103 is provided at the lower right part of the heat exchange box 101, and a fresh air exhaust chamber 111 is provided at the lower left part of the heat exchange box 101. An air inlet 104 is provided on the side of the box body of the heat exchange box 101, an exhaust port 105 is provided on the upper part of the air inlet 104, and an air duct 112 is provided on the top of the heat exchange box 101. After the fresh air enters the heat exchange tube group 102 on the right side from the fresh air intake box 103, it enters the heat exchange tube group 102 on the left side through the air duct 112 and is then discharged. As shown Figure 3 As shown, in the second cycle working mode of heat exchange, the air inlet 104 is set at the lower right side of the heat exchange box 101, and the exhaust port 105 is set at the upper left side of the heat exchange box 101; the hot exhaust gas passes through the heat exchange tube group 102 on the left and the heat exchange tube group 102 on the right in turn and is discharged. Figure 4As shown, in the third heat exchange cycle operating mode, the heat exchange tube group 102 comprises three heat exchange tube groups 102 connected in series via two air ducts 112. A fresh air intake box 103 is located in the upper right portion of the heat exchange box 101, and a fresh air exhaust chamber 111 is located in the lower left portion of the heat exchange box 101. An air intake port 104 is located in the lower right portion of the heat exchange box 101, and an exhaust port 105 is located in the upper left portion of the heat exchange box 101. The fresh air in the fresh air intake box 103 passes through the first heat exchange tube group 113, the lower air duct 114, the second heat exchange tube group 116, the upper air duct 115, and the third heat exchange tube group 117 in sequence before being discharged from the fresh air exhaust chamber 111. The heat exchange box 101 is provided with side doors 106 on the left and right sides of the box body. A spray cleaning device 107 is provided in the heat exchange box 101. The sprayer 108 of the spray cleaning device 107 is provided on the top of the heat exchange tube group 102. A drain pipe 109 is provided at the bottom of the heat exchange box 101. The water sprayed by the sprayer 108 cleans the outside of the heat exchange tube 110 under the action of the flow of hot exhaust gas in the air inlet 104. Figure 2 As shown, the porous plate 201 of the sprayer 108 is set on the top of the heat exchange tube group 102. The frame of the porous plate 201 is fixed to the inner wall of the heat exchange box 101. The heat exchange tube 110 is set in the water spray hole 202 of the porous plate 201. The spray water on the upper part of the porous plate 201 flows downward along the tube wall surface of the heat exchange tube 110 through the gap between the heat exchange tube 110 and the water spray hole 202. Figure 1 As shown, a control valve 203 is provided on the drain pipe 109, an air inlet valve 210 is provided on the air inlet 104, and an exhaust valve 211 is provided on the exhaust port 105. The control valve 203, the air inlet valve 210 and the exhaust valve 211 are closed, and the water sprayed by the sprayer 108 floods the heat exchange tube group 102 for soaking and cleaning. Figure 1 As shown, a control valve 203 is installed on the drain pipe 109, a return pipe 204 is installed on the top of the heat exchange box 101, an air inlet pipe 205 is installed on the air inlet 104, and an exhaust pipe 206 is installed on the exhaust port 105. With the control valve 203 closed, the heat exchange tube group 102 is immersed in water sprayed by the sprayer 108. An aeration device 207 is installed at the bottom of the heat exchange tube group 102. Aeration device 207 uses high-pressure gas to aerate the water for cleaning. To improve the cleaning effect, a heater is installed at the bottom of the heat exchange tube group 102 to heat water for boiling cleaning. An ultrasonic cleaner is also installed at the bottom of the heat exchange tube group 102 to use ultrasonic cleaning.

[0026] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An energy-saving heat exchanger for an immersion machine, characterized in that: include: A heat exchange tube group (102) is provided in the heat exchange box (101), and the heat exchange tubes (110) of the heat exchange tube group (102) are arranged vertically; the heat exchange tube group (102) is divided into two parts and works in series, a fresh air intake box (103) is provided at the lower right part of the heat exchange box (101), and a fresh air exhaust chamber (111) is provided at the lower left part of the heat exchange box (101); an air inlet (104) is provided on the side of the box body of the heat exchange box (101), and an exhaust port (105) is provided above the air inlet (104). The heat exchange box (101) An air duct (112) is provided on the top of the heat exchange box (101); side doors (106) are provided on the left and right sides of the box body of the heat exchange box (101); a spray cleaning device (107) is provided in the heat exchange box (101), a sprayer (108) of the spray cleaning device (107) is provided on the top of the heat exchange tube group (102), and a drain pipe (109) is provided at the bottom of the heat exchange box (101); water sprayed from the sprayer (108) cleans the outside of the heat exchange tube (110) under the flow of hot exhaust gas in the air inlet (104).

2. The energy-saving heat exchanger for an impregnation machine according to claim 1, characterized in that: An air inlet (104) is provided at the lower right side of the heat exchange box (101), and an air outlet (105) is provided at the upper left side of the heat exchange box (101).

3. The energy-saving heat exchanger for an impregnation machine according to claim 1, characterized in that: The heat exchange tube group (102) is composed of three parts and works in series through an air duct (112); the fresh air intake box (103) is arranged at the upper right part of the heat exchange box (101); the fresh air exhaust chamber (111) is arranged at the lower left part of the heat exchange box (101); an air inlet (104) is arranged at the lower right part of the box body of the heat exchange box (101); and an exhaust port (105) is arranged at the upper left side of the box body of the heat exchange box (101).

4. The energy-saving heat exchanger for an impregnation machine according to claim 1 or 2, characterized in that: The porous plate (201) of the sprayer (108) is arranged on the top of the heat exchange tube group (102), the frame of the porous plate (201) is fixed on the inner wall of the heat exchange box (101), and the heat exchange tube (110) is arranged in the water spraying hole (202) of the porous plate (201); the spray water on the upper part of the porous plate (201) flows downward from the gap between the heat exchange tube (110) and the water spraying hole (202) to clean the tube wall surface of the heat exchange tube (110).

5. The energy-saving heat exchanger for an impregnation machine according to claim 1 or 2, characterized in that: A control valve (203) is provided on the drainage pipe (109), an air intake valve (210) is provided on the air intake port (104), and an exhaust valve (211) is provided on the exhaust port (105); when the control valve (203), the air intake valve (210), and the exhaust valve (211) are closed, water sprayed from the sprayer (108) soaks the heat exchange tube group (102).

6. The energy-saving heat exchanger for an impregnation machine according to claim 5, characterized in that: A control valve (203) is provided on the drainage pipe (109), a return pipe (204) is provided on the top of the heat exchange box (101), an air intake pipe (205) is provided on the air inlet (104), and an exhaust pipe (206) is provided on the exhaust port (105); when the control valve (203) is closed, water sprayed from the sprayer (108) floods the heat exchange tube group (102) for soaking and cleaning.

7. The energy-saving heat exchanger for an impregnation machine according to claim 5, characterized in that: An aeration device (207) is provided at the bottom of the heat exchange tube group (102), and the aeration device (207) performs cleaning by aeration through high-pressure gas in water.

8. The energy-saving heat exchanger for an impregnation machine according to claim 5, characterized in that: A heater is provided at the bottom of the heat exchange tube group (102) to perform boiling cleaning by heating water.

9. The energy-saving heat exchanger for an impregnation machine according to claim 5, characterized in that: An ultrasonic cleaner is provided at the bottom of the heat exchange tube group (102).

Images