Heat exchange plate self-cleaning mechanism of waste heat recovery device of setting machine

Abstract

The utility model provides a heat exchange plate self-cleaning mechanism of a waste heat recovery device of a setting machine, which relates to the technical field of waste smoke waste heat recovery and comprises a shell, a heat exchange channel, a precipitation cavity and a waste smoke channel are respectively arranged in the shell from top to bottom, and the tail of the waste smoke channel is connected with the heat exchange channel through a bent pipe. The head part of the waste smoke channel and the tail part of the heat exchange channel are respectively a waste smoke inlet end and a waste smoke outlet end, the bottom of the heat exchange channel is communicated with the precipitation cavity, a plurality of hollow heat exchange plates are longitudinally arranged in the heat exchange channel, and the head end and the tail end of each heat exchange plate are respectively provided with a water inlet pipe and a water outlet pipe; and a cleaning mechanism for cleaning the heat exchange plate is arranged at the top in the shell. According to the heat exchange plate self-cleaning mechanism of the waste heat recovery device of the setting machine, spraying is started during cleaning, every two cleaning rollers correspond to the two sides of one heat exchange plate, and when the movable frame drives the gears to advance in the direction of the heat exchange plates, the gears can rotate on the racks in a meshed mode, so that the cleaning rollers are driven to synchronously rotate to clean the side faces of the heat exchange plates; and regular cleaning can prevent a large amount of oil dirt from being accumulated on the surface of the heat exchange plate, so that the heat exchange plate keeps high heat exchange efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery from waste smoke, in particular to a self-cleaning mechanism for a heat exchange plate of a waste heat recovery device for a setting machine. Background Art

[0002] The exhaust gas emitted by the setting machine in the printing and dyeing industry is a high-temperature hot gas with a temperature of about 180°C. The exhaust gas contains various harmful components such as oil smoke, dust and fabric fibers. If the exhaust gas is directly discharged into the atmosphere, it is neither environmentally friendly nor energy-saving. Therefore, the exhaust gas of the setting machine is now required to meet the emission standards to save energy and reduce environmental pollution.

[0003] In order to improve economic benefits, some large printing and dyeing enterprises have recovered the waste heat of the existing setting machine. The existing waste heat recovery equipment exchanges heat through heat exchange tubes. Since water passes through the tubes quickly, water cannot fully absorb the heat energy of high-temperature waste gas. The temperature of the waste gas after heat recovery is still high, around 70°C, and waste heat is still wasted. Secondly, due to the large amount of oil and particles in the waste gas, long-term heat exchange will cause thick dust and oil to accumulate on the heat exchange tubes, and the accumulation of dust and oil will affect the heat exchange effect. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a self-cleaning mechanism for a heat exchange plate of a waste heat recovery device of a setting machine, which solves the problems raised in the above-mentioned background technology.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the utility model is implemented through the following technical solutions: a self-cleaning mechanism for a heat exchange plate of a waste heat recovery device of a stenting machine, comprising a shell, in which a heat exchange channel, a sedimentation chamber and a waste smoke channel are respectively arranged from top to bottom, the tail of the waste smoke channel is connected to the heat exchange channel through a bend pipe, the head of the waste smoke channel and the tail of the heat exchange channel are respectively the waste smoke inlet and outlet ends, the bottom of the heat exchange channel is connected to the sedimentation chamber, a plurality of hollow heat exchange plates are longitudinally arranged in the heat exchange channel, the head and tail ends of the heat exchange plate are respectively provided with a water inlet pipe and a drain pipe, and a cleaning mechanism for cleaning the heat exchange plate is provided at the top of the shell.

[0008] Preferably, the cleaning mechanism includes a movable frame, a lead screw, a guide rod, a motor and several groups of racks, gears and cleaning rollers. The lead screw and guide rod are arranged along the length direction of the heat exchange plate. The movable frame is sleeved with the lead screw and guide rod through screw holes and guide holes. The motor is arranged in a shell and connected to the lead screw. The rack is arranged along the length direction of the heat exchange plate and corresponds to the heat exchange plate one by one. The gear is pivotally connected to the movable frame and meshes with the rack. The cleaning roller is coaxially arranged under the gear and corresponds to the side of the heat exchange plate.

[0009] Preferably, a bearing seat is provided at the bottom of the gear, the top rotating shaft of the cleaning roller is rotatably connected to the bearing seat, and the bearing seat is provided with a motor for driving the cleaning roller to rotate.

[0010] Preferably, the heat exchange plate is formed by two plates welded around the four sides, the two plates are connected by dense welding points, and guide welding rods are alternately arranged up and down in the two plates along the steam direction, and the guide welding rods separate the channels in the heat exchange plate into a serpentine shape.

[0011] Preferably, the drain pipe is sequentially connected to a solenoid valve and a secondary heater, and the secondary heater is an electric heater or a boiler heater.

[0012] Preferably, a sewage cleaning port is provided on the side of the sedimentation chamber.

[0013] (III) Beneficial effects

[0014] The utility model provides a self-cleaning mechanism for a heat exchange plate of a residual heat recovery device of a setting machine. It has the following beneficial effects:

[0015] 1. The heat exchange plate self-cleaning mechanism of the waste heat recovery device of the setting machine starts spraying during cleaning. Every two cleaning rollers correspond to the two sides of a heat exchange plate. When the moving frame drives the gear to move along the direction of the heat exchange plate, the gear will mesh and rotate on the rack, thereby driving the cleaning roller to rotate synchronously to clean the side of the heat exchange plate. Regular cleaning can prevent a large amount of oil from accumulating on the surface of the heat exchange plate, so that the heat exchange plate maintains a high heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an axonometric drawing of the utility model;

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

[0018] Figure 3 This is a schematic diagram of the heat exchange plate structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the connection between the cleaning roller and the gear of the utility model.

[0020] In the figure: 1 shell, 2 heat exchange channel, 3 heat exchange plate, 4 cleaning mechanism, 5 waste smoke channel, 6 sedimentation chamber, 7 cleaning port, 8 water inlet pipe, 9 drain pipe, 10 solenoid valve, 11 secondary heater, 31 plate body, 32 welding point, 33 guide welding rod, 41 rack, 42 ​​gear, 43 cleaning roller, 44 moving frame, 45 lead screw, 46 guide rod, 47 motor, 48 bearing seat. DETAILED DESCRIPTION

[0021] The utility model embodiment provides a heat exchange plate self-cleaning mechanism of a residual heat recovery device of a setting machine, such as Figure 1-4 As shown, it includes a shell 1, which is in a rectangular shape. A heat exchange channel 2, a sedimentation chamber 6 and a waste smoke channel 5 are respectively arranged in the shell 1 from top to bottom.

[0022] Several shell sections 1 can be connected end to end. The tail of the waste smoke channel 5 on the last shell section 1 is connected to the heat exchange channel 2 through a bend. The head of the first waste smoke channel 5 and the tail of the first heat exchange channel 2 are the waste smoke inlet and outlet, respectively, which are connected to the exhaust port and purifier of the setting machine. The bottom of the heat exchange channel 2 is connected to the sedimentation chamber 6. The side of the sedimentation chamber 6 is provided with a cleaning port 7. The oil and dirt dropped from the heat exchange channel 2 are accumulated in the sedimentation chamber 6 and are regularly cleaned through the cleaning port 7. The top of the shell 1 is covered by a heat preservation cover.

[0023] Several spray pipes are arranged on the insulation cover in the shell 1, and several nozzles aimed at the heat exchange plate 3 are arranged on the spray pipes. The water inlet end of the spray pipe is connected to the water source through a water pump, and the nozzle is used to provide water for cleaning the heat exchange plate 3.

[0024] like Figure 3 As shown, a plurality of heat exchange plates 3 with hollow interiors are arranged longitudinally in the heat exchange channel 2, and a water inlet pipe 8 and a drain pipe 9 are respectively provided at the head and tail ends of the heat exchange plates 3.

[0025] like Figure 3 As shown, the heat exchange plate 3 is formed by welding two plate bodies 31 along the four sides. As a preferred solution, the material of the metal plate is copper or stainless steel. In the initial state, the two plate bodies 31 are attached to each other, and then connected by dense welding points 32 between the two plate bodies 31. Then the drain pipe 9 is closed, and high-pressure nitrogen is introduced into the water inlet pipe 8, so that the areas without welding points 32 in the two plate bodies 31 expand outward and form a steam passage. On the steam passage in the two plate bodies 31, guide welding rods 33 are alternately arranged up and down along the steam direction, and the guide welding rods 33 separate the channel in the heat exchange plate 3 into a serpentine shape. The water or steam in the steam passage is made to travel longer and slower, which helps to improve the heat exchange effect.

[0026] Since the temperature of the clean water after absorbing heat is only 70-100°C, in order to make it reusable by the setting machine, it needs to be heated to above 150°C and the corresponding steam pressure. The drain pipe 9 is connected with a solenoid valve 10 and a secondary heater 11 in sequence. The secondary heater 11 is an electric heater or a boiler heater. The electric heater is an electric heating wire, both of which are existing commercially available products.

[0027] A cleaning mechanism 4 for cleaning the heat exchange plate 3 is provided at the top of the housing 1. The cleaning mechanism 4 is located below the spray pipe.

[0028] like Figure 2 As shown, the cleaning mechanism 4 includes a moving frame 44, a lead screw 45, a guide rod 46, a motor 47 and a plurality of racks 41, gears 42 and cleaning rollers 43. The lead screw 45 and the guide rod 46 are arranged along the length direction of the heat exchange plate 3. Both ends of the lead screw 45 are rotatably connected to the shell 1 through bearings. The moving frame 44 is sleeved with the lead screw 45 and the guide rod 46 through screw holes and guide holes. The motor 47 is arranged in the shell 1 and connected to the lead screw 45. When the motor 47 drives the lead screw 45 to rotate, it can drive the moving frame 44 to move in the length direction of the heat exchange plate 3.

[0029] The racks 41 are arranged along the length direction of the heat exchange plate 3 and correspond to the heat exchange plate 3 one by one. The number of racks 41 is preferably twice that of the heat exchange plate 3. Every two racks 41 correspond to one heat exchange plate 3. The gear 42 is pivotally connected to the moving frame 44 and meshes with the rack 41. The cleaning roller 43 is coaxially arranged under the gear 42 and corresponds to the side of the heat exchange plate 3. Every two cleaning rollers 32 correspond to the two sides of a heat exchange plate 3. When the moving frame 44 drives the gear 42 to move along the direction of the heat exchange plate 3, the gear 42 will mesh and rotate on the rack 41, thereby driving the cleaning roller 43 to rotate synchronously to clean the side of the heat exchange plate 3.

[0030] In order to prevent the cleaning roller 43 from blocking the airflow of waste smoke during the heat exchange process, a bearing seat 48 is provided at the bottom of the gear 42, and the top rotating shaft of the cleaning roller 43 is rotatably connected to the bearing seat 48. The bearing seat 48 is provided with a motor for driving the cleaning roller 43 to rotate. When the cleaning roller 43 returns to the initial position after cleaning, the motor drives the cleaning roller 43 to fold upward 90° along the parallel direction of the heat exchange plate 3, so that it is parallel to the length direction of the heat exchange plate 3, thereby reducing the resistance to the airflow.

[0031] 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 heat exchange plate self-cleaning mechanism of a waste heat recovery device of a setting machine, comprising a shell (1), wherein a heat exchange channel (2), a sedimentation chamber (6) and a waste smoke channel (5) are respectively arranged in the shell (1) from top to bottom, the tail of the waste smoke channel (5) is connected to the heat exchange channel (2) through a bend, the head of the waste smoke channel (5) and the tail of the heat exchange channel (2) are respectively the waste smoke inlet end and the exhaust end, and the bottom of the heat exchange channel (2) is connected to the sedimentation chamber (6), characterized in that: A plurality of heat exchange plates (3) with hollow interiors are arranged longitudinally in the heat exchange channel (2); a water inlet pipe (8) and a drain pipe (9) are respectively arranged at the head and tail ends of the heat exchange plates (3); and a cleaning mechanism (4) for cleaning the heat exchange plates (3) is arranged at the top of the shell (1).

2. The heat exchange plate self-cleaning mechanism of the residual heat recovery device of the setting machine according to claim 1 is characterized by: The cleaning mechanism (4) comprises a movable frame (44), a lead screw (45), a guide rod (46), a motor (47), and a plurality of racks (41), a gear (42), and a cleaning roller (43). The lead screw (45) and the guide rod (46) are arranged along the length direction of the heat exchange plate (3). The movable frame (44) is sleeved and matched with the lead screw (45) and the guide rod (46) through screw holes and guide holes. The motor (47) is arranged in the housing (1) and connected to the lead screw (45). The rack (41) is arranged along the length direction of the heat exchange plate (3) and corresponds to the heat exchange plate (3) one by one. The gear (42) is pivotally connected to the movable frame (44) and meshes with the rack (41). The cleaning roller (43) is coaxially arranged under the gear (42) and corresponds to the side of the heat exchange plate (3).

3. The heat exchange plate self-cleaning mechanism of the residual heat recovery device of the setting machine according to claim 2 is characterized by: A bearing seat (48) is arranged at the bottom of the gear (42), and the top rotating shaft of the cleaning roller (43) is rotatably connected to the bearing seat (48). The bearing seat (48) is provided with a motor for driving the cleaning roller (43) to rotate.

4. The heat exchange plate self-cleaning mechanism of the residual heat recovery device of the setting machine according to claim 1 is characterized by: The heat exchange plate (3) is formed by welding two plate bodies (31) along the four sides. The two plate bodies (31) are connected by dense welding points (32). Guide welding rods (33) are alternately arranged up and down along the steam flow direction in the two plate bodies (31). The guide welding rods (33) separate the channels in the heat exchange plate (3) into a serpentine shape.

5. The heat exchange plate self-cleaning mechanism of the residual heat recovery device of the setting machine according to claim 1 is characterized by: The drainage pipe (9) is sequentially connected to a solenoid valve (10) and a secondary heater (11), and the secondary heater (11) is an electric heater or a boiler heater.

6. The heat exchange plate self-cleaning mechanism of the residual heat recovery device of the setting machine according to claim 1 is characterized by: A sewage cleaning port (7) is provided on the side of the sedimentation chamber (6).

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