Heat exchange tube oil scraping device of flue gas heat exchange equipment

Abstract

The utility model provides a heat exchange tube oil scraping device of flue gas heat exchange equipment, which relates to the technical field of waste smoke waste heat recovery of a setting machine and comprises a casing and a flue gas channel arranged along the length direction of the casing, and the head and the tail of the flue gas channel are respectively connected with a smoke outlet of the setting machine and a purifier. A plurality of groups of heat exchange pipes are vertically arranged in the flue gas channel and are connected end to end, the head part of each heat exchange pipe is a water inlet pipe, the tail part of each heat exchange pipe is a water outlet pipe, an inlet of the water inlet pipe is connected with a heat exchange water source, the water outlet pipe is connected with a water storage tank, and a cleaning mechanism for cleaning the outer walls of the heat exchange pipes is arranged in the flue gas channel. According to the oil scraping device for the heat exchange tube of the flue gas heat exchange equipment, when the outer wall of the heat exchange tube needs to be cleaned, the spraying head is started, the scraping ring is driven to ascend and descend through the lifting assembly, so that scrapers on the scraping ring scrape the outer wall of the heat exchange tube up and down, oil stains on the heat exchange tube are scraped off, and the scraped oil stains are scoured into a sewage pool along a sewage draining exit; the outside of the heat exchange tube is kept bright and clean through regular cleaning, and the heat exchange effect is kept for a long time.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery from waste smoke of a setting machine, in particular to an oil scraping device for heat exchange tubes of a flue gas heat exchange device. Background Art

[0002] When the textile printing and dyeing setting machine is working, it needs to continuously replenish fresh air from the air inlet, and at the same time, a large amount of waste gas containing particulate matter, polyphenyl organic matter, printing and dyeing auxiliaries, VOCs, etc. will be continuously discharged from the exhaust outlet, and the temperature of the waste gas is as high as about 200°C. In order to make full use of the heat of the waste gas, the waste gas discharged from the textile printing and dyeing setting machine usually needs to be discharged into the heat recovery device.

[0003] However, since the exhaust smoke contains a large amount of oil and dust particles, a thick layer of oil will accumulate on the heat exchange tubes during the heat exchange process. Long-term accumulation is not only difficult to clean, but the heat exchange efficiency of the heat exchange tubes will also be greatly reduced. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the utility model provides an oil scraping device for heat exchange tubes of a flue gas heat exchange device, which solves the problems raised in the above-mentioned background technology.

[0006] (II) Technical solution

[0007] To achieve the above purpose, the utility model is implemented through the following technical solutions: a heat exchange tube scraping device for flue gas heat exchange equipment, comprising a casing and a flue gas channel arranged along the length direction of the casing, the head and tail of the flue gas channel are respectively connected to the smoke outlet of the shaping machine and the purifier, a plurality of groups of heat exchange tubes are vertically arranged in the flue gas channel, the plurality of groups of heat exchange tubes are connected head to tail, the head portion is a water inlet pipe, and the tail portion is a water outlet pipe, the inlet of the water inlet pipe is connected to a heat exchange water source, and the water outlet pipe is connected to a water storage tank, and a cleaning mechanism for cleaning the outer wall of the heat exchange tube is arranged in the flue gas channel.

[0008] Preferably, the cleaning mechanism includes a plurality of scraper rings and a lifting assembly. The scraper rings are arranged one by one outside the heat exchange tube, and their inner diameters are slightly larger than the outer diameter of the heat exchange tube. The scraper rings are fixed together by connecting rods, and the lifting assembly is used to drive the scraper rings to rise and fall.

[0009] Preferably, the lifting assembly includes a lead screw, a guide rod, a lifting block and a motor, the lead screw and the guide rod are vertically arranged in the smoke channel, the lifting block is provided with a screw hole adapted to the lead screw and a guide hole adapted to the guide rod, the scraper ring is connected to the lifting block, and the motor is arranged at the top of the smoke channel and coaxially connected to the lead screw.

[0010] Preferably, a spray head corresponding to a plurality of scraper rings is arranged at the top of the smoke channel, and a sewage outlet for sewage discharge is arranged at the bottom of the smoke channel.

[0011] Preferably, cleaning doors are provided at equal intervals on the sides of the casing along the length direction of the smoke passage.

[0012] Preferably, two adjacent groups of heat exchange tubes are connected via a U-shaped elbow.

[0013] Preferably, a circle of scrapers inclined toward the outer wall of the heat exchange tube is provided at the bottom of the scraper ring.

[0014] (III) Beneficial effects

[0015] The utility model provides a heat exchange tube oil scraping device for flue gas heat exchange equipment. It has the following beneficial effects:

[0016] 1. The heat exchange tube oil scraping device of the flue gas heat exchange equipment, when it is necessary to clean the outer wall of the heat exchange tube, open the spray head, drive the scraper ring to rise and fall through the lifting component, so that the scraper on the scraper ring scrapes up and down the outer wall of the heat exchange tube to scrape off the oil stains on the heat exchange tube, and the scraped oil stains are washed into the sewage pool along the sewage outlet. Regular cleaning can keep the outside of the heat exchange tube smooth and maintain the heat exchange effect for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an external axonometric view of the casing of the utility model;

[0018] Figure 2 This is a schematic diagram of the interior of the smoke channel of the utility model.

[0019] In the figure: 1 casing, 2 flue gas channel, 3 heat exchange tube, 4 water inlet pipe, 5 water outlet pipe, 6 U-shaped elbow, 7 cleaning mechanism, 71 scraper ring, 72 lead screw, 73 guide rod, 74 lifting block, 75 motor. DETAILED DESCRIPTION

[0020] The utility model provides a heat exchange tube oil scraping device for flue gas heat exchange equipment, such as Figure 1-2 As shown, it includes a casing 1 and a smoke channel 2 arranged along the length direction of the casing 1. The head and tail of the smoke channel 2 are respectively connected to the smoke outlet of the shaping machine and the purifier. The purifier is an existing electrostatic dust removal purifier, which will not be described in detail.

[0021] A plurality of groups of heat exchange tubes 3 are vertically arranged in the flue gas channel 2, each group is composed of a plurality of heat exchange tubes 3 arranged at intervals, and the plurality of groups of heat exchange tubes 3 are connected head to tail, wherein the head is a water inlet pipe 4 and the tail is a water outlet pipe 5, the inlet of the water inlet pipe 4 is connected to a heat exchange water source, and the water outlet pipe 5 is connected to a water storage tank, and two adjacent groups of heat exchange tubes 3 are connected by a U-shaped elbow pipe 6, such as Figure 2As shown, the tops of the first group of heat exchange tubes 3 and the second group of heat exchange tubes 3 are connected end to end through a U-shaped elbow 6, the bottoms of the second group of heat exchange tubes 3 and the third group of heat exchange tubes 3 are connected end to end through a U-shaped elbow 6, and the tops of the third group of heat exchange tubes 3 and the fourth group of heat exchange tubes 3 are connected end to end through a U-shaped elbow 6. The water passing through several groups of heat exchange tubes 3 is bent in a serpentine shape, so that the formation is increased, thereby improving the heat exchange effect between the flue gas and water in the flue gas channel 2.

[0022] A cleaning mechanism 7 for cleaning the outer wall of the heat exchange tube 3 is arranged in the flue gas channel 2 .

[0023] like Figure 2 As shown, the cleaning mechanism 7 includes a plurality of scraper rings 71 and a lifting assembly. The scraper rings 71 are arranged one by one outside the heat exchange tube 3, and their inner diameters are slightly larger than the outer diameter of the heat exchange tube 3. The scraper rings 71 are fixed together by connecting rods, and the lifting assembly is used to drive the scraper rings 71 to rise and fall.

[0024] In order to improve the cleaning effect, a circle of scrapers inclined toward the outer wall of the heat exchange tube 3 is provided at the bottom of the scraper ring 71. The scraper can more easily scrape off the oil stains on the outer wall of the heat exchange tube 3. The top of the flue gas channel 2 is provided with a spray head corresponding to a plurality of scraper rings 71, and the spray head is connected to a water source through a water pump. A sewage outlet for sewage discharge is provided at the bottom of the flue gas channel 2. The sewage outlet is connected to a sewage pool through a sewage pipe.

[0025] When it is necessary to clean the outer wall of the heat exchange tube 3, the spray head is turned on, and the scraper ring 71 is driven up and down by the lifting assembly, so that the scraper on the scraper ring 71 scrapes up and down the outer wall of the heat exchange tube 3 to scrape off the oil stains on the heat exchange tube 3. The scraped oil stains are flushed into the sewage pool along the sewage outlet. Regular cleaning can keep the outside of the heat exchange tube 3 smooth and maintain the heat exchange effect for a long time.

[0026] like Figure 2 As shown, the lifting assembly includes a lead screw 72, a guide rod 73, a lifting block 74 and a motor 75. The lead screw 72 is vertically pivoted in the smoke channel 2, the guide rod 73 is vertically arranged in the smoke channel 2, the lifting block 74 is provided with a screw hole adapted to the lead screw 72 and a guide hole adapted to the guide rod 73, the scraper ring 71 is connected to the lifting block 74, and the motor 75 is arranged at the top of the smoke channel 2 and is coaxially connected to the lead screw 72. When the motor 75 drives the lead screw 72 to rotate, it can drive the lifting block 74 to rise and fall vertically along the guide rod 73.

[0027] In order to prevent oil stains from being blocked at the bottom of the smoke passage 2, cleaning doors are provided at equal intervals on the side of the casing 1 along the length direction of the smoke passage 2. The cleaning doors are hinged, snap-fitted or fixed with bolts.

[0028] 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. An oil scraping device for heat exchange tubes of a flue gas heat exchange device, comprising a casing (1) and a flue gas passage (2) arranged along the length direction of the casing (1), wherein the head and tail of the flue gas passage (2) are respectively connected to a smoke outlet of a setting machine and a purifier, and characterized in that: A plurality of groups of heat exchange tubes (3) are vertically arranged in the flue gas channel (2). The plurality of groups of heat exchange tubes (3) are connected end to end, with the head portion being a water inlet pipe (4) and the tail portion being a water outlet pipe (5). The inlet of the water inlet pipe (4) is connected to a heat exchange water source, and the water outlet pipe (5) is connected to a water storage tank. A cleaning mechanism (7) for cleaning the outer wall of the heat exchange tube (3) is arranged in the flue gas channel (2).

2. The heat exchange tube oil scraping device of the flue gas heat exchange equipment according to claim 1, characterized in that: The cleaning mechanism (7) comprises a plurality of scraper rings (71) and a lifting assembly. The plurality of scraper rings (71) are arranged one by one outside the heat exchange tube (3) and have an inner diameter slightly larger than the outer diameter of the heat exchange tube (3). The plurality of scraper rings (71) are fixed together by connecting rods. The lifting assembly is used to drive the plurality of scraper rings (71) to move up and down.

3. The heat exchange tube oil scraping device of the flue gas heat exchange equipment according to claim 2, characterized in that: The lifting assembly comprises a lead screw (72), a guide rod (73), a lifting block (74) and a motor (75); the lead screw (72) and the guide rod (73) are both vertically arranged in the smoke passage (2); the lifting block (74) is provided with a screw hole adapted to the lead screw (72) and a guide hole adapted to the guide rod (73); the scraper ring (71) is connected to the lifting block (74); and the motor (75) is arranged at the top of the smoke passage (2) and is coaxially connected to the lead screw (72).

4. The heat exchange tube oil scraping device of the flue gas heat exchange equipment according to claim 2, characterized in that: A spray head corresponding to a plurality of scraper rings (71) is arranged at the top of the smoke channel (2), and a sewage outlet for sewage discharge is arranged at the bottom of the smoke channel (2).

5. The heat exchange tube oil scraping device of the flue gas heat exchange equipment according to claim 2, characterized in that: Cleaning doors are arranged at equal intervals on the side of the casing (1) along the length direction of the smoke passage (2).

6. The heat exchange tube oil scraping device of the flue gas heat exchange equipment according to claim 1, characterized in that: Two adjacent groups of heat exchange tubes (3) are connected via a U-shaped elbow (6).

7. The heat exchange tube oil scraping device of the flue gas heat exchange equipment according to claim 2, characterized in that: The bottom of the scraper ring (71) is provided with a circle of scrapers inclined towards the outer wall of the heat exchange tube (3).

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