Rapid low-resistance repair device for internal leakage of heat exchanger

Abstract

The utility model discloses a rapid low-resistance repairing device for internal leakage of a heat exchanger, which comprises the heat exchanger, an upper pattern plate and a lower pattern plate are respectively arranged at two ends of the heat exchanger, a plurality of row pipes are arranged in the heat exchanger, and two ends of the row pipes are respectively arranged on the upper pattern plate and the lower pattern plate in a penetrating manner; the leaking stoppage inner sleeve is arranged on any damaged calandria in the heat exchanger, and the outer diameter of the leaking stoppage inner sleeve is smaller than the inner diameter of the calandria. The leaking stoppage inner sleeve has the advantages that the leaking stoppage inner sleeve is tightly combined with the calandria, effective sealing of the damaged perforated calandria can be achieved, the quick low-resistance leaking stoppage effect of a heat exchanger is achieved, and the perforated condition of the calandria can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a fast low-resistance repair device for internal leakage of a heat exchanger. Background Art

[0002] In the sulfuric acid production process, the conversion section is where sulfur dioxide is oxidized to sulfur trioxide at a certain temperature (about 450°C) in the presence of a vanadium pentoxide catalyst. The oxidation process is an exothermic reaction, so a large amount of heat is generated during normal production. Heat exchange is required through a heat exchanger to transfer the heat inside the converter to the raw material, low-temperature process gas one, through the high-temperature process gas two. The process gas one is continuously heated to about 450°C during the heat exchange process, and the temperature inside the converter is also controlled below 600°C, thereby maintaining the catalyst activity and maximizing the conversion efficiency to achieve the goal of efficient production.

[0003] The conversion system works uninterruptedly under high-temperature acidic gas, but the purification and de-dusting effects such as 100% dust removal and demisting cannot be achieved in the previous purification and drying links. Especially when the process indicators are not well controlled, more dust and acid mist are brought into the conversion section. Therefore, the dust and acid mist in the raw material process gas entering the conversion system will continue to accumulate at the bottom of the heat exchanger shell, forming corrosive media such as acid mud, which corrodes the carbon steel pipe in the heat exchanger. Over time, corrosion perforation will occur, resulting in cross-flow and convection, affecting production control and the absorption efficiency of the back section, causing environmental pollution, etc., and the corrosion perforation of the pipe group will appear in multiple pieces. Therefore, after the corrosion perforation inside the heat exchanger, it is necessary to repair or replace it in time. The current conventional leak repair method is to find the corroded and damaged pipe and seal it at the upper and lower flower plates to cancel the damaged pipe group, but it will reduce the heat exchange area, affect the heat exchange effect, and increase the gas resistance and energy consumption. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a fast low-resistance repair device for internal leakage of a heat exchanger, which can perform fast low-resistance repair on the corrosion and perforation of the internal pipes of the heat exchanger.

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

[0006] A heat exchanger internal leakage rapid low resistance repair device, comprising:

[0007] A heat exchanger, wherein an upper plate and a lower plate are respectively arranged at both ends of the heat exchanger, and a plurality of rows of pipes are arranged inside the heat exchanger, and both ends of the rows of pipes are respectively installed on the upper plate and the lower plate;

[0008] A leak-proof inner sleeve is arranged on any perforated portion of the heat exchanger that damages the row pipe, wherein the outer diameter of the leak-proof inner sleeve is smaller than the inner diameter of the row pipe.

[0009] Furthermore, it also includes a sealing layer, which is arranged on the lower flower plate.

[0010] Furthermore, an upper air chamber and a lower air chamber are respectively provided on the upper flower plate and the lower flower plate.

[0011] Furthermore, the upper air chamber and the lower air chamber are respectively provided with an inspection hole.

[0012] Furthermore, the leak-proof inner sleeve has a length of 300 mm to 500 mm, a thickness of 2.0 mm to 2.5 mm, and an outer surface thereof is completely coated with a layer of water glass.

[0013] Furthermore, a sealing hole is provided on the outer shell of the heat exchanger and is located above the perforated portion of the damaged row pipe.

[0014] Furthermore, a sealing hole is provided on the outer shell of the heat exchanger and is located 50 mm to 100 mm above the perforated portion of the damaged row pipe.

[0015] Furthermore, guide plates are evenly arranged in the inner shell layer of the heat exchanger.

[0016] Furthermore, expansion joints are respectively provided on both sides of the shell of the heat exchanger.

[0017] The beneficial effects of the utility model: through the close combination of the leak-plugging inner sleeve and the drain pipe, effective sealing of the damaged and perforated drain pipe can be achieved, which plays a role in rapid and low-resistance leak-plugging of the heat exchanger, so that the drain pipe perforation problem can be solved; at the same time, the selected leak-plugging inner sleeve has little effect on the inner diameter of the original drain pipe, does not affect the gas circulation, and basically does not cause changes in the system resistance. It can effectively and quickly solve the internal leakage of the heat exchanger, especially when multiple drain pipes are damaged. The advantage is more obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the principle structure of a device for quickly repairing internal leakage of a heat exchanger with low resistance;

[0019] Figure 2 for Figure 1 A partial enlarged view of middle A.

[0020] The markings in the figure are as follows: 1-drain pipe; 2-guide plate; 3-inspection hole; 4-expansion joint; 5-leakage plugging inner sleeve; 6-sealing layer; 7-lower flower plate; 8, upper flower plate. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model clearer and more specific, the content of the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the utility model, rather than to limit the utility model. It should also be noted that, for the convenience of description, only the parts related to the utility model are shown in the accompanying drawings, rather than all the contents.

[0022] like Figure 1 to Figure 2 As shown, the utility model provides a heat exchanger internal leakage fast low resistance repair device, comprising:

[0023] The heat exchanger has an upper plate 8 and a lower plate 7 at both ends thereof, and a plurality of rows of tubes 1 are arranged in the heat exchanger, and the two ends of the rows of tubes 1 are respectively installed on the upper plate 8 and the lower plate 7;

[0024] The plugging inner sleeve 5 has an outer diameter smaller than the inner diameter of the row pipe 1, ensuring the combination of the plugging inner sleeve 5 and the row pipe 1; the plugging inner sleeve 5 is arranged on the perforated portion of any damaged row pipe 1 in the heat exchanger. Specifically, the plugging inner sleeve 5 is pushed into the bottom of the damaged row pipe from the lower air chamber of the heat exchanger, and a jack and a bracket are used as thrust support to ensure that the lower end of the plugging inner sleeve 5 is flush with the end of the damaged row pipe, and then full welding is performed in the lower air chamber to achieve effective sealing of the damaged perforated row pipe.

[0025] Among them, through the close combination of the plugging inner sleeve and the row pipe, the damaged and perforated row pipe can be effectively sealed, which has the effect of rapid and low-resistance plugging of the heat exchanger, so that the perforation of the row pipe 1 can be solved.

[0026] As a preferred solution of the above, it also includes a sealing layer 6, which is arranged on the lower flower plate 7, and can fill and seal the outside of the damaged pipe, and further block the damaged perforated pipe. Among them, the sealing layer can be a conventional sealing glue. Preferably, when the sealing layer 6 is solidified by mixing diabase, water glass and sodium fluorosilicate into an aqueous solution, its sealing effect is better. It can be mixed into an aqueous solution in a ratio of 1:1:0.3 and solidified into the desired sealing layer 6. Diabase has good wear resistance, corrosion resistance and pressure resistance. After combining with water glass and sodium fluorosilicate, it forms a tough and dense barrier on the lower flower plate 7 of the heat exchanger, which can effectively prevent medium leakage, thereby improving its sealing effect. The solidified sealing layer 6 also has high strength and hardness, can withstand a certain pressure and mechanical shock, and is not easy to be damaged or deformed.

[0027] As a preferred solution of the above, an upper air chamber and a lower air chamber are respectively provided on the upper flower plate 8 and the lower flower plate 7. Through the setting of the upper air chamber and the lower air chamber, the gas can be better distributed and heat-conducted, thereby improving the efficiency and speed of heat exchange; at the same time, it also ensures the sealing effect of the device, further reduces the possibility of medium leakage, and ensures the safe operation of the device.

[0028] As a preferred solution of the above, the upper air chamber and the lower air chamber are respectively provided with an inspection hole 3 to facilitate maintenance and inspection. Specifically, different working areas of the heat exchanger can be maintained and inspected through the inspection holes 5 of the upper air chamber and the lower air chamber, thereby reducing interference with the overall system and improving maintenance efficiency.

[0029] As a preferred solution of the above, the length of the plugging inner sleeve 5 is 300mm to 500mm, the thickness is 2.0mm to 2.5mm, and its outer surface is fully coated with a layer of water glass to ensure the effective combination of the plugging inner sleeve 5 and the drainage pipe 1.

[0030] As a preferred solution of the above, a sealing hole is provided on the outer shell of the heat exchanger and located above the perforated part of the damaged pipe. Preferably, a 300mm*300mm sealing hole is provided on the outer shell of the heat exchanger and located 50mm to 100mm above the perforated part of the damaged pipe, and the sealing hole allows the mixture of diabase, water glass and sodium fluorosilicate to be poured into the filling and covering of the damaged pipe, and then pushed flat to 30mm above the damaged part by self-flow and flattening with a flat steel chisel to achieve complete filling and sealing of the damaged pipe, so that it has better sealing performance; then the newly opened sealing hole of the heat exchanger is re-welded and sealed, and it can be put into normal use after being left to dry naturally for 4 hours.

[0031] As a preferred solution of the above, guide plates 2 are evenly arranged in the inner shell layer of the heat exchanger, which can extend the flow channel length of the shell-side medium, increase the flow velocity between tubes, and achieve a better cooling effect.

[0032] As a preferred solution described above, expansion joints 4 are respectively provided on both sides of the shell of the heat exchanger, which can reduce the influence of thermal stress on the heat exchanger, extend its service life and improve working efficiency.

[0033] It should be noted that due to the influence of gas flow direction, object gravity, etc., acid mud generally accumulates at the upper part of the bottom flower plate of the heat exchanger (i.e., the lower flower plate 7), thereby corroding the pipe and causing leakage, cross-flow, etc. Therefore, after finding the damaged pipe, according to the inner diameter of the pipe 1 of φ1 (generally DN65 carbon steel pipe), a plugging inner sleeve 5 with an outer diameter 1mm smaller than φ1 is customized, that is, the outer diameter of the plugging inner sleeve 5 is 1mm smaller than the inner diameter of the pipe 1, and its material is consistent with the pipe 1 of the heat exchanger. The length of the plugging inner sleeve 5 is 300mm~500mm, the thickness is 2.0mm~2.5mm, and its outer surface is fully coated with a layer of water glass. Specifically: at the lower end of the damaged pipe, push the customized plugging inner sleeve 5 coated with water glass into the pipe, and use a jack, a fixed bracket, etc. for coordinated pushing. Afterwards, a 300mm*300mm sealing hole is opened on the outer shell of the heat exchanger and located 50mm to 100mm above the perforated part of the damaged pipe. The sealing hole allows the mixture of diabase, water glass and sodium fluorosilicate to be poured into the filling and covering of the damaged pipe, and then pushed to 30mm above the damaged part by gravity and with a flat steel chisel to achieve complete filling and sealing of the damaged pipe, so that its sealing is better; finally, the newly opened sealing hole of the heat exchanger is re-welded and sealed, and it can be put into normal use after being left to dry naturally for 4 hours. Among them, the selected plugging inner sleeve 5 has little effect on the inner diameter of the original pipe, can be tightly combined with the pipe, does not affect the gas circulation, and basically does not cause changes in system resistance. After that, the outside of the damaged pipe is filled and sealed with a mixture of diabase and water glass, and the perforation is further blocked, which does not affect the heat exchange area and heat exchange efficiency. Under the condition of keeping the system resistance unchanged, the corroded perforated part inside the heat exchanger is quickly repaired and continued to be used, especially when multiple pipes are damaged. The advantage is more obvious.

[0034] The implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A rapid low-resistance repair device for internal leakage of a heat exchanger, characterized in that: include: A heat exchanger, wherein an upper plate and a lower plate are respectively arranged at both ends of the heat exchanger, and a plurality of rows of pipes are arranged inside the heat exchanger, and the two ends of the rows of pipes are respectively installed on the upper plate and the lower plate; A leak-proof inner sleeve is arranged on any perforated portion of the heat exchanger that damages the row pipe, wherein the outer diameter of the leak-proof inner sleeve is smaller than the inner diameter of the row pipe.

2. The heat exchanger internal leakage rapid low resistance repair device according to claim 1 is characterized by: It also includes a sealing layer, which is arranged on the lower flower plate.

3. The heat exchanger internal leakage rapid low resistance repair device according to claim 1 is characterized by: An upper air chamber and a lower air chamber are respectively arranged on the upper flower plate and the lower flower plate.

4. The heat exchanger internal leakage rapid low resistance repair device according to claim 3 is characterized by: The upper air chamber and the lower air chamber are respectively provided with an inspection hole.

5. The heat exchanger internal leakage rapid low resistance repair device according to claim 1, characterized in that: The length of the leak-proof inner sleeve is 300 mm to 500 mm, the thickness is 2.0 mm to 2.5 mm, and the outer surface thereof is completely coated with a layer of water glass.

6. The heat exchanger internal leakage rapid low resistance repair device according to claim 1, characterized in that: A sealing hole is provided on the shell of the heat exchanger and is located above the perforated portion of the damaged row pipe.

7. The heat exchanger internal leakage rapid low resistance repair device according to claim 6, characterized in that: A sealing hole is provided on the outer shell of the heat exchanger and is located 50 mm to 100 mm above the perforated portion of the damaged row pipe.

8. The heat exchanger internal leakage rapid low resistance repair device according to claim 1, characterized in that: Guide plates are evenly arranged in the inner shell layer of the heat exchanger.

9. The heat exchanger internal leakage rapid low resistance repair device according to claim 1, characterized in that: Expansion joints are respectively arranged on both sides of the shell of the heat exchanger.

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