On-line cleaning device for heat exchanger in olefin production

Abstract

A heat exchanger online cleaning device in olefin production comprises a solvent circulating device, a thermal medium circulating device and a material circulating device, the thermal medium circulating device and the material circulating device are connected with the solvent circulating device, the solvent circulating device comprises a solvent tank, a first circulating cleaning pipeline is arranged on one side of the bottom of the solvent tank, and a circulating cleaning pump is arranged on the first circulating cleaning pipeline. The other end of the first circulating cleaning pipeline is communicated with one end of a first communication pipeline, one end of the first communication pipeline is connected with one side of the bottom of the heat exchanger, a second communication pipeline is arranged on one side of the top of the heat exchanger, one end of the second communication pipeline is connected with a second circulating cleaning pipeline, and the other end of the second circulating cleaning pipeline is connected with a solvent tank; the device can shorten the cleaning time of the heat exchanger and reduce the influence on the production load of the device; offline cleaning frequency of the heat exchanger is reduced, manual workload is reduced, and production efficiency is improved; the steam consumption and the production cost are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment cleaning, in particular to an on-line cleaning device for a heat exchanger in olefin production. Background Art

[0002] In the petrochemical production process, the reboiler of the distillation tower of the olefin separation unit is often clogged with wax oil and dirt, which affects the heat exchange efficiency of the heat exchanger. At present, the heat exchanger needs to be cut off and mechanically cleaned for cleaning. During the cleaning process, the production load needs to be reduced to maintain the normal operation of the system. The offline mechanical cleaning of the heat exchanger takes a long time to affect the processing load, and the workload of disassembling and assembling the head of the heat exchanger is large, which affects the work efficiency. In addition, the auxiliary steam reboiler needs to be used in the offline cleaning, which increases the steam consumption and causes the increase of energy consumption.

[0003] Therefore, there is an urgent need for an online cleaning device for heat exchangers in olefin production to shorten the cleaning time of the heat exchanger and reduce the impact on the production load of the device; reduce the frequency of offline cleaning of the heat exchanger, reduce manual workload, and improve production efficiency; reduce steam consumption and reduce production costs. Summary of the invention

[0004] An online cleaning device for a heat exchanger in olefin production shortens the cleaning time of the heat exchanger and reduces the impact on the production load of the device; reduces the frequency of offline cleaning of the heat exchanger, reduces manual workload, and improves production efficiency; reduces steam consumption and reduces production costs.

[0005] An online cleaning device for a heat exchanger in olefin production comprises a solvent circulation device and a heat medium circulation device and a material circulation device connected thereto, wherein:

[0006] The solvent circulation device comprises a solvent tank, a first circulation cleaning pipeline is provided on one side of the bottom of the solvent tank, a circulation cleaning pump is provided on the first circulation cleaning pipeline, the other end of the first circulation cleaning pipeline is connected to a point of the first connecting pipeline, one end of the first connecting pipeline is connected to one side of the bottom of the heat exchanger, a second connecting pipeline is provided on one side of the top of the heat exchanger, a point of the second connecting pipeline is connected to a second circulation cleaning pipeline, and the other end of the second circulation cleaning pipeline is connected to the solvent tank;

[0007] The heat exchange medium circulation device comprises a heat exchange medium delivery port, the heat exchange medium delivery port is connected to a heat exchange medium input pipeline, the other end of the heat exchange medium input pipeline is connected to a point of the second connecting pipeline, the first point of the first connecting pipeline is connected to a heat exchange medium output pipeline, the other end of the heat exchange medium output pipeline is connected to the heat exchange medium output port;

[0008] The material circulation device comprises a material input port, which is connected to a material input pipeline, the other end of which is connected to the bottom side of the heat exchanger, the top side of the heat exchanger is connected to a material output pipeline, and the other end of which is connected to the material outlet of the propylene tower kettle.

[0009] Preferably, the solvent tank is equipped with a motor.

[0010] Preferably, flange connectors are provided at the connection between the first circulating cleaning pipeline and the first connecting pipeline, the connection between the second connecting pipeline and the second circulating cleaning pipeline, the connection between the heat exchange medium input pipeline and the second connecting pipeline, and the connection between the first connecting pipeline and the heat exchange medium output pipeline.

[0011] Preferably, a set of flow control valves are provided on both sides of the circulating cleaning pump.

[0012] Preferably, a plurality of pipeline valves are provided on the first circulation cleaning pipeline, the second circulation cleaning pipeline, the heat exchange medium input pipeline and the heat exchange medium output pipeline.

[0013] Preferably, the first circulation cleaning pipeline, the second circulation cleaning pipeline, the heat exchange medium input pipeline, the heat exchange medium output pipeline, the material input pipeline and the material output pipeline are all seamless steel pipes.

[0014] Beneficial effects of the utility model: By setting up the entire system, the cleaning efficiency of the device is improved. The online cleaning device can regularly clean the dirt and scale inside the heat exchanger, maintain the heat conduction efficiency of the heat exchanger, reduce thermal resistance, improve heat exchange efficiency, and thus improve production efficiency. In addition, the online cleaning device can timely remove dirt and scale without cutting the heat exchanger off-line for mechanical cleaning, reduce equipment damage, extend the service life of the heat exchanger, and reduce equipment maintenance and replacement costs. Scale and scale in the heat exchanger may cause problems such as hot spot concentration and excessive temperature, increasing the safety risk of the equipment. Regularly use the online cleaning device to clean the heat exchanger, reduce safety hazards, improve the safety of the production process, and regularly clean the heat exchanger to maintain its good heat exchange effect, thereby reducing energy waste and improving energy utilization efficiency. The connecting pipeline of this device is made of seamless steel pipe material, which makes the device wear-resistant and highly resistant to damage, greatly enhancing its practical value in ensuring the continuity of production, improving equipment utilization and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a schematic diagram of an online cleaning device for a heat exchanger in olefin production.

[0016] In the figure: solvent circulation device 100, solvent tank 101, first circulation cleaning pipeline 102, first connecting pipeline 103, heat exchanger 104, second connecting pipeline 105, second circulation cleaning pipeline 106, motor 107, circulation cleaning pump 108, flow control valve 109;

[0017] Heat exchange medium circulation device 200, heat exchange medium delivery port 201, heat exchange medium input pipeline 202, heat exchange medium output pipeline 203, heat exchange medium output port 204;

[0018] Material circulation device 300, material input port 301, material input pipeline 302, material output pipeline 303, propylene tower kettle material outlet 304. DETAILED DESCRIPTION

[0019] In order to make the technical solution of the present utility model easier to understand, the technical solution of the present utility model is now clearly and completely described in the form of specific embodiments in combination with the accompanying drawings.

[0020] Embodiment 1:

[0021] like Figure 1 As shown, in this embodiment Figure 1 The utility model discloses an online cleaning device for heat exchangers in olefin production, comprising a solvent circulation device 100 and a heat medium circulation device 200 and a material circulation device 300 connected thereto, wherein:

[0022] The solvent circulation device 100 includes a solvent tank 101, a first circulation cleaning pipeline 102 is provided at one side of the bottom of the solvent tank 101, a circulation cleaning pump 108 is provided on the first circulation cleaning pipeline 102, the other end of the first circulation cleaning pipeline 102 is connected to a first connecting pipeline 103, one end of the first connecting pipeline 103 is connected to a side of the bottom of a heat exchanger 104, a second connecting pipeline 105 is provided at one side of the top of the heat exchanger 104, a point of the second connecting pipeline 105 is connected to a second circulation cleaning pipeline 106, and the other end of the second circulation cleaning pipeline 106 is connected to the solvent tank 101;

[0023] The heat exchange medium circulation device 200 includes a heat exchange medium delivery port 201, the heat exchange medium delivery port 201 is connected to a heat exchange medium input pipeline 202, the other end of the heat exchange medium input pipeline 202 is connected to a point of the second connecting pipeline 105, a point of the first connecting pipeline 103 is connected to a heat exchange medium output pipeline 203, and the other end of the heat exchange medium output pipeline 203 is connected to a heat exchange medium output port 204;

[0024] The material circulation device 300 includes a material input port 301, and the material input port 301 is connected to a material input pipeline 302. The other end of the material input pipeline 302 is connected to the bottom side of the heat exchanger 104. The top side of the heat exchanger 104 is connected to a material output pipeline 303, and the other end of the material output pipeline 303 is connected to the material outlet 304 of the propylene tower kettle.

[0025] Embodiment 2:

[0026] like Figure 1 As shown, in this embodiment Figure 1 The utility model is an online cleaning device for heat exchangers in olefin production, wherein:

[0027] The solvent tank 101 is equipped with a motor 107 .

[0028] The connection between the first circulating cleaning pipeline 102 and the first connecting pipeline 103, the connection between the second connecting pipeline 105 and the second circulating cleaning pipeline 106, the connection between the heat exchange medium input pipeline 202 and the second connecting pipeline 105, and the connection between the first connecting pipeline 103 and the heat exchange medium output pipeline 203 are all provided with flange connectors.

[0029] A set of flow control valves 109 are provided on both sides of the circulating cleaning pump 108 .

[0030] A plurality of pipeline valves are provided on the first circulation cleaning pipeline 102 , the second circulation cleaning pipeline 106 , the heat exchange medium input pipeline 202 and the heat exchange medium output pipeline 203 .

[0031] The first circulation cleaning pipeline 102, the second circulation cleaning pipeline 106, the heat exchange medium input pipeline 202, the heat exchange medium output pipeline 203, the material input pipeline 302 and the material output pipeline 303 are all seamless steel pipes.

[0032] The device closes the pipeline valves on the heat exchange medium input pipeline 202 and the heat exchange medium output pipeline 203, empties the heat exchange medium in the heat exchanger 104, then connects the first circulation cleaning pipeline 102 with the first connecting pipeline 103 and the second circulation cleaning pipeline 106 with the second connecting pipeline 105 through the flange at the interface, adjusts the flow control valve 109 as needed, then opens the circulation cleaning pump 108 to extract the configured solvent in the solvent tank 101 to circulate and clean the heat exchanger, and after the cleaning is completed, all the cleaning liquid is discharged to the solvent tank 101 for treatment; when the device is cleaned, the material circulation device 300 can work independently without being affected, and is connected to the circulating propylene tower kettle material outlet 304 to continuously provide the propylene tower with a reboiling function.

[0033] It should be noted that the embodiments described herein are only partial embodiments of the present invention, rather than all implementations of the present invention, and the embodiments are only exemplary, and their role is only to provide a more intuitive and clear way to understand the content of the present invention, rather than to limit the technical solutions described in the present invention. Without departing from the concept of the present invention, all other implementation methods that ordinary technicians in the field can think of without creative work, and other simple replacements and various changes to the technical solutions of the present invention, all belong to the protection scope of the present invention.

Claims

1. An online cleaning device for heat exchangers in olefin production, characterized in that: The invention comprises a solvent circulation device (100) and a heat exchange medium circulation device (200) and a material circulation device (300) connected thereto, wherein: The solvent circulation device (100) comprises a solvent tank (101), a first circulation cleaning pipeline (102) is provided on one side of the bottom of the solvent tank (101), a circulation cleaning pump (108) is provided on the first circulation cleaning pipeline (102), the other end of the first circulation cleaning pipeline (102) is connected to a point of a first connecting pipeline (103), one end of the first connecting pipeline (103) is connected to a side of the bottom of a heat exchanger (104), a second connecting pipeline (105) is provided on one side of the top of the heat exchanger (104), a point of the second connecting pipeline (105) is connected to a second circulation cleaning pipeline (106), and the other end of the second circulation cleaning pipeline (106) is connected to the solvent tank (101); The heat exchange medium circulation device (200) comprises a heat exchange medium delivery port (201), the heat exchange medium delivery port (201) is connected to a heat exchange medium input pipeline (202), the other end of the heat exchange medium input pipeline (202) is connected to a point of the second connecting pipeline (105), a point of the first connecting pipeline (103) is connected to a heat exchange medium output pipeline (203), and the other end of the heat exchange medium output pipeline (203) is connected to a heat exchange medium output port (204); The material circulation device (300) comprises a material input port (301), wherein the material input port (301) is connected to a material input pipeline (302), the other end of the material input pipeline (302) is connected to a bottom side of a heat exchanger (104), the top side of the heat exchanger (104) is connected to a material output pipeline (303), and the other end of the material output pipeline (303) is connected to a material outlet (304) of a propylene tower kettle.

2. The on-line cleaning device for heat exchangers in olefin production as claimed in claim 1, characterized in that: The solvent tank (101) is equipped with a motor (107).

3. The on-line cleaning device for heat exchangers in olefin production as claimed in claim 1, characterized in that: The connection between the first circulating cleaning pipeline (102) and the first connecting pipeline (103), the connection between the second connecting pipeline (105) and the second circulating cleaning pipeline (106), the connection between the heat exchange medium input pipeline (202) and the second connecting pipeline (105), and the connection between the first connecting pipeline (103) and the heat exchange medium output pipeline (203) are all provided with flange connectors.

4. The on-line cleaning device for heat exchangers in olefin production as claimed in claim 1, characterized in that: A set of flow control valves (109) are provided on both sides of the circulating cleaning pump (108).

5. The on-line cleaning device for heat exchangers in olefin production as claimed in claim 1, characterized in that: A plurality of pipeline valves are provided on the first circulation cleaning pipeline (102), the second circulation cleaning pipeline (106), the heat exchange medium input pipeline (202) and the heat exchange medium output pipeline (203).

6. The on-line cleaning device for heat exchangers in olefin production as claimed in claim 1, characterized in that: The first circulation cleaning pipeline (102), the second circulation cleaning pipeline (106), the heat exchange medium input pipeline (202), the heat exchange medium output pipeline (203), the material input pipeline (302) and the material output pipeline (303) are all seamless steel pipes.

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