Leak-proof structure for tube bundle of steam reboiler

Abstract

The utility model discloses a steam reboiler tube bundle leakproof structure in the technical field of petrochemical engineering, which comprises a temporary treatment component mounted between a reboiler and a steam condensate collecting tank, and an electric control valve is arranged at the front end of the temporary treatment component from which steam condensate flows; the temporary treatment assembly comprises a temporary steam condensate collecting tank, the top of the temporary steam condensate collecting tank is outwards connected with the torch removing system, a liquid level sensor is arranged in the tank, and the bottom of the temporary steam condensate collecting tank is connected with a sewage pool on the outer side; and the rear end of the steam condensate collecting tank is connected with the chemical water collecting device. The temporary treatment assembly is additionally arranged between the reboiler and the steam condensate collecting tank, so that the phenomenon that a pipe bundle of the reboiler slightly leaks in the chemical process is avoided, flammable gas entering a steam condensate system is reduced, flammable gas gathered at the top of the steam condensate collecting tank is reduced, and potential safety hazards are reduced; meanwhile, dissolving and mixing of organic matters are reduced through the device, and failure of a chemical water mixing bed in the chemical water collecting device is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of petrochemical industry, in particular to a steam reboiler tube bundle anti-leakage structure. Background Art

[0002] Reboilers are widely used in chemical plants. Reboilers (also called reboilers) can vaporize liquefied hydrocarbons again. They are a special heat exchanger that can exchange heat and vaporize liquids at the same time. They are often used in conjunction with distillation towers. The material expands or even vaporizes when heated in the reboiler, and its density decreases, so it leaves the vaporization space and returns smoothly to the tower.

[0003] The heat source of the reboiler is steam. In the chemical production process, there are common phenomena such as micro-leakage of the tube bundle, which causes combustible gas to enter the steam condensate system. Long-term leakage will cause combustible gas to accumulate on the top of the condensate storage tank, and eventually reach the explosion limit; at the same time, a small amount of organic matter will dissolve in the steam condensate, causing impact on the mixed bed activated carbon of the downstream steam condensate recovery device, and eventually make the chemical water mixed bed ineffective. Normally, when this happens, if there is no spare reboiler or it cannot be effectively isolated, the chemical plant needs to be shut down for maintenance.

[0004] In order to solve the above situation, the utility model proposes a steam reboiler tube bundle anti-leakage structure. Utility Model Content

[0005] The main purpose of the utility model is to overcome the deficiencies of the prior art and provide a steam reboiler tube bundle anti-leakage structure.

[0006] The utility model is implemented by the following technical scheme: a steam reboiler tube bundle anti-leakage structure, the structure of which includes a temporary treatment component installed between the reboiler and the steam condensate collection tank, and an electric control valve is provided at the front end of the steam condensate flowing to the temporary treatment component;

[0007] The temporary processing assembly comprises a temporary steam condensate collection tank, the top of which is connected to the flare removal system, a liquid level sensor is arranged inside the temporary steam condensate collection tank, and the bottom is connected to the sewage pool outside;

[0008] The rear end of the steam condensate collecting tank is connected to the chemical water collecting device.

[0009] Furthermore, a shower guide is provided on the conduit leading out of the temporary treatment component, and the electric control valve is arranged at the liquid inlet front end of the shower guide.

[0010] Furthermore, a three-way pipe is provided on the conduit leading out of the temporary treatment component, and the electric control valve is arranged at the liquid inlet front end of the three-way pipe.

[0011] Furthermore, an isolation blind plate is provided between the reboiler and the steam condensate collecting tank, and the isolation blind plate is arranged at the liquid inlet rear end of the electric control valve.

[0012] Furthermore, one end of the reboiler is connected to the T202 tower, and the other end is connected to the steam condensate collection tank.

[0013] Furthermore, the electric control valve is also provided on the pipeline connecting the temporary steam condensate collection tank and the flare removal system.

[0014] Furthermore, a liquid level valve is provided on the pipeline connecting the temporary steam condensate collection tank and the sewage pool.

[0015] Beneficial Effects

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The utility model avoids the phenomenon of micro-leakage of the tube bundle of the reboiler in the chemical process by adding a temporary processing component between the reboiler and the steam condensate collecting tank, reduces the intrusion of combustible gas into the steam condensate system, reduces the accumulation of combustible gas on the top of the steam condensate collecting tank, and reduces safety hazards; at the same time, the device reduces the dissolution and mixing of organic matter, reduces the failure of the chemical water mixed bed in the chemical water collecting device, effectively realizes isolation, and reduces the probability of needing to stop work for maintenance.

[0018] It not only effectively solves the hidden dangers of production safety, but also avoids the shutdown of downstream chemical water collection devices due to excessive TOC, and extends the long-term operation of the entire production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0021] Figure 2 for Figure 1 An enlarged structural diagram of the temporary processing component part.

[0022] In the figure: 1-T202 tower, 2-reboiler, 3-isolation blind plate, 4-electrically controlled valve, 5-steam condensate collecting tank, 6-chemical water collecting device, 7-leach guide, 8-temporary treatment component, 81 temporary steam condensate collecting tank, 82-flare removal system, 83-sewage tank. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Embodiment 1

[0025] See also Figure 1-2 The utility model provides a technical solution for the anti-leakage structure of a steam reboiler tube bundle:

[0026] This scheme is mainly used in the case where there is micro-leakage in the tube bundle of the reboiler in chemical production. It should be noted that this scheme can also be used in processes equivalent to micro-leakage in the tube bundle. If it is simply by replacing the connection of the internal components or the type of the internal solution, the scheme also belongs to the protection scope of this scheme. This scheme is specifically: a steam reboiler tube bundle anti-leakage structure, which includes a temporary treatment component 8 installed between the reboiler 2 and the steam condensate collection tank 5, and an electric control valve 4 is provided at the front end of the steam condensate flowing to the temporary treatment component 8. The specific position of the electric control valve 4 is shown in Figure 1 The guide tube 7 is provided on the conduit leading out of the temporary treatment component 8, and the electric control valve 4 is arranged at the liquid inlet front end of the guide tube 7; the guide tube 7 here can also be replaced with a three-way pipe according to the needs, so as to effectively improve the diameter of the pipe opening of the diversion, and the position of the solenoid valve 4 is also limited to: an isolation blind plate 3 is also provided between the reboiler 2 and the steam condensate collection tank 5, and the isolation blind plate 3 is arranged at the liquid inlet rear end of the electric control valve 4;

[0027] The temporary processing assembly 8 includes a temporary steam condensate collection tank 81, the top of which is connected to the flare removal system 82, a liquid level sensor is provided inside the temporary steam condensate collection tank 81, and the bottom is connected to the sewage pool 83 outside;

[0028] The rear end of the steam condensate collecting tank 5 is connected to the chemical water collecting device 6;

[0029] See Figure 1 In the whole system, one end of the reboiler 2 is connected to the T202 tower, and the other end is connected to the steam condensate collection tank 5;

[0030] In order to realize the control of the material discharged from the temporary steam condensate collection tank 81, the following are respectively set up: the electric control valve 4 is also provided on the pipeline connecting the temporary steam condensate collection tank 81 and the flare removal system 82, so as to control the combustible gas retained on the tank top and reduce the safety hazard in the process; the liquid level valve is provided on the pipeline connecting the temporary steam condensate collection tank 81 and the sewage pool 83, so as to control the liquid level inside the tank body and adjust it reasonably according to the water consumption.

[0031] like Figure 1 and 2 , design a temporary processing component, which includes a temporary steam condensate collection tank. The temporary steam condensate collection tank is isolated from the steam condensate collection tank and arranged near the reboiler; close the manual valve at the outlet of the low-pressure steam zone of the reboiler, connect the drain to the temporary steam condensate collection tank (if the drain is too small, it can be temporarily isolated and replaced with a three-way pipe and then connected to the temporary steam condensate collection tank), the flammable gas dissolved in the steam condensate is precipitated in the temporary steam condensate collection tank, and the flammable gas accumulated on the top of the tank is discharged to the flare removal system to avoid the formation of an explosive mixture and reduce safety risks; the liquid level in the temporary steam condensate collection tank reasonably adjusts the inlet and outlet openings according to the water consumption, and the discharge is controlled by the liquid level valve to stabilize it within the control range of the process requirements. This device is used as a temporary disposal measure to facilitate maintenance and other unexpected situations.

[0032] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A steam reboiler tube bundle anti-leakage structure, characterized in that: It includes a temporary processing assembly installed between the reboiler and the steam condensate collecting tank, and an electric control valve is provided at the front end of the steam condensate flowing to the temporary processing assembly; The temporary processing assembly comprises a temporary steam condensate collection tank, the top of which is connected to the flare removal system, a liquid level sensor is arranged inside the temporary steam condensate collection tank, and the bottom is connected to the sewage pool outside; The rear end of the steam condensate collecting tank is connected to the chemical water collecting device.

2. The anti-leakage structure of a steam reboiler tube bundle according to claim 1, characterized in that: A shower guide is arranged on the conduit leading out of the temporary treatment component, and the electric control valve is arranged at the liquid inlet front end of the shower guide.

3. The anti-leakage structure of a steam reboiler tube bundle according to claim 1, characterized in that: A three-way pipe is arranged on the conduit leading out of the temporary treatment component, and the electric control valve is arranged at the liquid inlet front end of the three-way pipe.

4. A steam reboiler tube bundle anti-leakage structure according to claim 1 or 2, characterized in that: An isolation blind plate is also provided between the reboiler and the steam condensate collecting tank, and the isolation blind plate is arranged at the liquid inlet rear end of the electric control valve.

5. The anti-leakage structure of a steam reboiler tube bundle according to claim 4, characterized in that: One end of the reboiler is connected to the T202 tower, and the other end is connected to the steam condensate collection tank.

6. The anti-leakage structure of a steam reboiler tube bundle according to claim 5, characterized in that: The electric control valve is also provided on the pipeline connecting the temporary steam condensate collection tank and the flare removal system.

7. The anti-leakage structure of a steam reboiler tube bundle according to claim 6, characterized in that: A liquid level valve is provided on the pipeline connecting the temporary steam condensate collection tank and the sewage pool.

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