CN216815127U - Take shell-and-tube type crude oil indirect heating equipment of self-cleaning system - Google Patents
Take shell-and-tube type crude oil indirect heating equipment of self-cleaning system Download PDFInfo
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- CN216815127U CN216815127U CN202220475861.5U CN202220475861U CN216815127U CN 216815127 U CN216815127 U CN 216815127U CN 202220475861 U CN202220475861 U CN 202220475861U CN 216815127 U CN216815127 U CN 216815127U
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Abstract
The utility model relates to a shell-and-tube crude oil heat exchange device with a self-cleaning system, which comprises a heat exchanger, a steam generator and a heat exchanger, wherein the heat exchanger comprises a shell and tube boxes which are arranged at two ends of the shell respectively; the pipe box at the oil inlet end is connected with an air compressor through an air compressor stop valve; the oil outlet end pipe box is also connected with a crude oil collector through a crude oil collector stop valve, and the crude oil collector is connected with the oil outlet pipe through a pipeline with an oil return stop valve. And the sweeping, cleaning and recovery equipment and the heat exchanger are integrated into a whole by adopting an integrated design. Purging residual oil with compressed air, recovering the residual oil with a crude oil collector and recycling, purging scales in the heat exchange pipe with high-temperature steam, after the purging is finished, purging residual moisture with compressed air, and switching the heat exchanger to a normal operation state through valve operation. Therefore, equipment cleaning can be completed through valve switching operation, and complex manual operation is avoided.
Description
Technical Field
The utility model relates to a shell-and-tube heat exchange device for heating crude oil.
Background
The existing shell-and-tube heat exchange equipment for heating crude oil generally consists of a shell and two tube boxes. The outer layer of the shell is rolled by a steel plate, the two ends of the shell are sealed by tube plates, a plurality of tube holes are formed in the tube plates, and heat exchange tubes are fixed in the tube holes. The outer sides of the two tube plates are respectively provided with a tube box connected with the tube plates. The tube box is formed into a closed space by a flange, a cylinder and a seal head. The flange and the shell tube plate form a detachable connecting structure so as to be opened when in maintenance. The shell is supported by the saddle and is placed on a fixed foundation. The shell and the pipe box are provided with a plurality of interfaces for medium inlet and outlet, impurity discharge, pressure monitoring and other necessary purposes.
The space inside the shell and outside the heat exchange tube forms a shell pass. The space inside the heat exchange tube in the shell and the space of the two tube boxes jointly form a tube pass. Hot water and crude oil flow in the shell side and the tube side respectively, so that the process aim of heat transfer without mass transfer is fulfilled.
This approach suffers from the following major disadvantages:
first, cleaning inside the tube is difficult. The composition of crude oil as a mixture is very complex, wherein high molecular paraffin components are easy to scale in a heat exchange tube, so that the heat exchange efficiency is influenced, and the heat exchange tube is even blocked by long-term scaling, so that equipment failure is caused. The common solution is to periodically clean, i.e. periodically open the tube plate and forcibly clean the heat exchange tube by mechanical or hydraulic methods, so as to achieve the purpose of removing the scale. The method is complex in operation, the pipe box needs to be disassembled firstly and then cleaned manually, and the pipe box needs to be reinstalled afterwards to carry out pressure test and heat preservation treatment again.
Secondly, the heat exchange tube damage rate is high. When the mechanical cleaning is carried out, the cleaning ball passes through the heat exchange tube with strong force and is inevitably collided with the inner wall of the heat exchange tube. When the water pressure is used for cleaning, high-pressure water is used for washing the inside of the heat exchange tube to strip scales, and the heat exchange tube is difficult to be damaged. The heat exchange tube is the core of the shell-and-tube heat exchanger and is also the weakest part. The damage to the heat exchange pipe reduces the service life of the equipment if the damage is light, and leads to the scrapping of the equipment if the damage is heavy.
Thirdly, the labor intensity is high. The tube box carrying, the heat exchange tube cleaning, the tube box mounting, the heat preservation treatment and the like belong to heavy physical labor, the labor intensity of operators is high, the labor time consumption is high, and the utilization efficiency of equipment is influenced.
Fourth, poor safety and high fire risk. When the heat exchange pipe is cleaned, the flammable medium is directly exposed to the atmosphere, electricity is inevitably used during operation, and electric sparks can cause fire.
Fifthly, the transportation cost is high. The installation site of the heat exchanger is generally not suitable for on-site cleaning, and the equipment needs to be transported to a special safety place, which increases the transportation cost of users.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is to provide a shell-and-tube crude oil heat exchange device with a self-cleaning system, wherein the residual oil is swept by compressed air, the residual oil is recovered by a crude oil collector and recycled, scales in a heat exchange tube are swept by high-temperature steam, after the cleaning is finished, the residual moisture is swept by introducing the compressed air, and a heat exchanger is switched to a normal operation state through valve operation so as to avoid complex manual operation.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the utility model provides a take shell and tube type crude oil indirect heating equipment of self-cleaning system, includes the heat exchanger, the heat exchanger includes the casing, the casing both ends are sealed through the tube sheet respectively, the tube hole has been seted up on the tube sheet, and the tube hole internal fixation has the heat exchange tube that runs through the casing, and the tube sheet outside is fixed with a pipe case, and the heat exchange tube communicates with each other with the pipe case at both ends, is connected with into oil pipe on the pipe case of oil feed end, is connected with out oil pipe on the pipe case of play oil end, go out water stop valve and the stop valve that intakes, its characterized in that are installed respectively to the casing: the crude oil heat exchange equipment also comprises a steam generator, and the steam generator is connected with a pipe box at the oil inlet end through a steam generator stop valve; the pipe box at the oil inlet end is connected with an air compressor through an air compressor stop valve; the oil outlet end of the oil pipe box is also connected with a crude oil collector through a crude oil collector stop valve, and the crude oil collector is connected with the oil outlet pipe through a pipeline with an oil return stop valve.
Preferably, the pipe box at the oil outlet end is also connected with a sewage discharge stop valve.
Preferably, the crude oil collector is provided with a liquid level observation window.
Preferably, the steam generator, the air compressor and the crude oil collector are mounted on the same base.
The utility model has the positive effects that:
firstly, the utility model adopts an integrated design, and integrates the purging, cleaning and recycling equipment and the heat exchanger. Purging residual oil with compressed air, recovering the residual oil with a crude oil collector and recycling, purging scales in the heat exchange pipe with high-temperature steam, purging residual moisture with compressed air after cleaning, and switching the heat exchanger to a normal operation state through valve operation. Therefore, equipment cleaning can be completed through valve switching operation, and complex manual operation is avoided.
Secondly, the utility model adopts a steam descaling design, utilizes the temperature of the steam to soften the scale and then utilizes the speed of the steam to wash away the scale. The steam is not impacted for a certain position, and the loss of the heat exchange pipe is reduced to the minimum. The small electric steam generator is used as a steam source, so that the safety is high, the manufacturing cost is low, and the maintenance is simple and convenient.
Thirdly, the utility model adopts the valve operation, avoids heavy physical labor such as tube plate disassembly, greatly reduces labor intensity, and simultaneously reduces working hour consumption.
Fourthly, closed cleaning operation is adopted, flammable media do not contact the atmosphere, and fire risks are thoroughly eliminated.
And fifthly, the utility model adopts on-line cleaning operation without carrying equipment, thereby saving the transportation cost for users.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
In the figure, 1, a housing; 2. a pipe box; 3. an oil inlet stop valve; 4. a steam generator shut-off valve; 5. a steam generator; 6. an air compressor stop valve; 7. an air compressor; 8. a water outlet stop valve; 9. an oil outlet stop valve; 10. a crude oil collector stop valve; 11. a crude oil collector; 12. an oil return stop valve; 13. a blowdown stop valve; 14. water inlet stop valve.
Detailed Description
The utility model is further illustrated by the following figures and examples.
Referring to FIG. 1, the shell-and-tube crude oil heat exchange equipment with the self-cleaning system comprises a heat exchanger. The heat exchanger comprises a shell and a tube box 2 which is arranged at two ends of the shell 1. The shell 1 is made of carbon steel plates in a rolling mode, two ends of the shell are sealed by stainless steel tube plates, a plurality of tube holes are formed in the tube plates, and stainless steel heat exchange tubes are fixed in the tube holes. And the outer sides of the two tube plates are fixedly connected with a tube box 2 made of stainless steel respectively. The tube box 2 is a closed space formed by a flange, a cylinder and a seal head. The flange and the tube plate form a detachable connecting structure so as to be opened during maintenance. The housing 1 is supported by a saddle and is placed on a fixed foundation (the saddle and the foundation are not shown in the figures). The shell 1 and the tube box 2 are provided with a plurality of interfaces for necessary safety valve tubes, pressure gauge tubes, air release tubes, water discharge tubes and the like (the structure of the utility model is highlighted, and the figures do not show the interfaces).
The space inside the shell 1 and outside the stainless steel heat exchange tube forms a shell pass. The space inside the stainless steel heat exchange tube in the shell 1 and the space of the two tube boxes jointly form a tube pass.
Wherein the pipe box at the oil inlet end is connected with an oil inlet pipe with an oil inlet stop valve 3, and the pipe box at the oil outlet end is connected with an oil outlet pipe with an oil outlet stop valve 9. The oil inlet pipe and the oil outlet pipe are respectively communicated with two ends of the pipe pass. The oil inlet stop valve 3 is used for controlling crude oil to enter the heat exchanger, and the oil inlet stop valve 3 is closed during cleaning operation. The oil outlet stop valve 9 is used for controlling crude oil to flow out of the heat exchanger, and the oil outlet stop valve 9 is closed during cleaning operation.
The shell-and-tube crude oil heat exchange equipment with the self-cleaning system further comprises a steam generator 5, and the steam generator 5 is connected with the tube box 2 at the oil inlet end through a steam generator stop valve 4. The steam generator stop valve 4 is used for controlling steam to enter the tube side of the heat exchanger to clean dirt. The steam generator 5 is a small water tank in which a powerful electric heater is installed. When the device works, the electric heater heats water to generate steam, and the steam enters the tube pass of the heat exchanger to be used for cleaning scale. The steam generator 5 is provided with a liquid level control part, and the power is automatically cut off when the water level is too low so as to avoid dry burning of the electric heater.
The shell-and-tube crude oil heat exchange equipment with the self-cleaning system further comprises an air compressor 7, and the air compressor 7 is connected with the tube box 2 at the oil inlet end through an air compressor stop valve 6. The air compressor 7 is used for generating compressed air and blowing liquid residual oil in the tube pass of the heat exchanger. The air compressor stop valve 6 is used for controlling compressed air to enter a heat exchanger tube side and purging liquid media.
The casing 1 is installed respectively and is gone out water stop valve 8 and intake stop valve 14 for control hot water flows out the heat exchanger, and during the washing operation, goes out water stop valve 8 and closes. And pipelines with a stop valve 14 and a water outlet stop valve 8 are respectively communicated with the shell pass. The water inlet stop valve 14 is used for controlling hot water to enter the shell side of the heat exchanger. In the washing operation, the water inlet shutoff valve 14 is closed.
The tube box at the oil outlet end is further connected with a crude oil collector 11 through a crude oil collector stop valve 10, the crude oil collector 11 is connected with the oil outlet pipe through a pipeline with an oil return stop valve 12, and the connecting point of the pipeline with the oil return stop valve 12 and the oil outlet pipe is positioned at the rear end or behind the oil outlet stop valve 9. The oil return stop valve 12 cooperates with the crude oil collector 11 for recovering residual oil in the tube pass of the heat exchanger during cleaning. When cleaning, the crude oil collector stop valve 10 is used for leading the heat exchanger tube side residual oil into the crude oil collector 11, and the oil utilization rate is improved. The crude oil collector 11 is a small tank used to recover residual oil in the heat exchanger tube pass before cleaning. The crude oil collector 11 is provided with a liquid level observation window, after the crude oil collector is filled with oil, the oil return stop valve 12 is opened to guide residual oil into the oil outlet system so as to be utilized, the oil utilization rate is improved, and compressed air is closed after the liquid level observation window is oilless so as to prevent the compressed air from entering the crude oil system.
The pipe box at the oil outlet end is also connected with a pollution discharge stop valve 13. The blow-off cutoff valve 13 is used to discharge waste steam and the like at the time of cleaning. The piping behind the blowdown shut-off valve 13 should direct the exhaust steam to a safe location for discharge.
The equipment has the working flow as follows: in the first step, the oil inlet stop valve 3 and the oil outlet stop valve 9 are closed. And secondly, opening an air compressor stop valve 6, a crude oil collector stop valve 10 and an air compressor 7, and guiding residual oil in a tube pass of the heat exchanger into a crude oil collector 11. After the crude oil collector 11 is filled, the oil return stop valve 12 is opened to discharge oil to the oil outlet pipe until residual oil in the heat exchanger pipe pass is completely discharged. And closing the air compressor 7, the air compressor stop valve 6, the crude oil collector stop valve 10 and the oil return stop valve 12. And thirdly, opening a steam generator stop valve 4, a pollution discharge stop valve 13 and a steam generator 5, enabling steam to enter a heat exchanger tube pass, descaling at high temperature, and discharging waste steam to a safe position through the pollution discharge stop valve 13. Fourthly, no foreign matter is discharged when the discharge site behind the pollution discharge stop valve is more, and the cleaning is finished. The steam generator 5 is closed, and after a while, the steam generator shut-off valve 4 is closed. And fifthly, opening and opening the air compressor stop valve 6 and the air compressor 7, and purging and discharging stored water and steam. And sixthly, closing all other valves except the gas release opening of the pipe box at the oil inlet stop valve 3. The oil outlet stop valve 9 is slightly opened to allow crude oil to slowly fill the tube side of the heat exchanger, and when the emptying valve of the oil inlet end tube box overflows the crude oil, the valve is closed. And opening the oil inlet stop valve 3 and the oil outlet stop valve 9, and opening the water outlet stop valve 8 and the water inlet stop valve 14 after a while. At this point, the system shifts to normal heat exchange operation.
The pressure, temperature, corrosivity and other characteristics of the crude oil should be fully considered for each valve, pipe fitting and the like, and appropriate materials are adopted. The electrical system of the steam generator 5 and the air compressor 7 should fully consider the explosion-proof requirement of the field, and adopt elements with proper protection grade. The steam generator 5 should be provided with a liquid level control part, and the power is automatically cut off when the water level is too low, so as to avoid dry burning of the electric heater.
Claims (4)
1. A shell-and-tube crude oil heat exchange device with a self-cleaning system comprises a heat exchanger, wherein the heat exchanger comprises
Casing (1), casing (1) both ends are sealed through the tube sheet respectively, the tube hole has been seted up on the tube sheet, and the tube hole internal fixation has the heat exchange tube that runs through casing (1), and the tube sheet outside is fixed with a tub case (2), and the heat exchange tube communicates with each other with tub case (2) at both ends, is connected with into oil pipe on tub case (2) of oil inlet end, is connected with out oil pipe on the tub case of play oil end, casing (1) is installed out water stop valve (8) and intake stop valve (14), its characterized in that respectively: the crude oil heat exchange equipment also comprises a steam generator (5), wherein the steam generator (5) is connected with a pipe box (2) at the oil inlet end through a steam generator stop valve (4); the pipe box (2) at the oil inlet end is connected with an air compressor (7) through an air compressor stop valve (6); the oil outlet end pipe box (2) is also connected with a crude oil collector (11) through a crude oil collector stop valve (10), and the crude oil collector (11) is connected with the oil outlet pipe through a pipeline with an oil return stop valve (12).
2. The shell and tube crude oil heat exchange unit with a self cleaning system of claim 1, wherein: the pipe box at the oil outlet end is also connected with a pollution discharge stop valve (13).
3. The shell and tube crude oil heat exchange unit with a self cleaning system of claim 1, wherein:
the crude oil collector (11) is provided with a liquid level observation window.
4. The shell and tube crude oil heat exchange unit with a self cleaning system of claim 1, wherein: the steam generator (5), the air compressor (7) and the crude oil collector (11) are arranged on the same base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220475861.5U CN216815127U (en) | 2022-03-07 | 2022-03-07 | Take shell-and-tube type crude oil indirect heating equipment of self-cleaning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220475861.5U CN216815127U (en) | 2022-03-07 | 2022-03-07 | Take shell-and-tube type crude oil indirect heating equipment of self-cleaning system |
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| Publication Number | Publication Date |
|---|---|
| CN216815127U true CN216815127U (en) | 2022-06-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220475861.5U Active CN216815127U (en) | 2022-03-07 | 2022-03-07 | Take shell-and-tube type crude oil indirect heating equipment of self-cleaning system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216815127U (en) |
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2022
- 2022-03-07 CN CN202220475861.5U patent/CN216815127U/en active Active
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