Normal-pressure heating heat exchange device

Abstract

The utility model provides a normal-pressure heating and heat exchanging device, and belongs to the technical field of oil exploitation. The problem that a heat exchange device in the prior art is low in heat exchange efficiency is solved. The utility model relates to a heat exchange device, which comprises a shell of the heat exchange device, a multi-way sleeved spiral pipe, a discharge flue, a spiral circulating water preheating pipe, a water return port, a supply bin, a condensation bin, a heating bin, a water outlet and a combustion chamber, the multi-way sleeved spiral pipe and the spiral circulating water preheating pipe are encircled to form a barrel, and the middle space of the barrel is sequentially provided with the supply bin, the condensation bin and the heating bin from top to bottom; the heating bin is located in the combustion chamber, the combustion chamber is installed at the bottom of the shell, a discharge flue is arranged in the space, where the supply bin and the condensation bin are located, in the shell, one end of the spiral circulating water preheating pipe is connected with a water return port in the heating bin, and the other end of the spiral circulating water preheating pipe is connected with the multi-way sleeved spiral pipe. And the multi-path sleeved spiral pipe is connected with a water outlet of the heating bin. The device is mainly used for utilizing oil wellhead associated gas.

Description

Technical Field

[0001] The utility model belongs to the technical field of petroleum exploitation, and particularly relates to a normal pressure heating and heat exchanging device. Background Art

[0002] After oil is extracted from the oil well, it needs to be transported to distant work groups through pipelines. When the temperature drops to the critical temperature, solidified wax blocks the pipeline and needs to be heated. At present, oil fields mainly use electric heating and gas heating. Specifically, the accompanying heating method of winding electric belts around the outside of the oil pipeline and inserting electric heating rods inside the oil pipeline and the centralized dynamic heating of electric heaters at the wellhead and associated gas at the wellhead are adopted. Because the cost of heating associated gas at the wellhead is low, it is gradually favored by oil fields. However, the existing associated gas heating heat exchange device has an unreasonable structure and low heat exchange efficiency. The industrial product manufacturing process is relatively complex and difficult to achieve, and it is basically in the stage of a theoretical model. Utility Model Content

[0003] In view of this, the utility model aims to provide a normal pressure heating heat exchange device to solve the problem of low heat exchange efficiency of the heat exchange device in the prior art.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A normal pressure heating heat exchange device comprises an outer shell of the heat exchange device, a multi-way set spiral tube, a smoke exhaust duct, a spiral circulating water preheating pipe, a return water port, a supply bin, a condensing bin, a heating bin, a water outlet and a combustion chamber, wherein the multi-way set spiral tube and the spiral circulating water preheating pipe are surrounded into a cylindrical shape, and the middle space of the cylinder is provided with a supply bin, a condensing bin and a heating bin from top to bottom in sequence, the heating bin is located in the combustion chamber, the combustion chamber is installed at the bottom of the outer shell, and a smoke exhaust duct is provided in the space where the supply bin and the condensing bin are located in the outer shell, one end of the spiral circulating water preheating pipe is connected to the return water port on the heating bin, and the other end is connected to the multi-way set spiral tube, and the multi-way set spiral tube is connected to the water outlet of the heating bin.

[0006] Furthermore, the multi-channel set spiral tube includes multiple groups of spiral coils arranged in parallel, the spiral coils include a spiral crude oil chamber and a spiral hot water chamber, the spiral crude oil chamber is nested in the spiral hot water chamber, one end of the spiral hot water chamber is connected to the spiral circulating water preheating tube, and the other end is connected to the water outlet.

[0007] Furthermore, the water flow rate in the spiral hot water chamber is greater than the crude oil flow rate in the spiral crude oil chamber.

[0008] Furthermore, a plurality of spiral crude oil chambers are nested in the spiral hot water chamber.

[0009] Furthermore, valves are provided at the connection between the supply bin and the condensation bin, and at the connection between the condensation bin and the heating bin.

[0010] Furthermore, the supply bin, condensation bin and heating bin are all equipped with automatic control modules.

[0011] Furthermore, the automatic control module includes a single-chip microcomputer, a temperature sensor, a water level sensor and an alarm. The temperature sensor and the water level sensor respectively transmit real-time temperature and water level information to the single-chip microcomputer. The single-chip microcomputer is used to issue water replenishment instructions, and the alarm is used to notify staff to perform maintenance when the temperature is abnormal.

[0012] Furthermore, a condenser is provided in the condenser bin, and two ends of the condenser are respectively arranged in the supply bin and the heating bin.

[0013] Furthermore, the end of the condenser tube in the supply bin is above the liquid level in the supply bin.

[0014] Furthermore, a filling port and a breathing port are provided above the supply bin.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model realizes the efficient utilization of the associated gas at the wellhead, and can reduce the use of oil field electricity while heating the crude oil, thus realizing energy conservation and emission reduction.

[0017] 2. The utility model has a reasonable structure and a simple manufacturing process, which is easy to implement.

[0018] 3. The utility model has a centralized structure, is easy to transport, assemble and maintain, and is conducive to being arranged at remote and sparse wellheads.

[0019] 4. The utility model adopts a multi-channel set of spiral tubes, which can carry out heat exchange with multiple groups of heat exchange tubes at the same time. The spiral coil of the utility model adopts a nested structure of an outer spiral hot water cavity covering an inner spiral crude oil cavity, which can make the crude oil in the inner spiral crude oil cavity heated more evenly, thereby improving the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0021] Figure 1 This is a structural schematic diagram of a normal pressure heating heat exchange device described in the utility model;

[0022] Figure 2 It is a schematic diagram of the structure of the spiral coil;

[0023] Figure 3It is a structural schematic diagram of a multi-channel set spiral tube;

[0024] Figure 4 It is a schematic diagram of a spiral hot water chamber having multiple spiral crude oil chambers;

[0025] Figure 5 This is a schematic diagram of the installation of a multi-channel set of spiral tubes;

[0026] Figure 6 A schematic diagram of the interior of a normal pressure heating heat exchange device Figure 1 ;

[0027] Figure 7 A schematic diagram of the interior of a normal pressure heating heat exchange device Figure 2 ;

[0028] Figure 8 This is a schematic diagram of the installation of a multi-channel spiral tube set.

[0029] 1- filling port, 2- breathing port, 3- exhaust duct, 4- shell, 5- spiral crude oil chamber, 6- spiral hot water chamber, 7- automatic control module, 8- spiral circulating water preheating pipe, 9- return water port, 10- valve, 11- supply bin, 12- condensation bin, 13- heating bin, 14- condensation pipe, 15- water outlet, 16- combustion chamber, 17- multi-way set spiral pipe. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely explain the technical solutions in the embodiments of the utility model. It should be noted that the embodiments and features in the embodiments of the utility model can be combined with each other without conflict, and the described embodiments are only part of the embodiments of the utility model, not all of the embodiments.

[0031] See also Figure 1-8 To illustrate this embodiment, a normal pressure heating heat exchange device includes a shell 4 of the heat exchange device, a multi-way set spiral tube 17, a smoke exhaust duct 3, a spiral circulating water preheating pipe 8, a return port 9, a supply bin 11, a condensing bin 12, a heating bin 13, a water outlet 15 and a combustion chamber 16, wherein the multi-way set spiral tube 17 and the spiral circulating water preheating pipe 8 are surrounded by a cylinder, and the middle space of the cylinder is provided with a supply bin 11, a condensing bin 12 and a heating bin 13 from top to bottom, the heating bin 13 is located in the combustion chamber 16, and the combustion chamber 16 is installed at the bottom of the shell 4, and the smoke exhaust duct 3 is provided in the space where the supply bin 11 and the condensing bin 12 are located in the shell 4, one end of the spiral circulating water preheating pipe 8 is connected to the return port 9 on the heating bin 13, and the other end is connected to the multi-way set spiral tube 17, and the multi-way set spiral tube 17 is connected to the water outlet 15 of the heating bin 13.

[0032] The multi-channel set spiral tube 17 includes multiple groups of spiral coils arranged in parallel, and the spiral coils include a spiral crude oil chamber 5 and a spiral hot water chamber 6. The spiral crude oil chamber 5 is nested in the spiral hot water chamber 6. One end of the spiral hot water chamber 6 is connected to the spiral circulating water preheating tube 8, and the other end is connected to the water outlet 15.

[0033] Firstly, the wellhead associated gas is burned in the combustion chamber 16. Since the heating chamber 13 is located in the combustion chamber 16, high-temperature steam is generated in the heating chamber 13. Part of it is cooled into liquid through the condensing chamber 12 and flows back to the heating chamber 13, and the remaining part is discharged into the atmosphere through the supply chamber 11. Then the circulating water in the spiral circulating water preheating pipe 8 enters the heating chamber 13 from the return water port 9. The multi-channel set spiral tube 17 and the spiral circulating water preheating pipe 8 are both arranged on the exhaust duct 3 of the exhaust gas. The high-temperature exhaust gas generated by the combustion is used to heat the circulating water in the multi-channel set spiral tube 17 and the spiral circulating water preheating pipe 8, and then heat the crude oil in the spiral crude oil cavity 5, avoiding the blockage of the pipeline caused by the solidification of wax inside the pipeline due to the low temperature. The device uses the combustion of the imported associated gas to generate heat for heat exchange, and then heats the spiral crude oil cavity 5. A plurality of sets of spiral coils arranged in parallel are provided, which can perform heat exchange work at the same time, thereby improving the heat exchange efficiency.

[0034] The device realizes the efficient utilization of associated gas at the wellhead, reduces the use of electricity in the oil field while heating crude oil, and achieves energy conservation and emission reduction. It has a reasonable structure, a simple and easy manufacturing process, a centralized structure, and is easy to transport, assemble and maintain, making it conducive to deployment at remote and sparse wellheads.

[0035] The water flow rate in the spiral hot water chamber 6 is greater than the flow rate of the crude oil in the spiral crude oil chamber 5 , ensuring that the crude oil can be heated by the hot water all the time while traveling in the spiral crude oil chamber 5 .

[0036] A plurality of spiral crude oil chambers 5 are nested in the spiral hot water chamber 6. The spiral coil can use one spiral hot water chamber 6 to wrap a plurality of spiral crude oil chambers 5 according to actual needs, or can use a plurality of spiral hot water chambers 6 to separately wrap a spiral crude oil chamber 5, thereby heating the crude oil more fully.

[0037] Valves 10 are provided at the connection between the supply bin 11 and the condensation bin 12 and at the connection between the condensation bin 12 and the heating bin 13, for replenishing water from the supply bin 11 to the condensation bin 12 when the water in the condensation bin 12 is insufficient, and for replenishing water from the condensation bin 12 to the heating bin 13 when the water in the heating bin 13 is insufficient.

[0038] A condenser 14 is provided in the condensing bin 12, and both ends of the condenser 14 are respectively arranged in the supply bin 11 and the heating bin 13. Part of the high-temperature steam generated in the heating bin 13 is condensed into liquid through the condenser 14 and flows back to the heating bin 13, and part of it enters the supply bin 11 and is discharged into the atmosphere through the supply bin 11. Since the water in the condensing bin 12 is gradually preheated during the heat exchange process with the high-temperature steam in the condenser 14, the insufficient circulating water in the heating bin 13 is supplemented and enters the heating bin 13. Since the circulating water entering is preheated, the drastic drop in the water temperature in the heating bin 13 can be reduced, ensuring that the temperature of the circulating water entering the multi-channel set spiral tube 17 is stable.

[0039] The supply chamber 11 , the condensing chamber 12 and the heating chamber 13 are all equipped with an automatic control module 7 .

[0040] The automatic control module 7 includes a single chip microcomputer, a temperature sensor, a water level sensor and an alarm. The temperature sensor and the water level sensor transmit real-time temperature and water level information to the single chip microcomputer respectively. The single chip microcomputer is used to issue a water replenishment instruction. The alarm is used to notify the staff to perform maintenance when the temperature is abnormal.

[0041] The temperature sensor and water level sensor send real-time temperature and water level information to the single-chip microcomputer respectively. When the water level in the heating bin 13 or the condensing bin 12 is insufficient, the single-chip microcomputer sends instructions to the corresponding valves to add water. When the water level in the supply bin 11 is insufficient, the alarm is used to notify the on-duty personnel to add water from the filling port. When the overall temperature is too high, the single-chip microcomputer controls the gas engine to reduce the flame or increase the ignition interval of the gas engine. When the overall temperature is too low, the single-chip microcomputer controls the gas engine to increase the flame or reduce the ignition interval of the gas engine. When the local temperature is abnormal, an alarm is issued to remind the on-duty personnel to carry out maintenance.

[0042] The end of the condenser 14 in the supply bin 11 is above the liquid level in the supply bin 11. A filling port 1 and a breathing port 2 are provided above the supply bin 11. When the water in the supply bin 11 is insufficient, water is added to the supply bin 11 through the filling port 1, and the gas that enters the supply bin 11 through the condenser 14 is discharged into the atmosphere through the breathing port 2, so that the heating bin 13 maintains a normal pressure state.

[0043] The return water port 9 is arranged along the tangent direction of the heating chamber 13 wall, so that the circulating water flows in a circular flow along the heating chamber 13 wall. The return water port 9 and the water outlet 15 of the heating chamber 13 are arranged to prevent uneven heating of the circulating water. The high-temperature circulating water is trapped in the heating chamber 13, and the cold circulating water enters the multi-way set spiral pipe 17 without being replenished.

[0044] The embodiments of the utility model disclosed above are only used to help explain the utility model. The embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. According to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model.

Claims

1. A normal pressure heating heat exchange device, characterized in that: The invention comprises a shell (4) of a heat exchange device, a multi-channel set spiral pipe (17), a smoke exhaust duct (3), a spiral circulating water preheating pipe (8), a water return port (9), a supply bin (11), a condensing bin (12), a heating bin (13), a water outlet (15) and a combustion chamber (16), wherein the multi-channel set spiral pipe (17) and the spiral circulating water preheating pipe (8) are surrounded to form a cylindrical shape, and the middle space of the cylindrical shape is provided with a supply bin (11), a condensing bin (12) and a heating bin (13) in sequence from top to bottom. The heating chamber (13) is located in the combustion chamber (16), and the combustion chamber (16) is installed at the bottom of the outer shell (4). A smoke exhaust duct (3) is provided in the space where the supply chamber (11) and the condensation chamber (12) are located in the outer shell (4). One end of the spiral circulating water preheating pipe (8) is connected to the return water port (9) on the heating chamber (13), and the other end is connected to the multi-way set spiral pipe (17), and the multi-way set spiral pipe (17) is connected to the water outlet (15) of the heating chamber (13).

2. The normal pressure heating heat exchange device according to claim 1, characterized in that: The multi-channel set spiral tube (17) comprises a plurality of groups of spiral coils arranged in parallel, wherein the spiral coils comprise a spiral crude oil chamber (5) and a spiral hot water chamber (6), wherein the spiral crude oil chamber (5) is nested in the spiral hot water chamber (6), wherein one end of the spiral hot water chamber (6) is connected to the spiral circulating water preheating tube (8), and the other end is connected to the water outlet (15).

3. The normal pressure heating heat exchange device according to claim 2, characterized in that: The water flow rate in the spiral hot water chamber (6) is greater than the crude oil flow rate in the spiral crude oil chamber (5).

4. The normal pressure heating heat exchange device according to claim 2, characterized in that: A plurality of spiral crude oil chambers (5) are nested in the spiral hot water chamber (6).

5. The normal pressure heating heat exchange device according to claim 1, characterized in that: Valves (10) are provided at the connection between the supply bin (11) and the condensation bin (12) and at the connection between the condensation bin (12) and the heating bin (13).

6. The normal pressure heating heat exchange device according to claim 5, characterized in that: The supply bin (11), the condensation bin (12) and the heating bin (13) are all equipped with an automatic control module (7).

7. The normal pressure heating heat exchange device according to claim 6, characterized in that: The automatic control module (7) comprises a single chip microcomputer, a temperature sensor, a water level sensor and an alarm. The temperature sensor and the water level sensor transmit real-time temperature and water level information to the single chip microcomputer respectively. The single chip microcomputer is used to issue a water replenishment instruction. The alarm is used to notify staff to conduct maintenance when the temperature is abnormal.

8. The normal pressure heating heat exchange device according to claim 1, characterized in that: A condensation pipe (14) is provided in the condensation bin (12), and two ends of the condensation pipe (14) are respectively arranged in the supply bin (11) and the heating bin (13).

9. The normal pressure heating heat exchange device according to claim 8, characterized in that: The end of the condenser pipe (14) in the supply bin (11) is located above the liquid level in the supply bin (11), and a filling port (1) and a breathing port (2) are provided above the supply bin (11).

10. The normal pressure heating heat exchange device according to claim 9, characterized in that: The water return port (9) is arranged along the tangent direction of the heating chamber (13) wall.

Images