Oil gas three-stage condensing device

Abstract

The utility model relates to an oil gas three-stage condensing device which comprises a first-stage condenser, a second-stage condenser and a third-stage condenser, and the first-stage condenser, the second-stage condenser and the third-stage condenser respectively comprise a condensing tank body, a cooling water outlet pipe, an oil discharge pipe, a mounting pipe plate, a condensing pipe, a water inlet jacket, a cooling water inlet pipe, a gas inlet coil pipe and a non-condensable gas inlet pipe. A gas outlet is formed in the upper portion of the condensation tank body, a communicating pipe is arranged between the second-stage condenser and the first-stage condenser and between the second-stage condenser and the third-stage condenser, and a discharging pipe is fixed to the bottom of the oil discharging pipe. According to the utility model, non-condensable gas can be continuously condensed and recycled through three stages of condensers connected in series, oil gas can be better recycled, a water inlet jacket is arranged on the outer side of the lower part of each stage of condenser, so that the condensation tank body can be cooled, water is supplied to a condensation pipe in the condensation tank body, and in addition, gas entering the condensation tank body is distributed through a gas inlet coil pipe; gas distribution is more uniform, and the condensation effect is better.

Description

Technical Field

[0001] The utility model relates to an oil and gas three-stage condensation device, belonging to the technical field of condensation equipment. Background Art

[0002] When treating sludge, the oil and gas will be separated and then condensed and cooled by the condensing device to recover the oil and gas. The traditional condensing device uses a plate heat exchanger, but the condensation effect of such a structure is not good, and the oil and gas contain a large amount of sludge particles, which are easily attached to the heat exchange plate, affecting the heat exchange effect and blocking the air outlet channel of the heat exchange plate. Therefore, we use a spray tower to spray and recover the oil and gas. There will be many oil and gas components with low condensation points in the non-condensable gas after spraying, so a multi-stage continuous condensation device is required. Utility Model Content

[0003] The utility model provides an oil and gas three-stage condensing device, which solves the problem that the non-condensable gas cannot be further condensed and recovered after the oil and gas are sprayed and recovered.

[0004] The utility model relates to an oil and gas three-stage condensing device, comprising a first-stage condenser, a second-stage condenser and a third-stage condenser. The first-stage condenser, the second-stage condenser and the third-stage condenser all comprise a condensing tank body. A cooling water outlet pipe is fixed on the top of each condensing tank body, an oil drain pipe is fixed on the bottom of the condensing tank body, a mounting tube plate is fixed on the upper part of the condensing tank body, a plurality of condensing tubes are evenly fixed on the mounting tube plate, a water inlet jacket is provided on the lower outer side of the condensing tank body, the lower end of the condensing tube passes through the condensing tank body and is connected to the water inlet jacket, a cooling water inlet pipe is fixed on the bottom of the water inlet jacket, a vortex-shaped air inlet coil is fixed on the lower inner wall of the condensing tank body, distributed air holes are evenly provided on the top of the air inlet coil, a non-condensable air inlet pipe is connected to the air inlet coil, an air outlet is provided on the upper part of the condensing tank body, a connecting pipe is provided between the second-stage condenser and the first-stage condenser and the third-stage condenser, and a discharge pipe is fixed on the bottom of the oil drain pipe.

[0005] As a preferred embodiment, the distribution air holes are arranged with an inner low and an outer high inclination, so that the gas entering and exiting the air inlet coil can be sprayed outwardly with an inclination, and the distribution is more uniform.

[0006] As a preferred embodiment, a reinforcing rod is provided on the air intake coil to make the air intake coil more stable.

[0007] As a preferred embodiment, a ventilation pipe is fixedly connected to the air inlet coil of the first-stage condenser, a defogger is fixed to the ventilation pipe, a defogger is arranged in the defogger, a drain pipe is fixed to the bottom of the defogger, the bottom of the drain pipe is fixed to the discharge pipe, the non-condensable gas inlet pipe is fixed to the lower part of the defogger, valves are provided on the drain pipe and the oil drain pipe, which can remove water mist in the non-condensable gas discharged after spraying to prevent affecting subsequent condensation.

[0008] The utility model has the following beneficial effects:

[0009] Through the three-stage series-connected condenser, the non-condensable gas can be continuously condensed and recovered, and the oil and gas can be better recovered. A water inlet jacket is provided on the lower outer side of each stage of the condenser to cool the condenser tank and supply water to the condenser pipe in the condenser tank. In addition, the gas entering the condenser tank is distributed through the air inlet coil, and the gas distribution is more uniform, resulting in a better condensation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0011] Figure 2 It is a schematic diagram of the top structure of the air intake coil;

[0012] In the figure: 1. first-stage condenser; 2. second-stage condenser; 3. third-stage condenser; 4. cooling water outlet pipe; 5. condenser tank; 6. installation tube sheet; 7. condenser tube; 8. water inlet jacket; 9. air inlet coil; 10. cooling water inlet pipe; 11. demister; 12. non-condensable gas inlet pipe; 13. demister tank; 14. drain pipe; 15. oil drain pipe; 16. discharge pipe; 17. connecting pipe; 18. valve; 19. vent pipe; 20. distribution air holes. DETAILED DESCRIPTION

[0013] The utility model is further described below in conjunction with embodiments.

[0014] Embodiment 1, as Figures 1 to 2 As shown, the utility model is a three-stage condensation device for oil and gas, including a primary condenser 1, a secondary condenser 2 and a tertiary condenser 3. The primary condenser 1, the secondary condenser 2 and the tertiary condenser 3 all include a condensation tank body 5. A cooling water outlet pipe 4 is fixed to the top of each condensation tank body 5. An oil drain pipe 15 is fixed to the bottom of the condensation tank body 5. A mounting tube sheet 6 is fixed to the upper part of the condensation tank body 5. A plurality of condensation tubes 7 are evenly fixed on the mounting tube sheet 6. A water inlet jacket 8 is provided on the outer side of the lower part of the condensation tank body 5. The lower end of the condensation tube 7 passes through the condensation tank body 5. The body 5 is connected to the water inlet jacket 8, a cooling water inlet pipe 10 is fixed to the bottom of the water inlet jacket 8, a vortex-shaped air inlet coil 9 is fixed on the lower inner wall of the condensation tank body 5, the top of the air inlet coil 9 is evenly provided with distributed air holes 20, the air inlet coil 9 is connected to the non-condensable gas inlet pipe 12, an air outlet is provided on the upper part of the condensation tank body 5, the air outlet of the three-stage condenser 3 is connected to a negative pressure exhaust device, such as an exhaust fan, a connecting pipe 17 is provided between the second-stage condenser 2 and the first-stage condenser 1 and the third-stage condenser 3, and a discharge pipe 16 is fixed to the bottom of the oil drain pipe 15.

[0015] During operation, the non-condensable gas discharged after the oil and gas are sprayed by the spray tower enters the first-stage condenser 1 from the non-condensable gas inlet pipe 12, and then is evenly distributed through the air inlet coil 9, and then condensed through the condenser 7. A part of the gas in the non-condensable gas condenses out and then falls into the oil drain pipe 15, and then is discharged into the oil-water separation tank through the discharge pipe 16. The non-condensable gas discharged from the outlet of the first-stage condenser 1 enters the second-stage condenser 2 and the third-stage condenser 3 in turn for condensation.

[0016] Embodiment 2, based on embodiment 1, the distribution pores 20 are arranged to be inclined with the inner side lower and the outer side higher.

[0017] The air intake coil 9 is provided with a reinforcing rod.

[0018] The air inlet coil 9 of the primary condenser 1 is fixedly connected with a vent pipe 19, a demister 13 is fixed to the vent pipe 19, a demister 11 is arranged in the demister 13, a drain pipe 14 is fixed at the bottom of the demister 13, the bottom of the drain pipe 14 is fixed to the discharge pipe 16, the non-condensable gas inlet pipe 12 is fixed at the lower part of the demister 13, and valves 18 are arranged on the drain pipe 14 and the oil discharge pipe 15. The non-condensable gas discharged after the oil and gas is sprayed by the spray tower first enters the demister 13, then passes through the demister 11 to remove the water mist, and then the water droplets flow into the drain pipe 14, and then enter the oil-water separation tank through the discharge pipe 16.

[0019] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0020] In the description of the present invention, the terms "inside", "outside", "longitudinal", "lateral", "upper", "lower", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

Claims

1. An oil and gas three-stage condensation device, comprising a primary condenser (1), a secondary condenser (2) and a tertiary condenser (3), characterized in that: The first-stage condenser (1), the second-stage condenser (2) and the third-stage condenser (3) all include a condensation tank body (5), a cooling water outlet pipe (4) is fixed to the top of each condensation tank body (5), an oil drain pipe (15) is fixed to the bottom of each condensation tank body (5), a mounting tube sheet (6) is fixed to the upper part of the condensation tank body (5), a plurality of condensation tubes (7) are evenly fixed on the mounting tube sheet (6), a water inlet jacket (8) is provided on the outer side of the lower part of the condensation tank body (5), and the lower end of the condensation tube (7) passes through the condensation tank body (5) and is connected to the water inlet jacket. (8), a cooling water inlet pipe (10) is fixed to the bottom of the water inlet jacket (8), a vortex-shaped air inlet coil (9) is fixed to the lower inner wall of the condenser tank (5), the top of the air inlet coil (9) is evenly provided with distributed air holes (20), the air inlet coil (9) is connected to a non-condensable gas inlet pipe (12), an air outlet is provided at the top of the condenser tank (5), a connecting pipe (17) is provided between the secondary condenser (2) and the primary condenser (1) and the tertiary condenser (3), and a discharge pipe (16) is fixed to the bottom of the oil drain pipe (15).

2. The oil and gas three-stage condensation device according to claim 1, characterized in that: The distribution pores (20) are arranged to be inclined with the inner side lower and the outer side higher.

3. The oil and gas three-stage condensation device according to claim 1 is characterized in that: A reinforcing rod is provided on the air intake coil (9).

4. The oil and gas three-stage condensation device according to claim 1, characterized in that: A ventilation pipe (19) is fixedly connected to the air inlet coil (9) of the primary condenser (1), a demister (13) is fixed to the ventilation pipe (19), a demister (11) is arranged in the demister (13), a drain pipe (14) is fixed to the bottom of the demister (13), the bottom of the drain pipe (14) is fixed to the discharge pipe (16), a non-condensable gas inlet pipe (12) is fixed to the lower part of the demister (13), and valves (18) are arranged on the drain pipe (14) and the oil discharge pipe (15).

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