Skid-mounted VOCs compressor unit

Abstract

The utility model relates to the technical field of VOCs (Volatile Organic Compounds) collection, in particular to a skid-mounted VOCs compressor unit, which comprises a skid frame and a bottom skid arranged at the lower part of the skid frame, and is characterized in that a three-phase separator and a compressor which are communicated with each other are arranged on the bottom skid; a basket filter, a first pressure transmitter and a first temperature transmitter are arranged on the oil-gas inlet pipeline, and an outlet pipeline is arranged at the top of the three-phase separator. The compressor is connected with a motor through a coupler, and the compressor is connected with a circulating cooling system used for cooling the compressor. The compressor uses a circulating cooling system, oil gas inlet and outlet and circulating water heat exchange share a three-phase separator, the occupied area and public engineering types of similar equipment are reduced, and compared with a traditional compressor which is too high in use temperature and too large in size, the device is more compact in structure, saves space, is convenient to maintain and can meet the medium pressure and temperature requirements of a subsequent VOCs treatment process.

Description

Technical Field

[0001] The utility model relates to the technical field of VOCs collection, in particular to a skid-mounted VOCs compressor unit. Background Art

[0002] VOCs refer to organic compounds with a saturated vapor pressure greater than 70Pa at room temperature and a boiling point below 260°C at normal pressure, or all volatile organic compounds with a vapor pressure greater than or equal to 10Pa at 20°C. Its main components are hydrocarbons, sulfides, ammonia, etc.

[0003] In industry, the concentration of collected VOCs gas is too low, and the adjustable range of the output pressure is generally small, which cannot adapt to a variety of different pressure output situations, and cannot efficiently transport the VOCs gas to the oil and gas recovery device; and a large amount of heat is generated during the transportation process, and the system operating temperature is too high, affecting the medium pressure and temperature required for the VOCs gas treatment process. Summary of the invention

[0004] The purpose of the utility model is to provide a skid-mounted VOCs compressor unit to solve the problems raised in the above-mentioned background technology. The utility model has the advantages of efficiently transporting the collected VOCs to the oil and gas recovery device, and adopting water lubrication and water cooling processes, which can effectively reduce the working temperature and meet the medium pressure and temperature required by the VOCs treatment process.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a skid-mounted VOCs compressor unit, comprising a skid frame, the lower part of the skid frame is set as a bottom skid, a three-phase separator and a compressor that are interconnected are arranged on the bottom skid, an oil and gas inlet pipeline is connected to the compressor, a basket filter, a first pressure transmitter and a first temperature transmitter are arranged on the oil and gas inlet pipeline, an outlet pipeline is arranged on the top of the three-phase separator, a return air balance pipe is arranged between the outlet pipeline and the oil and gas inlet pipeline, one end of the return air balance pipe is connected to the oil and gas inlet pipeline between the first pressure transmitter and the first temperature transmitter, the outlet pipeline is connected to a subsequent processing system, a discharge pipeline is arranged at the bottom of the three-phase separator, and an oil discharge pipeline is arranged at the lower part of the cylinder of the three-phase separator;

[0006] The compressor is connected to a motor through a coupling, and the compressor is connected to a circulating cooling system for cooling the compressor. The compressor uses a circulating cooling system, and the oil and gas inlet and outlet and the circulating water heat exchange share a three-phase separator, which reduces the land occupation and types of public works of similar equipment. Compared with traditional compressors with high operating temperatures and large volumes, the device has a more compact structure, saves space, is easy to maintain, and can meet the medium pressure and temperature requirements of subsequent VOCs treatment processes.

[0007] As a further solution of the utility model, the circulating cooling system includes an internal circulation pipeline arranged between two circulating water ports of the compressor, the internal circulation pipeline is provided with internal circulation water, the internal circulation water is clean water, the internal circulation pipeline is provided with heat exchangers arranged in sequence along the flow direction of the internal circulation water and an internal circulation filter for filtering the internal circulation water, the heat exchanger is also provided with an external circulation inlet and an external circulation outlet, the external circulation inlet is connected to a water supply system of an external circulation water, the external circulation water is clean water, and the external circulation outlet is connected to a three-phase separator through an external circulation pipe. The internal circulation filter removes impurities generated by pipeline corrosion and oil and gas media during long-term operation, ensures the cleanliness of the internal circulation water before entering the compressor, and meets the long-term operation of the compressor. The external circulation water is clean water to ensure that no impurities are brought into the three-phase separator after entering.

[0008] As a further solution of the utility model, a pressure balancing pipe connected to the three-phase separator is provided on the internal circulation pipeline downstream of the internal circulation filter.

[0009] As a further solution of the utility model, the motor is a three-phase asynchronous motor, which is fixed to the bottom skid by bolts, and each bolt is provided with a shock-absorbing pad, which greatly reduces the running vibration.

[0010] As a further solution of the utility model, a sight glass and an oil discharge solenoid valve are sequentially arranged along the oil discharge direction of the oil discharge pipeline, which are used to discharge the liquid oil in the three-phase separator and are controlled by the liquid level transmitter on the three-phase separator.

[0011] As a further solution of the utility model, the three-phase separator is also provided with a liquid level transmitter controller, a second pressure transmitter and a second temperature transmitter.

[0012] As a further solution of the utility model, the compressor is provided with a water replenishment port, the water replenishment port is provided with a water replenishment pipeline, the water replenishment pipeline is connected to the external water supply system, the water replenishment pipeline is provided with a water replenishment solenoid valve, the water replenishment solenoid valve is opened and closed according to the second pressure transmitter and the second temperature transmitter on the three-phase separator, and is used for water replenishment before the first operation of the compressor. It is used for water replenishment before the first operation of the compressor and stable water replenishment during the operation of the compressor.

[0013] As a further solution of the utility model, the bottom skid is welded into a whole using channel steel, and a thick steel plate is welded on the welded channel steel. The lower part of the bottom skid is provided with reinforcing ribs distributed according to the installation position of the equipment. The bottom skid is provided with forklift holes on both sides, and anchor bolts are installed in the forklift holes. Four vertically arranged columns are provided on the bottom skid, and a ceiling with an inclined drainage is provided on the upper part of the four columns, and the ceiling is a thick steel plate installed by welding.

[0014] As a further solution of the utility model, the skid frame is provided with insulation boards around it, one side of which has an exhaust fan port, and the exhaust fan port is provided with an exhaust fan, and the inner layer of the board is provided with a sound-absorbing sticker and insulation cotton. It can prevent freezing in winter and dissipate heat through the exhaust fan in summer to ensure that the overall skid-mounted water cooling temperature is appropriate.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows: the device includes a three-phase separator and a compressor that are interconnected on a bottom skid, an oil and gas inlet pipeline is connected to the compressor, a basket filter, a first pressure transmitter and a first temperature transmitter are arranged on the oil and gas inlet pipeline, the compressor uses a circulating cooling system, and the oil and gas inlet and circulating water heat exchange share the three-phase separator, which reduces the land occupation and types of public works of similar equipment, and compared with traditional compressors with too high operating temperature and too large volume, the device has a more compact structure, saves space, is easy to maintain, and can meet the medium pressure and temperature requirements of subsequent VOCs treatment processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The overall assembly diagram of the utility model is shown in FIG. Figure 1 ;

[0017] Figure 2 The overall assembly diagram of the utility model is shown in FIG. Figure 2 ;

[0018] Figure 3 The overall assembly diagram of the utility model is shown in FIG. Figure 3 ;

[0019] Figure 4 It is the front view of the utility model.

[0020] In the figure: 1- bottom skid, 101- forklift hole, 102- column, 103- ceiling, 2- insulation board, 3- three-phase separator, 301- outlet pipeline, 311- second pressure transmitter, 312- second temperature transmitter, 302- oil drain pipeline, 321- sight glass, 322- oil drain solenoid valve, 303- discharge pipeline, 304- level transmitter controller, 4- oil and gas inlet pipeline, 401- basket filter, 402- first pressure transmitter, 403- first temperature transmitter, 5- compressor, 501- water supply pipeline, 511- water supply solenoid valve 6- coupling, 7- motor, 8- heat exchanger, 801- external circulation inlet, 802- internal circulation pipeline, 9- internal circulation filter, 10- pressure balance pipe, 11- return air balance pipe. DETAILED DESCRIPTION

[0021] 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 of 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.

[0022] Example 1

[0023] Please see attached Figure 1 -Attached Figure 4 A skid-mounted VOCs compressor unit comprises a skid frame, the lower part of the skid frame is set as a bottom skid 1, the bottom skid is welded into a whole by using channel steel, thick steel plates are welded on the welded channel steel, reinforcing ribs distributed according to the installation position of the equipment are arranged at the lower part of the bottom skid, forklift holes 101 are provided on both sides of the bottom skid, anchor bolts are installed in the forklift holes, four vertically arranged columns 102 are arranged on the bottom skid, a ceiling 103 with an inclined drainage is arranged on the upper part of the four columns, and the ceiling is a thick steel plate arranged by welding.

[0024] The skid frame is surrounded by an insulation board 2, one side of which has an exhaust fan port, and an exhaust fan is provided at the exhaust fan port. The inner layer of the board is provided with a sound-absorbing sticker and insulation cotton. It can prevent freezing in winter and dissipate heat through the exhaust fan in summer to ensure that the overall skid-mounted water cooling temperature is appropriate.

[0025] The bottom skid is provided with a three-phase separator 3 and a compressor 5 which are interconnected. The compressor is connected to a motor 7 through a coupling 6. The motor is a three-phase asynchronous motor. The three-phase asynchronous motor is fixed to the bottom skid by bolts. Each bolt is provided with a shock-absorbing pad. The three-phase asynchronous motor drives the compressor to open and close.

[0026] The compressor is connected to an oil and gas inlet pipeline 4, on which a basket filter 401, a first pressure transmitter 402 and a first temperature transmitter 403 are provided. VOCs oil and gas enter along the oil and gas inlet pipeline, are filtered by the basket filter, and are successively passed through the first pressure transmitter and the first temperature transmitter for real-time pressure and temperature measurement. After being compressed and heated by the compressor, the VOCs oil and gas enter the three-phase separator, where the liquid temperature is increased by heating, the collision opportunities of oil and water molecules are increased, and the specific gravity difference of oil and water is increased; small oil droplets and small water droplets have more opportunities to collide and aggregate into large oil droplets and large water droplets, accelerating the separation speed of oil and water; oil floats and water sinks to achieve oil and water separation. There is also a part of residual oil and gas mixed in the steam. The three-phase separator 3 is also provided with a liquid level transmitter controller 304, a second pressure transmitter 311 and a second temperature transmitter 312.

[0027] An outlet pipeline 301 is provided at the top of the three-phase separator, and the residual oil and gas are mixed in the steam and output from the outlet pipeline. A return gas balance pipe 11 is provided between the outlet pipeline and the oil and gas inlet pipeline, and one end of the return gas balance pipe is connected to the oil and gas inlet pipeline between the first pressure transmitter and the first temperature transmitter. The return gas balance pipe makes the pressure in the outlet pipeline and the oil and gas inlet pipeline always consistent, without pressure difference, and no additional resistance is generated during the oil and gas input and output process.

[0028] The outlet pipeline is connected to a subsequent treatment system, which includes a subsequent VOCs treatment process, and the residual oil and gas are treated again by the subsequent VOCs treatment process.

[0029] An oil drain pipeline 302 is provided at the lower part of the three-phase separator cylinder; a liquid level transmitter controller 304 on the three-phase separator monitors the liquid level in the three-phase separator in real time. When the separated liquid VOCs oil needs to be discharged, a sight glass 321 and an oil drain solenoid valve 322 are provided in sequence along the oil outlet direction on the oil drain pipeline 302. When the oil drain solenoid valve is opened, the liquid VOCs oil is discharged along the oil drain pipeline.

[0030] A discharge pipeline 303 is provided at the bottom of the three-phase separator. When the entire separation process is completed, the discharge pipeline is opened to discharge the waste liquid in the three-phase separator.

[0031] Embodiment 2

[0032] During the continuous use of the compressor, the temperature of the compressor is too high, so it is necessary to cool the compressor in time.

[0033] The compressor is connected to a circulating cooling system for cooling the compressor. The circulating cooling system includes an internal circulation pipeline 802 arranged between two circulating water ports of the compressor, and internal circulating water is arranged in the internal circulation pipeline. The internal circulating water is clean water. The internal circulation pipeline is provided with heat exchangers 8 arranged in sequence along the flow direction of the internal circulating water and internal circulation filters 9 for filtering the internal circulating water. The internal circulation filter filters impurities generated by pipeline corrosion and oil and gas media during long-term operation, ensuring that the clean internal circulating water enters the compressor circulation to meet the long-term operation of the compressor.

[0034] A pressure balance pipe 10 connected to the three-phase separator 3 is provided on the internal circulation pipeline downstream of the internal circulation filter 9 .

[0035] The heat exchanger is also provided with an external circulation inlet 801 and an external circulation outlet. The external circulation inlet is connected to a water supply system of external circulating water, and the external circulating water is clean water. The external circulation outlet is connected to the three-phase separator through an external circulation pipe. The clean water in the water supply system is supplied to the heat exchanger, and is heated up by heat exchange with the internal circulating water in the heat exchanger, and enters the three-phase separator to provide heat to the three-phase separator. In the three-phase separator, it is mixed with the residual oil and gas in the form of steam and evaporates upward, and is discharged along the outlet pipeline and transported to the subsequent VOCs treatment process for reuse.

[0036] Embodiment 3

[0037] After long-term operation of the compressor, the internal circulating water evaporates from the three-phase separator due to temperature reasons. The compressor is provided with a water replenishment port, and a water replenishment pipeline 501 is provided on the water replenishment port. The water replenishment pipeline is connected to the external water supply system, and a water replenishment solenoid valve 511 is provided on the water replenishment pipeline for replenishing water before the first operation of the compressor. The water replenishment solenoid valve is opened and closed according to the second pressure transmitter and the second temperature transmitter on the three-phase separator, and can also stably replenish water during the operation of the compressor.

[0038] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, so it is intended to include all changes in the meaning and scope of the equivalent elements of the claims in the utility model. Any figure mark in the claims should not be regarded as limiting the claims involved. Although the embodiments of the utility model have been shown and described, it is understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the utility model, and the scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A skid-mounted VOCs compressor unit, comprising a skid frame, the lower part of the skid frame being a bottom skid (1), characterized in that: A three-phase separator (3) and a compressor (5) are provided on the bottom skid, and an oil and gas inlet pipeline (4) is connected to the compressor. A basket filter (401), a first pressure transmitter (402) and a first temperature transmitter (403) are provided on the oil and gas inlet pipeline. An outlet pipeline (301) is provided on the top of the three-phase separator, and a return air balance pipe (11) is provided between the outlet pipeline and the oil and gas inlet pipeline. One end of the return air balance pipe is connected to the oil and gas inlet pipeline between the first pressure transmitter and the first temperature transmitter. The outlet pipeline is connected to a subsequent processing system. A discharge pipeline (303) is provided at the bottom of the three-phase separator, and an oil discharge pipeline (302) is provided at the lower part of the three-phase separator cylinder. The compressor is connected to a motor (7) via a coupling (6), and the compressor is connected to a circulating cooling system for cooling the compressor.

2. The skid-mounted VOCs compressor unit according to claim 1, characterized in that: The circulating cooling system comprises an internal circulation pipeline (802) arranged between two circulating water outlets of the compressor, wherein internal circulating water is arranged in the internal circulation pipeline, and the internal circulating water is clean water. The internal circulation pipeline is provided with a heat exchanger (8) and an internal circulation filter (9) for filtering the internal circulating water, which are arranged in sequence along the flow direction of the internal circulating water. The heat exchanger is also provided with an external circulation inlet (801) and an external circulation outlet, wherein the external circulation inlet is connected to a water supply system for external circulating water, and the external circulating water is clean water. The external circulation outlet is connected to a three-phase separator (3) through an external circulation pipe.

3. The skid-mounted VOCs compressor unit according to claim 2, characterized in that: A pressure balancing pipe (10) communicating with the three-phase separator is provided on the internal circulation pipeline downstream of the internal circulation filter.

4. The skid-mounted VOCs compressor unit according to claim 1, characterized in that: The motor is a three-phase asynchronous motor, which is fixed on the bottom skid by bolts, and each bolt is provided with a shock-absorbing pad.

5. The skid-mounted VOCs compressor unit according to claim 1, characterized in that: The oil discharge pipeline (302) is provided with a sight glass (321) and an oil discharge solenoid valve (322) in sequence along the oil discharge direction.

6. The skid-mounted VOCs compressor unit according to claim 1, characterized in that: The three-phase separator (3) is also provided with a liquid level transmitter controller (304), a second pressure transmitter (311) and a second temperature transmitter (312).

7. The skid-mounted VOCs compressor unit according to claim 1, characterized in that: The compressor (5) is provided with a water replenishment port, the water replenishment port is provided with a water replenishment pipeline (501), the water replenishment pipeline is connected to an external water supply system, the water replenishment pipeline is provided with a water replenishment solenoid valve (511), the water replenishment solenoid valve is opened and closed according to the second pressure transmitter and the second temperature transmitter on the three-phase separator, and is used for water replenishment before the compressor is operated for the first time.

8. The skid-mounted VOCs compressor unit according to claim 1, characterized in that: The bottom skid (1) is welded into an integral body using channel steels, and a thick steel plate is welded on the welded channel steels. The bottom skid is provided with reinforcing ribs distributed according to the installation position of the equipment. The bottom skid is provided with forklift holes (101) on both sides, and anchor bolts are installed in the forklift holes. The bottom skid is provided with four vertically arranged columns (102), and a ceiling (103) with an inclined drainage is provided on the top of the four columns. The ceiling is a thick steel plate welded.

9. The skid-mounted VOCs compressor unit according to claim 8, characterized in that: The skid frame is provided with a heat preservation plate (2) around it, wherein one side of the heat preservation plate has an exhaust fan opening, the exhaust fan opening is provided with an exhaust fan, and the inner layer of the plate is provided with a sound-absorbing sticker and heat preservation cotton.

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