阅读说明：本技术 一种裂解气压缩机注油注水系统以及去除聚合物方法 (Oil and water injection system of cracked gas compressor and method for removing polymers ) 是由 承勇 姚金星 马瑞 于 2020-06-09 设计创作，主要内容包括：本发明提供了一种裂解气压缩机注油注水系统以及去除聚合物方法,包括注水系统和注油系统,所述注水系统和注油系统均与裂解气压缩机内部相连通,所述注油系统的喷油嘴朝向裂解气压缩机的叶片表面,所述注水系统的喷水嘴朝向叶片出口和扩压器入口。本发明通过设置注水注油系统,注水和注油配合交替工作,一方面提升了裂解气压缩机的工作效率,同时能够及时消除裂解气压缩机内的聚合物,提高裂解气压缩机的使用寿命。(The invention provides a pyrolysis gas compressor oil and water injection system and a polymer removal method. According to the invention, the water injection and oil injection system is arranged, and water injection and oil injection are matched to alternately work, so that the working efficiency of the cracked gas compressor is improved, polymers in the cracked gas compressor can be eliminated in time, and the service life of the cracked gas compressor is prolonged.)

1. The utility model provides a pyrolysis gas compressor oiling water injection system which characterized in that: the device comprises a water injection system and an oil injection system, wherein the water injection system and the oil injection system are communicated with the interior of a cracked gas compressor, an oil nozzle of the oil injection system faces the surface of a blade of the cracked gas compressor, and a water spray nozzle of the water injection system faces the outlet of the blade of the cracked gas compressor and the inlet of a diffuser of the cracked gas compressor.

2. The oil and water injection system of the cracked gas compressor as claimed in claim 1, wherein: the water injection system includes two (5) bases, two (6) of electric heat tracing system, water injection module (7), send water module (8) and admission line (9) all set up at two (5) upper surfaces of bases, send water module (8) one end intercommunication water source, other end intercommunication water injection module (7), water injection module (7) lead to the pyrolysis gas compressor, two (6) of electric heat tracing system include switch board and heat tracing area, the switch board is connected with the heat tracing area, and the heat tracing area is with water injection module (7) and send the pipeline lateral wall fixed connection on the water module (8).

3. The oil and water injection system of the cracked gas compressor as claimed in claim 2, wherein: and the water delivery module (8) comprises a thermal expansion valve (81), a Y-shaped filter II (82), a pneumatic ball valve II (83) and a water delivery pipeline, and the pneumatic ball valve II (83), the Y-shaped filter II (82) and the thermal expansion valve (81) are sequentially and fixedly arranged on the water delivery pipeline along the water flow direction.

4. The oil and water injection system of the cracked gas compressor as claimed in claim 3, wherein: the water injection module (7) comprises a pressure gauge I (11), a forged steel gate valve I (12), a check valve I (13), a flowmeter (14), a needle valve (15), a pneumatic flow regulating valve (16), a flow transmitter II (17), a water nozzle and a water injection pipeline, the flow transmitter II (17), the pneumatic flow regulating valve (16), the needle valve (15), the flowmeter (14), the check valve I (13) and the water nozzle are sequentially connected in series along the water flow direction through a water injection pipeline, the first pressure gauge (11) is connected between the flowmeter (14) and the first check valve (13) through a first forged steel gate valve (12), the left end and the right end of the pneumatic flow regulating valve (16) are respectively communicated with a forged steel gate valve I (12) to form a first water channel and a second water channel, the second waterway is arranged in parallel with the waterway, a needle valve (15) is arranged on the second waterway, the pneumatic flow regulating valve (16) is communicated with the air inlet pipeline (9).

5. The oil and water injection system of the cracked gas compressor as claimed in claim 1, wherein: the oil injection system includes that electric heat tracing system (1), base (2), oiling module (3) and oil feeding module (4), electric heat tracing system (1), oiling module (3) and oil feeding module (4) all fix the setting on base (2), oil feeding module (4) one end intercommunication oil, other end intercommunication oiling module (3), pyrolysis gas compressor is access to in oiling module (3), electric heat tracing system (1) is including switch board and heat tracing band, the switch board is connected with the heat tracing band, heat tracing band and oiling module (3) and the pipeline lateral wall fixed connection on the oil feeding module (4).

6. The oil and water injection system of the cracked gas compressor as claimed in claim 5, wherein: the oil delivery module comprises a first flow transmitter (41), a first Y-shaped filter (42), a first pneumatic ball valve (43) and an oil delivery pipeline, wherein the first pneumatic ball valve (43), the first Y-shaped filter (42) and the first flow transmitter (41) are sequentially and fixedly arranged on the oil delivery pipeline along the water flow direction.

7. The cracked gas compressor oil and water injection system as claimed in claim 6, wherein: the oil injection module (3) comprises a second pressure gauge (21), a second forged steel gate valve (22), a rotor flow meter (23), a pressure regulating valve (24), a second check valve (25), an oil nozzle and an oil injection pipeline, the second forged steel gate valve (22), the pressure regulating valve (24), the rotor flow meter (23), the second check valve (25) and the oil nozzle are sequentially connected in series along the flowing direction of oil through the oil injection pipeline, and the second pressure gauge (21) is connected between the rotor flow meter (23) and the second check valve (25) through the second precision forged gate valve (22).

8. A method of polymer removal using the cracked gas compressor oil injection system of claim 1, comprising the steps of:

the method comprises the following steps: when the cracking gas compressor works, the water injection system simultaneously starts to inject water, and the water is atomized by the water spray nozzle and then injected into the blade outlet and the diffuser inlet;

step two: after six days of continuous water injection, switching an oil injection system to start oil injection, wherein the oil injection time is 24 hours;

step three: and after the oil injection is finished, switching the water injection system to start water injection so as to circulate the step one and the step two.

9. The oil and water injection system of the cracked gas compressor and the polymer removal method of the cracked gas compressor as claimed in claim 8, wherein: the water injected in the first step is desalted, softened and filtered, the water temperature is 20-40 ℃, the oxygen content is less than or equal to 0.15mg/L, and the aperture of the water spray nozzle is less than 0.1 mm; and the oil injected in the step two is hydrogenated gasoline, and the injection amount of the oil is 3% of the mass flow of the pyrolysis gas.

10. The oil and water injection system of the cracked gas compressor and the polymer removal method of the cracked gas compressor as claimed in claim 8, wherein: in the first step, corrosion inhibitor is injected while water is injected, and in the second step, polymerization inhibitor is injected while oil is injected.

Technical Field

The invention relates to the technical field of oil injection and water injection, in particular to the technical field of oil injection and water injection systems of cracking gas compressors and a method for removing polymers.

Background

At present, in the production and preparation of ethylene, a pyrolysis gas compressor is important equipment for ethylene production, and butadiene and styrene in the pyrolysis gas are easy to polymerize at high temperature to form polymers, and the polymers can be adhered to blades of the compressor, so that the performance and the service life of the pyrolysis gas compressor are influenced.

For example, chinese patent "CN 107973264A" discloses an automatic oil injection system, including oiling device and waiting oiling device, oiling device includes the oil conservator, aerating device and oil supplementing device, wherein, the oil conservator includes upper cavity and lower cavity, wait oiling device including waiting oiling device, the oil conservator with wait oiling device and link to each other through first pipeline, aerating device passes through the second pipeline and links to each other with upper cavity, in order to inject gas into upper cavity, oil supplementing device passes through the third pipeline and links to each other with lower cavity, in order to inject oil into lower cavity, the volume of upper cavity is along with the reduction of the oil mass of lower cavity and increase, the internal pressure of upper cavity reduces simultaneously, oiling device still includes oil filter and switching device installed on first pipeline. However, small amounts of diolefins are entrained during oil injection, which tends to exacerbate polymer formation.

Disclosure of Invention

In order to solve the problem that a small amount of alkadiene is brought in during oil injection in the prior art and the formation of a polymer is easily aggravated, the invention provides an oil and water injection system of a pyrolysis gas compressor and a method for removing the polymer.

The invention realizes the aim through the following technical scheme: the utility model provides a pyrolysis gas compressor oiling water injection system, includes water injection system and oil injection system, water injection system and oil injection system all are linked together with pyrolysis gas compressor is inside, the oil nozzle of oil injection system is towards the blade surface of pyrolysis gas compressor, the water spray nozzle of water injection system is towards blade export and diffuser entry.

On the basis, the water injection system comprises a second base, a second electric tracing system, a water injection module, a water delivery module and an air inlet pipeline, wherein the second electric tracing system, the water injection module, the water delivery module and the air inlet pipeline are all arranged on the upper surface of the second base, one end of the water delivery module is communicated with a water source, the other end of the water delivery module is communicated with the water injection module, the water injection module is communicated with the pyrolysis gas compressor, the second electric tracing system comprises a control cabinet and a tracing band, the control cabinet is connected with the tracing band, and the tracing band is fixedly connected with the water injection module and the side wall of a pipeline on the water delivery module.

On the basis, the water delivery module comprises a thermal expansion valve, a Y-shaped filter II, a pneumatic ball valve II and a water delivery pipeline, wherein the pneumatic ball valve II, the Y-shaped filter II and the thermal expansion valve are sequentially and fixedly arranged on the water delivery pipeline along the water flow direction.

On this basis, the water injection module includes manometer one, forged steel gate valve one, check valve one, flowmeter, needle valve, pneumatic flow control valve, flow transmitter two, water spout and water injection pipeline, flow transmitter two, pneumatic flow control valve, needle valve, flowmeter, check valve one and water spout establish ties along the water flow direction in proper order through the water injection pipeline, manometer one inserts between flowmeter and the check valve one through forged steel gate valve one, pneumatic flow control valve controls both ends and respectively communicates and has one forged steel gate valve one formation water route one, still includes water route two, water route two arranges with a water route parallel, be provided with needle valve on the water route two, pneumatic flow control valve is linked together with the admission line.

On the basis, the oil injection system comprises an electric heat tracing system, a first base, an oil injection module and an oil delivery module, wherein the electric heat tracing system, the oil injection module and the oil delivery module are fixedly arranged on the first base, one end of the oil delivery module is communicated with an oil product, the other end of the oil delivery module is communicated with the oil injection module, the oil injection module is communicated with the cracking gas compressor, the electric heat tracing system comprises a control cabinet and a heat tracing band, the control cabinet is connected with the heat tracing band, and the heat tracing band is fixedly connected with the oil injection module and the side wall of a pipeline on the oil delivery module.

On the basis, the oil delivery module comprises a first flow transmitter, a first Y-shaped filter, a first pneumatic ball valve and an oil delivery pipeline, wherein the first pneumatic ball valve, the first Y-shaped filter and the first flow transmitter are sequentially and fixedly arranged on the oil delivery pipeline along the water flow direction.

On the basis, the oil injection module comprises a second pressure gauge, a second forged steel gate valve, a second rotor flow meter, a pressure regulating valve, a second check valve, an oil nozzle and an oil injection pipeline, the second forged steel gate valve, the pressure regulating valve, the second rotor flow meter, the second check valve and the oil nozzle are sequentially connected in series along the flow direction of oil through the oil injection pipeline, and the second pressure gauge is connected between the second rotor flow meter and the second check valve through the second precision forged gate valve.

A method for removing polymers by adopting a cracked gas compressor oil injection and water injection system comprises the following steps:

the method comprises the following steps: when the cracking gas compressor works, the water injection system simultaneously starts to inject water, and the water is atomized by the water spray nozzle and then injected into the blade outlet and the diffuser inlet;

step two: after six days of continuous water injection, switching an oil injection system to start oil injection, wherein the oil injection time is 24 hours;

step three: and after the oil injection is finished, switching the water injection system to start water injection so as to circulate the step one and the step two.

On the basis, the water injected in the step one is subjected to desalination softening and filtration treatment, the water temperature is 20-40 ℃, the oxygen content is less than or equal to 0.15mg/L, and the pore diameter of the water spray nozzle is less than 0.1 mm; and the oil injected in the step two is hydrogenated gasoline, and the injection amount of the oil is 3% of the mass flow of the pyrolysis gas.

On the basis, in the first step, the corrosion inhibitor is injected while injecting water, and in the second step, the polymerization inhibitor is injected while injecting oil.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, the water injection and oil injection system is arranged, and water injection and oil injection are matched to alternately work, so that on one hand, the working efficiency of the cracked gas compressor is improved, meanwhile, polymers in the cracked gas compressor can be eliminated in time, and the service life of the cracked gas compressor is prolonged;

according to the invention, by controlling the injected water quality and the size of water drops and adding the corrosion inhibitor, the corrosion of water to the cracked gas compressor is effectively reduced, the cooling effect of water is better, the cracked gas compressor approaches to isothermal compression, the cooling effect is better, and the power consumption is lower;

the invention sprays oil on the surface of the blade to form a layer of oil film on the surface of the blade, finishes washing the blade and washes out the polymer.

Drawings

FIG. 1 is a schematic view of the oiling system of the present invention;

FIG. 2 is a schematic view of the oiling module of the present invention;

FIG. 3 is a schematic diagram of the water injection system of the present invention;

FIG. 4 is a schematic structural view of a water injection module of the present invention;

FIG. 5 is a schematic view of the structure of the access line of the present invention;

in the figure: 1. the electric heat tracing system comprises a first electric heat tracing system, a second electric heat tracing system, a first base, a second electric heat tracing system, a second base, a.

Detailed Description

The present invention will be described in further detail with reference to the following drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1-5, the present invention schematically illustrates a cracked gas compressor oil injection and water injection system and a polymer removal method.

As shown in fig. 1-5, the invention discloses an oil and water injection system for a cracked gas compressor, which comprises a water injection system and an oil injection system, wherein the water injection system and the oil injection system are both communicated with the interior of the cracked gas compressor, an oil nozzle of the oil injection system faces the surface of a blade of the cracked gas compressor, and a water nozzle of the water injection system faces an outlet of the blade and an inlet of a diffuser.

Preferably, the diameter of the water nozzle is less than 0.1mm, so that water can be vaporized rapidly after being sprayed out, and the water is prevented from being stuck on the equipment.

As shown in fig. 3, the water injection system comprises a second base 5, a second electric heat tracing system 6, a water injection module 7, a water delivery module 8 and an air inlet pipeline 9, the second electric heat tracing system 6, the water injection module 7, the water delivery module 8 and the air inlet pipeline 9 are all arranged on the upper surface of the second base 5, one end of the water delivery module 8 is communicated with a water source, the other end of the water delivery module 8 is communicated with the water injection module 7, the water injection module 7 is communicated with the pyrolysis gas compressor, the second electric heat tracing system 6 comprises a control cabinet and a heat tracing band, the control cabinet is connected with the heat tracing band, and the heat tracing band is fixedly connected with the side walls of the pipelines on the water injection module 7. The electric heat tracing system is adopted, the required energy consumption is low, the liquid in the pipeline is effectively prevented from being frozen, and meanwhile, the liquid in the pipeline can be maintained to keep a stable temperature. The water supply module 8 comprises a thermal expansion valve 81, a Y-shaped filter II 82, a pneumatic ball valve II 83 and a water supply pipeline, wherein the pneumatic ball valve II 83, the Y-shaped filter II 82 and the thermal expansion valve 81 are sequentially and fixedly arranged on the water supply pipeline along the water flow direction. The water is pre-filtered by the second Y-shaped filter 82, so that the pipeline is prevented from being blocked by impurities.

As shown in fig. 4, the number of the water injection modules 7 is a plurality, the water injection modules 7 are arranged in parallel, each water injection module 7 leads to different compression regions of the pyrolysis gas compressor, each water injection module 7 comprises a first pressure gauge 11, a first forged steel gate valve 12, a first check valve 13, a flowmeter 14, a needle valve 15, a pneumatic flow control valve 16, a second flow transmitter 17, a water nozzle and a water injection pipeline, the second flow transmitter 17, the pneumatic flow control valve 16, the needle valve 15, the flowmeter 14, the first check valve 13 and the water nozzle are sequentially connected in series along the water flow direction through the water injection pipeline, the first pressure gauge 11 is connected between the flowmeter 14 and the first check valve 13 through the first forged steel gate valve 12, the first forged steel gate valve 12 is respectively communicated with the left end and the right end of the pneumatic flow control valve 16 to form a first water channel, the second water channel is also connected with the first water channel, and a needle valve 15 is arranged on the water channel II, and the pneumatic flow control valve 16 is communicated with the air inlet pipeline 9. Through setting up manometer one 11 and flowmeter 14, can observe the pressure and the flow of injected water in real time, through arranging water route one and two parallelly connected of water route, water route one can be through pneumatic automatic control flow, and water route two can be through manual control flow, avoids personnel's frequent operation on the one hand, reduces intensity of labour, and on the other hand can in time carry out manual control when automatic control became invalid. The first check valve 13 can prevent liquid from flowing back to cause pollution to pipelines of the water injection system.

Preferably, a forged steel gate valve 12 is vertically connected between the flowmeter 14 and the check valve 13, the other end of the forged steel gate valve 12 is communicated with the corrosion inhibitor, and the forged steel gate valve 12 is in an open state during water injection.

As shown in fig. 1, the oil injection system comprises an electric heat tracing system 1, a first base 2, an oil injection module 3 and an oil delivery module 4, wherein the electric heat tracing system 1, the oil injection module 3 and the oil delivery module 4 are all fixedly arranged on the first base 2, one end of the oil delivery module 4 is communicated with an oil product, the other end of the oil delivery module is communicated with the oil injection module 3, the oil injection module 3 leads to the cracked gas compressor, the electric heat tracing system 1 comprises a control cabinet and a heat tracing band, the control cabinet is connected with the heat tracing band, and the heat tracing band is fixedly connected with the oil injection module 3 and the pipeline side wall on the oil delivery module 4. The oil delivery module comprises a first flow transmitter 41, a first Y-shaped filter 42, a first pneumatic ball valve 43 and an oil delivery pipeline, wherein the first pneumatic ball valve 43, the first Y-shaped filter 42 and the first flow transmitter 41 are sequentially and fixedly arranged on the oil delivery pipeline along the water flow direction.

As shown in fig. 2, the number of the oil injection modules 3 is a plurality, the oil injection modules 3 are arranged in parallel, each oil injection module 3 leads to different compression sections of the cracked gas compressor, and each oil injection module 3 comprises a second pressure gauge 21, a second forged steel gate valve 22, a rotor flow meter 23, a pressure regulating valve 24, a second check valve 25, an oil nozzle and an oil injection pipeline. The forged steel gate valve II 22, the pressure regulating valve 24, the rotor flow meter 23, the check valve II 25 and the oil nozzle are sequentially connected in series along the oil flow direction through the oil injection pipeline, and the pressure gauge II 21 is connected between the rotor flow meter 23 and the check valve II 25 through the finish forged gate valve II 22. The second check valve 25 can prevent liquid from flowing back to cause the pollution of the pipeline of the oil injection system. The second pressure gauge 21 and the rotameter 23 can display the oil pressure and flow in the pipeline in real time.

Preferably, a forged steel gate valve II 22 is vertically connected between the rotor flowmeter 23 and the check valve II 25, the other end of the forged steel gate valve II 22 is communicated with a polymerization inhibitor, and the forged steel gate valve II 22 is in an open state during oil injection.

Various components and pipes in this embodiment are connected as shown in fig. 5, and include nut 111, stud 112, winding pad 113 and flange 114, the end of the component and the end of the pipe are all welded and fixed with a flange 114, the flanges 114 are arranged oppositely, winding pad 113 is placed between two flanges 114, stud 112 passes through two flanges 114 simultaneously, nut 111 is fixed at two ends of stud 112, and tightening nut 111 makes flanges 114 mutually attached, thereby realizing the fixed communication between the component and the pipe.

Preferably, the upper surfaces of the first base 2 and the second base 5 are concave structures, so that liquid is prevented from flowing into the ground at the first time when the liquid leaks, and meanwhile, the first base 2 and the second base 5 are filled with flame retardants, so that fire hazard is reduced.

A method for removing polymers by adopting a cracked gas compressor oil injection and water injection system comprises the following steps:

the method comprises the following steps: when the cracking gas compressor works, the water injection system simultaneously starts to inject water, and the water is atomized by the water spray nozzle and then injected into the blade outlet and the diffuser inlet;

step two: after six days of continuous water injection, switching an oil injection system to start oil injection, wherein the oil injection time is 24 hours;

step three: and after the oil injection is finished, switching the water injection system to start water injection so as to circulate the step one and the step two.

Preferably, the injected water is desalted, softened and filtered, the water temperature is 20-40 ℃, and the oxygen content is less than or equal to 0.15 mg/L. To the water quality optimization, avoided the incrustation scale to block up the water spout on the one hand, on the other hand has reduced the corruption of water to equipment by a wide margin.

Preferably, the injected oil is hydrogenated gasoline, the injection amount of the oil is 3% of the mass flow of the pyrolysis gas, and the hydrogenated gasoline can prevent the oil from generating a polymerization reaction.

Preferably, in the step one, after 6 hours from the beginning of water injection, the forged steel gate valve I12 communicated with the corrosion inhibitor is opened, the corrosion inhibitor is injected at the same time, and 6 hours before the end of water injection, the forged steel gate valve I12 is closed, and the injection of the corrosion inhibitor is stopped; and in the second step, after 6 hours from the start of oil injection, opening the forged steel gate valve II 22 communicated with the polymerization inhibitor, simultaneously injecting the polymerization inhibitor, closing the forged steel gate valve II 22 6 hours before the end of oil injection, and stopping injecting the polymerization inhibitor. After 6 hours of water injection or oil injection, the corrosion inhibitor and the polymerization inhibitor are added, so that only a single liquid exists in the equipment, and the problem that water and the polymerization inhibitor and oil and the corrosion inhibitor are insoluble is avoided.

While the foregoing description shows and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as described herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.