阅读说明：本技术 一种轻烃油制气装置 (Light hydrocarbon oil gas making device ) 是由 王景刚 熊楚超 罗景辉 侯立泉 魏莹 刘欢 孟志群 祁佳雯 于 2020-07-21 设计创作，主要内容包括：本发明公开了一种轻烃油制气装置,它应用于燃气制备领域,其包括汽化器、与所述汽化器连接的供气装置和与所述汽化器连接的供油装置,所述汽化器内设有轻烃油,所述轻烃油内设有与蒸汽发生器连接的冷凝器,轻烃油液面的上方设有挡液孔板,所述汽化器的顶部与抽气管连接,汽化器的底部与排污口连接；本发明设计新颖,布局合理,能量利用率高,制气量调节范围大,利用自身制造的轻烃燃气驱动制气装置,减少了其它方式的加热需求,合理利用了轻烃资源,避免高品位能源的消耗,其制得的轻烃气的稳定性好,制气质量有保证,可能满足不同用户的多种需求,有大力推广的必要。(The invention discloses a light hydrocarbon oil gas making device, which is applied to the field of gas preparation and comprises a vaporizer, a gas supply device connected with the vaporizer and an oil supply device connected with the vaporizer, wherein light hydrocarbon oil is arranged in the vaporizer, a condenser connected with a steam generator is arranged in the light hydrocarbon oil, a liquid blocking hole plate is arranged above the liquid level of the light hydrocarbon oil, the top of the vaporizer is connected with an exhaust pipe, and the bottom of the vaporizer is connected with a sewage outlet; the invention has novel design, reasonable layout, high energy utilization rate and large gas production regulating range, utilizes the self-made light hydrocarbon gas to drive the gas production device, reduces the heating requirements of other modes, reasonably utilizes light hydrocarbon resources, avoids the consumption of high-grade energy, has good stability of the produced light hydrocarbon gas, ensures the gas production quality, can meet various requirements of different users, and has the need of vigorous popularization.)

1. A light hydrocarbon oil gas making device comprises a vaporizer (24), a gas supply device connected with the vaporizer (24) and an oil supply device connected with the vaporizer (24), and is characterized in that: the device is characterized in that light hydrocarbon oil is arranged in the vaporizer (24), a condenser (21) connected with the steam generator (30) is arranged in the light hydrocarbon oil, a liquid blocking hole plate (22) is arranged above the liquid level of the light hydrocarbon oil, the top of the vaporizer (24) is connected with the air extraction pipe (25), and the bottom of the vaporizer (24) is connected with the sewage outlet (17).

2. The light hydrocarbon oil-to-gas plant of claim 1, wherein: the air supply device comprises an air inlet (1), a Roots blower (2), an air buffer preheater (3) and an air distributor (5) which are connected in sequence through an air inlet pipe, wherein the air distributor (5) is arranged below a condenser (21) in a vaporizer (24).

3. The light hydrocarbon oil-to-gas plant of claim 2, wherein: and a flow speed regulating valve (4) is arranged on an air inlet pipe connected with the air distributor (5) and the air buffer preheater (3).

4. The light hydrocarbon oil-to-gas plant of claim 1, wherein: the oil supply device comprises an oil storage tank (6), an oil pump (8) and an oil preheater (9) which are sequentially connected through an oil pipe, wherein the oil preheater (9) is connected with the lower part of the vaporizer (24) through an oil supplementing regulating valve (10).

5. The light hydrocarbon oil-to-gas plant of claim 1, wherein: the steam generator (30) is connected with an inlet of the condenser (21) and an inlet of the air buffer preheater (3) through a proportion adjusting valve (26), an outlet of the condenser (21) is connected with an inlet of the air buffer preheater (3), an outlet of the air buffer preheater (3) is connected with an inlet of the evaporator (18) through a working medium throttle valve (19), and an outlet of the evaporator (18) is connected with the absorber (14).

6. The light hydrocarbon oil-to-gas plant of claim 5, wherein: and an oil preheater (9) is arranged at the lower part of the absorber (14).

7. The light hydrocarbon oil-to-gas plant of claim 5, wherein: the device is characterized in that a lithium bromide solution (32) is arranged in the steam generator (30), a hearth (12) is arranged below the lithium bromide solution (32), the hearth (12) is respectively connected with a gas storage tank (11) and an air flue gas heat exchanger (16), and the air flue gas heat exchanger (16) is connected with a gas inlet of an evaporator (18).

8. The light hydrocarbon oil-to-gas plant of claim 7, wherein: the lithium bromide solution (32) is connected with a liquid inlet of the absorber (14) through the solution heat exchanger (13) and the throttle valve (15) in sequence, and a liquid outlet of the absorber (14) is connected with the steam generator (30) through the solution pump (7) and the solution heat exchanger (13) in sequence.

9. The light hydrocarbon oil-to-gas plant of claim 1, wherein: be equipped with oxygen analysis appearance (23), droplet separator (27) and surge tank (28) on exhaust tube (25) in proper order, oxygen analysis appearance (23) are connected with air buffer preheater (3), the end of giving vent to anger of exhaust tube (25) is connected with gas holder (11) and light hydrocarbon export (33) respectively.

10. The light hydrocarbon oil-to-gas plant of claim 9, wherein: and the extraction pipe (25) is also provided with a pressure regulating valve (29) and a heat value analyzer (31).

Technical Field

The invention relates to the field of fuel gas preparation, in particular to a light hydrocarbon oil gas preparation device.

Background

The light hydrocarbon oil has wide source and great yield, and is an associated byproduct (alkane mixture with C5 and C6 as main components) in the production process of oil fields, gas fields, natural gas purification plants and the like. Because the light hydrocarbon oil has low boiling point, is easy to gasify and has explosion risk, the light hydrocarbon oil is usually separated in the petrochemical and oil refining industries, and light hydrocarbon resources are not fully utilized.

Through light hydrocarbon gas generating device, adopt the physical gasification mode, can change liquid light hydrocarbon into light hydrocarbon gas. The light hydrocarbon gas is clean fuel like natural gas, and has the advantages of high heat value, safety, environmental protection, convenient use, moderate price and the like. For remote areas with difficult natural gas pipe network transmission and distribution and construction, a light gas gasification station can be constructed in each village, and light hydrocarbon gas is sent to each household through a village pipe network, so that the problem of heating is solved.

The process of producing light hydrocarbon gas usually adopts a bubbling gas production method, which is a dynamic evaporation process, i.e. a large amount of air is sent into light hydrocarbon oil by a Roots blower to be gasified. A large amount of air bubbles are formed in the liquid, and volatile components which are easy to gasify in the light hydrocarbon oil enter the bubbles due to concentration difference between gas phase and liquid phase. The mass transfer process is carried out in the process that the bubbles escape from the liquid level, and light hydrocarbon air-mixed gas with certain concentration is formed after the bubbles rush out of the liquid level. With the need of absorbing heat from the outside during the gasification of light hydrocarbon oil, a conventional gasification device usually includes a heating device disposed outside the vaporization tank, and the purpose of gasifying light hydrocarbon oil is achieved by heating hot water through electric heating or gas combustion.

The heating area is not enough under the condition that the gas production amount is increased, the heating load can not meet the gas production requirement, and the adjustable range of the gas production equipment is smaller. And a large amount of electric energy resources can be consumed by adopting electric heating, and the utilization rate of gas heat energy needs to be improved by adopting gas furnace equipment for heating. There is a need to develop a new light hydrocarbon gas-producing device.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a light hydrocarbon oil gas making device, which drives a gas making device to operate by light hydrocarbon oil gas, utilizes the heat released by phase change of a working medium to meet the requirement of light hydrocarbon oil gas making, and improves the gas production capacity of a gas making system and the overall energy utilization rate of the device.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

the invention comprises a vaporizer, an air supply device connected with the vaporizer and an oil supply device connected with the vaporizer, wherein light hydrocarbon oil is arranged in the vaporizer, a condenser connected with a steam generator is arranged in the light hydrocarbon oil, a liquid blocking hole plate is arranged above the liquid level of the light hydrocarbon oil, the top of the vaporizer is connected with an air exhaust pipe, and the bottom of the vaporizer is connected with a sewage draining outlet.

The invention is further improved in that: the air supply device comprises an air inlet, a Roots blower, an air buffer preheater and an air distributor which are sequentially connected through an air inlet pipe, wherein the air distributor is arranged below a condenser in the vaporizer.

The invention is further improved in that: and a flow speed regulating valve is arranged on an air inlet pipe connected with the air distributor and the air buffer preheater.

The invention is further improved in that: the oil supply device comprises an oil storage tank, an oil pump and an oil preheater which are sequentially connected through an oil pipe, and the oil preheater is connected with the lower part of the vaporizer through an oil supplementing regulating valve.

The invention is further improved in that: the steam generator is respectively connected with an inlet of the condenser and an inlet of the air buffer preheater through the proportion regulating valve, an outlet of the condenser is connected with an inlet of the air buffer preheater, an outlet of the air buffer preheater is connected with an inlet of the evaporator through the working medium throttle valve, and an outlet of the evaporator is connected with the absorber.

The invention is further improved in that: and an oil preheater is arranged at the lower part of the absorber.

The invention is further improved in that: the lithium bromide solution is arranged in the steam generator, a hearth is arranged below the lithium bromide solution, the hearth is respectively connected with the air storage tank and the air flue gas heat exchanger, and the air flue gas heat exchanger is connected with an air inlet of the evaporator.

The invention is further improved in that: the lithium bromide solution is connected with the liquid inlet of the absorber through the solution heat exchanger and the throttle valve in sequence, and the liquid outlet of the absorber is connected with the steam generator through the solution pump and the solution heat exchanger in sequence.

The invention is further improved in that: the gas extraction pipe is sequentially provided with an oxygen analyzer, a droplet separator and a pressure stabilizing tank, the oxygen analyzer is connected with the air buffer preheater, and the gas outlet end of the gas extraction pipe is respectively connected with the gas storage tank and the light hydrocarbon outlet.

The invention is further improved in that: and the exhaust pipe is also provided with a pressure regulating valve and a heat value analyzer.

Due to the adoption of the technical scheme, the invention has the beneficial effects that:

the invention has novel design, reasonable layout, high energy utilization rate and large gas making quantity adjusting range, utilizes working medium in the condenser arranged in the vaporizer to condense and release a large amount of latent heat, and couples the latent heat with heat required by the gasification of light hydrocarbon oil, thereby meeting the heat requirement of larger gas making quantity and greatly improving the gas making efficiency. The light hydrocarbon gas produced by the gas producer is used for driving the gas producer, so that the heating requirements of other modes are reduced, light hydrocarbon resources are reasonably utilized, and the consumption of high-grade energy is avoided.

The device passes through light hydrocarbon gas combustion drive gas making device, when utilizing the heat of burning, still uses the flue gas waste heat to heat light hydrocarbon gas combustion and the air that the gas making needs. And further exchange heat with the circulating working medium in the evaporator, so that the temperature of the flue gas is reduced, and the utilization efficiency of the fuel gas is improved.

Raw oil and air required by gasification of the device are preheated and then sent into a vaporizer to produce gas. The outdoor air and the working medium exchange heat in the condenser to absorb the latent heat of condensation, and the light hydrocarbon oil absorbs the solution heat of the solution in the absorber to preheat. The main gasification heat is provided by a condenser in the vaporizer, and a bypass is additionally arranged, so that the gas making adjustability of the equipment is improved. The prepared light hydrocarbon gas has good stability and guaranteed gas preparation quality, and can meet various requirements of different users.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Wherein, 1, an air inlet; 2. a Roots blower; 3. an air buffer preheater; 4. a flow rate regulating valve; 5. an air distributor; 6. an oil storage tank; 7. a solution pump; 8. an oil pump; 9. an oil preheater; 10. an oil-supplementing regulating valve; 11. a gas storage tank; 12. light hydrocarbon gas combustion hearth; 13. a solution heat exchanger; 14. an absorber; 15. a throttle valve; 16. an air-flue gas heat exchanger; 17. a sewage draining outlet; 18. an evaporator; 19. a working medium throttle valve; 20. a flue gas outlet; 21. a condenser; 22. a liquid-blocking orifice plate; 23. an oxygen analyzer; 24. a vaporizer; 25. an air exhaust pipe; 26. a proportional regulating valve; 27. a droplet separator; 28. a surge tank; 29. a pressure regulating valve; 30. a steam generator; 31. a calorific value analyzer; 32. a lithium bromide solution; 33. and (5) light hydrocarbon outlet.

Detailed Description

The present invention will be described in further detail with reference to the following examples:

a light hydrocarbon oil gas making device comprises a vaporizer 24 with light hydrocarbon oil arranged inside, an air supply device connected with the vaporizer 24 and an oil supply device connected with the vaporizer 24, wherein liquid light hydrocarbon oil can be converted into clean fuel light hydrocarbon gas through a physical gasification mode, a light hydrocarbon gas gasification station can be built in each village, and the gas is sent to each household through a village official network for heating, so that the device is convenient for a natural gas pipe network to be transported and distributed and used in remote areas with difficult construction.

A condenser 21 connected with the steam generator 30 is arranged in the light hydrocarbon oil, and steam generated in the steam generator 30 is changed into liquid water drops in the condenser 21 to release heat for gasifying the light hydrocarbon oil. The top of the vaporizer 24 is connected with the air extraction pipe 25, a large amount of bubbles are formed in the light hydrocarbon oil along with the air blowing of the air supply device into the light hydrocarbon oil, at this time, the bubbles are broken and coalesced due to the mutual power action of the gas-liquid two phases, and volatile components in the light hydrocarbon liquid escape from the phase interface and enter the bubbles (during mass diffusion) under the driving force of the concentration difference of each component on the contact area. After the bubbles containing combustible components volatilized by the light hydrocarbon are flushed out of the liquid level, the mixed air light hydrocarbon gas with the concentration meeting the requirements of safety and combustion is formed. The mixed air and light hydrocarbon fuel gas is separated from the surface of the light hydrocarbon oil in the vaporizer 24 and is sent out through an air exhaust pipe 25 communicated with the top of the vaporizer 24 for users to use.

As shown in figure 1, the liquid baffle orifice plate 22 is arranged above the liquid level of the light hydrocarbon oil, and the liquid baffle orifice plate 22 can prevent larger liquid drops from mixing into the light hydrocarbon gas, so that the bubbling is more uniform, and the gas making efficiency is higher. Impurities which can not be volatilized in the gas making process are discharged through a sewage discharge outlet 17 at the bottom of the vaporizer 24.

The air supply device comprises an air inlet 1, a Roots blower 2, an air buffer preheater 3 and an air distributor 5 which are connected in sequence through an air inlet pipe, wherein the air distributor 5 is arranged below a condenser 21 in a vaporizer 24. And a flow speed regulating valve 4 is arranged on an air inlet pipe connected with the air distributor 5 and the air buffer preheater 3. The air passes through the air distributor 5 when the light hydrocarbon oil is blown in, and the air and the light hydrocarbon oil can be mixed intensively due to the arrangement of the air distributor 5. The bubbles are broken and coalesced to generate a large amount of bubbles, so that the gas-liquid phase contact area is multiplied, and the mass transfer efficiency is improved. The setting of the flow rate regulating valve 4 can strictly control the jet flow speed when air is injected through the air distributor 5, so that the air flow speed field and the concentration field of volatile components of light hydrocarbon oil are coordinated, and the gas making efficiency is higher.

The oil supply device comprises an oil storage tank 6, an oil pump 8 and an oil preheater 9 which are sequentially connected through oil pipes, wherein the oil preheater 9 is connected with the lower part of the vaporizer 24 through an oil supplementing regulating valve 10. The light hydrocarbon oil is sent into the vaporizer 24 through the oil pump 8, and the arrangement of the oil compensation adjusting valve 10 is beneficial to the control of oil quantity adjustment in the gas production process, so that the gas production requirement is met. The preheated light hydrocarbon oil and air are easier to produce gas.

As shown in fig. 1, the steam generator 30 is connected to the inlet of the condenser 21 and the inlet of the air buffer preheater 3 through the proportional control valve 26, the outlet of the condenser 21 is connected to the inlet of the air buffer preheater 3, the outlet of the air buffer preheater 3 is connected to the inlet of the evaporator 18 through the working medium throttle valve 19, and the outlet of the evaporator 18 is connected to the absorber 14. The part of the working medium evaporated in the steam generator 30 enters the condenser 21 under the action of the proportion regulating valve 19, and the heat is condensed in the condenser 21 to provide latent heat of gasification for the light hydrocarbon gas making process; part of working medium directly enters the air buffer preheater 3 after being mixed with the working medium flowing out of the condenser 21, the working medium in the pipe of the air buffer preheater 3 exchanges heat with the air outside the pipe, the water working medium is condensed into liquid after passing through the condenser 21 and the air buffer preheater 3, and the throttling and pressure reduction are carried out through the working medium throttle valve 21, so that the water working medium can be evaporated in the evaporator 18 at a lower temperature.

The air-fume heat exchanger 16 is connected to the air inlet of the evaporator 18. The heat absorbed by the evaporation of the working medium is provided by the flue gas generated by the combustion of light hydrocarbon gas. The waste heat of the flue gas is fully utilized, the temperature of the discharged flue gas is greatly reduced, and the environment is protected. The low pressure steam generated in the evaporator 22 is directed into the absorber 23.

The steam generator 30 is internally provided with a lithium bromide solution 32, a hearth 12 is arranged below the lithium bromide solution 32, the hearth 12 is respectively connected with the air storage tank 11 and the air flue gas heat exchanger 16, light hydrocarbon gas sent into the hearth 12 and air preheated by the air flue gas heat exchanger 16 are combusted to emit heat to heat the lithium bromide solution 32 above the hearth to boil the light hydrocarbon gas, and because the boiling point of water is lower than that of lithium bromide in the lithium bromide solution 17, water is gasified by absorbing heat to form steam.

The lithium bromide solution 32 is connected with the liquid inlet of the absorber 14 through the solution heat exchanger 13 and the throttle valve 15 in sequence, and the liquid outlet of the absorber 14 is connected with the steam generator 30 through the solution pump 7 and the solution heat exchanger 13 in sequence. After the lithium bromide solution 32 in the steam generator 30 is evaporated, the lithium bromide solution 32 with higher concentration is sent into the absorber 14 through the solution heat exchanger 13 and the throttle valve 15, mixed with the low-pressure steam sent from the evaporator 18 in the absorber 14, and absorbs the steam. The lithium bromide solution 32 with reduced concentration passes through the solution pump 24 and the solution heat exchanger 25 and enters the steam generator 30 for the next cycle. The solution in the absorber absorbs the steam to release a large amount of heat, which heats the light hydrocarbon oil in the oil preheater 9 at the lower part of the absorber 14.

In conclusion, the device comprises an air loop and a light hydrocarbon oil loop for supplying raw materials for gas production, a water working medium loop and a lithium bromide working medium loop for ensuring the gasification heat requirement, and a light hydrocarbon gas loop for driving smooth gas production and a flue gas loop for recycling the waste heat of light hydrocarbon combustion flue gas.

As shown in fig. 1, an oxygen analyzer 23, a droplet separator 27, a surge tank 28, a pressure regulating valve 29 and a heat value analyzer 31 are sequentially arranged on the air exhaust pipe 25, the oxygen analyzer 23 is connected with the air buffer preheater 3, and the air outlet end of the air exhaust pipe 25 is respectively connected with the air storage tank 11 and the light hydrocarbon outlet 33. The light hydrocarbon gas produced by the vaporizer 24 is discharged from the gas extraction pipe 25 at the top, and before being used by a user, the light hydrocarbon gas also needs to pass through an oxygen analyzer 23, a droplet separator 27, a surge tank 28, a pressure regulating valve 29, a heat value analyzer 31 and other equipment. The oxygen analyzer 23 ensures that the oxygen content in the light hydrocarbon gas is within the allowable range. The light hydrocarbon gas can have the oil condensation problem under the influence of ambient temperature and pressure in the transportation process, and the oil condensation contained in the light hydrocarbon gas can have the safety problem. The flow resistance of the light hydrocarbon gas is improved through the droplet separator 27, so that partial droplets are separated out, and the possibility of oil condensation of the gas in the conveying process is further reduced. The surge tank 28 ensures stable delivery pressure of the gas. The heat value analyzer 31 ensures that the light hydrocarbon gas meets the user requirements, and the heat value of the gas needs to be detected under different environmental conditions and the user heat load requirement conditions. In addition, this novel gas system gas device is driven by light hydrocarbon gas, and the gas preparation process also needs carry out real-time gas supply to equipment.

Finally, it should be noted that: the above examples are merely illustrative for the clarity of the present invention, and are not intended to be exclusive or limiting. It will be apparent to those skilled in the art that many more modifications and variations than mentioned above are possible in light of the above teaching, and it is not intended to be exhaustive or to limit all embodiments to the precise form disclosed, and all changes and modifications that are obvious are intended to fall within the scope of the invention.