CN105909345A - An air intake separation diesel engine CO2 collection system and its working method - Google Patents

Abstract

The invention discloses an air separation type diesel engine CO2 collection system. The air separation type diesel engine CO2 collection system includes an air separator (1), a diesel engine (2), a first gas separator (3), a water cleaning device (4), a first compressor (5), a second gas separator (6), a second compressor (7), a third compressor (8), and a CO2 collector (9). The invention also provides a working method for the air separation type diesel engine CO2 collection system. The method includes that: the air separator (1) separates oxygen and nitrogen in air; the oxygen enters the diesel engine (2) to be combusted, CO2 and H2O generated during combustion are separated through the gas separators, wherein the H2O is recovered through the water cleaning device (4), and the CO2 is stored in the CO2 collector (9) through pressure boost and liquidation by means of three compressors. According to the technical scheme, the diesel engine will not generate nitrogen oxide during combustion, the CO2 generated during combustion can be collected, the problem that the diesel engine generates pollutants can be solved thoroughly, and zero release of the diesel engine can be achieved.

Description

An air intake separation diesel engine CO2 collection system and its working method

technical field

The invention relates to the technical field of diesel engines, in particular to an air intake separation type diesel engine _CO2 collection system and a working method thereof.

Background technique

Diesel will produce NOx and CO ₂ after being combusted with air in the combustion chamber of the diesel engine, wherein NOx is produced when part of nitrogen in the air is combusted at high temperature.

Among them, _NOx is the main pollutant that forms acid rain. The most harmful thing of NOx to the human body is to stimulate the human respiratory center, resulting in shortness of breath. Power plants often propose many denitrification solutions for NOx, but these methods cannot be applied to vehicle diesel engines or diesel engines in small spaces or closed areas.

The dramatic increase in _CO2 levels in the atmosphere in recent years has also contributed to the greenhouse effect. In the past, CO ₂ was not listed as a factor of environmental pollution, but with the improvement of environmental standards, the harm of CO ₂ has increasingly become a research focus. The patent (ZL201210119473.4) gives an idea of a CO ₂ capture device, but it does not form an overall solution with the air treatment before diesel engine combustion, and the design for collecting CO ₂ for diesel engines is not sufficient, and further research is needed for practical applicability .

Therefore, it is necessary to propose a more feasible overall scheme to realize that the diesel fuel in the diesel engine does not generate NOx after combustion, and at the same time, it can solve the problem of CO ₂ collection.

Contents of the invention

The purpose of the present invention is just to solve the technical problems raised above, and proposes an air intake separation type diesel engine CO2 collection system, which treats the air before the diesel engine burns to remove nitrogen, and at the same time realizes the CO2 collection system in the exhaust gas of the diesel engine. ₂ collection. The invention realizes the NOx and _CO2 zero emission of the diesel engine tail gas in one fell swoop, and conforms to the current reform status quo of energy saving and emission reduction in China.

The invention provides a CO2 collection system for diesel engines with air intake separation, which mainly includes an air separator, a diesel engine, a first-stage gas separator, a water purifier, a first-stage compressor, a second-stage gas separator, a second-stage compressor, and three stage compressor and _CO2 collector;

The pure oxygen outlet of the air separator is connected with the air inlet of the diesel engine through a pipeline;

The exhaust pipe of the diesel engine is connected with the primary gas separator through the pipeline;

The first-stage gas separator has a _CO2 outlet and a water vapor outlet, wherein the water vapor outlet is connected to the water purifier, and the _CO2 outlet is connected to the first-stage compressor;

The gas outlet of the primary compressor is connected to the secondary gas separator through pipelines;

The gaseous water outlet of the secondary gas separator is connected to the water purifier through a pipeline;

The gas outlet of the secondary gas separator is connected to the secondary compressor through a pipeline;

The gas outlet of the secondary compressor is connected to the tertiary compressor through pipelines;

The liquid outlet of the three-stage compressor is connected to the _CO2 collector.

Wherein, the air separator has a shell, and the top of the shell is provided with an air inlet, and the lower part of the shell side is provided with a separated gas outlet, and the gas outlet includes a pure oxygen outlet and other gas outlets. The pure oxygen outlet is connected with the air inlet of the diesel engine through a pipeline, and the other gas outlets are led into the atmosphere.

Wherein, the combustion chamber of the diesel engine has a diesel injection inlet, a pure oxygen inlet and a pure water injection inlet.

Among them, preferably, the primary gas separator separates 90% of gaseous H ₂ O from CO ₂ .

Among them, as a preference, _CO enters the secondary compressor to pressurize to 16bar, and then enters the third-stage compressor to pressurize to 110bar.

The present invention also provides a working method of the intake separation type diesel engine CO2 collection system:

The air separator separates the oxygen and nitrogen in the air, sends the oxygen into the combustion chamber of the diesel engine to mix with the diesel for combustion, and injects water in the late stage of combustion to reduce the combustion temperature;

The gaseous _H2O and _CO2 produced after combustion enter the primary gas separator, the separated gaseous _H2O enters the water purifier, and the remaining gaseous _H2O and _CO2 enter the primary compressor through the primary gas separator pressurized, and then sent to the secondary gas separator;

In the secondary gas separator, the separated gaseous H ₂ O enters the water purifier for recovery, and the separated CO ₂ enters the secondary compressor for pressurization, and then enters the tertiary compressor for pressurization to become liquid CO ₂ . _CO2 collector collection.

Preferably, the air is filtered before entering the air separator.

Preferably, a cooling device is arranged between the primary gas separator and the primary compressor.

As a preference, pure oxygen and diesel oil are sprayed with water to the combustion chamber at the end of the mixed combustion of the diesel engine to prevent sudden combustion.

The invention obtains pure oxygen through air separation, and mixes and burns with diesel in a diesel engine to generate H ₂ O and CO ₂ , which improves the working ability of the diesel engine and eliminates the formation of NO _x and solid particles. Among them, H ₂ O is recovered through the water purifier, CO ₂ is passed through the compressor three times, the pressure is increased, and then the liquefied CO ₂ is collected by the collector, which completely solves the problem of pollution caused by diesel engine combustion and realizes zero emission of diesel engine.

Description of drawings

Fig. 1 is a flow chart of the overall scheme of an air intake separation type diesel engine CO ₂ collection system of the present invention.

In the figure: 1. Air separator, 2. Diesel engine, 3. Primary gas separator, 4. Water purifier, 5. Primary compressor, 6. Secondary gas separator, 7. Secondary compressor, 8 , Three-stage compressor, 9, CO ₂ collector.

detailed description

Below in conjunction with accompanying drawing, the present invention is described in further detail:

Referring to accompanying drawing 1, a kind of intake separation type diesel engine CO2 collection system of the present invention mainly comprises air separator 1, diesel engine 2, primary gas separator 3, water purifier 4, primary compressor 5, secondary gas Separator 6, secondary compressor 7, tertiary compressor 8 and _CO2 collector 9.

The air separator 1 has a shell, the top of the shell is provided with an air inlet, and the lower part of the shell side is provided with a separated gas outlet. The gas outlet includes a pure oxygen outlet and other gas outlets, wherein the pure oxygen outlet is connected to the air inlet of the diesel engine 2 through a pipeline. Other gas outlets lead to the atmosphere.

The combustion chamber of the diesel engine 2 has a diesel injection inlet, a pure oxygen inlet and a pure water injection inlet. The exhaust pipe of the diesel engine 2 is connected with the primary gas separator 3 through pipelines.

The primary gas separator 3 has a _CO2 outlet and a water vapor outlet, wherein the water vapor outlet is connected to the water purifier 4, and the _CO2 outlet is connected to the primary compressor 5.

The gas outlet of the primary compressor 5 is connected to the secondary gas separator 6 through a pipeline. The gaseous water outlet of the secondary gas separator 6 is connected to the water purifier 4 through a pipeline.

The gas outlet of the secondary gas separator 6 is connected to the secondary compressor 7 through a pipeline, the gas outlet of the secondary compressor 7 is connected to the tertiary compressor 8 through a pipeline, and the liquid outlet of the tertiary compressor 8 is connected to the _CO collector 9.

The present invention also provides a working method of an air intake separation type diesel engine CO2 collection system, which is specifically described as follows:

As shown in Figure 1, the air separator 1 separates the oxygen and nitrogen in the air, sends the oxygen into the combustion chamber of the diesel engine 2 to mix with the diesel fuel, and sprays water in the later stage of combustion to reduce the combustion temperature and prevent knocking, which is beneficial Improve work efficiency; gaseous H ₂ O and CO ₂ produced after combustion enter primary gas separator 3; primary gas separator 3 separates 90% of gaseous H ₂ O from CO ₂ , and the separated H ₂ O enters The water purifier 4 is condensed, purified and recovered; the remaining 10% of gaseous H ₂ O and CO ₂ enters the primary compressor 5 through the primary gas separator 3 and pressurizes to 4 bar, and then is sent to the secondary gas separator 6; Gaseous _H2O and _CO2 are completely separated in the secondary gas separator 6, and the separated gaseous _H2O enters the water purifier 4 for recovery, and _CO2 enters the secondary compressor 7 to pressurize to 16bar, and then enters the tertiary compression Machine 8 is pressurized to 110bar to become liquid CO ₂ , which is finally collected by CO ₂ collector 9 .

As a preferred technical solution, the air needs to be filtered before entering the air separator 1 .

As a preferred technical solution, a cooling device is provided between the primary gas separator 3 and the primary compressor 5, that is, the remaining 10% gaseous _H2O and CO enter the primary compressor ₅ through the primary gas separator 3 It needs to be cooled to an appropriate temperature before, so as to ensure that the primary compressor 5 can work normally.

The invention obtains pure oxygen through air separation, and mixes and combusts it with diesel oil in a diesel engine to generate _H2O and _CO2 , which improves the working ability of the diesel engine and eliminates the generation of _NOx and solid particles at the same time, and adopts multi-stage compression The method recovers liquid CO ₂ , completely solves the problem of pollution caused by diesel engine combustion, and realizes zero emission of diesel engine.

The diesel engine of the system of the present invention can be used as a power drive device in narrow spaces or closed areas, such as tunnels and tunnels. At the same time, it can also be used on diesel engines for power generation, distributed power generation, district heating, etc. Or it can also be used on vehicles.

The present invention is not limited to the above description of the embodiments, those skilled in the art according to the content disclosed by the present invention, on the basis of the present invention, it is not necessary to carry out improvement and modification through creative work, such as the selection of air separators and water purifiers, etc. , should be within the protection scope of the present invention.

Claims (10)

1. an air inlet separate type diesel engine CO₂Collection system, mainly includes air separator (1), diesel engine (2), one-level gas separator (3), water purifier (4), stage compressor (5), secondary gas separator (6), split-compressor (7), three-stage blower (8), CO₂Collector (9)；It is characterized in that:

Air separator (1) is connected with the air inlet of diesel engine (2) by pipeline；

The blast pipe of diesel engine (2) is connected with one-level gas separator (3) by pipeline；

One-level gas separator (3) has CO₂Outlet and moisture outlet, wherein moisture outlet connects water purifier (4), CO₂Outlet connects stage compressor (5)；

The gas outlet of stage compressor (5) connects secondary gas separator (6) by the road；

The vaporous water outlet of secondary gas separator (6) connects water purifier (4) by the road；

The gas outlet of secondary gas separator (6) connects split-compressor (7) by the road；

The gas outlet of split-compressor (7) connects three-stage blower (8) by the road；

The liquid outlet of three-stage blower (8) connects CO₂Collector (9).

2. the system as claimed in claim 1, it is characterized in that: air separator (1) has shell, this cover top portion is provided with air intake, and shell side bottom is provided with the gas vent of separator well, and described gas vent includes pure oxygen outlet and other gas vent.

3. system as claimed in claim 2, it is characterised in that: pure oxygen outlet is connected by the air inlet of pipeline with diesel engine (2), and other gas vent is passed through air.

4. system as claimed in claim 2 or claim 3, it is characterised in that: the combustion chamber of diesel engine (2) has diesel oil entrance, pure oxygen inlet and pure water entrance.

5. the system as described in claim 1 or 2 or 3, it is characterised in that: one-level gas separator (3) by 90% gaseous state H₂O and CO₂Separate.

6. the system as described in claim 1 or 2 or 3, it is characterised in that: CO₂Enter split-compressor (7) and be pressurized to 16bar, be pressurized to 110bar subsequently into three-stage blower (8).

7. a method of work for air inlet separate type diesel engine CO2 collection system, based on the system described in any one of claim 1-6, it is characterised in that:

Oxygen, by the oxygen in air and nitrogen separation, is sent into combustion chamber and the diesel oil mixed combustion of diesel engine by air separator, and after combustion the phase spray into water to reduce ignition temperature；

The gaseous state H produced after burning₂O and CO₂Enter one-level gas separator, the gaseous state H after separation₂O enters water purifier, remaining gaseous state H₂O and CO₂Enter stage compressor supercharging through one-level gas separator, be then fed into secondary gas separator；

Gaseous state H in secondary gas separator, after separation₂O enters water purifier and reclaims, the CO after separation₂Enter split-compressor supercharging, become liquid CO subsequently into three-stage blower supercharging₂, finally by CO₂Collector is collected.

8. method of work as claimed in claim 7, it is characterised in that: air entrance air separator (1) is front to be filtered.

9. method of work as claimed in claim 7, it is characterised in that: it is provided with cooling device between one-level gas separator (3) and stage compressor (5).

10. method of work as claimed in claim 7, it is characterised in that: sprayed water to prevent deflagration at the latter end of diesel engine (2) mixed combustion in combustion chamber by pure oxygen with diesel oil.