WO2017193663A1

WO2017193663A1 - Method for treating carbon monoxide in automobile exhaust gas

Info

Publication number: WO2017193663A1
Application number: PCT/CN2017/074035
Authority: WO
Inventors: 黄方元; 黄安武; 黄海艳
Original assignee: 黄方元; 黄安武
Priority date: 2016-05-09
Filing date: 2017-02-19
Publication date: 2017-11-16
Also published as: CN106014570A; CN107851326A; WO2017193679A1

Abstract

A method for treating carbon monoxide in automobile exhaust gas, said method comprising the following steps: monitoring exhaust gas of an automobile exhaust gas purifier outlet in real time, and analysing the exhaust gas to obtain the types of various harmful gases in the exhaust gas (S101); identifying the various harmful gases according to the types of the harmful gases (S102); according to the identification, determining whether the harmful gases in the exhaust gas include carbon monoxide (S103); if yes, generating an absorption command, and via the absorption command, discharging the exhaust gas to a container provided with a carbon monoxide absorber for carbon monoxide treatment (S104). The method for treating carbon monoxide effectively treats carbon monoxide in automobile exhaust gas in a timely manner, and reduces environmental pollution and bodily harm.

Description

Method for treating carbon monoxide in automobile exhaust

Technical field

The invention relates to the technical field of automobiles, and in particular to a method for treating carbon monoxide in automobile exhaust gas.

Background technique

The emission of automobile exhaust is a matter of great concern to the society. The exhaust gas emitted by automobiles contains various harmful gases including carbon monoxide (CO), which on the one hand cause environmental pollution and on the other hand cause harm to the human body.

For example, carbon monoxide in the automobile exhaust combines with hemoglobin in the blood 250 times faster than oxygen. Carbon monoxide enters the blood circulation through the respiratory tract and forms a carboxyhemoglobin after affinity with hemoglobin, thereby weakening the function of blood to transport oxygen to tissues. The central nervous system causes dysfunction such as human feelings, reactions, understanding, memory, etc., and the severe ones endanger the blood circulation system, leading to life-threatening. Therefore, even a slight inhalation of carbon monoxide may cause terrible anoxic damage.

Therefore, how to further treat the automobile exhaust gas to reduce the pollution degree and personal injury of the exhaust gas has become an urgent problem to be solved.

Summary of the invention

In view of the deficiencies of the prior art, the present invention aims to provide a method for treating carbon monoxide in automobile exhaust gas, which can effectively treat carbon monoxide in automobile exhaust gas in time, and reduce environmental pollution and personal injury of exhaust gas.

To achieve the above object, the present invention adopts the following technical solutions:

A method for treating carbon monoxide in automobile exhaust gas, comprising the following steps:

Real-time monitoring of the exhaust gas at the outlet of the automobile exhaust gas purifier, and analysis of the exhaust gas to obtain the types of various harmful gases in the exhaust gas;

Identify each hazardous gas according to the type of harmful gas;

If yes, determining whether the harmful gas in the exhaust gas contains only carbon monoxide according to the identifier;

If it is judged according to the flag that the harmful gas in the exhaust gas contains only carbon monoxide, an absorption command is generated, and the exhaust gas is discharged into a vessel having a carbon monoxide absorbent by the absorption command to perform carbon monoxide treatment.

Compared with the prior art, the method for treating carbon monoxide in automobile exhaust gas of the present invention detects the kinds of harmful gases contained in automobile exhaust gas, and identifies various harmful gases, and particularly marks harmful gases according to the marking. It treats carbon monoxide and realizes targeted treatment of harmful gases, which can effectively improve the efficiency of tail gas treatment, avoid pollution of the automobile exhaust and cause harm to the human body.

DRAWINGS

1 is a schematic flow chart of a method for treating carbon monoxide in automobile exhaust gas according to an embodiment of the present invention;

2 is a flow chart of processing automobile exhaust in an embodiment of the present invention.

detailed description

The present invention will be further described below in conjunction with the drawings and specific embodiments.

After the vehicle exhaust passes through the purifier, the harmful gases contained in it are usually in the standard. State, but in the event of a malfunction of the engine or failure of the purifier, excessive exhaust gas may occur, and the present invention is mainly directed to secondary treatment of exhaust gas. As shown in FIG. 1 , a method for treating carbon monoxide in automobile exhaust gas according to the embodiment includes the following steps:

In step S101, the exhaust gas at the outlet of the automobile exhaust gas purifier is monitored in real time, and the exhaust gas is analyzed to obtain the types of various harmful gases in the exhaust gas.

In one embodiment, multiple gas detectors may be utilized to detect the exhaust. Each gas detector can detect the type of harmful gas contained in the exhaust gas, respectively. In an embodiment of the invention, the gas detector comprises at least one detector for detecting carbon monoxide in the exhaust.

In step S102, each harmful gas is identified according to the type of the harmful gas. Harmful gases can be identified based on the results detected by different gas detectors.

Step S103, determining whether the harmful gas in the exhaust gas contains carbon monoxide according to the identifier. If yes, step S104 can be performed at this time.

In step S104, if the result of the determination in step S103 is YES, that is, it is determined according to the flag that the harmful gas in the exhaust gas contains carbon monoxide, an absorption command is generated, and the exhaust gas is discharged into a vessel having a carbon monoxide absorbent by the absorption command to perform carbon monoxide treatment.

In one embodiment, the carbon monoxide absorber may be a composition composed of a porous inorganic carrier and a binary complex of a nitride and copper chloride carried thereon, and the nitride in the composition may be It accounts for 0.4-0.7 molar ratio. Further, the inorganic carrier may be: porous ceramic, activated carbon or titanium oxide. The nitride can be: pyridine and

Composition and the like. The carbon monoxide absorbent can effectively absorb the oxidation in the exhaust gas.

In one embodiment, the process of real-time monitoring of the exhaust gas at the outlet of the automobile exhaust gas purifier and analyzing the exhaust gas to obtain the kinds of various harmful gases in the exhaust gas may include the following steps:

Real-time monitoring of exhaust gas by means of infrared detection;

Generating a corresponding electrical signal according to the wavelength range of the absorbed infrared light and the degree of absorption;

The type of harmful gas is analyzed based on the electrical signal.

Since automobile exhaust gas usually contains various harmful gases such as carbon monoxide, hydrocarbons, sulfur oxides, and nitrogen oxides. Each of these gases has a specific characteristic absorption band and characteristic frequency. When the infrared spectrum falls near the characteristic frequency band, it is strongly absorbed. Therefore, the infrared spectrum of the corresponding characteristic frequency can be used to detect harmful gases in the exhaust gas. Ingredients.

As a preferred embodiment, the step of discharging the exhaust gas into the container having the carbon monoxide absorbent in the step S104 for performing the carbon monoxide treatment may specifically include the following steps:

Obtaining an infrared light intensity obtained by passing infrared rays through the exhaust gas, and calculating a concentration of carbon monoxide in the exhaust gas according to the infrared light intensity;

Acquiring the rotational speed of the automobile engine and the current temperature in the container having the carbon monoxide absorbent in real time; the current temperature can be obtained by placing a temperature sensor in a container having a carbon monoxide absorbent;

The speed of the exhaust gas is calculated based on the rotational speed of the automobile engine, the current temperature, and the concentration of carbon monoxide, and the absorption of carbon monoxide in the container is controlled according to the speed. Ben In the embodiment, the following formula can be used to calculate the speed of exhaust emissions:

In the above formula, V _CO is the speed at which the exhaust gas is discharged, and in the present invention, the speed at which the exhaust gas is discharged into the container having the carbon monoxide absorbent; r is the rotational speed of the automobile engine, C is the concentration of carbon monoxide, and T is the absorbent having carbon monoxide. The current temperature in the container, a is a constant coefficient between 0.25 and 0.47. By controlling the rate at which the exhaust gas is discharged into the vessel having the carbon monoxide absorbent, carbon monoxide can be more completely absorbed by the carbon monoxide absorbent in the vessel having the carbon monoxide absorbent, thereby increasing the efficiency of the carbon monoxide treatment. In particular, a large amount of experimental data proves that when the value of a is taken as 0.32, the efficiency of carbon monoxide treatment is optimal.

In a preferred embodiment, if it is determined according to the identifier that the harmful gas in the exhaust gas does not only contain carbon monoxide, that is, in addition to the nitric oxide in the exhaust gas, and other harmful gases are also exceeded, the absorption command may be simultaneously generated. And the catalytic reaction command, through the absorption command and the catalytic reaction command, the automobile exhaust gas is sequentially discharged into a container having a carbon monoxide absorbent and a photocatalytic reactor, as shown in FIG. 2 . In the embodiment of the present invention, after the carbon monoxide treatment, the exhaust gas may also pass through the photocatalytic reaction layer having the titanium dioxide and emit ultraviolet rays to absorb the nitride and the sulfide, because the embodiment is for the secondary treatment of the automobile exhaust gas. Usually, the content of harmful substances in the exhaust gas of the automobile is usually low, so that the nitride and the sulfide can be completely absorbed by the photocatalytic reaction. In order to enhance the absorption of nitrides and sulfides, it is usually necessary to pass oxygen. The oxygen can be supplied through an oxygen generator. In this step, a small amount of carbon monoxide can also be absorbed to further improve the treatment efficiency of carbon monoxide.

In the above embodiment, by treating all the harmful gas contents exceeding the standard, the gas is treated separately by treating the carbon monoxide and then treating other harmful gases, thereby effectively improving the efficiency of the exhaust gas treatment and better reducing the exhaust gas. harmful gas.

As a preferred embodiment, after the exhaust gas is processed according to the identifier, the following steps may be further included:

Collecting the exhausted vehicle exhaust gas and pressurizing it to separate carbon dioxide and nitrogen in the exhaust gas;

The separated nitrogen is discharged and the separated carbon dioxide is stored.

In this embodiment, since the density of nitrogen gas is smaller than that of carbon dioxide, nitrogen gas may float above the carbon dioxide after being pressurized to a certain range. The pressure treatment is carried out in a container having an opening at the upper end. When the pressure in the container is sufficient to separate the carbon dioxide and the nitrogen gas, the upper end opening is opened to discharge the nitrogen gas, so that carbon dioxide can be collected. Although carbon dioxide emissions cause environmental pollution in the air, they can be used in industrial and agricultural production, so that carbon dioxide can be effectively utilized to avoid environmental pollution.

In a preferred embodiment, when it is determined according to the identifier that the harmful gas in the exhaust gas contains carbon monoxide, an alarm command and a display command are generated, an early warning is performed according to the alarm command, and the display is performed at a corresponding position of the dashboard of the automobile according to the display instruction. Through early warning and display, people can timely and intuitively understand the carbon monoxide information, so that people can overhaul the engine through the warning and display content, and timely control the exhaust gas pollution environment.

It can be seen from the above scheme that a method for treating carbon monoxide in automobile exhaust gas according to an embodiment of the present invention detects a kind of harmful gas contained in automobile exhaust gas, and identifies various harmful gases, which is harmful according to the logo. Gas, especially to oxygen The carbon treatment is carried out to achieve targeted treatment of harmful gases, which can effectively improve the efficiency of tail gas treatment, avoid pollution of the automobile exhaust and cause harm to the human body.

It should be noted that the automobile exhaust gas purifiers in the embodiments of the present invention may be prior art.

Various other changes and modifications may be made by those skilled in the art in light of the above-described technical solutions and concepts, and all such changes and modifications are intended to fall within the scope of the appended claims.

Claims

A method for treating carbon monoxide in automobile exhaust gas, comprising the steps of:

Real-time monitoring of the exhaust gas at the outlet of the automobile exhaust gas purifier, and analysis of the exhaust gas to obtain various types of harmful gases in the exhaust gas; specifically: real-time monitoring of the exhaust gas by means of infrared detection; according to the wavelength range of the absorbed infrared rays and The degree of absorption, generating a corresponding electrical signal; analyzing the type of harmful gas based on the electrical signal;

Identify each hazardous gas according to the type of harmful gas;

Determining, according to the identifier, whether the harmful gas in the exhaust gas contains carbon monoxide;

If yes, generating an absorption command, wherein the exhaust gas is discharged into a container having a carbon monoxide absorbent for carbon monoxide treatment; specifically comprising: obtaining infrared light intensity obtained by passing infrared rays through the exhaust gas, and calculating according to the infrared light intensity a concentration of carbon monoxide in the exhaust gas; real-time acquisition of the rotational speed of the automobile engine and the current temperature in the vessel having the carbon monoxide absorbent; calculating the velocity of the exhaust gas emissions based on the rotational speed of the automobile engine, the current temperature, and the concentration of carbon monoxide, and according to the Speed to control the absorption of carbon monoxide in the vessel; wherein the rate of exhaust emissions is calculated using the following formula:

In the formula, V CO is the speed of exhaust gas emission, r is the rotational speed of the automobile engine, C is the concentration of carbon monoxide, T is the current temperature, and a is a constant coefficient, and the value ranges from 0.25 to 0.47.
A method of treating carbon monoxide in automobile exhaust gas according to claim 1, wherein said carbon monoxide absorbent is a combination of a porous inorganic carrier and a binary complex of a nitride and a copper chloride carried thereon And the nitride in the composition accounts for 0.4-0.7 molar ratio; the inorganic carrier comprises: porous ceramic, activated carbon or titanium oxide; the nitride is pyridine and
Compositions.
The method for treating carbon monoxide in automobile exhaust gas according to claim 1, wherein if it is determined that the harmful gas in the exhaust gas does not contain only carbon monoxide according to the label, an absorption command and a catalytic reaction command are simultaneously generated, and the absorption is performed. The command and catalytic reaction instructions process the vehicle exhaust gas in a row with a carbon monoxide absorbent and a photocatalytic reactor.
The method of treating carbon monoxide in an automobile exhaust gas according to claim 1, wherein after the exhaust gas is processed, the method further comprises:

Collecting the exhausted vehicle exhaust gas and pressurizing it to separate carbon dioxide and nitrogen in the exhaust gas;

The separated nitrogen is discharged and the separated carbon dioxide is stored.
The method for processing carbon monoxide in automobile exhaust gas according to claim 1, wherein when it is determined that the harmful gas in the exhaust gas contains carbon monoxide according to the identifier, an alarm command and a display instruction are generated, and an early warning is performed according to the alarm instruction, and according to the display The command is displayed at the corresponding position on the dashboard of the car.