阅读说明：本技术 一种利用热气机尾气脱氢的装置及方法 (Device and method for dehydrogenation by utilizing tail gas of thermomotor ) 是由 焦宗寒 郑欣 刘荣海 杨迎春 许宏伟 郭新良 周静波 虞洪江 陈国坤 代克顺 程 于 2019-11-27 设计创作，主要内容包括：本发明公开了一种利用热气机尾气脱氢的装置及方法,包括尾气管道、燃烧器和脱氢反应器,将热气机的尾气管道从脱氢反应器中贯穿通过,利用热气机尾气的余热进行有机储氢材料脱氢反应,将空气与经脱氢反应器分离出的氢气分别通过管道通入尾气管道中,通过空气和氢气在尾气中燃烧释放热量来调整热气机尾气进入脱氢装置的温度,控制脱氢反应器中的温度保持在180～240℃之间,并通过阀门控制尾气管道流量、氢气管道流量、空气管道流量,使混合气体中氢气浓度低于4％。本发明有效利用热气机尾气的废热,利用氢气在高温富氧环境里燃烧替代电加热,提高了整个脱氢发电系统的能量转换效率,能节约大量能源,产生较大的经济效益。(The invention discloses a device and a method for dehydrogenation by utilizing tail gas of a thermomotor, and the device comprises a tail gas pipeline, a combustor and a dehydrogenation reactor, wherein the tail gas pipeline of the thermomotor penetrates through the dehydrogenation reactor, the dehydrogenation reaction of an organic hydrogen storage material is carried out by utilizing the waste heat of the tail gas of the thermomotor, air and hydrogen separated by the dehydrogenation reactor are respectively introduced into the tail gas pipeline through pipelines, the temperature of the tail gas of the thermomotor entering the dehydrogenation device is adjusted by burning the air and the hydrogen in the tail gas to release heat, the temperature in the dehydrogenation reactor is controlled to be kept between 180 and 240 ℃, and the flow of the tail gas pipeline, the flow of the hydrogen pipeline and the flow of the air pipeline are controlled by a valve, so that the concentration of the hydrogen. The invention effectively utilizes the waste heat of the tail gas of the hot gas engine, utilizes the combustion of hydrogen in the high-temperature oxygen-enriched environment to replace electric heating, improves the energy conversion efficiency of the whole dehydrogenation power generation system, can save a large amount of energy and generates larger economic benefit.)

1. The utility model provides an utilize dehydrogenating device of thermomotor tail gas which characterized in that: comprises a tail gas pipeline (1), a combustor (2), a dehydrogenation reactor (3) and a gas-liquid separator (5), the dehydrogenation reactor (3) is a horizontally inverted tank body, the tail gas pipeline (1) horizontally penetrates through the dehydrogenation reactor (3), the tail gas pipeline (1) passes through a combustor (2) before entering the dehydrogenation reactor (3), an outlet pipeline of the dehydrogenation reactor (3) is connected with the gas-liquid separator (5), a dehydrogenation hydrogen pipeline (6) is arranged at the upper part of the gas-liquid separator (5), a dehydrogenation hydrogen oil pipeline (7) is arranged at the lower part of the gas-liquid separator (5), the combustor (2) is also connected with a combustion hydrogen pipeline (9) and an air pipeline (10), one end of the combustion hydrogen pipeline (9) is connected with the combustor (2), and the other end of the combustion hydrogen pipeline is communicated with the dehydrogenation hydrogen pipeline (6) through a three-way valve (8).

2. The device for utilizing the tail gas of the thermomotor for dehydrogenation according to claim 1, wherein: the device is characterized in that an inlet pipeline of the dehydrogenation reactor (3) is arranged at the upper part of the dehydrogenation reactor, an outlet pipeline of the dehydrogenation reactor (3) is arranged at the lower part of the dehydrogenation reactor, the inlet pipeline of the dehydrogenation reactor (3) is arranged close to the inlet end of the tail gas pipeline (1), and the inlet pipeline of the dehydrogenation reactor (3) is arranged close to the outlet end of the tail gas pipeline (1).

3. The device for utilizing the tail gas of the thermomotor for dehydrogenation according to claim 1 or 2, wherein: the tail gas pipeline (1) extends in a snake shape in the dehydrogenation reactor (3).

4. The device for utilizing the tail gas of the thermomotor for dehydrogenation according to claim 3, wherein: and a temperature sensor is arranged in the dehydrogenation reactor (3).

5. The device for utilizing the tail gas of the thermomotor for dehydrogenation according to claim 3, wherein: and a gas flow control valve is arranged on the air pipeline (10).

6. The device for utilizing the tail gas of the thermomotor for dehydrogenation according to claim 3, wherein: the dehydrogenation reactor (3) is provided with a heat preservation layer 4.

7. A method for utilizing tail gas of a thermomotor to dehydrogenate is characterized in that: and (3) enabling a tail gas pipeline of the thermomotor to penetrate through the dehydrogenation reactor, and carrying out dehydrogenation reaction on the organic hydrogen storage material by utilizing the waste heat of the tail gas of the thermomotor.

8. The method for dehydrogenating by utilizing tail gas of a thermomotor as claimed in claim 7, wherein: and respectively introducing air and hydrogen separated from the dehydrogenation reactor into a tail gas pipeline through pipelines, and regulating the temperature of the tail gas of the thermomotor entering the dehydrogenation device by burning the air and the hydrogen in the tail gas to release heat.

9. The method for utilizing the tail gas of the thermomotor for dehydrogenation according to claim 8, wherein: and controlling the temperature in the dehydrogenation reactor to be kept between 180 and 240 ℃.

10. The method for dehydrogenating by utilizing tail gas of a thermomotor according to claim 7 or 8, characterized in that: and controlling the flow of the tail gas pipeline, the flow of the hydrogen pipeline and the flow of the air pipeline to ensure that the concentration of hydrogen in the mixed gas is lower than 4 percent.

Technical Field

The invention belongs to the technical field of hydrogen energy power generation, and particularly relates to a device and a method for utilizing tail gas of a hot gas engine to perform dehydrogenation.

Background

In recent years, the organic liquid hydrogen storage technology has been developed, and the organic liquid hydrogen storage technology is to realize the storage and release of hydrogen by the reversible hydrogenation/dehydrogenation reaction with hydrogen by means of some hydrogen storage solvents with unsaturated carbon-carbon bonds such as alkene, alkyne or aromatic hydrocarbon. The hydrogen energy power generation system is mainly divided into a hydrogen production unit, a hydrogen storage unit, a dehydrogenation unit and a power generation unit. The hydrogen production unit mainly adopts the technology of generating hydrogen by electrolyzing water, the hydrogen storage unit mainly adopts organic liquid benzene ring aromatic hydrocarbon to store hydrogen, the dehydrogenation unit heats and catalyzes the organic liquid for storing hydrogen to remove hydrogen, and the power generation unit comprises a hydrogen fuel cell, a hot air engine and the like. The dehydrogenation process of the organic liquid hydrogen storage material is a heat absorption process, the heating device of the existing dehydrogenation reactor adopts an electric heating mode, electric energy is provided by hydrogen fuel cells for power generation, so that a large amount of electric energy is consumed in the dehydrogenation process, the total conversion efficiency of the fuel cells is more in the range of 40-50%, the energy is converted from hydrogen into electric energy for reheating and using, the energy efficiency of a hydrogen storage system is limited, meanwhile, the tail gas discharged by a hydrogen heat engine is about 220 ℃, the power generation efficiency of the heat engine is about 20-25%, most of the energy is discharged along with the tail gas in a heat form, the energy efficiency of the whole dehydrogenation power generation system is greatly reduced, and the problems of waste of high-temperature tail gas energy of the heat engine and overhigh conversion of the hydrogen fuel cells exist, so the invention is particularly important.

Disclosure of Invention

The invention aims to overcome the problem that the heat energy of tail gas of a thermomotor in the prior art is wasted, so that the energy conversion efficiency of the whole dehydrogenation power generation system is low, and provides a device and a method for dehydrogenation by using the tail gas of the thermomotor.

The invention adopts the following technical scheme:

the utility model provides an utilize dehydrogenating device of hot-air engine tail gas which the key lies in: including tail gas pipeline, combustor, dehydrogenation reactor and vapour and liquid separator, the jar body that the dehydrogenation reactor was the level inversion, tail gas pipeline level runs through the dehydrogenation reactor, the tail gas pipeline gets into still pass through the combustor before the dehydrogenation reactor, the exit tube coupling of dehydrogenation reactor vapour and liquid separator, vapour and liquid separator upper portion is equipped with the dehydrogenation hydrogen pipeline, the vapour and liquid separator lower part is equipped with dehydrogenation hydrogen oil pipe way, the combustor still is connected with burning hydrogen pipeline and air conduit, burning hydrogen pipeline one end is connected the combustor, the other end pass through the three-way valve with dehydrogenation hydrogen pipeline switch-on. The effect of this scheme is: the high-temperature tail gas of the hot spot device is fully utilized and is subjected to heat exchange with hydrogen oil to be dehydrogenated in the dehydrogenation reactor, the high-temperature tail gas is heated and catalyzed to be dehydrogenated to remove hydrogen, the waste heat of the tail gas of the hot spot device is fully utilized, energy is saved, the hydrogen generated by dehydrogenation can be recycled and used for increasing the temperature of the tail gas entering the dehydrogenation reactor, and the three-way valve can also control the hydrogen flow entering the combustor.

Preferably, the inlet pipeline of the dehydrogenation reactor is arranged at the upper part of the dehydrogenation reactor, the outlet pipeline of the dehydrogenation reactor is arranged at the lower part of the dehydrogenation reactor, the inlet pipeline of the dehydrogenation reactor is arranged close to the inlet end of the tail gas pipeline, and the inlet pipeline of the dehydrogenation reactor is arranged close to the outlet end of the tail gas pipeline. The effect of this scheme is: the flow path and time of the hydrogen oil entering the dehydrogenation reactor are increased, more heat exchange is carried out, and the hydrogen oil is fully heated and catalyzed.

Preferably, the tail gas pipeline extends in a serpentine shape in the dehydrogenation reactor. The effect of this scheme is: the distance of the tail gas pipeline in the dehydrogenation reactor is increased, so that the tail gas pipeline is fully contacted with the hydrogen oil in the dehydrogenation reactor, and the heat of the tail gas pipeline can be fully utilized.

Preferably, a temperature sensor is arranged in the dehydrogenation reactor. The effect of this scheme is: the temperature in the dehydrogenation reactor can be conveniently detected, the temperature in the dehydrogenation reactor is ensured to be 180-240 ℃, and the maximum dehydrogenation efficiency is kept.

Preferably, a gas flow control valve is arranged on the air pipeline. The effect of this scheme is: facilitating control of the flow of air into the burner.

Preferably, the dehydrogenation reactor is provided with an insulating layer. The effect of this scheme is: effectively reducing heat loss and saving energy.

The method for utilizing tail gas of the thermomotor to dehydrogenate is characterized in that: and (3) enabling a tail gas pipeline of the thermomotor to penetrate through the dehydrogenation reactor, and carrying out dehydrogenation reaction on the organic hydrogen storage material by utilizing the waste heat of the tail gas of the thermomotor. The effect of this scheme is: the tail gas pipeline temperature of the hot air engine is about 220 ℃, the dehydrogenation temperature is in the range of 180-240 ℃, energy can be effectively saved when the hot air engine is used in hydrogen oil dehydrogenation, the original electric heating mode is replaced, and the energy efficiency of the whole dehydrogenation power generation system can be improved.

Further, air and hydrogen separated from the dehydrogenation reactor are respectively introduced into a tail gas pipeline through pipelines, and the temperature of tail gas of the thermomotor entering the dehydrogenation reactor is adjusted by burning the air and the hydrogen in the tail gas to release heat. The effect of this scheme is: through the combustion of hydrogen and oxygen, the temperature of tail gas of the thermomotor entering the dehydrogenation reactor can be raised, and the temperature in the dehydrogenation reactor is kept in the optimal temperature range for heating and catalyzing.

Further, the temperature in the dehydrogenation reactor is controlled to be kept between 180 and 240 ℃. The effect of this scheme is: the optimal dehydrogenation temperature range of hydrogen oil stored by organic materials is 180-240 ℃.

Further, the flow of the tail gas pipeline, the flow of the hydrogen pipeline and the flow of the air pipeline are controlled, so that the concentration of hydrogen in the mixed gas is lower than 4%. The effect of this scheme is: the hydrogen in the combustor can be effectively ensured to be fully combusted in an oxygen-enriched environment, so that the combustion of the hydrogen can be maximized to release heat.

Has the advantages that: according to the device and the method for dehydrogenation by utilizing the tail gas of the heat engine, the waste heat of the tail gas of the heat engine is effectively utilized, part of hydrogen discharged in the dehydrogenation link is added, and the hydrogen is combusted in a high-temperature oxygen-enriched environment to replace electric heating, so that the energy conversion efficiency of the whole dehydrogenation power generation system is improved, a large amount of energy can be saved, and great economic benefits are generated.

Drawings

FIG. 1 is a schematic view of the structure of the apparatus of the present invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying drawings: