CN219160348U - Low-carbon emission system combining electrochemical technology and coal-fired ammonia mixing technology - Google Patents
Low-carbon emission system combining electrochemical technology and coal-fired ammonia mixing technology Download PDFInfo
- Publication number
- CN219160348U CN219160348U CN202223250703.9U CN202223250703U CN219160348U CN 219160348 U CN219160348 U CN 219160348U CN 202223250703 U CN202223250703 U CN 202223250703U CN 219160348 U CN219160348 U CN 219160348U
- Authority
- CN
- China
- Prior art keywords
- coal
- electrocatalytic
- fired
- power generation
- reduction reactor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The utility model relates to a low-carbon emission system and a method for combining an electrochemical technology and a coal-fired ammonia mixing technology, comprising the following steps: the system comprises a user side, a coal-fired ammonia mixing power generation device, an electrocatalytic nitrogen reduction reactor, an electrocatalytic carbon dioxide reduction reactor and a renewable energy power generation device; the electric energy outlet, the nitrogen outlet and the carbon dioxide outlet of the coal-fired ammonia-mixing power generation device are respectively connected with the user side, the electrocatalytic nitrogen reduction reactor and the electrocatalytic carbon dioxide reduction reactor; the electric energy outlet of the renewable energy power generation device is respectively connected with the electrocatalytic nitrogen reduction reactor and the electrocatalytic carbon dioxide reduction reactor. The beneficial effects of the utility model are as follows: the utility model sets the electrocatalytic nitrogen reduction reactor and the electrocatalytic carbon dioxide reduction reactor to reduce nitrogen and carbon dioxide, thereby effectively reducing energy consumption and reducing the use of fossil fuel.
Description
Technical Field
The utility model relates to the technical field of comprehensive application of energy, in particular to a low-carbon emission system and a method for combining an electrochemical technology with a coal-fired ammonia mixing technology.
Background
In the long term, the traditional coal motor unit is gradually changed into energy sources with regulation and power-keeping properties from the current power generation main body. However, the characteristics of intermittence, volatility and the like of the current renewable energy source can greatly threaten the safety of a power grid and the energy source conservation. Therefore, the coal power and new energy optimization combination is promoted to accord with the development trend of low energy carbonization on the basis of the prior art.
With the gradual deep cleaning and transformation of the coal and electricity industry, ammonia is attracting more extensive attention in the electric power industry. Compared with hydrogen, the ammonia has lower cost per unit stored energy, higher volume energy density, easier liquefaction (-33.5 ℃), and safer and more reliable storage and transportation.
Patent CN113405116a, "a system and a control method for reducing carbon emission by CO-firing ammonia gas", discloses a system and a control method for reducing carbon emission by CO-firing ammonia gas, but does not consider the source of ammonia and the problem of treating tail gas CO 2. Patent CN114719250a, "low-carbon power generation system using new energy of green ammonia as carrier and coupling with coal-fired power plant", discloses a low-carbon power generation system using new energy of green ammonia as carrier and coupling with coal-fired power plant, however, the ammonia preparation method of the patent is that the traditional high-temperature method does not meet the standard of green environmental protection, and also fails to consider the problem of CO2 treatment generated by coal-fired power generation. The traditional ammonia synthesis needs to be carried out under the conditions of high temperature and high pressure, and does not meet the requirements of environmental protection.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art and provides a low-carbon emission system combining an electrochemical technology and a coal-fired ammonia mixing technology, which comprises the following components: the system comprises a user side, a coal-fired ammonia mixing power generation device, an electrocatalytic nitrogen reduction reactor, an electrocatalytic carbon dioxide reduction reactor and a renewable energy power generation device 5;
the electric energy outlet, the nitrogen outlet and the carbon dioxide outlet of the coal-fired ammonia-mixing power generation device are respectively connected with the user side, the electrocatalytic nitrogen reduction reactor and the electrocatalytic carbon dioxide reduction reactor; the electric energy outlet of the renewable energy power generation device 5 is respectively connected with the electrocatalytic nitrogen reduction reactor and the electrocatalytic carbon dioxide reduction reactor.
Preferably, an ammonia supplementing device is arranged between the electrocatalytic nitrogen reduction reactor and the coal-fired ammonia mixing power generation device.
Preferably, the proportion of ammonia mixed combustion in the coal-fired ammonia mixed power generation device ranges from 0% to 50%.
Preferably, the electrocatalytic nitrogen reduction reactor is a flow cell reactor comprising a proton exchange membrane, a catalyst and an electrolyte.
Preferably, the electrocatalytic carbon dioxide reduction reactor is a membrane electrode reactor (MEA) comprising a proton exchange membrane, a catalyst, an electrolyte and a gas diffusion layer.
Preferably, the renewable energy power generation device comprises a photovoltaic power generation device, a wind power generation device and a hydroelectric power generation device.
The beneficial effects of the utility model are as follows:
1. the utility model is provided with the coal-fired ammonia mixing unit to realize the ammonia mixed combustion proportion of 0-50%, and reduce CO of coal-fired power generation 2 And (5) discharging.
2. The utility model is provided with the electrochemical device driven by renewable energy sources to realize CO in the coal-fired boiler 2 And the preparation of liquid ammonia fuel, without imposing an additional carbon emission burden on the system.
3. The utility model sets the electrocatalytic nitrogen reduction reactor and the electrocatalytic carbon dioxide reduction reactor to reduce nitrogen and carbon dioxide, thereby effectively reducing energy consumption and reducing the use of fossil fuel.
Drawings
FIG. 1 is a schematic diagram of a low carbon emission system employing electrochemical technology and coal-fired ammonia mixing technology in combination;
FIG. 2 is a schematic diagram of an electrocatalytic carbon dioxide reducer provided by the present utility model;
FIG. 3 is a schematic diagram of an electrocatalytic nitrogen reducer provided by the present utility model;
reference numerals illustrate: a user terminal 1; a coal-fired ammonia-mixed power generation device 2; an electrocatalytic nitrogen reduction reactor 3; an electrocatalytic carbon dioxide reduction reactor 4; a renewable energy power generation device 5; methanol product 6.
Detailed Description
The utility model is further described below with reference to examples. The following examples are presented only to aid in the understanding of the utility model. It should be noted that it will be apparent to those skilled in the art that modifications can be made to the present utility model without departing from the principles of the utility model, and such modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.
Example 1:
the utility model utilizes electrochemical technology and renewable energy sources to carry out low-carbonization transformation on the existing coal-fired system, and realizes mutual complementation and cooperative optimization of energy sources. Specifically, the utility model provides a low-carbon emission system combining electrochemical technology and coal-fired ammonia mixing technology, as shown in fig. 1, comprising: the system comprises a user 1, a coal-fired ammonia mixing power generation device 2, an electrocatalytic nitrogen reduction reactor 3, an electrocatalytic carbon dioxide reduction reactor 4 and a renewable energy power generation device 5;
the electric energy outlet, the nitrogen outlet and the carbon dioxide outlet of the coal-fired ammonia-mixing power generation device 2 are respectively connected with the user side 1, the electrocatalytic nitrogen reduction reactor 3 and the electrocatalytic carbon dioxide reduction reactor 4; the electric energy outlet of the renewable energy power generation device 5 is respectively connected with the electrocatalytic nitrogen reduction reactor 3 and the electrocatalytic carbon dioxide reduction reactor 4.
The client 1 is a load, and includes a power consumption side such as a user. The electric energy demand of the load end is mainly supplied by the electric energy generated by the system coal-fired ammonia mixing power generation module 2.
An ammonia supplementing device is arranged between the electrocatalytic nitrogen reduction reactor 3 and the coal-fired ammonia mixing power generation device 2 and is used for supplementing the loss of ammonia caused by conversion efficiency in the system circulation process.
The mixed combustion proportion of ammonia in the coal-fired mixed ammonia power generation device 2 is 0-50%, and the mixed combustion of ammonia and coal is realized by a spray combustion method in an oxygen-enriched state, so that the effect of low carbon emission of a coal-fired unit is achieved. Ammonia in the coal-fired ammonia-mixed power generation device enters the boiler from top to bottom in a liquid spraying mode for full combustion, so that the combustion area is fully increased, and the combustion efficiency is improved. The electric energy obtained by the coal-fired ammonia mixing power generation device 2 is directly supplied to the user side 1. Nitrogen, water vapor and a small amount of carbon dioxide generated in the tail gas after complete combustion pass through a gas separation device. Carbon dioxide obtained by the reaction of the coal-fired ammonia-mixing power generation device is conveyed to an electrocatalytic carbon dioxide reactor after being separated, nitrogen is conveyed to an electrocatalytic nitrogen reduction reactor, other products such as water vapor and the like are discharged into the atmosphere after being treated, and the reaction in the device is as follows:
4NH 3 +5O 2 +2C (coal) →2N 2 +2CO 2 +6H 2 O (full combustion)
The electrocatalytic nitrogen reduction reactor 3 is a flow cell reactor comprising a proton exchange membrane, a catalyst and an electrolyte. Proton exchange membraneThe membrane prepared by the perfluorosulfonic acid-polytetrafluoroethylene copolymer is usually adopted, and the catalyst is generally loaded on carbon paper by an electrochemical deposition method, an ultrasonic spraying method and the like. Cathode catalysts include, but are not limited to, ni x -N-C, S-B/CNFs and V-TiO 2 Etc.; anode catalysts include, but are not limited to IrO 2 Ru/C, etc. The use of the electrolyte includes, but is not limited to, a methanol-KOH solution mixed electrolyte, a KOH solution, and the like.
The electrocatalytic nitrogen reduction reactor 3 also forms an electrocatalytic nitrogen reduction module with an electrolyte delivery pump, a booster fan, a gas circuit system, a product separation device and the like. The device can separate pure nitrogen from the waste flue gas of the coal-fired mixed ammonia and reduce the pure nitrogen into ammonia and oxygen through the device, and the reaction is as follows:
N 2 +3H 2 O→2NH 3 +1.5O 2
the electrocatalytic carbon dioxide reduction reactor 4 is a continuous flow type membrane electrode reactor, and the membrane electrode reactor comprises a proton exchange membrane, a catalyst, an electrolyte and a gas diffusion layer. The gas diffusion layer is mainly made of carbon cloth, carbon paper, or the like. The proton exchange membrane is usually prepared from perfluorosulfonic acid-polytetrafluoroethylene copolymer, and the catalyst is generally directly loaded on the diffusion layer by a transfer printing method, an electrochemical deposition method, an ultrasonic spraying method and the like. Cathode catalysts include, but are not limited to, transition metal-based metal macrocyclic molecular catalysts (metal macrocycles including phthalocyanine, porphyrin and derivative structures thereof), cu 2 O/Cu, etc.; anode catalysts include, but are not limited to IrO 2 Ru/C, etc. The use of electrolytes includes, but is not limited to, KHCO 3 ，NaHCO 3 Solutions, and the like.
The electrocatalytic carbon dioxide reduction reactor 4 also forms an electrocatalytic carbon dioxide reduction module with an electrolyte delivery pump, a booster fan, a gas circuit system, a gas-liquid separation device and the like. The module can separate high-concentration carbon dioxide from the waste flue gas of the coal-fired ammonia mixing, and the high-concentration carbon dioxide is conveyed into a membrane electrode reactor soaked by electrolyte through a pipeline, so that a reduction product methanol is produced, and the following reaction occurs:
CO 2 +6H + +6e - →CH 3 OH+H 2 O
the renewable energy power generation device 5 comprises a photovoltaic power generation device, a wind power generation device and a hydroelectric power generation device, and can supply power to part of devices of the system. For example, the electrical energy generated by the renewable energy power generation device 5 is used to drive the operation of the electrocatalytic nitrogen reduction reactor 3, the electrocatalytic carbon dioxide reduction reactor 4, and some separation devices in the system.
Example 2:
a low carbon emission method combining electrochemical technology and coal-fired ammonia mixing technology, comprising:
s1, a coal-fired ammonia mixing power generation device 2 realizes the mixed combustion of ammonia and coal by a spray combustion method in an oxygen-enriched state, the generated electric energy is used for supplying power to a user terminal 1, carbon dioxide obtained by the reaction of the coal-fired ammonia mixing power generation device 2 is separated and then is conveyed to an electrocatalytic carbon dioxide reactor 4, and nitrogen is conveyed to an electrocatalytic nitrogen reduction reactor 3;
s2, a renewable energy power generation device 5 supplies power to the electrocatalytic nitrogen reduction reactor 3 and the electrocatalytic carbon dioxide reduction reactor 4, and electrolyte is introduced into the electrocatalytic nitrogen reduction reactor 3 and the electrocatalytic carbon dioxide reduction reactor 4; the electrocatalytic carbon dioxide reactor 4 produces a reduction product methanol product 6; the electrocatalytic nitrogen reduction reactor 3 reduces nitrogen to ammonia and oxygen;
s3, separating products of the electrocatalytic carbon dioxide reactor 4 and the electrocatalytic nitrogen reduction reactor 3.
In S2, the electrocatalytic carbon dioxide reduction reactor 4 introduces 0.1M NaHCO 3 The solution was used as an electrolyte. The electrocatalytic nitrogen reduction reactor 3 was charged with a mixed electrolyte of methanol-KOH solution (KOH solution concentration of 0.1M, water volume percentage of 0.16%) as electrolyte.
In S2, when the output of the renewable energy power generation device 5 is insufficient, the coal-fired ammonia mixing power generation device 2 is adopted to provide electric energy for the electrocatalytic nitrogen reduction reactor 3 and the electrocatalytic carbon dioxide reduction reactor 4.
S3 comprises the following steps:
s301, separating the product of the electrocatalytic carbon dioxide reactor 4 into unreacted complete carbon dioxide and a methanol product 6; unreacted carbon dioxide is conveyed into the electrocatalytic carbon dioxide reactor 4 again for circulation; a part of the methanol product 6 is used as an electrolyte for electrocatalytic nitrogen reduction reaction, and the rest is output as a system product;
s302, separating the product of the electrocatalytic nitrogen reduction reactor 3 into nitrogen, oxygen and liquid ammonia which are not completely reacted; the unreacted nitrogen is again fed into the electrocatalytic nitrogen reduction reactor 3 for recycling; oxygen is conveyed into the coal-fired ammonia mixing power generation device 2 to maintain the oxygen-enriched environment of the power generation device; the liquid ammonia product is fed as fuel into the coal-fired ammonia-mixed power generation device 2.
Example 3:
the embodiment of the application provides a schematic diagram of an apparatus for an electrocatalytic carbon dioxide reduction reactor 4 in a low carbon emission system, wherein the reactor is a membrane electrode reactor, as shown in fig. 2. The main part includes gas diffusion electrode, ion exchange membrane, electrolyte, etc. After the high-concentration CO2 in the coal-fired ammonia-mixed power generation device is separated, the high-concentration CO2 is introduced from A-1 through wetting treatment, and the electrolyte is introduced from A-3. Through the reaction, the main liquid product and unreacted CO2 are discharged from A-2, and the electrolyte and O2 generated by the anode are discharged from A-4.
Example 4:
the present embodiment provides a schematic diagram of an apparatus for an electrocatalytic nitrogen reduction reactor 3 in a low carbon exhaust system, the reactor is as shown in fig. 3, and the main part of the reactor comprises an ion exchange membrane, an electrode, an electrolyte and the like. N2 which is separated and purified in the coal-fired ammonia-mixing power generation device is introduced from B-1, reduced to NH3 on a cathode, separated and discharged from B-2. Electrolyte enters from the B-4 and B-5 channels, the anode mainly generates OER reaction, and O2 and electrolyte generated are discharged from the B-3.
Claims (6)
1. The low-carbon emission system combining the electrochemical technology and the coal-fired ammonia mixing technology is characterized by comprising the following components: the system comprises a user side (1), a coal-fired ammonia mixing power generation device (2), an electrocatalytic nitrogen reduction reactor (3), an electrocatalytic carbon dioxide reduction reactor (4) and a renewable energy power generation device (5);
the electric energy outlet, the nitrogen outlet and the carbon dioxide outlet of the coal-fired ammonia-mixing power generation device (2) are respectively connected with the user end (1), the electrocatalytic nitrogen reduction reactor (3) and the electrocatalytic carbon dioxide reduction reactor (4); the electric energy outlet of the renewable energy power generation device (5) is respectively connected with the electrocatalytic nitrogen reduction reactor (3) and the electrocatalytic carbon dioxide reduction reactor (4).
2. The low-carbon emission system combining electrochemical technology with coal-fired ammonia mixing technology according to claim 1, wherein an ammonia supplementing device is arranged between the electrocatalytic nitrogen reduction reactor (3) and the coal-fired ammonia mixing power generation device (2).
3. The low-carbon emission system combining electrochemical technology and coal-fired ammonia mixing technology according to claim 1, wherein the ammonia mixing ratio in the coal-fired ammonia mixing power generation device (2) is in the range of 0-50%.
4. The low carbon emission system for use in combination with coal-fired ammonia mixing technology according to claim 1, wherein the electrocatalytic nitrogen reduction reactor (3) is a flow cell reactor comprising a proton exchange membrane, a catalyst and an electrolyte.
5. The low carbon emission system combining electrochemical technology with coal-fired ammonia mixing technology according to claim 1, wherein the electrocatalytic carbon dioxide reduction reactor (4) is a membrane electrode reactor comprising a proton exchange membrane, a catalyst, an electrolyte and a gas diffusion layer.
6. The low-carbon emission system combining electrochemical technology with coal-fired ammonia mixing technology according to claim 1, characterized in that the renewable energy power generation device (5) comprises a photovoltaic power generation device, a wind power generation device and a hydro power generation device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223250703.9U CN219160348U (en) | 2022-12-06 | 2022-12-06 | Low-carbon emission system combining electrochemical technology and coal-fired ammonia mixing technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223250703.9U CN219160348U (en) | 2022-12-06 | 2022-12-06 | Low-carbon emission system combining electrochemical technology and coal-fired ammonia mixing technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219160348U true CN219160348U (en) | 2023-06-09 |
Family
ID=86637617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223250703.9U Active CN219160348U (en) | 2022-12-06 | 2022-12-06 | Low-carbon emission system combining electrochemical technology and coal-fired ammonia mixing technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219160348U (en) |
-
2022
- 2022-12-06 CN CN202223250703.9U patent/CN219160348U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109921060B (en) | System and method for storing electricity and preparing synthesis gas based on solid oxide battery | |
| CN215578650U (en) | Solid oxide fuel cell and proton exchange membrane fuel cell hybrid system using ammonia gas as fuel | |
| CN105084311A (en) | Zero-carbon-emission hydrogen production system by methanol water reforming as well as application and hydrogen production method thereof | |
| CN205222680U (en) | Methanol -water reformation hydrogen production system that zero carbon discharged and fuel cell car thereof | |
| CN115036539B (en) | Fuel cell power generation system and control method thereof | |
| CN208955118U (en) | A kind of solid oxide fuel cell exhaust treatment system based on electrolytic tank of solid oxide | |
| CN114395775A (en) | Closed clean energy hydrogen production energy storage system | |
| CN113451612B (en) | Green and efficient power-ammonia-power energy system | |
| CN110273161B (en) | Electrolytic ammonia hydrogen production system | |
| CN101330145A (en) | Portable fuel cell system | |
| CN115838937A (en) | Low-carbon emission system and method combining electrochemical technology and coal-fired ammonia mixing technology | |
| CN114725428A (en) | Zero-carbon-emission solid oxide fuel cell and renewable energy source combined power generation system with ammonia gas as carrier | |
| CN113506902A (en) | Solid oxide fuel cell and proton exchange membrane fuel cell hybrid system using ammonia gas as fuel | |
| CN204289608U (en) | There is the hydrogen gas generating system of air humidity regulatory function | |
| CN101304098B (en) | Solid-oxide fuel battery system with solid state carbon-based compound as fuel body | |
| CN219160348U (en) | Low-carbon emission system combining electrochemical technology and coal-fired ammonia mixing technology | |
| CN115354345A (en) | Photovoltaic photo-thermal coupling co-electrolysis combined garbage power generation comprehensive energy system and process method thereof | |
| CN114032570B (en) | Carbon-assisted solid oxide electrolytic cell | |
| JP2004171802A (en) | Fuel cell system | |
| CN114990595A (en) | Hydrogen production system | |
| CN108808041A (en) | Biomass direct generation of electricity fuel cell and CO2Utilize system and method | |
| CN210736904U (en) | Ammonia electrolysis hydrogen production system | |
| CN113890091A (en) | Method for solving building photovoltaic consumption problem by utilizing hydrogen storage system | |
| CN114243067A (en) | Direct carbon fuel cell | |
| CN219441225U (en) | System for utilize green hydrogen system ammonia to realize flue gas denitration |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |