CN208430065U - The system of blast furnace gas synthesis ammonia or urea is utilized based on chemical chain reaction - Google Patents
The system of blast furnace gas synthesis ammonia or urea is utilized based on chemical chain reaction Download PDFInfo
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- CN208430065U CN208430065U CN201820776057.4U CN201820776057U CN208430065U CN 208430065 U CN208430065 U CN 208430065U CN 201820776057 U CN201820776057 U CN 201820776057U CN 208430065 U CN208430065 U CN 208430065U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The utility model relates to clean energy resourcies and energy-saving and emission-reduction field, provide a kind of system for synthesizing ammonia or urea using blast furnace gas based on chemical chain reaction, and in the oxygen carrier of fuel reactor and oxidation state reduction reaction occurs for blast furnace gas；In the oxygen carrier of hydrogen-manufacturing reactor and reduction-state oxidation reaction occurs for vapor；Oxygen carrier recycles between fuel reactor, hydrogen-manufacturing reactor；Fuel reactor exit gas obtains pure CO2 through heat exchanger and CO2 separator；Hydrogen-manufacturing reactor exit gas obtains pure H2 by heat exchanger and condenser；Air separation plant making pure N2 synthesizes ammonia with pure H2；With pure CO2 urea synthesis.The utility model efficiently uses low calorie fuels blast furnace gas hydrogen making, and ammonia is synthesized using hydrogen and superfluous nitrogen, and gained carbon dioxide after the product separation of fuel reactor, it can be used for urea synthesis again, energy-saving and emission-reduction are not only advantageous to, and realize the resource utilization of blast furnace gas and superfluous nitrogen.
Description
Technical field
It is utilized the utility model relates to clean energy resource and energy-conserving and emission-cutting technology field, in particular to one kind is anti-based on chemical chain
The system for synthesizing ammonia or urea using blast furnace gas answered.
Background technique
Blast furnace gas is the fuel gas of by-product in blast furnace ironmaking production process.Its approximate composition is carbon dioxide 6-
15%, carbon monoxide 25-33%, hydrogen 1-4%, nitrogen 55-60%, hydro carbons 0.2-0.5% and a small amount of sulfur dioxide.Calorific value is only
3500KJ/m3;Left and right.Fuel, the kind of the refined pig iron and smelting process used in the ingredient and calorific value and blast furnace of blast furnace gas
It is related, modern ironmaking production generally use big volume, high wind-warm syndrome, high smelting intensity, high Coal powder spray amount production technology, use
These advanced production technologies improve labor productivity and reduce energy consumption, but produced blast furnace gas calorific value is lower, increases
Utilize difficulty.
The theoretical temperature combustion of blast furnace gas is relatively low, and the ignition point of blast furnace gas is not high, and there is no the obstacles of kindling, but
During Actual combustion, since its calorific value is lower, burning velocity is slow, combustion instability.Exist in blast furnace gas a large amount of
CO2, N2 are not involved in chemical reaction in combustion process substantially, and almost equivalent is transferred in the flue gas that burning generates, and fire blast furnace gas
The exhaust gas volumn of generation is far more than fire coal.
The characteristics of low combustion value furnace gas is that combustible component is low, and combustion instability, ignition temperature is low, and exhaust gas volumn is big.Flame
Stablize the safety for being directly related to burning, the measure of stable overheavy firing is generally used to low-heat value gas, such as using high
Intermediate temperature regenerator formula combustion technology is to blast furnace gas and the double preheatings of combustion air etc..Another method is exactly to improve calorific value, by its with
Coke-stove gas blends to form " mixed gas ", for the personal combustion gas of smelter, such as heats steel ingot, the preheating steel ladle of hot rolling
Deng.Fuel of the Ye You part iron enterprise in addition to being used as blast funnace hot blast stove, most blast furnace gases are all with the shape of " point day lamp "
Formula release is fallen.
For iron and steel enterprise, coke-stove gas is a kind of high-grade fuel, it is mixed with blast furnace gas actually reduces
Its quality, and high-temperature thermal storage type combustion technology is also due to cost reason is widely used, blast furnace gas directly diffuses not
But waste of energy and there is exhaust emission, it is therefore necessary to seek the technological means for more efficiently utilizing blast furnace gas.
On the other hand, it is typically provided air separation unit in iron and steel enterprise for oxygen processed, provides pure oxygen for pneumatic steelmaking, and space division
Another product, that is, high-purity nitrogen, other than it can sell on the market liquid nitrogen and high pure nitrogen, significant portion nitrogen is opposite
It is superfluous, it is also desirable to which that reasonable manner is efficiently used.
Burning chemistry chains (Chemical Looping Combustion, CLC) are used as a kind of new combustion mode, tool
There is superior CO2 stalling characteristic, the basic principle is that by means of the effect of the carrier of oxygen (oxygen carrier) by combustion process
2 gas-solid reactions are decomposed into, the oxygen in air is passed to by fuel by oxygen carrier using two reactors, carries out fuel
Non-flaming combustion, as shown in Figure 1.The burning effect that CLC can not only avoid the generation of NOx when fuel conventional combustion, improve fuel
Rate, and reaction product when fuel converts completely only includes that CO2 and vapor pass through without additional separator and measure
Simple condensation process can be obtained by high-purity CO2, handle convenient for subsequent storage.
Separation characteristic in CO2 based on CLC becomes a current research hotspot using CLC hydrogen manufacturing.Hydrogen production of chemical chain mistake
Journey (CLH) introduces air reactor instead of air as oxidant to complete the regeneration of the carrier of oxygen, while water vapour with vapor
It is reduced generation hydrogen, as shown in Figure 2.Water-gas shift reaction (WGS) hydrogen manufacturing by synthesis gas is the main way of hydrogen gas production
One of diameter, but due to the limitation of synthesis gas production process, the H2 produced by this method separated with CO2 it is relatively difficult, and
The energy consumption and higher cost of Water-gas shift reaction process, and CLH then can preferably solve the problems, such as this.
Utility model content
The purpose of this utility model is exactly to have overcome the deficiencies of the prior art and provide a kind of utilization based on chemical chain reaction
The system that blast furnace gas synthesizes ammonia or urea efficiently uses blast furnace gas and superfluous nitrogen in iron and steel enterprise, is not only advantageous to
Energy-saving and emission-reduction, and realize the resource utilization of blast furnace gas and superfluous nitrogen.
The technical solution of the utility model is as follows:
A kind of system for synthesizing ammonia or urea using blast furnace gas based on chemical chain reaction, including fuel reactor, system
Hydrogen reactor, CO2 separator, air separation plant, ammonia synthesis reactor, reactor for synthesis of urea；
First pipeline of conveying blast furnace is connect with the fuel reactor bottom, for conveying the fuel reactor
Second pipeline of exit gas is connect after heat exchanger with the entrance of the CO2 separator, the outlet of the CO2 separator with
The reactor for synthesis of urea pipeline connection；
Vapor enters pipeline and connect with the hydrogen-manufacturing reactor bottom, for conveying the hydrogen-manufacturing reactor exit gas
Third pipeline successively connect after heat exchanger, condenser with the entrance of the ammonia synthesis reactor, the ammonia synthesis reactor
Outlet connect with the reactor for synthesis of urea pipeline；
The oxygen carrier circulation canal of diconnected is provided between the fuel reactor, hydrogen-manufacturing reactor.
Burning chemistry chains are collectively formed in the fuel reactor, hydrogen-manufacturing reactor；Blast furnace gas enters the combustion from lower part
Expect reactor, reduction reaction occurs with the oxygen carrier of oxidation state, oxygen carrier is reduced, and is converted into reduction-state oxygen carrier；The combustion
Expect that reactor outlet gas ingredient is nitrogen, CO2 and H2O；Vapor is passed through from the hydrogen-manufacturing reactor lower part, with reduction-state
Oxidation reaction occurs for oxygen carrier, and oxygen carrier is oxidized, and is converted into oxidation state oxygen carrier；The hydrogen-manufacturing reactor exit gas is H2
With the mixture of vapor；Oxygen carrier is realized between the fuel reactor, hydrogen-manufacturing reactor and is recycled；
The fuel reactor exit gas obtains pure CO2 through heat exchanger and CO2 separator；The hydrogen-manufacturing reactor goes out
Gas passes through heat exchanger and condenser, obtains pure H2；
The pure N2 that the air separation plant is produced pressurizes after mixing in the ammonia synthesis reactor with the pure H2 and heats up, hair
The reaction of intercrescence ammonification, generates ammonia；
The ammonia mixes increasing temperature and pressure, urea synthesis with the pure CO2 in the reactor for synthesis of urea.
Further, the fuel reactor, hydrogen-manufacturing reactor are respectively any of fixed bed, fluidized bed or moving bed
Kind.
Further, the oxygen carrier is metal oxide oxygen carrier or the nonmetallic oxygen carrier of sulfate.
Further, the metal oxide oxygen carrier is iron ore or the oxygen carrier for preparing by raw material of iron ore.
Further, the CO2 separator is using solution absorption pattern, pressure-variable adsorption mode or cooling separate mode.
Further, ammonia synthesis reaction occurs under the conditions of the ammino is grown up to be a useful person existing for the high temperature and pressure and catalyst, urges
Agent is iron.
Further, heat exchanger recycling fuel reactor, hydrogen-manufacturing reactor exit gas high temperature heat, be used for
Heating or preheating.
The utility model additionally provides a kind of method for synthesizing ammonia or urea using blast furnace gas based on chemical chain reaction,
Include:
Blast furnace gas enters fuel reactor from lower part, reduction reaction occurs with the oxygen carrier of oxidation state, oxygen carrier is gone back
Original is converted into reduction-state oxygen carrier；The fuel reactor exit gas ingredient is nitrogen, CO2 and H2O；Vapor is from hydrogen manufacturing
Reactor lower part is passed through, and oxidation reaction occurs with the oxygen carrier of reduction-state, oxygen carrier is oxidized, and is converted into oxidation state oxygen carrier；
The hydrogen-manufacturing reactor exit gas is the mixture of H2 and vapor；Oxygen carrier is in the fuel reactor, hydrogen-manufacturing reactor
Between realize and recycle；Burning chemistry chains are collectively formed in the fuel reactor, hydrogen-manufacturing reactor；
The fuel reactor exit gas obtains pure CO2 through heat exchanger and CO2 separator；The hydrogen-manufacturing reactor goes out
Gas passes through heat exchanger and condenser, obtains pure H2；
The pure N2 that the air separation plant is produced pressurizes after mixing in the ammonia synthesis reactor with the pure H2 and heats up, hair
The reaction of intercrescence ammonification, generates ammonia；
The ammonia mixes increasing temperature and pressure, urea synthesis with the pure CO2 in the reactor for synthesis of urea.
The utility model has the following beneficial effects: being effectively utilized blast furnace coal compared with original blast furnace gas Land use systems
The energy that gas contains reduces the discharge using a large amount of flue gases brought by high temperature air combustion technology, avoids blending coke oven
The quality of coke-stove gas caused by coal gas use reduces；Meanwhile utilizing the superfluous nitrogen of the hydrogen and iron and steel enterprise's by-product produced
Gas synthesizes ammonia, and the enrichment of CO2 is realized using the product of chemical chain reaction, may be used as the original of urea synthesis after separating-purifying
Material, it is achieved that the comprehensive utilization of resources of energy-saving and emission-reduction and blast furnace gas.
Detailed description of the invention
Fig. 1 show burning chemistry chains schematic illustration.
Fig. 2 show burning chemistry chains schematic illustration employed in the utility model.
Fig. 3 show a kind of utilization blast furnace gas synthesis ammonia or urea based on chemical chain reaction of the utility model embodiment
System structural schematic diagram.
In figure: 1- fuel reactor；2- oxidation state oxygen carrier (MexOy)；3- hydrogen-manufacturing reactor；4- reduction-state oxygen carrier
(MexOy-1)；The first pipeline of 5-；The second pipeline of 6-；7- vapor enters pipeline；8- third pipeline；9- heat exchanger；10-CO2 points
From device；11- condenser；12- air separation unit；13- ammonia synthesis reactor；14- catalyst；15- reactor for synthesis of urea.
Specific embodiment
The utility model specific embodiment is described in detail below in conjunction with specific attached drawing.It should be noted that following implementations
Example described in technical characteristic or technical characteristic combination be not construed as it is isolated, they can be combined with each other from
And reach superior technique effect.In the drawings of the following embodiments, the identical label that each attached drawing occurs represents identical spy
Sign or component, can be apply to different embodiments.
As shown in figure 3, the utility model embodiment is a kind of to utilize blast furnace gas synthesis ammonia or urine based on chemical chain reaction
The system of element, including fuel reactor 1, hydrogen-manufacturing reactor 3, CO2 separator 10, air separation plant 12, ammonia synthesis reactor 13, urine
Plain synthesis reactor 15；Burning chemistry chains are collectively formed in the fuel reactor 1, hydrogen-manufacturing reactor 3；Blast furnace gas is logical from lower part
It crosses the first pipeline 5 and enters the fuel reactor 1, the 2 (Me of oxygen carrier with oxidation statexOy) reduction reaction occurs, oxygen carrier is gone back
Original is converted into 4 (Me of reduction-state oxygen carrierxOy-1)；The 1 exit gas ingredient of fuel reactor is nitrogen, CO2 and H2O；Water
Steam enters pipeline 7 by vapor and is passed through from 3 lower part of hydrogen-manufacturing reactor, and it is anti-that oxidation occurs with the oxygen carrier 4 of reduction-state
It answers, oxygen carrier is oxidized, and is converted into oxidation state oxygen carrier 2；3 exit gas of hydrogen-manufacturing reactor is the mixing of H2 and vapor
Object；Oxygen carrier is realized between the fuel reactor 1, hydrogen-manufacturing reactor 3 and is recycled；Oxygen carrier transmits between reactor
While also achieve the transmitting of heat.Oxygen carrier is metal oxide oxygen carrier or the nonmetallic oxygen carrier of sulfate, metal oxygen
The oxygen carrier that compound oxygen carrier is preferentially selected iron ore or prepared using iron ore as raw material.
1 exit gas of fuel reactor (nitrogen, CO2 and H2O) is separated by the second pipeline 6 through heat exchanger 9 and CO2
Device 10 obtains pure CO2；3 exit gas of hydrogen-manufacturing reactor (mixture of H2 and vapor) passes through heat exchanger 9 and condenser
After 11 condense vapor, pure H2 is obtained；The heat exchanger 9 recycles the exit gas of fuel reactor 1, hydrogen-manufacturing reactor 3
High temperature heat, for heating or preheating.
The pure H2 that the pure N2 and hydrogen-manufacturing reactor 3 that the air separation plant 12 is produced are obtained is in the ammonia synthesis reactor 13
It pressurizes and heats up after mixing, ammonia synthesis reaction occurs, generate ammonia；Preferably, the ammino is grown up to be a useful person deposits in high temperature and pressure and catalyst
Ammonia synthesis reaction occurs under the conditions, catalyst is iron；The pure CO2 that ammonia and the CO2 separator 10 obtain is in the urea
Increasing temperature and pressure, urea synthesis are mixed in synthesis reactor 15.
Preferably, the fuel reactor 1, hydrogen-manufacturing reactor 3 can be respectively appointing for fixed bed, fluidized bed or moving bed
A kind of or combination.
Preferably, the CO2 separator 10 is using solution absorption pattern, pressure-variable adsorption mode or cooling separate mode.
A method of ammonia or urea are synthesized using blast furnace gas based on chemical chain reaction, comprising:
Blast furnace gas enters fuel reactor 1 from lower part, and reduction reaction, oxygen carrier quilt occurs with the oxygen carrier 2 of oxidation state
Reduction, is converted into reduction-state oxygen carrier 4；The 1 exit gas ingredient of fuel reactor is nitrogen, CO2 and H2O；Vapor from
3 lower part of hydrogen-manufacturing reactor is passed through, and oxidation reaction occurs with the oxygen carrier 4 of reduction-state, and oxygen carrier is oxidized, and is converted into oxidation state load
Oxysome 2；3 exit gas of hydrogen-manufacturing reactor is the mixture of H2 and vapor；Oxygen carrier is in the fuel reactor 1, system
It realizes and recycles between hydrogen reactor 3；The fuel reactor 1, hydrogen-manufacturing reactor 3 are based on chemical chain reaction principle；
1 exit gas of fuel reactor obtains pure CO2 through heat exchanger 9 and CO2 separator 10；The hydrogen production reaction
3 exit gas of device passes through heat exchanger 9 and condenser 11, obtains pure H2；
The pure N2 that the air separation plant 12 is produced pressurizes after mixing in the ammonia synthesis reactor 13 with the pure H2 and rises
Ammonia synthesis reaction occurs for temperature, generates ammonia；
The ammonia mixes increasing temperature and pressure, urea synthesis in the reactor for synthesis of urea 15 with the pure CO2.
The utility model is intended to efficiently use blast furnace gas and superfluous nitrogen in iron and steel enterprise, provides one kind and is able to achieve height
Producer gas hydrogen production of chemical chain simultaneously utilizes superfluous nitrogen synthesis ammonia or the new process of urea；It the advantage is that effective use low heat value combustion
Expect blast furnace gas hydrogen making, and synthesizes ammonia using hydrogen and superfluous nitrogen, and gained two after the separation of the product of fuel reactor
Carbonoxide, and can be used for urea synthesis, energy-saving and emission-reduction are not only advantageous to, and realize the money of blast furnace gas and superfluous nitrogen
Sourceization utilizes.
Although having been presented for several embodiments of the utility model herein, those skilled in the art should be managed
Solution, in the case where not departing from the spirit of the present invention, can be changed the embodiments herein.Above-described embodiment only shows
Example property, it should not be using the embodiments herein as the restriction of the utility model interest field.
Claims (6)
1. a kind of system for synthesizing ammonia or urea using blast furnace gas based on chemical chain reaction, which is characterized in that including fuel
Reactor, hydrogen-manufacturing reactor, CO2 separator, air separation plant, ammonia synthesis reactor, reactor for synthesis of urea；
First pipeline of conveying blast furnace is connect with the fuel reactor bottom, for conveying the fuel reactor outlet
Second pipeline of gas is connect after heat exchanger with the entrance of the CO2 separator, the outlet of the CO2 separator with it is described
The connection of reactor for synthesis of urea pipeline；
Vapor enters pipeline and connect with the hydrogen-manufacturing reactor bottom, for conveying the of the hydrogen-manufacturing reactor exit gas
Three pipelines are successively connect after heat exchanger, condenser with the entrance of the ammonia synthesis reactor, and the ammonia synthesis reactor goes out
Mouth is connect with the reactor for synthesis of urea pipeline；
The oxygen carrier circulation canal of diconnected is provided between the fuel reactor, hydrogen-manufacturing reactor.
2. the system for synthesizing ammonia or urea using blast furnace gas based on chemical chain reaction as described in claim 1, feature
It is, the fuel reactor, hydrogen-manufacturing reactor are respectively any of fixed bed, fluidized bed or moving bed.
3. the system for synthesizing ammonia or urea using blast furnace gas based on chemical chain reaction as described in claim 1, feature
It is, the oxygen carrier is metal oxide oxygen carrier or the nonmetallic oxygen carrier of sulfate.
4. the system for synthesizing ammonia or urea using blast furnace gas based on chemical chain reaction as claimed in claim 3, feature
It is, the metal oxide oxygen carrier is iron ore or the oxygen carrier for preparing by raw material of iron ore.
5. the system for synthesizing ammonia or urea using blast furnace gas based on chemical chain reaction as described in claim 1, feature
It is, the CO2 separator is using solution absorption pattern, pressure-variable adsorption mode or cooling separate mode.
6. the system for synthesizing ammonia or urea using blast furnace gas based on chemical chain reaction as described in claim 1, feature
It is, under the conditions of growing up to be a useful person existing for the high temperature and pressure and catalyst ammonia synthesis reaction occurs for the ammino, and catalyst is iron.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820776057.4U CN208430065U (en) | 2018-05-23 | 2018-05-23 | The system of blast furnace gas synthesis ammonia or urea is utilized based on chemical chain reaction |
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| CN201820776057.4U CN208430065U (en) | 2018-05-23 | 2018-05-23 | The system of blast furnace gas synthesis ammonia or urea is utilized based on chemical chain reaction |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115403010A (en) * | 2022-08-02 | 2022-11-29 | 北京科技大学 | Method and system for purifying and recovering hydrogen in tail gas of nitrogen-hydrogen protective gas in cold rolling process |
| CN115571855A (en) * | 2022-11-07 | 2023-01-06 | 中冶南方工程技术有限公司 | Converter gas resource utilization method |
| CN115786607A (en) * | 2022-11-15 | 2023-03-14 | 中冶赛迪工程技术股份有限公司 | Blowing method and system |
-
2018
- 2018-05-23 CN CN201820776057.4U patent/CN208430065U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115403010A (en) * | 2022-08-02 | 2022-11-29 | 北京科技大学 | Method and system for purifying and recovering hydrogen in tail gas of nitrogen-hydrogen protective gas in cold rolling process |
| CN115403010B (en) * | 2022-08-02 | 2024-01-30 | 北京科技大学 | Method and system for purifying and recovering hydrogen in tail gas of nitrogen-hydrogen protective gas in cold rolling process |
| CN115571855A (en) * | 2022-11-07 | 2023-01-06 | 中冶南方工程技术有限公司 | Converter gas resource utilization method |
| CN115786607A (en) * | 2022-11-15 | 2023-03-14 | 中冶赛迪工程技术股份有限公司 | Blowing method and system |
| CN115786607B (en) * | 2022-11-15 | 2024-03-26 | 中冶赛迪工程技术股份有限公司 | Blowing method and system |
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