CN210656142U - Thermal cracking hydrogen production device for assisting ammonia combustion - Google Patents
Thermal cracking hydrogen production device for assisting ammonia combustion Download PDFInfo
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- CN210656142U CN210656142U CN201921733610.7U CN201921733610U CN210656142U CN 210656142 U CN210656142 U CN 210656142U CN 201921733610 U CN201921733610 U CN 201921733610U CN 210656142 U CN210656142 U CN 210656142U
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- ammonia
- heat exchange
- heat exchanger
- tube bundle
- exchange coil
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
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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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
The utility model relates to an ammonia fuel heat supply technical field, concretely relates to thermal cracking hydrogen plant of supplementary ammonia burning. The utility model provides a thermal cracking hydrogen production device for assisting ammonia combustion, which comprises a combustion chamber (8), a tube bundle type cross flow heat exchanger (5), a heat exchange coil and an ammonia combustor (9); the tube bundle type cross-flow heat exchanger (5) and the heat exchange coil are arranged inside the combustion chamber (8); the ammonia burner (9) is communicated with the air inlet of the combustion chamber (8); and the gas outlet of the tube bundle type cross-flow heat exchanger (5) is connected with an ammonia combustor (9). The device provided by the utility model compact structure, heat exchange efficiency is high, utilizes the ammonia burning to the air current waste heat after the heat transfer coil pipe heat supply, provides the heat for ammonia cracking process in the tube bank, and the hydrogen-nitrogen-ammonia mist that the ammonia produced after the thermal cracking can regard as ammonia fuel's combustion improver, realizes the sustained and stable burning of ammonia.
Description
Technical Field
The utility model relates to an ammonia fuel heat supply technical field, concretely relates to thermal cracking hydrogen plant of supplementary ammonia burning.
Background
The ammonia is prepared from hydrogen and nitrogen which can be obtained from water and air, and the products after complete combustion are nitrogen and water, and is a renewable clean fuel. China is the country with the highest annual ammonia yield in the world, and is expected to use ammonia as fuel in small and medium-sized heat supply gas boilers to achieve the aim of clean heat supply in China. However, because the energy required for ignition of ammonia is high, the flame propagation speed is slow during combustion, and a combustion improver is required to keep continuous and stable combustion of ammonia under normal conditions.
In the prior art, in the process of supplying heat to the outside by ammonia combustion, a small amount of ammonia is cracked by utilizing partial heat in a combustion chamber through reasonable layout, and hydrogen generated by cracking can be used as a combustion improver during ammonia combustion, so that continuous and stable combustion of ammonia is realized. Chinese patent CN 201512408U provides a hydrogen production device for ammonia cracking furnace, which uses the heat of diesel oil or natural gas combustion to crack ammonia to produce hydrogen, and supplies hydrogen on line for chemical process. However, the heat of combustion of diesel oil or natural gas in the device is only used for cracking ammonia to produce hydrogen, so that part of the heat cannot be fully utilized.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a thermal cracking hydrogen production device for assisting ammonia combustion. The utility model integrates the ammonia pyrolysis hydrogen production device with the ammonia combustion device, overcomes the problems of difficult layout and energy which can not be effectively utilized in multiple stages, and utilizes redundant heat to supply heat to the outside when guaranteeing the continuous and stable combustion of ammonia.
In order to realize the purpose of the utility model, the utility model provides a following technical scheme:
the utility model provides a thermal cracking hydrogen production device for assisting ammonia combustion, which comprises a combustion chamber 8, a tube bundle type cross flow heat exchanger 5, a heat exchange coil and an ammonia combustor 9; the tube bundle type cross-flow heat exchanger 5 and the heat exchange coil are arranged inside the combustion chamber 8; the ammonia burner 9 is communicated with the air inlet of the combustion chamber 8; the gas outlet of the tube bundle type cross-flow heat exchanger 5 is connected with an ammonia burner 9.
Preferably, the thermal cracking hydrogen production device with auxiliary ammonia combustion further comprises a main ammonia conveying pipe 2-1 and a branch ammonia conveying pipe 2-2, and the ammonia combustor 9 is connected with an ammonia source through the main ammonia conveying pipe 2-1; the tube bundle type cross-flow heat exchanger 5 is connected with an ammonia source through a branch ammonia conveying pipe 2-2.
Preferably, an ammonia flow meter 1 is further arranged on the branch ammonia conveying pipe 2-2.
Preferably, the branch ammonia conveying pipe 2-2 is further provided with a check valve 3, and the check valve 3 is arranged between the ammonia flow meter 1 and the tube bundle type cross-flow heat exchanger 5.
Preferably, a shell-and-tube preheater 4 is further arranged on the branch ammonia conveying pipe 2-2, and the shell-and-tube preheater 4 is arranged between the check valve 3 and the tube bundle type cross-flow heat exchanger 5.
Preferably, the shell-and-tube preheater 4 is disposed externally above the combustion chamber 8.
Preferably, the heat exchange coil comprises a first heat exchange coil 7 and a second heat exchange coil 6, and the first heat exchange coil 7 is arranged at the middle lower part of the combustion chamber 8; the second heat exchange coil 6 is arranged at the top of the combustion chamber 8; the tube bundle type cross-flow heat exchanger 5 is arranged between the first heat exchange coil 7 and the second heat exchange coil 6.
Preferably, the temperature of the position where the first heat exchange coil 7 is located is 1073-1873K; the temperature of the second heat exchange coil 6 is 473-973K, and the temperature of the tube bundle type cross-flow heat exchanger 5 is 973-1073K.
Preferably, the gas outlet of the tube bundle type cross-flow heat exchanger 5 is connected with a nozzle connecting port 10 of an ammonia burner 9.
The utility model provides a thermal cracking hydrogen production device for assisting ammonia combustion, which comprises a combustion chamber 8, a tube bundle type cross flow heat exchanger 5, a heat exchange coil and an ammonia combustor 9; the tube bundle type cross-flow heat exchanger 5 and the heat exchange coil are arranged inside the combustion chamber 8; the ammonia burner 9 is communicated with the air inlet of the combustion chamber 8; the gas outlet of the tube bundle type cross-flow heat exchanger 5 is connected with an ammonia burner 9. In the utility model, ammonia gas enters the tube bundle type cross flow heat exchanger 5 and is cracked to generate hydrogen-nitrogen-ammonia mixed gas which can be used as a combustion improver for ammonia combustion; ammonia gas, hydrogen-nitrogen-ammonia mixed gas as a combustion improver and air are fully mixed and ignited in an ammonia burner 9 and are combusted in a combustion chamber 8; and part of heat generated by combustion is used for cracking ammonia in the tube bundle type cross-flow heat exchanger 5, and part of heat is used for heating water in the heat exchange coil to supply heat outwards, so that multistage effective utilization of heat is realized. The utility model provides a thermal cracking hydrogen plant of supplementary ammonia burning each part is rationally distributed, when guaranteeing ammonia sustained stable combustion, utilizes unnecessary heat to external heat supply, suitable popularization and application.
Drawings
FIG. 1 is a schematic structural diagram of a thermal cracking hydrogen production apparatus for assisting ammonia combustion according to the present invention;
the ammonia combustor comprises a shell-and-tube preheater 1, a tube bundle cross-flow heat exchanger 5, a second heat exchange coil 6, a first heat exchange coil 7, a combustion chamber 8, an ammonia combustor 9 and an ammonia combustor 10, wherein the ammonia combustor 1 is an ammonia flowmeter, the ammonia combustor 2-1 is a main ammonia pipeline, the ammonia combustor 2-2 is a branch ammonia pipeline, the check valve 3 is a check valve, the shell-and-tube preheater 4 is a shell-and-tube preheater, the tube bundle cross-flow heat exchanger 6 is a second heat exchange coil, the first heat.
Detailed Description
The utility model provides a thermal cracking hydrogen production device for assisting ammonia combustion, which comprises a combustion chamber 8, a tube bundle type cross flow heat exchanger 5, a heat exchange coil and an ammonia combustor 9; the tube bundle type cross-flow heat exchanger 5 and the heat exchange coil are arranged inside the combustion chamber 8; the ammonia burner 9 is communicated with the air inlet of the combustion chamber 8; the gas outlet of the tube bundle type cross-flow heat exchanger 5 is connected with an ammonia burner 9.
The device provided by the utility model comprises a combustion chamber 8, the utility model discloses in, the ammonia burns in combustion chamber 8, and the flue gas that the ammonia burning produced recycles the flue gas heat in combustion chamber 8 before discharging into the atmosphere.
The device provided by the utility model is including setting up in the inside tube bundle cross flow heat exchanger 5 of combustion chamber 8. In the present invention, the tube bundle cross-flow heat exchanger 5 is used for catalytic cracking of ammonia gas, specifically, ammonia gas is thermally cracked into hydrogen-nitrogen-ammonia mixed gas under the action of a catalyst. In the present invention, the catalyst is preferably a southwestern institute Z204 nickel catalyst. The utility model discloses in, the hydrogen-nitrogen-ammonia mist that thermal cracking produced provides the combustion improver hydrogen of ammonia burning as the combustion improver of ammonia burning, realizes the continuous stable burning of ammonia to this process is not high to the purity requirement of hydrogen in the mist, and the partial ammonia that does not split still can continue to supply heat to the external world as the water in the fuel heating heat exchange coil pipe.
As an embodiment of the utility model, the tube bank parallel arrangement of tube bank formula cross flow heat exchanger 5 all is equipped with the catalyst in every pipe, and the ammonia flows unmixing in each pipe, and the flue gas in the outer combustion chamber 8 of tube bank flows vertically from bottom to top, and the fluid flow direction is mutually perpendicular inside and outside the tube bank.
As an embodiment of the utility model, 5 horizontal arrangements in the middle and upper portion of combustion chamber 8 inside of tube bank formula cross flow heat exchanger are 973 ~ 1073K the temperature of position.
As an embodiment of the utility model, the thermal cracking hydrogen production device for assisting ammonia combustion further comprises a branch ammonia conveying pipe 2-2, and the tube bundle type cross-flow heat exchanger 5 is connected with an ammonia source through the branch ammonia conveying pipe 2-2. As an embodiment of the utility model, still be provided with ammonia flowmeter 1 on branch road ammonia conveying pipe 2-2. The utility model discloses in, flowmeter 1 is as opening the controller that stops schizolysis hydrogen manufacturing process, adjusts the flow size of the ammonia that needs the schizolysis. In the present invention, the ammonia flow meter is preferably an indicating type, an electrical remote transmission type, a corrosion-resistant type, a high-pressure type, a jacket type, or an explosion-proof type ammonia flow meter. In the present invention, the ammonia gas flowing through the ammonia flowmeter is preferably at normal temperature.
As an embodiment of the utility model, still be provided with check valve 3 on the ammonia pipe 2-2 is failed to the branch road, check valve 3 set up in between ammonia flowmeter 1 and tube bundle cross flow heat exchanger 5 for the ammonia that control let in tube bundle cross flow heat exchanger 5.
As an embodiment of the utility model, still be provided with shell-and-tube type preheater 4 on branch road ammonia conveying pipe 2-2, shell-and-tube type preheater 4 set up in between check valve 3 and tube bundle cross flow heat exchanger 5. The utility model discloses in, shell-and-tube type preheater 4 is used for preheating the ammonia that gets into tube bundle formula cross flow heat exchanger 5, does benefit to and improves hydrogen manufacturing efficiency.
As an embodiment of the present invention, the shell-and-tube preheater 4 is disposed above the outside of the combustion chamber 8. In the utility model, ammonia gas enters the tube side of the shell-and-tube preheater 4, flue gas with waste heat in the combustion chamber 8 enters the shell side of the shell-and-tube preheater 4, and the heat of the flue gas is utilized to preheat the ammonia gas; the shell side inlet is connected with the smoke outlet, the temperature of smoke changes along with the combustion condition of fuel in the combustion chamber 8, and the temperature range is 373-473K. In the utility model, the tube layer inlet of the shell-and-tube flue gas preheater 4 is a low-temperature gaseous ammonia inlet, and the tube layer outlet is a high-temperature gaseous ammonia outlet; the shell pass inlet of the shell-and-tube flue gas preheater 4 is an inlet of high-temperature waste heat flue gas, and the shell pass outlet is an outlet of lower-temperature waste heat flue gas; the tube layer fluid and the shell layer fluid of the shell-and-tube preheater 4 are not intermixed. As an embodiment of the present invention, a baffle is provided in the shell of the shell-and-tube preheater 4 to improve the heat exchange of the shell side.
The device provided by the utility model is including setting up in the inside heat exchange coil of combustion chamber 8. The utility model discloses utilize the flue gas heat in the combustion chamber 8 to heat the water in the heat transfer coil, outside heat supply realizes thermal cyclic utilization.
As an embodiment of the present invention, the heat exchange coil includes a first heat exchange coil 7 and a second heat exchange coil 6, the first heat exchange coil 7 is disposed at a middle lower portion of the combustion chamber 8, and a temperature of the position is 1073-1873K; the second heat exchange coil 6 is arranged at the top of the combustion chamber 8, and the temperature of the second heat exchange coil is 473-973K.
As an embodiment of the present invention, the first heat exchanging coil 7 and the second heat exchanging coil 6 are respectively located in the foregoing below and above the tube bundle type cross flow heat exchanger 5, specifically: the tube bundle type cross flow heat exchanger 5 is arranged above the first heat exchange coil 7, and the second heat exchange coil 6 is arranged above the tube bundle type cross flow heat exchanger 5. The utility model discloses in, the flue gas that the ammonia burning produced is used for heating the water of first heat exchange coil 7 in combustion chamber 8 outside heat supply earlier before discharging into the atmosphere, then heats the ammonia among tube bundle cross flow heat exchanger 5, makes its schizolysis under the catalytic action, the outside heat supply of water among the reheating second heat exchange coil 6, and after discharge combustion chamber 8, the flue gas that has the waste heat is arranged in the ammonia of preheating in the shell-and-tube preheater 4.
The device provided by the utility model comprises an ammonia combustor 9 in the utility model, combustor 9 is used for igniting the ammonia to keep the sustained combustion of ammonia. In the utility model discloses in, ammonia combustor 9 with the air inlet of combustion chamber 8 is linked together, and the ammonia ignites through ammonia combustor 9, and under the hydrogen-nitrogen-ammonia mist combustion-supporting of 5 schizolysis productions of tube bundle cross flow heat exchanger, burns in combustion chamber 8.
In the present invention, the ammonia burner 9 is connected to the gas outlet of the tube bundle cross-flow heat exchanger 5. As an embodiment of the present invention, the gas outlet of the tube bundle cross-flow heat exchanger 5 is connected to the nozzle connection port 10 of the ammonia burner 9. As an embodiment of the present invention, the ammonia burner 9 further comprises an air inlet to provide a source of oxygen for ammonia combustion. The utility model discloses in, the hydrogen-nitrogen-ammonia mist that the tube bundle cross flow heat exchanger 5 produced gets into the shower nozzle connector 10 of ammonia combustor 9 as the combustion-supporting agent of ammonia burning, under the mating reaction of air, ignites the ammonia burning to keep the continuous stable burning of ammonia. As an embodiment of the present invention, the connecting pipe between the connecting ports 10 of the tube bundle type cross flow heat exchanger 5 and the burner 9 nozzle should be kept away from the flame as far as possible, and placed at the position between the first heat exchanging coil 7 and the peripheral wall of the combustion chamber 8 and close to the peripheral wall of the combustion chamber 8, so as to prevent high temperature damage.
As an embodiment of the utility model, the thermal cracking hydrogen production device with auxiliary ammonia combustion further comprises a main ammonia conveying pipe 2-1, and the air inlet of the ammonia combustor 9 is connected with an ammonia source through the main ammonia conveying pipe 2-1, so as to provide the ammonia source for ammonia combustion.
The device of the present invention is explained with reference to the schematic structural diagram shown in fig. 1: a part of ammonia gas enters an ammonia burner 9 through a main ammonia conveying pipe 2-1, is mixed with air, is ignited by the ammonia burner 9, is combusted in a combustion chamber 8, generates flue gas with higher temperature, is sequentially used for heating water in a first heat exchange coil 7 to supply heat to the outside, heating ammonia gas in a tube bundle type cross-flow heat exchanger 5 to ensure that the ammonia gas is cracked under the action of a catalyst, heating water in a second heat exchange coil 6 to supply heat to the outside, preheating ammonia gas in a shell-and-tube preheater 4, and finally is discharged; the other part of ammonia enters a shell-and-tube preheater 4 through a branch ammonia conveying pipe 2-2 to be preheated under the control of a flow meter 1, the preheated ammonia enters a tube bundle type cross flow heat exchanger 5 to be subjected to absorption and thermal cracking under the action of a catalyst, hydrogen-ammonia-nitrogen mixed gas generated by cracking converges at an air outlet of the tube bundle type cross flow heat exchanger 5 and enters a spray head connector 10 of an ammonia burner 9 to be mixed with the ammonia and air, continuous and stable combustion of the ammonia is realized, and flue gas heat generated by combustion is used for heating water in a heat exchange coil to supply heat to the outside and heating the tube bundle type cross flow heat exchanger 5 and the preheating shell-and-tube preheater 4.
The device provided by the utility model compact structure, heat exchange efficiency is high, utilizes the air current waste heat after ammonia burning supplies heat to the heat transfer coil pipe, for ammonia cracking process provides the heat in the tube bundle cross flow heat exchanger, and the hydrogen-nitrogen-ammonia gas mixture that ammonia produced after the thermal cracking can regard as the combustion improver of ammonia fuel, realizes the sustained stable combustion of ammonia.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A thermal cracking hydrogen production device for assisting ammonia combustion is characterized by comprising a combustion chamber (8), a tube bundle type cross-flow heat exchanger (5), a heat exchange coil and an ammonia combustor (9); the tube bundle type cross-flow heat exchanger (5) and the heat exchange coil are arranged inside the combustion chamber (8); the ammonia burner (9) is communicated with the air inlet of the combustion chamber (8); and the gas outlet of the tube bundle type cross-flow heat exchanger (5) is connected with an ammonia combustor (9).
2. The apparatus according to claim 1, further comprising a main ammonia transfer pipe (2-1) and a branch ammonia transfer pipe (2-2), wherein the ammonia burner (9) is connected to an ammonia source through the main ammonia transfer pipe (2-1); the tube bundle type cross-flow heat exchanger (5) is connected with an ammonia source through a branch ammonia conveying pipe (2-2).
3. The device according to claim 2, characterized in that an ammonia flow meter (1) is arranged on the branch ammonia pipe (2-2).
4. The device according to claim 3, characterized in that a one-way valve (3) is arranged on the branch ammonia conveying pipe (2-2), and the one-way valve (3) is arranged between the ammonia flow meter (1) and the tube bundle type cross-flow heat exchanger (5).
5. The device according to claim 4, characterized in that a shell-and-tube preheater (4) is arranged on the branch ammonia conveying pipe (2-2), and the shell-and-tube preheater (4) is arranged between the check valve (3) and the tube bundle type cross-flow heat exchanger (5).
6. An apparatus according to claim 5, characterized in that the shell-and-tube preheater (4) is arranged above and outside the combustion chamber (8).
7. The apparatus according to claim 1, characterized in that the heat exchange coil comprises a first heat exchange coil (7) and a second heat exchange coil (6), the first heat exchange coil (7) being arranged in the middle and lower part of the combustion chamber (8); the second heat exchange coil (6) is arranged at the top of the combustion chamber (8); the tube bundle type cross-flow heat exchanger (5) is arranged between the first heat exchange coil (7) and the second heat exchange coil (6).
8. The device according to claim 7, characterized in that the first heat exchange coil (7) is located at a temperature of 1073-1873K; the temperature of the position where the second heat exchange coil (6) is located is 473-973K, and the temperature of the position where the tube bundle type cross-flow heat exchanger (5) is located is 973-1073K.
9. The device according to claim 1 or 8, characterized in that the outlet of the tube bundle cross-flow heat exchanger (5) is connected to a nozzle connection (10) of an ammonia burner (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921733610.7U CN210656142U (en) | 2019-10-16 | 2019-10-16 | Thermal cracking hydrogen production device for assisting ammonia combustion |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921733610.7U CN210656142U (en) | 2019-10-16 | 2019-10-16 | Thermal cracking hydrogen production device for assisting ammonia combustion |
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| Publication Number | Publication Date |
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| CN210656142U true CN210656142U (en) | 2020-06-02 |
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| CN201921733610.7U Active CN210656142U (en) | 2019-10-16 | 2019-10-16 | Thermal cracking hydrogen production device for assisting ammonia combustion |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115090219A (en) * | 2022-07-31 | 2022-09-23 | 中国石油化工股份有限公司 | Hydrogen-ammonia mixed gas generating device and preparation method thereof |
| WO2024008270A1 (en) * | 2022-07-04 | 2024-01-11 | Wärtsilä Gas Solutions Norway AS | Method of cracking ammonia and a cracking arrangement for cracking ammondia |
-
2019
- 2019-10-16 CN CN201921733610.7U patent/CN210656142U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024008270A1 (en) * | 2022-07-04 | 2024-01-11 | Wärtsilä Gas Solutions Norway AS | Method of cracking ammonia and a cracking arrangement for cracking ammondia |
| CN115090219A (en) * | 2022-07-31 | 2022-09-23 | 中国石油化工股份有限公司 | Hydrogen-ammonia mixed gas generating device and preparation method thereof |
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