CN116495699A - Steam-water series isothermal conversion device for producing superheated steam - Google Patents
Steam-water series isothermal conversion device for producing superheated steam Download PDFInfo
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- CN116495699A CN116495699A CN202210373019.5A CN202210373019A CN116495699A CN 116495699 A CN116495699 A CN 116495699A CN 202210373019 A CN202210373019 A CN 202210373019A CN 116495699 A CN116495699 A CN 116495699A
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- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
- C01B3/06—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of inorganic compounds containing electro-positively bound hydrogen, e.g. water, acids, bases, ammonia, with inorganic reducing agents
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- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/02—Processes for making hydrogen or synthesis gas
- C01B2203/0283—Processes for making hydrogen or synthesis gas containing a CO-shift step, i.e. a water gas shift step
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/04—Integrated processes for the production of hydrogen or synthesis gas containing a purification step for the hydrogen or the synthesis gas
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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
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Abstract
The invention discloses a steam-water series isothermal conversion device for producing superheated steam, which belongs to the technical field of CO conversion and comprises an adiabatic conversion furnace, a first detoxification tank, a second detoxification tank, two isothermal conversion furnaces, a steam drum, a heat exchanger, related pipelines, valves and the like; the crude synthesis gas is connected with a first detoxification tank and a second detoxification tank through a heat exchanger, one way of an outlet of the detoxification tank is connected with an inlet of an adiabatic shift converter, the other way of the outlet of the detoxification tank is connected with an inlet of a second isothermal shift converter, the outlet of the shift gas is connected with a heat exchanger after converging, the outlet of the heat exchanger is connected with a third isothermal shift converter, the outlet of a heat exchange tube bundle of the second isothermal shift converter is connected with a steam drum, a circulating hot water outlet of the steam drum is connected with an inlet of the heat exchange tube bundle of the second isothermal shift converter, a steam outlet of the steam drum is connected with saturated steam to be heated from the outside after converging, and water is supplied to the steam drum through the boiler heated by the third isothermal shift converter. The invention obviously improves the grade of recovered waste heat and reduces the probability of instability of external pressure and leakage failure of the heat exchange tube of the isothermal shift converter.
Description
Technical Field
The invention relates to the technical field of CO conversion, in particular to a steam-water series isothermal conversion device for producing superheated steam.
Background
The conversion of crude synthesis gas generated by pressurized gasification of coal in industry at present mainly adopts adiabatic conversion and isothermal conversion processes. The adiabatic conversion process is to arrange one or more stages of adiabatic conversion furnaces, and arrange a steam superheater or a waste heat recoverer to byproduct saturated steam or heat other process mediums for recovering reaction waste heat after each stage of conversion furnace; the isothermal shift process is to set water pipe inside the shift reactor to absorb the residual heat and by-product saturated steam.
In general, the first isothermal shift furnace or the first adiabatic shift furnace has large reaction and heat load, the second isothermal shift furnace or the second adiabatic shift furnace has small reaction and heat load, the second isothermal shift furnace or the second adiabatic shift furnace has lower reaction bed temperature, and in order to meet the reaction condition of the second isothermal shift furnace, the heat exchange tube bundle generates lower steam pressure, and the waste heat recovery grade and value are also low. Meanwhile, the pressure in the heat exchange tubes in the heat exchange tube bundle is far smaller than the gas pressure outside the heat exchange tube bundle, and the heat exchange tubes in the heat exchange tube bundle are subjected to external pressure, so that leakage and instability damage are easy.
Disclosure of Invention
The invention aims to solve the technical problems of providing the steam-water series isothermal conversion device for producing superheated steam, which solves the technical problems existing in the prior art, realizes high grade and value of waste heat recovery, effectively ensures the balance of the internal pressure and the external pressure of a heat exchange tube bundle, and reduces the probability of instability of the external pressure and leakage failure of the heat exchange tube of an isothermal conversion furnace.
In order to solve the technical problems, the invention adopts the following technical scheme:
a steam-water series isothermal conversion device for producing superheated steam comprises a first conversion furnace, a first detoxification tank, a second isothermal conversion furnace, a steam drum, a third isothermal conversion furnace, a heat exchanger, related pipelines and valves; the first shift converter is an adiabatic shift converter;
the crude synthesis gas is connected with a gas inlet of a first detoxification tank and a gas inlet of a second detoxification tank respectively after passing through a heat exchanger, the first detoxification tank and a gas outlet of the second detoxification tank are combined and then are divided into two paths, one path is connected with the gas inlet of a first converter, the other path is connected with the gas inlet of a second isothermal converter, the gas outlet of the first converter is combined with the gas outlet of the second isothermal converter and then is connected with the heat exchanger, the outlet of the heat exchanger is connected with the gas inlet of a third isothermal converter, and the gas outlet at the bottom of the third isothermal converter is connected with a heat recovery system;
the outlet of the second heat exchange tube bundle of the second isothermal shift furnace is connected with the steam drum steam-liquid mixture inlet, the circulating hot water outlet of the steam drum is connected with the inlet of the second heat exchange tube bundle of the second isothermal shift furnace, the steam drum steam outlet is connected with the steam inlet of the first shift furnace after being converged with saturated steam to be heated, and the steam outlet of the first shift furnace is connected with a superheated steam pipe network;
one path of boiler water supplementing is converged with one path of outlet of the third heat exchange tube bundle at the top of the third isothermal shift furnace and then connected with a water inlet of a steam drum, the other path of boiler water supplementing is converged with the other path of outlet of the third heat exchange tube bundle at the top of the third isothermal shift furnace and then connected with the inlet of the third heat exchange tube bundle at the bottom of the third isothermal shift furnace, and a gas outlet at the bottom of the third isothermal shift furnace is connected with a heat recovery system.
The technical scheme of the invention is further improved as follows: the heat-insulating conversion furnace adopts a first heat-insulating conversion furnace with a steam superheater arranged therein or adopts a second heat-insulating conversion furnace with an upper steam superheater and a lower steam superheater arranged between a plurality of heat-insulating sections; when a second adiabatic shift furnace is employed, the apparatus further includes a water heater; the steam outlet of the steam drum is connected with saturated steam to be heated from the outside, and then is connected with the superheated steam inlet of the upper-stage steam superheater through the lower-stage steam superheater, and the superheated steam outlet of the upper-stage steam superheater is connected with a superheated steam pipe network; one path of water supplementing of the boiler is converged with one path of outlet of a third heat exchange tube bundle at the top of the third isothermal shift furnace and then is respectively connected with a water inlet of the steam drum and a heat exchange inlet of the water heater, and a hot water outlet of the water heater is connected with the water inlet of the steam drum.
The technical scheme of the invention is further improved as follows: and the inlet and the outlet of the first detoxification tank and the second detoxification tank are respectively provided with a shut-off valve for overhauling the detoxification tank and replacing the detoxification agent.
The technical scheme of the invention is further improved as follows: the air inlet of the first conversion furnace and the air inlet of the second isothermal conversion furnace are both provided with regulating valves for regulating the air quantity of the air inlet.
The technical scheme of the invention is further improved as follows: the flow regulating valve is arranged on the steam drum water inlet pipeline.
By adopting the technical scheme, the invention has the following technical progress:
1. the invention is characterized in that the reaction heat of a first shift converter with a steam superheater arranged between heat insulation sections of a plurality of sections is utilized to produce superheated steam through the steam superheater arranged between catalyst bed sections of each section in the converter, a second isothermal shift converter connected with the first shift converter in parallel is utilized to recover saturated steam through a second heat exchange tube bundle arranged on the catalyst bed in the converter, the shift gas is cooled by a heat exchanger and then enters a gas inlet of a third isothermal shift converter to continue shift reaction, the third isothermal shift converter is utilized to preheat boiler feed water, the pressure of the hot water is equivalent to the pressure of steam generated by the second isothermal shift converter, the hot water is utilized as water supplement of a steam drum, and the third isothermal shift converter heats the boiler feed water to replace low-pressure steam so as to increase the steam quantity of the byproducts of the second isothermal shift converter, thus obviously improving the grade of byproduct waste heat of the third isothermal shift converter system.
2. The invention can control the tube plate steam side pressure of the steam superheater and the tube bundle water side pressure of the isothermal shift furnace to be slightly larger than the synthesis gas side pressure by adjusting the steam pressure of the steam drum, and simultaneously the steam superheater and the isothermal shift furnace heat exchange tube bundle bear the internal pressure, and can realize the micro pressure difference operation between the tube bundle water side and the process gas side, obviously improve the stress condition and reduce the probability of instability and leakage failure of the external pressure of the isothermal shift furnace heat exchange tube.
3. The detoxication tank is arranged behind the heat exchanger, so that SOx, entrained dust and other impurities in the crude synthesis gas can be removed, the catalyst can be protected from being damaged by poison, and the service life of the catalyst can be prolonged.
4. The first shift converter is arranged as an adiabatic shift converter, so that not only can the saturated steam provided by the steam drum in the system be overheated, but also the saturated steam provided by the outside of the system can be overheated.
5. The first and second isothermal shift converters are connected in parallel and simultaneously connected in series with the third isothermal shift converter, and the third isothermal shift converter can not only provide supplementary hot water equivalent to steam pressure for the steam drum, but also provide heat for reaction gas at the inlet of the third isothermal shift converter, so that the normal operation of the third isothermal shift converter is effectively maintained, and the third isothermal shift converter can be used for a shift section, a low-pressure methanol synthesis section and an ammonia synthesis section.
Drawings
FIG. 1 is a schematic structural view of embodiment 1 of the present invention;
FIG. 2 is a schematic structural view of embodiment 2 of the present invention;
wherein, 1, a first heat insulation shift converter, 1a, a steam superheater, 2, a first detoxification tank, 3, a second detoxification tank, 4, a second isothermal shift converter 4,5, a steam drum, 6, a third isothermal shift converter, 7, a heat exchanger, 8, a first pipeline, 9 and a second pipeline, 10, a third pipeline, 11, a fourth pipeline, 11a, a boiler water supplementing pipeline, 12, a water heater, 13, a fifth pipeline, 14, a sixth pipeline, 15, a third flow regulating valve, 16, a second adiabatic shift furnace, 16a, an upper-stage steam superheater, 16b and a lower-stage steam superheater.
Detailed Description
The invention is described in further detail below with reference to the attached drawings and examples:
it should be noted that, in the description of the present invention, the terms "upper," "lower," "front," "rear," "left," "right," "longitudinal," "transverse," "inner," "outer," and the like refer to directions or positional relationships based on the directions or positional relationships shown in the drawings, and are merely for convenience of description and understanding of the technical solution of the present invention, the present invention is not limited to the above description, and the present invention is not limited to the above description, but is also limited to the examples, and changes, modifications, additions or substitutions made by those skilled in the art within the spirit and scope of the present invention should be considered as the scope of the present invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a number" means at least two, for example, two, three, etc., unless explicitly specified otherwise.
Example 1
As shown in fig. 1, the steam-water series isothermal conversion device for producing superheated steam comprises a first adiabatic conversion furnace 1, a first detoxification tank 2, a second detoxification tank 3, a second isothermal conversion furnace 4, a steam drum 5, a third isothermal conversion furnace 6, a heat exchanger 7, and related pipelines and valves; a steam superheater 1a is arranged in the first adiabatic shift converter 1;
the crude synthesis gas is preheated by a heat exchanger 7 and then respectively enters a first detoxification tank 2 and a second detoxification tank 3, and SO is removed in the first detoxification tank 2 and the second detoxification tank 3 x And the dust and other impurities are merged and then divided into two paths, wherein one path enters the gas inlet of the first adiabatic shift converter 1, and the other path enters the gas inlet of the second isothermal shift converter 4. When the first detoxification tank 2 is in a stopped state, part of gas at the outlet of the second detoxification tank 3 enters the first adiabatic shift converter 1, and the other part enters the second isothermal shift converter 4; when the second detoxification tank 3 is in a stopped state, a part of the gas at the outlet of the first detoxification tank 2 enters the first adiabatic shift furnace 1, and a part enters the second isothermal shift furnace 4. And the air inlets and the air outlets of the first detoxification tank 2 and the second detoxification tank 3 are respectively provided with a cut-off valve for overhauling the detoxification tanks and replacing the detoxification agents. The shut-off valve arranged at the outlet of the first detoxification tank 2 can adjust the air inflow entering the first adiabatic shift converter 1 according to the amount of saturated steam to be overheated, so as to ensure reasonable heat distribution of the first adiabatic shift converter 1 and the whole system.
The air inlets of the first adiabatic conversion furnace 1 and the second isothermal conversion furnace 4 are respectively provided with a regulating valve for regulating the air inlet amounts of the first adiabatic conversion furnace 1 and the second isothermal conversion furnace 4, the conversion air outlet of the first adiabatic conversion furnace 1 is combined with the conversion air outlet of the second isothermal conversion furnace 4, the temperature of the conversion air is reduced by the heat exchanger 7 and then enters the air inlet of the third isothermal conversion furnace 6, and the converted air after reaction is discharged out of the air outlet at the bottom of the third isothermal conversion furnace 6 and then is subjected to heat removal and recovery.
The outlet of a second heat exchange tube bundle of the second isothermal shift furnace 4 is connected with the steam-liquid mixture inlet of a steam drum 5, the circulating hot water outlet of the steam drum 5 is connected with the inlet of the second heat exchange tube bundle of the second isothermal shift furnace 4, the steam outlet of the steam drum 5 is connected with the steam inlet of a steam superheater 1a arranged in the first adiabatic shift furnace 1 after being converged with an external saturated steam inlet to be heated, the superheated steam outlet of the steam superheater 1a is connected with the top outlet of the first adiabatic shift furnace 1, one path of boiler water supplementing is connected with the water inlet of the steam drum 5 after being converged with the outlet of a third heat exchange tube bundle at the top of the third isothermal shift furnace 6 through a first pipeline 8 and a second pipeline 9, the other path of boiler water supplementing is connected with the third heat exchange tube bundle at the top of the third isothermal shift furnace 6 after being converged with a third pipeline 10 through a third pipeline 10, and the bottom gas outlet of the third isothermal shift furnace 6 is connected with a heat recovery system.
According to the load condition of the third isothermal shift furnace 6, a first flow regulating valve is arranged on the first pipeline 8, and the water flow of the first pipeline 8 is regulated to control the water inlet temperature of the inlet of the third heat exchange tube bundle of the third isothermal shift furnace 6 so as to meet the heat balance and normal operation of the third isothermal shift furnace 6. A second flow rate adjusting valve is provided on the boiler water supplementing line 11a for controlling the liquid level of the drum 5. The first adiabatic shift converter 1 is an adiabatic shift converter in which a steam superheater 1a is provided, and the second isothermal shift converter 4 and the third isothermal shift converter 6 are isothermal shift converters. The tube plate steam side pressure of the steam superheater 1a and the water side pressure of the second heat exchange tube bundle of the second isothermal shift furnace 4 and the third heat exchange tube bundle of the third isothermal shift furnace 6 can be controlled by adjusting the steam pressure of the steam drum 5.
Example 2
As shown in fig. 2, the steam-water series isothermal conversion device for producing superheated steam comprises a second adiabatic conversion furnace 16, a first detoxification tank 2, a second detoxification tank 3, a second isothermal conversion furnace 4, a steam drum 5, a third isothermal conversion furnace 6, a heat exchanger 7, a water heater 12 and related pipelines and valves; the second adiabatic shift converter 16 is provided with an upper-stage steam superheater 16a and a lower-stage steam superheater 16b between the multiple adiabatic stages;
the crude synthesis gas is preheated by a heat exchanger 7 and then is respectively put into a first detoxification tank 2 and a second detoxification tank 3, and is detoxified in the two detoxification tanksSO removal x The mixed gas is divided into two paths after the mixed gas and the entrained dust and other impurities are converged, one path enters a gas inlet of the second adiabatic shift converter 16, the other path enters a gas inlet of the second isothermal shift converter 4, and when the first detoxification tank 2 is in a stop state, a part of gas at an outlet of the second detoxification tank 3 enters the second adiabatic shift converter 16, and the other part enters the second isothermal shift converter 4; when the second detoxification tank 3 is in a stopped state, a part of the gas at the outlet of the first detoxification tank 2 enters the first adiabatic shift furnace 16, and a part enters the second isothermal shift furnace 4. And the air inlets and the air outlets of the first detoxification tank 2 and the second detoxification tank 3 are respectively provided with a cut-off valve for overhauling the two detoxification tanks and replacing the detoxification agents. The shut-off valve arranged at the outlet of the first detoxification tank 2 can adjust the air inflow into the second adiabatic shift converter 16 according to the amount of saturated steam to be overheated, so as to ensure reasonable heat distribution of the second adiabatic shift converter 16 and the whole system.
The air inlets of the second adiabatic shift converter 16 and the second isothermal shift converter 4 are respectively provided with a regulating valve for regulating the air inlet amount of the air entering the second adiabatic shift converter 16 and the second isothermal shift converter 4. The converted gas after the upper reaction of the second adiabatic conversion furnace 16 is cooled by the upper steam superheater 16a and then enters the lower catalyst, the reacted gas is cooled by the lower steam superheater 16b and then exchanges heat with saturated steam from outside the boundary and steam in the steam drum 5, then the gas is discharged from the bottom gas outlet of the second adiabatic conversion furnace 16, the second isothermal conversion furnace 4 carries out conversion reaction, meanwhile saturated steam is byproducts, the converted gas at the bottom outlet of the second adiabatic conversion furnace 16 and the converted gas at the bottom outlet of the second isothermal conversion furnace 4 are converged and then enter the heat exchanger 7, the converted gas cooled by the heat exchanger 7 is further subjected to heat exchange and temperature rise by the water heater 12 and then is connected with the gas inlet of the third isothermal conversion furnace 6, the converted gas discharged from the bottom gas outlet of the third isothermal conversion furnace 6 enters the heat recovery system.
The outlet of the second heat exchange tube bundle of the second isothermal shift furnace 4 is connected with the steam-liquid mixture inlet of the steam drum 5, the circulating hot water outlet of the steam drum 5 is connected with the inlet of the second heat exchange tube bundle of the second isothermal shift furnace 4, the steam outlet of the steam drum 5 is converged with saturated steam to be heated from outside and then sequentially passes through a lower-stage steam superheater 16b and an upper-stage steam superheater 16a which are arranged in the lower stage of the second adiabatic shift furnace 16, namely, the superheated steam outlet of the lower-stage steam superheater 16b of the second adiabatic shift furnace 16 is connected with the steam inlet of the upper-stage steam superheater 16a of the adiabatic shift furnace 16 through a pipeline, and the superheated steam of the superheated steam outlet of the superheated steam of the upper-stage steam superheater 16a of the second adiabatic shift furnace 16 is connected with a superheated steam pipe network.
One path of boiler water supplementing is converged with one path of outlet of a third heat exchange tube bundle at the top of the third isothermal shift furnace 6 through a first pipeline 8 and then is connected with a water inlet of a steam drum 5 and a hot water inlet of a sixth pipeline 14 into a water heater 12 through a fifth pipeline 13 respectively, the hot water outlet of the water heater 12 is connected with the water inlet of the steam drum 5, the other path of boiler water supplementing is converged with the other path of outlet of the third heat exchange tube bundle at the top of the third isothermal shift furnace 6 through a fourth pipeline 11 and then is connected with the inlet of a third heat exchange tube bundle at the bottom of the third isothermal shift furnace 6 through a third pipeline 10, a first flow regulating valve is arranged on the first pipeline 8 according to the load condition of the third isothermal shift furnace 6, the heat balance and normal operation of the third isothermal shift furnace 6 are met by regulating the water flow of the first pipeline 8, and the bottom of the third isothermal shift furnace 6 is connected with a heat recovery system through a shift gas outlet.
A third flow regulating valve 15 is arranged on the fifth pipeline 13 of the water inlet of the steam drum 5 and is used for controlling the temperature of the gas inlet of the third isothermal shift furnace 6 to maintain the normal operation of the third isothermal shift furnace 6. A second flow rate regulating valve is provided in the boiler water supply line 11a for controlling the liquid level of the drum 5.
The second adiabatic shift furnace 16 is provided with a steam superheater under each bed layer, namely an upper steam superheater 16a and a lower steam superheater 16b, and constitutes an adiabatic shift furnace of two or more steam superheaters arranged between two or more adiabatic sections.
In summary, the first and second isothermal shift converters are connected in parallel and simultaneously connected in series with the third isothermal shift converter, and the third isothermal shift converter can not only provide supplementary hot water equivalent to steam pressure for the steam drum, but also provide heat for reaction gas at the inlet of the third isothermal shift converter, so that the normal operation of the third isothermal shift converter is effectively maintained.
Claims (5)
1. A steam-water series isothermal conversion device for producing superheated steam is characterized in that: the device comprises a first shift converter, a first detoxification tank (2), a second detoxification tank (3), a second isothermal shift converter (4), a steam drum (5), a third isothermal shift converter (6), a heat exchanger (7) and related pipelines and valves; the first shift converter is an adiabatic shift converter;
the crude synthesis gas is connected with gas inlets of a first detoxification tank (2) and a second detoxification tank (3) respectively after passing through a heat exchanger (7), the gas inlets of the first detoxification tank (2) and the gas inlets of the second detoxification tank (3) are combined and then divided into two paths, one path is connected with the gas inlet of a first transformation furnace, the other path is connected with the gas inlet of a second isothermal transformation furnace (4), the transformed gas outlet of the first transformation furnace is connected with the transformed gas outlet of the second isothermal transformation furnace (4) and then is connected with the heat exchanger (7), the outlet of the heat exchanger (7) is connected with the gas inlet of a third isothermal transformation furnace (6), and the gas outlet at the bottom of the third isothermal transformation furnace (6) is connected with a heat recovery system;
the outlet of a second heat exchange tube bundle of the second isothermal shift furnace (4) is connected with the steam-liquid mixture inlet of a steam drum (5), the circulating hot water outlet of the steam drum (5) is connected with the inlet of the second heat exchange tube bundle of the second isothermal shift furnace (4), the steam outlet of the steam drum (5) is connected with the steam inlet of the first shift furnace after being converged with saturated steam to be heated, and the steam outlet of the first shift furnace is connected with a superheated steam pipe network;
one path of boiler water supplementing is connected with one path of outlet of a third heat exchange tube bundle at the top of the third isothermal conversion furnace (6) and then connected with a water inlet of a steam drum (5), the other path of boiler water supplementing is connected with the other path of outlet of the third heat exchange tube bundle at the top of the third isothermal conversion furnace (6) and then connected with the inlet of the third heat exchange tube bundle at the bottom of the third isothermal conversion furnace (6), and a gas outlet at the bottom of the third isothermal conversion furnace (6) is connected with a heat recovery system.
2. The steam-water series isothermal conversion device for producing superheated steam according to claim 1, wherein: the heat-insulating conversion furnace adopts a first heat-insulating conversion furnace (1) internally provided with a steam superheater (1 a) or adopts a second heat-insulating conversion furnace (16) provided with an upper-stage steam superheater (16 a) and a lower-stage steam superheater (16 b) between a plurality of heat-insulating sections; when a second adiabatic shift furnace (16) is employed, the apparatus further includes a water heater (12); the steam outlet of the steam drum (5) is connected with saturated steam to be heated from the outside, and then connected with the superheated steam inlet of the upper-stage steam superheater (16 a) through the lower-stage steam superheater (16 b), and the superheated steam outlet of the upper-stage steam superheater (16 a) is connected with a superheated steam pipe network; one water supplementing path of the boiler is connected with one outlet of a third heat exchange tube bundle at the top of the third isothermal shift furnace (6) and then is respectively connected with a water inlet of the steam drum (5) and a heat exchange inlet of the water heater (12), and a hot water outlet of the water heater (12) is connected with a water inlet of the steam drum (5).
3. A steam-water series isothermal conversion device for producing superheated steam according to any of claims 1-2, wherein: and the inlet and the outlet of the first detoxification tank (2) and the second detoxification tank (3) are respectively provided with a shut-off valve for overhauling the detoxification tank and replacing the detoxification agent.
4. A steam-water series isothermal conversion device for producing superheated steam according to any of claims 1-2, wherein: the air inlet of the first conversion furnace and the air inlet of the second isothermal conversion furnace (4) are both provided with regulating valves for regulating the air inlet amount of the air.
5. A steam-water series isothermal conversion device for producing superheated steam according to any of claims 1-2, wherein: the water inlet pipeline of the steam drum (5) is provided with a flow regulating valve.
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| CN202110577542.5A CN113233417A (en) | 2021-05-26 | 2021-05-26 | Steam-water series isothermal conversion device for producing superheated steam |
| CN2021105775425 | 2021-05-26 |
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| CN116495699A true CN116495699A (en) | 2023-07-28 |
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| CN202110577542.5A Withdrawn CN113233417A (en) | 2021-05-26 | 2021-05-26 | Steam-water series isothermal conversion device for producing superheated steam |
| CN202220820276.4U Active CN220131894U (en) | 2021-05-26 | 2022-04-11 | Steam-water series isothermal conversion device for producing superheated steam |
| CN202210373019.5A Pending CN116495699A (en) | 2021-05-26 | 2022-04-11 | Steam-water series isothermal conversion device for producing superheated steam |
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| CN202220820276.4U Active CN220131894U (en) | 2021-05-26 | 2022-04-11 | Steam-water series isothermal conversion device for producing superheated steam |
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|---|---|---|---|---|
| CN114394573B (en) * | 2022-02-24 | 2023-12-01 | 河北正元化工工程设计有限公司 | Series-connection CO conversion device |
-
2021
- 2021-05-26 CN CN202110577542.5A patent/CN113233417A/en not_active Withdrawn
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2022
- 2022-04-11 CN CN202220820276.4U patent/CN220131894U/en active Active
- 2022-04-11 CN CN202210373019.5A patent/CN116495699A/en active Pending
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| Publication number | Publication date |
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| CN113233417A (en) | 2021-08-10 |
| CN220131894U (en) | 2023-12-05 |
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