CN215327830U - System for utilize boiler to contain sulfur flue gas system methyl alcohol - Google Patents
System for utilize boiler to contain sulfur flue gas system methyl alcohol Download PDFInfo
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- CN215327830U CN215327830U CN202120563668.2U CN202120563668U CN215327830U CN 215327830 U CN215327830 U CN 215327830U CN 202120563668 U CN202120563668 U CN 202120563668U CN 215327830 U CN215327830 U CN 215327830U
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- 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
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Abstract
The utility model relates to a system for preparing methanol by utilizing sulfur-containing flue gas of a boiler, which comprises a Bunsen reactor, a sulfuric acid collecting device, a hydrogen iodide separating device and the like; the boiler flue is a flue after boiler denitration and dust removal, an outlet of the boiler flue is connected to a first inlet of the Bunsen reactor, an outlet of the water supply device is connected to a second inlet of the Bunsen reactor, a first outlet of the Bunsen reactor is connected to an inlet of the sulfuric acid collecting device, a second outlet of the Bunsen reactor is connected to an inlet of the hydrogen iodide separating device, a third outlet of the Bunsen reactor is connected to an inlet of the reactor exhaust gas collecting device, a first outlet of the hydrogen iodide separating device is connected to an inlet of the hydrogen collecting device, a second outlet of the hydrogen iodide separating device is connected to a fourth inlet of the Bunsen reactor, a third outlet of the hydrogen iodide separating device is connected to an inlet of the iodine recovering device, and an outlet of the iodine recovering device is connected to a third inlet of the Bunsen reactor. The utility model does not need to obtain sulfur dioxide by pyrolyzing sulfuric acid at high temperature, thereby solving the difficulty of hydrogen production by pyrolysis at high temperature.
Description
Technical Field
The utility model belongs to the technical field of energy chemical industry, and particularly relates to a system for preparing methanol by using sulfur-containing flue gas of a boiler.
Background
The main components of the general boiler flue gas are nitrogen, carbon dioxide, sulfur dioxide and water vapor. The volume ratio of the flue gas of a certain 1000MW boiler is as follows: 73.28% of nitrogen, 12.67% of carbon dioxide, 8.37% of water vapor, 5.4% of oxygen and 0.1% of sulfur dioxide. Sulfur dioxide in boiler flue gas is one of the main pollution sources of the atmosphere, and carbon dioxide is a main greenhouse gas. The reduced emissions of these two gases are a major problem facing power production.
The hydrogen production by adopting the sulfur-iodine cycle high-temperature hydrolysis needs the high temperature above 850 ℃, the sulfuric acid is pyrolyzed into sulfur dioxide, the water, the sulfur dioxide and the iodine generate hydrogen iodide at the normal temperature, and the hydrogen iodide is decomposed into iodine and hydrogen at the temperature above 300 ℃. The difficulty of the process is that:
(1) the high temperature of 850 ℃ required for pyrolyzing the sulfuric acid is difficult to meet;
(2) sulfuric acid is a very corrosive substance, and a material capable of resisting high-temperature corrosion is expensive;
(3) the hydrogen production by pyrolysis of sulfuric acid is less economical.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a system for preparing methanol by using boiler sulfur-containing flue gas, aiming at solving the problems of hydrogen preparation by high-temperature hydrolysis and sulfur-containing coal combustion at present.
The utility model is realized by adopting the following technical scheme:
a system for preparing methanol by utilizing sulfur-containing flue gas of a boiler comprises a boiler flue, a water supply device, a Bunsen reactor, a sulfuric acid collecting device, a hydrogen iodide separating device, a reactor exhaust collecting device, an iodine recovery device and a hydrogen collecting device; wherein the content of the first and second substances,
the boiler flue is a flue after boiler denitration and dust removal, an outlet of the boiler flue is connected to a first inlet of the Bunsen reactor, an outlet of the water supply device is connected to a second inlet of the Bunsen reactor, a first outlet of the Bunsen reactor is connected to an inlet of the sulfuric acid collecting device, a second outlet of the Bunsen reactor is connected to an inlet of the hydrogen iodide separating device, a third outlet of the Bunsen reactor is connected to an inlet of the reactor exhaust gas collecting device, a first outlet of the hydrogen iodide separating device is connected to an inlet of the hydrogen collecting device, a second outlet of the hydrogen iodide separating device is connected to a fourth inlet of the Bunsen reactor, a third outlet of the hydrogen iodide separating device is connected to an inlet of the iodine recovering device, and an outlet of the iodine recovering device is connected to a third inlet of the Bunsen reactor.
A further improvement of the utility model consists in that the Bunsen reactor is equipped with heating and cooling means capable of adjusting its internal temperature between 0 ℃ and 130 ℃; the inside of the device is pre-filled with a solution formed by sulfur dioxide, iodine and water according to a certain proportion, the sulfur dioxide, the iodine and the water partially react to generate sulfuric acid and hydrogen iodide, the sulfuric acid enters a sulfuric acid collecting device, and the hydrogen iodide enters a hydrogen iodide separating device.
The utility model is further improved in that the hydrogen iodide separation device is internally provided with a heating and cooling device, and the temperature of the medium in the hydrogen iodide separation device can be adjusted to be between 250 ℃ and 600 ℃ through the operation of the heating and cooling device.
The further improvement of the utility model is that the hydrogen iodide separation device is internally provided with a catalyst, hydrogen iodide is partially decomposed into hydrogen and iodine in the device, the hydrogen enters the hydrogen collection device, the iodine enters the iodine recovery device, and the hydrogen iodide which is not decomposed returns to the Bunsen reactor.
The utility model has the further improvement that the device also comprises an oxygen removing device, a methanol preparation device and a methanol storage device; wherein the content of the first and second substances,
the outlet of the reactor exhaust gas collecting device is connected with the first inlet of the deoxidizing device, the outlet of the deoxidizing device is connected with the first inlet of the methanol preparation device, the outlet of the methanol preparation device is connected with the inlet of the methanol storage device, the first outlet of the hydrogen gas collecting device is connected with the second inlet of the deoxidizing device, and the second outlet of the hydrogen gas collecting device is connected with the second inlet of the methanol preparation device.
In a further development of the utility model, the oxygen removal device is provided with a burner, oxygen contained in the gas discharged from the reactor exhaust gas collection device is combusted with hydrogen discharged from the hydrogen collection device to consume oxygen contained in the gas discharged from the reactor exhaust gas collection device, and the heat generated by the combustion heats the gas discharged from the reactor exhaust gas collection device.
The utility model is further improved in that the methanol preparation device is internally provided with a heating and cooling device, and the temperature of the medium in the methanol preparation device can be adjusted to be between 250 ℃ and 600 ℃ through the operation of the heating and cooling device.
The utility model is further improved in that a compressor is arranged in the methanol preparation device, and the pressure of a medium entering the methanol preparation device can be increased to 10MPa through the work of the compressor.
The utility model is further improved in that a catalyst is arranged in the methanol preparation device, and carbon dioxide and hydrogen entering the methanol preparation device generate methanol under the action of the catalyst under preset pressure and temperature.
The utility model has at least the following beneficial technical effects:
the system for preparing the methanol by using the sulfur-containing flue gas of the boiler provided by the utility model has the following obvious advantages in several aspects:
(1) the utility model provides a method for absorbing and utilizing the sulfur dioxide in the waste gas of the flue gas, and the sulfur dioxide is obtained without pyrolyzing the sulfuric acid at high temperature, thereby solving the difficulty of preparing hydrogen by pyrolyzing at high temperature;
(2) the energy consumption of the sulfur-iodine circular hydrogen production is mainly in the sulfuric acid decomposition link, the process provided by the utility model spans the sulfuric acid decomposition link with the highest energy consumption, and the energy required by hydrogen production is much smaller than that of the traditional sulfur-iodine hydrogen production. The boiler flue gas emission temperature is suitable for the hydrogen iodide generation temperature, no extra measures are needed, and the temperature required by hydrogen iodide decomposition is easily obtained in a power plant (heating by steam).
(3) Raw materials required by hydrogen production are derived from polluted waste gas discharged by a boiler, so that the hydrogen production cost is low;
(4) the added value is generated by the comprehensive utilization of the byproduct sulfuric acid generated by hydrogen production;
(5) reduces the emission of carbon dioxide, and is beneficial to the emission reduction of greenhouse gas
(6) The sulfur dioxide in the flue gas is recycled, which is beneficial to environmental protection;
(7) the carbon dioxide in the flue gas is recycled, and the economic value is high.
Drawings
FIG. 1 is a block diagram of a system for producing methanol from sulfur-containing flue gas of a boiler according to the present invention.
Description of reference numerals:
1. boiler flue, 2, water supply device, 3, Bunsen reactor, 4, sulfuric acid collecting device, 5, hydrogen iodide separating device, 6, reactor exhaust collecting device, 7, deaerating plant, 8, iodine recovering device, 9, hydrogen collecting device, 10, methanol preparation device, 11, methanol storage device
Detailed Description
The utility model is described in further detail below with reference to the figures and examples.
As shown in fig. 1, the system for preparing methanol by using sulfur-containing flue gas of a boiler provided by the utility model comprises a boiler flue 1, a water supply device 2, a Bunsen reactor 3, a sulfuric acid collection device 4, a hydrogen iodide separation device 5, a reactor exhaust gas collection device 6, an oxygen removal device 7, an iodine recovery device 8, a hydrogen collection device 9, a methanol preparation device 10 and a methanol storage device 11.
The boiler flue 1 is a flue after boiler denitration and dust removal, an outlet of the boiler flue is connected to a first inlet of the Bunsen reactor 3, an outlet of the water supply device 2 is connected to a second inlet of the Bunsen reactor 3, a first outlet of the Bunsen reactor 3 is connected to an inlet of the sulfuric acid collecting device 4, a second outlet of the Bunsen reactor 3 is connected to an inlet of the hydrogen iodide separating device 5, a third outlet of the Bunsen reactor 3 is connected to an inlet of the reactor exhaust gas collecting device 6, a first outlet of the hydrogen iodide separating device 5 is connected to an inlet of the hydrogen collecting device 9, a second outlet of the hydrogen iodide separating device 5 is connected to a fourth inlet of the Bunsen reactor 3, a third outlet of the hydrogen iodide separating device 5 is connected to an inlet of the iodine recovering device 8, and an outlet of the iodine recovering device 8 is connected to a third inlet of the Bunsen reactor 3. The outlet of the reactor exhaust gas collecting device 6 is connected with the first inlet of the oxygen removing device 7, the outlet of the oxygen removing device 7 is connected with the first inlet of the methanol preparation device 10, the outlet of the methanol preparation device 10 is connected with the inlet of the methanol storage device 11, the first outlet of the hydrogen collecting device 9 is connected with the second inlet of the oxygen removing device 7, and the second outlet of the hydrogen collecting device 9 is connected with the second inlet of the methanol preparation device 10.
Wherein the Bunsen reactor 3 is equipped with heating and cooling means capable of adjusting the internal temperature thereof between 0 ℃ and 130 ℃; the inside of the device is pre-filled with a solution formed by sulfur dioxide, iodine and water according to a certain proportion, the sulfur dioxide, the iodine and the water partially react to generate sulfuric acid and hydrogen iodide, the sulfuric acid enters a sulfuric acid collecting device 4, and the hydrogen iodide enters a hydrogen iodide separating device 5.
The hydrogen iodide separation device 5 is internally provided with a heating and cooling device, and the temperature of the medium in the hydrogen iodide separation device 5 can be adjusted to be between 250 ℃ and 600 ℃ by the operation of the heating and cooling device. The hydrogen iodide separation device 5 is internally provided with a catalyst, hydrogen is partially decomposed into hydrogen and iodine in the device, the hydrogen enters the hydrogen collection device 9, the iodine enters the iodine recovery device 8, and the hydrogen iodide which is not decomposed returns to the Bunsen reactor 3.
The oxygen removing device 7 is equipped with a burner, oxygen contained in the gas discharged from the reactor exhaust gas collecting device 6 is burned with hydrogen discharged from the hydrogen collecting device 9 to consume oxygen contained in the gas discharged from the reactor exhaust gas collecting device 6, and the gas discharged from the reactor exhaust gas collecting device 6 is heated by heat generated by the combustion.
The methanol preparation apparatus 10 is provided with a heating and cooling apparatus therein, and the temperature of the medium in the methanol preparation apparatus 10 can be adjusted to be between 250 ℃ and 600 ℃ by the operation of the heating and cooling apparatus. The methanol preparation device 10 is internally provided with a compressor, and the pressure of a medium entering the methanol preparation device 10 can be increased to 10MPa through the work of the compressor. The methanol preparation apparatus 10 is filled with a catalyst, and carbon dioxide and hydrogen gas introduced into the methanol preparation apparatus 10 are subjected to a catalyst under a predetermined pressure and temperature to generate methanol.
The utility model provides a system for preparing methanol by using sulfur-containing flue gas of a boiler, which comprises the following components in working:
adding a preset amount of water into a Bunsen reactor 3 by a water supply device 2;
proportionally charging a preset amount of iodine into the Bunsen reactor 3 in advance;
the method comprises the following steps of introducing the flue gas which is subjected to denitration and dust removal and is from a boiler flue 1 into a Bunsen reactor 3, wherein the flue gas comprises the following main components: nitrogen, carbon dioxide, oxygen, sulfur dioxide;
sulfur dioxide, water and iodine are subjected to chemical reaction in the middle of the Bunsen reactor 3 to generate hydrogen iodide and sulfuric acid, the sulfuric acid enters a sulfuric acid collecting device 4, and the hydrogen iodide enters a hydrogen iodide separator 5;
hydrogen iodide entering a hydrogen iodide separator 5 is partially decomposed into hydrogen and iodine at the temperature of over 300 ℃ under the action of a catalyst, the iodine enters an iodine recovery device 8, the hydrogen enters a hydrogen collecting device 9, and the undecomposed hydrogen iodide returns to the Bunsen reactor 3 to participate in the next round of reaction;
the gas discharged from the Bunsen reactor 3 enters a reactor exhaust collecting device 6, and the main components of the gas comprise nitrogen, carbon dioxide and oxygen;
oxygen in the gas discharged from the reactor exhaust gas collecting device 6 and hydrogen discharged from the hydrogen collecting device 9 are combusted in the oxygen removing device 7, the oxygen is consumed, and simultaneously heat is generated to heat the gas;
the gas discharged from the deaerating device 7 enters a methanol preparation device 10, the main components of the gas comprise nitrogen and carbon dioxide, and the carbon dioxide and the hydrogen from the hydrogen collecting device 9 are subjected to chemical reaction under the action of a catalyst at a preset temperature and pressure to generate methanol;
the methanol produced in the methanol production apparatus 10 is stored in the methanol storage apparatus 11.
Examples
The volume ratio of the flue gas of a certain 1000MW boiler is as follows: 73.28% of nitrogen, 12.67% of carbon dioxide, 8.37% of water vapor, 5.4% of oxygen and 0.1% of sulfur dioxide. By utilizing the process provided by the utility model, the unit can extract 220 tons of sulfur dioxide, 19000 tons of carbon dioxide and 7 ten thousand m of hydrogen from the flue gas every day under the full-load working condition3340 tons of sulfuric acid is prepared. 37 tons of methanol can be synthesized by using the prepared hydrogen and the extracted carbon dioxide.
Claims (8)
1. A system for preparing methanol by using sulfur-containing flue gas of a boiler is characterized by comprising a boiler flue (1), a water supply device (2), a Bunsen reactor (3), a sulfuric acid collecting device (4), a hydrogen iodide separating device (5), a reactor exhaust gas collecting device (6), an iodine recovery device (8) and a hydrogen collecting device (9); wherein the content of the first and second substances,
the boiler flue (1) is a flue after boiler denitration and dust removal, the outlet of the boiler flue is connected to the first inlet of the Bunsen reactor (3), the outlet of the water supply device (2) is connected to the second inlet of the Bunsen reactor (3), the first outlet of the Bunsen reactor (3) is connected to the inlet of the sulfuric acid collecting device (4), the second outlet of the Bunsen reactor (3) is connected to the inlet of the hydrogen iodide separating device (5), the third outlet of the Bunsen reactor (3) is connected to the inlet of the reactor exhaust gas collecting device (6), the first outlet of the hydrogen iodide separating device (5) is connected to the inlet of the hydrogen collecting device (9), the second outlet of the hydrogen iodide separating device (5) is connected to the fourth inlet of the Bunsen reactor (3), a third outlet of the hydrogen iodide separation device (5) is connected with an inlet of an iodine recovery device (8), and an outlet of the iodine recovery device (8) is connected with a third inlet of the Bunsen reactor (3).
2. The system for preparing methanol by using boiler sulfur-containing flue gas as claimed in claim 1, wherein the hydrogen iodide separation device (5) is internally provided with a heating and cooling device, and the temperature of the medium in the hydrogen iodide separation device (5) can be adjusted to be between 250 ℃ and 600 ℃ through the operation of the heating and cooling device.
3. The system for preparing methanol by using boiler sulfur-containing flue gas as claimed in claim 1, wherein the hydrogen iodide separation device (5) is filled with a catalyst, hydrogen iodide is partially decomposed into hydrogen and iodine in the device, the hydrogen enters the hydrogen collection device (9), the iodine enters the iodine recovery device (8), and the hydrogen iodide which is not decomposed returns to the Bunsen reactor (3).
4. The system for preparing the methanol by using the sulfur-containing flue gas of the boiler as claimed in claim 1, further comprising a deoxygenation device (7), a methanol preparation device (10) and a methanol storage device (11); wherein the content of the first and second substances,
the outlet of the reactor exhaust gas collecting device (6) is connected with the first inlet of the oxygen removing device (7), the outlet of the oxygen removing device (7) is connected with the first inlet of the methanol preparation device (10), the outlet of the methanol preparation device (10) is connected with the inlet of the methanol storage device (11), the first outlet of the hydrogen collecting device (9) is connected with the second inlet of the oxygen removing device (7), and the second outlet of the hydrogen collecting device (9) is connected with the second inlet of the methanol preparation device (10).
5. The system for preparing methanol by using boiler sulfur-containing flue gas according to claim 4, wherein the oxygen removing device (7) is provided with a burner, oxygen contained in the gas discharged from the reactor exhaust gas collecting device (6) is combusted with hydrogen discharged from the hydrogen collecting device (9), oxygen contained in the gas discharged from the reactor exhaust gas collecting device (6) is consumed, and the heat generated by the combustion heats the gas discharged from the reactor exhaust gas collecting device (6).
6. The system for preparing the methanol by using the sulfur-containing flue gas of the boiler as claimed in claim 4, wherein the heating and cooling device is arranged in the methanol preparation device (10), and the temperature of the medium in the methanol preparation device (10) can be adjusted to be between 250 ℃ and 600 ℃ through the operation of the heating and cooling device.
7. The system for preparing the methanol by using the sulfur-containing flue gas of the boiler as claimed in claim 4, wherein a compressor is arranged in the methanol preparation device (10), and the pressure of the medium entering the methanol preparation device (10) can be increased to 10MPa by the operation of the compressor.
8. The system for preparing methanol by using boiler sulfur-containing flue gas as claimed in claim 4, wherein the methanol preparation device (10) is filled with a catalyst, and carbon dioxide and hydrogen entering the methanol preparation device (10) generate methanol under the action of the catalyst at preset pressure and temperature.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120563668.2U CN215327830U (en) | 2021-03-18 | 2021-03-18 | System for utilize boiler to contain sulfur flue gas system methyl alcohol |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120563668.2U CN215327830U (en) | 2021-03-18 | 2021-03-18 | System for utilize boiler to contain sulfur flue gas system methyl alcohol |
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| CN215327830U true CN215327830U (en) | 2021-12-28 |
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| CN202120563668.2U Active CN215327830U (en) | 2021-03-18 | 2021-03-18 | System for utilize boiler to contain sulfur flue gas system methyl alcohol |
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