CN216778452U - High-efficient aqueous ammonia of active carbon SOx/NOx control dilutes gasification system - Google Patents
High-efficient aqueous ammonia of active carbon SOx/NOx control dilutes gasification system Download PDFInfo
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- CN216778452U CN216778452U CN202123061051.XU CN202123061051U CN216778452U CN 216778452 U CN216778452 U CN 216778452U CN 202123061051 U CN202123061051 U CN 202123061051U CN 216778452 U CN216778452 U CN 216778452U
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Abstract
The utility model provides a gasification system is diluted to high-efficient aqueous ammonia of active carbon SOx/NOx control, is including diluting wind preparation system, ammonia evaporator, empty blender of ammonia, dilution fan, adsorption system, and the dilution wind pipe connection of the wind preparation system output that releases dilutes the fan, and the export of dilution fan passes through the pipe connection empty blender of ammonia, and the aqueous ammonia gas export of ammonia evaporator passes through the pipe connection empty blender of ammonia, and the export of empty blender of ammonia passes through the pipe connection adsorption system. The utility model has the beneficial effects that: according to the characteristics of northern climate, the dilution air is prepared only by hot air generated by heat exchange of the cooling section of the desorption tower, the temperature of the dilution air is not controllable, partial hot air in the heating section of the heating furnace of the desorption tower is utilized to control the temperature of the dilution air, and the denitration reaction of the adsorption tower can normally and stably operate. The hot air after heat exchange in the cooling section is mixed with the hot air in the heating furnace in the heating section to prepare dilution air, so that the exhaust smoke of the heating furnace is reduced, the emission concentration of greenhouse gases is reduced, and the environment is protected. Energy is saved, and the energy utilization efficiency is improved.
Description
Technical Field
The utility model belongs to the field of activated carbon flue gas desulfurization, denitrification and purification, and particularly relates to an activated carbon desulfurization, denitrification and efficient ammonia water dilution gasification system.
Background
Along with the implementation of the policy of environment protection and ultra-low emission, the country increases the pollution control force to the sintering industry in the field of steel and iron, and according to the characteristics of sintering flue gas, an activated carbon purification device is usually adopted for desulfurization and denitrification of the flue gas. In the activated carbon desulfurization and denitrification system, a method of spraying gasified ammonia water to the adsorption tower module is adopted for denitrification, and the gasified ammonia water reacts with nitrogen oxide to generate nitrogen and water, so that the aim of removing the nitrogen oxide in the flue gas is fulfilled.
Because the sintering flue gas has the characteristics that the flue gas volume is big, carry out the denitration and need the aqueous ammonia after a large amount of gasification dilutions, easily produce the condensation behind the aqueous ammonia gasification simultaneously, the demand of flue gas denitration can not be satisfied to conventional aqueous ammonia gasification dilution mode, consequently at active carbon desulfurization denitration system denitration in-process, the aqueous ammonia after a large amount of gasification of high efficiency preparation, it is a technological problem to reduce the condensation of aqueous ammonia after the gasification dilution in transportation process simultaneously, need create new, make active carbon desulfurization denitration clean system denitration process even running.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an efficient ammonia water dilution gasification system for activated carbon desulfurization and denitrification, which can be used for quickly and efficiently preparing a large amount of gasified and diluted ammonia water, so that a denitrification process in the activated carbon desulfurization and denitrification system can be stably operated, and the denitrification efficiency can be improved.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides a gasification system is diluted to high-efficient aqueous ammonia of active carbon SOx/NOx control, is including diluting wind preparation system, ammonia evaporator, the empty blender of ammonia, dilution fan, adsorption system, the dilution wind pipe connection of dilution wind preparation system output dilutes the fan, the export of diluting the fan passes through the empty blender of pipe connection ammonia, the aqueous ammonia gas export of ammonia evaporator passes through the empty blender of pipe connection ammonia, the empty blender export of ammonia passes through the pipe connection adsorption system.
The dilution air preparation system comprises an analysis tower, a heating fan, a heating furnace and a cooling fan, wherein a high-temperature flue gas outlet of the heating furnace is connected with a high-temperature flue gas inlet of a heating section of the analysis tower, a flue gas outlet of the heating section of the analysis tower is connected with the heating fan, and an outlet of the heating fan is simultaneously connected with a flue gas discharge pipeline, a flue gas inlet of the heating furnace and a dilution fan inlet pipeline; the cooling fan introduces air in the atmosphere, an outlet of the cooling fan is connected with an air inlet of a cooling section of the desorption tower, and a heat exchange air outlet of the cooling section of the desorption tower is simultaneously connected with an outer discharge pipeline and an inlet pipeline of the dilution fan.
An electric control valve I is installed on a flue gas inlet pipeline of the heating furnace, a pneumatic control valve I is installed on a flue gas outer discharge pipeline, an electric control valve II is installed on an inlet pipeline leading an outlet of a heating fan to a dilution fan, a pneumatic control valve II is installed on an outer discharge pipeline leading a heat exchange air outlet of a cooling section of the analysis tower, and an electric control valve III is installed on an inlet pipeline leading a heat exchange air outlet of the cooling section of the analysis tower to the dilution fan.
The adsorption system comprises an adsorption tower, an outlet flue gas of the adsorption tower is connected with a chimney, an outlet of an ammonia-air mixer is connected with the adsorption tower, activated carbon discharged from the adsorption tower is sent to a desorption tower, and activated carbon discharged from the desorption tower is sent to the adsorption tower.
And a temperature detection device, a pressure detection device and a flow detection device are arranged on a pipeline of the ammonia air mixer to the adsorption tower.
All pipelines in the system are insulated by aluminum silicate coated galvanized steel plates.
Compared with the prior art, the utility model has the beneficial effects that:
1) according to the characteristics of northern climate, the dilution air is prepared only by hot air generated by heat exchange of the cooling section of the desorption tower, the temperature of the dilution air is not controllable, partial hot air in the heating section of the heating furnace of the desorption tower is utilized to control the temperature of the dilution air, and the denitration reaction of the adsorption tower can normally and stably operate.
2) The hot air after heat exchange in the cooling section is mixed with the hot air in the heating furnace in the heating section to prepare dilution air, so that the exhaust smoke of the heating furnace is reduced, the emission concentration of greenhouse gases is reduced, and the environment is protected.
3) The high-temperature waste gas generated by the heating furnace is utilized to raise the temperature of the dilution air, so that the energy is saved and the energy utilization efficiency is improved.
4) After the dilution air temperature is increased, condensation of gasified ammonia water can be prevented, dilution efficiency is improved, reaction rate is improved, and denitration efficiency of the adsorption tower is improved.
Drawings
FIG. 1 is a process flow diagram of the present invention.
In the figure: the system comprises a heating fan, a 2-electric regulating valve III, a 3-pneumatic regulating valve II, a 4-cooling fan, a 5-pneumatic regulating valve I, a 6-electric regulating valve II, a 7-electric regulating valve I, a 8-heating furnace, a 9-dilution fan, a 10-ammonia water evaporator, a 11-ammonia air mixer, a 12-desorption tower, a 13-adsorption tower, a 14-temperature detection device, a 15-pressure detection device and a 16-flow detection device.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only illustrative and are not intended to limit the present invention.
As shown in fig. 1, a gasification system is diluted to high-efficient aqueous ammonia of active carbon SOx/NOx control, including diluting wind preparation system, ammonia evaporimeter 10, ammonia air mixer 11, dilution fan 9, adsorption system, the dilution wind pipe connection of diluting the wind preparation system output dilutes fan 9, the export of dilution fan 9 passes through pipe connection ammonia air mixer 11, the aqueous ammonia gas export of ammonia evaporimeter 10 passes through pipe connection ammonia air mixer 11, the export of ammonia air mixer 11 passes through pipe connection adsorption system.
The dilution air preparation system comprises an analysis tower 12, a heating fan 1, a heating furnace 8 and a cooling fan 4, wherein a high-temperature flue gas outlet of the heating furnace 8 is connected with a flue gas inlet of a heating section of the analysis tower 12, a flue gas outlet of the heating section of the analysis tower 12 is connected with the heating fan 1, and an outlet of the heating fan 1 is simultaneously connected with a flue gas discharge pipeline, a flue gas inlet of the heating furnace 8 and an inlet pipeline of the dilution fan 9; the cooling fan 4 introduces air in the atmosphere, an outlet of the cooling fan 4 is connected with an air inlet of a cooling section of the desorption tower 12, and a heat exchange air outlet of the cooling section of the desorption tower 12 is simultaneously connected with an external discharge pipeline and an inlet pipeline of the dilution fan 9.
An electric regulating valve I7 is installed on a flue gas inlet pipeline of the heating furnace 8, a pneumatic regulating valve I5 is installed on a flue gas outer discharge pipeline, an electric regulating valve II 6 is installed on an inlet pipeline leading to a dilution fan 9 from an outlet of the heating fan 1, a pneumatic regulating valve II 3 is installed on an outer discharge pipeline leading to a heat exchange air outlet of a cooling section of the analysis tower 12, and an electric regulating valve III 2 is installed on an inlet pipeline leading to the dilution fan 9 from a heat exchange air outlet of the cooling section of the analysis tower 12.
The adsorption system comprises an adsorption tower 13, an outlet flue gas of the adsorption tower 13 is connected with a chimney, an outlet of the ammonia-air mixer 11 is connected with the adsorption tower 13, activated carbon discharged from the adsorption tower 13 is sent to a desorption tower 12, and activated carbon discharged from the desorption tower 12 is sent to the adsorption tower 13.
A temperature detection device 14, a pressure detection device 15, and a flow rate detection device 16 are installed in a pipe leading from the ammonia air mixer 11 to the adsorption tower 13. In the embodiment of the utility model, a thermal resistor is adopted as a temperature detection device 14, a pressure transmitter is adopted as a pressure detection device 15, and a pore plate flowmeter is adopted as a flow detection device 16.
All pipelines in the system are insulated by aluminum silicate coated galvanized steel plates.
An ammonia water gasification method of an active carbon desulfurization and denitrification efficient ammonia water dilution gasification system comprises the following specific steps:
1) the cooling fan 4 pumps air in the environment into a cooling section of the desorption tower 12, heat exchange is carried out through the cooling section of the desorption tower 12, high-temperature hot air is generated, one part of the high-temperature hot air is discharged outside under the regulation of the pneumatic regulating valve II 3 and the electric regulating valve III 2, and the other part of the high-temperature hot air is used for preparing dilution air;
2) high-temperature flue gas generated by the heating furnace 8 is extracted by the heating fan 1, the activated carbon is analyzed in a heating section of the analysis tower 12 and then discharged, the amount of the discharged flue gas is controlled by a pneumatic adjusting valve I5, part of the discharged flue gas returns to the heating furnace 8, the amount of the returned flue gas is controlled by an electric valve I7, and part of the hot flue gas is used for preparing dilution air through an electric valve II 6;
3) high-temperature gas generated by the heating section and the cooling section of the desorption tower 12 is mixed and is introduced into the ammonia-air mixer 11 as dilution air through a dilution fan;
4) ammonia water with the concentration of 18 wt% -20 wt% is prepared into ammonia water gas through an ammonia water evaporator 10, wherein the ammonia water accounts for 3 wt% -5 wt% and enters an ammonia air mixer 11, a dilution fan 9 pumps prepared dilution air into the ammonia air mixer 11 (the dilution fan is a variable frequency fan and is used for one purpose), the ammonia water gas is further diluted, a flow detection device 16 detects the ammonia spraying amount, the frequency of the dilution fan 9 is adjusted according to the concentration of nitrogen oxides in flue gas, the ammonia spraying amount is adjusted, and finally the ammonia water is sprayed into an adsorption tower 13 to carry out denitration reaction.
The temperature of the mixed gas in the step 3) is more than 150 ℃. Temperature-detecting device 14 interlocks with pneumatic control valve I5, electrical control valve II 6, electrical control valve I7, and when the mixed air temperature was less than 150 ℃, II 6 apertures of electrical control valve increased, and pneumatic control valve I5, the corresponding reduction of I7 apertures of electrical control valve. If the accident state happens, the pneumatic regulating valve I5 can be quickly opened, and the flue gas of the heating furnace 8 is normally diffused, so that the safety production is ensured.
The pressure of the ammonia water gas outlet pipeline in the step 4) is 4-8 kpa. The pressure detection means 15 detects the pressure.
According to the utility model, a part of high-temperature gas in the heating section of the desorption tower 12 is introduced for preparing dilution air, so that the temperature of the dilution air is effectively increased, the gasification and dilution efficiency of ammonia water is improved, and the stable operation of a denitration reaction is ensured.
Introduce the preparation of diluting the wind with 12 heating sections high temperature gas of desorption tower, produced the condensation when having avoided diluting the aqueous ammonia after the gasification, dilute the shortcoming of inefficiency, satisfy and spout the required temperature requirement of ammonia, improve activated carbon denitration system stability.
A temperature detection device 14 is arranged behind the ammonia-air mixer and to the adsorption tower pipeline and is interlocked with a pneumatic adjusting valve I5 for discharging flue gas out of a heating furnace 8, an electric adjusting valve I7 for returning high-temperature flue gas to the heating furnace 8 and an electric adjusting valve II 6 for taking high-temperature flue gas, and the temperature of mixed dilution air can be adjusted through the opening of the adjusting valves, so that the temperature of the dilution air can be controlled. .
The utility model selects an ammonia water evaporator 10, the diluted air and the ammonia water evaporated and gasified by the ammonia water evaporator 10 are fully mixed in an ammonia-air mixer 11, and an ammonia water dilution fan 9 (used once for standby) pumps the mixed gas into an adsorption tower for denitration reaction.
The dilution fan 9 is a variable frequency fan, and is provided with a flow detection device 16, so that the flow of dilution air can be adjusted according to the concentration of nitrogen oxides.
The outer flue gas of heating furnace 8 arranges pneumatic control valve I5, and when the system broke down, the valve can be opened fast, and 8 steam of heating furnace normally diffuse, ensure safety in production.
Claims (6)
1. The utility model provides a gasification system is diluted to high-efficient aqueous ammonia of active carbon SOx/NOx control, its characterized in that, including diluting wind preparation system, ammonia evaporimeter, ammonia air mixer, dilution fan, adsorption system, dilute the wind pipe connection of the output of wind preparation system and dilute the fan, the export of dilution fan passes through pipe connection ammonia air mixer, the aqueous ammonia gas export of ammonia evaporimeter passes through pipe connection ammonia air mixer, the export of ammonia air mixer passes through pipe connection adsorption system.
2. The system of claim 1, wherein the dilution air preparation system comprises a desorption tower, a heating fan, a heating furnace and a cooling fan, a high-temperature flue gas outlet of the heating furnace is connected with a high-temperature flue gas inlet of a heating section of the desorption tower, a flue gas outlet of the heating section of the desorption tower is connected with the heating fan, and an outlet of the heating fan is simultaneously connected with a flue gas discharge pipeline, a flue gas inlet of the heating furnace and a dilution fan inlet pipeline; the cooling fan introduces air in the atmosphere, an outlet of the cooling fan is connected with an air inlet of a cooling section of the desorption tower, and a heat exchange air outlet of the cooling section of the desorption tower is simultaneously connected with an outer discharge pipeline and an inlet pipeline of the dilution fan.
3. The system of claim 2, wherein an electric control valve I is installed on a flue gas inlet pipeline of the heating furnace, an electric control valve I is installed on a flue gas outer discharge pipeline, an electric control valve II is installed on an inlet pipeline leading from an outlet of a heating fan to a dilution fan, an electric control valve II is installed on an outer discharge pipeline leading from a heat exchange air outlet of the cooling section of the desorption tower, and an electric control valve III is installed on an inlet pipeline leading from the heat exchange air outlet of the cooling section of the desorption tower to the dilution fan.
4. The system of claim 1, wherein the adsorption system comprises an adsorption tower, flue gas at an outlet of the adsorption tower is connected with a chimney, an outlet of the ammonia-air mixer is connected with the adsorption tower, activated carbon discharged from the adsorption tower is sent to a desorption tower, and activated carbon discharged from the desorption tower is sent to the adsorption tower.
5. The system for diluting and gasifying the activated carbon desulfurization and denitrification efficient ammonia water according to claim 4, wherein a temperature detection device, a pressure detection device and a flow detection device are installed on a pipeline leading from the ammonia air mixer to the adsorption tower.
6. The system of claim 4, wherein the pipelines in the system are insulated by aluminum silicate coated galvanized steel plates.
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| CN202123061051.XU CN216778452U (en) | 2021-12-07 | 2021-12-07 | High-efficient aqueous ammonia of active carbon SOx/NOx control dilutes gasification system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114159955A (en) * | 2021-12-07 | 2022-03-11 | 鞍钢集团工程技术有限公司 | Activated carbon desulfurization and denitrification efficient ammonia water dilution gasification system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114159955A (en) * | 2021-12-07 | 2022-03-11 | 鞍钢集团工程技术有限公司 | Activated carbon desulfurization and denitrification efficient ammonia water dilution gasification system and method |
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