CN218890546U - Combined device for recycling polluted nitrogen - Google Patents
Combined device for recycling polluted nitrogen Download PDFInfo
- Publication number
- CN218890546U CN218890546U CN202223529410.4U CN202223529410U CN218890546U CN 218890546 U CN218890546 U CN 218890546U CN 202223529410 U CN202223529410 U CN 202223529410U CN 218890546 U CN218890546 U CN 218890546U
- Authority
- CN
- China
- Prior art keywords
- air
- pipe
- communicated
- nitrogen
- purifier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses a combination unit for reutilization of polluted nitrogen, which relates to the technical field of coal chemical equipment, and comprises a pulverized coal preparation system and an air purification system, wherein: the pulverized coal preparation system comprises a hot blast stove, a coal mill and a bag filter, wherein the hot blast stove is communicated with a fuel gas pipeline and a combustion air pipe, the air outlet end of the hot blast stove is communicated with the air inlet end of the coal mill, the discharge pipe of the coal mill is in butt joint with the feed inlet of the bag filter, and the exhaust pipe of the bag filter is communicated with the air inlet pipe of the hot blast stove through a fan; the air purification system comprises a steam heater and two air purifiers which are arranged in parallel and used alternately, wherein the air inlet end of the steam heater is communicated with an air inlet sewage nitrogen pipe, the air outlet end of the steam heater is communicated with the air purifier through an air inlet purifier sewage nitrogen main pipe, and the air outlet end of the air purifier is communicated with a blow-down pipe and an air outlet purifier sewage nitrogen main pipe; the main sewage nitrogen pipe of the inlet purifier is communicated with a cold blowing sewage nitrogen pipe, and the main sewage nitrogen pipe of the outlet purifier is communicated with an air inlet pipe of the hot blast stove. The device can realize recycling of the heat-polluted nitrogen.
Description
Technical Field
The utility model relates to the technical field of coal chemical equipment, in particular to a combined device for recycling polluted nitrogen.
Background
The pulverized coal preparation system has the functions of drying and grinding raw coal into qualified pulverized coal with granularity and water content meeting the requirements of conveying and gasification, and is an indispensable important component in the pulverized coal pressurized gasification process. In the pulverized coal preparation system, the coal mill and the drying process are carried out under the inert gas environment (low oxygen concentration), so that spontaneous combustion and dust explosion of the pulverized coal can be prevented, the dew point is controlled within a certain range by adding dilution gas at the downstream of a pulverized coal bag filter, and the dilution gas is atmospheric nitrogen from air separation. The outlet temperature of the hot blast stove, namely the temperature of the dry gas entering the coal mill is generally controlled to be 150-270 ℃, the temperature of the dry gas when exiting the coal mill is 100-110 ℃, the dry gas needs to be heated and heated by the combustion of fuel gas or purge gas, and the outlet temperature of the hot blast stove is kept within an index range.
The regeneration process is generally divided into a depressurization process, a heating process, a cooling process and a pressure increasing process, wherein the heating and cooling process takes most of the whole regeneration time, the heating and cooling stages use polluted nitrogen, the polluted nitrogen is heated and warmed in the heating process and then is sent to an adsorber, water, carbon dioxide and other hydrocarbon in the polluted nitrogen are desorbed, and the polluted nitrogen is discharged to the atmosphere through an emptying silencer. The polluted nitrogen is not heated in the process of blowing, but the temperature of the polluted nitrogen discharged from the adsorber is higher in the heating later period and the blowing earlier period, and the part of heat is completely discharged into the atmosphere.
Disclosure of Invention
The utility model aims at the needs and the shortcomings of the prior art and provides a combined device for recycling polluted nitrogen.
The utility model relates to a combination unit for reutilizing polluted nitrogen, which solves the technical problems and adopts the following technical scheme:
a combination of dirty nitrogen recycling, which relates to a pulverized coal preparation system and an air purification system, wherein,
the pulverized coal preparation system comprises a hot blast stove, a coal mill and a bag filter, wherein the hot blast stove is communicated with a fuel gas pipeline and a combustion air pipe, a combustion air blower is communicated with the combustion air pipe, the air outlet end of the hot blast stove is communicated with the air inlet end of the coal mill, the discharge pipe of the coal mill is in butt joint with the feed inlet of the bag filter, the discharge port of the bag filter discharges pulverized coal, the exhaust pipe of the bag filter is communicated with the air inlet pipe of the hot blast stove through a circulating fan, and the air inlet pipe is communicated with a hot flue gas blow-down pipe;
the air purification system comprises a steam heater and two air purifiers, the two air purifiers are arranged in parallel and used alternately, an air inlet end of the steam heater is communicated with an air inlet sewage nitrogen pipe and a steam air inlet pipe, an air outlet end of the steam heater is simultaneously communicated with the two air purifiers through an air inlet purifier sewage nitrogen main pipe, and an air outlet end of the two air purifiers is communicated with an air vent pipe through an air vent valve and is simultaneously communicated with an air purifier sewage nitrogen main pipe through an adjusting valve;
the main sewage pipe of the inlet purifier is communicated with a cold blowing sewage nitrogen pipe, and the main sewage pipe of the outlet purifier is also communicated with an air inlet pipe of the hot blast stove through a sewage nitrogen blower.
Optionally, the temperature of the polluted nitrogen gas which is introduced into the air inlet polluted nitrogen pipe and the cold blowing polluted nitrogen pipe is between 30 ℃ and 35 ℃, and the pressure is 112Kpa.
Optionally, the air inlet end and the discharge end of the coal mill are respectively provided with a thermometer;
the temperature of the air inlet end of the coal mill is not more than 350 ℃, and the temperature of the discharge pipe of the coal mill is not more than 120 ℃.
Optionally, a temperature measuring instrument is arranged at the air outlet end of the air purifier;
the temperature of the polluted nitrogen discharged from the air outlet end of the air purifier is less than 200 ℃, at the moment, the emptying valve is in an open state, the regulating valve is in a closed state, when the temperature of the polluted nitrogen is reduced to 150 ℃, the emptying valve is closed, the regulating valve is opened, and the polluted nitrogen is introduced into the hot blast stove through a polluted nitrogen main pipe of the outlet purifier.
Preferably, the temperature measuring instrument specifically adopts a temperature sensor, and the vent valve and the regulating valve are electronic valves; the temperature sensor automatically controls the opening and closing of the emptying valve and the regulating valve through the controller.
Optionally, when the temperature of the polluted nitrogen discharged from the air outlet end of the air purifier is smaller than the temperature of the discharge pipe of the coal mill, the regulating valve is closed, the vent valve is opened, and external air is introduced into the hot blast stove through the fuel gas pipeline and the combustion air pipe.
Compared with the prior art, the combined device for recycling the polluted nitrogen has the beneficial effects that:
(1) The utility model recycles the originally emptied heat polluted nitrogen, and recycles the heat of the part of heat polluted nitrogen, thereby reducing the fuel gas consumption of the hot blast stove on one hand and the low-pressure nitrogen consumption on the other hand, and having remarkable economic benefit;
(2) According to the utility model, after the hot dirty nitrogen is utilized, the nitrogen concentration in the pulverized coal preparation system is increased, and the oxygen content in the circulating gas is further reduced, so that the whole pulverized coal preparation system can be under the protection of the nitrogen in the operation and the shutdown, the explosion prevention and the spontaneous combustion of the coal in the operation are effectively prevented, and the safe operation of the pulverized coal preparation system is ensured;
(3) The pulverized coal preparation system of the utility model adds a large amount of polluted nitrogen, so that the requirement of oxygen concentration is not required to be met by controlling the air discharge of the hot blast stove alone, and the method is beneficial to reducing the water and gas content of the circulating gas after the air discharge capacity of the coal mill is increased.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model.
The reference numerals in the drawings represent:
1. coal mill, 2, feeding pipe, 3, discharging pipe, 4, bag filter,
5. an air outlet end of the hot blast stove, 6, an exhaust pipe, 7, a circulating fan, 8 and an air inlet pipe,
9. a hot blast stove, a sewage gas pipe of a 10-way air outlet blower, 11, a combustion air pipe,
12. combustion air blower, 13, dirty nitrogen blower, 14, dirty nitrogen header of the purifier,
15. an air inlet nitrogen pollution pipe, 16, a steam heater, 17 and a steam inlet pipe,
18. cold blowing nitrogen pipe, 19, purifying device nitrogen inlet main pipe, 20, upper branch pipe,
21. an air purifier 22, a lower branch pipe 23, a blow-down pipe,
24. air pipes of the purifier, 25, air pipes, 26 and hot flue gas blow-down pipes,
27. fuel gas lines, 28, purge valves, 29, regulating valves.
Detailed Description
In order to make the technical scheme, the technical problems to be solved and the technical effects of the utility model more clear, the technical scheme of the utility model is clearly and completely described below by combining specific embodiments.
Embodiment one:
with reference to fig. 1, this embodiment proposes a combination of dirty nitrogen recycling, which relates to a pulverized coal preparation system and an air purification system.
The pulverized coal preparation system comprises a hot blast stove 9, a coal mill 1 and a bag filter 4. The hot blast stove 9 is communicated with a fuel gas pipeline 27 and a combustion air pipe 11, and the combustion air pipe 11 is communicated with a combustion air blower 12; the air outlet end 5 of the hot blast stove 9 is communicated with the air inlet end of the coal mill 1, the coal mill 1 is provided with a feed pipe 2, the discharge pipe 3 of the coal mill 1 is in butt joint with the feed inlet of the bag filter 4, the discharge port of the bag filter 4 discharges coal dust, the exhaust pipe 6 of the bag filter 4 is communicated with the air inlet pipe 8 of the hot blast stove 9 through a circulating fan 7, and the air inlet pipe 8 is communicated with a hot flue gas blow-down pipe 26;
the air purification system comprises a steam heater 16 and two air purifiers 21, the two air purifiers 21 are arranged in parallel and used alternately, an air inlet end of the steam heater 16 is communicated with an air inlet sewage nitrogen pipe 15 and an air inlet pipe 17, an air outlet end of the steam heater 16 is simultaneously communicated with the two air purifiers 21 through an air inlet purifier sewage nitrogen main pipe 19, and an air outlet end of the two air purifiers 21 is communicated with an air vent pipe 23 through an air vent valve 28 and is simultaneously communicated with an air purifier sewage nitrogen main pipe 14 through an adjusting valve 29.
The inlet purifier waste nitrogen main pipe 19 is communicated with a cold blowing waste nitrogen pipe 18, the outlet purifier waste nitrogen main pipe 14 is connected with a waste nitrogen blower 13, and the waste nitrogen blower 13 is communicated with the air inlet pipe 8 of the hot blast stove 9 through the outlet blower waste nitrogen pipe 10.
In this example, the dirty nitrogen gas temperature introduced into the inlet dirty nitrogen pipe 15 and the cold-blown dirty nitrogen pipe 18 is between 30 ℃ and 35 ℃ and the pressure is 112Kpa.
In the embodiment, the air inlet end and the discharge end of the coal mill are respectively provided with a thermometer;
the temperature of the air inlet end of the coal mill 1 is not higher than 350 ℃, and the temperature of the discharge pipe of the coal mill 1 is not higher than 120 ℃.
The air outlet end of the air purifier is provided with a temperature measuring instrument. In the working process of the air purification system, when the temperature of the polluted nitrogen discharged from the air outlet end of the air purifier 21 is lower than 200 ℃, the air release valve 28 is in an open state, the regulating valve 29 is in a closed state, when the temperature of the polluted nitrogen is reduced to 150 ℃, the air release valve 28 is closed, the regulating valve 29 is opened, and the polluted nitrogen is introduced into the hot blast stove 9 through the polluted nitrogen main pipe 14 of the purifier, so that the recycling of the polluted nitrogen is realized. When the temperature of the polluted nitrogen discharged from the air outlet end of the air purifier 21 is lower than the temperature of the discharge pipe 3 of the coal mill 1, on one hand, the regulating valve 29 is closed, the emptying valve 28 is opened, the polluted nitrogen discharged from the air purifier 21 is emptied into the atmosphere through the emptying pipe 23, and on the other hand, the external air is introduced into the hot blast stove 9 through the fuel gas pipeline 27 and the combustion air pipe 11.
It should be added that each air purifier 21 has an upper branch pipe 20 and a lower branch pipe 22; the upper branch pipes 20 of the two air purifiers 21 are respectively communicated into the purifier sewage nitrogen header pipe 19, and an air pipe 25 is communicated between the upper branch pipes 20 of the two air purifiers 21; the lower branch pipes 22 of the two air purifiers 21 are respectively provided with a vent valve 28 and a regulating valve 29, and an air inlet purifier air pipe 24 is communicated between the lower branch pipes 22 of the two air purifiers 21.
The temperature measuring instrument specifically adopts a temperature sensor, and the vent valve and the regulating valve are electronic valves;
the temperature sensor automatically controls the opening and closing of the emptying valve and the regulating valve through the controller.
In summary, the combined device for recycling the polluted nitrogen can fully utilize the hot polluted nitrogen discharged into the atmosphere and reduce the fuel gas consumption of the hot blast stove.
The foregoing has outlined rather broadly the principles and embodiments of the present utility model in order that the detailed description of the utility model may be better understood. Based on the above-mentioned embodiments of the present utility model, any improvements and modifications made by those skilled in the art without departing from the principles of the present utility model should fall within the scope of the present utility model.
Claims (6)
1. A combination unit for reutilization of polluted nitrogen is characterized in that the combination unit relates to a pulverized coal preparation system and an air purification system, wherein,
the pulverized coal preparation system comprises a hot blast stove, a coal mill and a bag filter, wherein the hot blast stove is communicated with a fuel gas pipeline and a combustion air pipe, the combustion air pipe is communicated with a combustion air blower, the air outlet end of the hot blast stove is communicated with the air inlet end of the coal mill, the discharge pipe of the coal mill is in butt joint with the feed inlet of the bag filter, the discharge port of the bag filter discharges pulverized coal, the exhaust pipe of the bag filter is communicated with the air inlet pipe of the hot blast stove through a circulating fan, and the air inlet pipe is communicated with a hot flue gas blow-down pipe;
the air purification system comprises a steam heater and two air purifiers, wherein the two air purifiers are arranged in parallel and used alternately, an air inlet end of the steam heater is communicated with an air inlet sewage nitrogen pipe and an air inlet pipe, an air outlet end of the steam heater is simultaneously communicated with the two air purifiers through an air inlet purifier sewage nitrogen main pipe, and an air outlet end of the two air purifiers is communicated with an air vent pipe through an air vent valve and is simultaneously communicated with an air purifier sewage nitrogen main pipe through an adjusting valve;
the main sewage pipe of the inlet purifier is communicated with a cold blowing sewage nitrogen pipe, and the main sewage pipe of the outlet purifier is also communicated with an air inlet pipe of the hot blast stove through a sewage nitrogen blower.
2. A combination unit according to claim 1, wherein the dirty nitrogen gas introduced into the inlet and cold-blown dirty nitrogen pipes is at a temperature of between 30 ℃ and 35 ℃ and a pressure of 112Kpa.
3. The combination unit for reutilization of polluted nitrogen as claimed in claim 1, wherein the air inlet end and the air outlet end of the coal mill are respectively provided with a thermometer;
the temperature of the air inlet end of the coal mill is not more than 350 ℃, and the temperature of the discharge pipe of the coal mill is not more than 120 ℃.
4. A combination unit for reutilization of polluted nitrogen as claimed in claim 3, wherein the air outlet end of the air purifier is provided with a temperature measuring instrument;
the temperature of the polluted nitrogen discharged from the air outlet end of the air purifier is less than 200 ℃, at the moment, the emptying valve is in an open state, the regulating valve is in a closed state, when the temperature of the polluted nitrogen is reduced to 150 ℃, the emptying valve is closed, the regulating valve is opened, and the polluted nitrogen is introduced into the hot blast stove through a polluted nitrogen main pipe of the outlet purifier.
5. The combination of claim 4, wherein the temperature measuring device is a temperature sensor, and the vent valve and the regulating valve are electronic valves;
the temperature sensor automatically controls the opening and closing of the emptying valve and the regulating valve through the controller.
6. The combination unit according to claim 4, wherein when the temperature of the dirty nitrogen discharged from the air outlet end of the air purifier is lower than the temperature of the discharge pipe of the coal mill, the regulating valve is closed, the vent valve is opened, and the external air is introduced into the hot blast stove through the fuel gas pipeline and the combustion air pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223529410.4U CN218890546U (en) | 2022-12-29 | 2022-12-29 | Combined device for recycling polluted nitrogen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223529410.4U CN218890546U (en) | 2022-12-29 | 2022-12-29 | Combined device for recycling polluted nitrogen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218890546U true CN218890546U (en) | 2023-04-21 |
Family
ID=85995784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223529410.4U Active CN218890546U (en) | 2022-12-29 | 2022-12-29 | Combined device for recycling polluted nitrogen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218890546U (en) |
-
2022
- 2022-12-29 CN CN202223529410.4U patent/CN218890546U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105241262B (en) | A kind of heating furnace pure oxygen burning and carbon dioxide capture systems and technique | |
| CN105944564A (en) | Coke oven flue gas waste heat recycling, desulfuration and denitration integrated system and method | |
| CN102047040B (en) | Method of controlling flow rate of primary recirculating exhaust gas in oxygen combustion boiler and apparatus therefor | |
| CN103890197A (en) | Method of operating regenerative heaters in blast furnace plant | |
| CN107138515A (en) | A kind of heat supply method of energy-saving and emission-reduction | |
| CN206056363U (en) | A kind of heat accumulating type organic waste gas treatment device | |
| CN104083963A (en) | Deduster heating system and heating method | |
| CN110595221A (en) | Tail gas recycling device and process for galvanizing continuous annealing furnace | |
| CN218890546U (en) | Combined device for recycling polluted nitrogen | |
| CN206027727U (en) | Absorbent regeneration and regeneration exhaust treatment device when coke oven gas alternating temperature adsorbs desulfurization | |
| CN201850285U (en) | Dry dust-collecting system for converter | |
| CN206176412U (en) | Energy -saving organic waste gas waste heat utilization equipment | |
| CN112156612A (en) | Organic waste gas treatment system | |
| CN110594762A (en) | Energy-saving low-temperature methanol washing tail gas treatment device | |
| CN111321263A (en) | Blast furnace raw gas heating method and device | |
| CN104006672A (en) | Method for smoke discharging and dedusting of steel making electric furnace | |
| CN203463157U (en) | Clean synthetic gas preheating system for improving performance of IGCC (integrated gasification combined cycle) power generation facilities | |
| CN106678850A (en) | Desulfurating water waste heat recovering and utilizing system for boiler | |
| CN108239551A (en) | The method and system of NOx content in a kind of reduction coke oven flue gas | |
| CN206549438U (en) | Organic waste gas treatment system under exhaust gas concentration fluctuation operating mode | |
| CN219640274U (en) | Pyrolysis gas treatment device | |
| CN216106775U (en) | Dry quenching desulfurization flue gas temperature rise control system | |
| CN219223356U (en) | Coal gas energy cascade utilization system of submerged arc furnace | |
| CN217746475U (en) | Coke oven flue gas purification system | |
| CN210905665U (en) | Denitration system of on-line regeneration SCR catalyst |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |