CN209735316U - Boiler flue gas denitrification equipment - Google Patents
Boiler flue gas denitrification equipment Download PDFInfo
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- CN209735316U CN209735316U CN201920341465.1U CN201920341465U CN209735316U CN 209735316 U CN209735316 U CN 209735316U CN 201920341465 U CN201920341465 U CN 201920341465U CN 209735316 U CN209735316 U CN 209735316U
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Abstract
A boiler flue gas denitrification device comprises a urea dissolving tank, wherein a liquid outlet is formed in one side of the urea dissolving tank and is connected with a urea solution pump through a liquid conveying pipe; the top end of the urea dissolving tank is provided with a cover, and the cover is provided with a water filling port. The water filling port is connected with the cooling circulation tank through a water pipe, the urea solution pump is connected with the pressure stabilizing device through a liquid conveying pipe, the pressure stabilizing device is connected with the urea solution spray gun through the liquid conveying pipe, and the urea solution is sprayed into a boiler hearth through the urea solution spray gun. The bottom of urea dissolving tank is provided with the inlet, and urea dissolving tank is connected through the inlet to water pipe one end, and the bottom of cooling tank is connected to the other end. Running water is injected into the urea dissolving tank and connected with the cooling tank through a water pipe, the cooling tank is connected with the cooling water circulating pump through a water pipe, the cooling water circulating pump is connected with the urea solution spray gun through a water pipe, and the urea solution spray gun is connected with the urea solution tank. The equipment has low production and processing cost and remarkable denitrification effect, and effectively reduces the pollution of nitrogen oxides in the boiler flue gas to the atmosphere.
Description
Technical Field
The utility model belongs to the technical field of boiler equipment, concretely relates to boiler flue gas denitrification equipment.
Background
In some large units or communities needing heat supply, such as hospitals, schools or residential areas, boilers are used for providing hot water for life or heating in winter, and the boilers provide great convenience for life and work of people. However, although the boiler provides a good heat energy when put into use, harmful gases containing sulfur and nitrogen are generated, which seriously pollutes the environment. At present, environmental protection departments in China and various cities highly attach importance to environmental problems, and the national regulations of environment protection law of coming out are as follows: the method requires that the emission of sulfur dioxide is not more than 200mg/m during the cultivation, the emission of nitrogen oxides is not more than 200mg/m during the cultivation, and the emission of particulate matters is not more than 30 mg/m during the cultivation, so that the environmental pollution is reduced.
Although many places and units already use boilers with desulfurization and denitrification devices, the devices have complex structures and high cost, and are not suitable for some economic laggard areas or units with poor economic conditions.
Disclosure of Invention
The utility model aims at providing a boiler flue gas denitrification equipment can effectively reduce the nitrogen oxide content in the boiler flue gas emission.
The utility model adopts the technical proposal that the boiler flue gas denitrification device comprises a urea dissolving tank, one side of the urea dissolving tank is provided with a liquid outlet, and the liquid outlet is connected with a urea solution pump through a liquid conveying pipe; the top end of the urea dissolving tank is provided with a cover, and the cover is provided with a water filling port. The water filling port is connected with the cooling circulation tank through a water pipe, and a valve is arranged on the water pipe. The urea solution pump is connected with the pressure stabilizing device through a liquid conveying pipe, the pressure stabilizing device is connected with the urea solution spray gun through the liquid conveying pipe, the urea solution spray gun is arranged in the boiler furnace, a valve is arranged at the liquid conveying pipe at the upper section of the urea solution spray gun, and the urea solution is sprayed into the boiler furnace through the urea solution spray gun under the control of the valve. The bottom of urea dissolving tank is provided with the inlet, and urea dissolving tank is connected through the inlet to water pipe one end, and the bottom of cooling tank is connected to the other end. Running water is injected into the urea dissolving tank and connected with the cooling tank through a water pipe, and valves are arranged on the water pipes at the inlet positions of the urea dissolving tank and the cooling tank. The cooling tank is connected with a cooling water circulating pump through a water pipe, the cooling water circulating pump is connected with a urea solution spray gun through a water pipe, and the urea solution spray gun is connected with the urea solution tank.
Preferably, the liquid outlet and the water inlet are both provided with filter screens.
the beneficial effects of the utility model are that, utilize the principle of urea hydrolysis system ammonia in this equipment, dissolve urea in the urea dissolving tank, make urea solution, spout urea solution into boiler furnace through the urea solution spray gun in, utilize boiler furnace high temperature heat source with urea solution in furnace and decompose the production ammonia, through ammonia and the boiler in nitric oxide and the nitrogen dioxide reaction reach the purpose that reduces boiler nitrogen oxide's content.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1. the urea dissolving device comprises a urea dissolving tank, a 2. liquid outlet, a 3. liquid conveying pipe, a 4. urea solution pump, a 5. liquid inlet, a 6. pressure stabilizing device, a 7. cover, a 8. water filling port, a 9. valve, a 10. boiler, a 11. urea solution spray gun, a 12. tap water pipe, a 13. water pipe, a 14. cooling water circulating pump and a 15. cooling tank.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The utility model provides a boiler flue gas denitrification equipment, as shown in figure 1, this flue gas denitrification equipment includes urea dissolving tank 1, and one side of urea dissolving tank 1 is equipped with liquid outlet 2, liquid outlet 2 passes through transfer line 3 and connects urea solution pump 4, and 1 top of urea dissolving tank is equipped with lid 7, is equipped with water filling port 8 on the lid 7. The water injection port 8 is connected with a cooling tank 15 through a water pipe 13, and a valve is arranged on the water pipe. Urea solution pump 4 passes through transfer line 3 and connects voltage regulator 6, and voltage regulator 6 passes through the transfer line and connects urea solution spray gun 11, and urea solution spray gun 11 sets up on boiler 10 furnace, and the transfer line department of 11 upper segments of urea solution spray gun is equipped with the valve, under this valve control, urea dissolves the back at urea dissolving tank 1, through liquid outlet 2, through transfer line 3, after by 4 pressure boost of urea solution pump, through voltage regulator 6, through transfer line 3, get into urea solution spray gun head 11, spout the urea solution into boiler 10 furnace.
The bottom of urea dissolving tank 1 is provided with inlet 5, and urea dissolving tank 1 is connected through inlet 5 to water pipe one end, and the bottom of cooling tank 15 is connected to the other end. Tap water is injected into the urea dissolving tank 1 and the cooling tank 15 through water pipes, and valves are arranged on the water pipes at the inlet positions of the urea dissolving tank 1 and the cooling tank 15. The cooling tank 15 is connected with a cooling water circulating pump 14 through a water pipe, the cooling water circulating pump 14 is connected with a urea solution spray gun 11 through a water pipe, and the urea solution spray gun is connected with the urea solution tank to form a circulating loop. After entering the cooling water tank 15 from the tap water port 12, the tap water cools the urea solution spray gun head 11 through the cooling water circulating pump 14 and the water pipe 13, and enters the cooling water tank 15 for circulation and the urea solution tank 1 for liquid replenishment respectively.
Furthermore, filter screens are arranged at the liquid outlet 2 and the water inlet 5. Can filter impurities to prevent the infusion tube 3 from being blocked.
The utility model relates to a boiler flue gas denitrification equipment's theory of operation does, utilizes the principle of urea hydrolysis ammonia production, dissolve 1 interior water injection to urea through water inlet 5, then dissolve urea in urea dissolving tank 1, make the urea solution, utilize urea solution spray gun 11 to spout the urea solution into boiler 10 in, utilize boiler 10 furnace temperature to decompose the urea solution in furnace as the heat source and produce the ammonia, the ammonia reaches the purpose that reduces nitrogen oxide's content with nitrogen dioxide reaction in the boiler.
The urea hydrolysis ammonia production technology takes the temperature of a boiler hearth as a heat source to decompose urea solution in the hearth to generate ammonia gas, and the reaction process is as follows:
CO(NH) + HO NHCONH
The ammonia reacts with nitric oxide and nitrogen dioxide in the boiler to reduce the content of nitrogen oxide, and the reaction process is as follows:
4NH + 4NO + O 4N + 6HO
4NH3 + 2NO2 + O2 3N2 + 6H2O
The utility model discloses simple structure, the production and processing cost is low, and the denitrogenation effect is showing, has effectively reduced nitrogen oxide to atmospheric pollution in the boiler flue gas.
Claims (2)
1. A boiler flue gas denitrification device is characterized by comprising a urea dissolving tank, wherein a liquid outlet is formed in one side of the urea dissolving tank and is connected with a urea solution pump through a liquid conveying pipe; the urea dissolving tank is provided with a cover on the top, the cover is provided with a water filling port, the water filling port is connected with a cooling circulation tank through a water pipe, a valve is arranged on the water pipe, the urea solution pump is connected with a pressure stabilizing device through a liquid pipe, the pressure stabilizing device is connected with a urea solution spray gun through a liquid pipe, the urea solution spray gun is arranged in a boiler furnace, the liquid pipe at the upper section of the urea solution spray gun is provided with a valve, under the control of the valve, the urea solution is sprayed into the boiler furnace through the urea solution spray gun, the bottom end of the urea dissolving tank is provided with a liquid inlet, one end of the water pipe is connected with the urea dissolving tank through the liquid inlet, the other end of the water pipe is connected with the bottom end of the cooling tank, tap water is injected into the urea dissolving tank through the water pipe and is connected with the cooling tank, the urea solution spray gun is connected with the urea solution tank.
2. The boiler flue gas denitrification apparatus as recited in claim 1, wherein the liquid outlet and the water inlet are provided with filter screens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920341465.1U CN209735316U (en) | 2019-03-18 | 2019-03-18 | Boiler flue gas denitrification equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920341465.1U CN209735316U (en) | 2019-03-18 | 2019-03-18 | Boiler flue gas denitrification equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209735316U true CN209735316U (en) | 2019-12-06 |
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ID=68717312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920341465.1U Active CN209735316U (en) | 2019-03-18 | 2019-03-18 | Boiler flue gas denitrification equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209735316U (en) |
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2019
- 2019-03-18 CN CN201920341465.1U patent/CN209735316U/en active Active
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