Boiler denitration ammonia supply system
By installing a purging pipe on the ammonia supply pipeline, high-pressure ammonia gas is used to remove ash and scale, solving the problem of ash and scale blockage in the ammonia supply system and ensuring the normal operation of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-10
- Publication Date
- 2026-03-17
AI Technical Summary
Scale and grime easily accumulate on the inner walls of ammonia supply pipelines. After the scale and grime fall off, they often cause blockage of the filter screen and flow meter, affecting the ammonia supply flow and endangering the normal operation of environmental protection equipment.
A purge pipe is installed on the ammonia supply pipeline, and the high-pressure ammonia gas in the liquid ammonia storage tank is used to purge the filter screen and flow meter under high pressure to remove the adhering dirt.
This effectively prevents dirt and grime from clogging the filter and flow meter, ensuring a stable ammonia supply flow and preventing malfunctions of environmental protection equipment.
Smart Images
Figure CN223995801U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of ammonia supply systems, specifically a boiler denitrification ammonia supply system. Background Technology
[0002] The ammonia supply pipeline of the boiler denitrification ammonia supply system is used to supply ammonia gas to the boiler flue. The ammonia supply pipeline is equipped with a filter screen and a flow meter. After long-term operation, the inner wall of the ammonia supply pipeline is prone to ash and scale. After the ash and scale fall off, it often causes the filter screen and flow meter to become blocked, affecting the ammonia supply flow, endangering the environmental protection equipment, and causing the equipment to fail to operate normally. Utility Model Content
[0003] The main purpose of this utility model is to provide a boiler denitrification ammonia supply system to solve the problem in the prior art where the inner wall of the ammonia supply pipeline is prone to ash and scale buildup, which often leads to clogging of the filter screen and flow meter after the ash and scale fall off.
[0004] To achieve the above objectives, this utility model provides a boiler denitrification ammonia supply system, including a liquid ammonia storage tank, a liquid ammonia evaporator connected to the liquid ammonia storage tank via a pipeline, an ammonia buffer tank connected to the liquid ammonia evaporator via a pipeline, an ammonia supply pipeline connected to the ammonia supply pipeline, and a filter screen and flow meter installed on the ammonia supply pipeline; the ammonia outlet at the top of the liquid ammonia storage tank is connected to point A on the ammonia supply pipeline via a purge pipe, and shut-off valves are installed on the purge pipe and on the ammonia supply pipeline at a position between point A and the ammonia buffer tank.
[0005] Furthermore, an ammonia-air mixer is connected to the ammonia supply pipeline.
[0006] Furthermore, the ammonia outlet at the top of the liquid ammonia storage tank is connected to a liquid ammonia tanker truck via an ammonia pipeline, and the liquid ammonia tanker truck is connected to the liquid ammonia inlet of the liquid ammonia storage tank via a liquid ammonia pipeline; an ammonia unloading compressor is installed on the ammonia pipeline.
[0007] Furthermore, a liquid ammonia supply pump is connected to the pipeline between the liquid ammonia storage tank and the liquid ammonia evaporator.
[0008] This invention utilizes high-pressure ammonia gas from the liquid ammonia storage tank to purge the filter screen and flow meter using a purge pipe. This removes the dirt and grime adhering to the filter screen and flow meter, preventing them from clogging the filter screen and flow meter, affecting the ammonia supply flow, endangering environmental protection equipment, and causing the equipment to malfunction. Attached Figure Description
[0009] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.
[0010] Figure 1This is a schematic diagram of the boiler denitrification and ammonia supply system in the embodiment.
[0011] In the diagram: 1. Liquid ammonia storage tank; 2. Shut-off valve; 3. Liquid ammonia evaporator; 4. Ammonia buffer tank; 5. Ammonia supply pipeline; 6. Filter screen; 7. Flow meter; 8. Purge pipe; 9. Ammonia unloading compressor; 10. Liquid ammonia tanker truck; 11. Ammonia-air mixer; 12. Liquid ammonia supply pump. Detailed Implementation
[0012] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0013] like Figure 1 As shown, according to an embodiment of the present invention, a boiler denitrification ammonia supply system is provided, including a liquid ammonia storage tank 1, a liquid ammonia evaporator 3 connected to the liquid ammonia storage tank 1 via a pipeline, an ammonia buffer tank 4 connected to the liquid ammonia evaporator 3 via a pipeline, an ammonia buffer tank 4 connected to an ammonia supply pipeline 5, a filter screen 6 and a flow meter 7 installed on the ammonia supply pipeline 5; the ammonia outlet at the top of the liquid ammonia storage tank 1 is connected to point A on the ammonia supply pipeline 5 via a purge pipe 8, and shut-off valves 2 are installed on the purge pipe 8 and on the ammonia supply pipeline 5 at points A and between points A and the ammonia buffer tank 4.
[0014] An ammonia-air mixer 11 is connected to the ammonia supply pipeline 5. The ammonia-air mixer 11 is used to adjust the concentration of ammonia gas.
[0015] The ammonia outlet at the top of the liquid ammonia storage tank 1 is connected to a liquid ammonia tanker truck 10 via an ammonia pipeline, and the liquid ammonia tanker truck 10 is connected to the liquid ammonia inlet of the liquid ammonia storage tank 1 via a liquid ammonia pipeline; an ammonia unloading compressor 9 is installed on the ammonia pipeline.
[0016] A liquid ammonia supply pump 12 is connected to the pipeline between the liquid ammonia storage tank 1 and the liquid ammonia evaporator 3.
[0017] In this embodiment, by setting up a purge pipe 8, the shut-off valve 2 on the purge pipe 8 can be opened, and the high-pressure ammonia gas in the liquid ammonia storage tank 1 is used to purge the filter screen and flow meter under high pressure. The ammonia pressure inside the ammonia supply pipeline 5 when supplying ammonia is 0.25-0.35 MPa, and the pressure of the high-pressure ammonia gas in the liquid ammonia storage tank 1 is 0.6-1.2 MPa, which is much greater than the ammonia pressure inside the ammonia supply pipeline 5 when supplying ammonia. This can blow off the dirt and grime adhering to the filter screen 6 and flow meter 7, preventing the dirt and grime from clogging the filter screen 6 and flow meter 7, affecting the ammonia supply flow, endangering the environmental protection equipment, and causing the equipment to malfunction.
[0018] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A boiler de-liquefied ammonia supply system comprising a boiler de-liquefied ammonia supply system comprising a liquid ammonia storage tank (1), the liquid ammonia storage tank (1) being connected with a liquid ammonia evaporator (3) through a pipeline, the liquid ammonia evaporator (3) being connected with an ammonia gas buffer tank (4) through a pipeline, the ammonia gas buffer tank (4) being connected with an ammonia supply pipeline (5), a filter screen (6) and a flow meter (7) being arranged on the ammonia supply pipeline (5); characterized in that, The ammonia gas outlet on the top of the liquid ammonia storage tank (1) is connected with A on the ammonia supply pipeline (5) through a purge pipe (8), and a shut-off valve (2) is arranged on the purge pipe (8) and the ammonia supply pipeline (5) between A and the ammonia gas buffer tank (4).
2. The boiler depleting ammonia system as claimed in claim 1, wherein, An ammonia-air mixer (11) is connected to the ammonia supply pipeline (5).
3. The boiler depleting ammonia system as claimed in claim 1, wherein, The ammonia gas outlet on the top of the liquid ammonia storage tank (1) is connected with a liquid ammonia tank truck (10) through an ammonia gas pipeline, the liquid ammonia tank truck (10) is connected with the liquid ammonia inlet of the liquid ammonia storage tank (1) through a liquid ammonia pipeline, and an ammonia unloading compressor (9) is arranged on the ammonia gas pipeline.
4. The boiler depleting ammonia system as claimed in claim 1, wherein, A liquid ammonia supply pump (12) is connected to the pipeline between the liquid ammonia storage tank (1) and the liquid ammonia evaporator (3).