High-efficiency flue gas denitration device of a combustion engine heat and power system

By installing cooling pipes and cooling components in the gas turbine cogeneration system to reduce the flue gas temperature, and combining this with a baffle to prevent particulate matter from floating, the problems of denitrification liquid decomposition and equipment corrosion caused by lack of pre-cooling were solved, achieving efficient and stable flue gas denitrification, and reducing operating costs and treatment difficulty.

CN224506752UActive Publication Date: 2026-07-17HUANENG (QINGYUAN) GAS TURBINE THERMAL POWER CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
HUANENG (QINGYUAN) GAS TURBINE THERMAL POWER CO LTD
Filing Date
2025-06-24
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

The lack of pre-cooling treatment for flue gas in existing gas turbine cogeneration systems leads to accelerated decomposition of oxidant in denitrification liquid, decreased oxidation and absorption efficiency, severe equipment corrosion, increased operating costs, and affects the form of nitrogen oxides and the difficulty of subsequent treatment.

Method used

A high-efficiency flue gas denitrification device for a gas turbine cogeneration system was designed. The device reduces the flue gas temperature by setting up cooling pipes and cooling components, prevents particulate matter from floating by baffles, ensures the cleanliness of the denitrification liquid, and uses atomizing nozzles to spray the coolant to cool it down, prevent equipment corrosion and reduce oxidant consumption.

Benefits of technology

It effectively reduces flue gas temperature, maintains a stable oxidant supply, improves denitrification efficiency, reduces equipment corrosion, lowers operating costs, simplifies subsequent processing procedures, and ensures stable operation and cleanliness of the denitrification process.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN224506752U_ABST
    Figure CN224506752U_ABST
Patent Text Reader

Abstract

The utility model relates to the technical field of flue gas denitration device, concretely relates to a kind of high-efficiency flue gas denitration device of gas turbine cogeneration system, including box, the inner bottom of box is provided with denitration liquid, the outer wall one side of box is fixedly connected with air inlet pipe, the air inlet pipe can be used to pass into the denitration liquid in the gas to be denitration, the one end fixedly connected with cooling pipe of air inlet pipe into box inside, the inner wall of cooling pipe and box is fixedly connected, the cooling pipe is jointly constituted by multiple U-shaped tubes and is internally connected, the upper end of cooling tube in the inside of box is provided with cooling assembly, the cooling assembly is used to reduce the flue gas temperature in cooling tube inside, the one end fixedly connected with liquid inlet pipe of cooling tube away from air inlet pipe, the lower end of liquid inlet pipe is dipped into denitration liquid.Just compared with prior art, the present application solves the problem that a series of adverse consequences caused by not precooling flue gas in prior art.
Need to check novelty before this filing date? Find Prior Art

Claims

1. A high-efficiency flue gas denitrification device for a gas turbine cogeneration system, characterized in that: The device includes a housing (1), with a denitrification liquid (16) disposed at the bottom of the housing (1). An air inlet pipe (2) is fixedly connected to one side of the outer wall of the housing (1). The air inlet pipe (2) can be used to introduce the gas to be denitrified into the denitrification liquid (16). A cooling pipe (8) is fixedly connected to one end of the air inlet pipe (2) that extends into the housing (1). The cooling pipe (8) is fixedly connected to the inner wall of the housing (1). The cooling pipe (8) is composed of multiple U-shaped pipes that are interconnected internally. A cooling assembly is disposed inside the housing (1) at the upper end of the cooling pipe (8). The cooling assembly is used to reduce the flue gas temperature inside the cooling pipe (8). A liquid inlet pipe (10) is fixedly connected to one end of the cooling pipe (8) away from the air inlet pipe (2). The lower end of the liquid inlet pipe (10) extends into the denitrification liquid (16).

2. The high-efficiency flue gas denitration device of a combined cycle power plant according to claim 1, characterized in that: A guide rod (12) is fixedly connected inside the cooling pipe (8). The guide rod (12) has a spiral design, and the outermost side of the outer wall of the guide rod (12) is fixedly connected to the inner wall of the cooling pipe (8).

3. The high-efficiency flue gas denitration device of a combined cycle power plant according to claim 1, characterized in that: The outer wall of the cooling pipe (8) is fixedly connected with a plurality of heat dissipation rods (11) at uniform intervals, and the heat dissipation rods (11) are conical.

4. The high-efficiency flue gas denitration device of a combined cycle power plant according to claim 1, characterized in that: The lower end of the inner part of the box (1) is fixedly connected to a fixed frame (13) in the denitrification liquid (16). A baffle (9) is fixedly connected inside the fixed frame (13). The baffle (9) is made of metal material. The lower end of the liquid inlet pipe (10) extends through the baffle (9) to the lower end of the baffle (9).

5. The high-efficiency flue gas denitration device of a combined cycle power plant according to claim 1, characterized in that: The cooling assembly includes a ring pipe (6) disposed at the upper end of the cooling pipe (8). The ring pipe (6) is square. Multiple atomizing nozzles (7) are fixedly connected at even intervals at the lower end of the ring pipe (6). The output end of the atomizing nozzles (7) faces the cooling pipe (8). A liquid inlet pipe (14) is fixedly connected to the side of the housing (1) away from the air inlet pipe (2). One end of the liquid inlet pipe (14) extends into the ring pipe (6) and is connected to the ring pipe (6). Multiple fixing blocks (15) are fixedly connected at even intervals at the upper end of the inner wall of the housing (1). One end of the fixing block (15) is fixedly connected to the ring pipe (6).

6. The high-efficiency flue gas denitration device of a combined cycle power plant according to claim 1, characterized in that: The upper end of the box body (1) is provided with a box cover (3), and the lower end of the box cover (3) and the upper end of the box body (1) are both fixedly connected with connecting plates (19). A sealing gasket is provided between the two connecting plates (19) and they are connected by bolts (20).

7. The high-efficiency flue gas denitration device of a combined cycle power plant according to claim 6, characterized in that: An exhaust pipe (4) is fixedly connected to one side of the upper middle part of the box cover (3), and the exhaust pipe (4) is connected to the interior of the box body (1).

8. The high-efficiency flue gas denitration device of a combined cycle power plant according to claim 1, characterized in that: A drain pipe (17) is fixedly connected to the middle of the lower end of the box (1), and a solenoid valve (18) is installed on the drain pipe (17).

9. A high-efficiency flue gas denitrification device for a gas turbine cogeneration system according to claim 1, characterized in that: An observation window (5) is installed in the middle of the front end face of the box (1), and the observation window (5) is made of transparent resin material.

10. The high-efficiency flue gas denitration device of a combined cycle power plant according to claim 1, characterized in that: Support feet are provided at the four corners of the lower end of the box (1), and the support feet are threadedly connected to the box (1).