Flue heat exchange device for carrying out raw water heat exchange by utilizing smoke temperature of thermal power plant
By designing a flue gas heat exchange device to heat water using high-temperature flue gas, the problem of unutilized waste heat from flue gas in thermal power plants was solved, achieving waste heat recovery and flue gas temperature reduction, thereby improving the economic efficiency and equipment lifespan of power plants.
Patent Information
- Application Number
- CN202520904987.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-09
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-05-09
AI Technical Summary
The heat energy carried by the high-temperature flue gas in thermal power plants is not fully utilized, resulting in energy waste, and the high temperature of the flue gas emissions affects the lifespan of the flue.
Design a flue heat exchange device that uses high-temperature flue gas to heat water, and recovers waste heat from the flue gas through an inlet chamber, an outlet chamber, a heat exchange cavity, and heat exchange tubes to heat the water and reduce the flue gas temperature.
This achieves effective utilization of flue gas waste heat, saves steam consumption, extends the service life of flue gas ducts, and improves the economic operating efficiency of generator sets.
Smart Images
Figure CN223924866U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to heat exchange technical field, specifically point to a kind of flue heat exchange device using thermal power plant smoke temperature to carry out raw water heat exchange. BACKGROUND
[0002] Thermal power generation is the process of converting chemical energy into heat energy by burning fossil fuels such as coal, natural gas or oil, and then converting heat energy into mechanical energy through steam turbines or gas turbines, and finally driving the generator to generate electricity. In the flue gas system of thermal power plants, high-temperature flue gas generated by fuel combustion first passes through the boiler heating surface to release part of the heat for generating steam, and then flows through the economizer, air preheater (air preheater) and other equipment in turn to further recover the heat in the flue gas for preheating boiler feedwater and combustion air to improve energy utilization efficiency. However, even after multiple stages of heat recovery, the final discharged flue gas temperature is still as high as about 150°C. This part of high-temperature flue gas carries a large amount of heat energy that has not been fully utilized and is directly discharged into the atmosphere, causing a huge waste of energy. SUMMARY
[0003] To solve the above problems, the utility model provides a flue heat exchange device for raw water heat exchange using thermal power plant smoke temperature.
[0004] The technical scheme adopted by the utility model is as follows: the utility model provides a flue heat exchange device for raw water heat exchange using thermal power plant smoke temperature, which comprises a heat exchange assembly, a heat exchange cavity is arranged inside the heat exchange assembly, a water inlet chamber is arranged on one side of the inside of the heat exchange assembly, a water outlet chamber is arranged on the other side of the inside of the heat exchange cavity, a smoke inlet is formed on one side of the upper end of the heat exchange cavity, a water outlet is formed on one side of the lower end of the heat exchange cavity, and a heat exchange pipe is sleeved on the side wall of the heat exchange cavity.
[0005] Further, one end of the water inlet pipe is connected to the outer wall of the water inlet chamber, the other end of the water inlet pipe is installed with the output end of the water pump, and the input end of the water pump is connected to the water source.
[0006] Further, a first valve is installed on the water inlet pipe.
[0007] Further, one end of the water outlet pipe is connected to the outer wall of the water outlet chamber, and the other end of the water outlet pipe is installed with the input end of the hot water tank.
[0008] Further, a second valve is installed on the water outlet pipe.
[0009] The utility model has the beneficial effects as follows by adopting the above structure:
[0010] It enables the water heating function of the flue gas waste heat water treatment workshop, saves steam consumption, reduces flue gas emission temperature and helps extend the service life of the flue, and realizes the economical operation of the thermal power plant generator unit. Attached Figure Description
[0011] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0012] Figure 1 This is a schematic diagram of a flue heat exchange device that utilizes the flue gas temperature of a thermal power plant for raw water heat exchange, according to the present invention.
[0013] Among them, 1. heat exchange component, 2. water inlet pipe, 3. water outlet pipe, 4. first valve, 5. second valve, 6. hot water tank, 7. heat exchange chamber, 8. water inlet chamber, 9. water outlet chamber, 10. flue gas inlet, 11. water outlet, 12. water pump, and 13. heat exchange tube. Detailed Implementation
[0014] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.
[0015] like Figure 1 As shown, this utility model proposes a flue heat exchange device for raw water heat exchange using flue gas temperature in a thermal power plant. It includes a heat exchange component 1, an internal heat exchange chamber 7, and an inlet chamber 8 on one side of the internal heat exchange component 1. One end of an inlet pipe 2 is connected to the outer wall of the inlet chamber 8, and a first valve 4 is installed on the inlet pipe 2. The output end of a water pump 12 is installed at the other end of the inlet pipe 2, and the input end of the water pump 12 is connected to an external water source. An outlet chamber 9 is located on the other side of the internal heat exchange chamber 7, and one end of an outlet pipe 3 is connected to the outer wall of the outlet chamber 9. The input end of a hot water tank 6 is installed at the other end of the outlet pipe 3. A flue gas inlet 10 is opened on one side of the upper end of the heat exchange chamber 7, and an outlet 11 is opened on one side of the lower end of the heat exchange chamber 7. A heat exchange tube 13 is sleeved on the side wall of the heat exchange chamber 7, and a second valve 5 is installed on the outlet pipe 3.
[0016] In use, first, the device is installed in the flue, the first valve 4 and the second valve 5 are opened, the water pump 12 is started, water is input into the water inlet chamber 8 through the water inlet pipe 2, then enters the heat exchange pipe 13 from the water inlet chamber 8, flue gas enters the heat exchange cavity 7 from the flue gas inlet 10, the water in the heat exchange pipe 13 is heated by using the high temperature of the flue gas, the water is heated and enters the water outlet chamber 9, then enters the hot water tank 6 through the water inlet pipe 2, the water generated by heat exchange in the heat exchange cavity 7 flows out through the water outlet 11, the above is the working process of the whole device, and the above steps can be repeated next time.
[0017] From the above implementation, the beneficial effects of the present application are as follows:
[0018] The flue gas waste heat is used to heat water for the water treatment workshop, steam consumption is saved, the flue gas emission temperature is reduced, the service life of the flue is prolonged, and the economic operation of the generator set of the thermal power plant is realized.
[0019] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A flue gas heat exchange device that utilizes the flue gas temperature of a thermal power plant for raw water heat exchange, characterized in that: The utility model provides a heat exchange component, the inside of heat exchange component (1) is equipped with heat exchange chamber (7), one side of the inside of heat exchange component (1) is equipped with water inlet chamber (8), the other side of the inside of heat exchange chamber (7) is equipped with water outlet chamber (9), the upper end of heat exchange chamber (7) one side is set up and goes out the water outlet (11) of smoke port (10), the lower end of heat exchange chamber (7) one side is set up and goes out the water outlet (11), and the lateral wall of heat exchange chamber (7) is sleeved with heat exchange pipe (13).
2. The flue heat exchanger according to claim 1, wherein the flue heat exchanger is characterized by: The outer wall of the water inlet chamber (8) is connected to one end of the water inlet pipe (2), the other end of the water inlet pipe (2) is connected to the output end of the water pump (12), and the input end of the water pump (12) is connected to a water source.
3. The flue heat exchanger according to claim 2, wherein the flue heat exchanger is characterized by: A first valve (4) is installed on the water inlet pipe (2).
4. The flue heat exchanger according to claim 3, wherein: The outer wall of the water outlet chamber (9) is connected to one end of the water outlet pipe (3), and the other end of the water outlet pipe (3) is connected to the input end of the hot water tank (6).
5. The flue heat exchanger according to claim 4, wherein: the flue heat exchanger is characterized by comprising: a plurality of heat exchange pipes arranged in parallel and extending in the direction of the flue gas flow; and a plurality of heat exchange fins arranged on the outer surface of the heat exchange pipes. A second valve (5) is installed on the water outlet pipe (3).