Flue gas denitration heat dissipation device of gas internal combustion engine

Abstract

The utility model discloses a flue gas denitration radiating device of a gas internal combustion engine, which relates to the technical field of flue gas treatment, and comprises a base, a radiating pipe fixed on the base, a material supplementing pipe fixedly communicated with the radiating pipe, a position adjusting component arranged on the base, an SCR (Selective Catalytic Reduction) reactor arranged on the position adjusting component, the gas inlet end of the SCR reactor is fixedly communicated with a gas guide pipe, the gas outlet end of the SCR reactor is fixedly communicated with a tail gas discharge pipe, and a resistance thermometer is arranged at the top of the SCR reactor. The distance between the SCR reactor and the heat dissipation pipe can be adjusted through the position adjusting assembly, so that the SCR reactor drives the air guide pipe and the sealing piece on the air guide pipe to slide in the heat dissipation pipe, a worker checks the temperature of flue gas about to enter the SCR reactor through the resistance thermometer, the distance of the flue gas flowing through the heat dissipation pipe is reasonably adjusted, and the heat dissipation efficiency is improved. And when smoke is cooled by the heat dissipation assembly arranged outside the heat dissipation pipe in a sleeving mode and then flows into the air guide pipe, temperature control is more accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas treatment, in particular to a flue gas denitration and heat dissipation device for a gas internal combustion engine. Background Art

[0002] Gas internal combustion engines, due to their flexibility, high efficiency, and low emissions, can achieve cascade utilization of energy through the combined supply of cold, heat, and electricity. They are widely used in energy-intensive facilities such as municipalities, industrial parks, commercial real estate, buildings, hospitals, and schools. Gas generator sets are new generator sets developed to meet the world's environmental protection requirements and the new market environment. When the gas generator set is running, the flue gas emitted by the gas internal combustion engine needs to be denitrated. Selective catalytic reduction process technology (SCR denitration technology) is the current mainstream treatment technology. Its principle is to use reducing agents (such as NH3 and CO, etc.) on the catalyst surface to convert nitrogen oxides into harmless nitrogen through catalytic action, thereby achieving the purpose of reducing nitrogen oxide emissions.

[0003] In order to improve the effect of flue gas denitrification, it is necessary to control the temperature of the flue gas and the reducing agent entering the reactor. If the temperature of the flue gas just discharged is too high, a radiator is needed to cool it down. The path of the flue gas during the heat dissipation process is fixed. For flue gases with different initial temperatures, there is uncertainty in the temperature after cooling by the radiator, which will affect the sufficiency of the reaction in the reactor and thus affect the effect of flue gas denitrification. Utility Model Content

[0004] The purpose of the present application is to provide a flue gas denitrification heat dissipation device for a gas internal combustion engine, so as to solve the problem raised in the above background technology that the temperature of the flue gas just discharged is too high and a radiator is needed to cool it down. The path along which the flue gas circulates during the heat dissipation process is fixed. For flue gases with different initial temperatures, there is uncertainty in the temperature after being cooled by the radiator, which will affect the sufficiency of the reaction in the reactor and further affect the denitrification effect of the flue gas.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a denitration heat dissipation device for flue gas of a gas internal combustion engine, comprising a base, a heat dissipation pipe is fixed on the base, a feed pipe is fixedly connected to the heat dissipation pipe, a position adjustment component is arranged on the base, an SCR reactor is arranged on the position adjustment component, an air inlet end of the SCR reactor is fixedly connected to an air bleed pipe, an air outlet end of the SCR reactor is fixedly connected to an exhaust gas exhaust pipe, a resistance thermometer is arranged on the top of the SCR reactor, the resistance thermometer is used to detect the temperature of the flue gas inside the air bleed pipe, an insulation layer is fixedly sleeved on the outside of the air bleed pipe, a seal is fixedly sleeved on the outside of one end of the air bleed pipe away from the SCR reactor, the seal is slidably matched with the inner wall of the heat dissipation pipe, the position adjustment component is used to adjust the position of the seal in the heat dissipation pipe, a heat dissipation component is sleeved on the outside of the heat dissipation pipe, and the heat dissipation component is used to assist in cooling the flue gas inside the heat dissipation pipe.

[0006] Furthermore, a guide block is fixed to a side of the sealing member away from the SCR reactor, and the guide block is sleeved on the outside of the air duct.

[0007] Furthermore, a mounting plate is fixedly sleeved on the outside of one end of the heat dissipation pipe away from the SCR reactor, and a plurality of mounting holes are formed on the mounting plate.

[0008] Furthermore, the heat dissipation assembly includes a water inlet pipe and a water outlet pipe, a plurality of heat exchange pipes are fixedly connected between the water inlet pipe and the water outlet pipe, a plurality of heat exchange plates are fixedly sleeved on the outside of the plurality of heat exchange pipes, the plurality of heat exchange plates are arranged linearly, and the plurality of heat exchange plates are fixedly sleeved on the outside of the heat dissipation pipe, a first sealing block is fixedly fixed at one end of the water outlet pipe, a second sealing block is fixed at one end of the water inlet pipe, a water pump is connected to the other end of the water inlet pipe, a water supply pipe is fixedly connected to the water inlet of the water pump, and the water pump is fixedly installed on the base.

[0009] Furthermore, two supporting frames are fixed on the plurality of heat exchange plates, and a plurality of heat dissipation fans are fixedly installed inside the supporting frames.

[0010] Furthermore, the position adjustment component includes a rectangular frame plate, which is fixedly mounted on a base, a screw rod is rotatably connected between the left and right inner walls of the rectangular frame plate via a bearing, a support plate is threadedly connected to the screw rod, the support plate is slidably matched with the inner wall of the rectangular frame plate, the SCR reactor is fixedly mounted on the support plate, a drive motor is arranged on the right side of the rectangular frame plate, and the screw rod is driven by the drive motor.

[0011] In summary, the technical effects and advantages of the utility model are:

[0012] 1. In the utility model, the distance between the SCR reactor and the heat dissipation pipe can be adjusted by using the position adjustment component, so that the SCR reactor drives the air duct and the seal thereon to slide inside the heat dissipation pipe. The staff uses a resistance thermometer to check the temperature of the flue gas that is about to enter the SCR reactor, and reasonably adjusts the distance that the flue gas flows through the heat dissipation pipe, so that when the flue gas is cooled by the heat dissipation component mounted outside the heat dissipation pipe and flows into the inside of the air duct, the temperature control is more accurate. In this way, it can be ensured that the flue gas after cooling can react more fully when entering the SCR reactor, and the denitrification effect is better.

[0013] 2. In the utility model, a water pump is used to input cold water into the water inlet pipe, and the cold water is dispersed into a plurality of heat exchange tubes along the water inlet pipe. The heat dissipating tube conducts its own heat with the help of a plurality of heat exchange plates, so that the cold water flowing in the heat exchange tube can help the heat dissipating tube to cool down, thereby realizing the heat dissipation of the flue gas in the heat dissipating tube. The heated water is discharged along the water outlet pipe and can be supplied for daily use. With the help of a plurality of heat dissipating fans, the flow rate of the air between the plurality of heat exchange plates can be accelerated, so that the heat dissipation efficiency of the flue gas in the heat dissipating tube is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below.

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of a flue gas denitration and heat dissipation device for a gas internal combustion engine in an embodiment of the present application;

[0016] Figure 2 This is a position relationship diagram of the feed pipe, SCR reactor, air bleed pipe, and seal in the embodiment of the present application;

[0017] Figure 3 This is a schematic diagram of the structure of the heat dissipation assembly in an embodiment of the present application;

[0018] Figure 4 Schematic diagram of the structure of the position adjustment component in the embodiment of the present application.

[0019] In the figure: 1. base; 2. heat dissipation pipe; 3. feed pipe; 4. SCR reactor; 5. air duct; 6. exhaust gas discharge pipe; 7. resistance thermometer; 8. seal; 9. guide block; 10. mounting plate; 11. mounting hole; 12. water inlet pipe; 13. water outlet pipe; 14. heat exchange tube; 15. heat exchange plate; 16. first sealing block; 17. second sealing block; 18. water pump; 19. water pipe; 20. bearing frame; 21. cooling fan; 22. rectangular frame plate; 23. screw rod; 24. support plate; 25. drive motor. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] Example: Reference Figure 1-4 The denitration heat dissipation device for flue gas of a gas internal combustion engine shown in the figure comprises a base 1, a heat dissipation pipe 2 is fixed on the base 1, a feed pipe 3 is fixedly connected to the heat dissipation pipe 2, a position adjustment component is arranged on the base 1, an SCR reactor 4 is arranged on the position adjustment component, an air inlet end of the SCR reactor 4 is fixedly connected to an air bleed pipe 5, an air outlet end of the SCR reactor 4 is fixedly connected to an exhaust gas exhaust pipe 6, a resistance thermometer 7 is arranged on the top of the SCR reactor 4, and the resistance thermometer 7 is used to detect the temperature of the flue gas inside the air bleed pipe 5. The outer part of the ducting pipe 5 is fixedly sleeved with a heat preservation layer, and the outer part of the end of the ducting pipe 5 away from the SCR reactor 4 is fixedly sleeved with a seal 8, and the seal 8 is slidably matched with the inner wall of the heat dissipation pipe 2. The position adjustment component is used to adjust the position of the seal 8 in the heat dissipation pipe 2. The side of the seal 8 away from the SCR reactor 4 is fixed with a guide block 9, and the guide block 9 is sleeved on the outside of the ducting pipe 5. With the help of the guide block 9, it is more convenient for the seal 8 to enter and exit the heat dissipation pipe 2. The outer part of the heat dissipation pipe 2 is sleeved with a heat dissipation component, and the heat dissipation component is used for auxiliary cooling of the flue gas inside the heat dissipation pipe 2;

[0022] The position adjustment component can be used to adjust the distance between the SCR reactor 4 and the heat dissipation pipe 2, so that the SCR reactor 4 drives the air duct 5 and the seal 8 thereon to slide inside the heat dissipation pipe 2. The staff uses the resistance thermometer 7 to check the temperature of the flue gas that is about to enter the SCR reactor 4, and reasonably adjusts the distance that the flue gas flows through the heat dissipation pipe 2. When the flue gas is cooled by the heat dissipation component mounted on the outside of the heat dissipation pipe 2 and flows into the inside of the air duct 5, the temperature control is more accurate. In this way, it can be ensured that the cooled flue gas reacts more fully when entering the SCR reactor 4.

[0023] Among them, a mounting plate 10 is fixedly sleeved on the outside of one end of the heat dissipation pipe 2 away from the SCR reactor 4, and a plurality of mounting holes 11 are provided on the mounting plate 10. With the help of the plurality of mounting holes 11 provided on the mounting plate 10, the connection between the heat dissipation pipe 2 and the flue gas outlet of the gas internal combustion engine is more convenient.

[0024] The heat dissipation component includes a water inlet pipe 12 and a water outlet pipe 13, a plurality of heat exchange pipes 14 are fixedly connected between the water inlet pipe 12 and the water outlet pipe 13, a plurality of heat exchange fins 15 are fixedly sleeved on the outside of the plurality of heat exchange pipes 14, the plurality of heat exchange fins 15 are linearly arranged, and the plurality of heat exchange fins 15 are fixedly sleeved on the outside of the heat dissipation pipe 2, a first sealing block 16 is fixedly fixed at one end of the water outlet pipe 13, a second sealing block 17 is fixedly fixed at one end of the water inlet pipe 12, a water pump 18 is connected to the other end of the water inlet pipe 12, a water inlet of the water pump 18 is fixedly connected to a water delivery pipe 19, and the water pump 18 is fixedly installed on the base 1, two bearing frames 20 are fixedly installed on the plurality of heat exchange fins 15, and a plurality of heat dissipation fans 21 are fixedly installed inside the bearing frame 20;

[0025] A water pump 18 is used to input cold water into the water inlet pipe 12, and the cold water is dispersed into the multiple heat exchange tubes 14 along the water inlet pipe 12. The heat dissipation tube 2 conducts its own heat with the help of the multiple heat exchange plates 15, so that the cold water flowing in the heat exchange tube 14 can help the heat dissipation tube 2 to cool down, thereby realizing the heat dissipation of the flue gas in the heat dissipation tube 2. The heated water is discharged along the water outlet pipe 13 and can be supplied for daily use. With the help of multiple heat dissipation fans 21, the flow rate of air between the multiple heat exchange plates 15 can be accelerated, so that the heat dissipation efficiency of the flue gas in the heat dissipation tube 2 is higher.

[0026] The position adjustment component includes a rectangular frame plate 22, which is fixedly mounted on the base 1. A screw rod 23 is rotatably connected between the left and right inner walls of the rectangular frame plate 22 through a bearing. A support plate 24 is threadedly connected to the screw rod 23. The support plate 24 is slidably matched with the inner wall of the rectangular frame plate 22. The SCR reactor 4 is fixedly mounted on the support plate 24. A drive motor 25 is arranged on the right side of the rectangular frame plate 22. The screw rod 23 is driven by the drive motor 25.

[0027] The driving motor 25 is used to drive the screw rod 23 to rotate, and the screw rod 23 pulls the SCR reactor 4 on the support plate 24 to move in a screw transmission manner, so as to adjust the distance between the SCR reactor 4 and the heat dissipation pipe 2 .

[0028] Working principle of this utility model:

[0029] The mounting plate 10 is fixed at the exhaust port of the gas internal combustion engine so that the flue gas can enter the interior of the heat dissipation pipe 2. The water delivery pipe 19 is connected to the city water supply pipe. The water pump 18 is started to deliver cold water to the interior of the water inlet pipe 12. The cold water is dispersed through multiple heat exchange pipes 14. The flue gas flowing into the heat dissipation pipe 2 transfers the heat to the heat dissipation pipe 2. The heat dissipation pipe 2 disperses the heat with the help of multiple heat exchange plates 15. The cold water and the heat exchange plates 15 generate heat exchange, so that the heat exchange plates 15 cool down, thereby achieving the purpose of cooling the flue gas. At the same time, the cooling fan 21 is controlled to operate so that the cooling fan 21 speeds up the air flow rate between the multiple heat exchange plates 15, forcing the heat exchange plates 15 to dissipate heat faster, so that the flue gas cooling efficiency is improved. The heated water is gathered in the water outlet pipe 13 and then discharged along the water outlet pipe 13, which can be supplied for daily use.

[0030] The reducing agent is introduced into the flue gas along the feeding pipe 3 to mix the reducing agent with the flue gas. After the two are mixed, the reducing agent is heated up, and the temperature of the flue gas and the reducing agent that are about to enter the SCR reactor 4 is observed with the help of the resistance thermometer 7. If the temperature exceeds the preset value, the drive motor 25 can be controlled to drive the screw rod 23 to rotate forward, so that the SCR reactor 4 is away from the heat dissipation pipe 2. In this way, the distance that the flue gas flows through the heat dissipation pipe 2 before entering the air duct 5 is increased, and the heat dissipation component can be used to cool down better until the resistance thermometer 7 detects that the temperature of the flue gas that is about to enter the SCR reactor 4 is within a predetermined range, and the operation of the drive motor 25 is stopped. If the temperature is lower than the preset value, the drive motor 25 is controlled to drive the screw rod 23 to rotate in the opposite direction, so as to drive the SCR reactor 4 to approach the heat dissipation pipe 2 and shorten the distance that the flue gas flows through the heat dissipation pipe 2. In this way, the flue gas can be better reacted in the SCR reactor 4 and the denitrification effect of the flue gas can be improved.

[0031] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A flue gas denitration heat dissipation device for a gas internal combustion engine, comprising a base (1), characterized in that: A heat dissipation pipe (2) is fixed on the base (1), a feeding pipe (3) is fixedly connected to the heat dissipation pipe (2), a position adjustment component is arranged on the base (1), an SCR reactor (4) is arranged on the position adjustment component, an air inlet end of the SCR reactor (4) is fixedly connected to an air bleed pipe (5), an air outlet end of the SCR reactor (4) is fixedly connected to an exhaust gas discharge pipe (6), a resistance thermometer (7) is arranged on the top of the SCR reactor (4), the resistance thermometer (7) is used to detect the temperature of the flue gas inside the air bleed pipe (5), an insulation layer is fixedly sleeved on the outside of the air bleed pipe (5), a sealing member (8) is fixedly sleeved on the outside of one end of the air bleed pipe (5) away from the SCR reactor (4), the sealing member (8) is slidably matched with the inner wall of the heat dissipation pipe (2), the position adjustment component is used to adjust the position of the sealing member (8) in the heat dissipation pipe (2), the heat dissipation component is sleeved on the outside of the heat dissipation pipe (2), the heat dissipation component is used to assist in cooling the flue gas inside the heat dissipation pipe (2).

2. A flue gas denitration heat dissipation device for a gas internal combustion engine according to claim 1, characterized in that: A guide block (9) is fixed to the side of the sealing member (8) away from the SCR reactor (4), and the guide block (9) is sleeved on the outside of the air duct (5).

3. The denitration heat dissipation device for flue gas of a gas internal combustion engine according to claim 1, characterized in that: A mounting plate (10) is fixedly sleeved on the outside of one end of the heat dissipation pipe (2) away from the SCR reactor (4), and a plurality of mounting holes (11) are provided on the mounting plate (10).

4. The denitration heat dissipation device for flue gas of a gas internal combustion engine according to claim 1, characterized in that: The heat dissipation component comprises a water inlet pipe (12) and a water outlet pipe (13); a plurality of heat exchange pipes (14) are fixedly connected between the water inlet pipe (12) and the water outlet pipe (13); a plurality of heat exchange fins (15) are fixedly sleeved on the outside of the plurality of heat exchange pipes (14); the plurality of heat exchange fins (15) are arranged linearly, and the plurality of heat exchange fins (15) are fixedly sleeved on the outside of the heat dissipation pipe (2); a first sealing block (16) is fixedly connected to one end of the water outlet pipe (13); a second sealing block (17) is fixedly connected to one end of the water inlet pipe (12); a water pump (18) is connected to the other end of the water inlet pipe (12); a water delivery pipe (19) is fixedly connected to the water inlet of the water pump (18); and the water pump (18) is fixedly mounted on the base (1).

5. A flue gas denitration heat dissipation device for a gas internal combustion engine according to claim 4, characterized in that: Two supporting frames (20) are fixed on the plurality of heat exchange plates (15), and a plurality of heat dissipation fans (21) are fixedly installed inside the supporting frames (20).

6. The denitration heat dissipation device for flue gas of a gas internal combustion engine according to claim 1, characterized in that: The position adjustment assembly comprises a rectangular frame plate (22), the rectangular frame plate (22) being fixedly mounted on a base (1), a screw rod (23) being rotatably connected between left and right inner walls of the rectangular frame plate (22) via a bearing, a support plate (24) being threadedly connected to the screw rod (23), the support plate (24) being slidably matched with the inner wall of the rectangular frame plate (22), the SCR reactor (4) being fixedly mounted on the support plate (24), a drive motor (25) being arranged on the right side of the rectangular frame plate (22), and the screw rod (23) being driven by the drive motor (25).

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