Wet-type condensed flue gas desulfurization and denitrification system for boiler

Abstract

The invention discloses a boiler wet-type condensed flue gas desulfurization and denitrification system, which belongs to the technical field of waste gas treatment, and comprises a combustion bin, a heating device is arranged at the bottom of the combustion bin, a heating bin is fixedly connected above the combustion bin, and the left side of the combustion bin is fixedly communicated with flue gas treatment equipment; the flue gas treatment equipment comprises an inner pipeline, a top pipeline is arranged at the top of the inner pipeline, the bottom, the front side face and the rear side face of the inner pipeline are wrapped with outer pipelines, the right ends of the outer pipelines fixedly communicate with the top of the combustion bin, and a bent pipe fixedly communicates with the bottom of the left side of each outer pipeline. The condensation efficiency of the adsorption liquid is improved through multiple times of condensation, the waste heat of high-temperature flue gas is subjected to multi-layer recovery, the heat recovery efficiency of the high-temperature flue gas is improved, the energy consumption required for heating water by the boiler can be reduced, and the energy-saving and environment-friendly boiler has the characteristics of energy conservation and environmental protection.

Description

Technical Field

[0001] The invention relates to the technical field of waste gas treatment, and in particular to a boiler wet condensation flue gas desulfurization and denitrification system. Background Art

[0002] Flue gas desulfurization and denitrification technology is a boiler flue gas purification technology used in the chemical industry, mainly used to remove nitrogen oxides (NO x ) and sulfur oxides (SO x ). These pollutants are one of the main sources of air pollution, so the application of this technology has many benefits for environmental air purification.

[0003] The effect of alkaline solution in exhaust gas denitrification is mainly reflected in its ability to chemically react with sulfur dioxide (SO2) and nitrogen oxides (NOx) in flue gas, thereby achieving the purpose of reducing the emission of these pollutants. As a desulfurizer, alkaline solution can effectively remove sulfur dioxide (SO2) in exhaust gas. In practical applications, for example, the desulfurization efficiency of sodium bicarbonate solution can reach more than 98%.

[0004] The existing boiler wet condensing flue gas desulfurization and denitrification equipment has a low efficiency in recovering waste heat from high-temperature flue gas, which leads to increased energy consumption in boiler use and a large consumption of water resources in the flue gas desulfurization and denitrification process. Therefore, a boiler wet condensing flue gas desulfurization and denitrification system is needed. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a boiler wet condensing flue gas desulfurization and denitrification system.

[0006] The technical solution of the present invention is: a boiler wet condensing flue gas desulfurization and denitrification system, comprising a combustion chamber, a heating device is provided at the bottom of the combustion chamber, a heating chamber is fixedly connected above the combustion chamber, and a flue gas treatment device is fixedly connected to the left side of the combustion chamber;

[0007] The flue gas treatment equipment includes an inner pipe, the top of the inner pipe is provided with a top pipe, the bottom, front side and rear side of the inner pipe are wrapped with an outer pipe, the right end of the outer pipe is fixedly connected to the top of the combustion chamber, the bottom of the left side of the outer pipe is fixedly connected with a bent pipe, the right end of the bent pipe passes through the outer pipe and is fixedly connected to the inside of the inner pipe, and the inner pipe and the outer pipe are fixedly connected by a short rod.

[0008] Furthermore, the heating device includes a gas disc, the outer side of the gas disc is fixedly connected to the inner wall of the combustion chamber, a gas chamber is arranged inside the gas disc, a plurality of gas nozzles are fixedly connected to the top of the gas disc, the plurality of gas nozzles are communicated with the inside of the gas chamber, a nozzle through-pipe is fixedly connected in the gas chamber, the bottom of the nozzle through-pipe is communicated with the lower space of the gas disc, the top of the nozzle through-pipe is communicated with the upper space of the gas disc, a gas interface is fixedly connected to the bottom of the gas disc, and an electric A sub-igniter, a gas injection disk is provided at the bottom of the gas disk, an air chamber is provided inside the gas injection disk, an interface tube is fixedly connected inside the gas injection disk, the lower end of the gas interface passes through from below the interface tube, a plurality of air nozzles are provided on the top of the gas injection disk, the lower ends of the plurality of air nozzles are all connected to the air chamber, the upper ends of the plurality of air nozzles are inserted into the plurality of nozzle tubes one by one, the lower end of the gas injection disk is fixedly connected to the gas injection tube, a hair dryer is fixedly connected to the side wall of the combustion chamber, and the air outlet of the hair dryer is fixedly connected to the gas injection tube.

[0009] Description: Connect the gas pipeline to the outside through the gas interface, heat the heating chamber through gas combustion, and improve the combustion efficiency of the gas through the gas injection plate.

[0010] Furthermore, the heating device includes a coal ash bin, the top of which is fixedly connected to the combustion bin, an ash filter is provided between the coal ash bin and the combustion bin, a coal filling port is provided on the front side of the combustion bin, the front side of the combustion bin is fixedly connected to an air supply pipe, the end of the air supply pipe is fixedly connected to a blower, and the blower is fixedly connected to the side wall of the combustion bin.

[0011] Description: By using coal as the combustion raw material and increasing the oxygen content in the air in the combustion chamber through the air supply pipe, the efficiency of coal combustion is improved.

[0012] Furthermore, a nozzle is fixedly connected to the lower right side of the top pipe, an injection pipe is fixedly connected to the top left side of the top pipe, the top of the injection pipe is fixedly connected to an adsorption liquid tank, a suction pump is provided in the adsorption liquid tank, and the liquid outlet of the suction pump is fixedly connected to the injection pipe.

[0013] Description: The adsorption liquid is sprayed through the nozzle, and the adsorption liquid reacts with the flue gas to desulfurize and denitrify the flue gas. The adsorption liquid evaporates under the action of the high-temperature flue gas, exchanges heat with the adsorption liquid in the top pipe, and then condenses and is discharged through the inner pipe.

[0014] Furthermore, the left end of the inner pipe is fixedly connected to a sedimentation pipe, the bottom of the sedimentation pipe is fixedly connected to a liquid accumulation pipe, and the lower end of the liquid accumulation pipe is provided with a drain valve.

[0015] Note: After the mixture of flue gas and condensed water flows into the settling pipe, the condensate flows into the liquid accumulation pipe, and the flue gas is discharged through the top of the settling pipe.

[0016] Furthermore, a transverse pipe is fixedly connected to the top of the settling pipe, the right end of the transverse pipe is wound around the outer wall of the adsorption liquid bin, and the end of the transverse pipe is fixedly connected to a vertical smoke exhaust pipe.

[0017] Description: The flue gas in the settling tube and the adsorption liquid in the adsorption liquid tank are heat exchanged through the cross pipe, which further improves the waste heat recovery of the flue gas and can further condense the adsorption liquid vapor in the flue gas.

[0018] Furthermore, a preheating tube is wrapped around the outside of the outer pipe, and the preheating tube is fixedly connected to the outer pipe by a short rod 2. The upper left end of the preheating tube is fixedly connected to a liquid inlet interface, and the upper right end of the preheating tube is fixedly connected to a liquid supply tube, and the liquid supply tube 1 is fixedly connected to the heating chamber.

[0019] Description: The cold water entering the heating chamber is preheated through the preheating pipe, and the heat outside the external pipe is recovered to improve the heating efficiency of the heating chamber.

[0020] Furthermore, a temperature sensor 1 is provided at the left end of the inner pipe, and a temperature display 1 is fixedly connected to the outer wall of the combustion chamber, and the temperature display 1 is electrically connected to the temperature sensor 1.

[0021] Note: Check the temperature of the inner pipe through the temperature display 1, and then adjust the speed of the adsorption liquid spraying into the inner pipe.

[0022] Furthermore, a heating pipe is fixedly connected to the top of the heating chamber, a second temperature sensor is fixedly connected to the interior of the heating chamber, a second temperature display is fixedly connected to the outer wall of the heating chamber, and the second temperature sensor is electrically connected to the second temperature display.

[0023] Note: Temperature sensor 2 is used to observe the temperature of the water in the heating chamber.

[0024] Furthermore, a pressure detection gauge for monitoring the internal air pressure of the heating chamber is fixedly connected to the top of the heating chamber.

[0025] Note: Monitor the steam pressure in the heating chamber through the pressure detection gauge.

[0026] The beneficial effects of the present invention are:

[0027] (1) The present invention uses an adsorption liquid to absorb O2, HS gas in high-temperature flue gas and nitrogen oxides NO in exhaust gas. xDesulfurization and denitrification treatment is carried out, and multiple condensation improves the condensation efficiency of the adsorption liquid, and also improves the effect of flue gas desulfurization and denitrification. Through multi-layer recovery of the waste heat of high-temperature flue gas, the heat recovery efficiency of high-temperature flue gas is improved, and the energy consumption required for boiler heating water can be reduced, which has the characteristics of energy saving and environmental protection.

[0028] (2) The present invention has a structure with two sets of heating devices, which can use both gas and traditional coal as fuel, and can meet the boiler heating needs in different places. The present invention mixes the adsorption liquid and flue gas evenly during flue gas desulfurization and denitrification, thereby improving the desulfurization and denitrification effect of the adsorption liquid, consuming less water resources, and is conducive to saving water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the present invention.

[0030] Figure 2 It is a structural schematic diagram of the flue gas treatment equipment of the present invention.

[0031] Figure 3 It is a cross-sectional view of the flue gas treatment equipment of the present invention.

[0032] Figure 4 It is a schematic diagram of the structure of the heating device in Example 2 of the present invention.

[0033] Figure 5 It is a schematic diagram of the structure of the heating device in Example 1 of the present invention.

[0034] Figure 6 It is a cross-sectional view of the gas tray of the present invention.

[0035] Figure 7 It is a cross-sectional view of the gas injection disk of the present invention.

[0036] Among them, 1-combustion chamber, 2-heating device, 3-heating chamber, 4-smoke treatment equipment, 41-inner pipe, 42-top pipe, 43-outer pipe, 44-elbow pipe, 45-short rod one, 21-gas plate, 211-gas chamber, 212-gas nozzle, 213-nozzle pipe, 214-gas interface, 215-electronic igniter, 22-gas injection plate, 221-air chamber, 222-interface pipe, 223-air nozzle, 224-gas injection pipe, 23-blower, 24-coal ash bin , 25-coal adding port, 26-air supply pipe, 27-air supply fan, 421-nozzle, 422-liquid injection pipe, 423-adsorption liquid bin, 424-liquid suction pump, 5-sedimentation pipe, 6-liquid accumulation pipe, 61-drain valve, 51-horizontal pipe, 52-vertical smoke exhaust pipe, 7-preheating pipe, 71-short rod two, 72-liquid inlet interface, 73-liquid supply pipe, 411-temperature sensor one, 412-temperature display one, 31-heating pipe, 32-temperature sensor two, 33-temperature display two, 34-pressure detection gauge. DETAILED DESCRIPTION

[0037] Embodiment 1:

[0038] like Figure 1 As shown, a boiler wet condensing flue gas desulfurization and denitrification system comprises a combustion chamber 1, a heating device 2 is provided at the bottom of the combustion chamber 1, a heating chamber 3 is fixedly connected to the top of the combustion chamber 1, and a flue gas treatment device 4 is fixedly connected to the left side of the combustion chamber 1;

[0039] like Figure 2 , Figure 3 As shown, the flue gas treatment equipment 4 includes an inner pipe 41, a top pipe 42 is provided on the top of the inner pipe 41, the bottom, front side and rear side of the inner pipe 41 are wrapped with an outer pipe 43, the right end of the outer pipe 43 is fixedly connected to the top of the combustion chamber 1, and the bottom of the left side of the outer pipe 43 is fixedly connected to a bend pipe 44, the right end of the bend pipe 44 passes through the outer pipe 43 and is fixedly connected to the inside of the inner pipe 41, and the inner pipe 41 and the outer pipe 43 are fixedly connected by a short rod 45.

[0040] like Figure 5 , Figure 6 , Figure 7As shown, the heating device 2 includes a gas disc 21, the outer side of the gas disc 21 is fixedly connected to the inner wall of the combustion chamber 1, a gas chamber 211 is provided inside the gas disc 21, a plurality of gas nozzles 212 are fixedly connected to the top of the gas disc 21, and the plurality of gas nozzles 212 are all connected to the inside of the gas chamber 211, a nozzle through-tube 213 is fixedly connected to the inside of the gas chamber 211, the bottom of the nozzle through-tube 213 is connected to the lower space of the gas disc 21, the top of the nozzle through-tube 213 is connected to the upper space of the gas disc 21, a gas interface 214 is fixedly connected to the bottom of the gas disc 21, and an electronic igniter 215 is fixedly connected to the center of the gas disc A gas injection disk 22 is provided at the bottom of the gas disk 21, and an air chamber 221 is provided inside the gas injection disk 22. An interface pipe 222 is fixedly connected inside the gas injection disk 22, and the lower end of the gas interface 214 passes through the bottom of the interface pipe 222. A plurality of air nozzles 223 are provided on the top of the gas injection disk 22, and the lower ends of the plurality of air nozzles 223 are all connected to the air chamber 221. The upper ends of the plurality of air nozzles 223 are inserted into the plurality of nozzle pipes 213 one by one. The lower end of the gas injection disk 22 is fixedly connected to the gas injection pipe 224, and a hair dryer 23 is fixedly connected to the side wall of the combustion chamber 1, and the air outlet of the hair dryer 23 is fixedly connected to the gas injection pipe 224.

[0041] An external gas pipeline is connected via the gas interface 214 , the heating chamber 3 is heated by gas combustion, and the gas combustion efficiency is improved via the gas injection disk 22 .

[0042] A nozzle 421 is fixedly connected to the lower right side of the top pipe 42, an injection pipe 422 is fixedly connected to the top left side of the top pipe 42, and an adsorption liquid tank 423 is fixedly connected to the top of the injection pipe 422. A suction pump 424 is provided in the adsorption liquid tank 423, and the liquid outlet of the suction pump 424 is fixedly connected to the injection pipe 422.

[0043] The adsorption liquid is sprayed through the nozzle 421, and the flue gas is desulfurized and denitrified by the reaction of the adsorption liquid with the flue gas. The adsorption liquid evaporates under the action of the high-temperature flue gas, exchanges heat with the adsorption liquid in the top pipe 42, and then condenses and is discharged through the inner pipe 41.

[0044] Embodiment 2:

[0045] The difference between this embodiment and embodiment 1 is that Figure 4 As shown, the heating device 2 includes a coal ash bin 24, the top of which is fixedly connected to the combustion bin 1, an ash filter 241 is provided between the coal ash bin 24 and the combustion bin 1, a coal adding port 25 is provided on the front side of the combustion bin 1, an air supply pipe 26 is fixedly connected to the front side of the combustion bin 1, an end of the air supply pipe 26 is fixedly connected to a blower 27, and the blower 27 is fixedly connected to the side wall of the combustion bin 1.

[0046] By using coal as the combustion raw material, the oxygen content in the air of the combustion chamber is increased through the air supply pipe 26, thereby improving the efficiency of coal combustion. Compared with the structure of the heating device 2 in Example 1, this embodiment provides a heating device 2 using coal as fuel, and the two heating methods can be selected according to actual production.

[0047] Embodiment 3:

[0048] The difference between this embodiment and embodiment 1 is that the left end of the inner pipe 41 is fixedly connected to a sedimentation pipe 5 , the bottom of the sedimentation pipe 5 is fixedly connected to a liquid collection pipe 6 , and a drain valve 61 is provided at the lower end of the liquid collection pipe 6 .

[0049] Compared with Example 1, in this embodiment, after the mixture of flue gas and condensed water flows into the settling pipe 5, the condensate flows into the liquid collection pipe 6, and the flue gas is discharged through the top of the settling pipe 5, which is more conducive to the collection of the condensate.

[0050] Embodiment 4:

[0051] The difference between this embodiment and embodiment 3 is that a transverse pipe 51 is fixedly connected to the top of the settling pipe 5, the right end of the transverse pipe 51 is wrapped around the outer wall of the adsorption liquid bin 423, and the end of the transverse pipe 51 is fixedly connected to a vertical smoke exhaust pipe 52.

[0052] Compared with Example 3, this embodiment uses the transverse pipe 51 to perform heat exchange between the flue gas in the settling pipe 5 and the adsorption liquid in the adsorption liquid tank 423, thereby further improving the waste heat recovery of the flue gas and further condensing the adsorption liquid vapor in the flue gas.

[0053] Embodiment 5:

[0054] The difference between this embodiment and embodiment 4 is that the outer side of the outer pipe 43 is wrapped with a preheating pipe 7, the preheating pipe 7 and the outer pipe 43 are fixedly connected by a short rod 71, the upper left end of the preheating pipe 7 is fixedly connected to a liquid inlet interface 72, the upper right end of the preheating pipe 7 is fixedly connected to a liquid supply pipe 73, and the liquid supply pipe 73 is fixedly connected to the heating chamber 3.

[0055] Compared with Example 4, this embodiment preheats the cold water entering the heating chamber 3 through the preheating pipe 7, recovers the heat outside the external pipe 43, and improves the heating efficiency of the heating chamber 3.

[0056] Embodiment 6:

[0057] The difference between this embodiment and embodiment 5 is that a temperature sensor 411 is provided at the left end of the inner pipe 41, a temperature display 412 is fixedly connected to the outer wall of the combustion chamber 1, and the temperature display 412 is electrically connected to the temperature sensor 411.

[0058] Compared with Example 5, in this embodiment, the temperature of the inner pipe is checked through a temperature display 411 , and the speed of the adsorption liquid spraying into the inner pipe 41 is adjusted accordingly.

[0059] Embodiment 7:

[0060] The difference between this embodiment and embodiment 6 is that a heating pipe 31 is fixedly connected to the top of the heating chamber 3, a temperature sensor 32 is fixedly connected to the interior of the heating chamber 3, a temperature display 33 is fixedly connected to the outer wall of the heating chamber 3, and the temperature sensor 32 is electrically connected to the temperature display 33.

[0061] Compared with Example 6, this embodiment facilitates observation of the temperature of water in the heating chamber 3 by using the second temperature sensor 32 .

[0062] Embodiment 8:

[0063] The difference between this embodiment and embodiment 7 is that a pressure detection gauge 34 for monitoring the internal air pressure of the heating chamber 3 is fixedly connected to the top of the heating chamber 3 .

[0064] Compared with Example 7, this embodiment monitors the steam pressure in the heating chamber 3 through the pressure detection gauge 34.

[0065] The working method of the above-mentioned embodiment 8 comprises the following steps:

[0066] S1, after the heating chamber 3 is heated by the heating device 2, high-temperature flue gas is generated in the combustion chamber, and the high-temperature flue gas enters from the right end of the outer pipe 43, then enters the elbow 44 from the left side of the outer pipe 43, and then enters the right end of the inner pipe 41 through the elbow 44;

[0067] S2, spraying the adsorption liquid into the inner pipe 41 through the nozzle 421 to mix the adsorption liquid with the high-temperature flue gas. After the adsorption liquid reacts with the sulfur-containing substances and nitrogen oxides in the high-temperature flue gas, heat exchange is performed with the adsorption liquid in the top pipe 42 at the top of the inner pipe 41, so that the adsorption liquid vapor in the inner pipe 41 is condensed, and then discharged into the settling pipe 5 along the inner pipe 41. The outer wall of the outer pipe 43 performs heat exchange with the water in the preheating pipe 7. After the water in the preheating pipe 7 is preheated, the water in the preheating pipe 7 is discharged into the heating chamber 3 through the liquid supply pipe 73 for heating;

[0068] S3. The condensate entering the settling pipe 5 flows into the liquid accumulation pipe 6 for collection and is discharged through the drain valve 61. The flue gas containing a small amount of adsorption liquid vapor exchanges heat with the adsorption liquid in the adsorption liquid tank 423 through the horizontal pipe 51, so that the residual adsorption liquid vapor in the flue gas is condensed and flows back into the liquid accumulation pipe 6. Finally, the flue gas after low-temperature treatment is discharged through the vertical exhaust pipe 52.

[0069] The electronic igniter 215, hair dryer 23, air blower 27, suction pump 424, drain valve 61, temperature sensor 411, temperature display 412, temperature sensor 32, temperature display 33, and pressure gauge 34 used in the above embodiments are all commercially available products. As long as the functions of the present invention can be achieved, those skilled in the art can choose to use them according to common sense, and no special limitation is made here.

Claims

1. A boiler wet condensing flue gas desulfurization and denitrification system, characterized in that: It comprises a combustion chamber (1), a heating device (2) is provided at the bottom of the combustion chamber (1), a heating chamber (3) is fixedly connected to the top of the combustion chamber (1), and a smoke treatment device (4) is fixedly connected to the left side of the combustion chamber (1); The flue gas treatment equipment (4) comprises an inner pipe (41), the top of the inner pipe (41) is provided with a top pipe (42), the bottom, front side and rear side of the inner pipe (41) are wrapped with an outer pipe (43), the right end of the outer pipe (43) is fixedly connected to the top of the combustion chamber (1), the bottom of the left side of the outer pipe (43) is fixedly connected to a bent pipe (44), the right end of the bent pipe (44) passes through the outer pipe (43) and is fixedly connected to the inside of the inner pipe (41), and the inner pipe (41) and the outer pipe (43) are fixedly connected by a short rod (45).

2. A boiler wet condensing flue gas desulfurization and denitrification system according to claim 1, characterized in that: The heating device (2) comprises a gas disk (21), the outer side of the gas disk (21) is fixedly connected to the inner wall of the combustion chamber (1), a gas chamber (211) is provided inside the gas disk (21), a plurality of gas nozzles (212) are fixedly connected to the top of the gas disk (21), the plurality of gas nozzles (212) are all connected to the inside of the gas chamber (211), a nozzle through pipe (213) is fixedly connected to the inside of the gas chamber (211), the bottom of the nozzle through pipe (213) is connected to the space below the gas disk (21), the top of the nozzle through pipe (213) is connected to the space above the gas disk (21), a gas interface (214) is fixedly connected to the bottom of the gas disk (21), an electronic igniter (215) is fixedly connected to the center of the gas disk, and the A gas injection disk (22) is provided at the bottom of the gas disk (21), an air chamber (221) is provided inside the gas injection disk (22), an interface tube (222) is fixedly connected inside the gas injection disk (22), the lower end of the gas interface (214) passes through the bottom of the interface tube (222), a plurality of air nozzles (223) are provided at the top of the gas injection disk (22), the lower ends of the plurality of air nozzles (223) are all connected to the air chamber (221), the upper ends of the plurality of air nozzles (223) are inserted into the plurality of nozzle tubes (213) in a one-to-one correspondence, the lower end of the gas injection disk (22) is fixedly connected to the gas injection tube (224), the side wall of the combustion chamber (1) is fixedly connected to a blower (23), and the air outlet of the blower (23) is fixedly connected to the gas injection tube (224).

3. A boiler wet condensing flue gas desulfurization and denitrification system according to claim 1, characterized in that: The heating device (2) comprises a coal ash bin (24), the top of the coal ash bin (24) is fixedly connected to the combustion bin (1), an ash filter (241) is provided between the coal ash bin (24) and the combustion bin (1), a coal feeding port (25) is provided on the front side of the combustion bin (1), an air supply pipe (26) is fixedly connected to the front side of the combustion bin (1), an end of the air supply pipe (26) is fixedly connected to a blower (27), and the blower (27) is fixedly connected to the side wall of the combustion bin (1).

4. A boiler wet condensing flue gas desulfurization and denitrification system according to claim 1, characterized in that: A nozzle (421) is fixedly connected to the lower right side of the top pipe (42), a liquid injection pipe (422) is fixedly connected to the top left side of the top pipe (42), and an adsorption liquid tank (423) is fixedly connected to the top of the liquid injection pipe (422). A liquid suction pump (424) is provided in the adsorption liquid tank (423), and a liquid outlet of the liquid suction pump (424) is fixedly connected to the liquid injection pipe (422).

5. A boiler wet condensing flue gas desulfurization and denitrification system as claimed in claim 4, characterized in that: The left end of the inner pipe (41) is fixedly connected to a sedimentation pipe (5), the bottom of the sedimentation pipe (5) is fixedly connected to a liquid collection pipe (6), and the lower end of the liquid collection pipe (6) is provided with a liquid discharge valve (61).

6. A boiler wet condensing flue gas desulfurization and denitrification system as claimed in claim 5, characterized in that: The top of the sedimentation pipe (5) is fixedly connected to a transverse pipe (51), the right end of the transverse pipe (51) is wound around the outer wall of the adsorption liquid bin (423), and the end of the transverse pipe (51) is fixedly connected to a vertical smoke exhaust pipe (52).

7. A boiler wet condensing flue gas desulfurization and denitrification system according to claim 1, characterized in that: The outer side of the outer pipe (43) is wrapped with a preheating pipe (7), and the preheating pipe (7) and the outer pipe (43) are fixedly connected via a second short rod (71). The upper left end of the preheating pipe (7) is fixedly connected to a liquid inlet interface (72), and the upper right end of the preheating pipe (7) is fixedly connected to a liquid supply pipe (73), and the liquid supply pipe (73) is fixedly connected to the heating chamber (3).

8. A boiler wet condensing flue gas desulfurization and denitrification system according to claim 1, characterized in that: A temperature sensor 1 (411) is provided at the left end of the inner pipe (41), and a temperature display 1 (412) is fixedly connected to the outer wall of the combustion chamber (1), and the temperature display 1 (412) is electrically connected to the temperature sensor 1 (411).

9. A boiler wet condensing flue gas desulfurization and denitrification system according to claim 1, characterized in that: The top of the heating chamber (3) is fixedly connected to a heat supply pipe (31), the interior of the heating chamber (3) is fixedly connected to a second temperature sensor (32), the outer wall of the heating chamber (3) is fixedly connected to a second temperature display (33), and the second temperature sensor (32) is electrically connected to the second temperature display (33).

10. A boiler wet condensing flue gas desulfurization and denitrification system according to claim 1, characterized in that: The top of the heating chamber (3) is fixedly connected to a heat supply pipe (31), the interior of the heating chamber (3) is fixedly connected to a second temperature sensor (32), and the outer wall of the heating chamber (3) is fixedly connected to a second temperature display (33).

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