Ventilation air methane oxidation horizontal waste heat boiler

Abstract

The utility model relates to a waste heat boiler, and aims to provide a ventilation air methane oxidation horizontal type waste heat boiler which can meet the requirement for quick start and stop and can efficiently utilize high-temperature flue gas waste heat generated after ventilation air methane oxidation. According to the technical scheme, the ventilation air methane oxidation horizontal waste heat boiler is characterized in that a boiler body further comprises a first heating surface module, a second heating surface module and a third heating surface module which are arranged between an inlet flue and an outlet flue in the flue gas flowing direction; the three heating surface modules are all of an integrated modular structure. Each heating surface module comprises a mold frame and a heating surface, wherein the four sides of the mold frame are surrounded by mold plates to form the smoke channel, and the heating surface is arranged in the smoke channel. Wherein the first mold frame, the second mold frame and the third mold frame are the same in outer contour, and the flue gas channels are horizontally connected in series and are sequentially communicated, and then are communicated with the inlet flue and the outlet flue; and the heating surface comprises a high-pressure evaporator, a high-pressure superheater, a high-pressure economizer, a deoxidizing evaporator and a feed water heater.

Description

Technical Field

[0001] The utility model relates to a waste heat boiler, in particular to a wind-deficient oxidation horizontal waste heat boiler. Background Art

[0002] Lack of ventilation is also called coal mine exhaust gas, which refers to coal mine gas with a methane concentration of less than 0.75%. Coal mine gas is divided into exhaust gas and ventilation gas, the main component of which is methane, which is a high-quality, clean gas fuel, and is also the biggest hidden danger in coal production safety. At present, exhaust gas has been widely used, but almost all exhaust air has not been recycled and treated, but is directly discharged into the atmosphere, which not only causes a huge waste of energy, but also causes serious environmental pollution.

[0003] The principle of the air-deficient high-temperature oxidation is to introduce the air-deficient high-temperature oxidation device into the regenerative high-temperature oxidation device. The high-temperature oxidation device reactor has two regenerative chambers (ceramic beds) and a combustion chamber. During the reaction, the air inlet valve of regenerative chamber one and the air outlet valve of regenerative chamber two are opened, and the air outlet valve of regenerative chamber one and the air inlet valve of regenerative chamber two are closed. The airflow enters from ceramic bed one and is discharged from ceramic bed two after passing through the combustion chamber. With the periodic switching of the valves, the methane in the raw gas is periodically oxidized in the two ceramic beds.

[0004] The heat energy generated during the oxidation process is absorbed by the ceramic bed, so that the reactor always maintains a high temperature environment to be oxidized, and the entire gas utilization process operates stably and efficiently. Low-concentration methane is instantly oxidized into water and carbon dioxide without flames in the high-temperature reaction chamber, and releases huge oxidation heat. A small part of the heat energy is used to maintain the reaction temperature, and most of the heat energy is discharged and introduced into the waste heat boiler for energy recovery.

[0005] The high-temperature flue gas after high-temperature oxidation of the exhaust gas has a high temperature of about 950℃~1050℃, and the flue gas is relatively clean and can be used as the heat energy required by the waste heat boiler; but there is an urgent need to develop a waste heat boiler device with a reasonable structure and stable and reliable performance. Utility Model Content

[0006] The purpose of the utility model is to overcome the shortcomings of the above-mentioned background technology and provide a horizontal waste heat boiler with exhaust gas oxidation, which can meet the needs of rapid start and stop and can efficiently utilize the high-temperature flue gas waste heat after exhaust gas oxidation.

[0007] The utility model adopts the following technical solutions:

[0008] A wind-deficient oxidation horizontal waste heat boiler comprises a boiler body supported by a steel frame and provided with an inlet flue and an outlet flue, and a deoxidizing drum and a high-pressure drum are installed outside the boiler body;

[0009] It is characterized in that: the boiler body also includes a first heating surface module, a second heating surface module and a third heating surface module arranged between the inlet flue and the outlet flue along the flue gas flow direction; the three heating surface modules all adopt an integrated modular structure, and each heating surface module includes a mold frame with four sides surrounded by templates to form the flue gas channel and a heating surface arranged in the flue gas channel; the first mold frame, the second mold frame and the third mold frame have the same outer contour and the flue gas channels are horizontally connected in series and connected in sequence, and then connected to the inlet flue and the outlet flue; the heating surface includes a high-pressure evaporator, a high-pressure superheater, a high-pressure economizer, a deoxygenation evaporator and a feed water heater.

[0010] The first heating surface module comprises a second high-pressure evaporator, a second high-pressure superheater, and a first mold frame that surrounds the second high-pressure evaporator and the second high-pressure superheater and forms a flue gas flow passage.

[0011] The second heating surface module comprises a first high-pressure superheater, a first high-pressure evaporator, a second high-pressure economizer, and a second mold frame that surrounds the first high-pressure superheater, the first high-pressure evaporator, and the second high-pressure economizer and forms a flue gas flow passage.

[0012] The third heating surface module includes a first high-pressure economizer, a deaerator, a feedwater heater, which are arranged in sequence along the flue gas flow direction, and a third mold frame which encloses the first high-pressure economizer, the deaerator, the feedwater heater and forms a flue gas flow duct.

[0013] Each template includes a module inner lining plate, a module outer cover, and a heat-insulating material filled between the module inner lining plate and the module outer cover. The module outer cover at the top is provided with a module lifting lug for hoisting the entire module.

[0014] A header on the heating surface is arranged at the top of each heating surface. The inlet connecting pipe of the header on the heating surface passes through the outer protective plate of the top module upwards and is connected to the output pipe to input the water to be heated respectively; the outlet connecting pipe of the header on the heating surface passes through the outer protective plate of the top module upwards and is connected to the output pipe to output the superheated steam or hot water to the outside;

[0015] A lower header is provided at the bottom of each heating surface. The inlet connecting pipe of the lower header passes downward through the outer protective plate of the bottom module and is connected to the input pipe to input the water to be heated; the drain pipe of the lower header passes downward through the outer protective plate of the bottom module to discharge non-condensable water.

[0016] The inlet flue adopts a Pyro block insulation structure.

[0017] The thermal insulation material is aluminum silicate thermal insulation fiber.

[0018] The beneficial effects of the present invention are:

[0019] Firstly, the high-temperature flue gas of about 1000℃ after air-deficient oxidation is cooled to about 90℃ by heat exchange, fully recovering the heat in the flue gas;

[0020] Secondly, it is the first time in the field of wind-deficient oxidation waste heat boilers to adopt a horizontal modular structure without water-cooled walls and a fully drained heating surface structure, avoiding the traditional water-cooled wall boiler technical solution and greatly reducing the workload of on-site installation;

[0021] Third, the boiler inlet flue adopts the Pyro block insulation structure, and the overall insulation weight is only 10% of the conventional refractory casting material, saving materials. At the same time, this structure does not require furnace baking and can meet the needs of rapid start and stop;

[0022] Fourthly, all heating surfaces adopt the upper and lower header mode, which can achieve complete drainage, thus solving the risk of insufficient drainage in the heating surface tubes and freezing and cracking of the tubes due to low temperature after shutdown; at the same time, it effectively prevents the risk of tube bursting due to water in the superheater when restarting;

[0023] Fifth, the boiler waste heat realizes the cascade utilization of heat, fully utilizing the flue gas heat to deoxidize and preheat the condensate feed water to about 60℃, thus improving the boiler efficiency;

[0024] Sixth, the overall structure of the boiler is simple and easy to maintain, which reduces the primary investment cost and operation and maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the main structure of an embodiment of the utility model.

[0026] Figure 2 for Figure 1 Schematic diagram of the main structure of the first heating surface module.

[0027] Figure 3 for Figure 2 Schematic diagram of AA structure in.

[0028] Figure 4 for Figure 1 Schematic diagram of the main structure of the second heating surface module.

[0029] Figure 5 for Figure 4 Schematic diagram of the BB structure in .

[0030] Figure 6 for Figure 1 Schematic diagram of the main structure of the third heating surface module.

[0031] Figure 7 for Figure 6 Schematic diagram of CC structure in .

[0032] Markings in the figure: 100, inlet flue; 200, first heating surface module; 201, second high-pressure evaporator; 202, second high-pressure superheater; 203, second high-pressure evaporator lower header; 204, second high-pressure evaporator upper header; 205, second high-pressure superheater lower header; 206, second high-pressure superheater upper header; 207, second high-pressure evaporator lower header water side inlet connecting pipe; 208, second high-pressure evaporator upper header steam-water mixture outlet connecting pipe; 209, second high-pressure superheater lower header drain pipe; 210, second high-pressure superheater upper header steam inlet connecting pipe; 211, second high-pressure superheater upper header steam outlet connecting pipe; 212, first module lifting lug; 213, first module outer protective plate; 214, first module thermal insulation material; 215, first module inner lining plate;

[0033] 300, second heating surface module; 301, first high-pressure superheater; 302, first high-pressure evaporator; 303, second high-pressure economizer; 304, first high-pressure superheater lower header; 305, first high-pressure superheater upper header; 306, first high-pressure evaporator lower header; 307, first high-pressure evaporator upper header; 308, second high-pressure economizer lower header; 309, second high-pressure economizer upper header; 310, first high-pressure superheater lower header drain pipe; 311, first high-pressure superheater upper header steam inlet connecting pipe; 312. Steam outlet connecting pipe of the upper header of the first high-pressure superheater; 313. Water side inlet connecting pipe of the lower header of the first high-pressure evaporator; 314. Steam-water mixture outlet connecting pipe of the header of the first high-pressure evaporator; 315. Drain pipe of the lower header of the second high-pressure economizer; 316. Water side inlet connecting pipe of the upper header of the second high-pressure economizer; 317. Water side outlet connecting pipe of the upper header of the second high-pressure economizer; 318. Lifting lug of the second module; 319. External protective plate of the second module; 320. Thermal insulation material of the second module; 321. Lining plate of the second module;

[0034] 400, third heating surface module; 401, first high-pressure economizer; 402, deaeration evaporator; 403, feedwater heater; 404, first high-pressure economizer lower header; 405, first high-pressure economizer upper header; 406, deaeration evaporator lower header; 407, deaeration evaporator upper header; 408, feedwater heater lower header; 409, feedwater heater upper header; 410, first high-pressure economizer lower header drain pipe; 411, first high-pressure economizer upper header water side inlet connecting pipe; 4 12. The outlet connecting pipe of the upper header of the first high-pressure economizer on the water side; 413. The inlet connecting pipe of the lower header of the deaerator on the water side; 41. The outlet connecting pipe of the steam-water mixture of the upper header of the deaerator on the 41.4 deaerator; 415. The drain pipe of the lower header of the feedwater heater; 416. The inlet connecting pipe of the upper header of the feedwater heater on the water side; 417. The outlet connecting pipe of the upper header of the feedwater heater on the water side; 418. The lifting lug of the third module; 419. The outer protective plate of the third module; 420. The thermal insulation material of the third module; 421. The inner lining plate of the third module;

[0035] 500. Exit flue; 600. Deaerator drum; 700. High-pressure drum; 800. Steel frame. DETAILED DESCRIPTION

[0036] The technical solution of the utility model is further described in detail below in conjunction with the embodiments shown in the accompanying drawings.

[0037] The wind-deficient oxidation horizontal waste heat boiler shown in the attached drawings comprises a boiler body supported by a steel frame 800 and provided with an inlet flue 100 and an outlet flue 500, and a deoxidizing drum 600 and a high-pressure drum 700 are installed on the outside of the boiler body; this is similar to the existing waste heat boiler.

[0038] The improvement of the utility model is that the boiler body further comprises a first heating surface module 200, a second heating surface module 300, and a third heating surface module 400 which are arranged between the inlet flue and the outlet flue along the flue gas flow direction and are connected in sequence.

[0039] The first heating surface module 200 includes a second high-pressure evaporator 201, a second high-pressure superheater 202, and a first mold frame that surrounds the second high-pressure evaporator and the second high-pressure superheater and forms a flue gas flow channel.

[0040] The second heating surface module 300 includes a first high-pressure superheater 301, a first high-pressure evaporator 302, a second high-pressure economizer 303, and a second mold frame that surrounds the first high-pressure superheater, the first high-pressure evaporator, and the second high-pressure economizer and forms a flue gas flow channel.

[0041] The third heating surface module 400 includes a first high-pressure economizer 401, a deaeration evaporator 402, a feedwater heater 403, and a third mold frame which is arranged in sequence along the flue gas flow direction and encloses the first high-pressure economizer, the deaeration evaporator, and the feedwater heater and forms a flue gas flow passage.

[0042] The 100 inlet flue adopts the Pyro block insulation structure.

[0043] Each heating surface module adopts an integrated modular structure, in which the outer contours of the first mold frame, the second mold frame, and the third mold frame are the same and the four sides are surrounded by templates to form the smoke channel; the smoke channels of the three mold frames are horizontally connected in series and communicated in sequence, and then connected to the inlet smoke duct and the outlet smoke duct.

[0044] Each template includes a module inner lining plate, a module outer protective plate, and insulation material (usually aluminum silicate insulation fiber) filled between the module inner lining plate and the module outer protective plate. The top module outer protective plate is provided with a module lifting lug for lifting the entire module so that the module can be smoothly transported and installed.

[0045] The first template includes a first module inner lining plate 215, a first module outer protective plate 213, and a first module thermal insulation material 214 (usually aluminum silicate thermal insulation fiber) filled between the first module inner lining plate and the first module outer protective plate, and a plurality of first module hanging ears 212 are provided on the top of the first module outer protective plate;

[0046] The second template includes a second module inner lining plate 321, a second module outer cover plate 319, and a second module thermal insulation material 320 (usually aluminum silicate thermal insulation fiber) filled between the second module inner lining plate and the second module outer cover plate, and a plurality of second module hanging ears 318 are provided on the top of the second module outer cover plate;

[0047] The third template includes a third module inner lining plate 421, a third module outer protective plate 419, and a third module thermal insulation material 420 (usually aluminum silicate thermal insulation fiber) filled between the third module inner lining plate and the third module outer protective plate. A plurality of third module hanging ears 418 are provided on the top of the third module outer protective plate.

[0048] A number of heating surfaces (including high-pressure evaporator, high-pressure superheater, high-pressure economizer, deaerator evaporator, feedwater heater) are vertically arranged in the flue gas channel of each mold frame. The top of the heating surface is the header on the heating surface (including the upper header of the high-pressure evaporator, the upper header of the high-pressure superheater, the upper header of the high-pressure economizer, the upper header of the deaerator evaporator, and the upper header of the feedwater heater). The outlet connecting pipes of the headers on the heating surface (including the steam-water mixture outlet connecting pipe of the upper header of the high-pressure evaporator, the steam outlet connecting pipe of the upper header of the high-pressure superheater, The high-pressure economizer upper header water side outlet connecting pipe, the deaeration evaporator upper header steam-water mixture outlet connecting pipe, the feedwater heater upper header water side outlet connecting pipe) and the inlet connecting pipes of the headers on the heating surface (including the high-pressure evaporator upper header steam inlet connecting pipe, the high-pressure superheater upper header steam inlet connecting pipe, the high-pressure economizer upper header water side inlet connecting pipe, the feedwater heater upper header water side inlet connecting pipe) respectively pass upward through the top module outer guard plate and then connect to the output pipe to output superheated steam or hot water to the outside;

[0049] The bottom end of the heating surface is connected to the lower header of the heating surface below it (including the lower header of the high-pressure evaporator, the lower header of the high-pressure superheater, the lower header of the high-pressure economizer, the lower header of the deaerator evaporator, and the lower header of the feedwater heater); the inlet connecting pipe of the lower header of the heating surface (including the water-side inlet connecting pipe of the lower header of the high-pressure evaporator and the water-side inlet connecting pipe of the lower header of the deaerator evaporator) passes downward through the outer protective plate of the bottom module and is connected to the input pipe to input the water to be heated. The lower header drain pipe of the heating surface connected to the lower header of the heating surface (including the drain pipe of the lower header of the high-pressure superheater, the drain pipe of the lower header of the high-pressure economizer, and the drain pipe of the lower header of the feedwater heater) also passes downward through the outer protective plate of the bottom module to discharge non-condensable water.

[0050] Wherein: In the first heating surface module:

[0051] The second high-pressure evaporator lower header 203 connected to the bottom end of the second high-pressure evaporator 201 inputs saturated water from the high-pressure boiler drum 700 through the second high-pressure evaporator lower header water side inlet connecting pipe 207 that passes downward through the bottom of the first module outer protective plate; the second high-pressure evaporator upper header 204 connected to the top end of the second high-pressure evaporator 201 sends the steam-water mixture back to the high-pressure boiler drum 700 for separation through a plurality of second high-pressure evaporator upper header steam-water outlet connecting pipes 208 that pass upward through the top of the first module outer protective plate.

[0052] The second high-pressure superheater upper header 206 connected to the top of the second high-pressure superheater 202 inputs steam from the first high-pressure superheater upper header steam outlet connecting pipe 312 through the second high-pressure superheater upper header steam inlet connecting pipe 210 passing upward through the top of the first module outer shield; at the same time, it outputs superheated steam to the downstream device through the second high-pressure superheater upper header steam outlet connecting pipe 211 passing upward through the top of the first module outer shield. The second high-pressure superheater lower header 205 connected to the bottom of the second high-pressure superheater 202 discharges non-condensable water through the second high-pressure superheater lower header drain pipe 209 passing downward through the bottom of the first module outer shield.

[0053] In the second heating surface module:

[0054] The first high-pressure superheater upper header 305 connected to the top end of the first high-pressure superheater 301 inputs saturated steam from the high-pressure boiler drum 700 through the first high-pressure superheater upper header steam inlet connecting pipe 311 that passes upward through the top of the second module outer protective plate; the first high-pressure superheater upper header 305 connected to the top end of the first high-pressure superheater 301 outputs superheated steam to the second high-pressure superheater upper header steam inlet connecting pipe 210 through the first high-pressure superheater upper header steam outlet connecting pipe 312 that passes upward through the top of the second module outer protective plate; the first high-pressure superheater lower header 304 connected to the bottom end of the first high-pressure superheater 301 discharges non-condensable water through the first high-pressure superheater lower header drain pipe 310 that passes downward through the bottom of the second module outer protective plate.

[0055] The first high-pressure evaporator lower header 306 connected to the bottom end of the first high-pressure evaporator 302 inputs saturated water from the high-pressure boiler drum 700 through the first high-pressure evaporator lower header water side inlet connecting pipe 313 that passes downward through the bottom of the second module outer protective plate; the first high-pressure evaporator upper header 307 connected to the top end of the first high-pressure evaporator 302 sends the steam-water mixture back to the high-pressure boiler drum 700 for separation through a plurality of first high-pressure evaporator upper header steam outlet connecting pipes 314 that pass upward through the top of the second module outer protective plate.

[0056] The second high-pressure economizer upper header 309 connected to the top end of the second high-pressure economizer 303 inputs high-pressure feed water from the first high-pressure economizer upper header water side outlet connecting pipe 412 through the second high-pressure economizer upper header water side inlet connecting pipe 316 passing upward through the top of the second module outer protective plate; at the same time, hot water is output to the high-pressure boiler drum 700 through the second high-pressure economizer upper header water side outlet connecting pipe 317 passing upward through the top of the second module outer protective plate; the second high-pressure economizer lower header 308 connected to the bottom end of the second high-pressure economizer 303 discharges non-condensable water through the second high-pressure economizer drain pipe 315 passing downward through the bottom of the second module outer protective plate.

[0057] In the third heating surface module:

[0058] The first high-pressure economizer upper header 405 connected to the top of the first high-pressure economizer 401 inputs high-pressure feed water from the high-pressure water pump through the first high-pressure economizer upper header water side inlet connecting pipe 411 that passes upward through the top of the third module outer protective plate; at the same time, hot water is output to the second high-pressure economizer upper header water side inlet connecting pipe 316 through the first high-pressure economizer upper header water side outlet connecting pipe 412 that passes upward through the top of the third module outer protective plate; the first high-pressure economizer lower header 404 connected to the bottom of the first high-pressure economizer 401 discharges non-condensable water through the first high-pressure economizer drain pipe 410 that passes downward through the bottom of the second module outer protective plate;

[0059] The deaeration evaporator lower header 406 connected to the bottom end of the deaeration evaporator 402 inputs saturated water from the deaeration drum 600 through the deaeration evaporator lower header water side inlet connecting pipe 413 that passes downward through the bottom of the outer protective plate of the third module; the deaeration evaporator upper header 407 connected to the top end of the deaeration evaporator 402 sends the steam-water mixture back to the deaeration drum 600 for thermal deoxidation through the deaeration evaporator upper header steam-water mixture outlet connecting pipe 414 that passes upward through the top of the outer protective plate of the third module.

[0060] The feedwater heater upper header 409 connected to the top end of the feedwater heater 403 inputs condensed return water through the feedwater heater upper header water side inlet connecting pipe 416 that passes upward through the top of the outer protective plate of the third module; at the same time, the preheated condensed return water is output to the deaerator drum 600 through the feedwater heater upper header water side outlet connecting pipe 417 that passes upward through the top of the outer protective plate of the third module; the feedwater heater lower header 408 connected to the bottom end of the feedwater heater 403 discharges non-condensable water through the feedwater heater drain pipe 415 that passes downward through the bottom of the outer protective plate of the third module.

[0061] In addition, a first module lifting lug 212 is installed on the top of the first module outer protective plate, a second module lifting lug 318 is installed on the top of the second module outer protective plate, and a third module lifting lug 418 is installed on the top of the third module outer protective plate; they are respectively used to lift the first heating surface module, the second heating surface module and the third heating surface module.

[0062] The second high-pressure evaporator 201 is located before the second high-pressure superheater 202 and is used to adjust the flue gas temperature to prevent the second high-pressure superheater from overheating.

[0063] The specific process of the wind-deficient oxidation horizontal waste heat boiler is as follows:

[0064] Flue gas side process:

[0065] 1) The high-temperature flue gas of about 1000°C generated after the exhaust gas is oxidized is introduced into the boiler body through the inlet flue 100;

[0066] 2) The high-temperature flue gas flows through the second high-pressure evaporator 201, the second high-pressure superheater 202, the first high-pressure superheater 301, the first high-pressure evaporator 302, the second high-pressure economizer 303, the first high-pressure economizer 401, the deaerator 402, and the feedwater heater 403 in the boiler body in sequence, and exchanges heat with them, and finally the flue gas temperature is cooled to about 90°C;

[0067] 3) The flue gas after heat exchange and cooling is discharged out of the boiler body through the outlet flue 500.

[0068] Water side process:

[0069] 1) The condensed return water generated after the steam is utilized is transported to the feed water heater 403 through the condensate pump, and the condensate is preheated by the hot flue gas and then transported to the deaerator drum 600;

[0070] 2) The preheated condensed water enters the deaerator evaporator 402 through the deaerator drum down pipe, and after being further heated, it flows back into the deaerator drum 600 through the deaerator drum up pipe. At the same time, the saturated steam from the high-pressure drum 700 also heats the condensed water in the deaerator drum 600. In this way, under the thermal effect of the two, the temperature of the condensed water in the deaerator drum 600 is quickly heated to the saturation temperature, and the oxygen dissolved in it is quickly precipitated, thereby achieving the purpose of deoxygenation;

[0071] 3) The deoxygenated saturated water is pressurized by the high-pressure water pump 900 and transported to the first high-pressure economizer 401 and the second high-pressure economizer 303 in sequence to continue to exchange heat with the flue gas before entering the high-pressure boiler drum 700;

[0072] 4) The high-pressure feed water enters the second high-pressure evaporator 201 and the first high-pressure evaporator 302 through the high-pressure boiler drum down pipe, is heated into a steam-water mixture, and then flows back into the high-pressure boiler drum 700 through the high-pressure boiler drum up pipe;

[0073] 5) The steam-water mixture is separated into saturated steam and saturated water under the separation effect of the high-pressure drum 700. The saturated water continues to return to the second high-pressure evaporator 201 and the first high-pressure evaporator 302 under the action of gravity to exchange heat with the flue gas to form a steam-water mixture; the saturated steam flows through the second high-pressure superheater 202 and the first high-pressure superheater 3011 to be heated into superheated steam for use by downstream devices.

[0074] The above-described embodiment is only a preferred solution of the present invention and does not limit the present invention in any form. There are other variations and modifications without exceeding the technical solution described in the claims.

Claims

1. A wind-deficient oxidation horizontal waste heat boiler, comprising a boiler body supported by a steel frame (800) and provided with an inlet flue (100) and an outlet flue (500), a deoxidizing drum (600) and a high-pressure drum (700) being installed outside the boiler body; Features: The boiler body also includes a first heating surface module (200), a second heating surface module (300) and a third heating surface module (400) which are arranged between the inlet flue and the outlet flue along the flue gas flow direction and are connected in sequence; the three heating surface modules all adopt an integrated modular structure, and each heating surface module includes a mold frame with four sides surrounded by mold plates to form a flue gas channel and a heating surface arranged in the flue gas channel; the first mold frame, the second mold frame and the third mold frame all have the same outer contour and the flue gas channels are horizontally connected in series and connected in sequence, and then connected to the inlet flue and the outlet flue; the heating surface includes a high-pressure evaporator, a high-pressure superheater, a high-pressure economizer, a deoxygenation evaporator and a feed water heater.

2. The wind-deficient oxidation horizontal waste heat boiler according to claim 1 is characterized in that: The first heating surface module (200) comprises a second high-pressure evaporator (201), a second high-pressure superheater (202) arranged in sequence along the flue gas flow direction, and a first mold frame enclosing the second high-pressure evaporator and the second high-pressure superheater and forming a flue gas flow passage; The second heating surface module (300) comprises a first high-pressure superheater (301), a first high-pressure evaporator (302), a second high-pressure economizer (303) arranged in sequence along the flue gas flow direction, and a second mold frame enclosing the first high-pressure superheater, the first high-pressure evaporator, and the second high-pressure economizer and forming a flue gas flow passage; The third heating surface module (400) comprises a first high-pressure economizer (401), a deaerator (402), a feedwater heater (403) arranged in sequence along the flue gas flow direction, and a third mold frame enclosing the first high-pressure economizer, the deaerator, the feedwater heater and forming a flue gas flow duct.

3. The horizontal waste heat boiler with exhaust air oxidation according to claim 2 is characterized in that: Each template includes a module inner lining plate, a module outer cover, and a heat-insulating material filled between the module inner lining plate and the module outer cover. The module outer cover at the top is provided with a module lifting lug for hoisting the entire module.

4. The horizontal waste heat boiler with exhaust air oxidation according to claim 3 is characterized in that: A header on the heating surface is arranged at the top of each heating surface. The inlet connecting pipe of the header on the heating surface passes through the outer protective plate of the top module upwards and is connected to the output pipe to input the water to be heated respectively; the outlet connecting pipe of the header on the heating surface passes through the outer protective plate of the top module upwards and is connected to the output pipe to output the superheated steam or hot water to the outside; A lower header is provided at the bottom of each heating surface. The inlet connecting pipe of the lower header passes downward through the outer protective plate of the bottom module and is connected to the input pipe to input the water to be heated; the drain pipe of the lower header passes downward through the outer protective plate of the bottom module to discharge non-condensable water.

5. The wind-deficient oxidation horizontal waste heat boiler according to claim 4 is characterized in that: The inlet flue (100) adopts a Pyro block insulation structure.

6. The wind-deficient oxidation horizontal waste heat boiler according to claim 5, characterized in that: The thermal insulation material is aluminum silicate thermal insulation fiber.

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