Acid-resistant and high-temperature-resistant gas and gas heat exchange device with flushing function

Abstract

The utility model provides an acid-resistant and high-temperature-resistant gas and gas heat exchange device with a flushing function, which relates to the technical field of laboratory instruments and comprises an acid-resistant and high-temperature-resistant titanium alloy heat exchange box. According to the utility model, the discharged toxic, harmful and high-temperature acid gas enters the inner cavity of the acid-resistant and high-temperature-resistant titanium alloy heat exchange box from the high-temperature acid flue gas inlet, the heat of the high-temperature acid gas is transferred to the heat exchange titanium alloy fixed fins, and air blown out by the outdoor air blower enters from the low-temperature outdoor clean air inlet; by means of the design, the low-temperature outdoor clean air is shunted into the titanium alloy fresh air pipelines of the heat exchange devices through the one-to-many titanium alloy taps, so that the contact area between the low-temperature outdoor clean air and the high-temperature acid gas is increased; meanwhile, the sectional area of the low-temperature outdoor clean air is reduced, and the low-temperature outdoor clean air can absorb heat transferred by the high-temperature acid gas more easily.

Description

Technical Field

[0001] The utility model relates to the technical field of laboratory instruments, in particular to a gas-to-gas heat exchange device which is self-flushing, acid-resistant and high-temperature-resistant. Background Art

[0002] In many metallurgical testing and chemical analysis laboratories, fume hoods that use electric furnaces to heat strong acids to melt samples are required. The exhaust volume of the fume hood is relatively large to discharge toxic and harmful acidic gases out of the room, and corresponding outdoor air is also required to be supplemented into the laboratory to achieve a corresponding balance of air pressure in the laboratory; but in the north where the temperature is very low in winter, if a large amount of outdoor low-temperature air is supplemented, the indoor temperature will drop very low, making the laboratory operators feel very uncomfortable, and the large amount of heat generated by the heating electric furnace in the fume hood is discharged to the outside along with the toxic and harmful gases, causing a large amount of heat loss, so a gas-to-gas heat exchange device is needed.

[0003] However, in the prior art, when a gas-to-gas heat exchange device is used in the laboratory to heat the high-temperature acid gas of a strong acid melting sample in an electric furnace and the outdoor clean air, it is found that the outdoor clean air inside a part of the gas-to-gas heat exchange device is discharged before being heated to a suitable temperature due to excessive flow rate, which can easily cause serious heat loss. Utility Model Content

[0004] The purpose of the utility model is to solve the problems existing in the prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a self-flushing acid-resistant and high-temperature-resistant gas-to-gas heat exchange device, comprising: an acid-resistant and high-temperature-resistant titanium alloy heat exchange box, one side of the acid-resistant and high-temperature-resistant titanium alloy heat exchange box is fixedly embedded with a high-temperature acidic flue gas inlet, and the other side of the acid-resistant and high-temperature-resistant titanium alloy heat exchange box is fixedly embedded with an acidic flue gas outlet after heat exchange cooling, both sides of the inner cavity of the acid-resistant and high-temperature-resistant titanium alloy heat exchange box are fixedly embedded with a one-turn multi-titanium alloy tap, one end of the two one-turn multi-titanium alloy taps is fixedly connected with a plurality of heat exchange device titanium alloy fresh air ducts, and the surfaces of the plurality of heat exchange device titanium alloy fresh air ducts are fixedly connected with a plurality of heat exchange titanium alloy fixed ribs, the other end of one of the one-turn multi-titanium alloy taps is fixedly connected with a low-temperature outdoor clean air inlet, and the other end of another one of the one-turn multi-titanium alloy taps is fixedly connected with an outdoor clean air outlet after heat exchange heating, and the top and bottom of the acid-resistant and high-temperature-resistant titanium alloy heat exchange box are both provided with a flushing component;

[0006] The flushing assembly includes two spiral nozzles and two anti-corrosion PP return water branches, one end of the two spiral nozzles is fixedly connected to the anti-corrosion PP water supply branch, the other end of the two anti-corrosion PP water supply branch is connected to the anti-corrosion PP water supply main pipe, the other end of the anti-corrosion PP water supply main pipe is fixedly connected to the flushing alkali solution PP storage tower, the bottom and top of one side of the flushing alkali solution PP storage tower are respectively fixedly embedded with a wastewater pipe and a water supply pipe, the surface of the wastewater pipe is provided with a drain ball valve, the surface of the water supply pipe is provided with a gate valve, one end of the water supply pipe is fixedly connected with a float valve, one end of the two anti-corrosion PP return water branches is connected to the anti-corrosion PP return water main pipe, the surface of the anti-corrosion PP return water main pipe is provided with PP ball valve 2, and the surface of the other end of the anti-corrosion PP return water main pipe is fixedly embedded in the top of one side of the flushing alkali solution PP storage tower.

[0007] As a preferred embodiment, the interiors of the high-temperature acidic flue gas inlet and the acidic flue gas outlet after heat exchange and cooling are both connected to the inner cavity of the acid-resistant and high-temperature resistant titanium alloy heat exchange box.

[0008] As a preferred embodiment, the surface of the anti-corrosion PP water supply main is sequentially provided with an anti-corrosion solenoid valve, a one-way valve, an anti-corrosion circulating water pump and a PP ball valve; the surface of the anti-corrosion circulating water pump is electrically connected to a control electrical box; the interior of the anti-corrosion PP water supply main is connected to the interior of the PP liquid storage tower for flushing alkali solution.

[0009] As a preferred embodiment, the interior of the wastewater pipe is connected to the inner cavity of the flushing alkali solution PP storage tower.

[0010] As a preferred embodiment, the interior of the anti-corrosion PP water return main pipe is connected with the inner cavity of the PP liquid storage tower for flushing alkali solution.

[0011] As a preferred embodiment, the surfaces of the two spiral nozzles are fixedly embedded in the top and bottom of the acid-resistant and high-temperature resistant titanium alloy heat exchange box, the surfaces of one ends of the two anti-corrosion PP return water branches are fixedly embedded in the bottom of the acid-resistant and high-temperature resistant titanium alloy heat exchange box, and the interiors of the two anti-corrosion PP return water branches are connected with the inner cavity of the acid-resistant and high-temperature resistant titanium alloy heat exchange box.

[0012] Compared with the prior art, the advantages and positive effects of the utility model are:

[0013] 1. According to the utility model, when an electric furnace is used to heat a strong acid melting sample device in the north where the outdoor temperature is very low in winter, the toxic and harmful high-temperature acidic gas discharged enters the inner cavity of the acid-resistant and high-temperature resistant titanium alloy heat exchange box from the high-temperature acidic flue gas inlet, and the heat of the high-temperature acidic gas is transferred to the heat-exchanging titanium alloy fixed ribs. At the same time, the wind blown out by the outdoor blower enters from the low-temperature outdoor clean air inlet, and is diverted to the titanium alloy fresh air ducts of multiple heat exchange devices through a one-turn multi-titanium alloy tap. The design of diverting the low-temperature outdoor clean air through the one-turn multi-titanium alloy tap to the interior of the titanium alloy fresh air ducts of multiple heat exchange devices increases the contact area between the low-temperature outdoor clean air and the high-temperature acidic gas, and at the same time reduces the cross-sectional area of ​​the low-temperature outdoor clean air, so that the low-temperature outdoor clean air is more easily absorbed by the heat transferred by the high-temperature acidic gas.

[0014] 2. In the utility model, due to long-term use, the surface of the titanium alloy fresh air duct of the heat exchange device is covered with smoke and dust, and the anti-corrosion circulating water pump can be started regularly by controlling the electrical box. The anti-corrosion circulating water pump extracts the flushing alkali solution stored in the flushing alkali solution PP storage tower, and the flushing alkali solution is sprayed from two spiral nozzles through the anti-corrosion PP water supply main pipe and the anti-corrosion PP water supply branch pipe to flush the surface of the titanium alloy fresh air duct of the heat exchange device. This design avoids the accumulation of smoke and dust covering the surface of the titanium alloy fresh air duct of the heat exchange device, thereby reducing the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 An overview schematic diagram of a self-flushing, acid-resistant and high-temperature-resistant gas-to-gas heat exchange device provided by the utility model;

[0016] Figure 2 The utility model provides a self-flushing, acid-resistant and high-temperature-resistant gas-to-gas heat exchange device;

[0017] Figure 3 The utility model provides a self-flushing, acid-resistant and high-temperature-resistant gas-to-gas heat exchange device;

[0018] Figure 4 The utility model provides a gas-to-gas heat exchange device which is self-flushing, acid-resistant and high-temperature-resistant.

[0019] Legend:

[0020] 1. Acid-resistant and high-temperature resistant titanium alloy heat exchange box; 101. High-temperature acidic flue gas inlet; 102. Acidic flue gas outlet after heat exchange cooling; 103. Titanium alloy fresh air duct of heat exchange device; 104. Low-temperature outdoor clean air inlet; 105. Outdoor clean air outlet after heat exchange heating; 106. Heat exchange titanium alloy fixed ribs; 107. One-turn multi-titanium alloy tap 2. Flushing assembly; 201. Spiral nozzle; 202. Anti-corrosion PP water supply manifold ; 203, anti-corrosion PP water supply main pipe; 204, anti-corrosion solenoid valve; 205, one-way valve; 206, anti-corrosion circulating water pump; 207, control electrical box; 208, PP ball valve one; 209, PP storage tower for flushing alkali solution; 210, wastewater pipe; 211, drain ball valve; 212, float valve; 213, water supply pipe; 214, gate valve; 215, anti-corrosion PP return water branch pipe; 216, anti-corrosion PP return water main pipe; 217, PP ball valve two. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-4 The utility model provides a technical solution: a self-flushing acid-resistant and high-temperature-resistant gas-to-gas heat exchange device, comprising: an acid-resistant and high-temperature-resistant titanium alloy heat exchange box 1, a high-temperature acidic flue gas inlet 101 is fixedly embedded on one side of the acid-resistant and high-temperature-resistant titanium alloy heat exchange box 1, and an acidic flue gas outlet 102 after heat exchange and cooling is fixedly embedded on the other side of the acid-resistant and high-temperature-resistant titanium alloy heat exchange box 1, and a one-turn multi-titanium alloy tap 107 is fixedly embedded on both sides of the inner cavity of the acid-resistant and high-temperature-resistant titanium alloy heat exchange box 1, and two one-turn multi-titanium alloy taps 107 are fixedly embedded. One end of the heat exchange device titanium alloy fresh air duct 103 is fixedly connected, and the surfaces of the multiple heat exchange device titanium alloy fresh air ducts 103 are fixedly connected with multiple heat exchange titanium alloy fixed ribs 106, the other end of one of the one-turn multi-titanium alloy tap joints 107 is fixedly connected with a low-temperature outdoor clean air inlet 104, and the other end of another one-turn multi-titanium alloy tap joint 107 is fixedly connected with a heat exchange heated outdoor clean air outlet 105, and the top and bottom of the acid-resistant and high-temperature resistant titanium alloy heat exchange box 1 are both provided with a flushing assembly 2;

[0023] The flushing assembly 2 includes two spiral nozzles 201 and two anti-corrosion PP water return branches 215. One end of the two spiral nozzles 201 is fixedly connected to the anti-corrosion PP water supply branch 202. The other end of the two anti-corrosion PP water supply branch 202 is connected to the anti-corrosion PP water supply main pipe 203. The other end of the anti-corrosion PP water supply main pipe 203 is fixedly connected to the flushing alkali solution PP liquid storage tower 209. The bottom and top of one side of the flushing alkali solution PP liquid storage tower 209 are respectively fixedly embedded with a wastewater pipe 210 and a supply pipe 215. The surfaces of the water pipe 213 and the waste water pipe 210 are provided with a drain ball valve 211, the surface of the water supply pipe 213 is provided with a gate valve 214, one end of the water supply pipe 213 is fixedly connected with a float valve 212, one end of the two anti-corrosion PP return water branches 215 are connected with an anti-corrosion PP return water main 216, the surface of the anti-corrosion PP return water main 216 is provided with a PP ball valve 217, and the surface of the other end of the anti-corrosion PP return water main 216 is fixedly embedded in the top of one side of the flushing alkali solution PP storage tower 209.

[0024] Specifically: the exhausted toxic and harmful high-temperature acidic gas enters the inner cavity of the acid-resistant and high-temperature resistant titanium alloy heat exchange box 1 from the high-temperature acidic flue gas inlet 101, and the heat of the high-temperature acidic gas is transferred to the heat exchange titanium alloy fixed ribs 106. The wind blown out by the outdoor blower enters from the low-temperature outdoor clean air inlet 104, and is diverted to multiple heat exchange device titanium alloy fresh air ducts 103 through a one-turn multi-titanium alloy tap. This design of diverting the low-temperature outdoor clean air through a one-turn multi-titanium alloy tap to multiple heat exchange device titanium alloy fresh air ducts 103 increases the contact area between the low-temperature outdoor clean air and the high-temperature acidic gas, and at the same time reduces the cross-sectional area of ​​the low-temperature outdoor clean air. The low-temperature outdoor clean air is more easily absorbed by the heat transferred by the high-temperature acidic gas. The heat exchange device titanium alloy fresh air duct 103 can regularly start the anti-corrosion circulating water pump 206 through the control electric box 207 to prevent The anti-corrosion circulating water pump 206 extracts the flushing alkali liquid stored in the flushing alkali liquid PP storage tower 209, and the flushing alkali liquid is sprayed out from two spiral nozzles 201 through the anti-corrosion PP water supply main pipe 203 and the anti-corrosion PP water supply branch pipe 202 to flush the surface of the titanium alloy fresh air duct 103 of the heat exchange device. This design avoids the accumulation of smoke and dust covering the surface of the titanium alloy fresh air duct 103 of the heat exchange device, thereby reducing the heat exchange efficiency; the one-way valve 205 prevents the flushing alkali liquid inside the flushing alkali liquid PP storage tower 209 from flowing back to the inner cavity of the acid-resistant and high-temperature resistant titanium alloy heat exchange box 1 when the anti-corrosion circulating water pump 206 is in a stopped state; this heat exchange device is welded with anti-corrosion titanium alloy and has the properties of high temperature resistance and acid and alkali resistance, so it can operate in high-temperature acidic flue gas and will not be damaged due to operation in such an environment; the heat exchange titanium alloy fixed ribs 106 increase the heat exchange area and improve the heat exchange efficiency.

[0025] In one embodiment, the interiors of the high-temperature acidic flue gas inlet 101 and the acidic flue gas outlet 102 after heat exchange and cooling are both connected to the inner cavity of the acid-resistant and high-temperature resistant titanium alloy heat exchange box 1 .

[0026] Specifically: the high-temperature acidic flue gas inlet 101 is connected to the exhaust port of the electric furnace heating strong acid melting sample device, the acidic flue gas outlet 102 is connected to the outdoors after heat exchange cooling, the low-temperature outdoor clean air inlet 104 is connected to the air outlet of the outdoor blower, and the outdoor clean air outlet 105 is placed indoors after heat exchange heating. Heat exchange is carried out inside the acid-resistant and high-temperature resistant titanium alloy heat exchange box 1, and the wind blown in from the low-temperature outdoor clean air inlet 104 is heated.

[0027] In one embodiment, the surface of the anti-corrosion PP water supply main pipe 203 is sequentially provided with an anti-corrosion solenoid valve 204, a one-way valve 205, an anti-corrosion circulating water pump 206 and a PP ball valve 208; the surface of the anti-corrosion circulating water pump 206 is electrically connected to a control electrical box 207; the interior of the anti-corrosion PP water supply main pipe 203 is connected to the interior of the flushing alkali solution PP liquid storage tower 209.

[0028] Specifically: the flushing alkali solution is sprayed out from the spiral nozzle 201 to flush the surface of the titanium alloy fresh air duct 103 of the heat exchange device, and then flows back to the inside of the flushing alkali solution PP storage tower 209 through the anti-corrosion PP return water branch 215 and the anti-corrosion PP return water main 216.

[0029] In one embodiment, the interior of the waste water pipe 210 is connected to the inner cavity of the flushing alkali solution PP storage tower 209 .

[0030] Specifically, the waste liquid in the alkali solution PP storage tower 209 can be discharged to the indoor waste water pipe through the waste water pipe 210 by opening the drain ball valve 211 .

[0031] In one embodiment, the interior of the anti-corrosion PP water return pipe 216 is connected to the inner cavity of the flushing alkali solution PP liquid storage tower 209.

[0032] Specifically: in the initial state, the gate valve 214 is in the open state, and the float valve 212 can be opened or closed according to the liquid level of the flushing alkali solution inside the flushing alkali solution PP storage tower 209. When the float valve 212 is in the open state, pure water flows out of the flushing alkali solution PP storage tower 209 through the water supply pipe 213 for replenishment.

[0033] In one embodiment, the surfaces of the two spiral nozzles 201 are fixedly embedded in the top and bottom of the acid-resistant and high-temperature resistant titanium alloy heat exchange box 1, and the surfaces of one end of the two anti-corrosion PP return water branches 215 are fixedly embedded in the bottom of the acid-resistant and high-temperature resistant titanium alloy heat exchange box 1, and the interiors of the two anti-corrosion PP return water branches 215 are connected with the inner cavity of the acid-resistant and high-temperature resistant titanium alloy heat exchange box 1.

[0034] Specifically: the flushing alkali solution is sprayed out from the spiral nozzle 201 to flush the surface of the titanium alloy fresh air duct 103 of the heat exchange device, and then flows back to the inside of the flushing alkali solution PP storage tower 209 through the anti-corrosion PP return water branch 215 and the anti-corrosion PP return water main 216.

[0035] Working principle: the high-temperature acidic flue gas inlet 101 of the device is connected to the exhaust port of the strong acid melting sample device heated by the electric furnace, the acidic flue gas outlet 102 is connected to the outdoor after heat exchange cooling, the low-temperature outdoor clean air inlet 104 is connected to the air outlet of the outdoor blower, the outdoor clean air outlet 105 is placed indoors after heat exchange heating, one end of the water supply pipe 213 is connected to the pure water supply pipe, the other end of the waste water pipe 210 is connected to the indoor waste water pipe, and the device is connected to an external power supply device, the external power supply device provides power to the anti-corrosion circulating water pump 206 and the control electric box 207, the control electric box 207 is electrically connected to the anti-corrosion circulating water pump 206 and is associated with the control; when an electric furnace is used to heat the strong acid melting sample device in the north in winter when the outdoor temperature is very low, the toxic and harmful high-temperature acid gas discharged enters the inner cavity of the acid-resistant and high-temperature resistant titanium alloy heat exchange box 1 from the high-temperature acid flue gas inlet 101, and the heat of the high-temperature acid gas is transferred to the heat exchange titanium alloy fixed rib 106. At the same time, the wind blown by the outdoor blower enters from the low-temperature outdoor clean air inlet 104, and is diverted to multiple heat exchange device titanium alloy fresh air ducts 103 through a multi-titanium alloy tap. In this way, the low-temperature outdoor clean air is designed to pass through a The titanium alloy taps are used to shunt the air to multiple heat exchange devices, and the interior of the titanium alloy fresh air duct 103 increases the contact area between the low-temperature outdoor clean air and the high-temperature acidic gas, while reducing the cross-sectional area of ​​the low-temperature outdoor clean air. The low-temperature outdoor clean air is more likely to absorb the heat transferred by the high-temperature acidic gas; the heated air is blown into the room from the outdoor clean air outlet 105 after being heated by the heat exchange. This design fully recycles the heat energy generated by the heating furnace and reduces the energy consumption of laboratory air conditioning; due to long-term use, the surface of the titanium alloy fresh air duct 103 of the heat exchange device is covered with smoke and accumulated, and the initial state is In this state, the low-temperature outdoor clean air inlet 104 and the PP ball valve 208 are both in the open state, and the anti-corrosion circulating water pump 206 can be started regularly by controlling the electrical box 207. The anti-corrosion circulating water pump 206 extracts the flushing alkali solution stored in the flushing alkali solution PP storage tower 209, and the flushing alkali solution passes through the anti-corrosion PP water supply main pipe 203 and the anti-corrosion PP water supply branch pipe 202 and is sprayed from two spiral nozzles 201 to flush the surface of the titanium alloy fresh air duct 103 of the heat exchange device. This design avoids the accumulation of smoke and dust covering the surface of the titanium alloy fresh air duct 103 of the heat exchange device, thereby reducing the heat exchange efficiency.

[0036] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A self-flushing, acid-resistant and high-temperature-resistant gas-to-gas heat exchange device, characterized in that: include: Acid-resistant and high-temperature-resistant titanium alloy heat exchange box (1), wherein a high-temperature acidic flue gas inlet (101) is fixedly embedded on one side of the acid-resistant and high-temperature-resistant titanium alloy heat exchange box (1), and an acidic flue gas outlet (102) after heat exchange and cooling is fixedly embedded on the other side of the acid-resistant and high-temperature-resistant titanium alloy heat exchange box (1), and a multi-turn titanium alloy tap (107) is fixedly embedded on both sides of the inner cavity of the acid-resistant and high-temperature-resistant titanium alloy heat exchange box (1), and one end of the two multi-turn titanium alloy taps (107) is fixedly connected to a plurality of heat exchange device titanium alloy fresh air ducts (103), the surfaces of the plurality of titanium alloy fresh air ducts (103) of the heat exchange device are fixedly connected with a plurality of heat exchange titanium alloy fixed ribs (106), the other end of one of the one-turn multi-titanium alloy tap joints (107) is fixedly connected with a low-temperature outdoor clean air inlet (104), and the other end of another one-turn multi-titanium alloy tap joint (107) is fixedly connected with a heat exchange heated outdoor clean air outlet (105), and the top and bottom of the acid-resistant and high-temperature resistant titanium alloy heat exchange box (1) are both provided with flushing components (2); The flushing assembly (2) comprises two spiral nozzles (201) and two anti-corrosion PP water return branches (215), one end of each of the two spiral nozzles (201) is fixedly connected to an anti-corrosion PP water supply branch (202), the other end of each of the two anti-corrosion PP water supply branches (202) is connected to an anti-corrosion PP water supply main pipe (203), the other end of the anti-corrosion PP water supply main pipe (203) is fixedly connected to a flushing alkali solution PP liquid storage tower (209), and a wastewater pipe (210) and a water supply pipe (215) are fixedly embedded at the bottom and top of one side of the flushing alkali solution PP liquid storage tower (209) respectively. 213), a drain ball valve (211) is arranged on the surface of the waste water pipe (210), a gate valve (214) is arranged on the surface of the water supply pipe (213), one end of the water supply pipe (213) is fixedly connected with a float valve (212), one end of the two anti-corrosion PP return water branches (215) is connected with an anti-corrosion PP return water main pipe (216), a PP ball valve 2 (217) is arranged on the surface of the anti-corrosion PP return water main pipe (216), and the surface of the other end of the anti-corrosion PP return water main pipe (216) is fixedly embedded in the top of one side of the flushing alkali solution PP liquid storage tower (209).

2. A self-flushing, acid-resistant and high-temperature-resistant gas-to-gas heat exchange device according to claim 1, characterized in that: The interiors of the high-temperature acidic flue gas inlet (101) and the acidic flue gas outlet (102) after heat exchange and cooling are both connected to the inner cavity of the acid-resistant and high-temperature resistant titanium alloy heat exchange box (1).

3. A self-flushing, acid-resistant and high-temperature-resistant gas-to-gas heat exchange device according to claim 1, characterized in that: The surface of the anti-corrosion PP water supply main pipe (203) is provided with an anti-corrosion solenoid valve (204), a one-way valve (205), an anti-corrosion circulating water pump (206) and a PP ball valve (208) in sequence. The surface of the anti-corrosion circulating water pump (206) is electrically connected to a control electrical box (207). The interior of the anti-corrosion PP water supply main pipe (203) is connected to the interior of the alkali solution PP storage tower (209).

4. A self-flushing, acid-resistant and high-temperature-resistant gas-to-gas heat exchange device according to claim 3, characterized in that: The interior of the wastewater pipe (210) is connected to the inner cavity of the flushing alkali solution PP storage tower (209).

5. The self-flushing, acid-resistant and high-temperature-resistant gas-to-gas heat exchange device according to claim 1, characterized in that: The interior of the anti-corrosion PP water return pipe (216) is connected to the inner cavity of the flushing alkali solution PP liquid storage tower (209).

6. The self-flushing, acid-resistant and high-temperature-resistant gas-to-gas heat exchange device according to claim 1, characterized in that: The surfaces of the two spiral nozzles (201) are fixedly embedded in the top and bottom of the acid-resistant and high-temperature resistant titanium alloy heat exchange box (1), the surfaces of one end of the two anti-corrosion PP return water branches (215) are fixedly embedded in the bottom of the acid-resistant and high-temperature resistant titanium alloy heat exchange box (1), and the interiors of the two anti-corrosion PP return water branches (215) are connected to the inner cavity of the acid-resistant and high-temperature resistant titanium alloy heat exchange box (1).

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