A system for boiler parameter control and monitoring

Abstract

The present invention discloses a system for boiler parameter control and monitoring, which relates to the technical field of improving boiler thermal efficiency. It includes a furnace body, and a serpentine flue is formed inside the furnace body. It further includes a parameter detection module and a parameter control module. The parameter detection module includes multiple groups of temperature monitoring units arranged at intervals in sequence along the path direction of the serpentine flue. The parameter control module is arranged at the smoke inlet and the smoke outlet of the furnace body. Both ends of the serpentine flue of the furnace body are provided with a smoke inlet and a smoke outlet. By the temperature states monitored by the multiple groups of temperature monitoring units, the opening and closing of the smoke inlet and the smoke outlet are controlled by using the parameter control module, so that the flue gas flow direction in the serpentine flue can be switched. The present invention utilizes the temperature monitoring data to control the opening and closing of the smoke inlet and the smoke outlet, and according to the principle of maximizing thermal efficiency utilization, switches the flue gas flow direction in the serpentine flue, so that the temperature in the entire flue can be increased, and the waste heat recovery efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of improving the thermal efficiency of boilers, and more specifically to a system for boiler parameter control and monitoring. Background Art

[0002] A waste heat boiler is a boiler device that uses the waste heat in industrial production processes, waste materials, or waste liquids, as well as the heat generated after the combustion of combustible substances, to heat water and produce steam or hot water. This heat can come from gases or exhaust gases, waste liquids in various industrial processes, and the heat of the exhaust of certain power machinery. Waste heat boilers are divided into two categories: fire-tube type and water-tube type, and their structures are similar to those of industrial boilers. Fire-tube waste heat boilers have a large water storage capacity and relatively small steam pressure fluctuations under the conditions of fluctuating flue gas volume and steam consumption, but their evaporation capacity and steam pressure are both limited by the drum diameter and operating conditions. Water-tube waste heat boilers have two circulation methods: auxiliary circulation and natural circulation. Waste heat boilers are widely used in industries such as coal, iron and steel, non-ferrous metals, chemical industry, cement, building materials, and petrochemical industry. The waste heat resources in these industries account for about 17% to 67% of their total fuel consumption, and the recoverable waste heat resources account for about 60% of the total waste heat resources. As an important energy-saving device, waste heat boilers not only improve energy utilization efficiency by recovering waste heat resources in industrial production, but also help reduce environmental pollution and greenhouse gas emissions.

[0003] The flue gas outlet temperature is an important indicator to measure the thermal efficiency of a waste heat boiler. Under the condition of a given inlet flue gas temperature, there are two requirements for the flue gas outlet temperature: one is to limit the flue gas outlet temperature within a reasonable range; the other is not to limit the flue gas outlet temperature to maximize the utilization of waste heat. The reduction of the flue gas outlet temperature means that more heat is recovered, thereby improving the thermal efficiency. However, for the entire boiler, the temperature at the flue gas inlet is higher than that at the flue gas outlet. That is to say, it is not easy to achieve equilibrium in the overall thermal efficiency utilization of the boiler. If the temperature inside the entire boiler can be increased, it will be more conducive to the utilization of heat.

[0004] Therefore, how to improve the utilization of heat, improve the thermal efficiency, and provide a system for boiler parameter control and monitoring is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the present invention provides a system for boiler parameter control and monitoring, aiming to solve the above technical problems.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A system for boiler parameter control and monitoring includes a furnace body, a serpentine flue is formed inside the furnace body, and a heat exchanger is provided inside the serpentine flue; it also includes: a parameter detection module and a parameter control module;

[0008] The parameter detection module includes a plurality of groups of temperature monitoring units arranged in sequence and at intervals along the path direction of the serpentine flue;

[0009] The parameter control module is arranged at the smoke inlet and the smoke exhaust port of the furnace body. The smoke inlet and the smoke exhaust port are provided at both ends of the serpentine flue of the furnace body. The temperature state is monitored by multiple groups of temperature monitoring units, and the parameter control module is used to control the opening and closing of the smoke inlet and the smoke exhaust port, so that the smoke flow direction of the serpentine flue can be switched.

[0010] Through the above technical scheme, the present invention provides a method for monitoring and controlling the temperature parameters in the waste heat boiler in a linked manner, and uses the temperature monitoring data to control the opening and closing of the smoke inlet and the smoke exhaust port. According to the principle of maximum utilization of thermal efficiency, the direction of flue gas flow in the serpentine flue is switched, so that the temperature in the entire flue can be improved, avoiding insufficient thermal efficiency caused by the temperature on the smoke inlet side being continuously too high and the temperature on the smoke outlet side being continuously too low, thereby improving the overall waste heat recovery efficiency.

[0011] Preferably, in the above-mentioned boiler parameter control and monitoring system, the plurality of temperature monitoring units are divided into a high-temperature monitoring area at the front and a low-temperature monitoring area at the rear according to the flue gas flow direction of the serpentine flue, and the high-temperature monitoring area and the low-temperature monitoring area are switched according to the flue gas flow direction of the serpentine flue. By repeatedly switching the flue gas flow direction, the high-temperature monitoring area and the low-temperature monitoring area are repeatedly switched, thereby stably increasing the temperature inside the entire furnace body, effectively utilizing waste heat and shortening the conversion time of thermal energy.

[0012] Preferably, in the above-mentioned boiler parameter control and monitoring system, the switching of the flue gas flow direction needs to meet the following three conditions at the same time: ① The average temperature of the high temperature monitoring zone exceeds the high temperature monitoring temperature setting average value of the high temperature monitoring zone; ② The temperature of the temperature monitoring unit near the smoke inlet in the high temperature monitoring zone exceeds the high temperature monitoring temperature setting maximum value; ③ After the low temperature monitoring zone reaches the low temperature monitoring temperature setting average value, it continues to heat up within the set time. The detection of the average temperature of the high temperature monitoring zone represents that the highest thermal efficiency has been reached, and further increase is a waste of heat; the setting of the high temperature monitoring temperature setting maximum value represents the degree of damage to the inner wall of the furnace body, and continuous high temperature increases the damage to it; the detection of the low temperature monitoring temperature setting average value represents the balance time of thermal energy, preventing energy loss caused by frequent repeated switching; the overall control logic is rigorous and has a more precise control effect.

[0013] Preferably, in the above-mentioned boiler parameter control and monitoring system, when any one of condition ① and condition ② is met, the monitoring of condition ③ is started, and finally when all three conditions are met, switching is performed. Meeting the three conditions at the same time can not only improve thermal efficiency, but also prevent heat energy loss caused by frequent switching.

[0014] Preferably, in the above-mentioned boiler parameter control and monitoring system, the parameter control module controls the smoke inlet and the smoke exhaust port in the following manner: the smoke inlet at one end of the serpentine flue is opened and the smoke exhaust port is closed, and the smoke exhaust port at the other end of the serpentine flue is opened and the smoke inlet is closed.

[0015] Preferably, in the above-mentioned boiler parameter control and monitoring system, when the flue gas flow direction is switched: when one of the smoke inlets is gradually opened, the other smoke inlet is gradually closed, and when one of the smoke exhaust ports is gradually closed, the other smoke exhaust port is gradually opened.

[0016] Preferably, in the above-mentioned boiler parameter control and monitoring system, the two smoke inlets are combined into a main smoke inlet pipe, the two smoke exhaust ports are combined into a main smoke exhaust pipe, and the main smoke exhaust pipe has a circulation branch pipe connected to the main smoke inlet pipe. In order to further improve the utilization of thermal energy, the present invention designs a circulation branch pipe so that the heat of the flue gas can be recycled.

[0017] Preferably, in the above-mentioned boiler parameter control and monitoring system, the parameter detection module also includes a pressure monitoring unit arranged in the middle of the serpentine flue.

[0018] Preferably, in the above-mentioned boiler parameter control and monitoring system, when the flue gas flow direction is switched and the two smoke inlets and the two smoke exhaust outlets are in the switching middle position, the circulation branch pipe is connected to the main smoke inlet pipe to perform internal circulation of the smoke inside the serpentine flue. At this time, the two smoke inlets and the two smoke exhaust outlets stop in the middle switching state, and when the pressure monitoring unit reaches the pressure monitoring set value, the opening and closing action of the smoke inlet and the smoke exhaust outlet continues.

[0019] Preferably, in the above-mentioned boiler parameter control and monitoring system, the parameter control module can simultaneously and linkage-control the opening and closing switching actions of the two smoke inlets and the two smoke exhaust outlets.

[0020] It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses a boiler parameter control and monitoring system, which has the following beneficial effects:

[0021] 1. The present invention provides a method for jointly monitoring and controlling the temperature parameters in a waste heat boiler. By using the temperature monitoring data, it controls the opening and closing of the flue gas inlet and outlet, and according to the principle of maximizing heat efficiency utilization, switches the flow direction of the flue gas in the serpentine flue, so as to increase the temperature in the entire flue, avoid insufficient heat efficiency caused by continuously high temperature on the flue gas inlet side and continuously low temperature on the flue gas outlet side, and overall improve the waste heat recovery efficiency.

[0022] 2. When the present invention switches the flow direction of the flue gas, it takes into account the use of the highest heat efficiency, the degree of damage to the inner wall of the furnace body, and the heat energy balance time, which can not only improve the heat efficiency but also prevent heat energy loss caused by frequent switching.

[0023] 3. In order to further improve the utilization of heat energy, the present invention designs a circulating branch pipeline so that the heat of the flue gas can be recycled.

[0024] 4. The parameter control module provided by the present invention can simultaneously and jointly control the opening and closing switching actions of the two flue gas inlets and the two flue gas outlets, making the control simpler and more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0026] Figure 1 The drawings are schematic diagrams of the external structure of the furnace body provided by the present invention;

[0027] Figure 2 The drawings are schematic diagrams of the internal structure of the furnace body provided by the present invention;

[0028] Figure 3 The drawings are for the present invention in Figure 1 Schematic diagram of the structure with the pipeline removed on the basis of the structure;

[0029] Figure 4 The drawings are for the present invention Figure 3 Enlarged view of the partial area A in;

[0030] Figure 5 The drawings are for the present invention in Figure 3 Schematic diagram of the structure with the parameter control module removed on the basis of the structure;

[0031] Figure 6 The drawings are for the present invention Figure 5 Enlarged view of the partial area B in;

[0032] Figure 7 The attached drawing is a schematic diagram of the flow direction of flue gas in the external pipeline under normal operation conditions of the flue gas in the furnace body provided by the present invention;

[0033] Figure 8 The attached drawing is a schematic diagram of the flow direction of flue gas in the external pipeline under the switched operation condition of the flue gas in the furnace body provided by the present invention;

[0034] Figure 9 The attached drawing is a schematic diagram of the process of the flue gas switching state provided by the present invention.

[0035] Wherein:

[0036] 1 - Furnace body;

[0037] 11 - Serpentine flue; 12 - Smoke inlet; 121 - First smoke inlet; 122 - Second smoke inlet; 13 - Smoke outlet; 131 - First smoke outlet; 132 - Second smoke outlet; 14 - Partition board; 15 - First slideway; 16 - Second slideway;

[0038] 2 - Parameter detection module;

[0039] 21 - Multiple groups of temperature monitoring units; 22 - Pressure monitoring unit;

[0040] 3 - Parameter control module;

[0041] 31 - Smoke inlet switching cover plate; 32 - Smoke outlet switching cover plate; 33 - Support; 34 - Bidirectional drive motor; 35 - Drive gear; 36 - Rack;

[0042] 4 - Total smoke inlet pipeline;

[0043] 41 - First one - way valve;

[0044] 5 - Total smoke exhaust pipeline;

[0045] 51 - Circulation branch pipeline; 511 - Second one - way valve; 512 - Second solenoid valve; 52 - First solenoid valve. Specific embodiments

[0046] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the attached drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0047] See the attached Figure 1 and the attached Figure 2, an embodiment of the present invention discloses a boiler parameter control and monitoring system, including a furnace body 1, a serpentine flue 11 is formed in the furnace body 1, and a heat exchanger is provided in the serpentine flue 11; further including: a parameter detection module 2 and a parameter control module 3;

[0048] The parameter detection module 2 includes multiple groups of temperature monitoring units 21 arranged at intervals in sequence along the path direction of the serpentine flue 11;

[0049] The parameter control module 3 is arranged at the smoke inlet 12 and the smoke outlet 13 of the furnace body 1. Both ends of the serpentine flue 11 of the furnace body 1 are provided with a smoke inlet 12 and a smoke outlet 13. By the temperature state monitored by multiple groups of temperature monitoring units 21, the parameter control module 3 is used to control the opening and closing of the smoke inlet 12 and the smoke outlet 13, so that the flue gas flow direction of the serpentine flue 11 can be switched.

[0050] In order to further optimize the above technical solution, multiple groups of temperature monitoring units 21 are divided into a high-temperature monitoring area at the front and a low-temperature monitoring area at the back according to the flue gas flow direction of the serpentine flue 11, and the high-temperature monitoring area and the low-temperature monitoring area are switched according to the flue gas flow direction of the serpentine flue 11.

[0051] As Figure 2 shown, taking the illustrated direction as the standard, if the smoke enters from the left and exits from the right, then the left side is the high-temperature monitoring area and the right side is the low-temperature monitoring area. For the convenience of description in this embodiment, the following specific structure description is based on the simple structure of the furnace body 1 shown in Figure 2 shown. As shown in the figure, the furnace body 1 forms a serpentine flue 11 through a partition 14.

[0052] Further, multiple groups of temperature monitoring units 21 are arranged on both side walls of the furnace body 1 from top to bottom.

[0053] In order to further optimize the above technical solution, the switching of the flue gas flow direction needs to simultaneously meet the following 3 conditions: ① The average temperature of the high-temperature monitoring area exceeds the set average value of the high-temperature monitoring temperature of the high-temperature monitoring area; ② The temperature of the temperature monitoring unit near the smoke inlet in the high-temperature monitoring area exceeds the set maximum value of the high-temperature monitoring temperature; ③ After the low-temperature monitoring area reaches the set average value of the low-temperature monitoring temperature, it still continues to rise within the set time.

[0054] In order to further optimize the above technical solution, the logical calculation relationship of the 3 conditions for the switching of the flue gas flow direction is: when any one of condition ① and condition ② is satisfied, the monitoring of condition ③ is started, and finally when all 3 conditions are satisfied, the switching is performed.

[0055] This embodiment needs to explain the design of the above logical relationship:

[0056] First, for condition ①: the average temperature of the high temperature monitoring area exceeds the set average temperature of the high temperature monitoring area. When this condition is reached, it means that the temperature of the high temperature monitoring area has reached the maximum value of thermal efficiency, so the direction can be switched to transfer more heat to the low temperature monitoring area. Moreover, after the direction is switched, the temperature of the original high temperature monitoring area will not drop rapidly, but will be maintained for a period of time during the waste heat absorption process.

[0057] For condition ②: the temperature of the temperature monitoring unit near the smoke inlet in the high temperature monitoring area exceeds the maximum value set for the high temperature monitoring temperature. When this condition is reached, it means that there is a hidden danger of damage to the furnace.

[0058] Therefore, regardless of condition ① or condition ②, it reflects that the temperature has reached a certain level. Further heating up the high-temperature monitoring area will not only waste heat, but also damage the furnace. Therefore, the direction can be switched based on any of the above conditions.

[0059] For condition ③: After the low temperature monitoring area reaches the set average value of the low temperature monitoring temperature, it continues to heat up within the set time. The setting of this condition is mainly to balance the time in repeated switching. Assuming that it has been switched once, the original low temperature monitoring area becomes the high temperature monitoring area, which is actually heating up, while the original high temperature monitoring area becomes the low temperature monitoring area and will gradually cool down. It can be seen that after the low temperature monitoring area becomes the high temperature monitoring area, the heating speed must be faster than the cooling speed of the high temperature monitoring area becoming the low temperature monitoring area. Therefore, if only conditions ① and ② are used as the switching standard, the problem of repeated switching will occur, resulting in excessive frequency, which will reduce the thermal efficiency. Therefore, condition ③ is added, that is, when the temperature drops to the set average value of the low temperature monitoring temperature, it means that the original high temperature has been used up and the temperature has returned to the normal temperature of the low temperature monitoring area. At this time, it will continue to heat up, which is affected by the high temperature monitoring area (in fact, in most cases, the temperature of the low temperature monitoring area will remain at a temperature without dropping, and the temperature rise is relatively slow). Therefore, this can make the thermal efficiency higher and prevent repeated switching.

[0060] The set values ​​of temperature and time are set according to different boiler conditions. In this embodiment, if the smoke inlet temperature is 250-300°C, the high temperature monitoring temperature setting average value can be set to between 210-260°C, and the high temperature monitoring temperature setting maximum value can be set to between 230-280°C. The low temperature monitoring temperature setting average value can be set to between 100-150°C, and the time for continuous heating within the set time can be set to 30 minutes.

[0061] See attached Figure 3 To Attachment Figure 6 The parameter control module 3 can simultaneously control the opening and closing switching actions of the two smoke inlets 12 and the two smoke exhaust outlets 13.

[0062] In this embodiment, the smoke inlet 12 includes a first smoke inlet 121 and a second smoke inlet 122. Both the first smoke inlet 121 and the second smoke inlet 122 are located on the top wall of the furnace body 1 and correspond to both sides of the partition 14 inside the furnace body 1. The smoke outlet 13 includes a first smoke outlet 131 and a second smoke outlet 132. Both the first smoke outlet 131 and the second smoke outlet 132 are located at the top of the side wall of the furnace body 1 and correspond to both sides of the partition 14 inside the furnace body 1, and are close to the first smoke inlet 121 and the second smoke inlet 122.

[0063] First slideways 15 are provided on both sides of the first smoke inlet 121 and the second smoke inlet 122. A smoke inlet switching cover plate 31 is slidably connected to the first slideways 15. Second slideways 16 are provided on both sides of the first smoke inlet 121 and the second smoke inlet 122. A smoke outlet switching cover plate 32 is slidably connected to the second slideways 16. A bracket 33 is fixed to the top of the side wall of the furnace body 1. The bracket 33 is fixed between the smoke inlet switching cover plate 31 and the smoke outlet switching cover plate 32. A bidirectional drive motor 34 is fixed to the bracket 33. A drive gear 35 is fixed to the power output end of the bidirectional drive motor 34. Rack teeth 36 that mesh with the drive gear 35 are provided on the corresponding edges of the smoke inlet switching cover plate 31 and the smoke outlet switching cover plate 32. When the drive gear 35 rotates, the smoke inlet switching cover plate 31 and the smoke outlet switching cover plate 32 can be controlled to move in different directions, thereby realizing the opening and closing of the smoke inlets 12 and the smoke outlets 13 on both sides of the partition 14.

[0064] To further optimize the above technical solution, the parameter control module 3 controls the smoke inlets 12 and the smoke outlets 13 in the following way: the smoke inlet 12 at one end of the serpentine flue 11 is opened, the smoke outlet 13 is closed, and the smoke outlet 13 at the other end of the serpentine flue 11 is opened, and the smoke inlet 12 is closed.

[0065] To further optimize the above technical solution, when the direction of the flue gas flow is switched: when one smoke inlet 12 is gradually opened, the other smoke inlet 12 is gradually closed, and when one smoke outlet 13 is gradually closed, the other smoke outlet 13 is gradually opened.

[0066] That is, when the first smoke inlet 121 is closed, the second smoke inlet 122 is opened. At this time, the first smoke outlet 131 is opened, and the second smoke outlet 132 is closed. Similarly, when the first smoke inlet 121 is opened, the second smoke inlet is closed. At this time, the first smoke outlet 131 is closed, and the second smoke outlet 132 is opened.

[0067] In addition, when the smoke inlet switching cover plate 31 and the smoke outlet switching cover plate 32 are in the middle position corresponding to each other up and down, all four smoke openings are opened.

[0068] To further optimize the above technical solution, the two smoke inlets 12 are aggregated into a main smoke inlet pipe 4, and the two smoke outlets 13 are aggregated into a main smoke exhaust pipe 5. Moreover, a circulating branch pipe 51 communicating with the main smoke inlet pipe 4 is provided on the main smoke exhaust pipe 5.

[0069] As Figure 1 shown, in order to avoid the sliding of the smoke inlet switching cover plate 31 and the smoke outlet switching cover plate 32, the main smoke inlet pipe 4 and the main smoke exhaust pipe 5 have notches. Corresponding telescopic baffles can be provided at these notches to shield both sides along with the sliding of the cover plates, or heat-resistant flexible materials can be used for shielding, which are not shown in the figure.

[0070] To further optimize the above technical solution, the parameter detection module 2 further includes a pressure monitoring unit 22 provided in the middle of the serpentine flue 11.

[0071] To further optimize the above technical solution, when the flue gas flow direction is switched and the two smoke inlets 12 and the two smoke outlets 13 are in the switching middle position, the circulating branch pipe 51 communicates with the main smoke inlet pipe 4 to perform the internal flue gas circulation in the serpentine flue 11. At this time, the two smoke inlets 12 and the two smoke outlets 13 stop at the middle position switching state, and when the pressure monitoring unit 22 reaches the pressure monitoring set value, the opening and closing actions of the smoke inlets 12 and the smoke outlets 13 continue.

[0072] To meet the above operations, as Figure 7 and Figure 9 shown, a first one-way valve 41 is provided on the main smoke inlet pipe 4, a first solenoid valve 52 is provided on the main smoke exhaust pipe 5, and a second one-way valve 511 and a second solenoid valve 512 are provided on the circulating branch pipe 51.

[0073] Refer to Appendix Figure 7 to Appendix Figure 9 . Under normal conditions, taking Figure 9 the first figure in it as an example, the flue gas enters from the second smoke inlet 122 and is discharged from the first smoke outlet 131. At this time, as Figure 7 shown, the flue gas enters from the main smoke inlet pipe 4, passes through the first one-way valve 41, and after following the direction of the arrow in Figure 9 the first figure, is discharged from the main smoke exhaust pipe 5. At this time, the first solenoid valve 52 on the main smoke exhaust pipe 5 is opened, and the second solenoid valve 512 is closed.

[0074] When the monitoring meets the above three conditions, the bidirectional drive motor 34 is started to perform the opening and closing switching of the smoke ports. At this time, as Figure 9 shown in the second figure. At this time, the first solenoid valve 52 is closed, the second solenoid valve 512 is opened, the flue gas is not discharged, part of it flows downward in the serpentine flue 11, and part of it returns from the two smoke outlets 13 to the main smoke inlet pipe 4 through the circulating branch pipe 51, as Figure 8As shown. At this time, all four smoke outlets remain open, and the bidirectional drive motor 34 is turned off until the pressure monitoring unit 22 monitors that the pressure reaches the set value, and then the bidirectional drive motor 34 restarts to complete the switching, as Figure 9 shown in the third figure in

[0075] In this embodiment, the temperature monitoring unit 21 is a temperature sensor or a thermocouple; the pressure monitoring unit 22 is a pressure sensor.

[0076] In this specification, the various embodiments are described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple. For the relevant parts, please refer to the descriptions in the method part.

[0077] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A boiler parameter control and monitoring system, comprising a furnace body (1), wherein a serpentine flue (11) is formed in the furnace body (1), and a heat exchanger is arranged in the serpentine flue (11); characterized in that: Also includes: Parameter detection module (2) and parameter control module (3); The parameter detection module (2) comprises a plurality of groups of temperature monitoring units (21) arranged in sequence and at intervals along the path direction of the serpentine flue (11); The parameter control module (3) is arranged at the smoke inlet (12) and the smoke exhaust port (13) of the furnace body (1); the smoke inlet (12) and the smoke exhaust port (13) are arranged at both ends of the serpentine flue (11) of the furnace body (1); the parameter control module (3) is used to control the opening and closing of the smoke inlet (12) and the smoke exhaust port (13) according to the temperature state monitored by the multiple groups of temperature monitoring units (21), so that the smoke flow direction of the serpentine flue (11) can be switched; The plurality of temperature monitoring units (21) are divided into a front high-temperature monitoring area and a rear low-temperature monitoring area according to the flue gas flow direction of the serpentine flue (11), and the high-temperature monitoring area and the low-temperature monitoring area are switched according to the flue gas flow direction of the serpentine flue (11); The switching of the flue gas flow direction must simultaneously meet the following three conditions: ① The average temperature of the high temperature monitoring area exceeds the set average value of the high temperature monitoring temperature of the high temperature monitoring area; ② The temperature of the temperature monitoring unit near the smoke inlet in the high temperature monitoring area exceeds the set maximum value of the high temperature monitoring temperature; ③ After the low temperature monitoring area reaches the set average value of the low temperature monitoring temperature, it continues to rise within the set time; The logical calculation relationship of the three conditions for switching the flue gas flow direction is: when any of conditions ① and ② is met, the monitoring of condition ③ is started, and finally when all three conditions are met, the switching is performed; The smoke inlet (12) comprises a first smoke inlet (121) and a second smoke inlet (122), the first smoke inlet (121) and the second smoke inlet (122) are both located on the top wall of the furnace body (1) and correspond to both sides of the partition (14) inside the furnace body (1), and the smoke exhaust port (13) comprises a first smoke exhaust port (131) and a second smoke exhaust port (132), the first smoke exhaust port (131) and the second smoke exhaust port (132) are both located on the top of the side wall of the furnace body (1) and correspond to both sides of the partition (14) inside the furnace body (1) and are close to the first smoke inlet (121) and the second smoke inlet (122); A first slideway (15) is provided on both sides of the first smoke inlet (121) and the second smoke inlet (122), and a smoke inlet switching cover plate (31) is slidably connected to the first slideway (15). A second slideway (16) is provided on both sides of the first smoke inlet (121) and the second smoke inlet (122), and a smoke outlet switching cover plate (32) is slidably connected to the second slideway (16). A bracket (33) is fixed to the top of the side wall of the furnace body (1), and the bracket (33) is fixed between the smoke inlet switching cover plate (31) and the smoke outlet switching cover plate (32). A bidirectional driving motor (34) is fixed on the partition plate (33), a driving gear (35) is fixed on the power output end of the bidirectional driving motor (34), and corresponding edges of the smoke inlet switching cover plate (31) and the smoke outlet switching cover plate (32) are provided with a rack (36) meshing with the driving gear (35); when the driving gear (35) rotates, the smoke inlet switching cover plate (31) and the smoke outlet switching cover plate (32) can be controlled to run in different directions, thereby realizing the opening and closing of the smoke inlet (12) and the smoke outlet (13) on both sides of the partition plate (14).

2. A boiler parameter control and monitoring system according to claim 1, characterized in that: The parameter control module (3) controls the smoke inlet (12) and the smoke exhaust port (13) in the following manner: the smoke inlet (12) at one end of the serpentine flue (11) is opened and the smoke exhaust port (13) is closed, and the smoke exhaust port (13) at the other end of the serpentine flue (11) is opened and the smoke inlet (12) is closed.

3. A boiler parameter control and monitoring system according to claim 2, characterized in that: When the smoke flow direction is switched: when one of the smoke inlet ports (12) is gradually opened, the other of the smoke inlet ports (12) is gradually closed, and when one of the smoke exhaust ports (13) is gradually closed, the other of the smoke exhaust ports (13) is gradually opened.

4. A boiler parameter control and monitoring system according to claim 3, characterized in that: The two smoke inlets (12) are combined into a main smoke inlet pipe (4), and the two smoke exhaust ports (13) are combined into a main smoke exhaust pipe (5), and the main smoke exhaust pipe (5) has a circulation branch pipe (51) connected to the main smoke inlet pipe (4).

5. A boiler parameter control and monitoring system according to claim 4, characterized in that: The parameter detection module (2) further comprises a pressure monitoring unit (22) arranged in the middle of the serpentine flue (11).

6. A boiler parameter control and monitoring system according to claim 5, characterized in that: When the smoke flow direction is switched and the two smoke inlets (12) and the two smoke exhaust outlets (13) are in a switching middle position, the circulation branch pipe (51) is connected to the main smoke inlet pipe (4) to perform internal smoke circulation inside the serpentine flue (11). At this time, the two smoke inlets (12) and the two smoke exhaust outlets (13) stop in a middle switching state, and when the pressure monitoring unit (22) reaches a pressure monitoring set value, the opening and closing action of the smoke inlet (12) and the smoke exhaust outlet (13) continues.

7. A boiler parameter control and monitoring system according to claim 1, characterized in that: The parameter control module (3) can simultaneously and linkage-control the opening and closing switching actions of the two smoke inlets (12) and the two smoke exhaust outlets (13).

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