System for controlling and monitoring boiler parameters

Abstract

The invention discloses a boiler parameter control and monitoring system, and relates to the technical field of boiler thermal efficiency improvement, the boiler parameter control and monitoring system comprises a hearth body, and a snakelike flue is formed in the hearth body; the system further comprises a parameter detection module and a parameter control module. The parameter detection module comprises a plurality of groups of temperature monitoring units which are sequentially arranged at intervals along the path direction of the snake-shaped flue; the parameter control modules are arranged at a smoke inlet and a smoke outlet of the hearth body, the smoke inlet and the smoke outlet are formed in the two ends of a snake-shaped flue of the hearth body, and the smoke inlet and the smoke outlet are controlled to be opened and closed by the parameter control modules according to the temperature state monitored by the multiple sets of temperature monitoring units, so that the smoke flowing direction of the snake-shaped flue can be switched. According to the invention, the opening and closing of the smoke inlet and the smoke outlet are controlled by using temperature monitoring data, and the flowing direction of smoke in the snake-shaped flue is switched according to the principle of maximum utilization of heat efficiency, so that the temperature in the whole 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 boiler thermal efficiency improvement, and more particularly to a boiler parameter control and monitoring system. Background Art

[0002] Waste heat boiler is a boiler equipment that uses the waste heat in waste gas, waste materials or waste liquid in the industrial production process and the heat generated by the combustion of combustible materials to heat water and produce steam or hot water. This heat can come from gas or waste gas, waste liquid in various industrial processes, as well as the heat of exhaust from certain power machinery. Waste heat boilers are divided into two types: fire tube type and water tube type, and their structure is similar to that of industrial boilers. Fire tube waste heat boilers have a large water storage capacity, and the steam pressure fluctuation is small under the conditions of flue gas volume and steam consumption fluctuations, but their evaporation capacity and steam pressure are limited by the diameter of the drum and operating conditions. Water tube waste heat boilers have two circulation modes: auxiliary circulation and natural circulation. Waste heat boilers are widely used in coal, steel, nonferrous metals, chemicals, cement, building materials, petrochemicals and other industries. The waste heat resources in these industries account for about 17% to 67% of their total fuel consumption, of which the recyclable waste heat resources account for about 60% of the total waste heat resources. As an important energy-saving equipment, waste heat boilers not only improve energy utilization efficiency but also help reduce environmental pollution and greenhouse gas emissions by recycling waste heat resources in industrial production.

[0003] The exhaust gas temperature is an important indicator for measuring the thermal efficiency of waste heat boilers. Under the given inlet flue gas temperature conditions, there are two requirements for the exhaust gas temperature: one is to limit the exhaust gas temperature within a reasonable range; the other is not to limit the exhaust gas temperature to maximize the use of waste heat. The reduction of the exhaust gas temperature means that more heat is recovered, thereby improving the thermal efficiency. However, for the entire boiler, the temperature of the smoke inlet is higher than the temperature of the smoke exhaust port. In other words, it is not easy to achieve a balance 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 use of heat.

[0004] Therefore, how to improve the utilization of heat, increase thermal efficiency, and provide a boiler parameter control and monitoring system is an urgent problem that technical personnel in this field need to solve. Summary of the invention

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

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] A boiler parameter control and monitoring system, including a furnace body, a serpentine flue is formed in the furnace body, and a heat exchanger is provided in 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 monitoring and controlling the temperature parameters in the waste heat boiler in a linked manner. The temperature monitoring data is used 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 smoke flow in the serpentine flue is switched, so that the temperature in the entire flue can be improved, thereby 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 waste heat recovery efficiency as a whole.

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

[0023] 3. 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.

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

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0026] Figure 1 The accompanying drawing is a schematic diagram of the structure of the exterior of the furnace body provided by the present invention;

[0027] Figure 2 The accompanying drawing is a schematic diagram of the structure inside the furnace body provided by the present invention;

[0028] Figure 3 The accompanying drawings provide Figure 1 A schematic diagram of the structure with the pipeline removed based on the structure;

[0029] Figure 4 The accompanying drawings provide Figure 3 A magnified view of the part A in the middle;

[0030] Figure 5 The accompanying drawings provide Figure 3 A schematic diagram of a structure in which a parameter control module is removed based on the structure;

[0031] Figure 6 The accompanying drawings provide Figure 5 A magnified view of the part B in the middle;

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

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

[0034] Fig. 9 The accompanying drawing is a schematic diagram of the flow chart of the flue gas switching state provided by the present invention.

[0035] in:

[0036] 1-furnace body;

[0037] 11-serpentine flue; 12-smoke inlet; 121-first smoke inlet; 122-second smoke inlet; 13-smoke exhaust port; 131-first smoke exhaust port; 132-second smoke exhaust port; 14-partition; 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; 32-smoke outlet switching cover; 33-bracket; 34-bidirectional driving motor; 35-driving gear; 36-rack;

[0042] 4-Main smoke inlet duct;

[0043] 41- first one-way valve;

[0044] 5- Main exhaust duct;

[0045] 51-circulation branch pipeline; 511-second one-way valve; 512-second solenoid valve; 52-first solenoid valve. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] See attached Figure 1 and 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; and further includes: a parameter detection module 2 and a parameter control module 3;

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

[0049] The parameter control module 3 is provided at the inlet 12 and the smoke exhaust port 13 of the furnace body 1. The serpentine flue 11 of the furnace body 1 is provided with the smoke inlet 12 and the smoke exhaust port 13 at both ends. Through the temperature state monitored by multiple groups of temperature monitoring units 21, the parameter control module 3 controls the opening and closing of the inlet 12 and the smoke exhaust port 13 so that the flue gas flow direction of the serpentine flue 11 can be switched.

[0050] In order to further optimize the above-mentioned technical solution, the multiple sets of temperature monitoring units 21 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 11 . 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] like Figure 2 As shown in the figure, if the smoke enters from the left side and exits from the right side, the left side is the high temperature monitoring area and the right side is the low temperature monitoring area. Figure 2 The following specific structural description is based on the simple furnace body 1 structure shown. As shown in the figure, the furnace body 1 forms a serpentine flue 11 through a partition 14.

[0052] Furthermore, a plurality of 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 must meet the following three conditions at the same time: ① The average temperature of the high-temperature monitoring zone exceeds the set average value of the high-temperature monitoring temperature 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 set maximum value of the high-temperature monitoring temperature; ③ After the low-temperature monitoring zone reaches the set average value of the low-temperature monitoring temperature, it continues to heat up within the set time.

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

[0055] This embodiment requires explanation of 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, and 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 the two sides of the partition 14 inside the furnace body 1, and the smoke exhaust port 13 includes a first smoke exhaust port 131 and a second smoke exhaust port 132, and 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 the two 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] A first slide 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 slide 15. A second slide 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 slide 16. A bracket 33 is fixed on 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 two-way driving motor 34 is fixed on the bracket 33, and a driving gear 35 is fixed on the power output end of the two-way driving motor 34. The edges corresponding to 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, so as to realize the opening and closing of the smoke inlet 12 and the smoke outlet 13 on both sides of the partition 14.

[0064] In order to further optimize the above technical solution, the parameter control module 3 controls the cigarette inlet 12 and the cigarette outlet 13 in such a way that the cigarette inlet 12 at one end of the serpentine flue 11 is opened and the cigarette outlet 13 is closed, and the cigarette outlet 13 at the other end of the serpentine flue 11 is opened and the cigarette inlet 12 is closed.

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

[0066] That is, when the first cigarette inlet 121 is closed, the second cigarette inlet 122 is opened, and at this time, the first cigarette outlet 131 is opened, and the second cigarette outlet 132 is closed. Similarly, when the first cigarette inlet 121 is opened, the second cigarette inlet is closed. At this time, the first cigarette outlet 131 is closed, and the second cigarette 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 correspondingly up and down, the four smoke outlets are all opened.

[0068] To further optimize the above technical solution, two cigarette inlets 12 are summarized in one general cigarette inlet pipe 4 , two cigarette outlets 13 are summarized in one general cigarette exhaust pipe 5 , and the main smoke exhaust pipe 5 has a circulation branch pipe 51 connecting the total smoke inlet pipe 4 .

[0069] like Figure 1 In order to avoid sliding of the smoke inlet switching cover 31 and the smoke outlet switching cover 32, the total smoke inlet pipe 4 and the total smoke exhaust pipe 5 have notes, which can be provided with corresponding telescopic baffles to block both sides with the sliding of the cover plate, and can also be blocked with a flexible material that is resistant to high temperature, which is not shown in the figure.

[0070] In order to further optimize the above technical solution, the parameter detection module 2 also includes a pressure monitoring unit 22 arranged in the middle of the serpentine flue 11 .

[0071] In order to further optimize the above technical solution, when the smoke flow direction is switched and the two smoke inlets 12 and the two smoke exhaust outlets 13 are in the switching middle position, the circulation branch pipe 51 is connected to the main smoke inlet pipe 4 to circulate the smoke inside the serpentine flue 11. At this time, the two smoke inlets 12 and the two smoke exhaust outlets 13 stop in the middle switching state, and when the pressure monitoring unit 22 reaches the pressure monitoring set value, the opening and closing actions of the smoke inlet 12 and the smoke exhaust outlet 13 continue.

[0072] For example, to meet the above operations, such as Figure 7 and Fig. 9 As shown, the main smoke inlet pipe 4 is provided with a first one-way valve 41 , the main smoke exhaust pipe 5 is provided with a first solenoid valve 52 , and the circulation branch pipe 51 is provided with a second one-way valve 511 and a second solenoid valve 512 .

[0073] See attached Figure 7 To Attachment Fig. 9 , under normal conditions, Fig. 9 Taking the first figure in FIG. 1 as an example, smoke enters from the second smoke inlet 122 and is discharged from the first smoke outlet 131. At this time, Figure 7 As shown, smoke enters from the main smoke inlet pipe 4 and passes through the first one-way valve 41. Fig. 9 The smoke is discharged from the main smoke exhaust pipe 5 after the direction shown by the arrow in the first figure. 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 satisfies the above three conditions, the bidirectional drive motor 34 is started to switch the cigarette port open and closed. Fig. 9 The second picture shows. At this time, the first solenoid valve 52 is closed, the second solenoid valve 512 is opened, and the smoke gas is not discharged, part of it flows into the bottom in the snake-shaped flue 11, and part of it flows back from the circulation branch pipe 51 through the two smoke exhaust ports 13 to the total smoke inlet pipe 4, such as Figure 8At this time, all four cigarette ports remain open, and the bidirectional drive motor 34 is turned off until the pressure monitoring unit 22 detects that the pressure reaches the set value, and the bidirectional drive motor 34 restarts to complete the switching, as shown in FIG. Fig. 9 As shown in the third picture.

[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, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0077] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may 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 rather to 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.

2. A boiler parameter control and monitoring system according to claim 1, characterized in that: 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); 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).

3. A boiler parameter control and monitoring system according to claim 2, characterized in that: The switching of the flue gas flow direction must simultaneously meet the following three conditions: ① The average temperature of the high temperature monitoring zone exceeds the set average value of the high temperature monitoring temperature 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 set maximum value of the high temperature monitoring temperature; ③ After the low temperature monitoring zone reaches the set average value of the low temperature monitoring temperature, it continues to heat up within the set time.

4. A boiler parameter control and monitoring system according to claim 3, characterized in that: The logical calculation relationship of the three conditions for switching the flue gas flow direction is: when any one of conditions ① and ② is met, the monitoring of condition ③ is started, and finally when all three conditions are met, switching is performed.

5. 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.

6. A boiler parameter control and monitoring system according to claim 5, 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.

7. A boiler parameter control and monitoring system according to claim 6, 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).

8. A boiler parameter control and monitoring system according to claim 7, characterized in that: The parameter detection module (2) further comprises a pressure monitoring unit (22) arranged in the middle of the serpentine flue (11).

9. A boiler parameter control and monitoring system according to claim 8, 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.

10. 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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