Heat accumulating type incinerator with automatic grading air distribution function

Abstract

The invention relates to the field of heat accumulating type incinerators, in particular to a heat accumulating type incinerator with an automatic grading air distribution function, and aims to solve the problems that in the continuous temperature change process of a heat accumulator, the oxidation temperature in a combustion chamber is difficult to stably control, so that heat is wasted, and the equipment safety is reduced. Comprising a heat accumulating type incinerator and a heat accumulating type incinerator control system capable of intelligently adjusting the air inlet speed. In the operation process of the heat accumulating type combustion furnace, comprehensive data collection is conducted on the combustion chamber temperature, the heat accumulating structure temperature and the air inlet speed of the heat accumulating type combustion furnace, deep analysis is conducted according to the collected data, therefore, the air inlet efficiency is judged, the air inlet speed is adjusted according to the judgment result, and the air inlet efficiency is improved. Deep coupling of the air inlet speed and the temperature of the heat storage structure in the operation process of the heat storage type incinerator is guaranteed, the combustion temperature is controlled while the combustion efficiency is guaranteed, and the conditions that the temperature is wasted and the equipment stability is damaged are avoided.

Description

Technical Field

[0001] The invention relates to the field of heat storage type incinerators, in particular to a heat storage type incinerator with an automatic graded air distribution function. Background Art

[0002] Volatile organic compounds are toxic and can easily destroy the atmospheric ozone layer, so high-temperature oxidation or incineration treatment technology is required for volatile organic compounds. According to their energy recovery methods, they can be divided into two main technologies: heat recovery oxidizer and heat storage regeneration high-temperature oxidation system. The heat recovery rate of heat recovery oxidizer is usually less than 70%, while the heat recovery rate of heat storage combustion furnace can be as high as 90% to 95%. It is known that when using heat storage combustion furnace, the heat storage material is a ceramic honeycomb structure. The high-temperature gas generated by oxidation flows through the ceramic heat storage body to heat it up and "storage heat", and is used to preheat the subsequent organic waste gas, thereby saving the waste gas heating fuel consumption;

[0003] At present, during the use of the regenerative incinerator in the prior art, the airflow direction needs to be reversed according to the temperature of the regenerative device, so that the exhaust heat absorbed by the regenerative device can be used for intake air preheating to improve the heat utilization efficiency. Therefore, for the regenerative incinerator, the temperature of its regenerative device is always in a dynamic change process. If a fixed air intake rate is used, the intake air preheating effect will be different when the regenerative device temperature is different, which will lead to different oxidation temperatures in the combustion chamber. In order to ensure the thoroughness of oxidation, it is often necessary to control it according to the oxidation temperature under the lowest condition, which leads to excessive oxidation temperature when the regenerative device temperature is high, so that the heat accumulation in the combustion chamber is too serious, resulting in equipment aging, excessive heat radiation, and incomplete exhaust heat recovery.

[0004] In view of the above technical problems, this application proposes a solution. Summary of the invention

[0005] The present invention collects comprehensive data on the combustion chamber temperature, heat storage structure temperature and air intake speed of the heat storage furnace during the operation of the heat storage furnace, conducts in-depth analysis based on the collected data, thereby judging the air intake efficiency, and adjusts the air intake speed according to the judgment result, thereby ensuring the deep coupling of the air intake speed and the temperature of the heat storage structure during the operation of the heat storage furnace, controlling the combustion temperature while ensuring the combustion efficiency, avoiding temperature waste and destroying the stability of the equipment, and solving the problem that it is difficult to stably control the oxidation temperature in the combustion chamber during the continuous change of the temperature of the heat storage device, resulting in heat waste and reduced equipment safety. A heat storage furnace with automatic graded air distribution function is proposed.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A regenerative incinerator with an automatic graded air distribution function comprises a combustion chamber, two sets of heat exchange bins are connected below the combustion chamber, both sets of heat exchange bins are provided with heat storage structures inside, and the bottoms of the two sets of heat exchange bins are connected to a reversing channel through a connecting pipe;

[0008] A reversing baffle is fixedly installed in the middle of the reversing channel, and the lower part and the upper part of the reversing channel are respectively connected to the exhaust gas outlet and the air intake channel;

[0009] The position where the air intake channel is connected to the reversing channel is connected through at least two groups of first electrically controlled valves, and the position where the exhaust gas outlet is connected to the reversing channel is connected through at least two groups of second electrically controlled valves;

[0010] Also included is a regenerative incinerator control system, which includes a combustion control unit, a combustion furnace central control unit, a regenerative device management unit and an intake and exhaust control unit;

[0011] The combustion control unit is used to obtain the combustion temperature in the combustion chamber;

[0012] The heat storage management unit is used to collect the temperature of the heat storage structure, obtain the heat exchange efficiency, and control the running direction;

[0013] The combustion furnace central control unit is used to analyze the combustion temperature, heat exchange efficiency and air intake speed, obtain the air intake efficiency, and generate an air intake speed control signal according to the air intake efficiency;

[0014] The air intake and exhaust control unit is used to control the air intake speed according to the signal of the combustion furnace central control unit.

[0015] As a preferred embodiment of the present invention, the heat storage management unit collects the temperatures of the two groups of heat storage structures respectively, obtains the temperatures of the two groups of heat storage structures, and compares the temperatures of the two groups of heat storage structures, records the heat storage structure with a higher temperature as the intake heat storage structure, and records the heat storage structure with a lower temperature as the exhaust heat storage structure;

[0016] The regenerator management unit compares the temperature of the intake regenerator with a preset threshold value. If the temperature of the intake regenerator is still higher than the preset threshold value, no reaction is made. If the temperature of the intake regenerator is lower than the preset threshold value, a reversing signal is generated and sent to the combustion furnace central control unit.

[0017] After obtaining the reversing signal, the combustion furnace central control unit controls the first electrically controlled valve and the second electrically controlled valve through the reversing signal, so that the opening and closing states of the first electrically controlled valve and the second electrically controlled valve are reversed.

[0018] As a preferred embodiment of the present invention, the heat accumulator management unit collects the temperatures of the intake heat accumulator and the exhaust heat accumulator, and records them in real time according to the collected temperatures. The temperature change rate is calculated by the real-time recorded temperature and the collection interval. The heat accumulator management unit records the temperature change rate of the intake heat accumulator as the temperature loss rate, and records the temperature of the exhaust heat accumulator as the heating rate.

[0019] As a preferred embodiment of the present invention, the heat accumulator management unit sends the temperature loss rate and the heating rate to the combustion furnace central control unit. The combustion furnace central control unit compares the temperature loss rate with the preset temperature loss rate to obtain the preheating efficiency, and compares the heating rate with the preset heating rate to obtain the recovery efficiency. The heat accumulator sends the preheating efficiency and the recovery efficiency to the combustion furnace central control unit.

[0020] As a preferred embodiment of the present invention, the combustion control unit monitors the temperature of the combustion chamber, obtains the combustion temperature, and proportionally calculates the combustion temperature and the set lower limit combustion temperature to obtain a combustion temperature ratio. The combustion control unit sends the combustion temperature ratio to the combustion furnace central control unit.

[0021] As a preferred embodiment of the present invention, the intake and exhaust control unit monitors the gas flow rate in the intake passage, obtains the intake flow rate, and sends the intake flow rate to the combustion furnace central control unit.

[0022] As a preferred embodiment of the present invention, the combustion furnace central control unit records the intake air flow rate as V, the preheating efficiency as EP, the recovery efficiency as ER, and the combustion temperature ratio as EF, and generates the intake air efficiency AP through formula analysis. The combustion furnace central control unit compares the intake efficiency AP with the preset efficiency threshold range. If the intake efficiency AP is greater than the maximum value in the preset intake efficiency threshold range, an intake acceleration signal is generated. If the intake efficiency AP is less than the minimum value in the preset intake efficiency threshold range, an intake deceleration signal is generated. If the intake efficiency AP is within the preset intake efficiency threshold range, an intake maintenance signal is generated.

[0023] As a preferred embodiment of the present invention, the combustion furnace sends an intake acceleration signal, an intake deceleration signal or an intake maintenance signal to the intake and exhaust control unit. The intake and exhaust control unit increases the intake speed in the intake channel through the intake acceleration signal, and reduces the intake speed in the intake channel through the intake deceleration signal. After obtaining the intake maintenance signal, the intake and exhaust control unit stops changing the intake speed in the intake channel and maintains the current intake speed.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. In the present invention, during the operation of the regenerative combustion furnace, comprehensive data collection is performed on the combustion chamber temperature, heat storage structure temperature and air intake speed of the regenerative combustion furnace, and in-depth analysis is performed based on the collected data to judge the air intake efficiency. The air intake speed is adjusted according to the judgment result, so as to achieve the purpose of adaptively adjusting the recent speed according to the change of the regenerative temperature, ensure the deep coupling of the air intake speed and the temperature of the heat storage structure during the operation of the regenerative incinerator, ensure the combustion efficiency while controlling the combustion temperature, and avoid temperature waste and damage to the stability of the equipment.

[0026] 2. In the present invention, the temperature of the heat accumulator is intelligently monitored, so that the airflow direction is intelligently adjusted according to the temperature of the heat accumulator, instead of changing the airflow direction at a fixed frequency, so that the temperature in the heat accumulator can be more properly utilized, so as to maximize the utilization of the heat accumulator temperature under different environments, avoid the situation where the heat accumulator temperature is insufficiently utilized or the heat accumulator temperature does not meet the standard and affects combustion and oxidation, and improve the environmental protection effect of exhaust emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0028] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0029] Figure 2 It is a cross-sectional structural schematic diagram of the present invention;

[0030] Figure 3 is a system block diagram of the present invention;

[0031] Figure 4 It is a system flow chart of the present invention.

[0032] In the figure: 1. heat exchange chamber; 2. combustion chamber; 3. connecting pipe; 4. exhaust gas outlet; 5. reversing channel; 6. air intake channel; 7. heat storage structure; 8. first electrically controlled valve; 9. second electrically controlled valve; 10. reversing partition. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. 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.

[0034] Embodiment 1:

[0035] See also Figure 1 - Figure 4 As shown, a regenerative incinerator with an automatic graded air distribution function comprises a combustion chamber 2, two sets of heat exchange bins 1 are connected below the combustion chamber 2, and heat storage structures 7 are arranged inside the two sets of heat exchange bins 1. The bottoms of the two sets of heat exchange bins 1 are connected with connecting pipes 3, and the bottom ends of the two sets of connecting pipes 3 are connected through a reversing channel 5;

[0036] A reversing baffle 10 is fixedly installed in the middle of the reversing channel 5, and the reversing baffle 10 divides the reversing channel 5 into two parts. The lower part of the reversing channel 5 is connected to the exhaust gas outlet 4, and the upper part of the reversing channel 5 is connected to the intake channel 6;

[0037] The position where the intake channel 6 is connected to the reversing channel 5 is communicated through at least two groups of first electrically controlled valves 8, and the multiple groups of first electrically controlled valves 8 are symmetrically distributed on both sides of the reversing partition 10, and the position where the exhaust gas outlet 4 is connected to the reversing channel 5 is connected through at least two groups of second electrically controlled valves 9, and the multiple groups of second electrically controlled valves 9 are also symmetrically distributed on both sides of the reversing partition 10;

[0038] The heat storage structure 7 can absorb the heat of the high-temperature exhaust gas discharged from the combustion chamber 2, and the other group of heat storage structures 7 can use the heat absorbed by themselves to preheat the cold exhaust gas passing through the heat storage structure 7. After the two groups of heat storage structures 7 have been running for a period of time, the airflow direction is changed through the first electrically controlled valve 8 and the second electrically controlled valve 9.

[0039] Embodiment 2:

[0040] See also Figure 1 - Figure 4 As shown, a regenerative incinerator with an automatic graded air distribution function also includes a regenerative incinerator control system, which includes a combustion control unit, a combustion furnace central control unit, a regenerative storage management unit and an intake and exhaust control unit;

[0041] The heat storage management unit numbers the two groups of heat storage structures 7 and records them as the first heat storage and the second heat storage. The heat storage management unit collects the temperatures of the first heat storage and the second heat storage, respectively, obtains the temperatures of the two groups of heat storage structures 7, and compares the temperatures of the two groups of heat storage structures 7. The heat storage structure 7 with a higher temperature is recorded as the intake heat storage, and the heat storage structure 7 with a lower temperature is recorded as the exhaust heat storage.

[0042] The regenerator management unit compares the temperature of the intake regenerator with a preset threshold value. If the temperature of the intake regenerator is still higher than the preset threshold value, no response is made. If the temperature of the intake regenerator is lower than the preset threshold value, a reversing signal is generated and sent to the combustion furnace central control unit.

[0043] After obtaining the reversing signal, the central control unit of the combustion furnace controls the first electrically-controlled valve 8 and the second electrically-controlled valve 9 through the reversing signal, so that the opening and closing states of the first electrically-controlled valve 8 and the second electrically-controlled valve 9 are reversed, wherein the opening and closing states of the first electrically-controlled valve 8 distributed on both sides of the reversing partition 10 are opposite, the opening and closing states of the second electrically-controlled valve 9 distributed on both sides of the reversing partition 10 are opposite, and the opening and closing states of the first electrically-controlled valve 8 and the second electrically-controlled valve 9 distributed on the same side of the reversing partition 10 are opposite.

[0044] Embodiment three:

[0045] See also Figure 1 - Figure 4 As shown, the heat accumulator management unit collects the temperatures of the intake heat accumulator and the exhaust heat accumulator, and records the collected temperatures in real time. The temperature change rate is calculated by the real-time recorded temperature and the collection interval. The heat accumulator management unit records the temperature change rate of the intake heat accumulator as the temperature loss rate, and records the temperature of the exhaust heat accumulator as the temperature rise rate;

[0046] The heat accumulator management unit sends the temperature loss rate and the temperature rise rate to the combustion furnace central control unit. The combustion furnace central control unit compares the temperature loss rate with the preset temperature loss rate to obtain the preheating efficiency, and compares the temperature rise rate with the preset temperature rise rate to obtain the recovery efficiency. The heat accumulator sends the preheating efficiency and the recovery efficiency to the combustion furnace central control unit.

[0047] The combustion control unit monitors the temperature of the combustion chamber 2, obtains the combustion temperature, and calculates the ratio of the combustion temperature to the set combustion lower limit temperature to obtain the combustion temperature ratio. The combustion control unit sends the combustion temperature ratio to the combustion furnace central control unit;

[0048] The intake and exhaust control unit monitors the gas flow rate in the intake passage 6, obtains the intake flow rate, and sends the intake flow rate to the combustion furnace central control unit;

[0049] The combustion furnace central control unit records the intake air flow rate as V, the preheating efficiency as EP, the recovery efficiency as ER, and the combustion temperature ratio as EF, and generates the intake air efficiency AP through formula analysis. The combustion furnace central control unit compares the air intake efficiency AP with the preset efficiency threshold range. If the air intake efficiency AP is greater than the maximum value in the preset air intake efficiency threshold range, an air intake acceleration signal is generated. If the air intake efficiency AP is less than the minimum value in the preset air intake efficiency threshold range, an air intake deceleration signal is generated. If the air intake efficiency AP is within the preset air intake efficiency threshold range, an air intake maintenance signal is generated.

[0050] The combustion furnace sends an intake acceleration signal, an intake deceleration signal or an intake maintenance signal to the intake and exhaust control unit. The intake and exhaust control unit increases the intake speed in the intake channel 6 through the intake acceleration signal, and reduces the intake speed in the intake channel 6 through the intake deceleration signal. After obtaining the intake maintenance signal, the intake and exhaust control unit stops changing the intake speed in the intake channel 6, thereby maintaining the current intake speed, so that the intake speed is matched with the operation of the heat storage incinerator, ensuring that the gas entering the heat storage incinerator is completely burned, making the exhausted exhaust more environmentally friendly.

[0051] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A regenerative heat incinerator with automatic graded air distribution function, characterized in that: It comprises a combustion chamber (2), two groups of heat exchange chambers (1) are connected below the combustion chamber (2), the two groups of heat exchange chambers (1) are provided with heat storage structures (7) inside, and the bottoms of the two groups of heat exchange chambers (1) are connected to the reversing channel (5) via a connecting pipe (3); A reversing baffle (10) is fixedly installed in the middle of the reversing channel (5), and the lower part and the upper part of the reversing channel (5) are respectively connected to the exhaust gas outlet (4) and the intake channel (6); The position where the air intake channel (6) is connected to the reversing channel (5) is connected via at least two groups of first electrically controlled valves (8), and the position where the exhaust gas outlet (4) is connected to the reversing channel (5) is connected via at least two groups of second electrically controlled valves (9); Also included is a regenerative incinerator control system, which includes a combustion control unit, a combustion furnace central control unit, a regenerative device management unit and an intake and exhaust control unit; The combustion control unit is used to obtain the combustion temperature in the combustion chamber (2); The heat storage management unit is used to collect the temperature of the heat storage structure (7), obtain the heat exchange efficiency, and control the running direction; The combustion furnace central control unit is used to analyze the combustion temperature, heat exchange efficiency and air intake speed, obtain the air intake efficiency, and generate an air intake speed control signal according to the air intake efficiency; The air intake and exhaust control unit is used to control the air intake speed according to the signal of the combustion furnace central control unit.

2. A regenerative heat incinerator with automatic graded air distribution function according to claim 1, characterized in that: The heat storage management unit collects the temperatures of the two groups of heat storage structures (7) respectively, obtains the temperatures of the two groups of heat storage structures (7), compares the temperatures of the two groups of heat storage structures (7), records the heat storage structure (7) with a higher temperature as an intake heat storage structure, and records the heat storage structure (7) with a lower temperature as an exhaust heat storage structure; The regenerator management unit compares the temperature of the intake regenerator with a preset threshold value. If the temperature of the intake regenerator is still higher than the preset threshold value, no reaction is made. If the temperature of the intake regenerator is lower than the preset threshold value, a reversing signal is generated and sent to the combustion furnace central control unit. After obtaining the reversing signal, the combustion furnace central control unit controls the first electrically controlled valve (8) and the second electrically controlled valve (9) through the reversing signal, so that the opening and closing states of the first electrically controlled valve (8) and the second electrically controlled valve (9) are reversed.

3. The regenerative heat incinerator with automatic graded air distribution function according to claim 1, characterized in that: The heat accumulator management unit collects the temperatures of the intake heat accumulator and the exhaust heat accumulator, and records them in real time based on the collected temperatures. The temperature change rate is obtained by calculation based on the real-time recorded temperatures and the collection interval. The heat accumulator management unit records the temperature change rate of the intake heat accumulator as the temperature loss rate, and records the temperature of the exhaust heat accumulator as the heating rate.

4. The regenerative heat incinerator with automatic graded air distribution function according to claim 3 is characterized in that: The heat accumulator management unit sends the temperature loss rate and the heating rate to the combustion furnace central control unit. The combustion furnace central control unit compares the temperature loss rate with the preset temperature loss rate to obtain the preheating efficiency, and compares the heating rate with the preset heating rate to obtain the recovery efficiency. The heat accumulator sends the preheating efficiency and the recovery efficiency to the combustion furnace central control unit.

5. The regenerative heat incinerator with automatic graded air distribution function according to claim 4, characterized in that: The combustion control unit monitors the temperature of the combustion chamber (2), obtains the combustion temperature, and calculates the ratio of the combustion temperature to the set combustion lower limit temperature to obtain a combustion temperature ratio. The combustion control unit sends the combustion temperature ratio to the combustion furnace central control unit.

6. The regenerative heat incinerator with automatic graded air distribution function according to claim 5, characterized in that: The intake and exhaust control unit monitors the gas flow rate in the intake passage (6), obtains the intake flow rate, and sends the intake flow rate to the combustion furnace central control unit.

7. The regenerative heat incinerator with automatic graded air distribution function according to claim 6, characterized in that: The combustion furnace central control unit records the intake air flow rate as V, the preheating efficiency as EP, the recovery efficiency as ER, and the combustion temperature ratio as EF, and generates the intake air efficiency AP through formula analysis. The combustion furnace central control unit compares the intake efficiency AP with the preset efficiency threshold range. If the intake efficiency AP is greater than the maximum value in the preset intake efficiency threshold range, an intake acceleration signal is generated. If the intake efficiency AP is less than the minimum value in the preset intake efficiency threshold range, an intake deceleration signal is generated. If the intake efficiency AP is within the preset intake efficiency threshold range, an intake maintenance signal is generated.

8. The regenerative heat incinerator with automatic graded air distribution function according to claim 1, characterized in that: The combustion furnace sends an intake acceleration signal, an intake deceleration signal or an intake maintenance signal to an intake and exhaust control unit. The intake and exhaust control unit increases the intake speed in the intake channel (6) through the intake acceleration signal and reduces the intake speed in the intake channel (6) through the intake deceleration signal. After obtaining the intake maintenance signal, the intake and exhaust control unit stops changing the intake speed in the intake channel (6) and maintains the current intake speed.

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