Cremation machine tail gas waste heat recycling system

Abstract

The utility model relates to the technical field of funeral and interment corollary equipment, in particular to a tail gas waste heat recycling system of a cremation machine. The recycling system comprises a heat conduction exchange device located on a cremation machine tail gas pipeline, and the heat conduction exchange device, a radiator, a hydrogen production machine heating tank and a circulating pump form a closed-loop oil way in sequence through oil pipes. The waste heat recovery system has the beneficial effects that the waste heat recovery system is used for recovering heat of tail gas generated after combustion of the cremation machine to heat the heating tank of the hydrogen production machine, energy can be effectively saved, the cremation cost is reduced, and the heat transfer efficiency of the tail gas to the heat exchange module is improved by adopting a plurality of bent S-shaped pipelines connected in series in the heat exchange module in the heat exchange chamber; the temperature monitoring device is matched with the radiator to avoid hydrogen production activity stop caused by overheating or too low temperature, and the check valve is used for preventing heat conduction oil from flowing back, so that the operation stability of the whole cremation system is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of funeral supporting equipment, and specifically to a system for recovering and reusing waste heat from exhaust gas of a cremator. Background Art

[0002] Most traditional cremators use kerosene as their combustion raw material. The exhaust gas after combustion contains harmful gases and particulate matter, such as carbon monoxide, sulfur dioxide, nitrogen oxides and fine smoke. These harmful substances will pollute the atmospheric environment, cause the air quality to deteriorate, affect people's respiratory health, and even increase the risk of respiratory and cardiovascular diseases. In addition, the exhaust gas also contains huge heat, which will cause energy waste.

[0003] The improved cremator uses methanol to produce hydrogen, replacing kerosene combustion with hydrogen combustion, which greatly reduces the emission of pollutants after combustion. However, the tail gas still contains a lot of heat, which will be wasted if not effectively utilized. For this reason, a system for recovering and reusing the waste heat from the tail gas of the cremator is designed, which uses the heat in the tail gas after combustion to heat the hydrogen generator to recover heat and maintain the operation of the hydrogen generator. In addition, the traditional waste heat recovery device also has problems such as unstable temperature control and low heat conduction efficiency.

[0004] The purpose of the utility model is to provide a system for recovering and reusing the waste heat of the exhaust gas from the cremator, in which the exhaust gas after combustion in the cremator is recovered through the waste heat recovery system to heat the heating tank in the hydrogen generator, so as to solve the problems of insufficient utilization of the heat of the exhaust gas in the above-mentioned traditional cremator, the difficulty in controlling the heat transfer in the traditional waste heat conversion device and the low heat conduction efficiency. Utility Model Content

[0005] The purpose of the utility model is to provide a system for recovering and reusing the waste heat of the exhaust gas of the cremator. The waste heat recovery system is used to recover the heat of the exhaust gas after combustion in the cremator and use it to heat the heating tank of the hydrogen production machine, which can effectively save energy and reduce the cost of cremation. The series-connected serpentine pipes in the heat exchange module in the heat exchange chamber adopt multiple bends to improve the heat transfer efficiency of the exhaust gas to the heat exchange module. The temperature monitoring device is used in conjunction with the radiator to avoid stopping the hydrogen production activity caused by overheating or too low temperature, and the check valve prevents the backflow of heat transfer oil, so as to improve the operating stability of the overall cremation system.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A system for recovering and reusing waste heat from tail gas of a cremator: the recycling system comprises a heat exchange device located on the tail gas pipeline of the cremator, the heat exchange device is connected to a radiator, a heating tank of a hydrogen generator and a circulating pump in sequence through an oil pipe to form a closed-loop oil circuit;

[0008] The heat transfer oil in the heat transfer exchange device flows through the radiator along the oil pipe, then passes through the check valve and the oil inlet into the hydrogen generator heating tank, flows out from the oil outlet at the bottom of the hydrogen generator heating tank, enters the circulation pump, and then flows back into the heat transfer exchange device;

[0009] The side wall of the hydrogen generator heating tank is provided with a temperature monitoring module;

[0010] The radiator, temperature monitoring module and circulating pump are all controlled by a PLC electronic control module.

[0011] Preferably, the inner cavity of the heat exchange device is divided into a purification chamber, a heat exchange chamber and a particulate matter adsorption chamber from top to bottom in sequence by transversely arranged partitions A and B, a heat exchange chamber is provided with a heat exchange module, an exhaust gas purification module is provided in the purification chamber, and an activated carbon adsorption plate is provided in the particulate matter adsorption chamber.

[0012] Preferably, a smoke outlet pipe is provided on the top of the heat exchange device, and the purification chamber, heat exchange chamber and particulate matter adsorption chamber respectively circulate gas through smoke outlet A and smoke outlet B provided on partition A and partition B, and a smoke inlet is provided on one side outer wall of the particulate matter adsorption chamber.

[0013] Preferably, the heat exchange module comprises a plurality of groups of serially connected serpentine pipes transversely arranged in the heat exchange chamber, and two ends of the heat exchange module respectively pass through the outer walls of both sides of the heat exchange device and are connected with the oil pipeline.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model connects the cremator and the hydrogen generator through a waste heat recovery system. When the cremator is working, the tail gas in the heat exchange chamber is heat-exchanged through the heat exchange module and transferred to the hydrogen generator's own heating device for auxiliary heating, which can effectively save energy and reduce cremation costs.

[0016] 2. The utility model adopts a waste heat recovery system to recover the heat of the exhaust gas after combustion in the cremator. When the exhaust gas enters the heat exchange device, the exhaust gas in the heat exchange chamber heats the heat exchange module. The series serpentine pipeline in the heat exchange module adopts multiple bends to extend the transportation path of the heat transfer oil in the heat exchange chamber, which increases the residence time of the heat transfer oil in the heat exchange chamber in the exhaust gas pipeline of the cremator, thereby improving the heat transfer efficiency of the exhaust gas to the heat exchange module.

[0017] 3. The utility model uses an activated carbon adsorption plate at the bottom of the heat exchange device to first filter the particulate matter in the exhaust gas to avoid the particulate matter in the exhaust gas in the heat exchange chamber adhering to the heat exchange module and causing the heat exchange efficiency to decrease. When the exhaust gas after the heat exchange is completed enters the purification chamber to complete the removal of harmful gases, the heat exchange efficiency can be improved.

[0018] 4. The utility model is provided with a temperature monitoring module on the heating tank of the hydrogen generator to monitor the temperature of the heating tank at any time, and cooperates with the radiator to keep the temperature of the heating tank stable at all times, so as to efficiently maintain the working operation of the heating tank and avoid hydrogen production stop caused by overheating or too low temperature. In addition, a check valve is installed between the heating tank of the hydrogen generator and the radiator to prevent unstable heating of the heating tank caused by reflux of heat transfer oil, thereby helping the stable operation of the hydrogen production device.

[0019] In summary, the utility model is a system for recovering and reusing waste heat from exhaust gas of a cremator. The waste heat recovery system is used to recover the heat of the exhaust gas after combustion in the cremator for heating the heating tank of the hydrogen generator, which can effectively save energy and reduce the cost of cremation. The serpentine pipes connected in series in the heat exchange module in the heat exchange chamber adopt multiple bends to improve the heat transfer efficiency of the exhaust gas to the heat exchange module. The temperature monitoring device is used in conjunction with the radiator to avoid stopping the hydrogen production activity due to overheating or low temperature. The check valve prevents the backflow of heat transfer oil, and the temperature of the entire system is accurately controlled to achieve the optimal heat exchange and heat utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a system diagram for recovering and reusing waste heat from the tail gas of a cremator according to the utility model;

[0021] Figure 2 It is a cross-sectional view of the heat exchange device of the utility model;

[0022] In the figure: heat transfer device 1; heat exchange chamber 101; purification chamber 102; particulate matter adsorption chamber 103; smoke inlet 104; smoke outlet A105; smoke outlet B106; smoke outlet pipe 107; heat exchange module 108; activated carbon adsorption plate 109; exhaust gas purification module 110; partition A111; partition B112; radiator 2; hydrogen generator heating tank 3; temperature monitoring module 301; oil inlet 302; oil outlet 303; circulation pump 4; PLC electronic control module 5; check valve 6. DETAILED DESCRIPTION

[0023] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] For the purpose of simplicity and illustration, the principles of the embodiments are mainly described by reference to examples. In the following description, many specific details are proposed to provide a thorough understanding of the embodiments. However, it is obvious that for those of ordinary skill in the art, these embodiments may not be limited to these specific details in practice. In some instances, known methods and structures are not described in detail to avoid making these embodiments unnecessarily difficult to understand. In addition, all embodiments can be used in combination with each other.

[0025] Please refer to the attached drawings, the utility model provides a technical solution:

[0026] A system for recovering and reusing waste heat from exhaust gas of a cremator: the recycling system comprises a heat exchange device 1 located on the exhaust gas pipeline of the cremator, the heat exchange device 1 is connected to a radiator 2, a heating tank 3 of a hydrogen generator and a circulating pump 4 in sequence through an oil pipe to form a closed-loop oil circuit;

[0027] The heat transfer oil in the heat transfer exchange device 1 flows through the radiator 2 along the oil pipe, and then enters the hydrogen generator heating tank 3 through the check valve 6 and the oil inlet 302, flows out from the oil outlet 303 at the bottom of the hydrogen generator heating tank 3, enters the circulation pump 4, and then flows back into the heat transfer exchange device 1. The check valve can prevent the heating tank from being unstable due to the reflux of the heat transfer oil, and help the stable operation of the hydrogen generator;

[0028] The side wall of the hydrogen generator heating tank 3 is provided with a temperature monitoring module 301, which monitors the temperature of the heating tank at any time and cooperates with the radiator to keep the temperature of the heating tank stable at all times, so as to efficiently maintain the working operation of the heating tank and avoid hydrogen production stopping caused by overheating or too low temperature;

[0029] The radiator 2 , the temperature monitoring module 301 and the circulation pump 4 are all controlled by the PLC electronic control module 5 .

[0030] Furthermore, the inner cavity of the heat exchange device 1 is divided into a purification chamber 102, a heat exchange chamber 101 and a particulate matter adsorption chamber 103 from top to bottom by transversely arranged partitions A111 and B112. A heat exchange module 108 is arranged in the heat exchange chamber 101, an exhaust gas purification module 110 is arranged in the purification chamber 102, and an activated carbon adsorption plate 109 is arranged in the particulate matter adsorption chamber 103. When the crematorium is working, the exhaust gas in the heat exchange chamber is heat-exchanged through the heat exchange module and is transferred to the hydrogen generator's own heating device for auxiliary heating, which can effectively save energy and reduce cremation costs.

[0031] Furthermore, a smoke outlet pipe 107 is provided at the top of the heat exchange device 1, and the purification chamber 102, the heat exchange chamber 101 and the particulate adsorption chamber 103 respectively circulate gas through the smoke outlet A105 and the smoke outlet B106 provided on the partition A111 and the partition B112, and a smoke inlet 104 is provided on the outer wall of one side of the particulate adsorption chamber 103.

[0032] Furthermore, the heat exchange module 108 includes a plurality of groups of serially connected serpentine pipes transversely arranged in the heat exchange chamber 101. The two ends of the heat exchange module 108 respectively pass through the outer walls of the heat exchange device 1 on both sides and are connected to the oil pipeline. When the exhaust gas enters the heat exchange device, the exhaust gas in the heat exchange chamber heats the heat exchange module. The serially connected serpentine pipes in the heat exchange module adopt a plurality of bends, which extend the transportation path of the heat transfer oil in the heat exchange chamber, increase the residence time of the heat transfer oil in the heat exchange chamber in the exhaust pipe of the crematorium, and improve the heat transfer efficiency of the exhaust gas to the heat exchange module.

[0033] Working principle:

[0034] When the cremator starts working, the exhaust gas generated flows from the exhaust gas pipeline of the cremator through the heat exchange device. The high-temperature exhaust gas heats the heat transfer oil in several groups of series-connected serpentine pipes arranged in the heat exchange chamber of the heat exchange device. At the same time, the circulating pump is turned on, and the heat transfer oil begins to circulate in the oil pipe. The heat transfer oil heated by the exhaust gas flows into the hydrogen generator heating tank 3 through the radiator 2 and the check valve 6 in turn, providing heat for the hydrogen generator to maintain the normal reaction of the hydrogen production system. The heat transfer oil that has undergone heat exchange flows out from the oil outlet 303 at the bottom of the hydrogen generator heating tank 3, enters the circulating pump 4, and then flows back into the heat exchange device 1. The heat transfer oil contacts the exhaust gas of the cremator for the second time and continues to be heated.

[0035] When the temperature monitoring module 301 on the hydrogen generator heating tank 3 detects that the temperature inside the hydrogen generator heating tank 3 is too high, the start and stop and speed of the radiator 2 are controlled by the PLC electronic control module 5, and the oil pipe is precisely controlled to dissipate air, thereby controlling the temperature of the heat transfer oil flowing into the hydrogen generator heating tank 3; when the hydrogen generator stops working, the waste heat recovery and reuse system continues to be driven by the circulation pump 4 to circulate, so as to avoid damage caused by excessive local expansion pressure when the local temperature of the heat transfer oil in the oil circuit is too high. When the temperature monitoring module 301 on the hydrogen generator heating tank 3 detects that its temperature is lower than the preset temperature, the circulation pump 4 is controlled to be closed through the PLC electronic control module 5, and the entire system stops working.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A system for recovering and reusing waste heat from tail gas of a cremator, characterized in that: The recycling system comprises a heat exchange device (1) located on the exhaust gas pipeline of the cremator, wherein the heat exchange device (1) is connected with a radiator (2), a heating tank of a hydrogen generator (3) and a circulation pump (4) in sequence through an oil pipe to form a closed-loop oil circuit; The heat transfer oil in the heat transfer exchange device (1) flows through the radiator (2) along the oil pipe, then passes through the check valve (6) and the oil inlet (302) to enter the hydrogen generator heating tank (3), flows out from the oil outlet (303) at the bottom of the hydrogen generator heating tank (3), enters the circulation pump (4), and then flows back into the heat transfer exchange device (1); The side wall of the hydrogen generator heating tank (3) is provided with a temperature monitoring module (301); The radiator (2), the temperature monitoring module (301) and the circulation pump (4) are all controlled by a PLC electric control module (5).

2. A system for recovering and reusing waste heat from tail gas of a cremator as claimed in claim 1, characterized in that: The inner cavity of the heat exchange device (1) is divided into a purification chamber (102), a heat exchange chamber (101) and a particulate matter adsorption chamber (103) from top to bottom in sequence by a transversely arranged partition A (111) and a partition B (112); a heat exchange module (108) is arranged in the heat exchange chamber (101), an exhaust gas purification module (110) is arranged in the purification chamber (102), and an activated carbon adsorption plate (109) is arranged in the particulate matter adsorption chamber (103).

3. A system for recovering and reusing waste heat from tail gas of a cremator as claimed in claim 2, characterized in that: The heat exchange device (1) is provided with a smoke outlet pipe (107) at the top, and the purification chamber (102), the heat exchange chamber (101) and the particle adsorption chamber (103) respectively circulate gas through a smoke outlet A (105) and a smoke outlet B (106) provided on a partition A (111) and a partition B (112), and a smoke inlet (104) is provided on an outer wall surface of one side of the particle adsorption chamber (103).

4. A system for recovering and reusing waste heat from tail gas of a cremator as claimed in claim 2, characterized in that: The heat exchange module (108) comprises a plurality of groups of serially connected serpentine pipelines arranged transversely in the heat exchange chamber (101); the two ends of the heat exchange module (108) respectively pass through the outer walls of the heat exchange device (1) on both sides and are connected to the oil pipeline.

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