Cremation machine kang surface cooling device and method

Abstract

The embodiment of the invention provides a kang surface cooling device and method for a cremation machine, and relates to the technical field of environment-friendly funeral and interment. The device comprises a cooling channel which is arranged on a heatable brick bed surface, and the inlet end of the cooling channel is a conical opening expanding outwards; the main nozzle is used for spraying cooling airflow into the cooling channel; the auxiliary nozzle is used for spraying cooling airflow to the inner wall area of the conical opening, and the auxiliary nozzle and the conical opening do not make contact with the inner wall of the conical opening; the pressure detection module is used for acquiring the pressure in the conical opening in real time; the control module is used for adjusting the airflow ratio according to the pressure, so that the pressure in the conical opening is equal to the preset atmospheric pressure. According to the kang surface cooling device of the cremation machine, high-speed airflow is jetted into the cooling channel through the main nozzle to form local negative pressure, annular airflow is jetted into the inner wall area of the conical opening of the auxiliary nozzle to form a positive pressure air curtain, and the net static pressure of the area is maintained at the ambient atmospheric pressure level by adjusting the airflow ratio of the main nozzle to the auxiliary nozzle; therefore, air pressure sealing is achieved.

Description

Technical Field

[0001] This invention relates to the field of green and environmentally friendly funeral technology, and in particular to a cooling device and method for the surface of a crematorium. Background Technology

[0002] Cremation machines, as key equipment in the funeral industry, primarily function to incinerate remains at high temperatures. After cremation, the surface of the kang (heated platform) supporting the body remains remains extremely hot due to prolonged exposure to high temperatures. It typically requires a considerable period of natural cooling to reach a temperature suitable for safe handling and ash retrieval by staff. This cooling process severely limits the continuous operation capacity of the cremation machine, especially during periods of high demand and dense cremation schedules.

[0003] To improve the working efficiency of cremation machines, existing technologies have attempted to introduce active cooling methods, such as pre-setting cooling channels inside the kang (heated brick bed) structure and forcibly introducing low-temperature air or cooling airflow containing atomized water into these channels through an external air supply system to accelerate the cooling of the kang surface.

[0004] However, in practical applications, the above-mentioned cooling method has significant technical challenges: the surface of the cremator is under extreme high temperature and frequent hot and cold cycles for a long time, and thermal deformation is inevitable. This small but continuously accumulated deformation will cause the inlet position of the cooling channel on the surface to shift, making it difficult to maintain a stable and precise connection with the fixed external cooling gas supply pipe.

[0005] When the connection is not tight, gaps can easily form at the interface. On the one hand, if a large amount of cooling air leaks from this gap, it will not only waste the cooling medium and reduce cooling efficiency, but may also pose a safety or health risk to on-site operators due to the leakage of high-temperature gas or atomized water vapor. On the other hand, if the cooling air forms a local negative pressure at the gap during high-speed flow, it will draw in ambient air, dilute the concentration of the cooling medium, weaken the cooling effect, and may even introduce oxygen to support combustion residues, creating safety hazards. Summary of the Invention

[0006] To address the technical problem in existing technologies where thermal deformation of the cremator surface under high-temperature conditions leads to a lack of precise sealing between the cooling channel inlet and the external cooling gas supply pipe, resulting in gaps, cooling medium leakage, and reduced cooling efficiency, this invention provides a cremator surface cooling device and method. The technical solution is as follows:

[0007] This invention provides a cooling device for the surface of a cremator, comprising:

[0008] A cooling channel is provided on the kang surface, and the inlet end of the cooling channel is a tapered opening that widens outwards;

[0009] The nozzle assembly includes a main nozzle and a secondary nozzle; the main nozzle is used to spray cooling airflow into the interior of the cooling channel, and the secondary nozzle is used to spray cooling airflow into the inner wall region of the conical opening, and neither the main nozzle nor the secondary nozzle contacts the inner wall of the conical opening;

[0010] The pressure detection module is used to acquire the pressure inside the conical opening in real time;

[0011] The control module is used to adjust the air flow rate of the main nozzle and the auxiliary nozzle according to the acquired pressure, so that the pressure inside the conical opening is equal to the preset atmospheric pressure.

[0012] Optionally, the secondary nozzle is sleeved on the outer periphery of the main nozzle, and the nozzle head of the main nozzle extends out of the nozzle opening of the secondary nozzle.

[0013] Optionally, the nozzle diameter of the secondary nozzle is greater than the inner diameter of the conical opening and less than the outer diameter of the conical opening; the nozzle diameter of the main nozzle is less than the inner diameter of the conical opening; the nozzle of the main nozzle is located at the inner end face of the conical opening; and the nozzle of the secondary nozzle is located at the outer end face of the conical opening.

[0014] Optionally, the cooling device further includes: a cold source system and an airflow distributor; the air inlet of the airflow distributor is connected to the air outlet of the cold source system; the first air outlet of the airflow distributor is connected to the main nozzle through a first pipe, and the second air outlet of the airflow distributor is connected to the auxiliary nozzle through a second pipe.

[0015] Optionally, both the first pipe and the second pipe are equipped with regulating valves; the control module is electrically connected to the pressure detection module and the regulating valve respectively, and the control module is used to adjust the opening of the regulating valve according to the obtained pressure so that the pressure in the conical opening is equal to the preset atmospheric pressure.

[0016] Optionally, the cooling device further includes a moving mechanism configured to move the nozzle assembly along a preset direction so that the nozzle orifice of the main nozzle and the nozzle orifice of the auxiliary nozzle are inserted into or removed from the conical opening of the cooling channel.

[0017] Optionally, the moving mechanism includes: a moving component disposed on the secondary nozzle; the moving component is a wheel or track for rolling or traveling on a support surface to drive the secondary nozzle assembly to move; or

[0018] The moving mechanism includes a slide rail and a slide table; the slide rail is arranged along the central axis of the conical opening; the slide table is fixedly connected to the nozzle assembly and slides in cooperation with the slide rail.

[0019] Optionally, the cooling airflow is low-temperature air with a temperature below 20°C or an airflow containing atomized coolant.

[0020] Optionally, the cooling channel includes: a first channel and a second channel; the first channel and the second channel are connected by a plurality of parallel branches; the first channel has the conical opening at its inlet end.

[0021] This invention also provides a method for cooling the surface of a cremator, utilizing the aforementioned cooling device for the surface of a cremator; the method includes:

[0022] Cooling airflow is injected into the cooling channel through the main nozzle, and cooling airflow is injected into the inner wall area of ​​the cone-shaped opening of the cooling channel through the auxiliary nozzle.

[0023] Real-time pressure monitoring of the conical opening;

[0024] Adjust the air flow rate supplied by the main nozzle and the auxiliary nozzle according to the obtained pressure, so that the pressure inside the conical opening is equal to the preset atmospheric pressure.

[0025] The beneficial effects of the technical solutions provided in the embodiments of the present invention include at least the following:

[0026] This invention utilizes a main nozzle to inject high-speed airflow into the cooling channel, creating a localized negative pressure within the channel through the Venturi effect. Simultaneously, a secondary nozzle injects annular airflow into the inner wall region of the conical opening at the entrance of the cooling channel, forming a positive pressure air curtain. The control module dynamically adjusts the cooling airflow ratio between the main and secondary nozzles based on real-time feedback from the pressure detection module regarding the static pressure at the conical opening. This ensures that the net static pressure in this area is precisely maintained at the ambient atmospheric pressure level, achieving a dynamic equilibrium state where the net pressure approaches zero. In this state, there is no leakage of cooling medium or intake of ambient air at the conical opening, effectively preventing the loss of cooling airflow and dilution of the cooling medium by external air, significantly improving cooling efficiency. This invention uses a controllable airflow to construct a "pressure seal" mechanism, replacing the traditional rigid sealing method that relies on mechanical contact. This fundamentally solves the technical problem of difficulty in accurately connecting the cooling channel inlet and the external air supply pipeline due to thermal deformation of the kang surface under high-temperature conditions, leading to gaps and leaks. Experiments show that, under the condition of an initial temperature of about 850°C, the cooling time using the device of this invention is shortened by more than 70% compared with natural cooling, and there is no visible airflow leakage or dust phenomenon during the process; the pressure closed-loop control increases the utilization rate of the cooling medium to more than 95%, which not only greatly improves the equipment turnover efficiency, but also significantly improves the safety and cleanliness of the operating environment. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of a cremator cooling device for a cremator provided in an embodiment of the present invention;

[0029] Figure 2 This is a partial structural block diagram of a cremator cooling device for a cremator provided in another embodiment of the present invention.

[0030] Figure label:

[0031] 101-Main nozzle; 102-Secondary nozzle; 201-Conical opening; 202-First channel; 203-Second channel; 204-Branch; 300-Pressure detection module; 400-Control module; 501-Cold source system; 502-Airflow distributor; 503-First pipe; 504-Second pipe; 505-Regulating valve; 600-Moving mechanism; 700-Kang surface. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0033] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an,” “a,” or “the,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising,” “including,” or “including,” and similar terms mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. The terms “connected,” “linked,” or “connected,” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0034] It should be noted that the "upper", "lower", "left", "right", "front" and "rear" used in the present invention are only used to represent relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0035] As Figures 1 to 2 shown, the present invention provides a cooling device for the cremator hearth surface, which is used to quickly, safely and efficiently cool the high-temperature hearth surface 700 after the cremation operation.

[0036] The cooling device for the cremator hearth surface includes: a cooling channel, a nozzle assembly, a pressure detection module 300 and a control module 400.

[0037] The cooling channel is integrally arranged inside the cremator hearth surface 700 and is integrally formed or embedded by high-temperature resistant refractory materials. As Figure 2 shown, the cooling channel includes a first channel 202, a second channel 203 and a plurality of branch channels 204 arranged in parallel. The first channel 202 and the second channel 203 extend transversely along the hearth surface 700, and the plurality of branch channels 204 are vertically connected to the two to form a grid-like or comb-like flow channel structure to achieve uniform heat exchange.

[0038] The inlet end of the cooling channel, that is, one end of the first channel 202, serves as the cooling medium inlet, and its end is processed into a tapered opening 201 that gradually expands outward. The inner diameter D1 of the tapered opening 201 refers to the minimum inner diameter at the connection with the main body of the first channel 202, and its outer diameter D2 refers to the maximum inner diameter of the outermost opening.

[0039] The nozzle assembly includes a main nozzle 101 and a sub-nozzle 102 arranged coaxially. The sub-nozzle 102 is of an annular sleeve structure and is sleeved on the outer periphery of the main nozzle 101.

[0040] The main nozzle 101 is a straight pipe, and its nozzle diameter d1 satisfies: d1 < D1, and the front end of its nozzle extends out of the nozzle of the sub-nozzle 102. The nozzle diameter d2 of the sub-nozzle 102 satisfies: D1 < d2 < D2.

[0041] During operation, the nozzle of the main nozzle 101 is located at the inner end face of the tapered opening 201 (i.e., the position close to the inlet of the first channel 202), and the nozzle of the sub-nozzle 102 is facing the outer end face area of the tapered opening 201. Both are kept in a non-contact state with the inner wall of the tapered opening 201, leaving a certain gap, about 5 - 20 mm, to avoid collision or jamming with the nozzle when the hearth surface 700 is deformed due to high temperature.

[0042] In some embodiments, the kang (heated brick bed) surface cooling device for the cremator further includes a cold source system 501 and an airflow distributor 502. The cold source system 501 can be a combination of a refrigeration unit and a fan, or a compressed air and atomized water mixing device, outputting low-temperature air with a temperature below 20°C, or atomized cooling airflow containing micron-sized water droplets. On the one hand, a large temperature difference is formed between the low-temperature air and the kang surface 700, which reaches a temperature of over 800°C, serving as the main driving force for heat transfer and effectively enhancing convective heat transfer. Compared with ambient temperature air cooling (30~40°C), the cooling time can be shortened by more than 30%. On the other hand, the atomized water droplets evaporate rapidly in the high-temperature environment, absorbing a large amount of latent heat of vaporization, achieving a cooling effect far exceeding that of simple sensible heat transfer through a phase change process.

[0043] The airflow distributor 502 is an integrated airflow block, with its inlet connected to the outlet of the cold source system 501 via a high-temperature resistant hose. The airflow distributor 502 has two independent flow channels, leading to a first outlet and a second outlet respectively. The first outlet is connected to the inlet of the main nozzle 101 via a first pipe 503, and the second outlet is connected to the inlet of the auxiliary nozzle 102 via a second pipe 504. Electric proportional regulating valves 505 are installed on both the first pipe 503 and the second pipe 504 to precisely control the flow rates of the two airflow paths.

[0044] A miniature pressure sensor is installed on the outer wall of the secondary nozzle 102 near the nozzle opening as a pressure detection module 300, which is used to detect the static pressure value near the inner wall of the conical opening 201 in real time.

[0045] The pressure sensor is electrically connected to the control module 400, which in turn connects to two regulating valves 505. The control module 400 has a preset target pressure value of the local ambient atmospheric pressure, which can be calibrated in real time using an atmospheric pressure sensor. It should be noted that the control module 400 includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When executed by the processor, the computer program causes the processor to perform regulation commands.

[0046] When the pressure sensor detects in real time that the pressure at the conical opening 201 is lower than the ambient atmospheric pressure (i.e., a negative pressure occurs), it indicates that the high-speed jet ejection effect of the main nozzle 101 is too strong, causing a local vacuum effect in this area, which may draw in ambient air from the gap. This will not only dilute the concentration of the cooling medium and reduce the heat exchange efficiency, but may also introduce oxygen to fuel the combustion of residual combustibles, posing a safety hazard. At this time, the control module 400 responds immediately, automatically reducing the cooling airflow of the main nozzle 101 or increasing the airflow output of the auxiliary nozzle 102 through the regulating valve 505, so as to enhance the positive pressure air curtain formed at the outer edge of the conical opening 201, thereby counteracting the excessive negative pressure.

[0047] Conversely, if the pressure sensor detects that the pressure at the conical opening 201 is higher than atmospheric pressure (i.e., positive pressure), it indicates that the airflow output of the secondary nozzle 102 is relatively too strong, or that the main nozzle 101 is insufficiently ejecting air, causing the cooling airflow to leak outward from the opening. This not only wastes cooling medium and reduces energy efficiency, but may also carry out high-temperature steam or particles, polluting the operating environment and affecting personnel health. In this case, the control module 400 executes a reverse adjustment strategy: reducing the flow rate of the secondary nozzle 102 or increasing the flow rate of the main nozzle 101 to enhance the ejection and suction capabilities, so that excess airflow is effectively guided into the cooling channel.

[0048] Through the aforementioned closed-loop feedback mechanism, the control module 400 continuously and dynamically adjusts the airflow ratio of the main and auxiliary nozzles 102, ensuring that the net static pressure at the inner wall of the conical opening 201 remains at a level essentially consistent with the ambient atmospheric pressure (pressure difference typically controlled within ±50 Pa). In this balanced state, there is neither gas leakage nor air intake, creating a non-contact "pressure seal" effect. This seal does not rely on mechanical bonding but is achieved through the pressure regulation of the fluid itself. Therefore, it can adapt to the random thermal deformation of the cremator kang surface 700 caused by high-temperature circulation, fundamentally solving the technical problems of easy leakage and difficult maintenance associated with traditional rigid connection methods.

[0049] To accommodate the random deformation of the kang surface 700 caused by high temperatures, the cooling device in this embodiment of the invention is further equipped with a moving mechanism 600. This moving mechanism 600 is configured to drive the nozzle assembly to move along a preset direction, so that the nozzles of the main nozzle 101 and the auxiliary nozzle 102 can insert into or exit the conical opening 201 of the cooling channel. In some embodiments, the moving mechanism 600 may specifically adopt a linear slide structure: including a slide rail fixed along the central axis of the conical opening 201, and a slide rigidly connected to the nozzle assembly. The slide is driven by a servo motor, which can drive the entire nozzle assembly to move precisely along the axial direction, completing the "approach-align-insert-exit" action. In other embodiments, the moving mechanism 600 may also adopt a wheeled / tracked chassis, allowing it to travel on a track in front of the kang surface 700, suitable for large-scale cremation equipment.

[0050] The present invention also provides a method for cooling the surface of a cremator, utilizing the cremator surface cooling device described in the above embodiments, with the specific steps as follows:

[0051] S1. After cremation, the 700mm hot surface of the kang (heated brick bed) is moved to the cooling station;

[0052] S2. Start the moving mechanism 600 to advance the nozzle assembly axially. The nozzle of the main nozzle 101 is aligned with the inner end face of the conical opening 201, while the nozzle of the auxiliary nozzle 102 is aligned with the outer end face area of ​​the conical opening 201. Both of them are in a non-contact state with the inner wall of the conical opening 201.

[0053] S3. Start the cooling system 501, initially supplying gas according to the preset flow ratio;

[0054] S4. The pressure sensor collects the pressure at the conical opening 201 in real time, and the control module 400 dynamically adjusts the opening of the regulating valve 505 on the first pipe 503 and the second pipe 504 until the pressure at the conical opening 201 stabilizes at the preset atmospheric pressure value (pressure difference ≤ ±50 Pa).

[0055] S5. Under pressure balance, air is continuously supplied, and the cooling airflow flows efficiently through the cooling channel to complete the 700°C cooling of the kang surface;

[0056] S6. After cooling is complete, shut off the cold source system 501, remove the moving mechanism 600 from the nozzle assembly, and allow the operator to safely collect the ash.

[0057] This invention utilizes the Venturi effect to create a localized negative pressure within the cooling channel by injecting high-speed airflow into the cooling channel through the main nozzle 101. Simultaneously, the auxiliary nozzle 102 injects annular airflow into the inner wall region of the conical opening 201 at the entrance of the cooling channel on the surface 700, forming a positive pressure air curtain. The control module 400 dynamically adjusts the cooling airflow ratio between the main nozzle 101 and the auxiliary nozzle 102 based on the real-time static pressure value at the conical opening 201 fed back by the pressure detection module 300. This ensures that the net static pressure in this region is precisely maintained at the ambient atmospheric pressure level, achieving a dynamic equilibrium state where the net pressure approaches zero. In this state, there is no leakage of cooling medium or intake of ambient air at the conical opening 201, effectively preventing the loss of cooling airflow and dilution of the cooling medium by external air, significantly improving cooling efficiency. This invention utilizes a controllable airflow to construct a "pressure seal" mechanism, replacing the traditional rigid sealing method that relies on mechanical contact. This fundamentally solves the technical problem of thermal deformation of the 700-ton furnace surface in crematoriums under high-temperature conditions, leading to difficulty in precisely connecting the cooling channel inlet with the external air supply pipe, creating gaps and causing leaks. Experiments show that, at an initial temperature of approximately 850℃, cooling using this invention reduces the cooling time by more than 70% compared to natural cooling, with no visible airflow leakage or dust generation during the process. The closed-loop pressure control increases the utilization rate of the cooling medium to over 95%, significantly improving equipment turnover efficiency and enhancing the safety and cleanliness of the operating environment.

[0058] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A cooling device for the surface of a crematorium kiln, characterized in that, include: A cooling channel is provided on the kang surface, and the inlet end of the cooling channel is a tapered opening that widens outwards; The nozzle assembly includes a main nozzle and a secondary nozzle; the main nozzle is used to spray cooling airflow into the interior of the cooling channel, and the secondary nozzle is used to spray cooling airflow into the inner wall region of the conical opening, and neither the main nozzle nor the secondary nozzle contacts the inner wall of the conical opening; The pressure detection module is used to acquire the pressure inside the conical opening in real time; The control module is used to adjust the air flow rate of the main nozzle and the auxiliary nozzle according to the acquired pressure, so that the pressure inside the conical opening is equal to the preset atmospheric pressure.

2. The cooling device for the surface of the cremation machine according to claim 1, characterized in that, The secondary nozzle is sleeved on the outer periphery of the main nozzle, and the nozzle head of the main nozzle extends out of the nozzle opening of the secondary nozzle.

3. The cooling device for the surface of the crematorium kiln according to claim 2, characterized in that, The nozzle orifice diameter of the secondary nozzle is greater than the inner end diameter of the conical opening and less than the outer end diameter of the conical opening; the nozzle orifice diameter of the main nozzle is less than the inner end diameter of the conical opening; the nozzle orifice of the main nozzle is located at the inner end face of the conical opening; the nozzle orifice of the secondary nozzle is located at the outer end face of the conical opening.

4. The cooling device for the surface of the cremation machine according to claim 1, characterized in that, Also includes: A cold source system and an airflow distributor; the air inlet of the airflow distributor is connected to the air outlet of the cold source system; the first air outlet of the airflow distributor is connected to the main nozzle through a first pipe, and the second air outlet of the airflow distributor is connected to the auxiliary nozzle through a second pipe.

5. The cooling device for the surface of the crematorium kiln according to claim 4, characterized in that, Both the first and second pipelines are equipped with regulating valves; the control module is electrically connected to the pressure detection module and the regulating valve respectively, and the control module is used to adjust the opening of the regulating valve according to the obtained pressure so that the pressure in the conical opening is equal to the preset atmospheric pressure.

6. The cooling device for the surface of the cremation machine according to claim 1, characterized in that, Also includes: A moving mechanism; the moving mechanism is configured to move the nozzle assembly along a preset direction so that the nozzle orifice of the main nozzle and the nozzle orifice of the auxiliary nozzle are inserted into or removed from the conical opening of the cooling channel.

7. The cooling device for the surface of a crematorium kiln according to claim 6, characterized in that, The moving mechanism includes: a moving component disposed on the secondary nozzle; the moving component is a wheel or track for rolling or moving on a support surface to drive the secondary nozzle assembly to move; or The moving mechanism includes a slide rail and a slide table; the slide rail is arranged along the central axis of the conical opening; the slide table is fixedly connected to the nozzle assembly and slides in cooperation with the slide rail.

8. The cooling device for the surface of a crematorium kiln according to claim 1, characterized in that, The cooling airflow is low-temperature air with a temperature below 20°C or airflow containing atomized coolant.

9. The cooling device for the surface of a crematorium kiln according to claim 1, characterized in that, The cooling channel includes a first channel and a second channel; the first channel and the second channel are connected by a plurality of parallel branches; the first channel has the conical opening at its inlet end.

10. A method for cooling the surface of a crematorium kiln, characterized in that, The method utilizes the cooling device for the kang (heated brick bed) of a cremator according to any one of claims 1 to 9; the method includes: Cooling airflow is injected into the cooling channel through the main nozzle, and cooling airflow is injected into the inner wall area of ​​the cone-shaped opening of the cooling channel through the auxiliary nozzle. Real-time pressure monitoring of the conical opening; Adjust the air flow rate supplied by the main nozzle and the auxiliary nozzle according to the obtained pressure, so that the pressure inside the conical opening is equal to the preset atmospheric pressure.

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