Crematory and crematory system

Abstract

To provide a crematory and a crematory system in which a time required for cremation is shortened.SOLUTION: A crematory comprises a furnace body including a main combustion furnace that defines a main combustion chamber for burning a coffin, and a recombustion furnace that defines a recombustion chamber into which combustion gas discharged from the main combustion chamber flows. The main combustion furnace includes a main combustion furnace wall part that separates the main combustion chamber from an outside space of the furnace body. The recombustion furnace includes a recombustion furnace wall part that separates the recombustion chamber from the outside space. An overall heat transfer coefficient of the main combustion furnace wall part is larger than an overall heat transfer coefficient of the recombustion furnace wall part.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to crematorium furnaces and crematorium systems. [Background technology]

[0002] The crematorium is equipped with a main combustion furnace into which the coffin is carried, a main combustion burner attached to the main combustion furnace, a re-burning furnace located above the main combustion furnace, and a re-burning burner attached to the re-burning furnace (see, for example, Patent Document 1). Combustion gases generated in the main combustion furnace pass through the re-burning furnace and are discharged from the crematorium. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2023-104028 Summary of the Invention [Problem to be solved by the invention]

[0004] During the course of a day, multiple coffins are brought into the crematorium in sequence and cremation is carried out. The next coffin may have to wait for the cremation of an earlier coffin to be completed, but the longer the waiting time, the longer the coffin's cremation will take.

[0005] An object of the present disclosure is to provide a crematorium and crematorium system that reduces the time required for cremation. [Means for solving the problem]

[0006] A crematorium according to at least one embodiment of the present disclosure comprises: A furnace body including a main combustion furnace defining a main combustion chamber for burning coffins, and a re-burning furnace defining a re-burning chamber into which combustion gas discharged from the main combustion chamber flows, The main combustion furnace includes a main combustion furnace wall portion that separates the main combustion chamber from an outer space of the furnace body, The reburning furnace includes a reburning furnace wall portion that separates the reburning chamber from the outer space, The overall heat transfer coefficient of the main combustion furnace wall portion is greater than the overall heat transfer coefficient of the reburning furnace wall portion.

[0007] A crematorium according to at least one embodiment of the present disclosure comprises: a furnace body including a main combustion furnace defining a main combustion chamber for burning the coffins, and a re-burning furnace defining a re-burning chamber into which combustion gas discharged from the main combustion chamber flows; a main combustion burner attached to the main combustion furnace; Equipped with The main combustion furnace includes a main combustion furnace wall portion that separates the main combustion chamber from an outer space of the furnace body, An in-wall flow path for water to flow is formed inside the main combustion furnace wall, When the main combustion burner is switched from an operating state to a stopped state, cooling water is supplied to the in-wall flow passage.

[0008] A crematorium system according to at least one embodiment of the present disclosure comprises: The crematorium mentioned above; a cooling water tank for storing the cooling water; a cooling water supply line configured to guide the cooling water to the in-wall flow path when the main combustion burner switches from the operating state to the stopped state; Equipped with. [Effects of the Invention]

[0009] According to the present disclosure, a crematorium and crematorium system can be provided that shortens the time required for cremation. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a schematic diagram of a crematorium system according to one embodiment. [Figure 2] FIG. 1 is a schematic diagram of a crematorium according to one embodiment. [Figure 3] FIG. 1 is a schematic diagram of an in-wall channel according to one embodiment. [Figure 4A]FIG. 1 is a schematic diagram showing the process of controlling the supply of cooling water and hot water to the first crematorium according to one embodiment. [Figure 4B] FIG. 4B is a schematic diagram showing the supply control process following FIG. 4A. [Figure 5] FIG. 10 is a schematic diagram showing the process of controlling the supply of hot water and cooling water when the first crematorium according to one embodiment is in a state of preparation for shutting down. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, several embodiments of the present disclosure will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of components described as embodiments or shown in the drawings are merely illustrative examples and are not intended to limit the scope of the present disclosure. For example, expressions expressing relative or absolute arrangement such as "in a certain direction," "along a certain direction," "parallel," "orthogonal," "center," "concentric," or "coaxial" not only express such an arrangement exactly, but also express a state in which there is a relative displacement with a tolerance or an angle or distance to the extent that the same function is obtained. For example, expressions such as "identical," "equal," and "homogeneous" that indicate that something is in an equal state not only indicate a state of strict equality, but also indicate a state in which there is a tolerance or a difference to the extent that the same function is obtained. For example, expressions representing shapes such as a square shape or a cylindrical shape not only represent shapes such as a square shape or a cylindrical shape in the strict geometric sense, but also represent shapes including uneven portions, chamfered portions, etc., to the extent that the same effect can be obtained. On the other hand, the expressions "comprise," "include," or "have" one element are not exclusive expressions that exclude the presence of other elements. Note that the same components will be denoted by the same reference numerals and the description thereof will be omitted.

[0012] <Overview of Crematorium System 1> Figure 1 is a schematic diagram of a crematorium system 1 according to one embodiment of the present disclosure. The crematorium system 1 comprises multiple crematoriums 10, a hot water tank 50, and a cooling water tank 40. Although only two crematoriums 10 are shown in the figure, there may be three or more crematoriums 10.

[0013] Hot water or cooling water is supplied to each main combustion furnace 20 of the multiple crematoriums 10 depending on the operating state of the crematorium 10. For example, hot water is supplied to a crematorium 10 when the temperature inside the furnace is sufficiently high. The hot water is transformed into steam (saturated steam) or high-temperature hot water (i.e., hot water) by the exhaust heat of the crematorium 10 and returned to the hot water tank 50, so the exhaust heat of the crematorium 10 can be stored in the hot water tank 50. On the other hand, when the crematorium 10 is in a state of preparation for shutdown or is in an operational shutdown state, cooling water is supplied instead of hot water. This allows the main combustion furnace 20 to be cooled quickly, shortening the time required for the crematorium 10 to resume operation after completing cremation.

[0014] <Crematorium 10> 2 is a schematic diagram of a crematorium 10 according to one embodiment of the present disclosure. The crematorium 10 is configured to cremate a carried-in coffin 3. For ease of explanation, the upstream side of the direction in which the coffin 3 is carried in will be defined as the front side, and the downstream side will be defined as the rear side.

[0015] The furnace body 4 of the crematorium 10 includes a main combustion furnace 20 and a re-burning furnace 30. The main combustion furnace 20 defines a main combustion chamber Cm for burning the coffin 3, and the re-burning furnace 30 defines a re-burning chamber Ch into which combustion gas discharged from the main combustion chamber Cm flows. The re-burning furnace 30 is located above the main combustion furnace 20, and the re-burning chamber Ch and the main combustion chamber Cm communicate with each other via a communication passage Cp. An opening and closing door 7, made of a fire-resistant and heat-insulating material, is located on the front wall 22 of the main combustion furnace 20 for opening and closing the loading entrance 8.

[0016] The main combustion furnace 20 includes a main combustion furnace wall portion 27 that separates the main combustion chamber Cm from the outer space Si of the furnace body 4, and the reburning furnace 30 includes a reburning furnace wall portion 37 that separates the reburning chamber Ch from the outer space Si. The main combustion furnace wall portion 27 includes a rear wall portion 25, a front wall portion 22, a right wall portion (not shown), and a left wall portion (not shown) of the main combustion furnace 20. The reburning furnace wall portion 37 includes a rear wall portion 35, a front wall portion 32, an upper wall portion 31, a right wall portion (not shown), and a left wall portion (not shown) of the reburning furnace 30.

[0017] The crematorium 10 further comprises a main combustion burner 26 mounted on the rear wall 25 of the main combustion furnace 20 and a reburning burner 36 mounted on the rear wall 35 of the reburning furnace 30. The main combustion burner 26 is configured to inject fuel, such as kerosene or diesel, into the main combustion chamber Cm. The reburning burner 36 is configured to inject fuel, which may be, for example, hydrogen gas, into the reburning chamber Ch.

[0018] An overview of the cremation process performed by the crematorium 10 will now be described. After the coffin 3 placed on a fireproof cart is transported into the main combustion chamber Cm, the opening and closing door 7 closes the loading entrance 8. The crematorium 10 then switches from a stopped state to a started state. More specifically, the main combustion burner 26 and the re-burning burner 36 each switch from a stopped state to an operating state. The operation of the main combustion burner 26 forms a main combustion flame Fm in the main combustion chamber Cm, and the operation of the re-burning burner 36 forms a re-burning flame Fa in the re-burning chamber Ch. While the crematorium 10 is in the started state, the temperature inside the furnace body 4 gradually rises. After start-up operation, the temperature inside the crematorium 10 stabilizes at a sufficiently high temperature.

[0019] The combustion gases generated by the combustion of the coffin 3 in the main combustion chamber Cm flow into the re-burning chamber Ch through the communication passage Cp, carrying with it unburned matter also generated in the main combustion chamber Cm. The unburned matter includes dioxins. At least a portion of the combustion gases flowing into the re-burning chamber Ch are re-burned (completely combusted) by the re-burning flame Fa, making the combustion gas odorless and smokeless. At the same time, at least a portion of the unburned matter undergoes thermal decomposition in the re-burning chamber Ch. Thermal decomposition produces carbon dioxide, water vapor, and hydrogen chloride gas from the dioxins, which become part of the combustion gas.

[0020] The combustion gas discharged from the outlet 39 of the reburning furnace 30 is cooled by a gas cooler, dust collected by a dust collector, and denitrified by a catalytic device, and then released into the atmosphere through an exhaust tower. The catalytic device may further perform a decomposition process using a catalyst to decompose dioxins remaining in the combustion gas.

[0021] When the combustion of the coffin 3 is completed, the main combustion burner 26 and the reburning burner 36 each switch from an operating state to a stopped state. For example, the main combustion burner 26 and the reburning burner 36 may operate so that the main combustion flame Fm and the reburning flame Fa gradually become smaller. The state of the crematorium 10 at this time corresponds to a state of preparation for shutdown. Then, when the main combustion burner 26 and the reburning burner 36 switch to a stopped state, the main combustion flame Fm and the reburning flame Fa are extinguished, and as a result, the crematorium 10 switches to a stopped state.

[0022] After the temperature in the main combustion chamber Cm has dropped sufficiently, the door 7 opens the entrance 8, and the fireproof cart carrying the remains and ashes is transported to the front hall via the antechamber. Another coffin 3 is then transported into the main combustion chamber Cm in the same way, and the crematorium 10 resumes operation.

[0023] <Overall heat transfer coefficient of the main combustion furnace 20> In the crematorium 10 illustrated in FIG. 2, the overall heat transfer coefficient of the main combustion furnace wall 27 is greater than the overall heat transfer coefficient of the re-burning furnace wall 37. The overall heat transfer coefficient of the main combustion furnace wall 27 indicates how easily heat in the main combustion chamber Cm is transferred to a space other than the space in the furnace body 4, such as the outer space Si. Similarly, the overall heat transfer coefficient of the re-burning furnace wall 37 indicates how easily heat in the re-burning chamber Ch is transferred to the outer space Si. In other words, in this example, heat dissipation is more likely to occur in the main combustion furnace wall 27 than in the re-burning furnace wall 37.

[0024] The overall heat transfer coefficient of the main furnace wall 27 may be the average value of the overall heat transfer coefficients of the rear wall 25, front wall 22, right wall (not shown), and left wall (not shown) of the main furnace 20. In this case, the average value is also used for the overall heat transfer coefficient of the reburning furnace wall 37. As another example, the overall heat transfer coefficient of the main furnace wall 27 may be the maximum value of the overall heat transfer coefficients of the above walls. In this case, the maximum value of the overall heat transfer coefficient is also used for the reburning furnace wall 37.

[0025] The characteristics related to the overall heat transfer coefficient will be explained. For example, if the material constituting the main furnace wall 27 has lower insulating properties than the material constituting the reburning furnace wall 37, or if the main furnace wall 27 is thinner than the reburning furnace wall 37, the overall heat transfer coefficient of the main furnace wall 27 will be larger than the overall heat transfer coefficient of the reburning furnace wall 37. Note that the above-mentioned magnitude relationship between the overall heat transfer coefficients established between the main furnace wall 27 and the reburning furnace wall 37 may also be established by the flow of cooling water inside the main furnace wall 27. Specific examples will be explained below.

[0026] 3 illustrates a specific configuration for increasing the overall heat transfer coefficient of the main combustion furnace wall 27. As shown in the figure, an in-wall flow path 5 for water flow is formed inside the main combustion furnace wall 27. In this embodiment, when the main combustion burner 26 switches from an operating state to a stopped state, cooling water is supplied to the in-wall flow path 5. The timing for starting the supply of cooling water may be before or after the main combustion burner 26 switches to the stopped state. For example, the supply of cooling water may be started when the crematorium 10 is in a state of preparation for shutting down.

[0027] The cooling water is supplied from a cooling water tank 40 (see FIG. 1). The cooling water flowing through the in-wall flow passage 5 transports heat from the main combustion chamber Cm to a location separate from the internal space of the furnace body 4, thereby contributing to an increase in the overall heat transfer coefficient of the main combustion furnace wall portion 27. Therefore, while the cooling water is flowing through the in-wall flow passage 5, the overall heat transfer coefficient of the main combustion furnace wall portion 27 is greater than the overall heat transfer coefficient of the re-burning furnace wall portion 37. The in-wall flow passage 5 may be formed in at least one of the rear wall portion 25, front wall portion 22, right wall portion (not shown), and left wall portion (not shown) that make up the main combustion furnace wall portion 27. Note that the water flowing through the in-wall flow passage 5 does not have to be limited to cooling water. Depending on the operating state of the crematorium 10, hot water supplied from a hot water tank 50 may flow instead of cooling water (details will be described later). Furthermore, the in-wall flow passage 5 is not formed in the re-burning furnace wall portion 37.

[0028] According to the above configuration, because the overall heat transfer coefficient of the main combustion furnace wall 27 is large, the temperature of the main combustion furnace 20 is likely to drop after the cremation of the body placed in the coffin 3 is completed and the crematorium 10 is shut down. Because the cooling time of the main combustion furnace 20 can be shortened, the waiting time for the next coffin 3 to be carried into the crematorium 10 can be shortened. Therefore, a crematorium 10 with a shortened cremation time is realized. Furthermore, because the overall heat transfer coefficient of the re-burning furnace wall 37 is small, the temperature of the re-burning furnace 30 is unlikely to drop while the next coffin 3 is being carried into the main combustion chamber Cm. Therefore, it is also possible to reduce the amount of fuel consumed to raise the temperature inside the furnace when the crematorium 10 resumes operation.

[0029] In addition, since cooling water is supplied to the in-wall flow path 5 when the main combustion burner 26 switches from an operating state to a stopped state, the temperature of the main combustion furnace 20 tends to drop after the crematorium 10 is shut down. Therefore, the waiting time for the next coffin 3 to be carried into the crematorium 10 can be shortened.

[0030] <Overall configuration of Crematorium System 1> Returning to Figure 1, the crematorium system 1 comprises a cooling water tank 40 for storing cooling water, a cooling water supply line 44 for supplying the cooling water in the cooling water tank 40 to each of the multiple crematoriums 10, and a cooling water return line 48 for returning the cooling water supplied to each crematorium 10 to the cooling water tank 40.

[0031] The cooling water supply line 44 supplies cooling water to the in-wall flow path 5 (see Figure 3) of the crematorium 10, and the cooling water that has flowed through the in-wall flow path 5 is discharged to the cooling water return line 48. Note that a pump (not shown) for sending cooling water is disposed in each of the cooling water supply line 44 or the cooling water return line 48. Hereinafter, the two crematoriums 10 illustrated in Figure 1 may be identified and referred to as the "first crematorium 11" and the "second crematorium 12."

[0032] The cooling water supply line 44 includes a first cooling water supply line 41 and a second cooling water supply line 42 for supplying cooling water to the first crematorium 11 and the second crematorium 12, respectively, and a first valve 141 and a second valve 142 are arranged on these two supply lines, respectively. When the first valve 141 is open, cooling water is supplied from the first cooling water supply line 41 to the first crematorium 11. Similarly, when the second valve 142 is open, cooling water is supplied from the second cooling water supply line 42 to the second crematorium 12.

[0033] The cooling water return line 48 includes a first cooling water return line 45 and a second cooling water return line 46 for returning the cooling water discharged from the first crematorium 11 and the second crematorium 12 to the cooling water tank 40, respectively, and a first valve 145 and a second valve 146 are disposed on these two return lines. When the first valve 145 is open, the cooling water discharged from the first crematorium 11 returns to the cooling water tank 40 via the first cooling water return line 45. Similarly, when the second valve 146 is open, the cooling water discharged from the second crematorium 12 returns to the cooling water tank 40 via the second cooling water return line 46.

[0034] Furthermore, the crematorium system 1 is equipped with a hot water tank 50 for storing hot water, a hot water supply line 54 for supplying hot water from the hot water tank 50 to the in-wall flow path 5 of the crematorium 10, and a return line 58 for returning steam or hot water (hot water) discharged from the in-wall flow path 5 to the hot water tank 50. At least one of the hot water supply line 54 or the return line 58 is provided with a pump (not shown) for sending hot water or steam.

[0035] The hot water supply line 54 includes a first hot water supply line 51 and a second hot water supply line 52 for supplying hot water to the first crematorium 11 and the second crematorium 12, respectively, and a first valve 151 and a second valve 152 are arranged on these two supply lines. When the first valve 151 is open, hot water is supplied from the first hot water supply line 51 to the first crematorium 11. Similarly, when the second valve 152 is open, hot water is supplied from the second hot water supply line 52 to the second crematorium 12.

[0036] The return line 58 includes a first return line 55 and a second return line 56 for returning the steam or hot water discharged from the first crematorium 11 and the second crematorium 12 to the hot water tank 50, respectively, and a first valve 155 and a second valve 156 are disposed on these two lines. When the first valve 155 is open, the steam or hot water discharged from the first crematorium 11 returns to the hot water tank 50 via the first return line 55. Similarly, when the second valve 156 is open, the steam or hot water discharged from the second crematorium 12 returns to the hot water tank 50 via the second return line 56.

[0037] <Supply control of cooling water and hot water in the first crematorium 11> 4A and 4B show the process of cooling water and hot water supply control when the first crematorium 11 switches from a stopped state to a started state. In both figures, the first cooling water supply line 41, the first return line 55, the first hot water supply line 51, and the first return line 55 are shown with bold lines indicating that fluid is flowing (similar to FIG. 5).

[0038] When the first crematorium 11 is in a stopped state, cooling water is stored in the in-wall flow path 5 of the first crematorium 11, and the first valves 141, 145, 151, 155 are in a closed state (upper part of FIG. 4A). Before the crematorium 10 switches to the start-up state, the first valve 145 changes to an open state, and the cooling water stored in the in-wall flow path 5 returns to the cooling water tank 40 (lower part of FIG. 4A). After the cooling water flows out of the in-wall flow path 5, the first valve 145 returns to a closed state (upper part of FIG. 4B).

[0039] Next, the first crematorium 11 switches from a stopped state to a started state (lower part of Figure 4B). This switching occurs when the main combustion burner 26 and the afterburner 36 each switch from a stopped state to an operating state. At the same time, the first valves 151, 155 change to an open state, allowing hot water to flow through the in-wall flow path 5. While the main combustion burner 26 is in an operating state, hot water continues to flow through the in-wall flow path 5. While the temperature inside the furnace body 4 is rising, hot water is discharged from the in-wall flow path 5. At this time, heat is transferred from the hot water to the main combustion furnace wall 27, which accelerates the temperature rise of the main combustion chamber Cm. When the first crematorium 11 finishes startup operation and the temperature inside the furnace stabilizes at a high temperature, the hot water in the in-wall flow path 5 turns into steam. That is, the hot water flowing into the in-wall flow passage 5 receives the exhaust heat discharged from the main combustion furnace 20 and turns into steam, which can transport the heat to the hot water tank 50 .

[0040] The change of the first valve 145 from the closed state to the open state (lower part of FIG. 4A) may occur immediately after the crematorium 10 switches to the start-up state. In this case, the discharge of the cooling water stored in the in-wall flow path 5 and the subsequent supply of hot water to the in-wall flow path 5 both occur while the first crematorium 11 is in the start-up state.

[0041] When the first crematorium 11 starts up, the main combustion burner 26 switches from a stopped state to an operating state. If hot water is supplied to the in-wall flow path 5 at this time, hot water flows through the in-wall flow path 5 when cremation begins in the crematorium 10, allowing the temperature of the main combustion furnace 20 to rise quickly. This further shortens the time required for cremation. Furthermore, in the period immediately after cremation begins (i.e., the period immediately after the crematorium 10 begins startup operation), unburned materials such as dioxins are likely to be generated due to the relatively low temperature of the main combustion chamber Cm. However, with the above configuration, the temperature rise in the main combustion chamber Cm is accelerated, making it possible to suppress the generation of unburned materials.

[0042] Figure 5 shows the process of controlling the supply of hot water and cooling water when the first crematorium 11 is in a state of preparation for shutting down. While the first crematorium 11 is in a state of preparation for shutting down, the first valve 151 changes to a closed state (upper part of Figure 5), and then the first valve 155 changes to a closed state (not shown). As a result, most of the steam in the in-wall flow path 5 returns to the hot water tank 50. After that, the first valves 141 and 145 change to an open state (lower part of Figure 5) around the time the first crematorium 11 shuts down, and cooling water begins to flow in the in-wall flow path 5. After the cooling water has flowed for a certain period of time, the first valves 141 and 145 change to a closed state. As a result, cooling water accumulates in the in-wall flow path 5 (upper part of Figure 4A).

[0043] The supply control of cooling water and hot water executed for the first crematorium 11, which was explained with reference to Figures 4A, 4B, and 5, is also executed for the second crematorium 12. To avoid duplication of explanation, a detailed explanation will be omitted here.

[0044] In a configuration in which a return line 58 is provided to guide the steam or hot water discharged from the in-wall flow path 5 to the hot water tank 50, the exhaust heat emitted from the first crematorium 11 during cremation is transferred to the hot water flowing through the in-wall flow path 5, and the hot water turns into steam, for example, and returns to the hot water tank 50. This allows the exhaust heat from the first crematorium 11 to be effectively utilized using the hot water. For example, the exhaust heat can also be utilized as heat to start up another crematorium 10, such as the second crematorium 12 (details will be described later).

[0045] <Hot water supply control in crematorium system 1> Returning to Figure 1, the hot water supply control in the crematorium system 1 will be explained. The hot water supply line 54 is configured to selectively guide hot water to each of the crematoriums 10 whose main combustion burners 26 have switched from a stopped state to an operating state (hereinafter also referred to as "started crematoriums"), and to each of the crematoriums 10 whose main combustion burners 26 are operating and whose internal furnace temperature has stabilized (hereinafter also referred to as "operating crematoriums"). The return line 58 is configured to selectively guide steam or hot water discharged from each of the started crematoriums and operating crematoriums among the multiple crematoriums 10 to the hot water tank 50. Such hot water supply control is realized by controlling the opening and closing of valves such as the first valves 151, 155 and the second valves 152, 156.

[0046] For example, if the first crematorium 11 corresponds to the activated crematorium and the second crematorium 12 corresponds to the operating crematorium, hot water is supplied to the first crematorium 11 and the second crematorium 12. If another crematorium 10 (not shown) provided in the crematorium system 1 is stopped, hot water is not supplied to that crematorium 10. In addition, steam or hot water discharged from the first crematorium 11 as the activated crematorium and the second crematorium 12 as the operating crematorium is led to the hot water tank 50 by the return line 58. If another crematorium 10 (not shown) provided in the crematorium system 1 is stopped, steam or hot water is not discharged from that crematorium 10.

[0047] According to the above configuration, steam or hot water returning from the operating crematorium to the hot water tank 50 can be temporarily stored in the hot water tank 50 and then supplied to the starting crematorium. By utilizing the exhaust heat from the operating crematorium as heat to start the starting crematorium, it becomes possible to exchange exhaust heat between multiple crematoriums 10. This allows the crematorium system 1 to improve its overall thermal efficiency.

[0048] <Other> The operations of the main combustion burner 26, the afterburner 36, the first valves 141, 145, 151, 155, and the second valves 142, 146, 152, 156 described above may be controlled through operations by an operator, or may be automatically controlled by a controller (not shown).

[0049] The steam discharged from the in-wall flow path 5 does not have to be returned to the hot water tank 50. The steam may be supplied to steam-using equipment such as a steam turbine, and the hot water produced after condensation may be supplied to hot water-using equipment and facilities. In this case, a configuration may be adopted in which a portion of the cooling water stored in the cooling water tank 40 is replenished to the hot water tank 50. Also, the steam discharged from the in-wall flow path 5 may be returned to the hot water tank 50 after performing work in the steam-using equipment. In this case, the above-mentioned configuration in which a portion of the cooling water is replenished to the hot water tank 50 is not necessarily required.

[0050] The hot water tank 50 may be placed at a higher position than the crematorium 10. If the steam discharged from the in-wall flow path 5 condenses after reaching the hot water tank 50, for example by heat exchange with the outside air, the condensed hot water is stored in the hot water tank 50. In this case, the hot water that falls from the hot water tank 50 into the crematorium 10 may be used to turn a water wheel for power generation.

[0051] <Summary> The contents of the above-described embodiments can be understood, for example, as follows.

[0052] 1) A crematorium furnace (10) according to at least one embodiment of the present disclosure comprises: The furnace body (4) includes a main combustion furnace (20) that defines a main combustion chamber (Cm) for burning the coffins (3), and a re-burning furnace (30) that defines a re-burning chamber (Ch) into which combustion gas discharged from the main combustion chamber flows, The main combustion furnace includes a main combustion furnace wall portion (27) that separates the main combustion chamber from an outer space (Si) of the furnace body, The reburning furnace includes a reburning furnace wall portion (37) that separates the reburning chamber from the outer space, The overall heat transfer coefficient of the main combustion furnace wall portion is greater than the overall heat transfer coefficient of the reburning furnace wall portion.

[0053] According to the configuration of 1) above, the overall heat transfer coefficient of the main combustion furnace wall is large, so the temperature of the main combustion furnace is likely to drop after the cremation of the body placed in the coffin is completed. The cooling time of the main combustion furnace can be shortened, so the waiting time for the next coffin to be carried into the crematorium can be shortened. This results in a crematorium with a shorter cremation time. Furthermore, the overall heat transfer coefficient of the re-burning furnace wall is small, so the temperature of the re-burning furnace is less likely to drop while the next coffin is being carried into the main combustion chamber. This also reduces the amount of fuel consumed to raise the temperature inside the furnace when cremation begins.

[0054] 2) In some embodiments, the crematorium described in 1) above is The furnace further comprises a main combustion burner (26) attached to the main combustion furnace; An in-wall flow path (5) for water to flow is formed inside the main combustion furnace wall, When the main combustion burner is switched from an operating state to a stopped state, cooling water is supplied to the in-wall flow passage.

[0055] According to the configuration of 2) above, when the cremation is completed and the main combustion burner is switched from the operating state to the stopped state, the cooling water flows through the in-wall flow path, so the temperature of the main combustion furnace tends to drop. This reduces the waiting time for the next coffin to be carried into the crematorium.

[0056] 3) The crematorium (10) according to at least one embodiment of the present disclosure comprises: a furnace body (4) including a main combustion furnace (20) defining a main combustion chamber (Cm) for burning the coffins (3) and a re-burning furnace (30) defining a re-burning chamber (Ch) into which combustion gas discharged from the main combustion chamber flows; a main combustion burner (26) attached to the main combustion furnace; Equipped with The main combustion furnace includes a main combustion furnace wall portion that separates the main combustion chamber from an outer space of the furnace body, An in-wall flow path (5) for water to flow is formed inside the main combustion furnace wall, When the main combustion burner is switched from an operating state to a stopped state, cooling water is supplied to the in-wall flow passage.

[0057] According to the configuration of 3) above, when the cremation of the body placed in the coffin is completed and the main combustion burner is switched from the operating state to the stopped state, the cooling water flows through the flow path in the wall, so the temperature of the main combustion furnace is likely to drop. Since the cooling time of the main combustion furnace can be shortened, the waiting time for the next coffin to be carried into the crematorium can be shortened. This realizes a crematorium that shortens the time required for cremation.

[0058] 4) In some embodiments, the crematorium according to 2) or 3) above, An in-wall flow path (5) for water to flow is formed inside the main combustion furnace wall, When the main combustion burner is switched from a stopped state to an operating state, hot water is supplied to the in-wall flow passage.

[0059] According to the configuration of 4) above, when cremation begins in the crematorium, hot water flows through the in-wall flow path, allowing the temperature of the main combustion chamber to rise quickly. This further shortens the time required for cremation. Furthermore, shortly after cremation begins, the temperature of the main combustion chamber is relatively low, which makes it easy for unburned materials such as dioxins to be generated, but according to the configuration of 4) above, it is also possible to suppress the generation of unburned materials.

[0060] 5) The crematorium system (1) according to at least one embodiment of the present disclosure is The crematorium (10) according to 2) or 3) above, a cooling water tank (40) for storing the cooling water; a cooling water supply line (44) configured to guide the cooling water to the in-wall flow path when the main combustion burner switches from the operating state to the stopped state; Equipped with.

[0061] The configuration 5) above provides the same technical advantages as the configurations 2) and 3).

[0062] 6) In some embodiments, the crematorium system described in 5) above, a hot water tank (50) for storing hot water; a hot water supply line (54) configured to guide the hot water to the in-wall flow path when the main combustion burner switches from the stopped state to the operating state; Further provided are:

[0063] According to the configuration 6) above, the same technical advantages as those in 4) above can be obtained.

[0064] 7) In some embodiments, the crematorium system described in 5) or 6) above, a hot water tank (50) for storing hot water; a hot water supply line (54) configured to direct the hot water into the in-wall flow passage while the main combustion burner is in the operating state; a return line (58) for guiding the steam or hot water discharged from the in-wall flow path to the hot water tank; Further provided are:

[0065] According to the configuration of 7) above, the waste heat emitted from the crematorium during cremation is transferred to the hot water flowing through the wall channel, and the hot water turns into steam and returns to the hot water tank. Therefore, the waste heat from the crematorium can be effectively utilized by using the hot water.

[0066] 8) In some embodiments, the crematorium system described in 7) above, The crematorium system comprises a plurality of the crematoriums, The hot water supply line is configured to selectively guide the hot water to each of the startup crematoriums in which the main combustion burner switches from the stopped state to the operating state and the operating crematoriums in which the main combustion burner is in the operating state, among the plurality of crematoriums; The return line is configured to selectively guide the steam or the hot water discharged from each of the starting crematorium and the operating crematorium among the plurality of crematoriums to the hot water tank.

[0067] According to the configuration of 8) above, steam or hot water returning from the operating crematorium to the hot water tank can be temporarily stored in the hot water tank and then supplied to the starting crematorium. By using the exhaust heat from the operating crematorium as heat to start the starting crematorium, it becomes possible to transfer exhaust heat between multiple crematoriums. This improves the overall thermal efficiency of the crematorium system. [Explanation of symbols]

[0068] 1: Crematorium system 3: Coffin 4:Furnace body 5: In-wall flow channel 7: Opening and closing door 8: Loading entrance 10: Crematorium 11: 1st crematorium 12:Second crematorium 20: Main combustion furnace 22: Front wall 25: Rear wall 26: Main combustion burner 27: Main combustion furnace wall 30: Reburning furnace 31: Upper wall part 32: Front wall 35: Rear wall 36: Re-burning burner 37: Reburning furnace wall 39: Outlet 40: Cooling water tank 41: First cooling water supply line 42: Second cooling water supply line 44: Cooling water supply line 45: First cooling water return line 46: Second cooling water return line 48: Cooling water return line 50: Hot water tank 51: First hot water supply line 52: Second hot water supply line 54: Hot water supply line 55: First return line 56: Second return line 58: Return line 141, 145, 151, 155: First valve 142, 146, 152, 156: Second valve Ch: Reburning chamber Cm: Main combustion chamber Cp: ​​Communication path Fa: Reburning flame Fm: Main combustion flame Si: outer space

Claims

1. A furnace body including a main combustion furnace defining a main combustion chamber for burning coffins, and a re-burning furnace defining a re-burning chamber into which combustion gas discharged from the main combustion chamber flows, The main combustion furnace includes a main combustion furnace wall portion that separates the main combustion chamber from an outer space of the furnace body, The reburning furnace includes a reburning furnace wall portion that separates the reburning chamber from the outer space, The overall heat transfer coefficient of the main combustion furnace wall portion is greater than the overall heat transfer coefficient of the reburning furnace wall portion. Crematorium.

2. Further comprising a main combustion burner attached to the main combustion furnace, An in-wall flow path for water to flow is formed inside the main combustion furnace wall, When the main combustion burner is switched from an operating state to a stopped state, cooling water is supplied to the in-wall flow passage.

2. The cremation furnace of claim 1.

3. a furnace body including a main combustion furnace defining a main combustion chamber for burning the coffins, and a re-burning furnace defining a re-burning chamber into which combustion gas discharged from the main combustion chamber flows; a main combustion burner attached to the main combustion furnace; Equipped with The main combustion furnace includes a main combustion furnace wall portion that separates the main combustion chamber from an outer space of the furnace body, An in-wall flow path for water to flow is formed inside the main combustion furnace wall, When the main combustion burner is switched from an operating state to a stopped state, cooling water is supplied to the in-wall flow passage. Crematorium.

4. An in-wall flow path for water to flow is formed inside the main combustion furnace wall, When the main combustion burner is switched from a stopped state to an operating state, hot water is supplied to the in-wall flow passage. A crematorium according to claim 2 or 3.

5. A crematorium according to claim 2 or 3; a cooling water tank for storing the cooling water; a cooling water supply line configured to guide the cooling water to the in-wall flow path when the main combustion burner switches from the operating state to the stopped state; A cremation furnace system comprising:

6. a hot water tank for storing hot water; a hot water supply line configured to guide the hot water to the in-wall flow path when the main combustion burner switches from the stopped state to the operating state; Further equipped 6. The cremation furnace system of claim 5.

7. a hot water tank for storing hot water; a hot water supply line configured to direct the hot water into the in-wall flow passage while the main combustion burner is in the operating state; a return line for guiding the steam or hot water discharged from the in-wall flow path to the hot water tank; Further equipped 6. The cremation furnace system of claim 5.

8. The crematorium system comprises a plurality of the crematoriums, The hot water supply line is configured to selectively guide the hot water to each of the startup crematoriums in which the main combustion burner switches from the stopped state to the operating state and the operating crematoriums in which the main combustion burner is in the operating state, among the plurality of crematoriums; The return line is configured to selectively guide the steam or the hot water discharged from each of the starting crematorium and the operating crematorium among the plurality of crematoriums to the hot water tank.

8. The crematorium system of claim 7.

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