Mattress decomposition furnace system and combustion facility including the same

Abstract

To provide a mattress decomposition furnace system that can treat a pre-decomposed mattress as it is.SOLUTION: A mattress decomposition furnace system 1 includes: a decomposition furnace 11 for disposing one or more mattresses m therein; a heating part 12 for generating a heating gas to be fed into the decomposition furnace 11; and a ventilator 13 for feeding an exhaust heat gas discharged from the decomposition furnace 11 to a combustion facility 2.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a mattress decomposition furnace system and a combustion facility equipped with the same, for example, a system for heat treating pocket coil mattresses and a combustion facility equipped with the same, such as an industrial waste treatment facility or a general waste treatment facility. [Background technology]

[0002] Disposing of mattresses (separating metal from combustible materials) at municipal waste disposal facilities requires a great deal of time and effort. Pocket coil mattresses are made of metal coil springs wrapped in fabric, so dismantling them takes more time and effort than bonnell coil mattresses. In recent years, the use of pocket coil mattresses has been on the rise, raising concerns about tighter operating costs due to the increased workload on-site and rising labor costs.

[0003] The pocket coil processing device in Patent Document 1 includes a heater that heats and melts the packaging of the pocket coil. The pocket coil is formed by enclosing a metal coil spring inside a packaging made of a nonwoven fabric of a resin such as polyethylene or polyethylene terephthalate. Heated air is sent to the pocket coil by a heater and a fan, heating and melting the packaging. The patent discloses that the heater is placed on the inner wall of the insulating ceiling and generates heat sufficient to melt resin components such as the resin packaging that encases the pocket coil (see paragraph 0021 of the specification).

[0004] The pocket coil processing device in Patent Document 2 is equipped with a heating unit that heats and melts the packaging of the pocket coils being transported. It is disclosed that the temperature of the heated air is at least high enough to melt the resin that makes up the packaging of the pocket coils, but lower than the ignition temperature of the resin, and that the temperature of the air blown onto the pocket coils is between 350°C and 500°C (see paragraphs 0025 and 0026 of the specification). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 7034458 [Patent Document 2] Patent No. 6832552 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the above Patent Document 1, it is necessary to provide a shower room for washing away the hot air exhaust with water, while in the above Patent Document 2, it is necessary to provide a guard part for protecting the heating part from the coil spring that pops out when the packaging is melted, and a peeling part for peeling off the resin particles that have adhered to the surface of the conveyor belt when the packaging is melted.

[0007] In both Patent Documents 1 and 2, the multi-layer structure of the mattress is disassembled before the pocket coils are processed, and the mattress cannot be processed as is before being disassembled. Furthermore, the use of atmospheric air to generate hot air requires a large amount of energy consumption. Furthermore, the hot air must be exhausted.

[0008] Therefore, an object of the present disclosure is to provide a mattress decomposition furnace system that can process not only dismantled mattresses but also mattresses before dismantling, as well as a combustion facility equipped with the same. Another object of the present invention is to provide a mattress decomposition furnace system that can reduce the energy required to generate heated gas at melting temperature, and a combustion facility equipped with the same. Another object of the present invention is to provide a mattress decomposition furnace system that can treat the exhaust of heated gas in the combustion facility, and a combustion facility equipped with the same. [Means for solving the problem]

[0009] The mattress decomposition furnace system (1) of the present disclosure includes: a cracking furnace (11) having one or more mattresses (m) disposed therein; a heating section (12) for generating heated gas, for example, at 450°C or higher, to be sent to the decomposition furnace (11); a fan (13) for sending exhaust gas discharged from the decomposition furnace (11) to a combustion facility (2); Equipped with.

[0010] The heating section (12) may include a first heater (121) and a second heater (122). The first heater (121) may be, for example, a steam heater that generates heated gas from room temperature (for example, 15°C to 20°C) to a first temperature (for example, 180°C to 220°C). The second heater (122) may be, for example, an electric heater that generates heated gas from a first temperature (for example, 180°C to 220°C) to a second temperature (for example, 450°C to 550°C).

[0011] The gas source of the heated gas generated in the heating section (12) may be, for example, the atmosphere, preheated primary combustion air gas provided from the combustion facility (2), combustion gas before the chimney, circulating gas, combustion gas on the outlet side of the dust collector, or gas turbine exhaust gas. If the gas source provided by the combustion facility is at a temperature higher than the atmosphere and close to the first temperature, only the second heater (122) may be provided.

[0012] The mattress decomposition furnace system (1) comprises: an internal temperature measuring unit (18) for measuring the internal temperature of the decomposition furnace (11); a heating gas control means (19) for controlling the amount of heating gas supplied from the heating unit (12) so that the temperature measured by the internal temperature measurement unit (18) falls within a predetermined temperature range (for example, a second temperature (450°C to 550°C)); The device may also include:

[0013] The heating gas control means (19) may include a supply duct (191) through which the heating gas flows, a damper (192) provided in the supply duct (191), and a supply amount control unit (193) that controls the opening and closing of the damper (192) (for example, adjusting the opening degree or controlling full closing and opening) and adjusts the supply amount of the heating gas.

[0014] The mattress decomposition furnace system (1) comprises: a temperature measuring unit (14) for measuring the temperature of the heated gas sent from the heating unit (12); a heating unit control unit (15) that controls the heating unit (12) so that the temperature measured by the temperature measurement unit (14) falls within a predetermined temperature range (for example, a second temperature (450°C to 550°C)); The device may also include:

[0015] The mattress decomposition furnace system (1) comprises: a pressure measuring unit (16) for measuring the pressure inside the cracking furnace (11); a ventilator control unit (17) that controls the ventilator (13) so that the pressure measured by the pressure measuring unit (16) is maintained in a negative pressure state; The device may also include: By maintaining the pressure inside the decomposition furnace (11) at a negative pressure, it is possible to prevent the heating gas and the treated exhaust gas from leaking out of the decomposition furnace (11).

[0016] The thickness direction (W) of the mattress and the height direction (H) of the decomposition furnace (11) may intersect or be perpendicular to each other.

[0017] The decomposition furnace (11) an introduction section (11a) into which the heated gas sent from the heating section (12) is introduced; an outlet portion (11b) from which exhaust gas to be sent to the fan (13) is discharged; A heat insulating structure (11c); a dividing section (111) dividing the interior of the cracking furnace (11) into a lower section (111a) and an upper section (111b); a guide frame portion (112a, 112b, 112c) provided in the upper portion (111b) divided by the dividing portion (111) and for placing the mattress; a vibration generating means (vibrator) for removing ash (dust) adhering to the interior of the decomposition furnace (11) (for example, the ceiling surface, side surface, etc. of the heat insulating structure (11c)); a tray (118) for receiving ash (dust) provided in the lower portion (111a); The device may also include:

[0018] The dividing section (111) may be configured to have a number of through holes formed therein, through which heated gas is sent from the lower section (111a) to a mattress (m) placed in the upper section (111b). The inlet portion (11a) may be connected to the lower portion (111a). The outlet portion (11b) may be connected to the upper portion (111b) or to the ceiling side inside the cracking furnace. The ceiling (11d) of the cracking furnace (11) may have a hood-like structure to reduce the flow rate of the exhaust gas when it is sucked in, thereby preventing the suction of ash (dust).

[0019] The combustion facility (2) of the present disclosure includes: The mattress decomposition furnace system (1); a combustion furnace (20); a boiler (22) into which combustion gas discharged from the combustion furnace (10) is introduced; an economizer (23) into which combustion gas discharged from the boiler (12) is introduced; a dust collector (25) for collecting dust from the combustion gas discharged from the economizer (13); a chimney (26) for discharging the combustion gas sent from the dust collector (25) into the atmosphere; a combustion material supply section (21a, 21b, 21c) for sending a combustion material (X) to the combustion furnace (20); a primary combustion air supply fan (32) for sending primary combustion air to the combustion furnace (20); a first heater (121) for heating the primary combustion air; a secondary combustion air supply fan (33) for sending secondary combustion air to the combustion furnace (20); a circulating gas supply fan (34) for sending circulating gas downstream of the dust collector (25) to the combustion furnace (20); The device may also include:

[0020] The gas heated by the first heater (121) may be sent to the second heater (122), and the exhaust gas sent by the fan (13) may be introduced into the duct (L2) upstream of the secondary combustion air supply fan (33).

[0021] The primary combustion air heated by the first heater (121) may be sent to the second heater (122), and the exhaust heat gas sent by the fan (13) may be introduced into a duct (L1) downstream of the first heater (121) and downstream of the position from which the primary combustion air is led out.

[0022] The primary combustion air heated by the first heater (121) may be sent to the second heater (122), and the exhaust gas sent by the fan (13) may be introduced into the lower side (primary combustion chamber 20a) of the combustion furnace (20).

[0023] The circulating gas downstream of the dust collector (25) may be sent to the second heater (122), and the exhaust gas sent by the fan (13) may be introduced into the lower side (primary combustion chamber 20a) of the combustion furnace (20).

[0024] The circulating gas downstream of the dust collector (25) may be sent to the second heater (122), and the exhaust gas sent by the fan (13) may be introduced into a duct (L51) downstream of the dust collector (25) and downstream of the position from which the circulating gas is led out.

[0025] (effect) (1) Mattresses can be disposed of as they are before being dismantled, and mattresses can also be disposed of after being dismantled. (2) By using gas heated by the combustion facility, the energy required to generate heated gas at the melting temperature can be reduced. (3) By performing exhaust treatment of heated gases at the combustion facility, there is no need to install separate equipment for exhaust treatment. [Brief explanation of the drawings]

[0026] [Figure 1] FIG. 1 is a diagram showing a mattress decomposition furnace system according to a first embodiment. [Figure 2] 1 is a diagram showing a combustion facility according to a first embodiment. FIG. [Figure 3] FIG. 10 is a diagram showing a combustion facility according to a second embodiment. [Figure 4] FIG. 10 is a diagram showing a combustion facility according to a third embodiment. [Figure 5] FIG. 10 is a diagram showing a combustion facility according to a fourth embodiment. [Figure 6] FIG. 10 is a diagram showing a combustion facility according to a fifth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0027] Several embodiments of the present invention will be described below. The embodiments described below are examples of the present invention. The present invention is not limited to the following embodiments, and includes various modifications that are implemented within the scope of the present invention.

[0028] (Embodiment 1) 1 shows a mattress decomposition furnace system 1. The mattress decomposition furnace system 1 includes a decomposition furnace 11, a first heater 121, a second heater 122, and a fan 13.

[0029] The first heater 121 is configured as a steam heater for the primary combustion air of the combustion facility 2. The first heater 121 generates heated gas that has been heated from room temperature (for example, 15°C to 25°C) to a first temperature, for example, 180°C to 220°C.

[0030] The second heater 122 generates heated gas by increasing the temperature of the gas (air in this embodiment) heated by the first heater 121 from a first temperature (for example, 180°C to 220°C) to a second temperature (for example, 450°C to 550°C). The second heater 122 is, for example, an electric heater.

[0031] The decomposition furnace 11 can accommodate one or more mattresses m therein. In this embodiment, three mattresses can be processed simultaneously. The decomposition furnace 11 has an inlet section 11a into which heated gas sent from the second heater 122 is introduced, an outlet section 11b from which exhaust gas to be sent to the fan 13 is discharged, and a thermal insulation structure 11c on the ceiling section 11d, sides, and bottom. The cracking furnace 11 also has a dividing section 111 that divides the interior of the cracking furnace 11 into a lower section 111a and an upper section 111b. The dividing section 111 has a metal grating structure with many through holes formed in the vertical direction. The dividing section 111 is configured to send heated gas from the lower section 111a to a mattress m placed in the upper section 111b. The inlet section 11a is connected to the lower section 111a. The outlet section 11b is connected to the upper section 111b or the ceiling section 11d inside the cracking furnace. The ceiling section 11d has a hood-like configuration to slow the flow rate when exhaust heat gas is sucked in, preventing the inhalation of ash (dust).

[0032] Additionally, three guide frame portions 112a, 112b, and 112c are provided in the upper portion 111b of the cracking furnace 11. Each of the three guide frame portions 112a, 112b, and 112c is made up of a metal wire frame shaped to accommodate a mattress m. Some of the frame portions of the guide frame portions are openable and closable, allowing the mattress m to be taken in and out. The mattresses m are not arranged horizontally but are arranged along the height direction so that the heated gas flows in the height direction. In this embodiment, the mattresses m are arranged so that the thickness direction W of the mattresses m is perpendicular to the height direction H of the cracking furnace 11. Furthermore, the three mattresses m are arranged at intervals from each other.

[0033] The decomposition furnace 11 also includes a vibration generating means (vibrator) for removing ash (dust) adhering to the ceiling 11d, side surfaces, etc. of the heat insulating structure 11c. The lower part 111a of the decomposition furnace 11 is provided with a tray 118 for receiving ash (dust).

[0034] The fan 13 is provided in a duct 131 connected to the outlet portion 11b, and sends the exhaust heat gas that has been discharged to the combustion facility 2.

[0035] The mattress decomposition furnace system 1 includes a temperature measurement unit 14 that measures the temperature of the heated gas sent from the second heater 122, and a heating unit control unit 15 that controls the second heater 122 so that the temperature measured by the temperature measurement unit 14 falls within a predetermined temperature range (for example, a second temperature (450°C to 550°C)).

[0036] The temperature of the heated gas generated by the second heater 122 controlled by the heating unit control unit 15 is preferably 450°C or higher and 550°C or lower. Setting the temperature at 450°C or higher can suppress the adhesion of tar. Setting the temperature at 550°C or lower can make it easy to remove the metal parts of the mattress m.

[0037] The mattress decomposition furnace system 1 includes an internal temperature measuring unit 18 that measures the internal temperature of the decomposition furnace 11, and a heating gas control means 19 that controls the supply amount of heating gas sent from the second heater 122 so that the temperature measured by the internal temperature measuring unit 18 falls within a predetermined temperature range, for example, a second temperature (for example, 450°C to 550°C). The heating gas control means 19 includes a supply duct 191 through which the heating gas flows, a damper 192 provided in the supply duct 191, and a supply amount control unit 193 that controls the opening and closing of the damper 192 to adjust the supply amount of the heating gas. This makes it possible to maintain the atmospheric temperature inside the cracking furnace 11 at, for example, 450°C or higher.

[0038] The mattress cracking furnace system 1 includes a pressure measuring unit 16 that measures the pressure inside the cracking furnace 11, and a ventilator control unit 17 that controls the ventilator 13 so that the pressure measured by the pressure measuring unit 16 is maintained at a negative pressure. This allows the interior of the cracking furnace 11 to be constantly maintained at a negative pressure.

[0039] Figure 2 shows the combustion facility 2. The combustion facility 2 includes a stoker-type combustion furnace 20, a combustion material supply section (21a, 21b, 21c), a boiler 22, an economizer 23, a bag filter 25 (corresponding to a dust collector), a chimney 26, and the like.

[0040] The combustion material X is supplied to the stoker-type combustion furnace 20 by a combustion material supply unit 21 and combusted. The combustion material supply unit is configured to include, for example, a transfer device 21a (e.g., a crane) for feeding the combustion material X from a garbage pit into the supply port of the combustion furnace 20, an extrusion device 21b for pushing the combustion material X from the supply port to the stoker unit, and a stoker-type supply unit 21c (e.g., a conveyor).

[0041] The combustion air supply section is composed of a primary combustion air duct L1, a secondary combustion air duct L2, a circulation gas duct L51, a primary combustion air supply fan 32, a secondary combustion air supply fan 33, a circulation gas supply fan 34, a damper (not shown), etc. The primary combustion air is heated to a first temperature by a first heater (primary combustion air heater) 121 provided downstream of the primary combustion air supply fan 32.

[0042] The combustion furnace 20 has a lower primary combustion chamber 20a and an upper secondary combustion chamber 20b. The combustion gas combusted in the combustion furnace 20 is sent to a boiler 22 and then to an economizer 23.

[0043] The combustion gas duct L5 leading out from the economizer 23 is connected to the bag filter 25. A blower 36 is provided in the combustion gas duct L5 leading out from the bag filter 25, and sends the combustion gas from which dust has been removed by the bag filter 25 to the chimney 26. A circulation gas duct L51 branches off from the combustion gas duct L5 upstream of the blower 36. A circulation gas supply fan 34 and a damper (not shown) are provided in the circulation gas duct L51, and a portion of the combustion gas from which dust has been removed is sent to the combustion furnace 20 as circulation gas.

[0044] In the first embodiment, the heated gas heated by the first heater 121 that heats the primary combustion air is sent to a branch duct L11 branched from the primary combustion air duct L1, sent to the second heater 122, and heated to a second temperature. The heated gas at the second temperature is sent to the lower part 111a of the cracking furnace 11 via the inlet part 11a, maintains the atmospheric temperature in the cracking furnace 11 at 450°C or higher, and is then sent by the fan 13 to the duct 131 via the outlet part 11b and sent to the secondary combustion air duct L2 upstream of the secondary combustion air supply fan 33.

[0045] Each control unit may be composed of hardware such as one or more processors and memory for storing programs, a control procedure program, etc. The control unit may be composed of an information processing device, a dedicated circuit, etc.

[0046] An example of the "combustion furnace" is a stepped stoker. Examples of "combustible materials" include garbage (municipal garbage, household garbage), industrial waste, and biomass. Biomass includes waste-based biomass (livestock waste, food waste, waste paper, pulp mill effluent, sewage sludge, human waste sludge, construction wood, sawmill residues, etc.), unused biomass (rice straw, wheat straw, rice husks, forest residues, etc.), resource crops (sugar resources, starch resources, oil resources), willow, poplar, switchgrass, etc.

[0047] (Embodiment 2) FIG. 3 shows a combustion facility 2 and a mattress decomposition furnace system 1 according to a second embodiment. In the second embodiment, the heated gas heated by the first heater 121 that heats the primary combustion air is sent to a branch duct L11 branched from the primary combustion air duct L1, sent to the second heater 122, and heated to a second temperature. The heated gas at the second temperature is sent to the lower part 111a of the cracking furnace 11 via the inlet part 11a, maintains the atmospheric temperature in the cracking furnace 11 at 450°C or higher, and is then sent by the fan 13 to the duct 131 via the outlet part 11b, and sent to the primary combustion air duct L1 downstream of the first heater 121 and downstream of the position where the primary combustion air is branched.

[0048] (Embodiment 3) FIG. 4 shows a combustion facility 2 and a mattress decomposition furnace system 1 according to a third embodiment. In the third embodiment, the heated gas heated by the first heater 121 that heats the primary combustion air is sent to a branch duct L11 branched from the primary combustion air duct L1, sent to the second heater 122, and heated to a second temperature. The heated gas at the second temperature is sent to the lower part 111a of the cracking furnace 11 via the inlet part 11a, maintains the atmospheric temperature in the cracking furnace 11 at 450°C or higher, and is then sent by the fan 13 via the outlet part 11b to the duct 131 and sent to the primary combustion chamber 20a of the combustion furnace 20.

[0049] (Embodiment 4) FIG. 5 shows a combustion facility 2 and a mattress decomposition furnace system 1 according to a fourth embodiment. In the fourth embodiment, the circulation gas is sent to a branch circulation gas duct L511 branched from the circulation gas duct L51, sent to a second heater 122, and heated to a second temperature. The heated gas at the second temperature is sent to the lower part 111a of the cracking furnace 11 via the inlet part 11a, maintains the atmospheric temperature in the cracking furnace 11 at 450°C or higher, and is then sent by the fan 13 via the outlet part 11b to the duct 131 and sent to the primary combustion chamber 20a of the combustion furnace 20.

[0050] (Embodiment 5) FIG. 6 shows a combustion facility 2 and a mattress decomposition furnace system 1 according to a fifth embodiment. In the fifth embodiment, the circulation gas is sent to a branch circulation gas duct L511 branched from the circulation gas duct L51, sent to a second heater 122, and heated to a second temperature. The heated gas at the second temperature is sent to a lower part 111a of the cracking furnace 11 via an inlet part 11a, maintains the atmospheric temperature in the cracking furnace 11 at 450°C or higher, and is then sent by a fan 13 via an outlet part 11b to a duct 131, and sent to the circulation gas duct L51 downstream of the branch circulation gas duct L511.

[0051] (Another embodiment) (1) The combustion facility 2 may further include an agent injection device for injecting an agent for filtration treatment into the combustion gas duct L5 upstream of the bag filter 25. (2) The combustion facility 2 does not need to be provided with a configuration for sending the combustion gas to the combustion furnace 20 as a circulating gas. (3) The dividing section 111 does not have to be provided. (4) The tray 118 does not have to be provided. (5) It is not necessary to provide a vibration generating means.

[0052] Example 1 The decomposition treatment was carried out for a predetermined time at an atmospheric temperature of about 450° C. in the decomposition furnace 11. The sponge and fabric of the mattress were decomposed (peeled off) without any tar adhesion, and the nonwoven fabric portion of the pocket coil was decomposed satisfactorily.

[0053] (Comparative Example 1) The decomposition treatment was carried out for a predetermined time at an atmospheric temperature of about 350°C in the decomposition furnace 11. The sponge and fabric of the mattress were decomposed (peeled off), and the nonwoven fabric part of the pocket coil was decomposed well. However, tar was attached.

[0054] (Comparative Example 2) The decomposition treatment was carried out for a predetermined time at an atmospheric temperature of about 250° C. in the decomposition furnace 11. The sponge and fabric of the mattress could not be decomposed (peeled off), but the nonwoven fabric portion of the pocket coil could be decomposed. [Explanation of symbols]

[0055] 1 Mattress decomposition furnace system 11 Decomposition furnace 11a Introduction 11b Derivation part 11c Insulated structure 11d Ceiling 111 Split section 111a Lower part 111b Upper part 112a, b, c Guide frame part 118 Tray 121 First heater 122 Second heater 13 Ventilator 14 Temperature measurement part 15 Temperature control unit 16 Pressure measurement section 17 Ventilator control unit 18 Temperature measurement section 191 Supply Duct 192 Damper 193 Supply volume control unit 2. Combustion facilities 20 Combustion furnace 23 Economizer 25 Bag filter (exhaust gas filtration device) 26 Chimney 32 First combustion air supply fan 33 Second combustion air supply fan 34 Circulating gas supply fan

Claims

1. a decomposition furnace having one or more mattresses disposed therein; a heating unit that generates a heated gas to be sent to the cracking furnace; a fan for sending exhaust gas discharged from the decomposition furnace to a combustion facility; A mattress decomposition furnace system comprising:

2. an internal temperature measuring unit for measuring the internal temperature of the cracking furnace; a heating gas control means for controlling the amount of heating gas supplied from the heating unit so that the temperature measured by the internal temperature measurement unit falls within a predetermined temperature range; 10. The mattress decomposition furnace system of claim 1, comprising:

3. a temperature measuring unit that measures the temperature of the heated gas sent from the heating unit; a heating unit control unit that controls the heating unit so that the temperature measured by the temperature measuring unit falls within a predetermined temperature range; 10. The mattress decomposition furnace system of claim 1, comprising:

4. a pressure measuring unit for measuring the pressure inside the cracking furnace; a ventilator control unit that controls the ventilator so that the pressure measured by the pressure measuring unit is maintained in a negative pressure state; 10. The mattress decomposition furnace system of claim 1, comprising:

5. A mattress decomposition furnace system according to any one of claims 1 to 4, Combustion facility.

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