Boiler system

Abstract

The utility model discloses a boiler system which comprises a feeding device, a hearth, a first wind power supply device and a second wind power supply device, the output end of the feeding device is communicated with the lower portion of the hearth, the upper portion of the hearth is communicated with a feeding port of a cyclone separator, and a discharging port of the cyclone separator is sequentially communicated with a material returning device and the lower portion of the hearth. An exhaust pipe of the cyclone separator is sequentially communicated with a heat exchange channel, a desulfurization device and a chimney, a first superheater, a second superheater, an economizer and two air preheaters are sequentially arranged in the heat exchange channel in the direction away from the cyclone separator, and slag outlets are formed in the lower ends of the hearth, the return feeder, the heat exchange channel and the desulfurization device. According to the utility model, high-quality clean energy such as steam can be generated while the solid wastes are treated, so that the problem that the solid wastes in a calcium carbide plant are difficult to treat is solved, the requirement of the periphery on the steam is met, and meanwhile, the slag after combustion can be used for building materials, so that the comprehensive utilization of the gasified ash slag is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of boilers, and in particular relates to a boiler system. Background Art

[0002] Currently, calcium carbide plants generate gasification ash residues, including dust removal ash and purified ash, during their production processes. These ash residues are generally treated as fixed waste. If improperly handled, these ash residues can persist in the environment for extended periods, causing numerous hazards such as land occupation and environmental pollution. However, few existing devices or systems exist for recycling gasification ash residues, and a system for this purpose is urgently needed. Utility Model Content

[0003] In order to overcome the defects of the prior art, the utility model provides a boiler system capable of comprehensively utilizing gasified ash.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] A boiler system includes a feeding device for providing gasified ash and a furnace for providing combustion space, wherein the output end of the feeding device is connected to the lower portion of the furnace, the upper portion of the furnace is connected to the feed port of a cyclone separator, the discharge port of the cyclone separator is connected in sequence to a return feeder and the lower portion of the furnace, the exhaust pipe of the cyclone separator is connected in sequence to a heat exchange channel, a desulfurization device, and a chimney, a first superheater, a second superheater, an economizer, and two air preheaters are sequentially arranged in the heat exchange channel away from the cyclone separator, and a slag outlet is provided at the lower end of the furnace, the return feeder, the heat exchange channel, and the desulfurization device;

[0006] The boiler system further comprises a first wind power supply device for providing primary air to the furnace and providing broadcasting air to the feeding device, and a second wind power supply device for providing secondary air to the furnace.

[0007] The beneficial effects of adopting the above technical scheme are as follows: the gasified ash can be supplied to the furnace by the feeding device, and burned and produced flue gas with the assistance of primary air and secondary air. The flue gas carries part of the material into the cyclone separator, and most of the material is separated and returned to the furnace through the return device for circulating combustion; the flue gas enters the heat exchange channel to exchange heat with the first superheater, the second superheater and the economizer to produce steam required for surrounding production and life; the flue gas after heat exchange enters the desulfurization device for desulfurization and is discharged from the chimney to reduce exhaust pollution; in addition, the slag discharged from the lower end of the furnace, return device, heat exchange channel and desulfurization device can be used for building materials; in summary, the boiler system can generate high-quality clean energy such as steam while processing fixed waste, which not only solves the problem of difficult treatment of solid waste in calcium carbide plants, but also meets the surrounding demand for steam. At the same time, the slag after combustion can be used for building materials, which realizes the comprehensive utilization of gasified ash.

[0008] In one embodiment, the lower end of the furnace is provided with a plurality of slag outlets, and a part of the slag outlets of the furnace are communicated with a slag cooler, and the output end of the slag cooler is communicated with a slag conveyor.

[0009] The beneficial effects of the above technical solutions are that a part of the slag outlets can discharge the slag generated by combustion into the slag cooler for cooling and then be conveyed by the slag conveyor, and the other part of the slag outlets can be used as standby slag outlets.

[0010] In one embodiment, the upper part of the furnace is communicated with the feed inlets of a plurality of cyclone separators, and the discharge outlets of the plurality of cyclone separators are respectively communicated with a plurality of return devices.

[0011] The beneficial effects of the above technical solutions are that such a configuration is conducive to improving the efficiency of the boiler system.

[0012] In one embodiment, the heat exchange channel includes a vertical channel, the second superheater, the economizer and the air preheater are arranged in the vertical channel, and the input end of the desulfurization device is communicated with the lower part of the vertical channel.

[0013] The beneficial effects of the above technical solutions are that in the vertical channel, the flue gas can be exchanged with the second superheater, the economizer and the air preheater, and in this process, the slag in the flue gas can fall to the lower end of the vertical channel under the action of gravity, so as to facilitate discharge.

[0014] In one embodiment, an induced draft fan is arranged between the desulfurization device and the chimney.

[0015] The beneficial effects of the above technical solutions are that such a configuration is conducive to discharging the flue gas treated by the desulfurization device from the chimney.

[0016] In one embodiment, the feeding device includes a plurality of hoppers for storing gasified ash, and the lower end of each hopper is provided with a sealed belt coal feeder, and the output end of the sealed belt coal feeder is communicated with the lower part of the furnace.

[0017] The beneficial effects of the above technical solutions are that such a configuration is conducive to improving the feeding efficiency, because a plurality of hoppers can respectively supply the gasified ash to the furnace through a plurality of sealed belt coal feeders.

[0018] In one embodiment, the feeding device includes a feeding pipe communicated with the lower part of the furnace, and the first air supply device includes a first fan, the output end of the first fan is communicated with an air preheater, and the end of the air preheater away from the first fan is communicated with the feeding pipe and the lower part of the furnace.

[0019] The beneficial effects of the above technical solutions are that the first fan can supply air to the air preheater for preheating, and then supply the preheated air to the feeding pipe and the lower part of the furnace, so as to provide preheated blast and primary air.

[0020] In one embodiment, the input end of the first fan is communicated with a first muffler.

[0021] In one embodiment, the second air supply device comprises a second fan, and the output end of the second fan is communicated with the middle part of the furnace in sequence.

[0022] The beneficial effects of the above technical solutions are that the second fan can supply air to the air preheater for preheating and then supply the air to the middle part of the furnace, so as to provide the preheated secondary air to the furnace.

[0023] In one embodiment, the input end of the second fan is communicated with a second muffler.

[0024] The beneficial effects of the present utility model are that:

[0025] The gasification ash can be supplied to the furnace by the feeding device, and is combusted and generates flue gas under the auxiliary action of the primary air and the secondary air, part of the material is carried into the cyclone separator by the flue gas, most of the material is separated out and returned to the furnace by the return device for circulating combustion; the flue gas enters the heat exchange channel to exchange heat with the first superheater, the second superheater and the coal economizer to generate steam required by surrounding production and life; the flue gas after heat exchange enters the desulfurization device for desulfurization and is discharged from the chimney to reduce exhaust pollution; in addition, the slag discharged from the lower end of the furnace, the return device, the heat exchange channel and the desulfurization device can be used for building materials; in summary, the boiler system can generate steam, a high-quality clean energy, while processing fixed waste, which not only solves the problem of difficult processing of calcium carbide plant solid waste, but also meets the demand of surrounding for steam, at the same time, the slag after combustion can be used for building materials, which realizes comprehensive utilization of the gasification ash. BRIEF DESCRIPTION OF DRAWINGS

[0026] In the following, the present utility model will be described in more detail based on the embodiments and with reference to the drawings.

[0027] Wherein:

[0028] Figure 1 The structure schematic diagram of the present utility model is shown;

[0029] In the drawings, the same parts use the same reference numerals. The drawings are not in actual proportion.

[0030] Reference numerals:

[0031] 1 - feeding device, 101 - hopper, 102 - sealed belt coal feeder, 103 - feeding pipe, 2 - furnace, 3 - cyclone separator, 4 - return feeder, 5 - heat exchange channel, 6 - first superheater, 7 - second superheater, 8 - economizer, 9 - air preheater, 10 - desulfurization device, 11 - induced draft fan, 12 - chimney, 13 - first bypass air duct, 14 - first fan, 15 - first muffler, 16 - second bypass air duct, 17 - second fan, 18 - second muffler, 19 - slag cooler, 20 - slag conveyor. DETAILED DESCRIPTION

[0032] The utility model will be further explained in connection with the drawings below.

[0033] The utility model provides a kind of boiler system, as shown in figure Figure 1 It includes the feeding device 1 for providing gasification ash and the furnace 2 for providing combustion space, the output end of feeding device 1 is communicated with the lower part of furnace 2, the upper part of furnace 2 is communicated with the feed inlet of cyclone separator 3, the discharge port of cyclone separator 3 is sequentially communicated with return feeder 4 and the lower part of furnace 2, the exhaust pipe of cyclone separator 3 is sequentially communicated with heat exchange channel 5, desulfurization device 10 and chimney 12, first superheater 6, second superheater 7, economizer 8 and two air preheaters 9 are sequentially arranged in heat exchange channel 5 away from the direction of cyclone separator 3, and the lower end of furnace 2, return feeder 4, heat exchange channel 5 and desulfurization device 10 is provided with slag outlet;

[0034] The boiler system further includes a first air supply device for providing primary air to the furnace 2 and a secondary air supply device for providing secondary air to the furnace 2.

[0035] It can be understood that the gasification ash can be supplied to the furnace 2 by the feeding device 1, and combustion and flue gas are generated under the assistance of primary air and secondary air, part of the material is carried into the cyclone separator 3 by the flue gas, most of the material is separated out and returned to the furnace 2 by the return feeder 4 for cyclic combustion; the flue gas enters the heat exchange channel 5 to exchange heat with the first superheater 6, the second superheater 7 and the economizer 8 to generate steam required for surrounding production and life; the flue gas after heat exchange enters the desulfurization device 10 for desulfurization and is discharged from the chimney 12 to reduce exhaust pollution; in addition, the slag discharged from the lower end of the furnace 2, the return feeder 4, the heat exchange channel 5 and the desulfurization device 10 can be supplied to the surrounding cement building material factory; in summary, the boiler system can generate steam, a high-quality clean energy, while treating fixed waste, which not only solves the problem of difficult treatment of solid waste in calcium carbide plants, but also meets the demand for steam in the surrounding area, at the same time, the slag after combustion can be used for building materials, which realizes comprehensive utilization of gasification ash.

[0036] It should be noted that the cyclone separator 3 can be a volute type adiabatic cyclone separator, the first superheater 6 is a high temperature superheater, and the second superheater 7 is a low temperature superheater.

[0037] In one embodiment, the lower end of the hearth 2 is provided with a plurality of slag outlets, and a part of the slag outlets of the hearth 2 are communicated with a slag cooler 19, and the output end of the slag cooler 19 is communicated with a slag conveyor 20.

[0038] It can be understood that a part of the slag outlets can discharge the slag generated by combustion and enter the slag cooler 19 for cooling, and then be conveyed through the slag conveyor 20; and the other part of the slag outlets can be used as standby slag outlets.

[0039] In one embodiment, the upper part of the hearth 2 is communicated with a plurality of feed inlets of the cyclone separators 3, and the discharge outlets of the cyclone separators 3 are respectively communicated with a plurality of return devices 4, so as to facilitate the improvement of the efficiency of the boiler system.

[0040] In one embodiment, the heat exchange channel 5 includes a vertical channel, the second superheater 7, the economizer 8 and the air preheater 9 are arranged in the vertical channel, and the input end of the desulfurization device 10 is communicated with the lower part of the vertical channel.

[0041] It can be understood that in the vertical channel, the flue gas can be heat exchanged with the second superheater 7, the economizer 8 and the air preheater 9, and in this process, the slag in the flue gas can fall to the lower end of the vertical channel under the action of gravity, so as to facilitate the discharge.

[0042] In one embodiment, the desulfurization device 10 and the chimney 12 are provided with an induced draft fan 11, so as to facilitate the discharge of the flue gas treated by the desulfurization device 10 from the chimney 12.

[0043] In one embodiment, the feeding device 1 includes two hoppers 101 for loading gasification ash, and the lower end of each hopper 101 is provided with a sealed belt coal feeder 102, and the output end of the sealed belt coal feeder 102 is communicated with the lower part of the hearth 2 through a feeding pipe 103.

[0044] It can be understood that in this way, the two hoppers 101 can respectively deliver the gasification ash to the hearth 2 through the two sealed belt coal feeders 102, so as to facilitate the improvement of the feeding efficiency.

[0045] It should be noted that the sealed belt coal feeder 102 can also have a weighing function.

[0046] In one embodiment, the feeding device 1 includes the feeding pipe 103 communicated with the lower part of the hearth 2, the first air supply device includes a first fan 14, the output end of the first fan 14 is communicated with an air preheater 9, the end of the air preheater 9 away from the first fan 14 is communicated with the lower part of the feeding pipe 103 and the hearth 2, and the input end of the first fan 14 is communicated with a first silencer 15.

[0047] It can be understood that the first air blower 14 can supply air to the air preheater 9 for preheating and then supply into the feeding pipe and the lower part of the furnace 2, so as to provide preheated blast and primary air.

[0048] It should be noted that the variable frequency motor can be arranged at the end of the feeding pipe 103 close to the sealing type belt coal feeder 102, so as to facilitate the adjustment of the feeding amount according to the load.

[0049] It should be further noted that the outlet air duct of the air preheater 9 can be communicated with one end of the first bypass air duct 13, and the other end of the first bypass air duct 13 is provided with a valve and communicated with the first muffler 15, so as to perform hot air recirculation, so as to improve the air inlet temperature of the air preheater 9, and further prevent the heating surface of the air preheater 9 from being corroded.

[0050] In one embodiment, the second air supply device comprises a second air blower 17, and the output end of the second air blower 17 is communicated with another air preheater 9 and the middle part of the furnace 2 in sequence; and the input end of the second air blower 17 is communicated with a second muffler 18.

[0051] It can be understood that the second air blower 17 can supply air to the air preheater 9 for preheating and then supply into the middle part of the furnace 2, so as to provide preheated secondary air to the furnace 2, so as to supplement air and strengthen disturbance and mixing.

[0052] It should be further noted that the outlet air duct of the air preheater 9 can be communicated with one end of the second bypass air duct 16, and the other end of the second bypass air duct 16 is provided with a valve and communicated with the second muffler 18, so as to perform hot air recirculation, so as to improve the air inlet temperature of the air preheater 9, and further prevent the heating surface of the air preheater 9 from being corroded.

[0053] In the description of the present application, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "back", "inner", "outer", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0054] While the application has been described with reference to particular embodiments thereof, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present application. It will thus be appreciated that numerous modifications can be made to the illustrative embodiments and that other arrangements can be devised without departing from the spirit and scope of the present application as defined by the appended claims. It will be understood that the features described in relation to one embodiment can be used in combination with features described in relation to another embodiment.

Claims

1. A boiler system, characterized in that: It comprises a feeding device (1) for providing gasified ash and a furnace (2) for providing a combustion space, wherein the output end of the feeding device (1) is connected to the lower part of the furnace (2), the upper part of the furnace (2) is connected to the feed port of the cyclone separator (3), the discharge port of the cyclone separator (3) is connected to the return material (4) and the lower part of the furnace (2) in sequence, the exhaust pipe of the cyclone separator (3) is connected to a heat exchange channel (5), a desulfurization device (10) and a chimney (12) in sequence, the heat exchange channel (5) is provided with a first superheater (6), a second superheater (7), an economizer (8) and two air preheaters (9) in sequence in the direction away from the cyclone separator (3), and the lower ends of the furnace (2), the return material (4), the heat exchange channel (5) and the desulfurization device (10) are all provided with a slag outlet; It also includes a first wind supply device for providing primary air to the furnace (2) and providing broadcasting air to the feeding device (1), and a second wind supply device for providing secondary air to the furnace (2).

2. A boiler system according to claim 1, characterized in that: A plurality of slag outlets are provided at the lower end of the furnace (2), some of the slag outlets of the furnace (2) are connected to a slag cooler (19), and the output end of the slag cooler (19) is connected to a slag conveyor (20).

3. The boiler system according to claim 1, characterized in that: The upper portion of the furnace (2) is connected to the feed ports of the plurality of cyclone separators (3), and the discharge ports of the plurality of cyclone separators (3) are respectively connected to the plurality of return feeders (4).

4. The boiler system according to claim 1, characterized in that: The heat exchange channel (5) includes a vertical channel, in which the second superheater (7), the economizer (8) and the air preheater (9) are arranged, and the input end of the desulfurization device (10) is connected to the lower part of the vertical channel.

5. The boiler system according to claim 1, characterized in that: An induced draft fan (11) is provided between the desulfurization device (10) and the chimney (12).

6. The boiler system according to claim 1, characterized in that: The feeding device (1) comprises a plurality of hoppers (101) for containing gasified ash, a sealed belt coal feeder (102) being provided at the lower end of the hopper (101), and an output end of the sealed belt coal feeder (102) being connected to the lower part of the furnace (2).

7. A boiler system according to claim 1 or 6, characterized in that: The feeding device (1) includes a feeding pipe (103) connected to the lower part of the furnace (2), the first wind supply device includes a first fan (14), the output end of the first fan (14) is connected to the air preheater (9), and the end of the air preheater (9) away from the first fan (14) is connected to the feeding pipe (103) and the lower part of the furnace (2).

8. A boiler system according to claim 7, characterized in that: The input end of the first fan (14) is connected to a first muffler (15).

9. The boiler system according to claim 7, characterized in that: The second wind power supply device comprises a second fan (17), the output end of the second fan (17) being connected in sequence to the other air preheater (9) and the middle of the furnace (2).

10. The boiler system according to claim 9, characterized in that: The input end of the second fan (17) is connected to a second muffler (18).

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