Garbage bin heating device

Abstract

The utility model provides a garbage bin heating device, which relates to the technical field of garbage power plant equipment, and comprises a deaerator and seven discharge doors which are arranged in a garbage power plant, a steam exhaust port of the deaerator is communicated with a steam pipeline, one end of the steam pipeline deviating from the deaerator is communicated with a steam air preheater, and the other end of the steam pipeline is communicated with a steam air outlet. The steam pipeline is further communicated with a steam generator through a three-way valve, one end of the steam air preheater is communicated with a centrifugal fan, and the other end of the steam air preheater is communicated with a heating air pipe; a hole is formed in the upper portion of each discharging door, and the end, away from the steam air preheater, of the heating air pipe communicates with the holes and is used for feeding hot air into the garbage bin in the discharging doors, so that the technical problems that in the prior art, the heating temperature is not uniform, and energy is wasted due to high-power direct blowing are solved; the technical effects that the waste heat of the deaerator is used for evenly heating the garbage bin, full fermentation of the garbage is guaranteed, the heat value of the garbage is increased, cost is reduced, and the energy utilization rate is increased are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to garbage power plant equipment technical field especially is involved in a kind of garbage bin heating device. BACKGROUND

[0002] With the rapid development of urbanization process and the gradual improvement of people's environmental protection consciousness, as the place of garbage collection, storage and transfer, garbage bin in garbage disposal industry is related to the efficiency of the entire garbage disposal system. In cold winter, the temperature in the garbage bin is low, and the fermentation process of garbage is hindered by low temperature, so the fermentation effect is greatly discounted, which further leads to a significant reduction in garbage power generation. At the same time, low temperature also makes garbage freeze and stick together, increasing the difficulty of garbage disposal. In order to improve this low temperature condition, the garbage bin needs to be heated.

[0003] At present, the equipment for heating the garbage bin uses hot air direct blowing type heating. Hot air is generated by a hot air furnace and directly introduced into the garbage bin through a pipeline. A plurality of air outlets are arranged on the top or side of the garbage bin, and hot air is blown out of these air outlets to heat the garbage in the garbage bin.

[0004] However, the hot air direct blowing type heating device in the prior art has the following problems:

[0005] 1. Since the direct blowing type hot air supply is used, the heat is excessively concentrated near the air outlet, and the temperature is too high. The area far away from the air outlet is difficult to obtain sufficient heat, and the temperature is obviously low, so it is impossible to realize uniform coverage of heat in the garbage bin. The uneven temperature distribution may cause some garbage in the garbage bin to dry out or even risk of local spontaneous combustion, while some garbage is still in a frozen state.

[0006] 2. In order to make the whole garbage bin reach the required temperature, the hot air furnace needs to be continuously operated at high power. However, during the transmission of hot air, a large amount of heat is still lost to the surrounding environment, which reduces the energy utilization efficiency and causes waste of energy. CONTENT OF THE UTILITY MODEL

[0007] The utility model aims to provide a garbage bin heating device to alleviate the technical problems of uneven heating temperature and high-power direct blowing waste of energy in the prior art.

[0008] The utility model provides a kind of garbage warehouse heating device, including deaerator and seven discharge gates being arranged in garbage power station, the steam outlet of deaerator is connected with steam pipeline, one end of steam pipeline away from deaerator is connected with steam air preheater, steam pipeline is also connected with steam generator by three-way valve, one end of steam air preheater is connected with centrifugal fan, another end of steam air preheater is connected with heating air pipe;Hole is set in each discharge gate upper, one end of heating air pipe away from steam air preheater is connected to hole, for the hot air that is sent into the garbage warehouse of discharge gate.

[0009] Further, gate valve is arranged on the pipeline of steam pipeline close to deaerator, and stop valve is arranged on the pipeline of steam pipeline close to steam generator;Electric regulating valve is arranged on the pipeline of heating air pipe close to hole.

[0010] Further, hole is circular, and the diameter of hole is 450mm-500mm.

[0011] Further, baffle door is hinged on the discharge gate 2 along the outer periphery of hole.

[0012] Further, the outside of steam pipeline and heating air pipe is covered with heat preservation layer.

[0013] Further, the air volume of centrifugal fan is 35000Nm 3 / h-3800Nm 3 / h, and the air pressure of centrifugal fan is 2000pa-2500pa.

[0014] Further, steam air preheater includes shell, heat exchange pipe, air inlet, air outlet, steam inlet and steam outlet;

[0015] one end of shell is provided with air inlet to connect centrifugal fan, and the other end of shell is provided with air outlet to connect heating air pipe;Shell is provided with heat exchange pipe in the shape of snake, one end of heat exchange pipe is provided with steam inlet to connect steam pipeline, and the other end of heat exchange pipe is provided with steam outlet to connect steam outlet.

[0016] Further, the steam temperature in heat exchange pipe is 150 DEG C-160 DEG C, and the air temperature blown by centrifugal fan into shell is 20 DEG C-25 DEG C;The air temperature in heating air pipe is 60 DEG C-80 DEG C.

[0017] Beneficial effects:

[0018] The utility model provides a garbage warehouse heating device, including the deaerator and seven unloading doors of arrangement in the garbage power station, the steam outlet of deaerator is connected with the steam pipeline, the one end of steam pipeline is connected with the steam air preheater away from deaerator, steam pipeline still has the steam generator through the three -way valve, the one end of steam air preheater is connected with centrifugal fan, the other end of steam air preheater is connected with heating air pipe, and the hole is set up above each garbage warehouse unloading door, and the one end of heating air pipe is connected to the hole away from steam air preheater, is used for sending the hot air into the garbage warehouse in the unloading door.

[0019] The utility model discloses a garbage warehouse heating device, including the deaerator and seven unloading doors of arrangement in the garbage power station, the steam outlet of deaerator is connected with the steam pipeline, the one end of steam pipeline is connected with the steam air preheater away from deaerator, steam pipeline still has the steam generator through the three -way valve, the one end of steam air preheater is connected with centrifugal fan, the other end of steam air preheater is connected with heating air pipe, and the hole is set up above each garbage warehouse unloading door, and the one end of heating air pipe is connected to the hole away from steam air preheater, is used for sending the hot air into the garbage warehouse in the unloading door.

[0020] In addition, energy utilization efficiency is improved, pollutant emission caused by energy consumption is reduced, and the stable garbage treatment process reduces the negative impact on the environment, achieving environmental protection and economic win-win. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the utility model or the technical scheme in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0022] Figure 1 The structure schematic diagram of the garbage warehouse heating device provided by the utility model embodiment is shown;

[0023] Figure 2 The structure schematic diagram of the steam air preheater in the garbage warehouse heating device provided by the utility model embodiment is shown.

[0024] Figure: 1 - deaerator;2 - unloading door;3 - steam pipeline;301 - gate valve;302 - stop valve;4 - steam air preheater;401 - housing;402 - heat exchange pipe;403 - air inlet;404 - air outlet;405 - steam inlet;406 - steam outlet;5 - steam generator;6 - centrifugal fan;7 - heating air pipe;701 - electric regulating valve;8 - hole. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0027] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0028] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships in which the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third", etc. are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0029] In addition, the terms "horizontal", "vertical", "overhanging", etc. do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0030] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] Some embodiments of the present application will be described in detail below with reference to the drawings. In the case of no conflict, the following examples and features in the examples can be combined with each other.

[0032] The embodiment of the utility model provides a kind of garbage warehouse heating device, including deaerator 1 and seven discharge gates 2 arranged in garbage power station, the steam outlet of deaerator 1 is communicated with steam pipeline 3, one end of steam pipeline 3 away from deaerator 1 is communicated with steam air preheater 4, steam pipeline 3 is also communicated with steam generator 5 by three-way valve, one end of steam air preheater 4 is communicated with centrifugal fan 6, the other end of steam air preheater 4 is communicated with heating air pipe 7;Hole 8 is set in each discharge gate 2 upper, the end of heating air pipe 7 away from steam air preheater 4 is communicated to hole 8, for sending hot air into the garbage warehouse of discharge gate 2.

[0033] Specifically, as shown in Figure 1 Garbage power deaerator 1 is one of the equipment in garbage power plant, and its main functions are to remove oxygen from fuel, adjust the gas pressure of combustion chamber and reduce the emission of carbon dioxide. In the deaerator 1, in order to maintain stable deoxygenation effect, a steam door is provided on the deaerator. The steam door is used to discharge the oxygen separated from water in time by using part of the steam as power. In the present application, the steam outlet in the deaerator 1 is connected to the steam pipeline 3 through a flange, which is used as a heating steam source for the steam air preheater 4. The steam originally discharged from the deaerator 1 is waste steam containing a large amount of useful heat. By introducing it into the steam air preheater 4, the effective recovery and reuse of waste steam heat is realized, which not only reduces the demand for additional energy, but also reduces energy consumption and operating costs, and reduces pollutant emissions.

[0034] The end of the steam pipeline 3 away from the deaerator 1 is connected to the heating steam port of the steam air preheater 4. The steam air preheater 4 is selected as a heat exchange component and is arranged at the northwest corner of the discharge platform. The steam air preheater 4 is a heat exchange component with a large number of heat exchange tubes inside, which increases the contact area of steam and air and improves the heat exchange efficiency. The high-temperature steam flows in the heat exchange tubes, transferring heat to the low-temperature air outside the tubes. Not only is the waste steam heat effectively transferred to the air, but also the temperature of the preheated hot air can be adjusted according to actual needs, providing a stable and suitable temperature for the garbage warehouse. The steam pipeline 3 is connected to the steam generator 5 through a three-way valve. The three-way valve can flexibly control the flow direction and flow rate of the heating steam according to the actual operation needs of the garbage power station. When the steam air preheater 4 needs more steam to improve the heating efficiency, the three-way valve will adjust the opening degree to deliver part of the steam from the steam generator 5 to the steam air preheater 4.

[0035] One end of the steam-air preheater 4 is connected to the centrifugal fan 6 through a flange. The centrifugal fan 6 provides air to the steam-air preheater 4, allowing the air to continuously enter the steam-air preheater 4 for heating. This ensures the continuous and stable operation of the steam-air preheater 4, providing a stable source of air for heating the garbage bin. The power provided by the centrifugal fan 6 enables the hot air to circulate and transport effectively within the garbage bin, ensuring that each area of the garbage bin receives sufficient heat and avoiding uneven heating caused by insufficient air volume. The other end of the steam-air preheater 4 is connected to the heating air pipe 7. The heating air pipe 7 is made of carbon steel plate, which has good strength and corrosion resistance. The heating air pipe 7 transports the high-temperature hot air generated by the steam-air preheater 4 to the garbage bin. Due to its good heat preservation performance, the heat loss during transmission is reduced, ensuring that the hot air can reach the garbage bin at a high temperature and improving energy utilization efficiency.

[0036] Holes 8 are separately provided above the seven discharge gates 2, and the end of the heating air pipe 7 away from the steam-air preheater 4 is connected to these holes 8, ensuring that the hot air can be evenly distributed in the garbage bin through the discharge gates 2, avoiding local overheating or overcooling. The hot air from the holes 8 above the discharge gates 2 blows into the garbage bin, directly acting on the garbage, effectively solving the freezing and sticking problems of the garbage caused by low temperature, making the temperature in the garbage bin more uniform, creating a suitable temperature environment for garbage fermentation, and improving the efficiency of garbage fermentation.

[0037] It should be noted that through the power supply of the centrifugal fan 6 and the delivery path of the heating air pipe 7, the hot air can be evenly circulated in the garbage bin, avoiding freezing or sticking of the garbage due to local low temperature. After adopting the scheme of the utility model, the temperature distribution uniformity error in the garbage bin can be controlled within ±3℃, greatly improving the smoothness and efficiency of garbage disposal, and facilitating subsequent garbage fermentation and power generation links.

[0038] It should be noted that using the exhaust steam of the deaerator 1 as the heating steam source realizes efficient recovery and reuse of waste heat, reducing dependence on external energy; the steam-air preheater 4 and the heating air pipe 7 have heat preservation layers, reducing heat loss during transmission. Compared with direct heating, energy consumption can be reduced by 25% to 40%.

[0039] In the embodiment of the utility model, the steam pipeline 3 is provided with a gate valve 301 on the pipeline close to the deaerator 1, and a stop valve 302 on the pipeline close to the steam generator 5; the heating air pipe 7 is provided with an electric regulating valve 701 on the pipeline close to the hole 8.

[0040] The hole 8 is circular, and the diameter of the hole 8 is 450mm to 500mm.

[0041] A baffle door is hinged to the discharge gate 2 along the outer periphery of the hole 8.

[0042] Specifically, the gate valve 301 arranged on the pipeline of the steam pipeline 3 close to the deaerator 1 adopts a rising stem gate valve, the valve stem is fixedly connected with the gate plate, and the valve stem will be extended or retracted during opening and closing. The caliber of the gate valve 301 is matched with the steam pipeline 3, when it is necessary to overhaul and maintain the connection between the deaerator 1 and the steam pipeline 3, or to adjust the flow and pressure of the steam, the gate valve 301 can be operated to cut off or adjust the steam supply. The stop valve 302 arranged on the pipeline of the steam pipeline 3 close to the steam generator 5 adopts a straight-through stop valve, the valve disc moves up and down along the center line of the valve seat to realize the opening and closing of the valve. The stop valve 302 can withstand the scouring and corrosion of the steam. The stop valve 302 is mainly used for the flow and pressure of the steam generator 5. The arrangement of the gate valve 301, the stop valve 302 and the three-way valve at the connection facilitates the control of the steam conveying of the steam pipeline. In an emergency, the steam can be quickly cut off.

[0043] A plurality of electric regulating valves 701 are arranged on the pipeline of the heating air pipe 7 close to the hole 8, and one electric regulating valve 701 is arranged on each branch connected to the hole 8. According to the preset program or the real-time monitored temperature data in the garbage bin, the opening degree of the electric regulating valve 701 is controlled, and the flow of the hot air in the heating air pipe 7 is automatically adjusted. When the temperature in the garbage bin is low, the electric regulating valve 701 automatically increases the opening degree, so that more hot air enters the garbage bin through the discharge door 2; when the temperature approaches or reaches the suitable temperature range for garbage fermentation, the electric regulating valve 701 reduces the opening degree, and the stable hot air amount is maintained.

[0044] The hole 8 on the discharge door 2 is in a circular shape, and the diameter is 450mm-500mm. The circular hole 8 can make the hot air more uniformly diffuse when flowing out, and reduce the turbulence phenomenon of the airflow. The diameter range can ensure that enough hot air enters the garbage bin, meet the heating demand of a large area of garbage in the garbage bin, and at the same time, the diameter is not too large to cause unnecessary impact on the garbage due to the too fast speed of the hot air when entering the garbage bin.

[0045] A baffle door is hinged on the discharge door 2 along the outer periphery of the hole 8. The baffle door is made of aluminum alloy, which reduces the weight while ensuring sufficient strength. The hinge of the baffle door adopts a hinge, and the baffle door can be opened and closed through manual or automatic control, and adjusted according to the actual situation of the garbage discharge and fermentation area.

[0046] In the embodiment of the utility model, the steam pipeline 3 and the heating air pipe 7 are both coated with a heat preservation layer.

[0047] The air volume of the centrifugal fan 6 is 35000Nm 3 / h-3800Nm 3 / h, and the air pressure of the centrifugal fan 6 is 2000pa-2500pa.

[0048] Specifically, the steam pipe 3 and the heating air pipe 7 are both externally covered with a thermal insulation layer, which is made of 50mm thick rock wool or 50mm-80mm thick aluminum silicate fiber felt. Rock wool and aluminum silicate fiber felt have low thermal conductivity, which can effectively prevent heat loss. The thermal insulation layer is tightly attached to the outer wall of the pipe, and is wrapped or smeared to ensure that there are no obvious gaps and cavities. For the steam pipe 3, the thermal insulation layer can reduce the heat loss of steam during transportation, so that the steam can reach the steam-air preheater 4 at a high temperature and pressure, ensuring efficient heat exchange. For the heating air pipe 7, the thermal insulation layer can prevent the temperature of the preheated hot air from decreasing during transportation to the garbage bin, ensuring that the hot air entering the garbage bin has enough heat to raise the temperature in the garbage bin.

[0049] The power output of the centrifugal fan 6 can ensure that the generated hot air has sufficient kinetic energy, and can realize efficient and stable circulation in the garbage bin, providing uniform heat supply to each area in the garbage bin.

[0050] In the embodiment of the utility model, steam-air preheater 4 includes casing 401, heat exchange pipe 402, air inlet 403, air outlet 404, steam inlet 405 and steam outlet 406;

[0051] One end of casing 401 is provided with air inlet 403 connected with centrifugal fan 6, and the other end of casing 401 is provided with air outlet 404 connected with heating air pipe 7;Casing 401 is internally provided with heat exchange pipe 402 in a serpentine shape, one end of heat exchange pipe 402 is provided with steam inlet 405 connected with steam pipe 3, and the other end of heat exchange pipe 402 is provided with steam outlet 406 connected with steam outlet.

[0052] The temperature of steam in heat exchange pipe 402 is 150-160 DEG C, and the temperature of air blown by centrifugal fan 6 into casing 401 is 20-25 DEG C;The temperature of air in heating air pipe 7 is 60-80 DEG C.

[0053] Specifically, as shown in Figure 2 Air inlet 403 is located at the left end of casing 401 and is rigidly connected with the outlet of centrifugal fan 6 through a flange, and an internal flow guide plate is arranged to uniformly distribute air;Air outlet 404 is located at the right end of casing 401 and is butted with heating air pipe 7 through a flange, to ensure that the hot air is output without vortex. Heat exchange pipe 402 is made of seamless carbon steel pipe, and the surface is rolled with spiral fins. The length of a single pipe is 8m, and the heat exchange pipe 402 is arranged in a serpentine shape, i.e. the maximum area of contact with air in casing 401, which increases the heat exchange area compared with straight pipes. Compared with the traditional hot blast stove direct blowing system, the 60-80 DEG C hot air preheated by the steam-air preheater 4 of the utility model is uniformly sent into the garbage bin through the heating air pipe 7, and the vertical temperature difference in the bin is not greater than 5 DEG C and the horizontal temperature difference is not greater than 3 DEG C, in cooperation with the holes 8 above the unloading door 2.

[0054] It should be noted that the steam air preheater 4 can be a conventional existing heat exchange device to ensure that high-temperature steam can be used to heat low-temperature air.

[0055] Based on the above embodiments, the working process of the garbage bin heating device provided by the utility model is as follows:

[0056] The exhaust steam discharged by the deaerator 1 in the garbage power station and the steam generator 5 are distributed to the steam air preheater 4 through the steam pipeline 3 according to the demand. The steam entering the steam air preheater 4 flows into the serpentine heat exchange pipe 402 from the steam inlet 405 and flows in the pipe. The centrifugal fan 6 blows air into the preheater shell 401 from the air inlet 403, and the air fully contacts the heat exchange pipe 402 in the shell 401, absorbs the heat of the steam, and enters the heating air pipe 7 from the air outlet 404. The heating air pipe 7 delivers hot air to the garbage bin through the discharge door 2, raises the temperature in the garbage bin, and promotes the fermentation of the garbage.

[0057] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, but not to limit them; although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that: they can still modify the technical solutions recorded in the above embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A waste bunker heating device, comprising a deaerator (1) and seven discharge gates (2) arranged in a waste power station, characterized in that, an exhaust port of the deaerator (1) is communicated with a steam pipeline (3), one end of the steam pipeline (3) away from the deaerator (1) is communicated with a steam-air preheater (4), the steam pipeline (3) is further communicated with a steam generator (5) through a three-way valve, one end of the steam-air preheater (4) is communicated with a centrifugal fan (6), the other end of the steam-air preheater (4) is communicated with a heating air pipeline (7); each of the discharge gates (2) is provided with a hole (8) above, one end of the heating air pipeline (7) away from the steam-air preheater (4) is communicated to the hole (8) for sending hot air into the waste bunker in the discharge gate (2).

2. The waste bunker heating device according to claim 1, characterized in that, a gate valve (301) is arranged on the pipeline close to the deaerator (1), a stop valve (302) is arranged on the pipeline close to the steam generator (5) of the steam pipeline (3); an electric regulating valve (701) is arranged on the pipeline close to the hole (8) of the heating air pipeline (7).

3. The waste bunker heating device according to claim 1, characterized in that, the hole (8) is circular, and the diameter of the hole (8) is 450mm-500mm.

4. The waste bunker heating device according to claim 1, characterized in that, a baffle door is hinged on the discharge gate (2) along the outer periphery of the hole (8).

5. The waste bunker heating device according to claim 1, characterized in that, the steam pipeline (3) and the heating air pipeline (7) are both coated with a heat preservation layer.

6. The waste bunker heating device according to claim 1, characterized in that, The air volume of the centrifugal fan (6) is 35000 Nm 3 / h~3800 Nm 3 / h, and the air pressure of the centrifugal fan (6) is 2000 pa~2500 pa.

7. The waste bunker heating device according to claim 1, characterized in that, the steam-air preheater (4) comprises a shell (401), heat exchange pipes (402), an air inlet (403), an air outlet (404), a steam inlet (405) and a steam outlet (406); one end of the shell (401) is provided with the air inlet (403) communicated with the centrifugal fan (6), the other end of the shell (401) is provided with the air outlet (404) communicated with the heating air pipeline (7); the shell (401) is internally provided with the heat exchange pipes (402) in a serpentine shape, one end of the heat exchange pipes (402) is provided with the steam inlet (405) communicated with the steam pipeline (3), the other end of the heat exchange pipes (402) is provided with the steam outlet (406) communicated with the exhaust port.

8. The waste bunker heating device according to claim 7, characterized in that, the steam temperature in the heat exchange pipes (402) is 150℃-160℃, the air temperature blown by the centrifugal fan (6) into the shell (401) is 20℃-25℃; the air temperature in the heating air pipeline (7) is 60℃-80℃.

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