Automatic feeding device for round straw bales that can be used for both flue gas dust removal and straw drying

Abstract

The invention discloses an automatic straw bale feeding device which can be used for smoke dust removal and straw drying at the same time. The device enables straw bales (8) to be continuously dried in a straw bale dust removal and drying feeding bin (4) using hot air or waste heat smoke from a combustion system (1) or other sources, and the waste heat smoke is simultaneously dust removed and purified by the straw bales (8). Straw bales are put into and transported from a straw bale transport device A (13) at the front to a straw bale transport device B (14) at the rear, and dried and smoke dust removed at an air blowing opening (28). The dried straw bales enter a straw bale push bin (2) through a straw bale locking bin (3) and are finally sent to a combustion system (1). New straw bales are reloaded through a straw bale dust removal and drying feeding bin (4) which is provided with two pivot doors (9, 11), connected to the straw bale locking bin (3) and includes two straw bale transport devices.

Description

Technical Field

[0001] The invention relates to an automatic feeding device for providing fuel for a biomass boiler combustion system. Waste heat flue gas is blown through straw bales to dry them. The straw bales also serve as waste heat flue gas dust filters. The feeding bin integrates the dust removal function into the flue gas circulation. Background Art

[0002] Patent CN202010263152.6 describes that when the waste heat flue gas from the combustion system is used to dry whole bales of crop straw, the dust content in the waste heat flue gas can be significantly reduced. However, that low-cost solution cannot achieve continuous operation, and for large thermal systems, the cost of frequently using equipment with a front loader to transport straw bales is too expensive.

[0003] Patent CN201811060698.0 proposes a combustion system using a sealed loading bin, where the seal can prevent flashback from occurring in the loading bin, but hot air or waste heat flue gas cannot be continuously blown in to remove moisture from the straw bales and achieve drying.

[0004] When the straw bale is placed on the chain, the position of the straw bale cannot be corrected in the direction of movement of the straw bale, the packaging of the straw bale is easily damaged, and the upper bin can only be lifted slightly at an angle, otherwise the straw bale will roll in the opposite direction of the forward movement.

[0005] According to patent CN201811060698.0, when adding new straw bales, the filling door needs to be opened, and air will be sucked into the loading bin and may enter the combustion chamber, which will change the combustion process. Therefore, the addition of straw bales must be completed quickly in the shortest possible time. Once a mistake occurs, it may cause deflagration and other secondary safety problems. This possibility is even more unacceptable for large-scale thermal systems that have higher requirements for constant gas output.

[0006] According to the technical method described in patent CN201811060698.0, a filled loading bin may not be able to quickly terminate the accidental combustion of fuel in the loading bin, and there is currently no technical solution for continuously drying and dusting straw bales using waste flue gas. Summary of the invention

[0007] The purpose of the present invention is to change the loading bin of the combustion system so that even when the loading bin is full of straw bales, accidental fuel combustion in the loading bin can be stopped quickly in a short time. The combustion air no longer enters the combustion chamber uncontrollably, and the smoke from the combustion chamber no longer enters the loading bin, and the operator can add straw bales from the outside without time pressure. The loading bin can be operated automatically for a long time without manual support, the straw bales can also be dried and dusted by the waste heat flue gas, and the dust accumulated in the loading bin can also be disposed of in time.

[0008] According to the present invention, a push bin connected to a straw bale locking bin is designed to feed straw bales into a combustion system, and a loading bin is designed to dry the straw bales and remove dust from the waste flue gas by introducing hot air or waste hot flue gas.

[0009] The push-in silo consists of a common sliding shield and a conveyor chain connected to it. The straw bales are conveyed upwards through the push-in silo to the combustion system. The combustion system is tilted downward so that the fuel can move downwards only by gravity without a conveyor, while the straw bale push-in silo is lifted up to a certain height. In this way, only the front end of the push-in silo is heated by the combustion system. This heated part is arranged with a water cooling jacket and a ceramic lining.

[0010] When another straw bale needs to be added to the push bin, the patented design allows the added straw bale to fall in when the sliding shield is located at the lower station; the sliding shield can also stop at the middle station and the upper station.

[0011] A bale retaining device is placed on top of the push-in silo to prevent the bales from rolling backwards as the sliding shield moves backwards. A bale grabbing area is designed on top of the sliding shield so that straw will only move minimally when it falls in from above. A bale locking bin is placed on top of the push-in silo so that the bales can fall into the bottom plate of the bale locking bin completely by gravity.

[0012] The entrance and exit of the straw bale locking bin are respectively directed toward the straw bale pushing bin and the straw bale dust removal and drying bin, and the entrance and exit are respectively locked with a pivoting door, and these locked pivoting doors are all provided with seals to ensure the sealing performance.

[0013] There is an externally controlled straw bale support device in the straw bale locking bin to fix the straw bale in the straw bale locking bin in a waiting position. At least one of the two doors of the straw bale locking bin is always closed, which can prevent uncontrolled air flow from entering.

[0014] The top of the straw bale dust removal and drying loading bin is connected to the straw bale locking bin, and the length of the dust removal and drying loading bin can be adjusted as needed. When the straw bales are stored in the dust removal and drying loading bin, the waste hot flue gas blows through to achieve the drying of the straw bales and the dust removal of the waste hot flue gas. The hot flue gas distribution channel is arranged in the straw bale dust removal and drying loading bin, and the hot flue gas distribution channel is arranged with blowing openings at equal intervals, and the waste hot flue gas or hot air is blown into the straw bales under pressure through these blowing openings.

[0015] In order to achieve an adequate seal between the blowing opening and the straw bale, continuous slide rails are arranged above and below the blowing opening and on the opposite side, and the distance and contact pressure of the slide rails to the straw bale are adjustable. In this way, the straw bale is positioned and lightly pressed against the blowing opening to ensure the required seal, and the straw bale transport device also generates the pressure required to slightly shape the straw bale.

[0016] The straw round bale transport device consists of the usual endless chain, drive wheels and support wheels. Support tubes are connected to the two chains at equal distances. The round bales are placed on them at right angles to the transport direction and aligned by continuous slide rails. The support tubes are connected to the endless chain by support plates to prevent the support tubes from tipping over to the greatest extent possible.

[0017] The dust accumulated at the bottom of the straw bale dust removal and drying upper bin can be transported to the dust collecting chamber through the scraper, and the scraper is connected by an endless chain to maintain its working position.

[0018] In order to ensure that new straw bales can be added to the dust removal and drying upper silo at any time and that there is always a straw bale in front of all the air blowing holes, the transport device of the present invention is designed to consist of two parts, front and rear. The first transport device part at the front is not equipped with a hot flue gas distribution channel. It is just a straw bale transport device with independent drive and control, and new straw bales can be added from the outside at any time. During automatic operation, the front and rear straw bale transport devices keep in sync, and the straw bales are transferred from the first straw bale transport device at the front to the second straw bale transport device at the rear equipped with a hot flue gas distribution channel.

[0019] In order to transport the straw bales from the dust removal and drying loading bin to the straw bale locking bin, all straw bales are transported to the next nearest blowing opening to obtain waste hot flue gas or hot air. The periodic synchronous operation of the two straw bale transport devices is achieved with the help of two position sensors, one for each straw bale transport device, to correct the synchronization error of the two straw bale transport devices at any time.

[0020] In normal automatic operation, the straw bale pushing silo, straw bale locking silo and straw bale dust removal and drying silo are all in a slightly negative pressure state, and all doors and external drive shafts are sealed. The gas in the silo cannot be dissipated to the outside, and the outside air cannot enter the inside of all silos.

[0021] The modules described above together constitute an automatic straw bale feeding device that can simultaneously meet the needs of straw bale drying and waste flue gas dust removal. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The combustion system (1) is shown in a side view, and the combustion system comprises a straw bale pushing bin (2) and a straw bale locking bin (3), with some structures omitted in the figure.

[0023] Figure 2 The side cross-sectional view shows a straw bale dust removal and drying loading bin (4).

[0024] Figure 3 The cross-sectional view shows the straw bale dust removal and drying loading bin (4).

[0025] Figure 4 A partial side cross-sectional view of a straw bale dust removal and drying loading bin (4) is shown.

[0026] Figure 5 The connection of the support tube (18) is shown.

[0027] Figure 6 The design and arrangement of the scraper (21) is shown.

[0028] Figure 7 The elastic connection of the slide rail (30) is shown.

[0029] In the figure: 1-combustion system, 2-straw bale pushing silo, 3-straw bale locking silo, 4-straw bale dust removal and drying silo, 5-conveying chain, 6-sliding shield, 7-straw bale holding device, 8-straw bale, 9-pivoting door, 10-sealing element, 11-pivoting door, 12-straw bale support device, 13-straw bale transport device A, 14-straw bale transport device B, 15-annular chain, 16-driving wheel, 17-warm support wheel, 18-support pipe, 19-filling door, 20-bottom plate, 21-scraper, 22-dust collecting chamber, 23-buckle door, 24-rolling shaft, 25-gear motor, 26-hot flue gas channel, 27-hot flue gas distribution channel, 28-blowing opening, 29-inner cavity, 30-slide rail, 31-adjustable bracket, 32-waste flue gas discharge channel, 33-insulation layer, 34-support rod, 35-guide plate, 36-support plate, 37-water cooling jacket, 38-ceramic lining, 39-steel beam, 40-straw round bale grabbing area, 41-upper station, 42-middle station, 43-lower station, 44-rolling bottom plate, 45-outer wall, 46-adjusting screw, 47-spring sheet, 48-connecting sheet. DETAILED DESCRIPTION

[0030] Application examples of the present invention will be explained in more detail below with reference to the accompanying drawings.

[0031] Figure 1 The invention comprises a straw bale (8) combustion system (1), the combustion power of the system is 4700 kW. The pre-dried straw bale (8) is automatically loaded into the combustion system (1) by the straw bale automatic loading device of the invention. The entire straw bale automatic loading device is designed to accommodate two straw bales (8) side by side, and only the straw bale (8) located in the front of the field of vision can be seen in the figure.

[0032] The diameter of the round bale used in this embodiment is between 1.15-1.5 meters and the length is about 1.2 meters. It is preferred that the straw round bale has moderate tightness and a dense outer surface, so that hot air or waste heat and flue gas are blown into the straw round bale, and the straw round bale is also easier to gasify and burn.

[0033] The automatic straw bale feeding device according to the present invention is composed of a straw bale pushing bin (2), a straw bale locking bin (3) and a straw bale dust removal and drying bin (4).

[0034] The straw bale pushing silo (2) is designed as a sealed channel made of metal plates, which is inclined upward, here at an angle of about 25 degrees, so that the heat from the combustion system (1) only affects the upper area of ​​the straw bale pushing silo (2). The straw bale pushing silo (2) includes a water cooling jacket (37), a ceramic lining (38), a conveying chain (5) and a sliding shield (6) for pushing the straw bale upward.

[0035] The top of the straw bale push bin (2) is provided with a straw bale holding device (7) which can swing automatically by gravity. The device can prevent the previously pushed straw bale (8) from automatically moving backward and rolling downward when the sliding shield (6) moves backward to reload another straw bale (8).

[0036] When the fuel of the combustion system (1) is exhausted, the chain-driven sliding shield (6) can move all the way to the inlet of the combustion system (1). Usually, in the case of continuous operation, the sliding shield (6) only moves upward to the upper position (41) where the straw bale holding device (7) is effective. When the sliding shield (6) reaches the upper position (41), a signal for reloading the straw bale is issued. After that, when the sliding shield (6) moves to the middle position (42), the straw bale grabbing area (40) is effective, and the straw bale (8) will automatically fall when the sliding shield (6) reaches the lower position (43).

[0037] The straw bale locking bin (3) and the straw bale dust removal and drying bin (4) connected thereto are arranged above the straw bale pushing bin (2), so that the space required for the entire device can be minimized. The straw bale (8) can fall from above into the straw bale pushing bin (2) only by gravity, and when the upwardly opened pivoting door (9) is closed, it presses on the sealing member (10) by its own weight to ensure airtightness. During normal operation, the low negative pressure state in the straw bale pushing bin (2) can enhance the airtightness of the pivoting door (9), so that almost no air can enter the straw bale pushing bin (2) from the outside, thereby preventing the straw bale (8) from burning backwards, and the air supply of the combustion system (1) is always in a controlled state.

[0038] Another pivoting door (11) is responsible for locking the passage from the straw bale dust removal and drying loading bin (4) to the straw bale locking bin (3), where a sealing member (10) is also arranged and the closure is achieved by the weight of the pivoting door (11) itself.

[0039] If the combustion system (1) explodes and the pressure is too high, the pivoting door (9) may be lifted and smoke may enter the straw bale locking bin (3), thereby reducing the overpressure caused by the explosion and improving the safety of the entire system. However, at this time, the pivoting door (11) is always in a closed state to protect the straw bales (8) in the straw bale dust removal and drying loading bin (4) from catching fire.

[0040] When the straw bale support device (12) in the straw bale locking bin (3) is folded, the straw bale (8) is controlled in the waiting position, so that the pivoting doors (9, 11) can only be opened when the other door is closed, which means that no more air can enter the straw bale from the straw bale locking bin (3) to push the straw bale into the bin (2).

[0041] The movable parts are all driven by the pivot, which is isolated from the outside air by a sealing gland, and driven by a gear or a DC motor (not shown). The straw bale dust removal and drying loading bin (4) is connected to the straw bale locking bin (3) at the top.

[0042] Figure 2 The entire length of the straw bale dust removal and drying loading bin (4) described above is shown. It comprises two independent straw bale transport devices A (13) and straw bale transport device B (14), wherein hot air or waste heat flue gas is blown only into the straw bales (8) located on the straw bale transport device B (14), so that the waste heat flue gas and the straw bales (8) are dusted and dried at the same time. In this embodiment, the straw bale transport device B (14) can store 15x2, a total of 30 straw bales (8). When the combustion system (1) is in full power combustion state, the straw bales (8) can stay in the straw bale transport device B (14) for up to 6 hours, while in the case of low combustion power, the straw bales (8) stay longer. In this way, at least 15% of the moisture can be removed from the wet straw bales (8), which is enough to make even very bad fuel suitable for combustion. The length of the straw bale dust removal and drying loading bin (4) at the straw bale transport device B (14) also depends on the amount of waste gas generated by the combustion system (1). When the combustion power of the present embodiment is 4700 kW, at least 30 straw bales should be arranged at the straw bale transport device B (14). A hot air or waste hot gas pressure of at least 800 Pa is required. Under the premise of ensuring the dust removal effect, the lower the density of the straw bales, the lower the required hot air or waste hot gas pressure.

[0043] The straw bale transport device A (13) and the straw bale transport device B (14) both comprise an endless chain (15), a driving wheel (16), a supporting wheel (17), a gear motor (25) and a supporting tube (18). The straw bale transport device A (13) and the straw bale transport device B (14) are both firmly connected by two endless chains (15) at a precise distance. The straw bale (8) is located on the supporting tube (18), and the supporting tube (18) is aligned at right angles to the transport direction and can be moved sideways to place the straw bale (8).

[0044] The straw bale transport device A (13) is configured to add straw bales (8) at a fixed time. A maximum of 10 round straw bales (8) can be delivered to the loading door (19) at a time using a forklift or a front loader, so that the combustion system (1) can continuously burn for about 2 hours at full power. Using a suitable loading device, the straw bales (8) can be delivered to the straw bale transport device A (13) along the direction of travel or at a 90° angle to the side.

[0045] In the automatic operation state, the straw bale transport device A (13) transports the straw bale (8) to the straw bale transport device B (14). To meet this function, the straw bale transport device A (13) and the straw bale transport device B (14) must maintain synchronous operation to ensure that the straw bale (8) is always located in the middle of the blowing opening (28).

[0046] The straw bale transport device A (13) and the straw bale transport device B (14) each have their own independent position transmitter (not shown in the figure) to give a position signal of the support tube (18) and to stop the operation of the straw bale transport device A (13) and the straw bale transport device B (14). Therefore, the error in the synchronous operation of the straw bale transport device A (13) and the straw bale transport device B (14) can be continuously corrected.

[0047] Dust and other debris in the device of the present invention will fall onto the bottom plate (20) of the straw bale dust removal and drying loading bin (4) through the support pipe (18), and will be sent to the dust collecting chamber (22) through the scraper (21). In the dust collecting chamber (22), the dust and other debris can be removed manually or mechanically through the door (23).

[0048] Figure 3 A cross-sectional view of a straw bale dust removal and drying loading bin (4) in the straw bale transport device B (14) region is shown, wherein the driving wheels (16) of two ring chains (15) are arranged on solid rolling shafts (24), and each rolling shaft (24) is located in the middle of the straw bale (8).

[0049] In this embodiment, the operation speed of the straw bale transport device A (13) and the straw bale transport device B (14) is less than 6 cm / s. The 90-125°C hot air or waste hot flue gas from the combustion system (1) is pressurized through the well-insulated hot flue gas channel (26) into the hot flue gas distribution channel (27), and then extends along the straw bale transport device B (14) and blows the hot flue gas into the straw bale (8) through the blowing opening (28), and then dries the straw bale (8) and removes dust from the waste hot flue gas at the same time. Hot air or waste hot flue gas from other sources can also be recycled to dry the straw bale (8) to improve energy utilization efficiency.

[0050] The fan configured in addition can extract the purified dust and waste flue gas containing water vapor from the inner cavity (29) of the straw bale dust removal and drying loading bin (4). Here, the fan speed can be set to maintain a slight negative pressure (-5Pa in this embodiment) in the inner cavity (29), so as to prevent the waste flue gas from escaping when the filling door (19) is opened.

[0051] For this purpose, a low-power axial flow fan (not shown in the figure) is used here to introduce the moist waste flue gas from the straw bale dust removal and drying upper bin (4) into the chimney through the waste flue gas exhaust channel (32).

[0052] In order to prevent heat loss and condensation to the greatest extent, the entire dust removal and drying automatic feeding device is wrapped from the outside by a heat insulation layer (33).

[0053] Slide rails (30) made of wear-resistant steel are arranged on both sides of the straw bale (8) for accurate positioning and proper sealing of the straw bale. The slide rails (30) are connected to the outer wall (45) through an adjustable bracket (31) and a spring sheet (47), so that the force generated by the different lengths of the straw bales can be overcome. When the straw bale (8) is pressed against the blowing opening (28), the straw bale (8) will be properly shaped and sealed. The gear motor (25) will generate the necessary force for this purpose, and this force will be limited by the adjustable bracket (31).

[0054] The ring chain (15) used in this embodiment is composed of round steel with a diameter of about 14 mm, and the maximum pulling force that can be applied by the drive system can reach 50 kN. The welded support pipe (18) with a diameter of 160 mm can move the straw bale (8) transversely to the transportation direction of the straw bale (8) to reach the optimal position. The circular support pipe (18) can protect the shape of the straw bale (8) from deformation.

[0055] Generally, the bundles or covers of straw bales are mainly composed of nets or films made of polyethylene. When the hot air or waste hot smoke blows toward the two straw bales (8) in the straw bale transport device B (14), it may also blow toward the external bundles or covers. However, after the hot air or waste hot smoke mixes with the gas in the inner cavity (29), the temperature will drop to just above 100°C, which will not pose a problem for the heat resistance of polyethylene.

[0056] However, even in this case, the heat resistance of the material used for bundling or wrapping the straw bales must be considered. If necessary, the temperature of the hot air or waste hot flue gas can be reduced by adding more fresh air in front of the fan, which can also reduce the moisture in the hot air or waste hot flue gas without affecting the drying effect of the straw bales. In short, a large amount of hot air or waste hot flue gas must be pressed into the straw bales (8).

[0057] In this way, the smoke escaping from the straw bale (8) during the transportation of the straw bale (8) will maintain a high flow rate, and will not be troubled by dust deposition at the blowing opening (28) and the hot smoke distribution channel (27).

[0058] exist Figure 4The shape and position of the blowing opening (28) can be seen in the figure. In this embodiment, the cross-sectional area of ​​the blowing opening (28) is about 0.25 square meters. The position is relatively low, so hot air or waste heat smoke can be easily delivered to smaller straw bales (8).

[0059] The blowing opening (28) is perpendicular to the traveling direction of the straw bale (8) and is framed by continuous slide rails (30) and support rods (34), which are provided with guide plates (35) to prevent the straw bale (8) from being hooked.

[0060] In this embodiment, the speed of the hot air or waste smoke at the blowing opening (28) is about 0.5 m / s, and after being diffused in the straw bale (8) in all directions, the speed of the hot air or waste smoke is reduced to less than 10 cm / s. As more straw bales (8) pass through and the power of the combustion system (1) decreases, the speed of the hot air or waste smoke decreases and the dust removal effect is enhanced.

[0061] The dust on the bottom plate (20) of the straw bale dust removal and drying upper bin (4) can be discharged through a scraper (21) fixed on an endless chain (15). The endless chain (15) is guided and supported by a supporting wheel (17).

[0062] When the straw bale transport device A (13) and the straw bale transport device B (14) are operated synchronously, the straw bale (8) can be transferred from the straw bale transport device A (13) to the straw bale transport device B (14).

[0063] exist Figure 5 The attachment of the support tube (18) to the endless chain (15) is shown in the figure. A shaped support plate (36) is arranged between the endless chain (15) and the support tube (18) to support the tightened endless chain (15) to prevent the support tube (18) from tilting. In the middle is a support wheel (17) to carry the endless chain (15) and guide the endless chain (15) in a direction perpendicular to the transportation direction of the straw bale (8).

[0064] Figure 6 The embodiment of the scraper (21) is shown. The scraper (21) can also be supported on the next endless chain (15) so that it is always kept in the working position. Because the two endless chains (15) are not stretched and contact the bottom plate (20), the scraper (21) only scrapes on the bottom plate (20) with its own weight, so the wear is very small.

[0065] Figure 7 The elastic attachment of the slide rail (30) is shown. The adjustable bracket (31) is connected to the outer wall (45) of the straw bale dust removal and drying loading bin (4), and the adjusting screw (46) is pressed on the spring sheet (47) made of spring steel. The force is transmitted to the slide rail (30) through the fixed steel sheet (48) to realize the position correction of the straw bale (8). When the position of the straw bale (8) is greatly offset, the slide rail (30) will rebound it.

[0066] If the combustion system (1) sends a fuel demand signal through the conveying chain (5) and the sliding shield (6), the straw bales are pushed into the silo (2) and the straw bales (8) are pushed one by one toward the combustion system (1).

[0067] When the sliding shield (6) reaches the upper station (41) and starts the straw bale holding device (7), the straw bale reloading process starts. At this time, the sliding shield (6) returns to the middle station (42), the pivot door (11) opens, the straw bale transport device A (13) and the straw bale transport device B (14) are started, and the straw bales (8) are transported to the blowing opening (28) station. The straw bales (8) at the top (in this embodiment, two straw bales are placed side by side) fall into the straw bale locking bin (3) and are caught by the straw bale support device (12).

[0068] Then the pivoting door (11) is closed, the pivoting door (9) is opened with a delay, the straw bale support device (12) further delays the release of the straw bale (8) and drops it to the straw bale grabbing area (40) in front of the sliding shield (6), before which the sliding shield (6) has returned to the lower working position (44), at which time the pivoting door (9) is closed, and the straw bale (8) reloading process is completed. The sliding shield (6) will push the straw bale (8) that has fallen into the straw bale grabbing area (40) toward the combustion system (1) only after the combustion system (1) gives a fuel demand signal again.

[0069] In this embodiment, the device of the present invention is mainly composed of movable modules such as a straw bale pushing bin (2), a straw bale locking bin (3), and a straw bale dust removal and drying bin (4) composed of two parts of a transport device.

[0070] By integrating the drying of straw bales (8) and the dust removal of waste flue gas, the number of times of transporting straw bales (8) is reduced and the cost is lowered, and the appearance of the straw bales is also protected.

[0071] Drying of straw fuel can reduce fuel consumption and labor costs. The straw bales (8) pre-dried in the device of the present invention are easier to gasify and burn in the combustion system (1), and the dust emission problem of the straw thermal system can also be solved at the lowest cost.

Claims

1. The automatic straw bale feeding device which can be used for flue gas dust removal and straw drying at the same time is composed of a straw bale pushing bin, a straw bale locking bin and a straw bale dust removal and drying feeding bin composed of two parts of a transport device. In the straw bale pushing bin, the straw bale is placed on a conveyor chain and pushed into the combustion system by a sliding shield; it is characterized in that: The straw bale pushing bin (2) is connected to another straw bale dust removal and drying bin (4) through a straw bale locking bin (3) that can introduce hot air or waste heat flue gas; the straw bale pushing bin (2) includes a straw bale holding device (7) that can automatically swing by gravity, and the straw bale holding device (7) can prevent the previously pushed straw bale (8) from automatically moving backward and rolling downward when the sliding shield (6) moves backward to reload another straw bale (8); the sliding shield (6) moving in the straw bale pushing bin (2) has a straw bale grabbing area (40) at the top for loading the straw bale (8) dropped from the straw bale locking bin (3), and the sliding shield (6) can also stop at an upper workstation (41) or a middle workstation (42); the straw bale locking bin (3) is arranged at the straw bale pushing bin (2) and the straw bale holding device (7) can automatically swing by gravity, and the straw bale holding device (7) can prevent the previously pushed straw bale (8) from automatically moving backward and rolling downward when the sliding shield (6) moves backward to reload another straw bale (8); the sliding shield (6) moving in the straw bale pushing bin (2) has a straw bale grabbing area (40) at the top for loading the straw bale (8) dropped from the straw bale locking bin (3), and the sliding shield (6) can also stop at an upper workstation (41) or a middle workstation (42); the straw bale locking bin (3) is arranged at the straw bale pushing bin (2) and the straw bale holding device (7) can automatically swing by gravity, and the straw bale holding device (7) can automatically swing by gravity, and the straw bale holding device (7) can prevent the previously pushed straw bale (8) from automatically moving backward and rolling downward when the sliding shield (6) moves backward to reload another straw bale (8) The invention relates to a straw bale locking bin (3) and a straw bale storage bin (2) comprising a downwardly inclined rolling bottom plate (44); the inlet and the outlet of the straw bale locking bin (3) are opened and closed by pivot doors (9, 11) respectively; a straw bale support device (12) is provided in the straw bale locking bin (3); the straw bale dust removal and drying loading bin (4) comprises a hot flue gas distribution channel (27), and the hot flue gas distribution channel (27) is provided with equidistant air blowing openings (28) and a continuous, spring-mounted slide rail (30); a straw bale transport device A (13) and a straw bale transport device B (14) are provided at the bottom of the straw bale dust removal and drying loading bin (4); support pipes (18) and scrapers (21) are arranged at irregular intervals on the ring chains (15) of the straw bale transport devices A (13) and B (14).

2. The automatic straw round bale feeding device that can be used for flue gas dust removal and straw drying at the same time according to claim 1 is characterized in that: A support plate (36) is arranged on the support tube (18), and the scraper (21) is extended to the next chain link of the endless chain (15).

3. The automatic straw round bale feeding device which can be used for flue gas dust removal and straw drying at the same time according to claim 1 is characterized in that: In the straw bale dust removal and drying loading bin (4), another independently driven straw bale transport device A (13) which is not equipped with a hot flue gas distribution channel is arranged before the straw bale transport device B (14) which is equipped with a hot flue gas distribution channel (27).

4. The automatic straw round bale feeding device capable of being used for flue gas dust removal and straw drying according to claim 1 is characterized in that: When the straw bale (8) automatically falls into the straw bale push bin (2), the straw bale transport device A (13) and the straw bale transport device B (14) start to operate synchronously, and the straw bale transport device A (13) and the straw bale transport device B (14) stop operating by their respective position sensors.

5. The automatic feeding device for round straw bales that can be used for smoke dust removal and straw drying at the same time according to claim 1 is characterized in that: The straw bale pushing bin (2), straw bale locking bin (3) and straw bale dust removal and drying bin (4) are all operated under a slight negative pressure and are sealed to the outside through pivoting doors (9, 11) with sealing members (10), a filling door (19) and a snap door (23).

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