Storage devices and operating methods for preventing sludge caking

Abstract

The present invention relates to a storage device, which comprises: a shell, the shell is provided with at least one feed port for conveying sludge to be stored into the storage device, at least one exhaust port and at least one discharge port for discharging the sludge; and at least one ventilation component, the at least one ventilation component is configured to convey a dry gas medium into the storage device, the at least one ventilation component is provided with at least one turning sub-assembly, the turning sub-assembly is configured to turn over the sludge in the storage device to prevent the sludge in the storage device from agglomerating and adhering to the inner surface of the side wall of the shell.

Description

Technical Field

[0001] The present invention relates to the technical field of sludge treatment, and more particularly to a storage device and an operating method. Background Art

[0002] With the rapid development of economy, the amount of urban domestic sewage is increasing. In order to meet the demand for urban sewage treatment, my country has accelerated the expansion of sewage treatment plants, so that sewage has been effectively controlled. At present, sewage treatment plants usually treat sludge by concentrating and conditioning first and then mechanically dehydrating it. The sewage is dehydrated to a water content of less than about 60%, and then it is collected in the corresponding storage bin for temporary storage, and then the treated sludge is subsequently landfilled, solidified, etc. Due to the high water content of dehydrated sludge, it is easy to ferment in the storage bin to form an arch layer or frame arch.

[0003] In order to further reduce the moisture content of the sludge after mechanical dehydration, some sewage treatment plants further dry the sludge after mechanical dehydration to reduce its moisture content to below 40%, and then incinerate it. Since the sludge treatment process from concentration to drying is complicated and time-consuming, and in most cases the sludge is treated intermittently or continuously in small quantities, the dried sludge usually needs to be collected in the corresponding temporary storage device, and after accumulating to a certain amount, it is distributed to transportation vehicles or other storage devices for transfer to the next treatment process.

[0004] During the process of the dried finished sludge being successively sent to the temporary storage device, the dried sludge itself has residual heat, and it is easy to absorb water vapor during the placement process, forming an arch layer or a bridge in the storage bin; at the same time, the sludge itself has residual heat, and it is easy to ferment under anaerobic conditions. In addition, the dried sludge that enters later will put pressure on the sludge already stored in the storage device, causing the sludge in the storage device to be squeezed and compacted or attached to the inner wall of the storage device. Therefore, when unloading, the sludge will easily form an arch or bridge in the storage device, causing blockage and causing unsmooth unloading. The sludge adhering to the inner wall of the storage device is not only difficult to clean, but also makes the inner wall of the storage device thicker and reduces its overall capacity.

[0005] Chinese invention patent CN103287756A discloses a sludge storage device, which includes a silo with a feed inlet and a discharge inlet, the silo includes a slanted bottom inclined downward and a flat bottom connected to the bottom of the slanted bottom, the feed inlet is arranged at the top of the silo above the top of the slanted bottom, the discharge inlet is arranged at the bottom of the silo at the end of the flat bottom away from the slanted bottom, and a baffle is arranged on the slanted bottom. However, due to the characteristics of strong viscosity, poor fluidity, easy agglomeration and difficult to break, the sludge is difficult to fall by its own weight. Therefore, in such a sludge storage device, the problem of poor unloading caused by bridging of sludge in the storage device will be difficult to avoid.

[0006] The method of breaking the arch of sludge in the storage device by vibrator or manually is also often considered to solve the above problem. Chinese utility model patent CN 204979840U discloses a storage device for high-dryness dehydrated sludge, wherein the storage device is provided with a dropping vibrator driven by a motor on the outside of the funnel portion arranged at the bottom, so as to vibrate the unloading sludge during the unloading process to prevent the sludge from bridging. However, for this storage device, firstly, since the vibrator is arranged on the outside of the storage device, it is difficult to break the arch of the sludge; secondly, the vibrator can only vibrate the unloading sludge during the unloading process, and still cannot avoid the formation of an arch layer during storage.

[0007] In addition, for the scheme of artificial arch breaking, since the sludge storage device is usually large and the working environment is poor, artificial arch breaking is difficult and time-consuming, and therefore often inefficient.

[0008] Therefore, in the field of sludge storage, there is a need for a storage device that can reduce the moisture content of the sludge in the storage device during sludge storage, thereby reducing fermentation and reducing the risk of dust explosion, and can also solve the problem of sludge arching in the storage device, thereby ensuring smooth unloading. Summary of the invention

[0009] According to one example of the present invention, a storage device is provided, comprising: a shell, the shell being provided with at least one feed port for conveying the sludge to be stored into the storage device, at least one exhaust port and at least one discharge port for discharging the sludge; and at least one ventilation assembly, the at least one ventilation assembly being configured to convey a dry gas medium into the storage device, the at least one ventilation assembly being provided with at least one turning subassembly, the turning subassembly being configured to turn over the sludge in the storage device to prevent the sludge in the storage device from arching and adhering to the inner surface of the side wall of the shell.

[0010] Preferably, each ventilation assembly includes a hollow shaft rotatably arranged in the shell, the hollow shaft extends along the longitudinal axis, includes a first end and an opposite closed second end and a side wall extending between the first end and the second end around the longitudinal axis, each ventilation assembly includes a medium inlet arranged at the first end of the hollow shaft, at least one medium outlet arranged in the side wall of the hollow shaft, and a medium channel arranged in the hollow shaft, a drying gas medium is introduced into the medium channel from the medium inlet and is led out from at least one medium outlet so as to dry the sludge.

[0011] Preferably, each flap subassembly comprises at least one flap member rotatably fixed to the hollow shaft.

[0012] Preferably, the flapping component is hollow and is in fluid communication with the medium channel of the hollow shaft, and the flapping component is provided with an outlet for discharging the dry gas medium.

[0013] Preferably, each flap subassembly comprises a plurality of flap components circumferentially arranged around the hollow shaft, the flap components comprising blades or ratchets.

[0014] At least one of the plurality of flipping parts is provided with a scrapeable part.

[0015] Preferably, the structures of the plurality of flipping parts are not completely the same.

[0016] Preferably, the flap member comprises a longitudinal fin extending along the longitudinal axis, the longitudinal fin being fixed to the hollow shaft and extending outwardly from an outer wall of the hollow shaft at an angle greater than 0 and less than 90 degrees.

[0017] Preferably, the storage device comprises at least two ventilation assemblies arranged side by side, and the flapping parts of adjacent ventilation assemblies are arranged in a staggered manner.

[0018] Preferably, flipping sub-assemblies are arranged on both sides of the discharge port.

[0019] Preferably, the drying gas medium includes any one of air, hot gas, compressed gas, cold gas, or chemical gas.

[0020] Preferably, the shell comprises a main body and an upper cover, and the at least one discharge port is arranged in the bottom plate of the main body.

[0021] Preferably, the shell further comprises a mud feeding device arranged in the upper cover, and at least one feeding port is arranged on a side wall of the mud feeding device.

[0022] Preferably, the material storage device further comprises an air supply device connected to the air inlet.

[0023] Preferably, the storage device further comprises a discharge device which is arranged at the discharge port and can be opened and closed.

[0024] Preferably, the material storage device further comprises an air exhaust device connected to the exhaust port.

[0025] Preferably, the material storage device further comprises a dust removal device connected to the exhaust port, for collecting and purifying exhaust gas or dust from the material storage device.

[0026] According to another example of the present invention, a method for operating the above-mentioned storage device is provided, comprising:

[0027] Start the air extraction device and mud extraction device;

[0028] Turning on the air supply device, introducing the dry gas medium into the medium channel through the air supply device, so that the dry gas medium enters the storage device evenly; and

[0029] Start the power input component: When the sludge accumulates in the storage bin to a certain amount, start the power input component to drive the hollow shaft to rotate, so that the flipping subassembly rotates together, making the sludge in the storage device loose, while enhancing the fluidity of the sludge to prevent the sludge from arching in the bin.

[0030] The present invention stirs the sludge through the turning subassembly and the air supply device to pass the dry gas medium into the hollow tube and into the storage device through the vent hole, so that the residual heat of the dried sludge can be effectively released; at the same time, the contact time between the dry gas medium and the sludge is increased, so that the dry medium can further take away the residual heat and moisture in the sludge, which can effectively prevent the sludge from rewetting and fermenting during the storage process; in addition, the turning subassembly turns the sludge in the arch bridge frame through the blades or ratchets arranged on the turning part, thereby preventing the sludge from accumulating in the storage room and forming an arch or a hardening, thereby preventing the sludge from blocking the discharge port and causing the problem of difficulty in unloading.

[0031] In addition, the present invention also provides a storage device, the storage device comprising:

[0032] a housing, wherein the housing is provided with at least one feed inlet for conveying the sludge to be stored into the storage device, at least one exhaust port, and at least one discharge port for discharging the sludge; and

[0033] The heat transfer component comprises a hollow shaft rotatably arranged in the shell and at least one flipping component fixed to the hollow shaft. The hollow shaft extends along the longitudinal axis and comprises a first end and an opposite second end and a side wall extending between the first end and the second end around the longitudinal axis. The heat transfer component comprises a heat transfer medium inlet arranged at the first end, a heat transfer medium outlet arranged in the second end, and a heat transfer medium channel arranged in the hollow shaft. The hollow interior of the flipping component is fluidically connected to the heat transfer medium channel of the hollow shaft through a hole on the hollow shaft. The flipping component and the hollow shaft do not have an outlet for discharging the heat transfer medium into the storage device, so that the heat transfer medium is introduced into the hollow shaft through the heat transfer medium inlet, passes through the heat transfer medium channel and enters the hollow interior of the flipping component, and indirectly exchanges heat with the sludge inside the storage device, which can effectively prevent sludge arching and also reduce the moisture content of the sludge and discharge it through the heat transfer medium outlet.

[0034] Other exemplary embodiments of the present invention will become apparent from the detailed description provided hereinafter.It should be understood that the detailed description and specific examples, while disclosing exemplary embodiments of the present invention, are intended for purposes of illustration only and are not intended to limit the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] At least one embodiment will be described below with reference to the following drawings, wherein like reference numerals represent like elements.

[0036] Figure 1 is a schematic cross-sectional view of an exemplary material storage device according to the present invention.

[0037] Figure 2 is a schematic cross-sectional view of another exemplary storage device according to the present invention.

[0038] Figure 3 is a perspective view of another exemplary storage device according to the present invention.

[0039] Figure 4 is a perspective view of a ventilation assembly according to another example of the present invention.

[0040] Figure 5 yes Figure 4 Cross-sectional view of the longitudinal fins of a ventilation assembly.

[0041] Figure 6 yes Figure 5 An enlarged view of portion “A” in FIG.

[0042] List of reference numerals:

[0043] 1: Storage device;

[0044] 3, 3a, 3b, 3c: ventilation components;

[0045] 4: Feed inlet;

[0046] 5: Discharge port;

[0047] 6: Exhaust port;

[0048] 201: Mud feeding device;

[0049] 202: Upper cover;

[0050] 203: Subject;

[0051] 204: Connecting device;

[0052] 205: unloading device;

[0053] 301, 301a, 301b, 301c: hollow shaft;

[0054] 3A1: first end;

[0055] 3A2: second end portion;

[0056] 302, 302a, 302b: flip sub-assembly;

[0057] 302c: Fin

[0058] 303, 303a, 303b, 303c: flipping parts;

[0059] 304, 304a, 304b, 304c: medium outlet;

[0060] 305: air supply device;

[0061] 306, 306c: medium channel. DETAILED DESCRIPTION

[0062] The following description is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.

[0063] like Figure 1 As shown, according to an example of the present invention, the storage device 1 has an internal space defined by a shell, and the shell includes an upper cover 202 and a main body 203. At least one feed port 4 is provided on the upper cover of the storage device to transport the dried sludge into the storage device, and at least one discharge port 5 is provided at the bottom of the shell to discharge the dried sludge from the storage device. Figure 1 Only one feed port 4 and one discharge port 5 are shown. It should be understood that the shell may include multiple feed ports 4 and / or multiple discharge ports 5 without exceeding the scope of the present invention. In another embodiment, the main body may also include a side wall and a bottom plate, and the feed port may be arranged on the side wall. In the example of the present invention, the storage device is used to store dried sludge. It should be understood that the storage device of the present invention may also be used to store semi-dried sludge or undried sludge without departing from the scope of the present invention.

[0064] According to an example of the present invention, a sludge feeding device 201 for injecting sludge into the storage device may also be provided in the storage device. A feeding port 4 for sludge to enter and an exhaust port 6 for exhaust gas to be discharged are provided on the side wall or upper cover of the sludge feeding device. When the feeding port 4 is provided on the side wall of the sludge feeding device, the dried sludge is sent to the sludge feeding device through the feeding port by a sludge pumping device (not shown) or / and a conveying device (not shown). At this time, since the dried sludge and the airflow enter the sludge feeding device together, under the action of the airflow, the dried sludge is introduced tangentially to cause a rotational motion, thereby generating an inertial centrifugal force in the sludge feeding device, causing the dried sludge to swirl in the sludge feeding device and enter the storage device, while the lighter dust or gas is discharged through the exhaust port 6 provided on the upper part of the sludge feeding device. Figure 1As shown, the mud feeding device 201 is a flange plate provided with a feed port 4 and an exhaust port 6. It should be understood that the mud feeding device 201 may also adopt any other suitable form without departing from the scope of the present invention. For example, the mud feeding device 201 may only be provided with a feed port 4, and the exhaust port 6 is provided in the upper cover 202.

[0065] According to an example of the present invention, the at least one feed port 4 is arranged in the mud feeding device 201, and the at least one discharge port 5 is arranged at the bottom of the main body 203. It should be understood that the at least one feed port 4 can also be arranged in the upper cover 202 without exceeding the scope of the present invention. It should also be understood that the at least one discharge port 5 can also be arranged at the lower part of the side wall of the main body 203 without exceeding the scope of the present invention.

[0066] According to an example of the present invention, the upper cover 202 and the main body 203 are formed in one piece. It should be understood that the upper cover 202 and the main body 203 may also be independent components and sealed together by welding or the like without exceeding the scope of the present invention.

[0067] According to one example of the present invention, the storage device 1 further comprises at least one ventilation assembly 3. At least one ventilation assembly 3 is configured to deliver dry gas medium into the storage device. According to one example of the present invention, the at least one ventilation assembly 3 is provided with at least one turning subassembly 302, and the turning subassembly is configured to turn over the sludge in the storage device to prevent the sludge in the storage device from agglomerating and adhering to the inner surface of the side wall of the shell.

[0068] like Figure 1 As shown, each ventilation assembly includes a hollow shaft 301 rotatably arranged in the housing, the hollow shaft extends along the longitudinal axis, includes a first end 3A1 and a relatively closed second end 3A2 and a side wall extending between the first end 3A1 and the second end 3A2 around the longitudinal axis, a medium inlet is arranged at the first end and at least one medium outlet 304 is arranged in the side wall, and the hollow shaft 301 is provided with a medium channel 306. Each ventilation assembly includes a medium inlet arranged at the first end of the hollow shaft, at least one medium outlet arranged in the side wall of the hollow shaft, and a medium channel arranged in the hollow shaft, and the dry gas medium is introduced into the medium channel from the medium inlet and is led out from at least one medium outlet so as to dry the sludge. The shape of the medium outlet 304 may include a trapezoid, a rectangle, a polygon, a triangle, an arch, a circle, etc. In other words, the medium outlet 304 has no restrictions on shape and quantity and can be determined as needed.

[0069] According to an example of the present invention, each ventilation assembly includes at least one flap subassembly 302, and each flap subassembly includes at least one flap component 303 rotatably fixed to the hollow shaft. Figure 1 As shown, the ventilation assembly 3 includes one or more flap components 303 arranged circumferentially around the hollow shaft 301. Figure 1 In the embodiment shown in , the hollow shaft 301 is transversely arranged in the housing 103. A plurality of flip subassemblies are positioned separately at intervals along the longitudinal direction of the hollow shaft 301. The flip parts 303 of each flip subassembly are positioned separately at intervals along the circumferential direction of the hollow shaft 301, and the number thereof can be the same or different. The structure and length of each flip part 303 can also be the same or different. However, the shape of the flip subassembly is not limited to this, and the flip subassembly can be designed into various configurations as needed. A flip subassembly can be arranged on the hollow shaft 301, and each flip subassembly can include one or more flip parts 303, such as blades or ratchets, and the blades or ratchets can be square in cross-sectional area, any shape such as circular arc, triangle, etc., or hollow square tubes, etc., without departing from the scope of the present invention. Preferably, the blade or ratchet can be set in a hollow shape to form a gas channel, and is provided with at least one exhaust port, which can be in any shape such as a triangle, square, rhombus, etc. One end of the blade or ratchet is connected to the hollow shaft so that the medium channel in the hollow shaft is connected to the gas channel of the blade or ratchet. The drying medium enters from the medium channel on the hollow shaft and passes through the gas channel of the blade or ratchet, and is finally discharged from the exhaust port and enters the storage bin. Figure 1 and 3 It is shown that each ventilation component 3 is provided with two flip sub-components spaced apart along the longitudinal axis of the hollow shaft 301, but it should be understood that each ventilation component 3 is provided with any other number of flip sub-components, such as 1, 3, 4, etc., without departing from the scope of the present invention.

[0070] Figure 2 A plurality of ventilation assemblies 3a, 3b are shown. Figure 2 Two ventilation assemblies 3a, 3b are shown, but it should be understood that each storage device may be provided with any other number of ventilation assemblies, such as 1, 3, 4, etc., without departing from the scope of the present invention.

[0071] According to an example of the present invention, the ventilation assembly 3a includes a hollow shaft 301a rotatably arranged in the housing, the hollow shaft is provided with at least one medium outlet 304a in the side wall, and the hollow shaft 301a is provided with a medium channel 306. According to an example of the present invention, each flip subassembly includes at least one flip component 303a rotatably fixed to the hollow shaft. Figure 2As shown, the ventilation assembly 3a includes at least one flip subassembly, each flip subassembly includes three flip parts 303a arranged circumferentially around the hollow shaft 301a. The number of flip parts 303a of each flip subassembly can be the same or different. The ventilation assembly 3b has a similar structure.

[0072] In addition, although the Figure 2 In the figure, each flip subassembly is shown to include three flip parts, but it should be understood that each flip subassembly is provided with any other number of flip parts, such as 1, 2, 4, etc., without departing from the scope of the present invention. In addition, the lengths of the plurality of blades or ratchets on each flip subassembly extending from the hollow shaft 301a, 301b may be different from each other.

[0073] At least one of the plurality of flap subassemblies may have a blade or ratchet with a longer length, while the other flap subassemblies may have a blade or ratchet with a shorter length. Although the blade or ratchet is welded to the hollow shaft 301 in the figure, other fixing methods such as bolting, riveting, etc. may also be used. In addition, the flap subassembly may be formed by connecting or fixing the blade or ratchet to a collar, a sleeve or a hub (not shown), and then installing the collar on the hollow shaft.

[0074] Each turning subassembly can be composed of one or more blades or ratchets 303 distributed circumferentially around the hollow shaft 301. The blades or ratchets 303 extend radially outward from the hollow shaft 301. The hollow shaft 301 can be driven to rotate by an external power device (not shown), causing the turning component 303 to rotate along with the rotation of the hollow shaft 301, so that the blades or ratchets 303 continuously turn over and hit the sludge in the storage device, thereby keeping the sludge loose and fragmented, enhancing the sludge fluidity, thereby effectively preventing the sludge from agglomerating or adhering to the inner surface of the side wall of the shell. In addition, the turning of the turning subassembly can also effectively release the residual heat brought by the dried sludge, thereby reducing the possibility of sludge fermentation.

[0075] Figure 3 is a perspective view of another exemplary storage device according to the present invention. Figure 2 The difference is that Figure 3The two ventilation components 3a and 3b are arranged staggered with each other. Specifically, the hollow shafts 301a and 301b of the two ventilation components 3a and 3b are closer to each other, so that the flipping part 303a of the first ventilation component 3a and the flipping part 303b of the second ventilation component 3b are arranged staggered, that is, the front end of the flipping part 303a of the first ventilation component 3a is close to the second hollow shaft 301b and is located between two adjacent flipping parts 303b, and vice versa. In this way, the axis distance between the first hollow shaft 301a and the second hollow shaft 301b is shortened, and interference between the first flipping subassembly and the second flipping subassembly is avoided.

[0076] According to one example of the present invention, a scraper component may be provided at the front end of the blade or ratchet of the flip subassembly. For example, all blades or ratchets on the flip subassembly have the same length, wherein the scraper component is provided at the front end of some blades or ratchets. In another example, all blades or ratchets on the flip subassembly have different lengths, wherein the scraper component is provided at the front end of some shorter blades or ratchets, and the front end of some longer blades or ratchets can be used as a scraper. In another example, all blades or ratchets on the flip subassembly have different lengths, wherein the front end of some longer blades or ratchets can be used as a scraper. Regardless of the form adopted, the front end of the scraper component fixed on the blade or ratchet should correspond to the discharge port. In addition, the front ends of the longer blades or ratchets of the flipping subassembly or the scraper components fixed on the blades or ratchets all face the discharge port, so that when scraping, the front ends of the longer blades or ratchets or the scraper components can either penetrate into the discharge port or sweep over the discharge port, so as to scrape away the sludge in or near the discharge port, thereby eliminating the sludge that is built up in the storage bin. The flipping subassembly can also be arranged to be slightly offset from the discharge port or / and arranged on both sides of the discharge port, so that the front ends of its longer blades or ratchets or the scraper components only sweep over a portion of the width of the discharge port when scraping, thereby only scraping away a portion of the sludge near the discharge port, thereby eliminating the sludge that is built up in the storage bin.

[0077] According to an example of the present invention, adjacent flip subassemblies with longer blades or ratchets or blades or ratchets equipped with scraping components and a flip subassembly with shorter blades or ratchets on the same hollow shaft can form a group, and each group of flip subassemblies on the first hollow shaft 301a and each group of flip subassemblies on the second hollow shaft 301b are arranged alternately, so that a group of flip subassemblies on the first hollow shaft 301a is located between two adjacent groups of flip subassemblies on the second hollow shaft 301b.

[0078] It will be understood by those skilled in the art that only exemplary embodiments of the flip subassembly are shown in the accompanying drawings, and various modifications of the flip subassembly can be realized as needed. For example, although only one flip subassembly is shown in the accompanying drawings in the housing, multiple flip subassemblies can be provided in the housing 103 of the storage device 1 as needed. For example, a flip subassembly can be provided on each side of the discharge port 5, thereby facilitating the flipping of the compacted sludge or the arched sludge at the discharge port, so that the unloading is smooth. Preferably, adjacent flip subassemblies in the multiple flip subassemblies are arranged in a staggered arrangement, for example, the blades or ratchets on the flipping parts of the adjacent flip subassemblies are arranged to be staggered, so that the structure of the storage device is more compact. In other embodiments, the ventilation assembly 3 can also be arranged longitudinally in the housing. In addition, the ventilation assembly can also be fixed to the corresponding side wall of the housing by any appropriate fastening method. The ventilation assembly can also be designed into various other structures as needed. For example, the flipping part 303 can include more or less blades or ratchets, and the structures of the blades or ratchets on each flipping part 303 can also be different from each other.

[0079] According to an example of the present invention, the turning member 303 is hollow and is in fluid communication with the medium channel 306 of the hollow shaft. In this case, the hollow turning member 303 is disposed in the medium outlet 304 of the hollow shaft 301 and is provided with an outlet for discharging the dry gas medium. By providing a hollow turning member and providing an outlet for discharging the dry gas medium on the turning member, the dry gas medium can be more evenly distributed to the sludge to be stored.

[0080] Dry gas medium, such as air, hot gas, compressed gas, cold air, etc., can be fed into the inner space of the storage device 1 through the air inlet provided on the corresponding side wall of the main body 203. The air inlet can be communicated with the air supply device 305, and the air supply device 305 can be, for example, an air blowing device, a fan or a gas pressurizing device, etc. It should be understood that the air supply device 305 can also adopt any other suitable form without departing from the scope of the present invention.

[0081] According to an example of the present invention, the storage device is provided with an exhaust device at the exhaust port for discharging the tail gas in the mud feeding device to ensure the air pressure balance or negative pressure state operation in the storage device, and the exhaust device can be any exhaust device suitable for the present technical solution, such as an induced draft device, an exhaust device, or an exhaust fan. A dust removal device can also be provided at the exhaust port 6 to collect and purify the tail gas or dust from the mud feeding device or the storage device, so as to achieve standard emission. Of course, the present invention can also remove the mud feeding device, and directly provide an exhaust port and an exhaust device for discharging the tail gas on the upper cover of the storage device housing.

[0082] In order to prevent the sludge in the storage device from being directly discharged from the discharge port 5, a discharge device 205 for discharging the sludge from the storage device is provided at the discharge port. The discharge device 205 may be a variety of discharge devices such as a pressure valve discharge device, a gate valve, a solenoid valve, a flap mechanism, etc. During the discharge, the discharge device 205 at the discharge port 5 is opened, and the sludge in the storage device 1 is discharged from the discharge port.

[0083] In the case of receiving the material discharged from the discharge port 5 by tank truck transportation, a connection device or a conveying device for connection can usually be provided between the discharge device 205 and the tank truck inlet to prevent dust from overflowing and causing environmental pollution due to incomplete sealing during the discharge process. In addition, an air duct can be provided on the connection device or / and the conveying device at the connection port with the tank truck, which is interconnected with the exhaust device at the exhaust port to eliminate the leakage of dust generated during the discharge process.

[0084] Now combine Figure 1-3 The operation of the storage device of the present invention is described.

[0085] Start the air exhaust device and the mud extraction device: First, start the air exhaust device (not shown) connected to the exhaust port 6, and then start the mud extraction device to transport the dried sludge into the mud device 201 through the mud extraction pipe. The dried sludge swirls in the mud feeding device 201 with the help of centrifugal force, and finally falls into the storage device under the action of the sludge's own gravity. The dust and gas generated in this process are extracted and discharged through the air exhaust device, and the exhaust port 6 is connected to the dust removal device (not shown).

[0086] Turn on the air supply device: introduce the dry gas medium into the hollow tube through the air supply device, and discharge it through the medium outlet 304 on the hollow tube, so that the dry gas medium enters the storage device evenly.

[0087] Start the power input component (not shown): When the sludge accumulates in the storage bin to a certain amount, start the power input component to drive the hollow shaft to rotate, causing the flipping subassembly to rotate together, making the sludge in the storage device loose, while enhancing the fluidity of the sludge to prevent the sludge from arching in the bin.

[0088] Tail gas treatment: The dry gas medium after contacting the sludge rises from bottom to top in the storage device and is extracted through the exhaust device connected to the exhaust port 6. The generated tail gas can be discharged after dust removal, heat recovery and other treatments, or sent back to the storage bin after purification, heating and other treatments.

[0089] Sludge unloading: When the sludge needs to be transported, the unloading device at the discharge port 5 is opened, and the sludge is unloaded from the storage bin to a transportation device such as a vehicle through the discharge port 5.

[0090] According to another example of the present invention, at least one flap subassembly may include longitudinal fins, such as Figure 4-6 As shown, the storage device includes a ventilation component 3c, the ventilation component 3c includes a hollow shaft 301c, the hollow shaft 301c extends along the longitudinal axis, includes a first end and an opposite closed second end and a side wall extending between the first end and the second end around the longitudinal axis, a medium inlet is provided at the first end and at least one medium outlet 304c is provided in the side wall, and the hollow shaft 301c is provided with a medium channel 306c. The shape of the medium outlet 304c can include a trapezoid, a rectangle, a polygon, a triangle, an arch, a circle, etc. In other words, the medium outlet 304c has no restrictions on shape and quantity and can be determined as needed.

[0091] The ventilation assembly 3c further includes longitudinal fins 302c, which are fixed to the hollow shaft and extend outward from the outer wall of the hollow shaft. Figure 6 As shown, the thickness of the longitudinal fin 302c is T, the center line of the longitudinal fin 302c is F, and the thickness T of the longitudinal fin 302c is the dimension in the direction perpendicular to the center line F. Figure 6 In the example, the thickness T of the longitudinal fin 302c remains substantially unchanged. It should be understood that the thickness T of the longitudinal fin 302c may vary, for example, the thickness T of the longitudinal fin 302c at the end away from the hollow shaft 301c may be reduced without departing from the scope of the present invention. The tangential direction of the longitudinal axis of the hollow shaft 301c is H, the direction in which the longitudinal fin 302c extends from point O of the hollow shaft 301c is G, and the angle between the tangential direction H and the extension direction G is α. According to an example of the present invention, α is an angle greater than 0 degrees and less than 90 degrees, preferably, α is an angle greater than 0 degrees and less than 60 degrees, more preferably, α is an angle greater than 10 degrees and less than 50 degrees, and most preferably, α is an angle greater than 15 degrees and less than 35 degrees. In another embodiment, at least one blade or ratchet may be provided on the longitudinal fin 302c, which is conducive to eliminating the arching sludge in the storage bin.

[0092] Next reference Figure 4-6 The operation of the storage device of the present invention is described.

[0093] Start the air exhaust device and the mud extraction device: First, start the air exhaust device connected to the exhaust port 6, then start the mud extraction device, and transport the dried sludge into the mud device 201 through the mud extraction pipe. The dried sludge swirls in the mud feeding device 201 with the help of centrifugal force, and finally falls into the storage device under the action of the sludge's own gravity. The dust and gas generated in this process are extracted and discharged through the air exhaust device, and the exhaust port 6 is connected to the dust removal device (not shown).

[0094] Turn on the air supply device: introduce the dry gas medium into the hollow tube through the air supply device, and discharge it through the medium outlet 304c on the hollow tube, so that the dry gas medium enters the storage device evenly.

[0095] Start the power input component: When the sludge accumulates in the storage bin to a certain amount, start the power input component to drive the hollow shaft to rotate. The ventilation component can not only distribute the dry gas medium to the area near the hollow tube more evenly or in a predetermined manner through the medium outlet on the side wall of the hollow tube in the storage device, but also prevent the sludge from adhering to the side wall of the hollow tube through its own structure and rotation, thereby ensuring the smooth flow of the dry gas medium.

[0096] Tail gas treatment: The dry gas medium after contacting the sludge rises from bottom to top in the storage device and is extracted through the exhaust device connected to the exhaust port 6. The generated tail gas can be discharged after dust removal, heat recovery and other treatments, or sent back to the storage bin after purification, heating and other treatments.

[0097] Sludge unloading: When the sludge needs to be transported, the unloading device at the discharge port 5 is opened, and the sludge is unloaded from the storage bin to a transportation device such as a vehicle through the discharge port 5.

[0098] The present invention stirs the sludge through the turning subassembly and the air supply device to pass the dry gas medium into the hollow tube and into the storage device through the vent hole, so that the residual heat of the dried sludge can be effectively released; at the same time, the contact time between the dry gas medium and the sludge is increased, so that the dry medium can further take away the residual heat and moisture in the sludge, which can effectively prevent the sludge from rewetting and fermenting during the storage process; in addition, the turning subassembly turns the sludge in the arch bridge frame through the blades or ratchets arranged on the turning part, thereby preventing the sludge from accumulating in the storage room and forming an arch or a hardening, thereby preventing the sludge from blocking the discharge port and causing the problem of difficulty in unloading.

[0099] In another optional embodiment not shown, the present invention further provides a storage device having an internal space defined by a shell, wherein the shell is provided with at least one feed port for conveying the sludge to be stored into the storage device, at least one exhaust port, and at least one discharge port for discharging the sludge.

[0100] The storage device also includes a heat transfer assembly, which includes a hollow shaft rotatably arranged in the shell and at least one flipping component fixed to the hollow shaft, the hollow shaft extends along the longitudinal axis, includes a first end and an opposite second end and a side wall extending between the first end and the second end around the longitudinal axis, the heat transfer assembly includes a heat transfer medium inlet arranged at the first end, a heat transfer medium outlet arranged in the second end, and a heat transfer medium channel arranged in the hollow shaft, the hollow interior of the flipping component is in fluid communication with the heat transfer medium channel of the hollow shaft through the hole on the hollow shaft, the flipping component and the hollow shaft have no outlet for discharging the heat transfer medium into the storage device, so that the heat transfer medium is introduced into the hollow shaft through the heat transfer medium inlet, passes through the heat transfer medium channel and enters the hollow interior of the flipping component, at this time, heat is transferred to the interior of the storage device through the outer wall of the hollow shaft and the flipping component, and indirectly heat exchanges with the sludge and is discharged through the heat transfer medium outlet. It should be understood that, in addition to the ventilation assembly, the other features described above for the storage device 1 are also applicable to the storage device with a heat transfer assembly.

[0101] The heat transfer medium may be hot oil, hot gas, steam, etc. The sludge in the storage bin is dried by indirect heat transfer, thereby effectively reducing the moisture content of the sludge in the storage bin and reducing sludge fermentation.

[0102] The present invention has described certain preferred embodiments and variations thereof. Other variations and changes may occur to those skilled in the art after reading and understanding the specification. Thus, the present invention is not limited to the specific embodiments disclosed as the best mode for carrying out the present invention, and the present invention will include all embodiments falling within the scope of the claims.

Claims

1. A material storage device, comprising: A housing, the housing being provided with an air inlet, at least one feed inlet for conveying the sludge to be stored into the storage device, at least one air outlet and at least one discharge outlet for discharging the sludge; as well as at least one ventilation assembly, the at least one ventilation assembly being configured to convey the dry gas medium into the storage device, the at least one ventilation assembly being provided with at least one turning subassembly, the turning subassembly being configured to turn over the sludge in the storage device to prevent the sludge in the storage device from arching and adhering to the inner surface of the side wall of the shell, Each ventilation assembly includes a hollow shaft rotatably arranged in the shell, the hollow shaft extends along the longitudinal axis, includes a first end and an opposite closed second end and a side wall extending between the first end and the second end around the longitudinal axis, each ventilation assembly includes a medium inlet arranged at the first end of the hollow shaft, at least one medium outlet arranged in the side wall of the hollow shaft, and a medium channel arranged in the hollow shaft, the dry gas medium is introduced into the medium channel from the medium inlet and led out from at least one medium outlet so as to dry the sludge, each flipping subassembly includes at least one flipping component rotatably fixed to the hollow shaft, the flipping component includes a longitudinal fin extending along the longitudinal axis, the longitudinal fin is fixed to the hollow shaft and extends outward from the outer wall of the hollow shaft at an angle greater than 0 and less than 60 degrees relative to the tangential direction to prevent sludge from adhering to the side wall of the hollow tube, thereby ensuring smooth flow of the dry gas medium.

2. The material storage device according to claim 1, wherein: The flapping component is hollow and is in fluid communication with the medium channel of the hollow shaft. The flapping component is provided with an outlet for discharging the dry gas medium.

3. The material storage device according to claim 1, wherein: Each flap subassembly includes a plurality of flap components disposed circumferentially around the hollow shaft, the flap components including blades or ratchets.

4. The material storage device according to claim 3, wherein: At least one of the plurality of flipping parts is provided with a scrapeable part.

5. The material storage device according to claim 1, wherein: The structures of the multiple flip parts are not completely the same.

6. The material storage device according to claim 1, wherein: The ends of the longitudinal fins facing away from the hollow shaft have a decreasing thickness.

7. The material storage device according to claim 1, wherein: The material storage device comprises at least two ventilation assemblies arranged side by side, and the flapping parts of adjacent ventilation assemblies are arranged in a staggered manner.

8. The material storage device according to claim 7, wherein: Flipping sub-assemblies are arranged on both sides of the discharge port.

9. The material storage device according to claim 1, wherein: The dry gas medium includes any one of air, hot gas, compressed gas, cold gas, or chemical gas.

10. The storage device according to any one of claims 1 to 9, wherein: The shell comprises a main body and an upper cover, and the at least one discharge port is arranged in the bottom wall of the main body.

11. The material storage device according to claim 10, wherein: The shell further comprises a mud feeding device arranged in the upper cover, and at least one feeding port is arranged on a side wall of the mud feeding device.

12. The material storage device according to claim 10, wherein: The material storage device also includes an air supply device connected to the air inlet.

13. The material storage device according to claim 10, wherein: The material storage device also includes a discharge device which is arranged at the material discharge port and can be opened and closed.

14. The material storage device according to claim 10, wherein: The material storage device further comprises an air suction device connected to the exhaust port.

15. The material storage device according to claim 10, wherein: The material storage device further comprises a dust removal device connected to the exhaust port, for collecting and purifying tail gas or dust from the material storage device.

16. A method of operating the storage device according to claim 1, comprising: Start the air extraction device and mud extraction device; The air supply device is turned on, and the dry gas medium is introduced into the medium channel through the air supply device, so that the dry gas medium enters the storage device evenly; as well as When the sludge accumulates in the storage bin to a certain amount, the power input component is started to drive the hollow shaft to rotate, causing the flipping subassembly to rotate together, making the sludge in the storage device loose, while enhancing the fluidity of the sludge to prevent the sludge from arching in the bin.

17. A material storage device, comprising: A housing, wherein the housing is provided with at least one feed inlet for conveying the sludge to be stored into the storage device, at least one exhaust port, and at least one discharge port for discharging the sludge; as well as A heat transfer component, comprising a hollow shaft rotatably arranged in the housing and at least one flipping component fixed to the hollow shaft, wherein the hollow shaft extends along a longitudinal axis and comprises a first end and an opposite second end and a side wall extending between the first end and the second end around the longitudinal axis, the heat transfer component comprises a heat transfer medium inlet arranged at the first end, a heat transfer medium outlet arranged in the second end, and a heat transfer medium channel arranged in the hollow shaft, the hollow interior of the flipping component is in fluid communication with the heat transfer medium channel of the hollow shaft through a hole on the hollow shaft, and the flipping component The component and the hollow shaft do not have an outlet for discharging the heat transfer medium into the storage device, so that the heat transfer medium is introduced into the hollow shaft through the heat transfer medium inlet, passes through the heat transfer medium channel and enters the hollow interior of the flipping component, performs indirect heat exchange with the sludge inside the storage device, and is discharged through the heat transfer medium outlet. The flipping component includes longitudinal fins extending along the longitudinal axis, and the longitudinal fins are fixed to the hollow shaft and extend outward from the outer wall of the hollow shaft at an angle greater than 0 and less than 60 degrees relative to the tangential direction to prevent sludge from adhering to the side wall of the hollow tube, thereby ensuring smooth flow of the dry gas medium.

Images