A sludge low temperature drying box

Abstract

The invention provides a sludge low-temperature drying box, which relates to the technical field of sludge treatment, and comprises a box body, a mud barrel, a heat pump system, a circulating fan, a flow distribution carrier plate, and a drainage plate. The mud barrel comprises: a frame base, a barrel body, a short hinge, a long hinge and a hanging assembly. The invention improves the structure of the mud barrel, and adopts a plurality of long hinges connected end to end in a linear manner inside. When the sludge is contained, the sludge is located in a triangular area between the long hinge and the inside of the barrel body. The accumulated sludge is separated by the triangular area, and the sludge at the bottom layer is prevented from being compacted, so that the box has good air permeability, and ensures smooth gas flow during the low-temperature drying process. When the sludge is unloaded, an electric hoist can be directly used to pull up the hanging assembly, and then the hinge can be stretched upward, so that the plurality of long hinges connected end to end in a linear manner become a vertical state, and the sludge automatically falls, so that the unloading is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of sludge treatment, in particular to a sludge low-temperature drying box. Background Art

[0002] The box-type low-temperature sludge dryer uses the refrigeration system of the heat pump dryer to cool and dehumidify the humid air from the drying chamber through a closed circulation of air between the drying chamber and the heat pump dryer. When the humid air passes through the heat pump evaporator, the heat absorbed by the internal low-pressure refrigerant changes from liquid to gas, and most of the condensed water is discharged due to the cooling of the air, which can reduce the moisture content in the sludge by more than 50%.

[0003] The box-type low-temperature sludge dryer is generally used to re-treat the sludge after being treated by the filter press, so that the water content of the sludge reaches 10% to 40% (dry sludge), which is beneficial to the subsequent utilization of the sludge. The mud drum of the traditional box-type low-temperature sludge dryer is not convenient for unloading the dried sludge when in use, and in the process of containing the sludge, the sludge at the bottom is relatively dense due to the high sludge layer, which is not conducive to the flow of airflow. For this reason, the present invention provides a new type of sludge low-temperature drying box. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a sludge low-temperature drying box, which solves the problem that the mud drum of the traditional box-type low-temperature sludge dryer is inconvenient to unload the dried sludge during use, and in the process of containing the sludge, the sludge at the bottom is relatively dense due to the high sludge layer, which is not conducive to the flow of air.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A sludge low-temperature drying box comprises a box body, wherein a sludge drying chamber for air circulation and a heat pump system installation chamber are arranged inside the box body;

[0007] A mud cylinder is arranged inside the sludge drying chamber, and a plate door is arranged on the side of the sludge drying chamber;

[0008] The mud tube comprises:

[0009] A frame-type base, wherein a forklift hole beam is fixedly connected to the inner side of the frame-type base;

[0010] A cylinder, both ends of which are open, and the bottom end of which is fixedly connected to the top of the frame-shaped base;

[0011] A short hinge, wherein a first end of the short hinge is hinged to a forklift eye beam;

[0012] A long hinge, wherein the long hinge is provided in a plurality, and the plurality of the long hinges are linearly hinged end to end, the bottom end of the long hinge located at the bottom is hinged to the second end of the short hinge, and the top end of the long hinge located at the top is connected to a hanging assembly;

[0013] The long hinged member is a porous plate member.

[0014] Preferably, the forklift hole beams are provided with two groups;

[0015] The interior of the cylinder is fixedly connected with a breathable partition, and the breathable partition divides the interior of the cylinder into two equal-sized flat channels;

[0016] The short hinges and the long hinges are each provided in two groups, and the two groups of the short hinges and the long hinges correspond to the two flat channels respectively.

[0017] Preferably, the number of the long hinges in each group is an odd number, and the hanging assembly comprises:

[0018] A square frame, the square frame is located above the air-permeable baffle, and a cross brace is fixedly connected to the inner side of the square frame, and a lifting ear is fixedly installed on the top of the cross brace;

[0019] A suspension nipple, the top of which is fixedly connected to the side of the square frame, and two groups of the suspension nipple are provided, and the two groups of the suspension nipple are respectively located inside the two flat channels;

[0020] A swing frame, wherein the top of the swing frame is hinged to the bottom of the swing frame, and the bottom of the swing frame is hinged to the top end of the long hinged member located at the top.

[0021] Preferably, the short hinged member comprises: an hinged seat and a short connecting rod, the hinged seat is fixedly connected to the forklift hole beam, the bottom end of the short connecting rod is hinged to the hinged seat, and the top end of the short connecting rod is hinged to the bottom end of the long hinged member located at the bottom.

[0022] Preferably, a heat pump system and a circulating fan are arranged inside the heat pump system installation room, and a flow dividing carrier plate and a flow guide plate are arranged between the sludge drying room and the heat pump system installation room. After the airflow is heated by the condenser of the heat pump system, the circulating fan provides airflow power to make the airflow pass through the flow dividing carrier plate, the mud cylinder, the flow guide plate, the evaporator of the heat pump system in sequence, and then enter the condenser circulation of the heat pump system;

[0023] The flow distribution carrier plate is located at the bottom of the box body, and the flow guide plate is located at the top of the box body.

[0024] Preferably, a filter assembly is fixedly installed inside the heat pump system installation chamber and at the air outlet end of the guide plate, and an auxiliary heating assembly is fixedly installed inside the heat pump system installation chamber and below the evaporator of the heat pump system.

[0025] Preferably, the filter assembly is a bag filter dust removal element, and the auxiliary heating assembly is an electric heating wire mesh.

[0026] Preferably, a condensate drainage member is provided at the evaporator of the heat pump system, and a drainage pipe is provided at the end of the condensate drainage member.

[0027] Preferably, it also includes:

[0028] A C-shaped protection frame, wherein a frame platform is fixedly installed on the inner side of the C-shaped protection frame;

[0029] The electric hoist is arranged above the frame platform, and a double hook is fixedly installed on the steel wire of the electric hoist.

[0030] Preferably, a temperature sensing unit is provided inside the diversion carrier.

[0031] The present invention provides a sludge low-temperature drying box. It has the following beneficial effects:

[0032] The present invention improves the structure of the mud barrel and adopts a plurality of long hinges connected end to end in a linear manner. When the sludge is contained, the sludge is located in the triangular area between the long hinges and the inside of the barrel. The accumulated sludge is separated by the triangular area to prevent the sludge at the bottom from being compacted, thereby having better air permeability and ensuring smooth gas flow during the low-temperature drying process. When the sludge is unloaded, an electric hoist can be directly used to pull up the hanging assembly, and then the hinge can be stretched upward, so that the plurality of long hinges connected end to end in a linear manner become a vertical state, and the sludge can automatically fall down, thereby facilitating unloading.

[0033] The sludge low-temperature drying box in the present invention is an integrated system structure, which can be used directly after being powered on, and does not need to be coordinated with other systems. It is suitable for various scenarios such as sewage treatment plants and industrial sludge treatment workshops. The sludge low-temperature drying box consumes less energy and has high drying efficiency. It can greatly reduce the moisture content of the sludge, laying a solid foundation for the subsequent harmless and resource-based disposal of the sludge.

[0034] The present invention has a breathable partition fixedly connected to the inside of the cylinder, which divides the inside of the cylinder into two equal-sized flat channels, and a short hinge and a long hinge are arranged inside the two flat channels, thereby forming two sets of parallel structures, which can accommodate more sludge at the same time, ensure that the sludge will not be dense at the bottom due to accumulation, and facilitate synchronous unloading. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A three-dimensional diagram of a sludge low-temperature drying box proposed by the present invention;

[0036] Figure 2This is a front view of a sludge low-temperature drying box proposed by the present invention;

[0037] Figure 3 A top view of a sludge low-temperature drying box proposed by the present invention;

[0038] Figure 4 for Figure 3 Section view of the section line at AA;

[0039] Figure 5 A three-dimensional view of a mud barrel of a sludge low-temperature drying box proposed by the present invention;

[0040] Figure 6 A three-dimensional view of a long hinged part inside a mud cylinder of a sludge low-temperature drying box proposed by the present invention;

[0041] Figure 7 A three-dimensional view of a hanging assembly of a sludge low-temperature drying box proposed by the present invention;

[0042] Figure 8 This is a schematic diagram of the unloading of a sludge low-temperature drying box proposed by the present invention.

[0043] Among them, 1. box body; 2. plate door; 3. diversion carrier plate; 4. drainage plate; 5. filter assembly; 6. heat pump system; 6a. evaporator; 6b. condenser; 7. auxiliary heating assembly; 8. circulating fan; 9. mud cylinder; 901. frame base; 902. cylinder body; 903. breathable partition; 904. forklift hole beam; 905. short hinge; 905a. hinge seat; 905b. short connecting rod; 906. long hinge; 907. hanging assembly; 907a. square frame; 907b. cross brace; 907c. lifting ear; 907d. suspension short section; 907e. swing frame; a. sludge drying chamber; 10. electric hoist; 11. C-type protection frame; 12. frame platform; 13. double hook. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] Example

[0046] like Figure 1-Figure 8As shown, the embodiment of the present invention provides a sludge low-temperature drying box, including a box body 1, wherein a sludge drying chamber a for air circulation and a heat pump system installation chamber are arranged inside the box body 1; a mud barrel 9 is arranged inside the sludge drying chamber a, and the mud barrel 9 is used to hold sludge, and a plate door 2 is arranged on the side of the sludge drying chamber a, and the plate door 2 is a single-door structure, and an operator can open the plate door 2 to take out / put in the mud barrel 9 in the sludge drying chamber a; a heat pump system 6 (generally a heat pump system includes an evaporator, a compressor, a condenser, an expander) is arranged inside the heat pump system installation chamber Expansion valve, pipeline, etc.), circulating fan 8, a diverter plate 3 and a guide plate 4 are arranged between the sludge drying chamber a and the heat pump system installation chamber. The diverter plate 3 and the guide plate 4 are both porous plate structures. The diverter plate 3 is a thickened steel plate for supporting the mud cylinder 9 and the air outlet. The guide plate 4 is used for returning the air intake. After the airflow is heated by the condenser 6b of the heat pump system 6, the circulating fan 8 provides the airflow power to make the airflow pass through the diverter plate 3, the mud cylinder 9, the guide plate 4, the evaporator 6a of the heat pump system 6 in turn, and then enter the condenser 6b of the heat pump system 6 for circulation.

[0047] The sludge low temperature drying box is used to process the sludge after being processed by the filter press. The water content of this part of the sludge is 40%-80%, and the sludge is in the form of fragments. It can be guided into the mud barrel 9 by a conveyor, and then the mud barrel 9 is sent to the sludge drying chamber a by a forklift, and the sludge low temperature drying box is started and dried for about 12 hours. During the operation of the sludge low temperature drying box, the heat pump system 6 and the circulating fan 8 work, and the heat pump system 6 provides power to the airflow, so that the airflow circulates inside the sludge drying chamber a and the heat pump system installation room. Since the box body 1 is a sealed structure, it can completely avoid toxic , harmful gas overflows and affects the surrounding environment. The airflow is heated when passing through the condenser 6b of the heat pump system 6, and then passes through the circulating fan 8 and the diversion carrier plate 3, and then the hot air flows through the mud cylinder 9. The hot air flows through the gaps in the sludge in the mud cylinder 9, carrying the moisture in the sludge and becoming a warm and humid airflow, and then passes through the guide plate 4 and the evaporator 6a of the heat pump system 6. The warm and humid airflow is cooled and dehumidified in the evaporator 6a of the heat pump system 6, and the moisture in the airflow is liquefied, and then is guided out of the box 1, and the dry gas enters the condenser 6b of the heat pump system 6 again for reheating and circulation.

[0048] Specifically, the mud barrel 9 includes: a frame-type base 901 , a barrel body 902 , a short hinge 905 , a long hinge 906 and a hanging assembly 907 .

[0049] A forklift hole beam 904 is fixedly connected to the inner side of the frame base 901. The forklift hole beam 904 is a thickened square tube structure, and both ends of the forklift hole beam 904 are open, which is convenient for the forklift's fork legs to be inserted into the inner side of the forklift hole beam 904, so as to facilitate the forklift to transport the mud cylinder 9. Both ends of the cylinder body 902 are open, and the bottom end of the cylinder body 902 is fixedly connected to the top of the frame base 901. The length and width of the frame base 901 are larger than the cylinder body 902. Generally, the cylinder body 902 is connected to the top of the frame base 901. Some auxiliary plates are fixedly connected on the top, and then the cylinder 902 is welded and fixed. The first end of the short hinge 905 is hinged to the forklift hole beam 904. There are several long hinges 906, and the several long hinges 906 are linearly hinged end to end. The bottom end of the long hinge 906 at the bottom is hinged to the second end of the short hinge 905, and the top end of the long hinge 906 at the top is connected to the hanging assembly 907, and the long hinge 906 is a porous plate.

[0050] When loading sludge into the mud barrel 9, first adjust the lowest long hinge 906 to a tilted state, with both ends of the lowest long hinge 906 stuck in the mud barrel 9, and place a proper amount of sludge in the lowest long hinge 906; then adjust the second lowest long hinge 906 to a tilted state, with both ends of the second lowest long hinge 906 stuck in the mud barrel 9, and place a proper amount of sludge in the second lowest long hinge 906, and so on, until a proper amount of sludge is placed on the top long hinge 906.

[0051] In order to facilitate the discharge of the dried sludge in the mud barrel 9, the present solution further designs a C-shaped protection frame 11, a frame platform 12, an electric hoist 10 and a double hook 13.

[0052] The C-type protection frame 11 is fixedly installed on the ground, and a frame platform 12 is fixedly installed on the inner side of the C-type protection frame 11, so that the frame platform 12 is in a raised state. The frame platform 12 is used to place the mud barrel 9. The electric hoist 10 is arranged above the frame platform 12, and a double hook 13 is fixedly installed on the steel wire of the electric hoist 10. Generally, the electric hoist 10 is fixedly installed on the beam of the factory building (or installed on a bracket). When in use, the mud barrel 9 is transferred to the frame platform 12 by a forklift, and then the double hook 13 is hung on the hanging assembly 907. The electric hoist 10 is energized and collected on the steel wire, and the steel wire rope pulls up the hanging assembly 907, and then the long hinge 906 is pulled upward. The multi-section long hinge 906 can be pulled into a vertical state, and the sludge falls naturally.

[0053] In one embodiment, in order to better utilize the internal space of the cylinder 902 and design the structure of the forklift hole beam 904, two groups of forklift hole beams 904 are provided, corresponding to the two fork legs of the forklift, and the interior of the cylinder 902 is fixedly connected with a breathable partition 903, and the breathable partition 903 is a porous steel plate structure. The breathable partition 903 divides the interior of the cylinder 902 into two equal-sized flat channels; two groups of short hinges 905 and long hinges 906 are provided, and the two groups of short hinges 905 and long hinges 906 correspond to the two flat channels respectively.

[0054] The above structure is reasonably designed and can make the best use of the internal space of the cylinder 902, and the long hinge 906 is not designed to be too long (compared with the long hinge 906 tilted and placed horizontally in the mud cylinder 9, it is more reasonable to tilt the long hinge 906 horizontally in the flat channel, and the long hinge 906 is not designed to be too long).

[0055] In one embodiment, the number of each set of long hinges 906 is an odd number, such as Figure 6 As shown in FIG. 1 , the number of each set of long hinged members 906 is three, and the hanging assembly 907 includes: a square frame 907a, a suspension short section 907d, and a swing frame 907e.

[0056] The square frame 907a is located above the breathable partition 903, and a cross brace 907b is fixedly connected to the inner side of the square frame 907a. The cross brace 907b is used to increase the structural strength of the square frame 907a, and the top of the cross brace 907b can also be fixedly installed with a lifting ear 907c. The lifting ear 907c is convenient for lifting and connection. The top of the suspension short section 907d is fixedly connected to the side of the square frame 907a. There are two groups of suspension short sections 907d. The two groups of suspension short sections 907d are respectively located inside the two flat channels. The top of the swing frame 907e is hinged to the bottom end of the swing frame 907e, and the bottom of the swing frame 907e is hinged to the top of the long hinge 906 located at the top.

[0057] The long hinged member 906 at the top is in an inclined state. When it is hoisted, the top end will move upward and horizontally. By designing a swingable swing frame 907e, the hoisting process can be smooth.

[0058] In one embodiment, the short hinge 905 includes: an hinge seat 905a and a short connecting rod 905b. The hinge seat 905a is fixedly connected to the forklift hole beam 904, the bottom end of the short connecting rod 905b is hinged to the hinge seat 905a, and the top end of the short connecting rod 905b is hinged to the bottom end of the long hinge 906 located at the bottom. When the bottom long hinge 906 is vertical, it is located in the middle of the flat channel. When the bottom long hinge 906 is tilted and placed horizontally, it is located on the side wall of the flat channel. Therefore, the short connecting rod 905b is used for transition so that the bottom end of the bottom long hinge 906 can change its position.

[0059] In one embodiment, the diverter plate 3 is located at the bottom of the box body 1, and the guide plate 4 is located at the top of the box body 1. The diverter plate 3 uses a thickened steel plate, which is not only used for the outflow of airflow, but also for supporting the mud tube 9. The guide plate 4 has no requirement on thickness.

[0060] In one embodiment, a filter assembly 5 is fixedly installed inside the heat pump system installation room and at the air outlet end of the guide plate 4. The filter assembly 5 is a bag-type filter dust removal component. The filter assembly 5 is used to filter dust in the airflow (the airflow may carry dust when passing through the sludge inside the mud barrel 9) to prevent the dust from affecting the normal operation of the evaporator 6a of the heat pump system 6. An auxiliary heating assembly 7 is fixedly installed inside the heat pump system installation room and below the evaporator 6a of the heat pump system 6. The auxiliary heating assembly 7 is an electric heating wire mesh. When the airflow temperature is insufficient, the auxiliary heating assembly 7 can be used to auxiliary heat the airflow.

[0061] Generally, the temperature of the airflow out of the shunt carrier 3 is guaranteed to be around 90°C with an upper and lower error of 5°C. A temperature sensing unit is provided inside the shunt carrier 3. When the temperature sensing unit detects that the temperature is lower than the normal value, the auxiliary heating component 7 can participate in the gas heating work.

[0062] In one embodiment, a condensate drainage component is provided at the evaporator 6a of the heat pump system 6. The condensate drainage component is a stainless steel shell component. The warm and humid gas will be cooled and liquefied when it comes into contact with the evaporator 6a, and the generated water droplets will be collected by the condensate drainage component and guided to the end of the condensate drainage component. A drainage pipe is provided at the end of the condensate drainage component for draining away the condensed water.

[0063] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A sludge low-temperature drying box, comprising a box body (1), wherein the box body (1) is provided with a sludge drying chamber (a) for air circulation and a heat pump system installation chamber, characterized in that: A mud cylinder (9) is arranged inside the sludge drying chamber (a), and a panel door (2) is arranged on the side of the sludge drying chamber (a); The mud cylinder (9) comprises: A frame-shaped base (901), wherein a forklift hole beam (904) is fixedly connected to the inner side of the frame-shaped base (901); A cylinder (902), both ends of the cylinder (902) are open, and the bottom end of the cylinder (902) is fixedly connected to the top of the frame-shaped base (901); A short hinge (905), wherein a first end of the short hinge (905) is hinged to a forklift eye beam (904); A long hinge (906), wherein the long hinge (906) is provided in a plurality, and the plurality of long hinges (906) are linearly hinged end to end, the bottom end of the long hinge (906) located at the bottom is hinged to the second end of the short hinge (905), and the top end of the long hinge (906) located at the top is connected to a hanging assembly (907); The long hinged member (906) is a porous plate member.

2. A sludge low temperature drying box according to claim 1, characterized in that: The forklift hole beam (904) is provided with two groups; A breathable partition (903) is fixedly connected to the interior of the cylinder (902), and the breathable partition (903) divides the interior of the cylinder (902) into two equal-sized flat channels; The short hinges (905) and the long hinges (906) are each provided in two groups, and the two groups of the short hinges (905) and the long hinges (906) correspond to the two flat channels respectively.

3. A sludge low temperature drying box according to claim 2, characterized in that: The number of the long hinges (906) in each group is an odd number, and the hanging assembly (907) comprises: A square frame (907a), the square frame (907a) being located above the air-permeable baffle (903), and a cross brace (907b) being fixedly connected to the inner side of the square frame (907a), and a lifting ear (907c) being fixedly installed on the top of the cross brace (907b); A suspension short section (907d), the top of which is fixedly connected to the side of the square frame (907a), and two groups of the suspension short sections (907d) are provided, and the two groups of the suspension short sections (907d) are respectively located inside the two flat channels; A swing frame (907e), wherein the top of the swing frame (907e) is hinged to the bottom end of the suspension short section (907d), and the bottom of the swing frame (907e) is hinged to the top end of the long hinged member (906) located at the top.

4. The sludge low temperature drying box according to claim 1, characterized in that: The short hinged member (905) comprises: an hinged seat (905a) and a short connecting rod (905b); the hinged seat (905a) is fixedly connected to the forklift eye beam (904); the bottom end of the short connecting rod (905b) is hinged to the hinged seat (905a); and the top end of the short connecting rod (905b) is hinged to the bottom end of the long hinged member (906) located at the bottom.

5. The sludge low temperature drying box according to claim 1, characterized in that: The heat pump system installation room is provided with a heat pump system (6) and a circulation fan (8), and a flow distribution carrier plate (3) and a flow guide plate (4) are provided between the sludge drying room (a) and the heat pump system installation room. After the airflow is heated by the condenser (6b) of the heat pump system (6), the circulation fan (8) provides airflow power so that the airflow passes through the flow distribution carrier plate (3), the mud cylinder (9), the flow guide plate (4), and the evaporator (6a) of the heat pump system (6) in sequence, and then enters the condenser (6b) of the heat pump system (6) for circulation; The flow distribution carrier plate (3) is located at the bottom of the box body (1), and the flow guide plate (4) is located at the top of the box body (1).

6. The sludge low temperature drying box according to claim 5, characterized in that: A filter assembly (5) is fixedly arranged inside the heat pump system installation room and at the air outlet end of the guide plate (4), and an auxiliary heating assembly (7) is fixedly arranged inside the heat pump system installation room and below the evaporator (6a) of the heat pump system (6).

7. The sludge low temperature drying box according to claim 6, characterized in that: The filter component (5) is a bag-type filter dust removal component, and the auxiliary heating component (7) is an electric heating wire mesh.

8. The sludge low temperature drying box according to claim 5, characterized in that: The evaporator (6a) of the heat pump system (6) is provided with a condensate drainage member, and a drainage pipe is provided at the end of the condensate drainage member.

9. The sludge low temperature drying box according to claim 1, characterized in that: Also includes: A C-shaped protection frame (11), wherein a frame platform (12) is fixedly mounted on the inner side of the C-shaped protection frame (11); An electric hoist (10) is arranged above a frame platform (12), and a double hook (13) is fixedly mounted on a steel wire of the electric hoist (10).

10. The sludge low temperature drying box according to claim 5, characterized in that: A temperature sensing unit is arranged inside the flow dividing carrier plate (3).

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