Combined sludge drying device

Abstract

The utility model belongs to the technical field of sludge treatment, and discloses a combined sludge drying device which comprises a drying barrel, and a waste gas treatment structure and a waste heat utilization structure which are positioned below the drying barrel, the waste gas treatment structure comprises a purification box, an air inlet fan mounted on the left side of the purification box and communicated with the purification box, and an n-shaped pipe communicated with the air inlet fan, and the waste gas treatment structure is matched with the waste heat utilization structure, so that when sludge is dried, gas enters the purification box, and the waste gas in the purification box is discharged out of the purification box; the primary-efficiency filter screen can effectively intercept large particles and impurities, the medium-efficiency filter screen and the high-efficiency filter screen can filter out smaller particles and part of harmful gas, the purification degree of the gas is gradually improved, and after the gas penetrates through the three filter screens, harmful substances and peculiar smell molecules in the gas can be adsorbed in rich pores of activated carbon, so that the purification effect of the gas is improved. Therefore, the efficient filtering effect is achieved, and pollution of waste gas to air is reduced to a great extent.

Description

Technical Field

[0001] The utility model belongs to the technical field of sludge treatment, in particular to a combined sludge drying device. Background Art

[0002] With the rapid development of modern industry, a huge amount of various types of urban domestic sludge and industrial sludge emerges every year around the world. Among them, various sewage and wastewater treatment plants will produce a large amount of wet sludge with high water content. Due to its high water content, these wet sludges are in urgent need of drying before entering the incinerator for incineration or being used for other purposes. Sludge drying technology, as a common and effective means, can effectively reduce the water content of sludge, thereby providing great convenience for its subsequent treatment links. Specifically, sludge drying technology refers to the use of sludge drying equipment to carry out targeted heating operations on sludge. Through the precisely controlled heating process, the water in the sludge is evaporated to achieve an efficient, energy-saving and environmentally friendly drying effect, ensuring that while reducing the water content, the useful components of the sludge are retained to the greatest extent and reducing adverse effects on the environment.

[0003] The shortcomings of the existing combined sludge drying device: During the entire process of sludge drying, a huge amount of waste gas will inevitably be generated. If these waste gases are directly discharged into the external environment without any treatment, they will cause serious and non-negligible pollution to the surrounding ecological environment. These waste gases may contain various harmful substances that will have a bad impact on air quality, endanger the health of surrounding organisms, and destroy the ecological balance. It is also worth noting that there is actually a certain amount of waste heat in these discharged waste gases. If it is directly discharged, this part of the waste heat that could have been effectively utilized will not be able to play its due value. This is not only inconsistent with the principles of energy conservation and recycling, but also reduces energy utilization efficiency. In the long run, it is not conducive to sustainable development and environmental protection. Utility Model Content

[0004] In order to solve the problems raised in the above background technology, the utility model provides a combined sludge drying device.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a combined sludge drying device, comprising a drying barrel and an exhaust gas treatment structure and a waste heat utilization structure located below the drying barrel;

[0006] The exhaust gas treatment structure includes a purification box and an air intake fan installed on the left side of the purification box and connected to the purification box, and an N-type pipe connected to the air intake fan. The inner wall of the purification box is provided with a primary filter, a medium-efficiency filter and a high-efficiency filter from left to right. An activated carbon layer and a zeolite layer are provided on the right side of the high-efficiency filter and located inside the purification box. An exhaust pipe is provided on the back of the purification box.

[0007] The waste heat utilization structure includes an extraction fan assembled on the front of the purification box and a transmission pipe connected to the extraction fan.

[0008] Preferably, it also includes a material unloading structure located in the drying barrel, and the material unloading structure includes a servo motor fixedly installed on the left side of the drying barrel and a dragon rod fixedly connected to the output end of the servo motor.

[0009] Preferably, an air supply pipe, a recovery pipe and a discharge pipe are sequentially connected from left to right above the drying barrel, and a hot air filling pipe is connected to the inner wall of the drying barrel.

[0010] Preferably, a discharge trough is provided on the inner wall of the drying barrel and below the discharge pipe, and the interior of the discharge trough is connected to a discharge hopper.

[0011] Preferably, the other end of the n-type tube is connected to the top of the air supply tube, and the other end of the transmission tube is connected to the top of the recovery tube.

[0012] Preferably, a support leg is provided below the purification box, and the top of the support leg is fixedly connected to the lower edge of the outer wall of the drying barrel.

[0013] Preferably, the inner wall of the purification box is provided with a plug-in slot adapted to the primary filter, the medium-efficiency filter and the high-efficiency filter.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] The utility model cooperates the exhaust gas treatment structure with the waste heat utilization structure, so that when the sludge is dried, the harmful gases generated will be quickly sucked into the n-type tube through the air supply pipe under the rotation of the air intake fan. At this time, the gas enters the purification box. Inside the purification box, the primary filter can effectively intercept larger particles and impurities, and the medium-efficiency filter and high-efficiency filter can filter out smaller particles and some harmful gases, gradually improving the purification degree of the gas. After the gas passes through these three filters, the harmful substances and odor molecules therein will be adsorbed in the pores rich in activated carbon, thereby achieving an efficient filtering effect and greatly reducing exhaust gas It effectively protects the quality of the surrounding environment by preventing air pollution. The treated gas still carries a certain amount of waste heat. Then, under the high-speed rotation of the extraction fan, these gases with waste heat are strongly driven and enter the recovery pipe through the transmission pipe. Finally, these gases containing waste heat enter the drying barrel smoothly to heat and dry the sludge in the barrel. In this way, the waste heat that might have been wasted is fully utilized, which not only improves the energy utilization efficiency and reduces the energy consumption of the entire sludge drying process, but also further accelerates the sludge drying process, shortens the processing time, and realizes the maximum utilization of resources and the improvement of economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a front view structural diagram of the entire utility model excluding the transmission tube;

[0018] Figure 3 This is a schematic diagram of the left side structure of the entire utility model excluding the n-type tube;

[0019] Figure 4 This is a schematic diagram of the blanking structure of the utility model;

[0020] Figure 5 This is a schematic diagram of the top view of the purification box of the utility model;

[0021] Figure 6 This is a schematic diagram of the cross-sectional structure of the purification box of the present utility model.

[0022] In the figure: 1. Drying barrel; 11. Air supply pipe; 12. Recovery pipe; 13. Discharge pipe; 14. Hot air filling pipe; 15. Discharge hopper; 16. Support legs; 2. Waste gas treatment structure; 21. Purification box; 22. Intake fan; 23. N-type pipe; 24. Primary filter; 25. Medium-efficiency filter; 26. High-efficiency filter; 27. Activated carbon layer; 28. Zeolite layer; 29. Discharge pipe; 3. Waste heat utilization structure; 31. Extraction fan; 32. Transmission pipe; 4. Discharge structure; 41. Servo motor; 42. Dragon rod. DETAILED DESCRIPTION

[0023] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0024] like Figures 1 to 6 As shown, the utility model provides a combined sludge drying device, comprising a drying barrel 1 and an exhaust gas treatment structure 2 and a waste heat utilization structure 3 located below the drying barrel 1;

[0025] The exhaust gas treatment structure 2 includes a purification box 21 and an air intake fan 22 installed on the left side of the purification box 21 and connected to the purification box 21, and an n-type pipe 23 connected to the air intake fan 22. The inner wall of the purification box 21 is provided with a primary filter 24, a medium-efficiency filter 25 and a high-efficiency filter 26 from left to right. An activated carbon layer 27 and a zeolite layer 28 are provided to the right of the high-efficiency filter 26 and located inside the purification box 21. An exhaust pipe 29 is provided on the back of the purification box 21.

[0026] The waste heat utilization structure 3 includes an extraction fan 31 mounted on the front of the purification box 21 and a transmission pipe 32 connected to the extraction fan 31 .

[0027] The above scheme is adopted: by cooperating with the waste gas treatment structure 2 and the waste heat utilization structure 3, the harmful gases generated during sludge drying will be quickly sucked into the n-type tube 23 through the air supply pipe 11 under the rotation of the air intake fan 22. At this time, the gas enters the purification box 21, and inside the purification box 21, the primary filter 24 can effectively intercept larger particles and impurities, the medium efficiency filter 25 and the high efficiency filter 26 can filter out smaller particles and some harmful gases, and gradually improve the degree of gas purification. When the gas passes through these three filters, the harmful substances and odor molecules therein will be adsorbed in the pores rich in activated carbon, thereby achieving an efficient filtering effect, greatly The waste gas pollution to the air is effectively reduced, and the quality of the surrounding environment is effectively protected. The treated gas still carries a certain amount of waste heat. Then, under the high-speed rotation of the extraction fan 31, these gases with waste heat are strongly driven and enter the recovery pipe 12 through the transmission pipe 32. Finally, these gases containing waste heat smoothly enter the drying barrel 1 to heat and dry the sludge in the barrel. In this way, the waste heat that might have been wasted is fully utilized, which not only improves the energy utilization efficiency and reduces the energy consumption of the entire sludge drying process, but also further accelerates the sludge drying process, shortens the processing time, and realizes the maximum utilization of resources and the improvement of economic benefits.

[0028] like Figures 1 to 6 As shown, it also includes a discharge structure 4 located in the drying barrel 1, and the discharge structure 4 includes a servo motor 41 fixedly installed on the left side of the drying barrel 1 and a dragon rod 42 fixedly connected to the output end of the servo motor 41. The air supply pipe 11, the recovery pipe 12 and the discharge pipe 13 are connected to the top of the drying barrel 1 from left to right in sequence, and the inner wall of the drying barrel 1 is connected to the hot air filling pipe 14.

[0029] The above scheme is adopted: when the servo motor 41 is started, it can effectively drive the dragon rod 42 to start rotating. During the rotation of the dragon rod 42, a driving force will be generated, which can effectively drive the sludge to flow in a specific direction, gradually advance toward the position of the discharge hopper 15 and realize circulation. In addition, one-way valves are carefully arranged on the inner walls of the discharge pipe 29, the air supply pipe 11 and the recovery pipe 12. The working mechanism makes the flow of gas have a clear direction. Specifically, the gas can only be discharged outward through the discharge pipe 29, and the external gas cannot enter in the opposite direction through the discharge pipe 29. Similarly, the gas can only be discharged through the air supply pipe 11, and the external gas cannot enter through the air supply pipe 11. For the recovery pipe 12, the gas can only enter from the outside and cannot be discharged outward through the recovery pipe 12. Such strict one-way flow control effectively ensures the orderly flow of gas in each pipeline and avoids the confusion and efficiency reduction that may be caused by gas backflow.

[0030] like Figures 1 to 6 As shown, a discharge trough is provided on the inner wall of the drying barrel 1 and below the discharge pipe 13. The interior of the discharge trough is connected to the discharge hopper 15. The other end of the n-type tube 23 is connected to the top of the air supply pipe 11, and the other end of the transmission pipe 32 is connected to the top of the recovery pipe 12.

[0031] The above solution is adopted: the transmission pipe 32 and the recovery pipe 12 are interconnected, and under the action of the extraction fan 31, the gas with waste heat can be efficiently transmitted to the drying barrel 1, thereby successfully achieving the effect of waste heat recovery. Through this ingenious design, the energy utilization rate is greatly improved and the energy consumption of the entire sludge drying process is reduced. When the sludge drying work is successfully completed, the gas can be discharged smoothly through the discharge pipe 29, and the position of the discharge hopper 15 is specially provided with a valve that can effectively block the outflow of air and sludge, and this valve is normally in a normally closed state. This design is intended to ensure the stability and safety of the environment inside the drying barrel 1. Only when the air in the drying barrel 1 is completely extracted and the sludge drying meets the expected standards and requirements, can the valve be opened for discharge operation. Such a strict control process not only ensures the quality and effect of sludge drying, but also effectively prevents problems such as material leakage and energy loss that may occur when the ideal state is not reached, thereby improving the operation efficiency and reliability of the entire sludge drying device.

[0032] like Figures 1 to 6 As shown, a support leg 16 is provided below the purification box 21, and the top of the support leg 16 is fixedly connected to the lower edge of the outer wall of the drying barrel 1. The inner wall of the purification box 21 is provided with a plug-in slot compatible with the primary filter 24, the medium efficiency filter 25 and the high efficiency filter 26.

[0033] With the above solution, the primary filter 24, the medium-efficiency filter 25 and the high-efficiency filter 26 can be cleaned or replaced through the plug-in slots to achieve a good air filtering effect.

[0034] The working principle and use process of this utility model:

[0035] First, when the sludge is dried, the harmful gas generated will be quickly sucked into the n-type tube 23 through the air supply pipe 11 under the rotation of the air intake fan 22, and then the gas will enter the purification box 21. At this time, the primary filter 24 in the purification box 21 will play a role first, effectively intercepting larger particles and impurities. After passing through the primary filter 24, the medium efficiency filter 25 and the high efficiency filter 26 will further filter the gas to remove smaller particles and some harmful gases, gradually improving the degree of gas purification. After the gas passes through the above three filters, the harmful substances and odor molecules in it will be removed by the activated carbon. Rich pore adsorption achieves efficient filtering effect, greatly reduces the pollution of exhaust gas to the air, and effectively protects the quality of the surrounding environment. The treated gas still carries a certain amount of waste heat. Then, under the high-speed rotation of the extraction fan 31, these gases with waste heat are driven and enter the recovery pipe 12 through the transmission pipe 32. Finally, the gas containing waste heat smoothly enters the drying barrel 1 to heat and dry the sludge in the barrel. In this way, the waste heat that might have been wasted is fully utilized, which not only improves the energy utilization efficiency and reduces the energy consumption of the sludge drying process, but also speeds up the sludge drying process.

[0036] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A combined sludge drying device, characterized by: It comprises a drying barrel (1), and an exhaust gas treatment structure (2) and a waste heat utilization structure (3) located below the drying barrel (1); The exhaust gas treatment structure (2) comprises a purification box (21), an air intake fan (22) installed on the left side of the purification box (21) and connected to the purification box (21), and an n-type tube (23) connected to the air intake fan (22); the inner wall of the purification box (21) is provided with a primary filter (24), a medium-efficiency filter (25) and a high-efficiency filter (26) in sequence from left to right; an activated carbon layer (27) and a zeolite layer (28) are provided on the right side of the high-efficiency filter (26) and located inside the purification box (21); and an exhaust pipe (29) is provided on the back side of the purification box (21); The waste heat utilization structure (3) comprises an extraction fan (31) mounted on the front of the purification box (21) and a transmission pipe (32) connected to the extraction fan (31).

2. The combined sludge drying device according to claim 1, characterized in that: The invention also includes a material discharge structure (4) located on the drying barrel (1), wherein the material discharge structure (4) includes a servo motor (41) fixedly mounted on the left side of the drying barrel (1) and a dragon rod (42) fixedly connected to the output end of the servo motor (41).

3. The combined sludge drying device according to claim 1, characterized in that: An air supply pipe (11), a recovery pipe (12) and a discharge pipe (13) are sequentially connected from left to right above the drying barrel (1), and a hot air filling pipe (14) is connected to the inner wall of the drying barrel (1).

4. The combined sludge drying device according to claim 1, characterized in that: A discharge trough is provided on the inner wall of the drying barrel (1) and below the discharge pipe (13), and the interior of the discharge trough is connected to a discharge hopper (15).

5. The combined sludge drying device according to claim 3, characterized in that: The other end of the n-type tube (23) is connected to the top end of the air supply tube (11), and the other end of the transmission tube (32) is connected to the top end of the recovery tube (12).

6. The combined sludge drying device according to claim 1, characterized in that: A support leg (16) is provided below the purification box (21), and the top of the support leg (16) is fixedly connected to the lower edge of the outer wall of the drying barrel (1).

7. The combined sludge drying device according to claim 1, characterized in that: The inner wall of the purification box (21) is provided with a plug-in slot adapted to the primary filter (24), the medium filter (25) and the high efficiency filter (26).

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