Preheating air supply end cover of stirring dryer
By setting a preheating channel in the end cover shell of the agitator dryer and preheating the filled air using the heat exchange chamber, the temperature fluctuation problem caused by the direct entry of external air is solved, and the stability and efficiency of sludge drying treatment are improved.
Patent Information
- Application Number
- CN202422708624.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-07
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-11-07
AI Technical Summary
During the sludge drying process, external air directly enters the working chamber of the stirring dryer, causing temperature fluctuations, affecting the drying treatment effect.
A preheating channel is provided in the end cover housing of the agitator dryer, and the replenished air is preheated through the first and second heat exchange chambers to avoid direct entry into the working chamber and increase the length of the gas flow path to achieve sufficient preheating.
It effectively avoids temperature fluctuations in the working chamber and ensures the stability and efficiency of sludge drying treatment.
Smart Images
Figure CN223268535U_ABST
Abstract
Description
Technical Field
[0001] The invention discloses a preheating air supply end cover of a stirring dryer, belonging to the technical field of stirring machines. Background Art
[0002] Due to its high water content, sludge is not conducive to its transportation and subsequent disposal. In the various sludge disposal methods adopted, such as agricultural use, landfill, incineration, and utilization as building materials, the premise is that the sludge's moisture content must meet relevant requirements, so the sludge needs to be dried. In the prior art, the most common equipment for sludge drying is the stirring dryer, which is equipped with a stirring shaft and paddles on the surface of the stirring shaft. When the stirring shaft rotates, the paddles drive the sludge and heat the stirring dryer to complete the sludge drying process.
[0003] Since the sludge itself contains a variety of harmful substances, the harmful substances will evaporate due to heat during the above-mentioned drying process of the sludge in the mixing dryer. Therefore, it is necessary to evacuate the working chamber during the mixing and drying process, and the extracted gas must be subjected to secondary treatment to meet the emission standards.
[0004] During the vacuuming process, a vacuum is gradually formed inside the mixer dryer. External air is then continuously drawn into the working chamber under negative pressure to replenish the air. However, the operating temperature inside the mixer dryer is relatively high, and direct inflow of external air into the working chamber can cause significant temperature fluctuations within the working chamber, further impacting the sludge drying process. Utility Model Content
[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a preheating air supply end cover for a stirring dryer, in which a preheating channel is set in the end cover shell so that the air supplied into the stirring dryer is preheated in the preheating channel, thereby avoiding direct entry of external air into the working chamber and causing large temperature fluctuations in the working chamber.
[0006] The technical solution adopted by the utility model to solve the technical problem is: the preheating air-supply end cover of the stirring dryer includes an end cover shell, which is characterized in that an air-supply inlet and an air-supply outlet are provided at the end of the end cover shell, the air-supply outlet is connected to the stirring dryer, and a preheating channel is provided in the end cover shell, and the gas enters the preheating channel through the air-supply inlet and is output from the air-supply outlet.
[0007] Preferably, the preheating channel includes a first heat exchange chamber and a second heat exchange chamber, the first heat exchange chamber and the second heat exchange chamber are connected end to end, the air supply inlet is located at the inlet of the first heat exchange chamber, and the air supply outlet is located at the outlet of the second heat exchange chamber.
[0008] Preferably, the first heat exchange chamber and the second heat exchange chamber are respectively located at the top and bottom of the end cover shell, and the first transition chamber and the second transition chamber are respectively provided at both ends of the end cover shell. The end of the first heat exchange chamber and the head end of the second heat exchange chamber are connected through the first transition chamber, and the second transition chamber and the air supply outlet are connected through the second transition chamber.
[0009] Preferably, a feed port is provided on the surface of the end cover shell, and the feed port passes through the first heat exchange cavity and the second heat exchange cavity.
[0010] Preferably, a preheating chamber is provided between the first heat exchange chamber and the second heat exchange chamber, and vertical partitions are provided at both ends of the preheating chamber. The vertical partitions at both ends are spaced apart from the inner wall of the end cover shell to form a first transition chamber and a second transition chamber.
[0011] Preferably, a waste gas exhaust port is provided on the surface of the end cover shell, which passes through the first heat exchange chamber and is connected to the preheating chamber. A waste gas output port is provided on the bottom surface of the end cover shell, which passes through the second heat exchange chamber and is connected to the preheating chamber.
[0012] Preferably, a waste gas exhaust port is provided on the surface of the end cover shell, and the waste gas exhaust port simultaneously passes through the first heat exchange chamber, the preheating chamber and the second heat exchange chamber.
[0013] Compared with the prior art, the present invention has the following beneficial effects:
[0014] In the preheating air supply end cover of the stirring dryer, a preheating channel is provided in the end cover shell, and the air supplied into the stirring dryer is preheated in the preheating channel, thereby preventing external air from directly entering the working chamber and causing large temperature fluctuations in the working chamber.
[0015] The preheating channel is connected twice by the first heat exchange chamber and the second heat exchange chamber end to end. When the gas that needs to be replenished into the working chamber flows through the preheating channel, the length of its flow path is increased, thereby achieving sufficient preheating. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is the axonometric drawing of the mixing dryer.
[0017] Figure 2 This is the front view of the mixing dryer.
[0018] Figure 3 This is a top view of the end cover of the stirring dryer.
[0019] Figure 4 for Figure 3 rear view.
[0020] Figure 5 for Figure 3 Right view of .
[0021] Figure 6 for Figure 3 Bottom view of .
[0022] Figure 7 for Figure 3 Middle AA section view.
[0023] Figure 8 for Figure 6 Middle BB section view.
[0024] Figure 9 for Figure 6 Center CC section view.
[0025] Figure 10 Example 2 corresponds to Example 1 Figure 7 view.
[0026] Among them: 1, reducer 2, end cover 3, suction fan 4, suction pipe 5, feed pipe 6, stirring shaft 7, base 8, shell 9, drive motor 10, air supply connector 11, feed port 12, end cover shell 13, exhaust gas exhaust port 14, air supply outlet 15, air supply inlet 16, exhaust gas output port 17, vertical partition 18, first heat exchange chamber 19, second heat exchange chamber 20, preheating chamber 21, first transition chamber 22, second transition chamber 23, circulation port 24, cavity connecting port. DETAILED DESCRIPTION
[0027] Figures 1 to 9 This is the best embodiment of the present invention, Figures 1 to 10 The utility model is further described.
[0028] Example 1:
[0029] like Figures 1 and 2 As shown, a stirring dryer includes a base 7, with a housing 8 disposed on top of the base 7. Housing 8 contains a working chamber for stirring and drying. Two stirring shafts 6 are horizontally disposed within housing 8. A reducer 1 and a drive motor 9 are disposed on the surface of the base 7, located on the same side of the housing 8. The drive motor 9 drives the two stirring shafts 6 to rotate within the housing 8 through the reducer 1, stirring and drying the sludge within the housing 8.
[0030] The upper end of the housing 8 is sealed by an end cap 2, and a feed pipe 5 is provided on the surface of the end cap 2, through which the sludge enters the housing 8. A suction fan 3 is also provided on the top of the housing 8, the air inlet end of the suction fan 3 is connected to the housing 8 through the end cap 2, and the air outlet end of the suction fan 3 is connected to one end of the suction pipe 4, and the outlet of the suction pipe 4 is connected to an external exhaust gas treatment unit.
[0031] As in the prior art, the outer shell 8 comprises an outer shell and an inner shell, wherein the outer shell is sleeved on the outside of the inner shell, and a layer is formed between the outer shell and the inner shell. A coil is provided in the layer, and high-temperature steam is introduced into the coil to heat the shell 8.
[0032] like Figures 3-5 As shown, the end cap 2, which is located at the upper end of the housing 8, includes an end cap housing 12, which is rectangular in shape. A feed inlet 11 and an exhaust outlet 13 are provided on the surface of the end cap housing 12. The feed inlet 11 is connected to the feed pipe 5, and the exhaust outlet 13 is connected to the air inlet of the suction fan 3. A set of air supply outlets 14 are provided at the end of the end cap housing 12. An air supply connector 10 is provided at the end face of the housing 8. The air supply outlets 14 are connected to the outer port of the air supply connector 10 via a pipeline, and the inner port of the air supply connector 10 is connected to the interior of the housing 8.
[0033] Combine Figures 6-9 Three chambers are horizontally arranged in the end cover shell 12: a first heat exchange chamber 18, a preheating chamber 20, and a second heat exchange chamber 19. The first heat exchange chamber 18, the preheating chamber 20, and the second heat exchange chamber 19 are arranged in sequence from top to bottom, and adjacent chambers are separated by a partition arranged horizontally in the end cover shell 12. A vertical partition 17 is also provided at both ends of the preheating chamber 20. Two independent transition chambers are also formed between the vertical partitions 17 on both sides and the inner wall of the end cover shell 12: a first transition chamber 21 and a second transition chamber 22. An air supply inlet 15 is provided at the end of the first heat exchange chamber 18. The air supply inlet 15 and the air supply outlet 14 are located at the same end of the end cover shell 12.
[0034] The feed port 11 sequentially passes through the first heat exchange chamber 18, the preheating chamber 20, and the second heat exchange chamber 19 before connecting to the working chamber. The exhaust gas outlet 13 passes through the first heat exchange chamber 18 before connecting to the preheating chamber 20. Exhaust gas outlets 16 are also provided at the four corners of the bottom surface of the end cover housing 12. These outlets 16 extend upward through the second heat exchange chamber 19 before connecting to the preheating chamber 20.
[0035] Multiple circulation ports 23 are provided at the ends of the upper and lower horizontal partitions of the preheating chamber 20. Two sets of circulation ports 23 are connected to the first transition chamber 21, respectively. Thus, these two sets of circulation ports 23 provide communication between the first heat exchange chamber 18 and the second heat exchange chamber 19. A cavity communication port 24 is also provided at the end of the horizontal partition at the bottom of the preheating chamber 20. This port is located at the other end of the circulation ports 23 and connects the second transition chamber 22 and the second heat exchange chamber 19. The aforementioned air supply outlet 14 communicates with the second transition chamber 22 from the side of the end cap housing 12.
[0036] The specific working process and working principle are as follows: the sludge to be treated is fed into the housing 8 through the feed pipe 5. The drive motor 9 located on the surface of the base 7 drives the two stirring shafts 6 to rotate through the reducer 1 to stir the sludge.
[0037] While the stirring and drying process is being carried out in the working chamber, the suction fan 3 extracts the waste gas generated by the drying and stirring in the working chamber. Since the suction fan 3 continuously discharges the waste gas in the working chamber, it is necessary to simultaneously replenish gas in the working chamber to avoid an excessive vacuum state in the working chamber. When a vacuum state is formed in the working chamber due to the exhaust gas discharge, under the action of the vacuum state, the external air enters the first heat exchange chamber 18 through the air supply inlet 15 at the end of the end cover shell 12. After flowing through the first heat exchange chamber 18, the external air enters the first transition chamber 21 through the circulation port 23. Due to the obstruction of the vertical partition 17, it cannot enter the preheating chamber 20, so it enters the second preheating chamber 19 through the lower circulation port 23 again, and then enters the second transition chamber 22 through the second preheating chamber 19 and the cavity connecting port 24. After passing through the second transition chamber 22, it enters the air supply outlet 14, and then enters the working chamber through the air supply outlet 14 and the air supply joint 10 to replenish the working chamber.
[0038] During the aforementioned air replenishment process, the exhaust gas passes through the exhaust gas outlets 16 at the four corners and directly enters the preheating chamber 20, filling the preheating chamber 20. Due to the high temperature of the exhaust gas, it preheats the gas to be replenished into the working chamber before entering the suction fan 3 and being discharged. Therefore, the gas to be replenished into the working chamber is replenished only after it has been preheated by the preheating chamber 20, preventing external air from directly entering the working chamber and causing large temperature fluctuations within the working chamber.
[0039] Furthermore, when the gas that needs to be replenished into the working chamber flows through the above process, the length of its flow path is increased, thereby achieving sufficient preheating.
[0040] Example 2:
[0041] like Figure 10 As shown, the difference between this embodiment and embodiment 1 is that: in this embodiment, the preheating chamber 20 is omitted, and only the first heat exchange chamber 18 and the second heat exchange chamber 19 are retained, and the feed port 11 and the end cover shell 12 simultaneously pass through the end cover shell 8 and are directly connected to the working chamber.
[0042] Because end cap 2 is located at the upper port of the working chamber, it has a relatively high temperature. Therefore, in this embodiment, a preheating chamber 20 is not provided. Instead, the high temperature of end cap 2 is utilized to preheat the air to be supplied to the working chamber as it flows through first heat exchange chamber 18 and second heat exchange chamber 19. Although the end cap 2 in this embodiment is slightly less effective at preheating the gas than the end cap 2 in Example 1, this embodiment reduces the structural complexity of end cap 2 and reduces processing costs.
[0043] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation thereto. Any person skilled in the art may utilize the above disclosure to modify or remodel the present invention into equivalent embodiments. However, any simple modification, equivalent variation, or modification of the above embodiment that does not depart from the technical content of the present invention and is based on the technical essence of the present invention shall still fall within the scope of protection of the present invention.
Claims
1. A preheating air supply end cover of a stirring dryer, comprising an end cover shell (12), characterized in that: An air supply inlet (15) and an air supply outlet (14) are provided at the end of the end cover housing (12). The air supply outlet (14) is connected to the mixing dryer. A preheating channel is provided in the end cover housing (12). Gas enters the preheating channel through the air supply inlet (15) and is output from the air supply outlet (14).
2. The preheating air supply end cover of the stirring dryer according to claim 1 is characterized in that: The preheating channel comprises a first heat exchange chamber (18) and a second heat exchange chamber (19), wherein the first heat exchange chamber (18) and the second heat exchange chamber (19) are connected end to end, the air supply inlet (15) is located at the inlet of the first heat exchange chamber (18), and the air supply outlet (14) is located at the outlet of the second heat exchange chamber (19).
3. The preheating air supply end cover of the stirring dryer according to claim 2, characterized in that: The first heat exchange chamber (18) and the second heat exchange chamber (19) are respectively located at the top and bottom of the end cover shell (12), and a first transition chamber (21) and a second transition chamber (22) are respectively provided at both ends of the end cover shell (12). The end of the first heat exchange chamber (18) and the beginning of the second heat exchange chamber (19) are communicated through the first transition chamber (21), and the second transition chamber (22) and the air supply outlet (14) are communicated through the second transition chamber (22).
4. The preheating air supply end cover of the stirring dryer according to claim 2 is characterized in that: A feed port (11) is provided on the surface of the end cover shell (12), and the feed port (11) passes through the first heat exchange cavity (18) and the second heat exchange cavity (19).
5. The preheating air supply end cover of the stirring dryer according to claim 2, characterized in that: A preheating chamber (20) is further provided between the first heat exchange chamber (18) and the second heat exchange chamber (19), and vertical partitions (17) are respectively provided at both ends of the preheating chamber (20). The vertical partitions (17) at both ends are spaced apart from the inner wall of the end cover shell (12) to form a first transition chamber (21) and a second transition chamber (22).
6. The preheating air supply end cover of the stirring dryer according to claim 5, characterized in that: An exhaust gas outlet (13) is provided on the surface of the end cover shell (12), and the exhaust gas outlet (13) passes through the first heat exchange chamber (18) and is connected to the preheating chamber (20). An exhaust gas output port (16) is provided on the bottom surface of the end cover shell (12), and the exhaust gas output port (16) passes through the second heat exchange chamber (19) and is connected to the preheating chamber (20).
7. The preheating air supply end cover of the stirring dryer according to claim 5, characterized in that: An exhaust gas outlet (13) is provided on the surface of the end cover shell (12), and the exhaust gas outlet (13) simultaneously penetrates the first heat exchange cavity (18), the preheating cavity (20), and the second heat exchange cavity (19).