Sludge drying system
By introducing a pressure tank and valve-controlled vapor-liquid separation design into the sludge drying system, the problems of steam leakage and energy loss were solved, resulting in a more efficient sludge drying process.
Patent Information
- Application Number
- CN202520029715.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-06
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2035-01-06
AI Technical Summary
Existing sludge drying systems suffer from steam leakage and energy loss during gas-liquid separation, leading to a decrease in heat exchange efficiency.
A sludge drying system is adopted, including a sludge drying mechanism and a pressure tank. Valves are set to control the flow of the vapor-liquid mixture to achieve vapor-liquid separation. The liquid seal mechanism in the pressure tank is used to prevent steam from entering the pressure tank, thereby reducing energy waste.
This effectively prevents steam leakage, improves the system's energy utilization efficiency, reduces energy loss, and increases the efficiency of the sludge drying process.
Smart Images
Figure CN223813435U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to sludge drying technical field especially is a kind of sludge drying system. BACKGROUND
[0002] The moisture content of sludge after mechanical dewatering is still above 78%, and sludge thermal drying can further remove water from dewatered sludge through heat transfer between sludge and heat medium to reduce the volume of sludge. The odor, pathogens, viscosity, instability and other properties of dried sludge are significantly improved, which can be used as fertilizer, soil conditioner, building material, landfill, alternative energy or further refined into chemical products after being converted into oil and gas.
[0003] The existing sludge drying system separates gas and liquid through a drain valve, but the drain valve can cause some steam leakage when separating gas and liquid, which affects the steam pressure inside the drying machine, resulting in certain energy loss and reduction of heat exchange efficiency.
[0004] Therefore, the above technical problems need to be further solved. UTILITY MODEL CONTENT
[0005] The utility model aims to provide a sludge drying system to alleviate the technical problems in the above related technologies.
[0006] The utility model provides a sludge drying system, comprising:
[0007] A sludge drying mechanism has a first air inlet and a feed inlet. The first air inlet is connected to a steam source. The feed inlet is used to supply sludge to be dried to the sludge drying mechanism. The sludge drying mechanism has a first exhaust port and a discharge port. The discharge port is used to discharge the dried sludge to be dried outside the sludge drying mechanism.
[0008] A pressure tank has a first port with a first opening. The first opening is connected to and communicates with the first air inlet. The second end of the pressure tank has a second opening. The second opening is used to connect and communicate with the first exhaust port. The third end of the pressure tank has a third opening. The third opening is used to discharge the liquid in the pressure tank to the outside of the pressure tank.
[0009] Wherein, the first opening is opposite to the third opening, and the second opening is located between the first opening and the third opening. Valves are arranged between the first opening and the first air inlet, between the second opening and the first exhaust port, and on the third opening.
[0010] The purpose of the present application and the technical problems can also be solved by the following technical measures.
[0011] Optionally, the sludge drying system as claimed in the preceding claim, wherein the second opening is located in the middle between the first opening and the third opening.
[0012] Optionally, the sludge drying system as claimed in the preceding claim, wherein the sludge drying mechanism is provided with a second air outlet and a second air inlet.
[0013] The second air inlet is configured to introduce air into the sludge drying mechanism, so that the air carries away the exhaust gas generated by the sludge during the drying process and is discharged to the outside of the sludge drying mechanism through the second air outlet.
[0014] Optionally, the sludge drying system as claimed in the preceding claim, further comprising:
[0015] a drying exhaust gas treatment mechanism connected to and in communication with the second air outlet, the drying exhaust gas treatment mechanism being configured to remove the exhaust gas.
[0016] Optionally, the sludge drying system as claimed in the preceding claim, wherein the drying exhaust gas treatment mechanism comprises:
[0017] a cyclone dust removal tower, a condenser and an exhaust gas fan connected in sequence.
[0018] The end of the cyclone dust removal tower away from the condenser is connected to the second air outlet.
[0019] Optionally, the sludge drying system as claimed in the preceding claim, further comprising:
[0020] a conveying mechanism located below the discharge port.
[0021] The conveying mechanism is configured to convey the dried sludge and collect it.
[0022] Optionally, the sludge drying system as claimed in the preceding claim, wherein the conveying mechanism is a scraper conveyor.
[0023] By means of the above technical solution, the sludge drying system of the present application has at least the following advantages:
[0024] The sludge drying system provided in this application embodiment, when the sludge drying mechanism is working, steam exchanges heat and is converted into condensate in the sludge drying mechanism. The vapor-liquid mixture is discharged from the sludge drying mechanism into the pressure tank. Due to gravity, the vapor-liquid mixture achieves vapor-liquid separation in the pressure tank. After running for a period of time, the liquid level in the pressure tank will be higher than the second port, thereby achieving a liquid seal on the sludge drying mechanism and the steam source. At this time, only when the steam in the sludge drying mechanism is completely converted into condensate can it enter the pressure tank under the action of gravity. Due to the existence of the liquid seal, the problem of energy waste caused by steam in the inner cylinder entering the pressure tank is effectively avoided. Attached Figure Description
[0025] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this utility model, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0026] Figure 1 A schematic diagram of the structure of the photovoltaic carrier moving device provided in the embodiment of this utility model.
[0027] icon:
[0028] 1. Sludge drying mechanism; 101. Rotating shaft; 102. First opening; 103. Second opening; 104. Through hole; 105. Connecting port;
[0029] 3. Feed inlet; 5. Discharge outlet; 6. Pressure tank; 7. First port; 8. Second port; 9. Third port; 10. Second exhaust port; 11. Second air inlet; 12. Drying tail gas treatment mechanism; 13. Conveying mechanism. Detailed Implementation
[0030] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0031] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0033] Example
[0034] like Figure 1 As shown, the sludge drying system proposed in the embodiments of this utility model includes:
[0035] The sludge drying mechanism 1 has a first air inlet and a feed inlet 3. The first air inlet is used to connect to a steam source, and the feed inlet 3 is used to supply sludge to be dried to the sludge drying mechanism 1. The sludge drying mechanism 1 has a first exhaust outlet and a discharge outlet 5. The discharge outlet 5 is used to discharge the dried sludge to be dried to the outside of the sludge drying mechanism 1.
[0036] The pressure tank 6 has a first port 7 at its first end, which is connected to and communicates with the first air inlet. The pressure tank 6 has a second port 8 at its second end, which is connected to and communicates with the first exhaust port. The pressure tank 6 has a third port 9 at its third end, which is used to discharge the liquid inside the pressure tank 6 to the outside of the pressure tank 6.
[0037] The first port 7 is opposite to the third port 9, and the second port 8 is located between the first port 7 and the third port 9. Valves are provided between the first port 7 and the first air inlet, between the second port 8 and the first exhaust port, and on the third port 9.
[0038] Specifically, the sludge drying mechanism 1 is used to convert wet sludge into semi-dry sludge with lower water content. After drying, the odor, pathogen, viscosity, instability, and the like of the sludge are significantly improved, and the sludge can be used as fertilizer, soil conditioner, building material, landfill, alternative energy, or further refined into chemical products after being converted into oil and gas. In addition, the water generated during the drying of the sludge can also be recycled and utilized.
[0039] The present application provides an embodiment of a sludge drying mechanism 1, which comprises an inner cylinder and an outer cylinder, the inner cylinder and the outer cylinder are hollow inside, and the inner cylinder is sleeved in the outer cylinder, the inner cylinder and the outer cylinder are coaxial, there is a gap between the inner cylinder and the outer cylinder, a rotating shaft 101 is arranged in the inner cylinder, the rotating shaft 101 extends in a first direction, so that the first end of the rotating shaft 101 penetrates the outside of the outer cylinder, the second end of the rotating shaft 101 away from the first end penetrates the outside of the outer cylinder, the first end of the rotating shaft 101 has a first opening 102, the second end of the rotating shaft 101 has a second opening 103, the first opening 102 is connected with the second opening 103 and forms a channel, the first direction is the axial direction of the inner cylinder, the rotating shaft 101 is rotatably connected with the inner cylinder and the outer cylinder through bearings, a plurality of discs are arranged on the rotating shaft 101, the plurality of discs are located in the inner cylinder and are arranged at intervals in the first direction, the interval distance between adjacent discs is the same, the first opening 102 is connected with and communicates with a steam source and a first port 7, the inside of each disc is hollow and communicates with the channel of the corresponding part of the rotating shaft 101, the rotating shaft 101 is drivingly connected with a motor, so that the motor can drive the rotating shaft 101 to rotate in the inner cylinder, a discharge port 5 is arranged in the inner cylinder, one end of the discharge port 5 penetrates the inner cylinder and the outer cylinder in sequence and extends to the outside of the outer cylinder, a feeding port 3 is arranged in the inner cylinder, one end of the feeding port 3 penetrates the inner cylinder and the outer cylinder in sequence and extends to the outside of the outer cylinder, the feeding port 3 is opposite to the discharge port 5, one end of the feeding port 3 is located above one end of the discharge port 5, the second opening 103 is connected with and communicates with a second port 8, at least one through hole 104 is arranged on the outer cylinder, the through hole 104 communicates with the interlayer between the inner cylinder and the outer cylinder, at least one communication port 105 is arranged on the outer cylinder, the communication port 105 communicates with the interlayer between the inner cylinder and the outer cylinder, the through hole 104 is located above the communication port 105, the through hole 104 is connected with and communicates with the steam source and the first port 7, and the communication port 105 is connected with and communicates with the second port 8.
[0040] The first opening 102 is used to introduce steam into the channel, the steam enters the rotating shaft 101 and the discs to bake the wet sludge located in the inner cylinder, and the second opening 103 is used to discharge the gas-liquid mixture in the channel.
[0041] The through hole 104 is used to introduce steam into the interlayer and bake the wet sludge located in the inner cylinder, and the communication port 105 is used to discharge the gas-liquid mixture in the interlayer.
[0042] The rotating shaft 101 and the disc are used for extruding and stirring the wet sludge in the inner cylinder.
[0043] The working principle of the sludge drying mechanism 1 is that the sludge enters the inner cylinder through the feeding port 3, is subjected to high-temperature baking in the interlayer and the channel, and the water in the sludge gradually evaporates. Meanwhile, in the rotation process of the rotating shaft 101 driving the disc, the sludge is continuously subjected to friction and extrusion, and finally becomes semi-dry sludge with a low water content, and is discharged from the discharge port 5 to the outside.
[0044] The steam source is connected and communicated with the first through port 7, the first opening 102 and the through hole 104, and the first opening 102 and the through hole 104 are connected and communicated with the first through port 7. This structure design can facilitate the balance between the gas pressure in the inner cylinder and the interlayer between the inner cylinder and the outer cylinder, so that the gas-liquid mixture in the inner cylinder can be transported to the second through port 8 through the second opening 103 and the communication port 105 and smoothly enter the pressure tank 6.
[0045] The through hole 104 and the first opening 102 jointly form a first air inlet, and the communication port 105 and the second opening 103 jointly form a first air outlet.
[0046] Valves are arranged between the second through port 8 and the second opening 103 and on the third through port 9. The arrangement of the valves can facilitate the control of the on-off of the pipelines.
[0047] The first through port 7 is opposite to the third through port 9, and the second through port 8 is located between the first through port 7 and the third through port 9. This structure design can play a liquid sealing effect, effectively avoiding the steam in the inner cylinder entering the pressure tank 6, thereby causing energy waste.
[0048] When the sludge drying mechanism 1 is working, the steam in the sludge drying mechanism 1 exchanges heat and is converted into condensed water, and the gas-liquid mixture is discharged from the sludge drying mechanism 1 to the pressure tank 6. Due to the action of gravity, the gas-liquid mixture realizes gas-liquid separation in the pressure tank 6. After running for a period of time, the liquid level in the pressure tank 6 will be higher than the second through port 8, thereby realizing liquid sealing of the sludge drying mechanism 1 and the steam source. At this time, only when the steam in the sludge drying mechanism 1 is completely converted into condensed water, can it enter the pressure tank 6 under the action of gravity. Due to the existence of liquid sealing, the problem of energy waste caused by the steam in the inner cylinder entering the pressure tank 6 is effectively avoided.
[0049] The third through port 9 can discharge the condensed water in the pressure tank 6 under pressure and recycle. In addition, the existing sludge drying system has a short steam leakage state during work. The application can effectively solve the problem of steam leakage through the arrangement of the pressure tank 6.
[0050] Finally, in the existing sludge drying system, after the pressure of the drain valve drops a lot, in order to ensure the delivery of steam condensate, a drain cooler needs to be set to preliminarily cool the steam condensate, and then it is delivered outside, which increases the equipment and investment cost. In the present application, since the pressure tank 6 is set, the technical personnel can directly deliver the condensate in the pressure tank 6 under pressure through the third port 9 of the pressure tank 6, so as to solve the technical problems existing in the above-mentioned technology.
[0051] As shown in Figure 1 In specific implementation, the second port 8 is located in the middle between the first port 7 and the third port 9.
[0052] Specifically, this structure design can better realize the effect of liquid seal.
[0053] As shown in Figure 1 In specific implementation, the sludge drying mechanism 1 is provided with a second exhaust port 10 and a second air inlet 11.
[0054] The second air inlet 11 is used to introduce air into the sludge drying mechanism 1, so that the air carries away the tail gas generated by the sludge to be dried in the drying process, and the tail gas is discharged to the outside of the sludge drying mechanism 1 through the second exhaust port 10.
[0055] Specifically, the second air inlet 11 is used to introduce air into the sludge drying mechanism 1, so that the air carries away the water generated by the sludge to be dried in the drying process, thereby improving the drying effect of the sludge drying mechanism 1 on the sludge to be dried.
[0056] The second exhaust port 10 is used to discharge the air in the inner cylinder, which carries away the tail gas generated by the sludge to be dried in the drying process. The tail gas contains dust, water vapor generated by sludge drying, and non-condensable gas (gas that does not condense into liquid, such as air introduced into the inner cylinder).
[0057] As shown in Figure 1 In specific implementation, it further includes:
[0058] The drying tail gas treatment mechanism 12 is connected and communicated with the second exhaust port 10, and the drying tail gas treatment mechanism 12 is used to remove the tail gas.
[0059] The drying tail gas treatment mechanism 12 includes:
[0060] a cyclone dust removal tower, a condenser and a tail gas fan connected in sequence.
[0061] The end of the cyclone dust removal tower away from the condenser is connected with the second exhaust port 10.
[0062] Specifically, the application provides an embodiment of a dried tail gas treatment mechanism 12, that is, the dried tail gas treatment mechanism 12 comprises a cyclone dust removal tower, a condenser and a tail gas fan connected in sequence, one end of the cyclone dust removal tower away from the condenser is connected with the second exhaust port 10, the cyclone dust removal tower is used for removing dust contained in the tail gas, the condenser can cool water vapor generated in the drying process of the impurity-removed wet sludge, and the water vapor is changed into liquid to be deposited at the bottom of the condenser for centralized collection. The tail gas fan can provide power, under the action of the tail gas fan, air enters the inner cylinder from the second exhaust port 10, and is discharged from the inner cylinder, and then sequentially passes through the cyclone dust removal tower and the condenser, so as to achieve the effect of removing the tail gas.
[0063] As shown in the specific implementation, the application further comprises: Figure 1
[0064] A conveying mechanism 13 located below the discharge port 5;
[0065] The conveying mechanism 13 is used for conveying the dried sludge to be dried and collecting.
[0066] Specifically, the conveying mechanism 13 is used for conveying the dried semi-dry sludge with low water content and collecting, so as to reuse the dried semi-dry sludge with low water content, and the odor, pathogen, viscosity and instability of the dried sludge are significantly improved, and the dried sludge can be used as fertilizer, soil conditioner, building material, landfill, alternative energy or be further refined into chemical products after being converted into oil and gas.
[0067] The application provides an embodiment of a conveying mechanism 13, that is, the conveying mechanism 13 is a scraper conveyor, which mainly comprises a head part, a middle part and a tail part, the head part comprises a head frame, a motor, a hydraulic coupling, a speed reducer and a chain wheel and the like, the motor is connected with the speed reducer through the hydraulic coupling or an elastic coupling, the speed reducer drives the chain wheel to rotate, thereby driving the scraper chain to move; the middle part comprises a transition groove, a middle groove, a chain and a scraper and the like, the middle groove is a main channel for material conveying, the scraper is fixed on the chain, and the material is brought forward through the continuous movement of the chain; the tail part is a device for returning the scraper chain, and is usually provided with a hydraulic jack, a chain tensioner and the like, and the tail part is also provided with a chain pressing block to ensure the stable operation of the scraper chain.
[0068] The working principle of the scraper conveyor is to use the continuous movement of the scraper chain to convey the material from the feeding port of the scraper conveyor to the discharging port of the scraper conveyor, when the scraper chain moves in the middle groove, the material is driven by the scraper chain and moves forward along the middle groove, and finally reaches the discharging port of the scraper conveyor.
[0069] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, but not limited to them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A sludge drying system, characterized in that, include: A sludge drying mechanism has a first air inlet and a feed inlet. The first air inlet is used to connect to a steam source, and the feed inlet is used to supply sludge to be dried to the sludge drying mechanism. The sludge drying mechanism also has a first exhaust outlet and a discharge outlet, and the discharge outlet is used to discharge the dried sludge to be dried outside the sludge drying mechanism. A pressure tank, wherein a first end of the pressure tank has a first port, the first port being connected and communicating with a first air inlet; a second end of the pressure tank has a second port, the second port being connected and communicating with a first exhaust port; and a third end of the pressure tank has a third port, the third port being used to discharge liquid inside the pressure tank to the outside of the pressure tank. The first port is opposite to the third port, and the second port is located between the first port and the third port. Valves are provided between the first port and the first air inlet, between the second port and the first exhaust port, and on the third port.
2. The sludge drying system according to claim 1, characterized in that, The second port is located in the middle between the first port and the third port.
3. The sludge drying system according to claim 1, characterized in that, The sludge drying mechanism is equipped with a second exhaust port and a second air inlet. The second air inlet is used to introduce air into the sludge drying mechanism so that the air carries away the exhaust gas generated by the sludge to be dried during the drying process and is discharged to the outside of the sludge drying mechanism through the second exhaust port.
4. The sludge drying system according to claim 3, characterized in that, Also includes: A tail gas drying treatment mechanism is connected and communicated with the second exhaust port, and the tail gas drying treatment mechanism is used to remove the tail gas.
5. The sludge drying system according to claim 4, characterized in that, The drying exhaust gas treatment mechanism includes: The cyclone dust collector, condenser, and exhaust fan are connected in sequence. The end of the cyclone dust collector away from the condenser is connected to the second exhaust port.
6. The sludge drying system according to claim 1, characterized in that, Also includes: A conveying mechanism, located below the discharge port; The conveying mechanism is used to transport the dried sludge and collect it centrally.
7. The sludge drying system according to claim 6, characterized in that, The conveying mechanism is a scraper conveyor.