Steam dryer condensate delivery device

Abstract

The utility model discloses a kind of steam drying machine condensate water conveying devices, it is related to steam drying equipment technical field, including condensing tank body and with sedimentation tank body, condensing tank body has heat exchange cavity, the bottom of heat exchange cavity is provided with water collecting tank, the lowest point of water collecting tank relative to horizontal plane is provided with anti-blocking mechanism;Sedimentation tank body has flow guide cavity, anti-blocking mechanism is communicated with flow guide cavity, both sides of flow guide cavity are provided with separation tank, multiple separation pipes are provided in two separation tanks, multiple separation pipes are parallel to each other, and all be inclined relative to vertical plane Setting;The top of sedimentation tank body is provided with overflow tank, overflow tank is located above separation tank, overflow tank is communicated with drain pipe, drain pipe is located at the top of sedimentation tank body, condensate in heat exchange cavity flows into flow guide cavity by anti-blocking mechanism, and is conveyed to overflow tank by multiple separation pipes. Through the cooperation of anti-blocking mechanism and sedimentation tank body, solve the problem of particulate matter plugging pipeline in the condensate water conveying process of steam drying machine.

Description

Technical Field

[0001] This utility model relates to the technical field of sludge drying equipment, specifically a condensate conveying device for a steam dryer. Background Technology

[0002] Steam dryers are devices that use high-temperature steam to dry materials. Depending on the heating method, they are divided into direct heating dryers and indirect heat conduction dryers. Direct heating dryers typically use high-temperature steam to directly contact the material. After drying, the steam exhaust gas mixes with the steam generated during material drying, and the resulting condensate contains a large number of impurities, making treatment and recycling difficult. At the same time, the exhaust gas carries away a large amount of heat energy, resulting in low heat energy utilization and poor performance. Indirect heating dryers separate the high-temperature steam from the material through pipelines. The steam exhaust gas after heating and the water vapor generated during material drying are discharged separately. The steam exhaust gas can be heated and reused, while the water vapor generated during material drying needs to be cooled and dust-removed before being discharged.

[0003] When using a steam dryer to treat sludge via indirect heating, the steam generated after the sludge is dried contains a large amount of dust particles. Existing technology uses a dust collector to adsorb the dust particles in the exhaust gas generated after sludge drying. The exhaust gas after dust removal is then condensed and discharged through a condenser. However, the dust collector cannot completely adsorb the particles in the exhaust gas. After the exhaust gas enters the condenser, prolonged use leads to particle deposition, which blocks the condensate drain pipe and affects production.

[0004] Therefore, there is an urgent need to design a steam dryer condensate conveying device to solve the above problems. Summary of the Invention

[0005] In view of this, the purpose of this application is to overcome the shortcomings of the prior art and to propose a steam dryer condensate conveying device.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a steam dryer condensate conveying device, including a condenser tank and a settling tank connected to the condenser tank. The condenser tank has a heat exchange chamber, and the exhaust port of the steam dryer is connected to the heat exchange chamber. A water collection trough is provided at the bottom of the heat exchange chamber, and an anti-blocking mechanism is provided at the lowest point of the water collection trough relative to the horizontal plane. The settling tank has a guide chamber, and the anti-blocking mechanism is connected to the guide chamber. Separation boxes are provided on both sides of the guide chamber. Multiple separation pipes are provided in each of the two separation boxes. The multiple separation pipes are parallel to each other and are inclined relative to the vertical plane. An overflow trough is provided at the top of the settling tank. The overflow trough is located above the separation boxes. The overflow trough is connected to a drain pipe, which is located at the top of the settling tank. The condensate in the heat exchange chamber flows into the guide chamber through the anti-blocking mechanism and is transported to the overflow trough through the multiple separation pipes.

[0007] Preferably, the anti-clogging mechanism includes a U-shaped drain trap, a centrifugal pump, an electronic level gauge, an electronic flow meter, a first solenoid valve, and a second solenoid valve. The centrifugal pump is connected to the bottom end of the U-shaped drain trap. The first and second solenoid valves are located at the two ends of the U-shaped drain trap, respectively. The first solenoid valve is located at the water inlet end of the U-shaped drain trap. The electronic level gauge is located below the first solenoid valve, and the electronic flow meter is located above the first solenoid valve.

[0008] Preferably, the inlet end of the centrifugal pump is connected to a water tank, the outlet end of the centrifugal pump is connected to the bottom end of the U-shaped drain bend, the electronic level gauge and the electronic flow meter are both communicatively connected to the centrifugal pump, and the electronic level gauge and the electronic flow meter are both communicatively connected to the first solenoid valve and the second solenoid valve.

[0009] Preferably, when the value detected by the electronic flow meter is zero and the electronic level gauge detects that the water level at the inlet of the U-shaped drain trap is higher than the normal value, the first solenoid valve is closed, the centrifugal pump is started, and water is supplied to the U-shaped drain trap; when the value detected by the electronic flow meter is zero and the electronic level gauge detects that the water level at the inlet of the U-shaped drain trap is the normal value, the second solenoid valve is closed, the centrifugal pump is started, and water is supplied to the U-shaped drain trap.

[0010] Preferably, the heat exchange cavity is provided with multiple baffles arranged in a staggered manner parallel to the radial direction of the condenser body, and the height of each baffle is less than the diameter of the condenser body; the water collection trough passes through several baffles located on the bottom surface of the condenser body and is connected to a U-shaped drainage bend.

[0011] Preferably, the condenser tank has a condensate inlet chamber and a condensate outlet chamber at the end away from the anti-clogging mechanism. The condensate inlet chamber is located above the condensate outlet chamber and is independent of it. The other end of the condenser tank has a return chamber. The heat exchange chamber contains multiple heat exchange tubes. One end of each heat exchange tube is connected to the return chamber, and the other end of each heat exchange tube is connected to the condensate inlet chamber and the condensate outlet chamber, respectively.

[0012] Preferably, the overflow trough is an annular trough, the height of the inner wall of the overflow trough at the end away from the drain pipe is lower than the height of the outer wall, and gradually rises towards the end closer to the drain pipe until it is the same height as the outer wall. The height of the liquid inlet of the guide cavity is higher than the height of the inner wall of the overflow trough.

[0013] Preferably, the settling tank further includes a conical collecting cylinder located below the separation tank, which is used to collect and discharge particulate matter in the condensate of the steam dryer.

[0014] The beneficial effects achieved by this utility model due to the adoption of the above technical solution are as follows: This steam dryer condensate conveying device, by setting up a condensate tank and a settling tank, and utilizing an anti-clogging mechanism and multiple separation pipes, achieves effective conveying of condensate and separation of particulate matter. Specifically, the heat exchange chamber inside the condensate tank receives the exhaust gas from the steam dryer and collects condensate through a water collection tank. Under the action of the anti-clogging mechanism, the condensate avoids particulate matter clogging the pipes, ensuring smooth flow of condensate. Simultaneously, the guide chamber and separation box inside the settling tank, as well as multiple inclined separation pipes, further separate and purify the condensate, causing particulate matter to settle in the conical collection cylinder, while clean condensate is discharged through an overflow trough and drain pipe. Furthermore, the real-time monitoring and control by electronic level gauges and electronic flow meters, along with the synergistic effect of centrifugal pumps and solenoid valves, further improves the automation level and anti-clogging effect of the device. In summary, the steam dryer condensate conveying device provided by this utility model not only solves the problem of particulate matter clogging the pipes but also improves the treatment efficiency and reuse value of condensate, demonstrating good practicality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a steam dryer condensate conveying device according to the present invention;

[0016] Figure 2 for Figure 1 Schematic diagram of the structure of section AA in the middle;

[0017] Figure 3 for Figure 1 Schematic diagram of the structure of the middle BB section;

[0018] Figure 4 for Figure 1 Enlarged view of point C in the middle;

[0019] Figure 5 This is a top view of the settling tank of a steam dryer condensate conveying device according to the present invention.

[0020] Figure 6 This is a schematic diagram illustrating the movement of condensate and particulate matter within the separation pipe of a steam dryer condensate conveying device according to this utility model.

[0021] Figure 7 for Figure 5 A schematic diagram of the structure of the DD section.

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 1. Condensate tank; 11. Heat exchange chamber; 12. Water collection tank; 13. Anti-clogging mechanism; 131. U-shaped drain trap; 132. Centrifugal pump; 133. Electronic level gauge; 134. Electronic flow meter; 135a. First solenoid valve; 135b. Second solenoid valve; 14. Baffle plate; 15. Condensate inlet chamber; 16. Condensate outlet chamber; 17. Return chamber; 18. Heat exchange tube; 2. Settling tank; 21. Guide chamber; 22. Separation box; 23. Separation pipe; 24. Overflow trough; 25. Drain pipe; 26. Conical collection cylinder. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] The core of this utility model is to provide a condensate conveying device for a steam dryer, so as to solve the problem of particulate matter clogging the condensate conveying pipe during the tail gas condensation process when using a steam dryer to treat sludge.

[0026] The present invention will be described in detail with the following embodiments: Example

[0027] refer to Figure 1-7 A steam dryer condensate conveying device, such as Figure 1 As shown, the device includes a condenser tank 1 and a settling tank 2 connected to the condenser tank 1. The condenser tank 1 has a heat exchange chamber 11. The exhaust port of the steam dryer is connected to the air inlet of the heat exchange chamber 11. A water collection trough 12 is provided at the bottom of the heat exchange chamber 11 along the axial direction of the condenser tank 1. Figure 2 As shown, the water collection tank 12 has a V-shaped structure. The lowest point of the water collection tank 12 relative to the horizontal plane is provided with an anti-clogging mechanism 13. When the condensate tank 1 is set, it forms an angle of 5°-10° with the horizontal plane to facilitate the collection and discharge of condensate.

[0028] The settling tank 2 has a flow guiding cavity 21, and the anti-blocking mechanism 13 is connected to the flow guiding cavity 21. Separation boxes 22 are provided on both sides of the flow guiding cavity 21. Multiple separation pipes 23 are provided in each of the two separation boxes 22. The multiple separation pipes 23 are parallel to each other and are inclined relative to the vertical plane.

[0029] An overflow trough 24 is provided at the top of the settling tank 2. The overflow trough 24 is located above the separation box 22. The overflow trough 24 is connected to a drain pipe 25. The drain pipe 25 is located at the top of the settling tank 2. The condensate in the heat exchange chamber 11 flows into the guide chamber 21 through the anti-blocking mechanism 13 and is transported to the overflow trough 24 through multiple separation pipes 23.

[0030] In actual use, the exhaust gas from the steam dryer, after being dedusted by a dust collector, is then drawn off by an induced draft fan. Figure 1 The second air inlet on the upper left sends air into the heat exchange chamber 11. After heat exchange in the heat exchange chamber, the water vapor in the exhaust gas of the material condenses into water droplets and carries dust particles to the bottom of the heat exchange chamber 11. After being collected by the water collection tank 12, the gas is discharged into the settling tank 2 through the anti-blocking mechanism 13. The remaining gas is discharged through the exhaust port on the upper right of the heat exchange chamber 11.

[0031] In the above structure, because the condensate contains dust particles, these particles settle and accumulate, filling the water collection tank 12 and subsequently blocking the drain outlet in the heat exchange chamber 11. Therefore, an anti-blocking mechanism 13 is provided, such as... Figure 4 As shown, the anti-clogging mechanism 13 includes a U-shaped drain trap 131, a centrifugal pump 132, an electronic level gauge 133, an electronic flow meter 134, a first solenoid valve 135a, and a second solenoid valve 135b. The centrifugal pump 132 is connected to the bottom end of the U-shaped drain trap 131. The first solenoid valve 135a and the second solenoid valve 135b are located at the two ends of the U-shaped drain trap 131, respectively. The first solenoid valve 135a is located at the water inlet end of the U-shaped drain trap 131. The electronic level gauge 133 is located below the first solenoid valve 135a, and the electronic flow meter 134 is located above the first solenoid valve 135a. Both the electronic level gauge 133 and the electronic flow meter 134 are communicatively connected to the centrifugal pump 132. Both the electronic level gauge 133 and the electronic flow meter 134 are communicatively connected to the first solenoid valve 135a and the second solenoid valve 135b.

[0032] Since the heat exchange chamber 11 is under negative pressure after the steam cools down and condenses, a U-shaped drain bend 131 is provided to ensure the smooth discharge of condensate, which acts as a water seal. Preferably, the height of the water seal needs to meet the following conditions: water seal height > maximum negative pressure (maximum negative pressure allowed by heat exchange chamber 11) / water density * gravitational acceleration + safety margin.

[0033] In actual use, due to its structure, the lowest point of the U-shaped drainage bend 131 will inevitably accumulate dust particles. To solve this problem, such as... Figure 4 As shown, a centrifugal pump 132 is installed on one side of the U-shaped drain bend 131. The inlet end of the centrifugal pump 132 is connected to a water tank, and the outlet end of the centrifugal pump 132 is connected to the bottom end of the U-shaped drain bend 131.

[0034] During normal use, both the first solenoid valve 135a and the second solenoid valve 135b are open. Specifically, when the electronic flow meter 134 detects a value of zero and the electronic level gauge 133 detects a water level at the inlet of the U-shaped drain trap 131 higher than the normal value (i.e., water seal height), it is determined that the U-shaped drain trap 131 is blocked. In this case, the first solenoid valve 135a is closed, the second solenoid valve 135b is opened, the centrifugal pump 132 is started, and water is supplied to the U-shaped drain trap 131 to flush out the blockage dust particles inside. When the water level is at the normal value, it is determined that there is a blockage in the pipeline between the heat exchange chamber 11 and the first solenoid valve 135a. Then, the second solenoid valve 135b is closed, the first solenoid valve 135a is opened to start the centrifugal pump 132 and deliver water to the U-shaped drain trap 131. The water flows upward against the current to flush the heat exchange chamber 11 and the water collection tank 12. During this period, this operation is performed intermittently with a half-minute cycle. After three cycles, the first solenoid valve 135a and the second solenoid valve 135b are opened at the same time. If the value of the electronic flow meter 134 returns to the normal flow rate and the water level of the U-shaped drain trap 131 is normal, it means that the blockage is cleared and the dust particles that caused the blockage enter the settling tank 2 with the water flow.

[0035] like Figure 1 , 3 As shown in Figures 5, 6, and 7, the condensate discharged through the anti-blocking mechanism 13 enters the guide cavity 21 of the settling tank 2. Due to the structural limitation of the guide cavity 21, the condensate collects at the bottom of the settling tank 2. The dust particles in the condensate undergo initial sedimentation under the action of gravity. As the water level rises, it enters multiple separation pipes 23. Due to the inclined structure of the separation pipes 23, the water flows upward, while the dust particles move downward under the action of gravity, undergoing secondary sedimentation and finally collecting at the bottom of the settling tank 2. After the condensate passes through the separation pipes 23, the water level continues to rise. Because the overflow trough 24 is an annular trough, the height of the inner wall of the overflow trough 24 at the end away from the drain pipe 25 is lower than the height of the outer wall, and gradually rises towards the end closer to the drain pipe 25 until it is the same height as the outer wall. The height of the liquid inlet of the guide cavity 21 is higher than the highest height of the inner wall of the overflow trough 24. Condensate enters the overflow trough 24 from the lowest point of the inner wall and is discharged through the drain pipe 25. It should be noted that the lowest point of the drain pipe 25 and the lowest point of the overflow trough 24 are at the same level, which facilitates the discharge of condensate.

[0036] like Figure 1 As shown, in order to improve condensation efficiency, multiple baffles 14 are arranged alternately in the heat exchange chamber 11, which are radially parallel to the condenser tank 1. The height of each baffle 14 is smaller than the diameter of the condenser tank 1. The water collection tank 12 passes through several baffles 14 located on the bottom surface of the condenser tank 1 and is connected to the U-shaped drain bend 131.

[0037] Specifically, the condenser tank 1 has a condensate inlet chamber 15 and a condensate outlet chamber 16 at the end away from the anti-blocking mechanism 13. The condensate inlet chamber 15 is located above the condensate outlet chamber 16 and is independent of it. The other end of the condenser tank 1 has a return chamber 17. The heat exchange chamber 11 has multiple heat exchange tubes 18. One end of each heat exchange tube 18 is connected to the return chamber 17, and the other end of each heat exchange tube 18 is connected to the condensate inlet chamber 15 of the condensate inlet section and the condensate outlet chamber 16 of the condensate outlet section.

[0038] Preferably, the settling tank 2 further includes a conical collecting cylinder 26, which is located below the separation box 22 and is used to collect and discharge particulate matter in the condensate of the steam dryer.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A condensate conveying device for a steam dryer, characterized in that, It includes a condenser tank (1) and a settling tank (2) connected to the condenser tank (1). The condenser tank (1) has a heat exchange chamber (11). The exhaust port of the steam dryer is connected to the heat exchange chamber (11). A water collection tank (12) is provided at the bottom of the heat exchange chamber (11). An anti-blocking mechanism (13) is provided at the lowest point of the water collection tank (12) relative to the horizontal plane. The settling tank (2) has a flow guide cavity (21), and the anti-blocking mechanism (13) is connected to the flow guide cavity (21). Separation boxes (22) are provided on both sides of the flow guide cavity (21). Multiple separation pipes (23) are provided in both separation boxes (22). The multiple separation pipes (23) are parallel to each other and are inclined relative to the vertical plane. The settling tank (2) is provided with an overflow trough (24) at the top. The overflow trough (24) is located above the separation box (22). The overflow trough (24) is connected to a drain pipe (25). The drain pipe (25) is located at the top of the settling tank (2). The condensate in the heat exchange chamber (11) flows into the guide chamber (21) through the anti-blocking mechanism (13) and is transported to the overflow trough (24) through multiple separation pipes (23).

2. The steam dryer condensate conveying device according to claim 1, characterized in that, The anti-clogging mechanism (13) includes a U-shaped drain trap (131), a centrifugal pump (132), an electronic level gauge (133), an electronic flow meter (134), a first solenoid valve (135a), and a second solenoid valve (135b). The centrifugal pump (132) is connected to the bottom end of the U-shaped drain trap (131). The first solenoid valve (135a) and the second solenoid valve (135b) are located at the two ends of the U-shaped drain trap (131), respectively. The first solenoid valve (135a) is located at the water inlet end of the U-shaped drain trap (131). The electronic level gauge (133) is located below the first solenoid valve (135a), and the electronic flow meter (134) is located above the first solenoid valve (135a).

3. The steam dryer condensate conveying device according to claim 2, characterized in that, The centrifugal pump (132) has a water tank connected to its inlet end, and its outlet end is connected to the bottom end of a U-shaped drain bend (131). The electronic level gauge (133) and the electronic flow meter (134) are both connected to the centrifugal pump (132) in communication. The electronic level gauge (133) and the electronic flow meter (134) are both connected to the first solenoid valve (135a) and the second solenoid valve (135b) in communication.

4. The steam dryer condensate conveying device according to claim 3, characterized in that, When the value detected by the electronic flow meter (134) is zero, and the electronic level gauge (133) detects that the water level at the inlet of the U-shaped drain trap (131) is higher than the normal value, the first solenoid valve (135a) is closed, the centrifugal pump (132) is started, and water is supplied to the U-shaped drain trap (131); when the value detected by the electronic flow meter (134) is zero, and the electronic level gauge (133) detects that the water level at the inlet of the U-shaped drain trap (131) is the normal value, the second solenoid valve (135b) is closed, the centrifugal pump (132) is started, and water is supplied to the U-shaped drain trap (131).

5. The steam dryer condensate conveying device according to any one of claims 2-4, characterized in that, The heat exchange chamber (11) is provided with multiple baffles (14) arranged in a staggered manner parallel to the radial direction of the condenser (1), and the height of each baffle (14) is less than the diameter of the condenser (1); the water collection tank (12) passes through several baffles (14) located on the bottom surface of the condenser (1) and is connected to the U-shaped drainage bend (131).

6. The steam dryer condensate conveying device according to claim 5, characterized in that, The condenser tank (1) has a condensate inlet chamber (15) and a condensate outlet chamber (16) at one end away from the anti-blocking mechanism (13). The condensate inlet chamber (15) is located above the condensate outlet chamber (16) and is independent of the condensate outlet chamber (16). The other end of the condenser tank (1) has a return chamber (17). The heat exchange chamber (11) has multiple heat exchange tubes (18). One end of each heat exchange tube (18) is connected to the return chamber (17), and the other end of each heat exchange tube (18) is connected to the condensate inlet chamber (15) and the condensate outlet chamber (16) respectively.

7. The steam dryer condensate conveying device according to claim 1, characterized in that, The overflow trough (24) is an annular trough. The height of the inner wall of the overflow trough (24) at the end away from the drain pipe (25) is lower than the height of the outer wall, and gradually rises towards the end closer to the drain pipe (25) to the same height as the outer wall. The height of the inlet of the guide cavity (21) is higher than the height of the inner wall of the overflow trough (24).

8. The steam dryer condensate conveying device according to claim 1, characterized in that, The settling tank (2) also includes a conical collecting cylinder (26), which is located below the separation box (22) and is used to collect particulate matter in the condensate of the steam dryer and discharge it.

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