A sludge treatment system

Abstract

A sludge treatment system includes: a sludge pump configured to pump sludge; a valve device including: an inlet connected to the sludge pump, from which sludge flows into the valve device; multiple outlets from which sludge flows out of the valve device; a receiving cavity disposed at the connection between the inlet and the multiple outlets; a valve core located in the receiving cavity, the valve core being rotatable to control the amount of sludge flowing out from the multiple outlets; and an incinerator configured to incinerate the sludge, the incinerator including multiple sludge induction points, each sludge induction point being connected to a corresponding outlet of the valve device; wherein the valve device further includes an actuator configured to actuate the valve core such that the amount of sludge flowing out from each outlet is substantially the same.

Description

Technical Field

[0001] This utility model relates to a sludge treatment system, and more specifically, to a sludge treatment system including an incinerator. Background Technology

[0002] Incinerating sludge in an incinerator is a common sludge treatment method in recent years. Sludge is transported to multiple sludge feeding points on the incinerator via distribution valves, and then fed into the incinerator from these points. However, in existing technologies, because sludge is a non-Newtonian fluid, uneven sludge distribution is prone to occur. For example, the amount of sludge fed into one feeding point may be much higher than that fed into another. When the amount of sludge fed into the multiple feeding points of the incinerator is uneven, it leads to uneven combustion within the incinerator, causing fluctuations in furnace temperature and consequently affecting the incinerator's operating conditions.

[0003] Therefore, it is desirable to propose a sludge treatment system that improves upon the shortcomings of the existing technology. Utility Model Content

[0004] According to one aspect of this utility model, a sludge treatment system is proposed, comprising: a sludge pump configured to pump sludge; a valve device comprising: an inlet connected to the sludge pump, through which sludge flows into the valve device; multiple outlets through which sludge flows out of the valve device; a receiving cavity disposed at the connection between the inlet and the multiple outlets; a valve core located in the receiving cavity, the valve core being rotatable to control the amount of sludge flowing out from the multiple outlets; and an incinerator configured to incinerate the sludge, the incinerator comprising multiple symmetrically arranged sludge feeding points, each sludge feeding point being connected to a corresponding outlet of the valve device; wherein the valve device further comprises an actuator configured to actuate the valve core, such that the amount of sludge flowing out from each outlet is substantially the same.

[0005] According to this scheme, because the actuator actuates the valve core, the amount of sludge flowing out from each outlet is basically the same, resulting in a similar amount of sludge being added to the incinerator from each sludge addition point. When the amount of sludge added to the multiple symmetrically arranged sludge addition points in the incinerator is uniform, it will lead to uniform combustion in the incinerator, thus preventing furnace temperature fluctuations and improving the incinerator's operating conditions.

[0006] In some designs, the valve device may include one inlet and two outlets, namely a first outlet and a second outlet.

[0007] In some designs, the valve core can rotate between a first position and a second position. When the valve core is in the first position, the channel opening between the inlet and the first outlet is at its maximum, and the inlet and the second outlet are not connected. When the valve core is in the second position, the channel opening between the inlet and the second outlet is at its maximum, and the inlet and the first outlet are not connected. When the valve core rotates from the first position toward the second position, the channel opening between the inlet and the first outlet gradually decreases, and the channel opening between the inlet and the second outlet gradually increases.

[0008] According to this scheme, when a large amount of sludge flows out from the first outlet, the valve core can be actuated towards the second position via the actuation valve. This reduces the channel opening between the inlet and the first outlet while increasing the channel opening between the inlet and the second outlet, thereby reducing the amount of sludge flowing out from the first outlet and increasing the amount flowing out from the second outlet, achieving uniform sludge distribution. Furthermore, during the rotation of the valve core, it ensures that the inlet is connected to one of the two outlets; in other words, there is no situation where the inlet is not connected to either outlet. This avoids pressure buildup in the upstream sludge pump due to a lack of connection between the inlet and both outlets, preventing damage to the sludge pump under excessive pressure.

[0009] In some solutions, a temperature sensor can be installed at the sludge addition point, and the actuator actuates the valve core based on the temperature sensed by the temperature sensor.

[0010] According to this scheme, since the more sludge added, the more heat is released from sludge combustion, the temperature sensed by the temperature sensor can indicate the amount of sludge added at the sludge addition point. For example, when the temperature sensor reading at the sludge addition point corresponding to the first outlet is high, it indicates that a large amount of sludge is flowing out of the first outlet. In this case, the valve core can be adjusted to reduce the amount of sludge flowing out of the first outlet.

[0011] In some designs, the actuator can be configured to actuate the valve spool to a first position when the first outlet is blocked, and to actuate the valve spool to a second position when the second outlet is blocked.

[0012] According to this scheme, when the first outlet is blocked, actuating the valve core to the first position allows all the pressure output by the sludge pump to be applied to the first outlet, which helps to clear the blockage. Similarly, when the second outlet is blocked, actuating the valve core to the second position allows all the pressure output by the sludge pump to be applied to the second outlet, which helps to clear the blockage.

[0013] In some designs, the receiving cavity can be cylindrical, with the valve core extending between the circumferential inner walls of the receiving cavity and passing through the central axis of the receiving cavity, and the valve core rotating about the central axis of the receiving cavity.

[0014] In some designs, the valve core can be wedge-shaped, gradually narrowing from the central axis of the receiving cavity to the circumferential inner wall of the receiving cavity.

[0015] According to this design, the wedge-shaped valve core is particularly suitable for conveying viscous sludge. In particular, compared to a spherical valve core, viscous sludge is less likely to adhere to the wedge-shaped valve core, making the valve device less prone to clogging.

[0016] In some designs, the incinerator can be a bubbling fluidized bed, with the valve core periodically switching to a first or second position.

[0017] According to this scheme, the valve core can switch positions at fixed intervals. For example, it may be in position one in the first minute, position two in the second minute, position one in the third minute, position two in the fourth minute, and so on. This can achieve the effect of pulsed combustion to promote fluidization in the fluidized bed.

[0018] In some designs, the extension directions of the two outlets can be perpendicular to each other, and the extension direction of the inlet can be at a 135° angle to the extension directions of both outlets.

[0019] In some designs, the actuator can be a pneumatic actuator configured to actuate the valve spool via gas pressure. Attached Figure Description

[0020] Figure 1 A schematic diagram of a sludge treatment system according to an embodiment of the present invention is shown;

[0021] Figure 2 A schematic diagram of a valve device according to an embodiment of the present invention is shown, wherein the valve core is in a first position;

[0022] Figure 3 A schematic diagram of a valve device according to an embodiment of the present invention is shown, wherein the valve core is in a second position;

[0023] Figure 4 A perspective view of a valve device according to an embodiment of the present invention is shown.

[0024] Figure Labels

[0025] 10. Sludge Treatment System

[0026] 100 Valve Device

[0027] 110 Entrance

[0028] 112 Connecting part

[0029] 122 First Exit

[0030] 124 Second Exit

[0031] 130 valve core

[0032] 140 actuator

[0033] 150 valve stem

[0034] 200 sludge pump

[0035] 300 incinerator

[0036] 310 First sludge addition point

[0037] 312 First Temperature Sensor

[0038] 320 Second sludge addition point

[0039] 322 Second Temperature Sensor

[0040] C Receiving cavity Detailed Implementation

[0041] To make the objectives, solutions, and advantages of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Unless otherwise stated, the terms used herein have their ordinary meanings in the art. The same reference numerals in the drawings represent the same parts.

[0042] Figure 1 A schematic diagram of a sludge treatment system 10 according to an embodiment of the present invention is shown. The sludge treatment system 10 mainly includes a sludge pump 200, a valve device 100, and an incinerator 300. The sludge pump 200 pumps sludge to the valve device 100, and then the valve device 100 distributes the sludge to various sludge feeding points in the incinerator 300 (e.g., a first sludge feeding point 310 and a second sludge feeding point 320, which are symmetrically arranged). The incinerator 300 includes a first sludge feeding point 310 and a second sludge feeding point 320. Sludge is fed into the incinerator 300 from the first sludge feeding point 310 and the second sludge feeding point 320, and the sludge is incinerated in the incinerator 300, thereby completing the sludge treatment.

[0043] Valve device 100 can be a three-way valve, meaning it can include one inlet and two outlets, such as inlet 110, first outlet 122, and second outlet 124. However, this invention is not limited to this; valve device 100 can also be, for example, a four-way valve, a five-way valve, or any other suitable multi-way valve. Figure 1Only one valve device 100 is shown, but the sludge treatment system 10 may also have multiple (e.g., 2, 3, or any other suitable number) valve devices. For example, if the sludge treatment system has M N-way valves, then the incinerator will have M*N symmetrically arranged sludge dosing points.

[0044] Figure 2 and Figure 3 A schematic diagram of a valve device 100 according to an embodiment of the present invention is shown, with the valve device 100 in a first position and a second position. The valve device 100 mainly includes an inlet 110, a first outlet 122, a second outlet 124, and a valve core 130. The extending directions of the first outlet 122 and the second outlet 124 can be perpendicular to each other, and the extending direction of the inlet 110 can form a 135° angle with both the extending directions of the first outlet 122 and the second outlet 124. It should be understood that the angles formed between the inlet 110, the first outlet 122, and the second outlet 124 are merely exemplary, and the present invention is not limited thereto.

[0045] Inlet 110 is connected to sludge pump 200, which pumps sludge through inlet 110 to valve device 100. Inlet 110 may include a connection 112, which is positioned in the direction of sludge flow (i.e., as shown in the image). Figure 2 or Figure 3 The outlet 124 gradually narrows (in the upward direction). By providing the connecting part 112, sludge pumps 200 and valve devices 100 of different sizes can be adapted. The first outlet 122 is connected to the first sludge feeding point 310 of the incinerator 300, allowing sludge to leave the valve device 100 from the first outlet 122 and flow to the first sludge feeding point 310, and finally be fed into the incinerator 300 from the first sludge feeding point 310. The second outlet 124 is connected to the second sludge feeding point 320 of the incinerator 300, allowing sludge to leave the valve device 100 from the second outlet 124 and flow to the second sludge feeding point 320, and finally be fed into the incinerator 300 from the second sludge feeding point 320.

[0046] A receiving cavity C is formed between inlet 110, first outlet 122, and second outlet 124, and a valve core 130 is located within the receiving cavity C. The receiving cavity C has a cylindrical shape, and the valve core 130 extends between the circumferential inner walls of the receiving cavity C and passes through the central axis of the receiving cavity C. The valve core 130 is rotatable about the central axis of the receiving cavity C to regulate the amount of sludge exiting the valve device 100 from the first outlet 122 and the second outlet 124. Preferably, the valve core 130 has a wedge shape. That is, the valve core 130 has a structure that is wider in the middle and shorter at both ends. The valve core 130 gradually narrows from the central axis of the receiving cavity C to the circumferential inner wall of the receiving cavity C. Because semi-dry sludge has high viscosity, the wedge-shaped valve core 130 is particularly suitable for conveying semi-dry sludge. In particular, compared to a spherical valve core, semi-dry sludge is less likely to adhere to the wedge-shaped valve core 130, making the valve device 100 less prone to clogging.

[0047] like Figure 2 and Figure 3 As shown, the valve core 130 can be positioned in a first position (e.g., around the central axis of the receiving cavity C) Figure 2 (as shown) and the second position (as shown) Figure 3 The valve core 130 rotates between the first and second positions. When the valve core 130 is in the first position, the opening between the inlet 110 and the first outlet 122 is at its maximum, and the inlet is not connected to the second outlet 124. In this case, all sludge entering the valve device 100 leaves the valve device from the first outlet 122 and is then fed into the incinerator 300 from the first sludge feeding point 310. When the valve core 130 is in the second position, the opening between the inlet 110 and the second outlet 124 is at its maximum, and the inlet is not connected to the first outlet 122. In this case, all sludge entering the valve device 100 leaves the valve device from the second outlet 124 and is then fed into the incinerator 300 from the second sludge feeding point 320. When the valve core 130 rotates from the first position toward the second position (as shown), the valve core 130 rotates between the first and second positions. Figure 2 As shown in the clockwise rotation, the channel opening between inlet 110 and first outlet 122 gradually decreases, while the channel opening between inlet 110 and second outlet 124 gradually increases. When valve core 130 rotates from the second position toward the first position (as shown in the clockwise rotation), the opening of the channel between inlet 110 and second outlet 124 gradually decreases. Figure 3 As the valve core 130 rotates counterclockwise (as shown), the opening of the passage between inlet 110 and the first outlet 122 gradually increases, while the opening of the passage between inlet 110 and the second outlet 124 gradually decreases. This arrangement ensures that during the rotation of the valve core 130, inlet 110 is connected to one of the two outlets 122 or 124; in other words, there is no situation where inlet 110 is not connected to either outlet 122 or 124. This prevents pressure buildup in the upstream sludge pump 200 due to a lack of connection between inlet 110 and either outlet 122 or 124, thus preventing damage to the sludge pump 200 under excessive pressure.

[0048] like Figure 4 As shown, the valve device 100 also includes an actuator 140 (e.g., a pneumatic actuator), which is connected to the valve core 130 via a valve stem 150. This allows the valve core 130 to be actuated via the valve stem 150 to control its position. Because semi-dry sludge is a non-Newtonian fluid, even if the valve core 130 is in the exact middle position between the first and second positions, the amount of sludge flowing from the first outlet 122 and the second outlet 124 of the valve device 100 may be uneven. The uniformity of the sludge flowing from the multiple outlets of the valve device 100 is crucial for the sludge treatment system 10. Uneven sludge flow from the multiple outlets of the valve device 100 will result in uneven sludge input to the multiple sludge feeding points of the incinerator 300, leading to different combustion conditions in different areas of the incinerator 300. In this situation, the temperature distribution within the incinerator 300 is uneven, resulting in poor stability of the sludge incineration process. Therefore, in this invention, the actuator 140 controls the position of the valve core 130 so that the amount of sludge flowing out of the valve device 100 from the first outlet 122 and the second outlet 124 is substantially the same, so as to achieve uniform combustion in the incinerator 300.

[0049] For example, when it is detected that the amount of sludge flowing out from the first outlet 122 is significantly greater than the amount of sludge flowing out from the second outlet 124, the actuator 140 controls the valve core 130 to rotate toward the second position to reduce the opening between the inlet 110 and the first outlet 122, and increase the opening between the inlet 110 and the second outlet 124, thereby reducing the amount of sludge flowing out from the first outlet 122 and increasing the amount of sludge flowing out from the second outlet 124, until the amount of sludge flowing out from the first outlet 122 is approximately equal to the amount of sludge flowing out from the second outlet 124. Similarly, when it is detected that the amount of sludge flowing out from the first outlet 122 is significantly less than the amount of sludge flowing out from the second outlet 124, the actuator 140 controls the valve core 130 to rotate toward the first position to increase the opening between the inlet 110 and the first outlet 122 and decrease the opening between the inlet 110 and the second outlet 124, thereby increasing the amount of sludge flowing out from the first outlet 122 and decreasing the amount of sludge flowing out from the second outlet 124 until the amount of sludge flowing out from the first outlet 122 is approximately equal to the amount of sludge flowing out from the second outlet 124.

[0050] Specifically, a first temperature sensor 312 and a second temperature sensor 322 can be respectively installed at the first sludge addition point 310 and the second sludge addition point 320 of the incinerator 300. The first temperature sensor 312 is configured to detect the temperature at the first sludge addition point 310, and the second temperature sensor 322 is configured to detect the temperature at the second sludge addition point 320. If the temperature sensed by the first temperature sensor 312 is significantly higher than the temperature sensed by the second temperature sensor 322, it indicates that the amount of sludge fed into the incinerator from the first outlet 122 via the first sludge addition point 310 is significantly higher than the amount of sludge fed into the incinerator from the second outlet 124 via the second sludge addition point 320. In this case, the actuator 140 controls the valve core 130 to rotate toward the second position to reduce the opening between the inlet 110 and the first outlet 122 and increase the opening between the inlet 110 and the second outlet 124, thereby reducing the amount of sludge flowing out of the first outlet 122 and increasing the amount of sludge flowing out of the second outlet 124, until the temperature sensed by the first temperature sensor 312 and the temperature sensed by the second temperature sensor 322 are approximately equal. This indicates that the amount of sludge flowing out of the first outlet 122 is approximately equal to the amount of sludge flowing out of the second outlet 124. Similarly, if the temperature sensed by the first temperature sensor 312 is significantly lower than the temperature sensed by the second temperature sensor 322, it indicates that the amount of sludge fed into the incinerator from the first outlet 122 via the first sludge addition point 310 is significantly lower than the amount of sludge fed into the incinerator from the second outlet 124 via the second sludge addition point 320. In this case, the actuator 140 controls the valve core 130 to rotate toward the first position to increase the opening between the inlet 110 and the first outlet 122 and decrease the opening between the inlet 110 and the second outlet 124, thereby increasing the amount of sludge flowing out of the first outlet 122 and decreasing the amount of sludge flowing out of the second outlet 124, until the temperature sensed by the first temperature sensor 312 and the temperature sensed by the second temperature sensor 322 are approximately equal. This indicates that the amount of sludge flowing out of the first outlet 122 is approximately equal to the amount of sludge flowing out of the second outlet 124.

[0051] Alternatively, a first flow sensor can be installed at the first outlet 122, and a second flow sensor can be installed at the second outlet 124. The first and second flow sensors detect the amount of sludge flowing out of the first outlet 122 and the second outlet 124, respectively. The actuator 140 places the valve core 130 in an appropriate position based on the flow rates detected by the first and second flow sensors, so that the amount of sludge flowing out of the first outlet 122 and the second outlet 124 is substantially equal.

[0052] Preferably, actuator 140 can be configured to actuate valve core 130 to a first position when the first outlet 122 is blocked. This allows all the pressure output by sludge pump 200 to be applied to the first outlet 122, facilitating the unblocking of the first outlet 122 with the aforementioned pressure. Similarly, actuator 140 can be configured to actuate valve core 130 to a second position when the second outlet 124 is blocked. This allows all the pressure output by sludge pump 200 to be applied to the second outlet 124, facilitating the unblocking of the second outlet 124 with the aforementioned pressure.

[0053] Furthermore, the incinerator 300 can be a bubbling fluidized bed, with the valve core 130 periodically switching between a first position and a second position. In other words, the valve core 130 can switch positions at fixed intervals. For example, it might be in the first position in the first minute, the second position in the second minute, the first position in the third minute, the second position in the fourth minute, and so on. This achieves the effect of pulsed combustion to promote fluidization of the fluidized bed.

[0054] This document describes in detail several exemplary embodiments of the present disclosure with reference to preferred embodiments. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the concept of the present disclosure, and various technical features and structures proposed in the present disclosure can be combined without exceeding the protection scope of the present disclosure, the protection scope of the present disclosure being determined by the appended claims.

Claims

1. A sludge treatment system, characterized by, include: Sludge pump, configured to pump sludge; Valve device, including: - An inlet connected to the sludge pump, from which sludge flows into the valve device; - Multiple outlets, from which sludge flows out of the valve device; - A receiving cavity is provided at the connection between the inlet and the plurality of outlets; - A valve core, located in the receiving cavity, is rotatable to control the amount of sludge flowing out from the plurality of outlets; An incinerator configured to incinerate sludge, the incinerator including multiple sludge feeding points, each sludge feeding point being connected to a corresponding outlet of the valve device; The valve device further includes an actuator configured to actuate the valve core such that the amount of sludge flowing out from each outlet is substantially the same.

2. The sludge treatment system of claim 1, wherein The valve device includes an inlet and two outlets, the two outlets being a first outlet and a second outlet, respectively.

3. The sludge treatment system of claim 2, wherein The valve core is rotatable between a first position and a second position. When the valve core is in the first position, the channel opening between the inlet and the first outlet is at its maximum, and the inlet and the second outlet are not connected. When the valve core is in the second position, the channel opening between the inlet and the second outlet is at its maximum, and the inlet is not connected to the first outlet; As the valve core rotates from the first position toward the second position, the channel opening between the inlet and the first outlet gradually decreases, while the channel opening between the inlet and the second outlet gradually increases.

4. The sludge treatment system of claim 3, wherein A temperature sensor is installed at the sludge addition point, and the actuator actuates the valve core based on the temperature sensed by the temperature sensor.

5. The sludge treatment system of claim 3, wherein The actuator is configured as follows: When the first outlet is blocked, the valve core is actuated to the first position; When the second outlet is blocked, the valve core is actuated to the second position.

6. The sludge treatment system of claim 1, wherein The receiving cavity is cylindrical, and the valve core extends between the circumferential inner walls of the receiving cavity and passes through the central axis of the receiving cavity, and the valve core rotates about the central axis of the receiving cavity.

7. The sludge treatment system of claim 6, wherein The valve core is wedge-shaped and gradually narrows from the central axis of the receiving cavity to the circumferential inner wall of the receiving cavity.

8. The sludge treatment system of claim 3, wherein The incinerator is a bubbling fluidized bed, and the valve core periodically switches to the first position or the second position.

9. The sludge treatment system of claim 3, wherein The two outlets extend in perpendicular directions to each other, and the inlet extends at a 135° angle to both outlets.

10. The sludge treatment system of claim 1, wherein, The actuator is a pneumatic actuator configured to actuate the valve core by gas pressure.

Images