Sludge drying treatment system

Abstract

The utility model discloses a sludge drying treatment system which comprises a paddle drying machine used for carrying out drying treatment on wet sludge; the paddle dryer is at least provided with three inlets including a first inlet, a second inlet and a third inlet which are used for respectively introducing the adjusted steam, wet sludge and carrier gas; the paddle dryer is at least provided with three outlets including a first outlet, a second outlet and a third outlet which are used for discharging steam condensed water, dry sludge and water vapor respectively; the carrier gas fan and the first carrier gas fan outlet are arranged between the third outlet and the third inlet, the inlet of the carrier gas fan is connected with the third outlet, the first carrier gas fan outlet is connected with the third inlet, and the carrier gas fan conveys and processes water vapor discharged by the paddle drying machine to form carrier gas. The sludge drying system has the beneficial effects that the sludge drying process is monitored and adjusted in real time, the negative pressure of the system is maintained, the carrier gas can be recycled by adopting the carrier gas fan, the energy consumption of the system is reduced, odor is prevented from overflowing, and the energy utilization efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of environmental protection, in particular to a sludge drying treatment system. Background Art

[0002] Sludge incineration technology has the characteristics of significant sludge reduction, stabilization and harmlessness. At present, the water content of municipal sludge after centrifugal dehydration is usually around 80%. If incineration is used, the water content needs to be controlled at 45-60%, and the water content needs to be further reduced.

[0003] The effectiveness of sludge drying not only affects factors such as processing volume, incineration conditions, and system reliability, but improper design will also cause major safety accidents. The existing sludge drying process has problems such as large footprint, high system energy consumption, heavy tail gas treatment burden, and odor overflow. Utility Model Content

[0004] In order to solve the above problems, the purpose of the utility model is to provide a sludge drying treatment system, which can monitor and adjust the sludge drying process in real time, maintain the system negative pressure and ensure the safety of the system, and adopt a carrier gas fan to allow the carrier gas to be recycled, which not only reduces the system energy consumption but also avoids the overflow of odor.

[0005] The utility model provides a sludge drying treatment system, the system comprising:

[0006] Paddle dryer, used to dry wet sludge;

[0007] The paddle dryer is provided with at least three inlets, including a first inlet, a second inlet and a third inlet, for respectively receiving steam, the wet sludge and the carrier gas, and a sludge inlet regulating valve is provided on the pipeline connected to the second inlet;

[0008] The paddle dryer is provided with at least three outlets, including a first outlet, a second outlet and a third outlet, to discharge steam condensate, dry sludge and water vapor respectively;

[0009] A carrier gas oxygen content detection meter, a carrier gas pressure detection meter, a carrier gas temperature detection meter and a carrier gas flow detection meter are sequentially arranged on the pipeline connecting the third outlet and the cyclone dust collector.

[0010] A carrier gas blower is provided with a first carrier gas blower outlet, the first carrier gas blower outlet is arranged between the third outlet and the third inlet, the inlet of the carrier gas blower is connected to the third outlet, the first carrier gas blower outlet is connected to the third inlet, and the carrier gas blower is used to transport and process the water vapor discharged by the paddle dryer to form the carrier gas;

[0011] A cyclone dust collector, a carrier gas condenser and a demister are sequentially arranged between the third outlet and the inlet of the carrier gas blower;

[0012] A carrier gas regulating valve is provided between the first carrier gas blower outlet and the third inlet;

[0013] A circulating carrier gas flow detection meter is provided between the carrier gas regulating valve and the third inlet;

[0014] The carrier air blower is also provided with a second carrier air blower outlet, and the second carrier air blower outlet is communicated with the odor treatment device.

[0015] As a further improvement of the utility model, the system further includes:

[0016] A cooling and decompression device, wherein the inlet of the cooling and decompression device is connected to the steam to be processed, and the outlet of the cooling and decompression device is connected to the first inlet, and is used to adjust the parameters of the steam to be processed so that the steam entering the paddle dryer meets the preset temperature and pressure values.

[0017] As a further improvement of the utility model, a steam pressure detection gauge and a steam temperature detection gauge are provided in sequence on the pipeline between the temperature-reducing and pressure-reducing device and the paddle dryer.

[0018] As a further improvement of the utility model, a drying sludge pressure detection gauge is provided on the pipeline connected to the second outlet, and a steam trap is provided on the pipeline connected to the first outlet.

[0019] The beneficial effects of the utility model are as follows: the sludge drying treatment system of the utility model can monitor and adjust the sludge drying process in real time, maintain the system negative pressure and ensure the system safety, and adopts the carrier gas fan so that the carrier gas can be recycled, which not only reduces the energy consumption of the system, but also avoids the overflow of odor, improves the energy utilization efficiency, reduces pollution, and saves energy and is environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0021] Figure 1 This is a structural block diagram of the sludge drying treatment system according to the first embodiment of the utility model;

[0022] Figure 2 This is a structural block diagram of the sludge drying treatment system according to the second embodiment of the utility model;

[0023] Figure 3 This is a schematic diagram of the process flow of the sludge drying treatment system described in the second embodiment of the utility model.

[0024] In the figure,

[0025] 1. Mud inlet regulating valve; 2. Paddle dryer; 3. Carrier gas oxygen content detection meter; 4. Carrier gas pressure detection meter; 5. Carrier gas temperature detection meter; 6. Carrier gas flow detection meter; 7. Cyclone dust collector; 8. Carrier gas condenser; 9. Defogger; 10. Carrier gas fan; 11. Carrier gas regulating valve; 12. Circulating carrier gas flow detection meter; 13. Odor treatment device; 14. Drying sludge pressure detection meter; 15 Cooling and pressure reduction device; 16. Steam pressure detection meter; 17. Steam temperature detection meter; 18. Steam trap. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, in the description of the present utility model, the terms used are only for illustrative purposes and are not intended to limit the scope of the present utility model. The terms "include" and / or "comprise" are used to specify the existence of the elements, steps, operations and / or components, but do not exclude the existence or addition of one or more other elements, steps, operations and / or components. The terms "first", "second" and the like may be used to describe various elements, do not represent the order, and do not limit these elements. In addition, in the description of the present utility model, unless otherwise specified, the meaning of "multiple" is two and more than two. These terms are only used to distinguish one element from another element. In conjunction with the following drawings, these and / or other aspects become apparent, and it is easier for a person of ordinary skill in the art to understand the description of the embodiments described in the present utility model. The accompanying drawings are used to depict the embodiments described in the present utility model for illustrative purposes only. Those skilled in the art will easily recognize from the following description that, without departing from the principles described in the present utility model, alternative embodiments of the structures and methods shown in the present utility model can be adopted.

[0029] like Figure 1 As shown, a sludge drying treatment system according to the first embodiment of the utility model comprises:

[0030] Paddle dryer 2, used for drying wet sludge;

[0031] The paddle dryer 2 is provided with at least three inlets, including a first inlet, a second inlet and a third inlet, for respectively receiving steam, the wet sludge and the carrier gas;

[0032] The paddle dryer 2 is provided with at least three outlets, including a first outlet, a second outlet and a third outlet, to discharge steam condensate, dry sludge and water vapor respectively;

[0033] The carrier gas fan 10 is provided with a first carrier gas fan outlet, which is arranged between the third outlet and the third inlet, the inlet of the carrier gas fan 10 is connected to the third outlet, and the first carrier gas fan outlet is connected to the third inlet. The carrier gas fan 10 is used to transport and process the water vapor discharged from the paddle dryer 2 to form the carrier gas.

[0034] like Figure 1 As shown, steam enters the blade dryer 2 through the first inlet of the blade dryer 2 to warm up the blade dryer 2, and the wet sludge enters the blade dryer 2 from the second inlet of the blade dryer 2 and is heated by the steam to gradually move toward the second outlet of the blade dryer 2. The dry sludge that has been dried is discharged from the second outlet of the blade dryer 2. During the drying process, the steam is continuously cooled and converted into steam condensate, which is discharged from the first outlet of the blade dryer 2. The water vapor generated during the drying process flows inside the blade dryer 2. , under the action of the carrier air fan 10, the wet sludge is discharged into the carrier air fan 10 through the third outlet of the paddle dryer 2, and is processed and transported by the carrier air fan 10 to form carrier gas, which enters the paddle dryer 2 through the third inlet. The residual temperature of the carrier gas and the enhanced convection are used to improve the drying efficiency of the wet sludge. The sludge drying treatment system described in the first embodiment of the utility model ensures the safety of the system. The carrier air fan is used to make the carrier gas recyclable, which not only reduces the energy consumption of the system, but also avoids the overflow of odor, improves the energy utilization efficiency, reduces pollution, and saves energy and protects the environment.

[0035] In an optional embodiment, the system further includes: a cooling and decompression device 15, wherein the inlet of the cooling and decompression device 15 is connected to the steam to be processed, and the outlet of the cooling and decompression device 15 is connected to the first inlet, for adjusting the parameters of the steam to be processed so that the steam entering the blade dryer 2 meets the preset temperature value and pressure value (the specific preset values ​​of the temperature and pressure here can be manually set according to the operating conditions, and the specific temperature and pressure are not specifically limited). Optionally, a steam pressure detection meter 16 and a steam temperature detection meter 17 are provided on the pipeline between the cooling and decompression device 15 and the blade dryer 2 in turn, so as to monitor the temperature and pressure of the steam entering the blade dryer 2 in real time, so that the regulated steam entering the blade dryer 2 is within a suitable temperature and pressure operating range.

[0036] In an optional implementation, a mud inlet regulating valve 1 is provided on the pipe connected to the second inlet. The mud inlet regulating valve 1 is slowly opened before the blade dryer 2 enters the mud, so that the pipe connected to the second inlet (the pipe entering the wet sludge) is gradually depressurized toward the blade dryer 2 until the pressure at both ends is balanced. The mud inlet regulating valve 1 of the blade dryer 2 is fully opened to ensure the safety of the system.

[0037] In an optional implementation manner, a dried sludge pressure detection gauge 14 is provided on the pipeline connected to the second outlet for detecting the pressure of the second outlet. Optionally, a steam trap 18 is provided on the pipeline connected to the first outlet, and the discharge of the steam condensate is controlled by the steam trap 18.

[0038] In an optional embodiment, a cyclone dust collector 7, a carrier gas condenser 8 and a demister 9 are sequentially provided between the third outlet and the inlet of the carrier gas fan 10. It can be understood that the water vapor generated during the drying process flows inside the blade dryer 2, and is discharged through the third outlet of the blade dryer 2 under the action of the carrier gas fan 10 to enter the cyclone dust collector 7 for dust removal. Optionally, a carrier gas oxygen content detection meter 3, a carrier gas pressure detection meter 4, a carrier gas temperature detection meter 5 and a carrier gas flow detection meter 6 are sequentially provided on the pipeline connecting the third outlet and the cyclone dust collector 7 to monitor the oxygen content value, pressure value, temperature value and flow value of the water vapor to ensure that the oxygen content is always maintained below the safety limit during operation, and then enter the carrier gas condenser 8 and the demister 9 to cool down and reduce the water vapor content, and then enter the carrier gas fan 10, and after being processed and transmitted by the carrier gas fan 10, a carrier gas is formed. The carrier gas enters the blade dryer 2 through the third inlet, and the residual temperature of the carrier gas is used to improve the drying efficiency of the wet sludge. Preferably, the carrier gas blower 10 uses a variable frequency blower on the market, and performs signal interlocking with the drying sludge pressure detection meter 14. By real-time monitoring of the system pressure, the variable frequency blower is adjusted to always maintain the system negative pressure, avoid environmental pollution caused by odor overflow, and ensure safe operation of the system.

[0039] The operation of the carrier gas blower 10 keeps the second outlet of the blade dryer 2 in a negative pressure state at all times, ensuring the safety of the system. The carrier gas blower allows the carrier gas to be recycled, which not only reduces the energy consumption of the system, but also avoids the leakage of odor, improves the energy utilization efficiency, reduces pollution, and saves energy and protects the environment.

[0040] like Figure 2 , 3 As shown, the sludge drying treatment system described in the second embodiment of the utility model is different from the first embodiment in that the carrier air fan 10 also includes a second carrier air fan outlet, and the second carrier air fan outlet is connected to the odor treatment device 13. The water vapor generated in the drying process flows inside the blade dryer 2, and is discharged through the third outlet of the blade dryer 2 under the action of the carrier air fan 10 to enter the cyclone dust collector 7 for dust removal, and then enters the carrier air condenser 8 and the demister 9 for cooling and reducing the water vapor content, and then enters the carrier air fan 10 to form a carrier gas. A part of the carrier gas passing through the carrier air fan 10 flows through the carrier A gas regulating valve 11 enters the third inlet of the blade dryer 2, and the other part enters the odor treatment device 13 for further deep treatment. Optionally, a carrier gas regulating valve 11 is provided between the first carrier gas fan outlet and the third inlet, and the two parts of the carrier gas flow are adjusted and distributed by adjusting the opening of the carrier gas regulating valve 11. Under the premise of ensuring the processing capacity, the residual temperature of the carrier gas is used to the maximum extent to improve the wet sludge drying efficiency. Optionally, a circulating carrier gas flow detection meter 12 is provided between the carrier gas regulating valve 11 and the third inlet to monitor the carrier gas flow circulating into the blade dryer 2 in real time.

[0041] The sludge drying treatment system described in the utility model adopts steam as a heat source to dry wet sludge. A cooling and pressure reducing device is arranged at the steam inlet to maintain the steam parameters within a suitable operating range. A carrier gas fan and a carrier gas regulating valve are used to circulate part of the carrier gas back to improve the efficiency of discharging water vapor inside the paddle dryer, and excess odor enters the odor treatment device. The carrier gas fan adopts a variable frequency fan and is signal-interlocked with a drying sludge pressure detection meter to always maintain a negative pressure in the system to avoid environmental pollution caused by odor overflow.

[0042] The sludge drying treatment system described in the utility model can monitor and adjust the sludge drying process in real time, maintain the system negative pressure and ensure the system safety. The carrier gas fan is used to recycle the carrier gas, which not only reduces the energy consumption of the system, but also avoids the overflow of odor, improves the energy utilization efficiency, reduces pollution, and saves energy and is environmentally friendly.

[0043] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0044] In addition, it will be understood by those skilled in the art that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0045] It will be appreciated by those skilled in the art that, although the present invention has been described with reference to exemplary embodiments, various changes may be made and its elements may be replaced with equivalents without departing from the scope of the present invention. In addition, many modifications may be made to adapt specific circumstances or materials to the teachings of the present invention without departing from the essential scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed, but the present invention will include all embodiments falling within the scope of the appended claims.

Claims

1. A sludge drying treatment system, characterized in that: The system comprises: Paddle dryer, used to dry wet sludge; The paddle dryer is provided with at least three inlets, including a first inlet, a second inlet and a third inlet, for respectively receiving steam, the wet sludge and the carrier gas, and a sludge inlet regulating valve is provided on the pipeline connected to the second inlet; The paddle dryer is provided with at least three outlets, including a first outlet, a second outlet and a third outlet, to discharge steam condensate, dry sludge and water vapor respectively; A carrier gas blower is provided with a first carrier gas blower outlet, the first carrier gas blower outlet is arranged between the third outlet and the third inlet, the inlet of the carrier gas blower is connected to the third outlet, the first carrier gas blower outlet is connected to the third inlet, and the carrier gas blower is used to transport and process the water vapor discharged by the paddle dryer to form the carrier gas; A cyclone dust collector, a carrier gas condenser and a demister are sequentially arranged between the third outlet and the inlet of the carrier gas blower; The pipeline connecting the third outlet and the cyclone dust collector is provided with a carrier gas oxygen content detection meter, a carrier gas pressure detection meter, a carrier gas temperature detection meter and a carrier gas flow detection meter in sequence; A carrier gas regulating valve is provided between the first carrier gas blower outlet and the third inlet; A circulating carrier gas flow detection meter is provided between the carrier gas regulating valve and the third inlet; The carrier air blower is also provided with a second carrier air blower outlet, and the second carrier air blower outlet is communicated with the odor treatment device.

2. The system according to claim 1, characterized in that The system further comprises: A cooling and decompression device, wherein the inlet of the cooling and decompression device is connected to the steam to be processed, and the outlet of the cooling and decompression device is connected to the first inlet, and is used to adjust the parameters of the steam to be processed so that the steam entering the paddle dryer meets the preset temperature and pressure values.

3. The system according to claim 2, characterized in that A steam pressure detection gauge and a steam temperature detection gauge are provided on the pipeline between the temperature reduction and pressure reduction device and the blade dryer in sequence.

4. The system according to claim 1, characterized in that A drying sludge pressure detection gauge is arranged on the pipeline connected to the second outlet, and a steam trap is arranged on the pipeline connected to the first outlet.

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