A device for preventing odor leakage of a sludge drying fan system

Abstract

This utility model discloses an odor-preventing device for sludge drying blower systems, comprising a detachable sealing cover, a first connecting pipe, a second connecting pipe, a negative pressure monitoring component, and a negative pressure regulating component. The detachable sealing cover includes a shaft seal sealing cover and a flange sealing cover. The shaft seal sealing cover is positioned outside the blower shaft seal, and the flange sealing cover is positioned at the blower outlet flexible connection. This utility model discloses an odor-preventing device for sludge drying blower systems, overcoming the shortcomings of existing technologies such as shaft seal wear leakage, outlet flexible flange loosening leakage due to vibration, high labor costs, large spare parts consumption, and inability to systematically prevent leakage in sludge drying blower systems.

Description

Technical Field

[0001] This utility model belongs to the field of sludge treatment and disposal technology, specifically relating to an odor-preventing device suitable for sludge drying blower systems. Background Technology

[0002] Sludge drying is a crucial step in the sludge treatment and disposal process. The drying exhaust gas produced during this process contains a strong odor and a large amount of dust particles. If the exhaust gas leaks into the workshop space, it will not only seriously pollute the operating environment but may also harm the health of the workers, and it will not meet the relevant environmental emission requirements.

[0003] Currently, conventional blowers used in sludge drying systems typically employ packing seals, skeleton seals, carbon ring seals, or mechanical seals at their shaft seals. However, due to the blowers operating at high speeds for extended periods, the seals inevitably experience wear. As operating time increases, gaps gradually form at the seals, allowing drying exhaust gases to leak into the surrounding space.

[0004] Furthermore, as a high-speed rotating motor, the fan generates continuous vibration during long-term operation. This vibration can cause the flange connection bolts between the fan inlet / outlet and the flexible joint to loosen. While the fan inlet is under strong negative pressure, preventing external gas leakage into the space even with slight loosening of the flange, the fan outlet is under strong positive pressure. If the flange loosens due to vibration, the drying exhaust gas will leak directly into the workshop space from the gaps, further exacerbating environmental pollution.

[0005] To address the aforementioned leakage problem, existing technologies typically involve frequently replacing shaft seals and repeatedly tightening flange bolts. This approach not only significantly increases the workload of manual maintenance but also leads to a substantial rise in the cost of spare parts. Furthermore, it fails to fundamentally and systematically resolve the odor leakage problem, and the leakage will continue to recur.

[0006] Therefore, further improvements will be made to address the aforementioned issues. Utility Model Content

[0007] The main purpose of this utility model is to provide an odor-proof leakage device suitable for sludge drying blower systems, overcoming the shortcomings of existing sludge drying blower systems, such as leakage at the shaft seal due to wear of the seals, leakage at the outlet flexible flange due to vibration loosening, and the high labor cost, large consumption of spare parts, and inability to systematically prevent leakage in existing countermeasures.

[0008] To achieve the above objectives, this utility model provides an odor-proof leakage device suitable for sludge drying blower systems, comprising a detachable sealing cover, a first connecting pipe, a second connecting pipe, a negative pressure monitoring component, and a negative pressure regulating component, wherein:

[0009] The detachable sealing cover includes a shaft seal sealing cover and a flange sealing cover. The shaft seal sealing cover is installed outside the fan shaft seal, and the flange sealing cover is installed at the fan outlet flexible connection.

[0010] The first end of the first connecting pipe is connected to the internal space of the sealing cover at the shaft seal and the second end is connected to the inlet pipe of the fan. The first end of the second connecting pipe is connected to the internal space of the sealing cover at the flange and the second end is connected to the inlet pipe of the fan. The first connecting pipe and the second connecting pipe are respectively used to create a negative pressure state inside the sealing cover at the shaft seal and the sealing cover at the flange through the strong negative pressure at the fan inlet.

[0011] The negative pressure monitoring component includes a first negative pressure gauge and a second negative pressure gauge, which are respectively installed on the housing of the shaft seal cover and the flange cover, and are used to monitor the negative pressure value in the corresponding sealing cover;

[0012] The negative pressure control component includes a first manual valve, a second manual valve, a first pipe disconnection connector, and a second pipe disconnection connector. The first manual valve and the first pipe disconnection connector are connected in series in the first connecting pipe, and the second manual valve and the second pipe disconnection connector are connected in series in the second connecting pipe. The manual valve is used to adjust the exhaust flow rate of the corresponding connecting pipe to control the negative pressure value in the corresponding sealing cover. The pipe disconnection connector is used to realize the (quick) separation of the corresponding sealing cover from the corresponding connecting pipe.

[0013] As a further preferred technical solution to the above technical solution, it also includes a fixing block, which is connected to the fan outlet duct, and the flange sealing cover is fixedly connected to the fixing block (since the duct wall is thin, a fixing block needs to be welded to the duct so that the flange sealing cover can be fixed to the duct).

[0014] As a further preferred technical solution to the above technical solution, the second end of the first connecting pipe and the second end of the second connecting pipe are combined and connected to the inlet pipe of the fan.

[0015] As a further preferred embodiment of the above technical solution, the first pipe disassembly connector is installed at one end of the first connecting pipe near the sealing cover of the shaft seal, and the second pipe disassembly connector is installed at one end of the second connecting pipe near the sealing cover of the flange (for easy and simple disassembly).

[0016] As a further preferred technical solution to the above technical solution, the first manual valve is installed at one end of the first connecting pipe near the fan inlet pipe, and the second manual valve is installed at one end of the second connecting pipe near the fan inlet pipe (for easy adjustment and control).

[0017] The beneficial effects of this utility model are as follows:

[0018] 1. Achieve systemic zero leakage: By setting up negative pressure sealing covers at key leakage points, an active leak prevention system is constructed using the negative pressure at the fan inlet, rather than relying on the passive sealing capability of the seals themselves. This fundamentally eliminates the leakage of dried exhaust gas from the shaft seal and the outlet flange, solving the problem that existing technologies cannot systematically prevent leakage.

[0019] 2. Reduced maintenance costs and workload: There is no need to frequently replace shaft seals or repeatedly tighten flange bolts. The leak-proof effect can be maintained simply by adjusting the manual valve according to the negative pressure gauge reading. At the same time, the detachable design of the sealing cover and the setting of the pipeline disassembly joint greatly simplifies the operation process of seal replacement, reduces the amount of manual maintenance, and reduces the frequency and cost of spare parts consumption.

[0020] 3. Improved accuracy in maintenance judgment: The negative pressure value inside the sealing cover is monitored in real time by a negative pressure gauge, providing a clear "numerical standard" for the replacement of the seal (i.e., the initial negative pressure cannot be maintained even if the manual valve is fully opened). This avoids the subjectivity and uncertainty of relying on experience to judge the timing of maintenance in existing technologies, and improves the accuracy and timeliness of maintenance.

[0021] 4. Simple operation and high reliability: The overall structure of the device is simple. The core components include only the sealing cover, connecting pipe, manual valve and negative pressure gauge. Operators only need to observe the negative pressure gauge reading and adjust the valve to complete daily operation and maintenance, without the need for complicated professional skills. At the same time, each component adopts a mature mechanical structure, which has high operational stability and low failure rate. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model.

[0023] Figure 2 yes Figure 1 A magnified view of a portion of region A in the middle.

[0024] The reference numerals in the attached drawings include: 11, sealing cover at the shaft seal; 12, sealing cover at the flange; 21, first connecting pipe; 22, second connecting pipe; 31, first negative pressure gauge; 32, second negative pressure gauge; 41, first manual valve; 42, second manual valve; 43, first pipe disconnect joint; 44, second pipe disconnect joint; 50, fixing block; 60, fan. Detailed Implementation

[0025] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0026] This utility model discloses an odor-preventing device suitable for sludge drying blower systems. The specific embodiments of the utility model are further described below with reference to preferred embodiments.

[0027] In the embodiments of this utility model, those skilled in the art will note that the sludge drying blower and the like involved in this utility model can be considered as prior art.

[0028] Preferred embodiment.

[0029] like Figure 1-2 As shown, this utility model discloses an odor-proof leakage device suitable for sludge drying blower systems, including a detachable sealing cover, a first connecting pipe 54, a second connecting pipe 55, a negative pressure monitoring component, and a negative pressure regulating component, wherein:

[0030] The detachable sealing cover includes a shaft seal sealing cover 11 and a flange sealing cover 12. The shaft seal sealing cover 11 is installed on the outside of the shaft seal of the fan 60, and the flange sealing cover 12 is installed at the outlet flexible connection of the fan 60.

[0031] The first end of the first connecting pipe 21 is connected to the internal space of the sealing cover 11 at the shaft seal and the second end is connected to the inlet pipe of the fan (at the inlet of the drying exhaust gas). The first end of the second connecting pipe 22 is connected to the internal space of the sealing cover 12 at the flange and the second end is connected to the inlet pipe of the fan. The first connecting pipe 21 and the second connecting pipe 22 are respectively used to create a negative pressure state inside the sealing cover 11 at the shaft seal and the sealing cover 12 at the flange through the strong negative pressure at the inlet of the fan.

[0032] The negative pressure monitoring component includes a first negative pressure gauge 31 and a second negative pressure gauge 32. The first negative pressure gauge 31 and the second negative pressure gauge 32 are respectively installed on the housing of the shaft seal cover 11 and the flange cover 12, and are used to monitor the negative pressure value in the corresponding sealing cover.

[0033] The negative pressure control component includes a first manual valve 41, a second manual valve 42, a first pipe disconnection connector 43, and a second pipe disconnection connector 44. The first manual valve 41 and the first pipe disconnection connector 43 are connected in series in the first connecting pipe 21, and the second manual valve 42 and the second pipe disconnection connector 44 are connected in series in the second connecting pipe 22. The manual valve is used to adjust the exhaust flow rate of the corresponding connecting pipe to control the negative pressure value in the corresponding sealing cover. The pipe disconnection connector is used to realize the (quick) separation of the corresponding sealing cover from the corresponding connecting pipe.

[0034] Specifically, it also includes a fixing block 50, which is connected to the outlet duct of the fan 60, and the flange sealing cover 12 is fixedly connected to the fixing block 50 (because the duct wall is thin, a fixing block needs to be welded on the duct so that the flange sealing cover can be fixed on the duct).

[0035] More specifically, the second end of the first connecting pipe 21 and the second end of the second connecting pipe 22 are combined and connected to the inlet pipe of the fan 60.

[0036] Furthermore, the first pipe disconnector 43 is installed at one end of the first connecting pipe 21 near the sealing cover 11 at the shaft seal, and the second pipe disconnector 44 is installed at one end of the second connecting pipe 22 near the sealing cover 12 at the flange (for easy and simple disconnection).

[0037] Furthermore, the first manual valve 41 is installed at one end of the first connecting pipe 11 near the inlet pipe of the fan 60, and the second manual valve 42 is installed at one end of the second connecting pipe 12 near the inlet pipe of the fan 60 (for easy adjustment and control).

[0038] Regarding this utility model:

[0039] Removable sealing covers are added to the shaft seal of the fan and the connection between the fan outlet and the flexible flange (for easy seal replacement and maintenance). These sealing covers are connected to the fan inlet via a connecting pipe. The strong negative pressure at the fan inlet draws air out of the sealing covers, creating a negative pressure environment to prevent odor leakage. A manual valve is installed on the pipe, and a negative pressure gauge is installed on the sealing covers. The opening of the manual valve is controlled by the negative pressure reading on the gauge.

[0040] When the machine is first started, the seal is intact and there is no leakage of the dried exhaust gas. When running under negative pressure, the negative pressure gauge maintains a specific value. When the seal leaks after running for a long time, the negative pressure value will gradually decrease due to the increase in the amount of gas inside the sealing cover. By opening the manual valve, the negative pressure value in the sealing cover can be returned to the initial set value. When the initial negative pressure set value cannot be maintained even when the manual valve is fully open after running for a long time, it is time to replace the seal.

[0041] It is worth mentioning that the technical features such as the sludge drying blower involved in this utility model patent application should be regarded as prior art. The specific structure, working principle, and possible control methods and spatial arrangement of these technical features can be adopted using conventional choices in the field, and should not be regarded as the inventive point of this utility model patent. This utility model patent will not elaborate further.

[0042] For those skilled in the art, modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A device for preventing odor leakage in a sludge drying blower system, characterized in that, Includes a detachable sealing cover, a first connecting pipe, a second connecting pipe, a negative pressure monitoring component, and a negative pressure control component, wherein: The detachable sealing cover includes a shaft seal sealing cover and a flange sealing cover. The shaft seal sealing cover is installed outside the fan shaft seal, and the flange sealing cover is installed at the fan outlet flexible connection. The first end of the first connecting pipe is connected to the internal space of the sealing cover at the shaft seal and the second end is connected to the inlet pipe of the fan. The first end of the second connecting pipe is connected to the internal space of the sealing cover at the flange and the second end is connected to the inlet pipe of the fan. The first connecting pipe and the second connecting pipe are respectively used to create a negative pressure state inside the sealing cover at the shaft seal and the sealing cover at the flange through the strong negative pressure at the fan inlet. The negative pressure monitoring component includes a first negative pressure gauge and a second negative pressure gauge. The first negative pressure gauge and the second negative pressure gauge are respectively installed on the sealing cover at the shaft seal and the sealing cover at the flange, and are used to monitor the negative pressure value in the corresponding sealing cover. The negative pressure control component includes a first manual valve, a second manual valve, a first pipe disconnection connector, and a second pipe disconnection connector. The first manual valve and the first pipe disconnection connector are connected in series in the first connecting pipe, and the second manual valve and the second pipe disconnection connector are connected in series in the second connecting pipe. The manual valve is used to adjust the exhaust flow rate of the corresponding connecting pipe to control the negative pressure value in the corresponding sealing cover, and the pipe disconnection connector is used to disconnect the corresponding sealing cover from the corresponding connecting pipe.

2. The device for preventing odor leakage according to claim 1, wherein It also includes a fixing block, which is connected to the fan outlet duct, and the sealing cover at the flange is fixedly connected to the fixing block.

3. The device for preventing odor leakage according to claim 1, wherein The second end of the first connecting pipe and the second end of the second connecting pipe are combined and connected to the inlet pipe of the fan.

4. The device for preventing odor leakage according to claim 1, wherein The first pipe disconnector is installed at one end of the first connecting pipe near the sealing cover of the shaft seal, and the second pipe disconnector is installed at one end of the second connecting pipe near the sealing cover of the flange.

5. The device for preventing odor leakage according to claim 1, wherein The first manual valve is installed at one end of the first connecting pipe near the fan inlet pipe, and the second manual valve is installed at one end of the second connecting pipe near the fan inlet pipe.

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