Air outlet processing device and fan with same

Abstract

The air outlet processing device comprises an air outlet pipeline, one end of the air outlet pipeline is provided with a connector matched with an air outlet of a desulfurization and oxidation fan, and the other end of the air outlet pipeline is provided with an air outlet valve connected with the air outlet pipeline and an air inlet pipeline of a desulfurization system; a drainage pipe is arranged on the air outlet pipeline, and a drainage valve is arranged on the drainage pipe; a one-way valve and an emptying pipeline are further arranged on the air outlet pipeline, and an emptying valve and a silencer are sequentially arranged on the emptying pipeline; by arranging the air outlet valve, the air inlet pipeline can be closed when the fan does not run for a long time or is overhauled, condensate accumulation can be avoided by arranging the drainage pipe, and by arranging the emptying pipe and the emptying valve, the internal pressure of the pipeline can be emptied before the fan is switched and started, so that the starting energy consumption of the fan is reduced; the one-way valve is arranged so that air of the main pipeline cannot flow backwards into the fan system before the fan is started, and therefore the safety and reliability of the fan system can be improved through the air outlet processing device.

Description

Technical Field

[0001] The present application relates to the technical field of fans, and in particular to an air outlet treatment device used at an air outlet of a desulfurization and oxidation fan in a thermal power plant, and a desulfurization and oxidation fan equipped with the device. Background Art

[0002] In thermal power plants, thermal power units consume significant amounts of energy during startup and shutdown, and frequent startups and shutdowns can also cause unnecessary wear and tear on equipment. Therefore, ensuring continuous and stable operation of thermal power units is crucial. Desulfurization oxidation fans are critical equipment in thermal power unit operation, and their stable operation directly impacts the desulfurization treatment effectiveness of the entire desulfurization system. To ensure continuous operation of thermal power units, a one-on-one backup fan configuration is typically employed. This means that while one set of fans is operating, the other is on standby. This allows the backup fan to continue operating if one fails or requires maintenance.

[0003] The switching process for fans in a thermal power plant is as follows: First, confirm the need for switching. If a switch is confirmed, check the status of the standby fan to ensure that the pipes connecting it to the desulfurization system are unobstructed. Then, deactivate the current fan and gradually reduce the load of the operating fan. When the load drops to an appropriate level, shut down the operating fan and start the standby fan. Switching the desulfurization and oxidation fans in a thermal power plant is a critical step in ensuring the continuous and stable operation of the system. Proper operation procedures can effectively avoid system downtime and ensure desulfurization efficiency.

[0004] At present, the air outlet of the desulfurization oxidation fan is connected to the desulfurization system pipeline through the air outlet pipe. The end of the air outlet pipe is provided with an interface adapted to the air inlet of the desulfurization system. The air outlet pipe is provided with air volume regulating valve, check valve, safety pressure relief valve, flow meter, temperature sensor, pressure sensor, vibration sensor, gas analyzer and other pipeline accessories. Among them, the check valve can avoid the reverse flow of air after the fan is shut down due to pressure changes in the desulfurization system, thereby protecting the fan from damage; the safety pressure relief valve can automatically release the pressure in the pipeline when the fan or system is over-pressurized, thereby preventing the equipment from being damaged due to over-pressure. Although the structural design of the air outlet duct at the current desulfurization and oxidation fan outlet is relatively complete, the inventors discovered during actual work that if the airflow temperature or humidity in the desulfurization tower fluctuates significantly, or the fan's operating state is unstable, condensate may accumulate in the fan outlet duct. This can easily cause pipeline corrosion, equipment vibration and failure, reduce desulfurization efficiency, and pose safety risks, even causing system shutdown. In addition, the standby fan usually has a certain pressure in the duct before starting, so the standby fan often consumes a large current when switching to start, that is, the startup energy consumption is high. Therefore, the current structure of the desulfurization and oxidation fan outlet duct still needs to be improved to make it more in line with actual application needs. Utility Model Content

[0005] The present application provides an air outlet treatment device and a fan equipped with the device to solve the problem that the air outlet duct of a traditional desulfurization oxidation fan is prone to liquid accumulation and has high switching and starting energy consumption, making it difficult to meet actual application requirements.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] On the one hand, the present application provides an air outlet treatment device, including an air outlet duct, one end of the air outlet duct is provided with a connecting joint adapted to the air outlet of the desulfurization oxidation fan, and the other end of the air outlet duct is provided with an air outlet valve, which is used to realize the conduction and cutoff of the air outlet duct and the air inlet duct of the desulfurization system; a drain pipe is provided on the side of the air outlet duct facing the ground, and a drain valve is provided on the drain pipe; a one-way valve and an emptying pipe are also provided on the air outlet duct, and an emptying valve and a muffler are provided on the emptying pipe in sequence.

[0008] Furthermore, in the above technical solution, the air outlet duct includes a horizontal pipe section, a transition bend section and a vertical pipe section connected in sequence. The end of the horizontal pipe section away from the transition bend section is provided with a connecting joint adapted to the air outlet of the desulfurization oxidation fan, and the exhaust pipe, the one-way valve and the drain pipe are all provided on the horizontal pipe section; the air outlet valve is provided at the end of the vertical pipe section away from the transition bend section.

[0009] Furthermore, the outlet end of the vertical pipe section faces vertically upward, and the air outlet valve is a manual butterfly valve.

[0010] Furthermore, the drainage pipe is vertically arranged below the horizontal pipe section, and the drainage pipe is close to the connection between the horizontal pipe section and the transition curved section.

[0011] Furthermore, the exhaust pipe is vertically arranged above the horizontal pipe section, and the muffler is arranged at the outlet end of the exhaust pipe.

[0012] Furthermore, a one-way valve is provided between the drain pipe and the drain pipe.

[0013] On the other hand, the present application also provides a fan equipped with the above-mentioned air outlet treatment device, the fan is a desulfurization oxidation fan, and the air outlet of the fan is connected to the connecting joint at the end of the air outlet treatment device.

[0014] Compared with the prior art, this application has at least the following beneficial effects:

[0015] Based on further analysis and research of existing technical problems, the present application recognizes that the traditional desulfurization oxidation fan outlet duct is prone to liquid accumulation and has high switching startup energy consumption, which leads to many problems in its actual application. To this end, the present application provides an air outlet treatment device, which provides an air outlet valve at the air outlet of the air outlet duct so that the air inlet duct can be closed when the fan is not in operation for a long time or under maintenance. The condensate in the air outlet duct is discharged from the air outlet duct by providing a drain pipe on the air outlet duct, thereby preventing the condensate from entering the interior of the fan, avoiding pipeline corrosion and reducing safety risks. The present application also provides an air outlet treatment device, which provides an air outlet valve at the air outlet of the air outlet duct so that the air inlet duct can be closed when the fan is not in operation for a long time or under maintenance, and preventing the condensate from entering the interior of the fan, avoiding pipeline corrosion and reducing safety risks. An exhaust pipe is provided on the air outlet duct so that the exhaust valve can be opened to exhaust the internal pressure of the duct before the fan is switched on and started, thereby reducing the energy consumption of the fan starting. In addition, the present application also provides a one-way valve so that the air in the main duct will not flow back into the fan system before the fan is started. Therefore, the air outlet treatment device provided by the present application can not only solve the problem of condensate accumulation in the duct but also reduce the energy consumption of the fan switching start-up and avoid the backflow of air into the fan before the fan is started. Therefore, the application of the air outlet treatment device can solve the problems existing in the current fan in actual applications and meet the actual application needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing the present application; for example, based on the technical concepts and exemplary drawings disclosed in this application, those skilled in the art are able to easily make routine adjustments or further optimizations to the addition / reduction / attribution division, specific shapes, positional relationships, connection methods, and dimensional ratios of certain units (components).

[0017] Figure 1 This is a structural diagram of the installation connection between the air outlet processing device provided by the present application and the fan in one embodiment.

[0018] Description of reference numerals:

[0019] 1. Desulfurization and oxidation fan; 2. Fan air inlet; 3. Air outlet duct; 4. Air outlet valve; 5. Drain pipe; 6. Drain valve; 7. Check valve; 8. Drain pipe; 9. Drain valve; 10. Muffler. DETAILED DESCRIPTION

[0020] The present application will be further described below in detail through specific embodiments in conjunction with the accompanying drawings.

[0021] In the description of this application: unless otherwise specified, "plurality" means two or more. The terms "including," "comprising," "having," and the like in this application also mean "not limited to" (certain units, components, materials, steps, etc.).

[0022] Terms such as "upper," "lower," "left," "right," and "center" used in this application are generally intended to facilitate intuitive understanding when compared with the accompanying drawings and are not intended to be absolute limitations on positional relationships in actual products. Changes to these relative positional relationships are considered within the scope of this application without departing from the technical concepts disclosed herein.

[0023] Example 1

[0024] This embodiment provides an air outlet processing device, see Figure 1 It mainly includes an air outlet duct 3, one end of the air outlet duct 3 is provided with a connecting joint adapted to the air outlet of the desulfurization oxidation fan 1, and the other end of the air outlet duct 3 is provided with an air outlet valve 4, which is used to realize the conduction and cutoff of the air outlet duct 3 and the desulfurization system air inlet duct; a drain pipe 5 is provided on the side of the air outlet duct 3 facing the ground, and a drain valve 6 is provided on the drain pipe 5; the air outlet duct 3 is also provided with a one-way valve 7 and an emptying pipe 8, and the emptying pipe 8 is provided with an emptying valve 9 and a muffler 10 in sequence.

[0025] The air outlet treatment device provided in this embodiment addresses practical issues with conventional desulfurization and oxidation blowers by comprehensively optimizing the air outlet duct 3. This primarily addresses the following deficiencies: condensate accumulation in the air outlet duct, high energy consumption during fan startup, and backflow of air before the blower is started. The following is a detailed analysis of this technical solution.

[0026] (1) In a conventional desulfurization and oxidation fan system, condensate is easily formed in the air outlet duct due to changes in air flow temperature. Long-term accumulation of liquid will not only affect the ventilation efficiency of the duct, but also increase the corrosion risk of the fan system, thereby affecting the stability and safety of the system. In this application, a drain pipe 5 is provided on the side of the air outlet duct 3 facing the ground, and a drain valve 6 is installed on the drain pipe 5, so that the condensate in the air outlet duct 3 can be discharged smoothly, thereby avoiding the accumulation of condensate in the duct, thereby preventing problems such as duct corrosion and fan failure. Moreover, through the design of the drain pipe 5, the condensate no longer stays in the fan system, further reducing the safety risk and maintenance cost during system operation.

[0027] (2) During the switching and starting process of the fan, especially before the fan is started, the pressure in the air outlet duct 3 will cause an additional burden on the start-up of the fan, resulting in higher energy consumption. In addition, when not in use for a long time, the pressure of the fan system is not effectively managed, resulting in a higher energy input required for startup. For this reason, the present application sets an exhaust pipe 8 on the air outlet duct 3 and installs an exhaust valve 9 on the exhaust pipe 8, so that before the fan is started, the exhaust valve 9 can be opened to exhaust the gas pressure in the air outlet duct 3, thereby effectively reducing the pressure burden that needs to be overcome when the fan is started, and reducing the energy consumption of the fan startup; furthermore, the setting of the exhaust pipe 8 and the exhaust valve 9 ensures that the system is in a low pressure or normal pressure state before the fan is started, so that the fan can be started more easily, thereby improving the energy efficiency of the system.

[0028] (3) In a traditional fan system, when the fan is not started, the wind in the main duct is easy to flow back into the fan system, causing unnecessary airflow interference, affecting the stability of the system, and even causing internal damage to the fan. For this reason, the present application sets a one-way valve 7 on the air outlet duct 3, which can effectively prevent the wind in the air duct from flowing back into the fan system before the fan is started. The one-way valve 7 ensures that the airflow can only flow in one direction, that is, the airflow can enter the fan system only after the fan is started. When the fan is not started, the one-way valve 7 will automatically close to prevent the wind from flowing back. This design not only protects the fan from the influence of the backflow airflow, but also improves the safety and reliability of the system.

[0029] Therefore, the air outlet treatment device provided in this application can significantly improve the overall performance of the fan system, and successfully solve the problems of condensate accumulation, high switching and starting energy consumption, and air backflow in the traditional desulfurization and oxidation fan 1 system. The application of this air outlet treatment device not only improves the operating efficiency of the system, reduces energy consumption and maintenance costs, but also improves the safety and reliability of the fan.

[0030] The specific structural composition of the air outlet processing device provided in this embodiment is described in detail below.

[0031] In this embodiment, see Figure 1The above-mentioned air outlet duct 3 mainly includes a horizontal pipe section, a transition bend section and a vertical pipe section connected in sequence, and the outlet end of the vertical pipe section is vertically facing upward. The end of the horizontal pipe section away from the transition bend section is provided with a connecting joint adapted to the air outlet of the desulfurization oxidation blower 1, and the exhaust pipe 8, the one-way valve 7 and the drain pipe 5 are all provided on the horizontal pipe section. Among them, the air outlet valve 4 is provided at the end of the vertical pipe section away from the transition bend section. The air outlet valve 4 is preferably a manual butterfly valve, and of course other conventional pipeline valves such as manual ball valves and manual stop valves can also be used. The above-mentioned drain pipe 5 is vertically provided below the horizontal pipe section, and the drain pipe 5 is close to the connection between the horizontal pipe section and the transition bend section. The drain valve 6 on the drain pipe 5 is preferably a manual valve. The type of the manual valve is not limited and can be a conventional ball valve, butterfly valve, stop valve, etc. The above-mentioned emptying pipe 8 is vertically arranged above the horizontal pipe section, the muffler 10 is arranged at the outlet end of the emptying pipe 8, and the emptying valve 9 is arranged on the emptying pipe 8. The emptying valve 9 is preferably an electric valve; the above-mentioned one-way valve 7 is arranged between the emptying pipe 8 and the drain pipe 5.

[0032] This embodiment further improves the stability, energy efficiency, and maintenance convenience of the fan system by optimizing the pipeline layout, valve settings, and related components. The specific analysis is as follows:

[0033] (1) The present application divides the air outlet duct 3 into a horizontal pipe section, a transition bend section, and a vertical pipe section, which not only helps to smooth the transmission of the airflow, but also optimizes the discharge path of the condensate in different directions and heights. The vertical upward design of the outlet end of the vertical pipe section helps to reduce the sediment and condensate accumulation in the airflow, reduces the retention and backflow of condensate in the pipe, and prevents the fan efficiency from decreasing due to the accumulation of condensate. In addition, the design of the vertical pipe section helps to optimize the gravity distribution of the gas flow in the fan system and reduce the deposition effect of the airflow on the pipe wall. Furthermore, the setting of the transition bend section can smooth the airflow transition, avoid airflow instability or additional energy loss caused by sudden changes in direction in the fan and the pipe, and through the appropriate bending radius design, the pressure drop of the elbow can be reduced and the stability of the airflow can be improved.

[0034] (2) In the present application, the drain pipe 5 is arranged below the horizontal pipe section, near the connection between the horizontal pipe section and the transition bend section. This position design ensures that the condensate can flow to the drain pipe 5 by gravity, avoiding the condensate from staying in the pipe due to the uneven distribution of the horizontal airflow. The setting position of the drain pipe 5 optimizes the discharge efficiency of the condensate, avoids the accumulation of liquid in the pipe, thereby reducing the corrosion risk and maintaining the operating efficiency of the system; in addition, the manual valve used in the drain valve 6 of the present application can provide reliable and convenient control, simple operation and easy maintenance. When regular cleaning or inspection is required, the use of the manual valve ensures that the operator can directly control the discharge of the condensate to ensure that there is no liquid accumulation in the system.

[0035] (3) In the present application, the exhaust pipe 8 is vertically arranged above the horizontal pipe section. The position design ensures that the gas in the pipeline can be discharged smoothly through the exhaust pipe 8 and avoids the high pressure phenomenon when the fan is started. In addition, the exhaust pipe 8 is arranged at the top to reduce the accumulation of air through gravity, further reducing the burden of fan startup.

[0036] (4) The drain valve 9 in the present application is preferably an electric valve, so that the draining operation can be performed automatically, thereby improving the intelligent management level of the system. During the start and stop of the fan, the drain valve 9 can automatically open or close under the command of the control system to ensure stable operation of the system.

[0037] (5) The present application configures a muffler 10 on the emptying pipe 8 to reduce the noise generated during the emptying process and ensure low-noise operation of the system.

[0038] (6) In the present application, the one-way valve 7 is arranged between the emptying pipe 8 and the drain pipe 5, which can effectively prevent the airflow in the emptying pipe 8 from flowing back to the drain pipe 5. This design ensures the functional independence of the emptying pipe 8 and the drain pipe 5, and avoids unexpected problems caused by the backflow of airflow. In addition, the setting of the one-way valve 7 improves the safety and stability of the system, and prevents unnecessary backflow of airflow from affecting the normal operation of drainage and gas flow.

[0039] (7) In this application, the wind outlet valve 4 is set at the end of the vertical pipe section away from the transition bend section, ensuring that the airflow can be effectively cut off when the fan system is turned off to prevent the gas in the system from flowing back or leaking. This application selects a manual butterfly valve as the wind outlet valve 4, which not only has good sealing performance, but can also withstand high wind pressure and airflow, ensuring the sealing of the pipeline. For some operations that require manual control, the manual butterfly valve is simple and reliable to operate. Of course, manual ball valves or manual stop valves can also be selected as needed. These conventional pipeline valves have higher adaptability and flexibility and meet the needs of different application scenarios.

[0040] Example 2

[0041] Based on the air outlet treatment device provided in the first embodiment above, the present application further provides a desulfurization and oxidation fan equipped with the air outlet treatment device, wherein the air outlet of the desulfurization and oxidation fan is adaptively connected to a connecting joint at the end of the air outlet treatment device. The connecting joint may be a flange.

[0042] The fan equipped with the air outlet treatment device can improve the operating efficiency of the fan, reduce energy consumption, increase system reliability and safety, and simplify maintenance operations. Specifically, the optimized design of the drain pipe, emptying pipe, and emptying valve of the air outlet treatment device effectively reduces the energy loss in the system, reduces the pressure burden when the fan starts, and reduces energy consumption; the settings of the one-way valve and the air outlet valve can effectively prevent the influence of backflow and unstable airflow on the system, reducing the risk of system failure; the combination of manual valves and electric valves makes the pipeline system convenient for daily maintenance and can be automatically controlled when needed; the setting of the muffler also reduces the noise of the equipment operation, creating better conditions for the stability and use environment of the system; the condensate is effectively discharged through the drain pipe and the problem of liquid accumulation is avoided, which reduces the corrosion risk of the pipeline and the fan, extends the service life of the equipment, and reduces maintenance costs. Therefore, the air outlet treatment device provided in this application realizes fine valve setting, reasonable pipeline layout and effective condensate discharge through pipeline structure design, significantly improves the operating efficiency, safety and stability of the fan system, and is suitable for more efficient and economical desulfurization oxidation fan system applications.

[0043] The technical features of the above embodiments can be combined arbitrarily (as long as there is no contradiction in the combination of these technical features). In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described; these embodiments that are not explicitly written should also be considered to be within the scope of this specification.

[0044] The present application has been described in a relatively specific and detailed manner through general explanations and specific embodiments. It should be understood that, based on the technical concept of the present application, several conventional adjustments or further innovations may be made to these specific embodiments; however, as long as they do not depart from the technical concept of the present application, the technical solutions obtained by such conventional adjustments or further innovations also fall within the scope of protection of the claims of the present application.

Claims

1. An air outlet treatment device, characterized in that: It includes an air outlet duct, one end of which is provided with a connecting joint adapted to the air outlet of the desulfurization oxidation fan, and the other end of the air outlet duct is provided with an air outlet valve, and the air outlet valve is used to realize the conduction and cutoff of the air outlet duct and the desulfurization system air inlet duct; the side of the air outlet duct facing the ground is provided with a drain pipe, and the drain pipe is provided with a drain valve; the air outlet duct is also provided with a one-way valve and an emptying pipe, and the emptying pipe is provided with an emptying valve and a muffler in sequence.

2. The air outlet treatment device according to claim 1, characterized in that: The air outlet duct includes a horizontal pipe section, a transition bend section and a vertical pipe section connected in sequence. The end of the horizontal pipe section away from the transition bend section is provided with a connecting joint adapted to the air outlet of the desulfurization oxidation fan. The exhaust pipe, one-way valve and drain pipe are all provided on the horizontal pipe section; the air outlet valve is provided at the end of the vertical pipe section away from the transition bend section.

3. The air outlet treatment device according to claim 2, characterized in that: The outlet end of the vertical pipe section faces vertically upward, and the air outlet valve is a manual butterfly valve.

4. The air outlet treatment device according to claim 2, characterized in that: The drainage pipe is vertically arranged below the horizontal pipe section, and the drainage pipe is close to the connection between the horizontal pipe section and the transition curved section.

5. The air outlet treatment device according to claim 4, characterized in that: The exhaust pipe is vertically arranged above the horizontal pipe section, and the muffler is arranged at the outlet end of the exhaust pipe.

6. The air outlet treatment device according to claim 5, characterized in that: The one-way valve is arranged between the drain pipe and the drain pipe.

7. A fan equipped with the air outlet processing device according to any one of claims 1 to 6, characterized in that: The fan is a desulfurization and oxidation fan, and the air outlet of the fan is connected to the connecting joint at the end of the air outlet processing device.

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