Hydraulic telescopic on-line flushing device for double-pipe thermal mass flowmeter of incinerator

Abstract

The utility model belongs to chemical equipment technical field, concretely relates to incinerator double wind pipe thermal type mass flowmeter hydraulic telescopic on -line flushing device. Including combustion wind pipe line and combustion air pipe line respectively set flow control valve, thermal type mass flowmeter and coalescer in proper order, still include hydraulic drive mechanism, and hydraulic drive mechanism includes hydraulic oil tank, magnetic force pump and the hydraulic telescopic link fixed on combustion wind pipe line or combustion air pipe line pipe wall, the free end of hydraulic telescopic link is equipped with strong power flower shower head, and its waterway interface is connected to desalted water source through desalted water pipe line; The both ends of hydraulic telescopic link hydraulic cavity are connected to hydraulic oil tank through oil guide hose respectively, and are equipped with program -controlled solenoid valve group on oil guide hose; Still include control system. Through the automation operation of control system, realized the on -line flushing under the premise of thermal type mass flowmeter not to dismantle, reduced the labour intensity of worker, guaranteed the flushing effect, promoted the reliability and stability of device operation.

Description

Technical Field

[0001] This utility model belongs to the field of chemical equipment technology, specifically relating to a hydraulic telescopic online flushing device for a dual-duct thermal mass flow meter in an incinerator. Background Technology

[0002] In waste gas incinerators, combustion air serves to aid combustion and purge and cool the burner, and its volume needs to be monitored in real time. Thermal mass flow meters are widely used in combustion fan outlet pipelines due to their advantages such as direct measurement of mass flow rate, high accuracy, and fast response. However, these flow meters have high requirements for media cleanliness; the sensor probe is prone to scale buildup or the adhesion of ash, lint, etc., affecting measurement accuracy, thus requiring regular cleaning. Traditional cleaning methods require disassembling the flow meter, which not only increases the labor intensity of workers but also carries the risk of hot flue gas backflow into the furnace due to sudden fan shutdown. Therefore, for thermal mass flow meters on the dual air ducts (combustion air duct and combustion air duct) at the combustion fan outlet of positive pressure waste gas incinerators, there is an urgent need for a device that can achieve online flushing without manual disassembly to solve the above problems. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a hydraulic telescopic online flushing device for a dual-duct thermal mass flow meter in an incinerator. Through the automated operation of the control system, online flushing of the thermal mass flow meter is achieved without disassembly, which reduces the labor intensity of workers, ensures the flushing effect and the measurement accuracy of the thermal mass flow meter, and improves the reliability and stability of the device operation.

[0004] This utility model is achieved using the following technical solution:

[0005] The aforementioned incinerator dual-duct thermal mass flow meter hydraulic telescopic online flushing device includes a combustion fan, an inlet connected to a silencer, an air inlet connected to an air pipeline, and an outlet connected to a combustion air pipeline and a combustion air pipeline, respectively. A flow control valve, a thermal mass flow meter, and a coalescer are sequentially installed on the combustion air pipeline and the combustion air pipeline, respectively. The outlets of the combustion air pipeline and the combustion air pipeline are connected to the inner and outer rings of the burner, respectively. It also includes a hydraulic drive mechanism, comprising a hydraulic oil tank, a magnetic pump, and a hydraulic telescopic rod fixed to the wall of the combustion air pipeline or the combustion air pipeline. The free end of the hydraulic telescopic rod is equipped with a powerful dispersion nozzle, and its water interface is connected to a demineralized water source via a demineralized water pipeline. Both ends of the hydraulic chamber of the hydraulic telescopic rod are connected to the hydraulic oil tank via oil guide hoses, and the oil guide hoses are equipped with a programmable solenoid valve assembly. Finally, it includes a control system.

[0006] The hydraulic telescopic rods consist of four rods, which are respectively installed at the front and rear ends of each thermal mass flow meter. The hydraulic telescopic rods at the front and rear ends are axially symmetrically distributed with the thermal mass flow meter as the central axis, and the axis of the hydraulic telescopic rods forms an angle of 45 to 60° with the center line of the thermal mass flow meter.

[0007] The stroke of the hydraulic telescopic rod is set such that when fully extended, the spray end of the powerful spray nozzle is 5-10mm away from the side surface of the thermal mass flow meter sensor probe.

[0008] The programmable solenoid valve group includes four solenoid valves: the first solenoid valve connects the magnetic pump outlet to the upper chamber of the hydraulic chamber; the second solenoid valve connects the magnetic pump outlet to the lower chamber of the hydraulic chamber; the third solenoid valve connects the lower chamber of the hydraulic chamber to the hydraulic oil tank; and the fourth solenoid valve connects the upper chamber of the hydraulic chamber to the hydraulic oil tank.

[0009] The hydraulic telescopic rod is stored inside a sleeve on the outside of the combustion air duct or the combustion-supporting air duct wall.

[0010] The demineralized water pipeline is equipped with a demineralized water solenoid valve, which is electrically connected to the control system.

[0011] The flow control valve and the thermal mass flow meter are electrically connected to the control system, which has a built-in timing module.

[0012] The working principle of the hydraulic telescopic online flushing device for the dual-duct thermal mass flow meter of the incinerator is as follows:

[0013] The combustion blower continuously pressurizes and delivers air from the air pipeline to the dual-duct system. Flow control valves adjust the gas flow rates in the combustion air pipeline and the combustion air pipeline as needed. When the thermal mass flow meter reading falls below a set threshold due to probe fouling, the control system initiates a flushing procedure: First, the first solenoid valve and magnetic pump are opened, while the second, third, and fourth solenoid valves are closed. The magnetic pump then forces hydraulic oil through the first solenoid valve into the upper chamber of the hydraulic telescopic rod, pushing the rod to extend at a 45-60° angle, precisely positioning the nozzle against the sensor. The probe is positioned 5-10 mm to the side; subsequently, the demineralized water solenoid valve opens, and high-pressure demineralized water forms a diffused water mist that impacts the probe surface through the nozzle; after rinsing for 10 seconds, the demineralized water valve is closed, and the hydraulic circuit is switched (the first solenoid valve is closed, the second and third solenoid valves are opened, and the fourth solenoid valve is closed), and hydraulic oil is injected into the lower cavity of the telescopic rod to retract the sleeve; the wastewater mist generated during rinsing is captured by the downstream coalescer, which is equipped with a drain valve and a liquid level observation window at the bottom. The liquid level in the coalescer is monitored through the liquid level observation window and discharged periodically through the drain valve.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] The hydraulic telescopic online flushing device for the dual-duct thermal mass flow meter of this invention enables online flushing of the thermal mass flow meter without disassembly, eliminating the need for manual disassembly and greatly reducing the labor intensity of workers. It also eliminates the risks of high-temperature flue gas backflow that may occur during manual disassembly and cleaning. The symmetrical layout of the hydraulic telescopic rod, combined with a 45-60° angle design, ensures simultaneous coverage flushing of the front and rear ends of the thermal mass flow meter, guaranteeing effective flushing. The hydraulic telescopic rod can retract into the outer sleeve of the pipeline wall, avoiding the problem of eddy currents affecting measurement caused by fixed flushing rods obstructing the sensor. Simultaneously, the powerful spray nozzles are less prone to ash and lint adhesion after retraction, reducing the risk of nozzle clogging. Automated operation is achieved through a control system. Combined with signal feedback from the flow control valve and the thermal mass flow meter, the flushing program can be initiated promptly, ensuring accurate measurement of the thermal mass flow meter and improving the reliability and stability of the device's operation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the hydraulic telescopic online flushing device for the dual-duct thermal mass flow meter of the incinerator described in this utility model.

[0017] Figure 2 This is a schematic diagram of the hydraulic telescopic rod of this utility model when it is extended;

[0018] In the diagram: 1. Combustion fan; 2. Silencer; 3. Air pipeline; 4. Combustion air pipeline; 5. Combustion air pipeline; 6. Flow control valve; 7. Thermal mass flow meter; 8. Coalescer; 9. Burner; 10. Hydraulic oil tank; 11. Magnetic pump; 12. Hydraulic telescopic rod; 13. High-power dispersion nozzle; 14. Demineralized water pipeline; 15. Oil guide hose; 16. First solenoid valve; 17. Second solenoid valve; 18. Third solenoid valve; 19. Fourth solenoid valve; 20. Sleeve; 21. Demineralized water solenoid valve. Detailed Implementation

[0019] To make the objectives and technical solutions of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0020] Example 1

[0021] like Figure 1-2As shown, the incinerator dual-duct thermal mass flow meter hydraulic telescopic online flushing device includes a combustion fan 1. A silencer 2 is connected to the inlet of the combustion fan 1, and an air pipeline 3 is connected to the air inlet of the silencer 2. The outlet of the combustion fan 1 is connected to a combustion air pipeline 4 and a combustion air pipeline 5, respectively. A flow control valve 6, a thermal mass flow meter 7, and a coalescer 8 are sequentially installed on the combustion air pipeline 4 and the combustion air pipeline 5, respectively. The outlets of the combustion air pipeline 4 and the combustion air pipeline 5 are respectively connected to the inner ring of the burner 9 and the combustion chamber. The burner 9 has an outer ring; it also includes a hydraulic drive mechanism, which includes a hydraulic oil tank 10, a magnetic pump 11, and a hydraulic telescopic rod 12 fixed to the wall of the combustion air duct 4 or the combustion air duct 5. The free end of the hydraulic telescopic rod 12 is equipped with a powerful diffuser nozzle 13, and its water interface is connected to the demineralized water source through the demineralized water pipeline 14. The two ends of the hydraulic cavity of the hydraulic telescopic rod 12 are respectively connected to the hydraulic oil tank 10 through the oil guide hose 15, and the oil guide hose 15 is equipped with a programmable solenoid valve group; it also includes a control system.

[0022] The hydraulic telescopic rods 12 are four in number, respectively set at the front and rear ends of each thermal mass flow meter 7, and the hydraulic telescopic rods 12 at the front and rear ends are axially symmetrically distributed with the thermal mass flow meter 7 as the central axis, and the axis of the hydraulic telescopic rod 12 forms a 45° angle with the center line of the thermal mass flow meter 7.

[0023] The stroke of the hydraulic telescopic rod 12 is set such that when fully extended, the spray end of the powerful spray nozzle 13 is 10mm away from the side surface of the sensor probe of the thermal mass flow meter 7.

[0024] The programmable solenoid valve group includes four solenoid valves: the first solenoid valve 16 is connected to the outlet of the magnetic pump 11 and the upper chamber of the hydraulic chamber; the second solenoid valve 17 is connected to the outlet of the magnetic pump 11 and the lower chamber of the hydraulic chamber; the third solenoid valve 18 is connected to the lower chamber of the hydraulic chamber and the hydraulic oil tank 10; and the fourth solenoid valve 19 is connected to the upper chamber of the hydraulic chamber and the hydraulic oil tank 10.

[0025] The hydraulic telescopic rod 12 is stored in the sleeve 20 on the outside of the combustion air duct 4 or the combustion-supporting air duct 5.

[0026] The demineralized water pipeline 14 is equipped with a demineralized water solenoid valve 21, which is electrically connected to the control system.

[0027] The flow control valve 6 and the thermal mass flow meter 7 are electrically connected to the control system, which has a built-in timing module.

[0028] The specific steps for doing this are as follows:

[0029] Step 1: When the combustion blower 1 is running, the air pipeline 3 continuously supplies air to the combustion air pipeline 4 and the combustion air pipeline 5, and the flow control valve 6 adjusts the air volume according to the set value; the control system compares the reading of the thermal mass flow meter 7 with the threshold in real time, and if it is consistently low, it triggers flushing.

[0030] Step 2: Start the magnetic pump 11 and open the first solenoid valve 16. Hydraulic oil enters the upper cavity of the telescopic rod and pushes the nozzle out until the nozzle is 10mm away from the surface of the sensor probe.

[0031] Step 3: Open the demineralized water solenoid valve 21 to spray and disperse water mist at a pressure of 0.5MPa, and continue rinsing for 10 seconds;

[0032] Step 4: Close the demineralized water solenoid valve 21, switch to open the second and third solenoid valves, and inject hydraulic oil into the lower cavity of the telescopic rod to retract it to the outer sleeve 20 of the pipe wall;

[0033] Step 5: Turn off the magnetic pump 11 and open the fourth solenoid valve 19 to release the residual hydraulic oil in the upper chamber;

[0034] Step 6: After the flushing wastewater is coagulated by the coalescer 8, the liquid level in the coalescer 8 is monitored through the liquid level observation window, and it is discharged periodically through the drain valve.

Claims

1. A hydraulic telescopic online flushing device for a dual-duct thermal mass flow meter in an incinerator, characterized in that, The system includes a combustion blower (1), with a silencer (2) connected to the inlet of the combustion blower (1), an air line (3) connected to the air inlet of the silencer (2), and combustion air lines (4 and 5) connected to the outlet of the combustion blower (1). Flow control valves (6), thermal mass flow meters (7), and coalescers (8) are sequentially installed on the combustion air lines (4) and (5). The outlets of the combustion air lines (4) and (5) are connected to the inner ring and outer ring of the burner (9), respectively. The system also includes hydraulic systems. The driving mechanism, the hydraulic driving mechanism includes a hydraulic oil tank (10), a magnetic pump (11) and a hydraulic telescopic rod (12) fixed on the wall of the combustion air duct (4) or the combustion air duct (5). The free end of the hydraulic telescopic rod (12) is provided with a powerful spray nozzle (13), and its water interface is connected to the demineralized water source through the demineralized water pipeline (14). The two ends of the hydraulic cavity of the hydraulic telescopic rod (12) are respectively connected to the hydraulic oil tank (10) through the oil guide hose (15), and the oil guide hose (15) is provided with a programmable solenoid valve group; it also includes a control system.

2. The hydraulic telescopic online flushing device for a dual-duct thermal mass flow meter in an incinerator according to claim 1, characterized in that, The number of hydraulic telescopic rods (12) is four, which are respectively set at the front and rear ends of each thermal mass flow meter (7). The hydraulic telescopic rods (12) at the front and rear ends are axially symmetrically distributed with the thermal mass flow meter (7) as the central axis. The axis of the hydraulic telescopic rod (12) forms an angle of 45 to 60° with the center line of the thermal mass flow meter (7).

3. The hydraulic telescopic online flushing device for a dual-duct thermal mass flow meter in an incinerator according to claim 2, characterized in that, The stroke of the hydraulic telescopic rod (12) is set such that when fully extended, the spray end of the powerful spray nozzle (13) is 5-10 mm away from the side surface of the sensor probe of the thermal mass flow meter (7).

4. The hydraulic telescopic online flushing device for a dual-duct thermal mass flow meter in an incinerator according to claim 1, characterized in that, The programmable solenoid valve group includes four solenoid valves: the first solenoid valve (16) is connected to the outlet of the magnetic pump (11) and the upper chamber of the hydraulic chamber; the second solenoid valve (17) is connected to the outlet of the magnetic pump (11) and the lower chamber of the hydraulic chamber; the third solenoid valve (18) is connected to the lower chamber of the hydraulic chamber and the hydraulic oil tank (10); and the fourth solenoid valve (19) is connected to the upper chamber of the hydraulic chamber and the hydraulic oil tank (10).

5. The hydraulic telescopic online flushing device for a dual-duct thermal mass flow meter in an incinerator according to claim 1, characterized in that, The hydraulic telescopic rod (12) is stored in the sleeve (20) on the outside of the combustion air duct (4) or the combustion air duct (5).

6. The hydraulic telescopic online flushing device for a dual-duct thermal mass flow meter in an incinerator according to claim 1, characterized in that, The demineralized water pipeline (14) is equipped with a demineralized water solenoid valve (21), which is electrically connected to the control system.

7. The hydraulic telescopic online flushing device for a dual-duct thermal mass flow meter in an incinerator according to claim 1, characterized in that, The flow control valve (6) and the thermal mass flow meter (7) are electrically connected to the control system, which has a built-in timing module.

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