A high temperature switching device for sampling flow paths of multiple organic pollutants in incineration flue gas

Abstract

The present invention relates to high-temperature gas sampling technology, and aims to provide a high-temperature switching device for sampling flow paths of various organic pollutants in incineration flue gas. It includes at least two high-temperature resistant ball valves, one end of which is connected to a sampling port provided in the flue, and the other end is connected to a gas analyzer; at least two motors; the output end of the motor is connected to the valve stem of the high-temperature resistant ball valve through a coupling; the interior of the device housing includes an insulation cavity equipped with a high-temperature resistant ball valve and a heating device, and a non-insulation cavity equipped with a motor and a motor control module. The present invention has a simple structure and a concise layout; placing the heating device, temperature sensor and high-temperature resistant ball valve in the insulation cavity can achieve constant temperature heating of the ball valve, effectively solving the problem caused by uneven heating; at the same time, it reduces heat dissipation and energy consumption. Placing the motor and the motor control module in the non-insulation cavity can achieve switch control of the high-temperature resistant ball valve while ensuring that the motor is not affected by high temperature, and then automatically switch as needed.

Description

Technical Field

[0001] The invention relates to a high-temperature gas sampling technology, and in particular to a high-temperature switching device for sampling flow paths of various organic pollutants in incineration flue gas. Background Art

[0002] Incineration is the main method of solid waste and garbage disposal, and the organic pollutants (benzene, naphthalene, chlorobenzene and dioxins, etc.) generated by solid waste incineration have attracted much attention. Based on the above needs, the inventor team has proposed a technology for simultaneous online detection of multiple organic pollutants in incineration flue gas. By exploring the emission process characteristics of inorganic pollutants and trace organic pollutants such as benzene, naphthalene, chlorobenzene and dioxins in flue gas, the influence of factors such as temperature, humidity, flow rate and pressure are analyzed; high-efficiency continuous lossless sampling and transmission, time-free blind spot concentration and release, high-efficiency separation, high-selectivity, rapid and accurate qualitative and quantitative detection are adopted to achieve rapid and accurate detection of trace organic pollutants such as benzene, naphthalene, chlorobenzene and dioxins in incineration flue gas. An adaptive optimization intelligent control system for multiple organic pollutants is constructed, forming an integration of "source conditioning, process control, online detection and intelligent feedback control".

[0003] In order to achieve efficient and continuous lossless sampling and transmission, a high-temperature switching valve is required in the sampling flow path to switch as needed, and the flow path temperature must not be lower than 180°C. However, the high-temperature switching valves currently used in the market have the following defects: they are usually single-body valves; they need to be heated by winding heating wires; and they need to be manually switched. Single-body valves have scattered valve body layouts; heating wire heating has uneven heating winding, which is easy to form condensation points and affect detection accuracy; manual switching valves cannot meet the needs of continuous operation of the equipment. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide a high-temperature switching device for sampling flow paths of various organic pollutants in incineration flue gas.

[0005] To solve the technical problem, the solution of the present invention is:

[0006] Provided is a high-temperature switching device for sampling flow paths of multiple organic pollutants in incineration flue gas, comprising: at least two high-temperature resistant ball valves, one end of which is connected to a sampling port arranged in a flue through a sampling tube, and the other end is connected to a gas analyzer through a pipeline; at least two motors are connected to a motor control module through cables; the output end of the motor is connected to the valve stem of the high-temperature resistant ball valve through a coupling; a device shell, the interior of which is divided into two cavities; one of which is a heat-insulating cavity, which is equipped with a high-temperature resistant ball valve and a heating device; the other is a non-heat-insulating cavity, which is equipped with a motor and a motor control module.

[0007] As a preferred solution of the present invention, a ceramic fiber blanket is laid on the periphery and bottom plate of the heat preservation cavity.

[0008] As a preferred embodiment of the present invention, the heating device is a mica heating plate set, the main component of which is a mica heating plate; the mica heating plate is connected to a heating control module and a power supply in sequence through cables, and the heating control module and the power supply are arranged outside the insulation cavity.

[0009] As a preferred embodiment of the present invention, the device shell is composed of a top plate, an insulation box body, a middle frame, a support seat and a bottom plate; the insulation box body is open and the bottom is supported by the support seat, and the two are embedded in the middle frame; the top plate and the insulation box body are enclosed to form an insulation cavity, and the bottom of the insulation box body, the support seat and the bottom plate are enclosed to form a non-insulation cavity.

[0010] As a preferred solution of the present invention, a temperature sensor is installed in the heat preservation cavity, and the temperature sensor is connected to the constant temperature controller through a cable.

[0011] As a preferred solution of the present invention, the thermostatic controller is installed in a non-insulated cavity, or is placed outside the device housing.

[0012] As a preferred solution of the present invention, the high temperature resistant ball valve and the motor are respectively fixed on the bracket.

[0013] As a preferred embodiment of the present invention, the bracket includes a ball valve bracket, a long strip bracket and a motor bracket; the ball valve bracket and the long strip bracket are located in the heat-insulating cavity, and the motor bracket is located in the non-heat-insulating cavity; wherein the ball valve bracket is in a "J" shape and is fixed on the upper surface of the long strip bracket; the high-temperature resistant ball valve is mounted on the ball valve bracket, and its valve stem passes through the ball valve bracket and is connected to the first coupling; the motor is mounted on the lower surface of the motor bracket, and the output shaft of the motor passes through the motor bracket and is connected to the second coupling; the first coupling is connected to the second coupling.

[0014] As a preferred embodiment of the present invention, the two ends of the long strip bracket have right-angled edges; the motor bracket is in the shape of a "J", and the two ends have right-angled edges to form a groove shape; two strip openings are relatively provided at the bottom edges on both sides of the insulation cavity, and an L-shaped bracket connector is embedded in each strip opening; the right-angled edges at both ends of the long strip bracket are against the vertical straight edges of the two bracket connectors, and the horizontal straight edges of the two bracket connectors are respectively embedded in the groove shapes at both ends of the motor bracket.

[0015] As a preferred solution of the present invention, the device shell is formed by bending a stainless steel plate; the upper edge of the middle frame and the lower edge of the support seat are respectively provided with card slots, and the top plate and the bottom plate are respectively inserted into the corresponding card slots to achieve the closure of the cavity.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention has a simple structure and a concise layout;

[0018] 2. Placing the heating device, temperature sensor and high temperature resistant ball valve together in the heat preservation cavity can achieve constant temperature heating of the ball valve, effectively solving the problem caused by uneven heating in the prior art; at the same time, it can also reduce heat dissipation and energy consumption.

[0019] 3. Placing the motor and motor control module in a non-insulated cavity can realize the switch control of the high-temperature resistant ball valve while ensuring that the motor is not affected by high temperature, thereby realizing the automatic switching of the sampling flow path of various organic pollutants (benzene, naphthalene, chlorobenzene and dioxins, etc.) in the incineration flue gas on demand. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an exploded view of the high temperature switching device of the present invention.

[0021] In the figure: 1 top plate; 2 mica heating plate; 3 insulation box body; 4 middle frame; 5 support seat; 6 bracket connector; 7 high temperature resistant ball valve; 8 ball valve bracket; 9 first coupling; 10 long bracket; 11 second coupling; 12 motor bracket; 13 motor; 14 cable; 15 motor control module. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0023] The serial numbers assigned to the components in this application, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of this application, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0024] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0025] like Figure 1 The high temperature switching device for sampling flow paths of various organic pollutants in incineration flue gas shown includes:

[0026] Two high temperature resistant ball valves 7, one end of which is connected to the sampling port in the flue through a sampling tube, and the other end is connected to the gas analyzer through a pipeline; the sampling port can be set at different positions of the flue according to the needs of the detection design. Two motors 13 are connected to the motor control module 15 through cables 14; the output end of the motor 13 is connected to the valve stem of the high temperature resistant ball valve 7 through a coupling;

[0027] The device shell is divided into two cavities, one of which is a heat-insulating cavity and the other is a non-heat-insulating cavity. The device shell is composed of a top plate 1, a heat-insulating box body 3, a middle frame 4, a support seat 5 and a bottom plate; the heat-insulating box body 3 is open and the bottom is supported by the support seat 5, and the two are embedded in the middle frame 4; the top plate 1 and the heat-insulating box body 3 enclose a heat-insulating cavity, and the bottom of the heat-insulating box body 3, the support seat 5 and the bottom plate enclose a non-heat-insulating cavity. The device shell is formed by bending a stainless steel plate; the upper edge of the middle frame 4 and the lower edge of the support seat 5 are respectively provided with slots, and the top plate 1 and the bottom plate are respectively inserted into the corresponding slots to achieve the closure of the cavity.

[0028] Ceramic fiber blankets are laid around the insulation cavity and on the bottom plate, and high temperature resistant ball valve 7, temperature sensor and heating device are installed in the insulation cavity. The main part of the heating device can be selected as mica heating plate 2, which is connected to the heating control module and the power supply in turn through cables, and the temperature sensor is connected to the thermostat through cables. The heating control module, power supply and thermostat are arranged outside the insulation cavity. In order to make the device structure and wiring scheme simpler, in this embodiment, the heating control module, thermostat, motor 13 and motor control module 15 are installed together in the non-insulation cavity.

[0029] In order to facilitate installation, the bracket installation in this example adopts easily disassembled components. The required brackets include a ball valve bracket 8, a strip bracket 10 and a motor bracket 12; the ball valve bracket 8 and the strip bracket 10 are located in the heat preservation cavity, and the motor bracket 12 is located in the non-heat preservation cavity; the two ends of the strip bracket 10 have right-angled edges; the motor bracket 12 is in the shape of a "F", and its two ends have right-angled edges to form a groove shape; two strip openings are arranged at the bottom edges of the two sides of the heat preservation cavity, and an L-shaped bracket connector 6 is embedded in each strip opening; the right-angled edges at both ends of the strip bracket 10 are against the vertical straight edges of the two bracket connectors 6, and the horizontal straight edges of the two bracket connectors 6 are respectively embedded in the groove shape at both ends of the motor bracket 12. Due to the specific position of the two strip openings, the vertical straight edges of the two bracket connectors 6 are squeezed by the strip bracket 10 on the side wall of the heat preservation box body 3, thereby realizing a stable installation between the three brackets. This installation method does not require screws, and only needs to be pressed when in use, which is very convenient.

[0030] As shown in the figure, the ball valve bracket 8 is in a "J" shape and is fixed on the upper surface of the long bracket 10; the high temperature resistant ball valve 7 is installed on the ball valve bracket 8, and its valve stem passes through the ball valve bracket 8 and is connected to the first coupling 9; the motor 13 is installed on the lower surface of the motor bracket 12, and the output shaft of the motor 13 passes through the motor bracket 12 and is connected to the second coupling 11; the first coupling 9 is connected to the second coupling 11.

[0031] Example of the working process of the present invention:

[0032] First, by energizing the mica heating sheet 2 and sensing the temperature with the temperature sensor, the thermostat controls the temperature at 180°C ± 1°C, so that the inside of the insulation cavity is evenly heated to avoid the appearance of condensation points. After heating is completed, the motor control module 15 gives the set positive and negative 12V DC pulses, outputs positive 12V, and makes the high-temperature resistant ball valve 7 rotate clockwise, and the sampling flow path is opened; when the negative 12V is output, the high-temperature resistant ball valve 7 rotates counterclockwise, and the sampling flow path is closed.

[0033] Selection of main components and more detailed description:

[0034] The mica heating sheet set is made of Xinheng Hardware Plastic HP5 silver mica board. The mica heating sheet 2 is fully covered in the insulation box 3, and is equipped with a thermostat 16 and a thermocouple 17 to accurately and evenly control the temperature to avoid the generation of condensation points.

[0035] The high temperature resistant ball valve 7 uses 1 / 4 external thread of Hangzhou Changcheng Electromechanical High Hardware, and its inner wall surface is plated with an inert coating to prevent organic pollutants from remaining in the valve body. The high temperature resistant ball valve can continue to operate smoothly in the high temperature environment of the insulation cavity.

[0036] The motor 13 uses a Santuo GW4058E i539 DC worm gear reduction motor, which is operated by a DC 12V power supply, and runs clockwise when it is connected to a positive 12V power supply, and runs counterclockwise when it is connected to a negative 12V power supply. The drive control module 15 is provided with a time control module and a voltage control module, and controls the motor 12 to run clockwise or counterclockwise through the conversion of time and voltage.

[0037] The motor control module and the thermostat can also be placed outside the device housing. The bottom plate of the device housing can be opened movably for monitoring at any time. The thermostat uses AI7048E7 from Xiamen Yudian Automation Technology Co., Ltd., which has a display screen and a temperature adjustment knob.

[0038] The device shell is made of 3mm stainless steel plate, and a 10mm ceramic fiber blanket is laid inside the insulation box body 3 for heat preservation.

[0039] The two couplings adopt cross slider coupling.

[0040] As described in the implementation, the device can also be modified and improved without departing from the principle. It should be pointed out that all technical solutions obtained by equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A high temperature switching device for sampling flow paths of multiple organic pollutants in incineration flue gas, characterized in that: include: At least two high temperature resistant ball valves, one end of which is connected to a sampling port provided in the flue through a sampling tube, and the other end is connected to a gas analyzer through a pipeline; At least two motors are connected to the motor control module through cables; the output end of the motor is connected to the valve stem of the high temperature resistant ball valve through a coupling; The device housing has an interior divided into two chambers; One of them is a heat-insulating cavity, equipped with a high-temperature resistant ball valve and a heating device; the other is a non-heat-insulating cavity, equipped with a motor and a motor control module; a temperature sensor is installed in the heat-insulating cavity, and the temperature sensor is connected to a constant temperature controller through a cable; the constant temperature controller is installed in the non-heat-insulating cavity, or placed outside the device housing; The high temperature resistant ball valve and the motor are fixed on the bracket respectively; the bracket includes a ball valve bracket, a strip bracket and a motor bracket; the ball valve bracket and the strip bracket are located in the heat preservation cavity, and the motor bracket is located in the non-heat preservation cavity; wherein the ball valve bracket is in the shape of a "J" and is fixed on the upper surface of the strip bracket; The high-temperature resistant ball valve is installed on the ball valve bracket, and its valve stem is connected to the first coupling after passing through the ball valve bracket; the motor is installed on the lower surface of the motor bracket, and the output shaft of the motor is connected to the second coupling after passing through the motor bracket; the first coupling is connected to the second coupling; the two ends of the long bracket have right-angled edges; the motor bracket is in the shape of a "J", and the two ends have right-angled edges to form a groove shape; two strip openings are oppositely provided at the bottom edges of both sides of the insulation cavity, and an L-shaped bracket connector is embedded in each strip opening; the right-angled edges at both ends of the long bracket are against the vertical straight edges of the two bracket connectors, and the horizontal straight edges of the two bracket connectors are respectively embedded in the groove shapes at both ends of the motor bracket.

2. The high temperature switching device according to claim 1, characterized in that: Ceramic fiber blankets are laid around the thermal insulation cavity and on the bottom plate.

3. The high temperature switching device according to claim 1, characterized in that: The heating device is a mica heating sheet set, the main component of which is a mica heating sheet; the mica heating sheet is connected to a heating control module and a power supply in sequence through cables, and the heating control module and the power supply are arranged outside the heat preservation cavity.

4. The high temperature switching device according to claim 1, characterized in that: The device shell consists of a top plate, an insulation box body, a middle frame, a support seat and a bottom plate; the insulation box body is open and the bottom is supported by the support seat, and the two are embedded in the middle frame; the top plate and the insulation box body are enclosed to form an insulation cavity, and the bottom of the insulation box body, the support seat and the bottom plate are enclosed to form a non-insulation cavity.

5. The high temperature switching device according to any one of claims 1 to 4, characterized in that: The device shell is formed by bending a stainless steel plate; the upper edge of the middle frame and the lower edge of the support seat are respectively provided with card slots, and the top plate and the bottom plate are respectively inserted into the corresponding card slots to achieve the closure of the cavity.

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