Integrated methanol fuel engine waste gas monitoring device

Abstract

The utility model discloses an integrated methanol fuel engine waste gas monitoring device, and belongs to the technical field of environment control. The device comprises a cabinet, an analysis and control unit, a flowmeter, a filter, an electromagnetic valve, a heat tracing pipeline joint, a heating box temperature controller, a heat tracing pipe temperature controller, a heating box and a condenser, a rectangular box body is arranged at the bottom of the whole cabinet, four stand columns are vertically and fixedly connected to the surface of the box body, the top ends of the stand columns are connected with a top cover, and a heat tracing pipeline connector is arranged on the top cover; the analysis and control unit is installed below the top cover, and a flow meter, a heating box temperature controller and a heat tracing pipe temperature controller are installed on a panel below the analysis and control unit; the heating box is arranged in the middle of the cabinet, the flowmeter and the filter are arranged on the inner side of a left panel of the cabinet, and the condenser is fixedly connected to the upper surface of the box body. According to the utility model, a plurality of hardware for monitoring the waste gas are integrated into a whole through the cabinet, so that the online and automatic measurement of the concentration of methanol and formaldehyde in the waste gas is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to environmental control technical field, concretely relates to a kind of integrated design methanol fuel engine exhaust monitoring device. BACKGROUND

[0002] As a kind of clean fuel, methanol fuel engine technology has been greatly valued and achieved certain degree of development and application under the background of double carbon. In the combustion of methanol, influenced by factors such as combustion temperature, load change and engine speed, unburned methanol and formaldehyde will be produced in the combustion exhaust. Therefore, from the perspective of environmental protection, energy efficiency improvement, it is necessary to monitor the exhaust components of methanol fuel engine.

[0003] In order to realize the real-time qualitative and quantitative analysis of methanol and formaldehyde concentration in exhaust gas, the technical personnel designed a set of methanol fuel engine exhaust online monitoring system. The system directly inserts high-temperature sampling probe into the pipeline to collect high-temperature exhaust gas after engine combustion, and adjusts the temperature, flow and pressure of exhaust gas through gas pretreatment. Finally, the concentration of methanol and formaldehyde in exhaust gas is measured online and automatically through optical analysis method.

[0004] Since the system includes analysis and control unit, filter, heating box and condenser and many other hardware devices, and also needs the help of gas storage tank and air compressor to realize the calibration and purging function of the system, how to integrate the above hardware devices into one and realize the system function in a modular way is a problem to be solved at present. UTILITY MODEL CONTENT

[0005] Therefore, the utility model provides an integrated methanol fuel engine exhaust monitoring device, which integrates the filter, heating box, condenser, analysis and control unit for exhaust gas monitoring into one through cabinet, which is conducive to online and automatic measurement of the concentration of methanol and formaldehyde in exhaust gas.

[0006] An integrated methanol fuel engine exhaust monitoring device, comprising a cabinet, an analysis and control unit, a flow meter, a filter, a solenoid valve, a heat tracing pipe joint, a heating box temperature controller, a heat tracing pipe temperature controller, a heating box and a condenser.

[0007] The cabinet as a whole adopts a cuboid shape, and a rectangular box is arranged at the bottom. Four vertical columns are fixedly connected to the surface of the box perpendicularly, and are distributed at the four top corners of the box. The top ends of the vertical columns are connected to a top cover, and the heat tracing pipe joint is arranged on the top cover. The analysis and control unit is installed below the top cover. The flow meter, heating box temperature controller and heat tracing pipe temperature controller are installed on the panel below the analysis and control unit. The heating box is arranged in the middle of the cabinet. The flow meter and filter are arranged inside the left panel of the cabinet. The condenser is fixedly connected to the upper surface of the box.

[0008] Further, the heating box is internally provided with a high-temperature gas chamber, and the high-temperature gas chamber is connected with the analysis and control unit through an optical fiber.

[0009] Further, the heating pipeline joint is externally connected with a sampling probe, the sampling probe is connected with the inlet of the high-temperature gas chamber in the heating box through an electric heating pipeline, the outlet of the high-temperature gas chamber is connected with the inlet of the condenser outside the heating box through an electric heating pipeline, and the outlet of the condenser is connected with the flow meter through an electric heating pipeline.

[0010] Further, the heating box temperature controller and the heating pipeline temperature controller are used for controlling the temperature of the heating box and the heating pipeline, respectively.

[0011] Further, the analysis and control unit comprises a formaldehyde analysis unit, a methanol analysis unit and an optical fiber, the formaldehyde analysis unit is connected with the high-temperature gas chamber through the optical fiber, and the methanol analysis unit is connected between the condenser and the flow meter.

[0012] Beneficial effects:

[0013] 1. The spatial layout of the analysis and control unit, the flow meter, the filter, the electromagnetic valve, the heating box temperature controller, the heating pipeline temperature controller, the heating box and the condenser in the cabinet is reasonably designed, so that the above-mentioned hardware forms four functional modules of a gas pretreatment module, a measurement and analysis module, a calibration control module and a data management module, when monitoring, only the high-temperature sampling probe in the gas pretreatment module needs to be installed to the exhaust pipe through a flange, and the waste gas monitoring device can automatically realize sampling, transmission, analysis and result display.

[0014] 2. The waste gas monitoring system as a whole comprehensively adopts an optical detection method, and has the characteristics of high measurement accuracy, good reliability and convenient maintenance through modular design, and is suitable for the scene of online detection of waste gas components of a methanol engine.

[0015] 3. The utility model adopts ultraviolet difference and non-dispersive infrared two kinds of optical methods to realize concentration detection of formaldehyde and methanol respectively; in order to guarantee equipment performance, a calibration control system is integrated for facilitating equipment calibration, and system calibration can be realized manually or automatically. DETAILED DESCRIPTION

[0016] Figure 1 It is a structural composition schematic view of the integrated methanol fuel engine waste gas monitoring device.

[0017] Figure 2 It is a working principle schematic view of the integrated methanol fuel engine waste gas monitoring device.

[0018] Wherein, 1-cabinet, 2-analysis and control unit, 3-flow meter, 4-filter, 5-solenoid valve, 6-heat tracing line joint, 7-heating box temperature controller, 8-heat tracing pipe temperature controller, 9-heating box, 10-condenser. DETAILED DESCRIPTION

[0019] The utility model is described in detail below with examples and drawings.

[0020] As shown in the accompanying Figure 1 The utility model provides a kind of integrated methanol fuel engine exhaust monitoring device, including the analysis and control unit 2, flow meter 3, filter 4, solenoid valve 5, heat tracing line joint 6, heating box temperature controller 7, heat tracing pipe temperature controller 8, heating box 9 and condenser 10 in the internal layout of cabinet 1.

[0021] Wherein, cabinet 1 is the installation main body of entire monitoring device, cabinet 1 adopts cuboid shape as a whole, bottom is equipped with a rectangular box, the surface of box is vertically fixedly connected four columns, four columns are distributed at four top corners of box, the top end of column is connected top cover, heat tracing line joint 6 is set on top cover, and heat tracing line joint 6 is used to external sampling probe.Heat tracing line joint 6 is used to external sampling probe.The analysis and control unit 2 is installed below top cover, flow meter 3, heating box temperature controller 7 and heat tracing pipe temperature controller 8 are installed on the panel below analysis and control unit 2;Heating box 9 is set in the middle part of cabinet, and flow meter 3 and filter 4 are arranged in the left panel inside of cabinet 1, and condenser 10 is fixedly connected on the upper surface of box.

[0022] Integrated methanol fuel engine exhaust monitoring device is divided into four parts of gas pretreatment module, measurement analysis module, calibration control module and data management module from function.

[0023] As shown in the accompanying Figure 2 Gas pretreatment module includes sampling probe, heat tracing line, heating box, high-temperature gas chamber, condenser, humidity module and air pump;Sampling probe is connected with the inlet of high-temperature gas chamber in heating box through electric heat tracing line, the outlet of high-temperature gas chamber is connected with the inlet of condenser outside heating box through electric heat tracing line, the outlet of condenser is connected with air pump through heat tracing line, and humidity module is installed on the electric heat tracing line between high-temperature gas chamber and condenser.

[0024] Measurement analysis module includes formaldehyde analysis unit, methanol analysis unit and optical fiber;Formaldehyde analysis unit is connected to high-temperature gas chamber through optical fiber, and methanol analysis unit is connected between condenser and air pump.

[0025] The calibration control module comprises solenoid valves F1, F2, F3, F4, a pneumatic valve and a flow meter, the peripheral equipment is an air compressor and a gas storage tank, the air compressor is connected to the gas storage tank, the gas storage tank has two outlets, the first outlet is connected to the sampling probe through a pipeline, the pipeline is connected to the solenoid valve F4, the second outlet is connected to the pipeline between the high-temperature gas chamber and the sampling probe through a pipeline, the connecting position is provided with the pneumatic valve, the pipeline between the pneumatic valve and the gas storage tank is connected to the solenoid valve F3, and the pipeline between the pneumatic valve and the sampling probe is connected to a filter; the pipeline between the pneumatic valve and the high-temperature gas chamber is connected to two pipelines in parallel, the solenoid valves F1 and F2 are arranged on the two pipelines respectively, the solenoid valve F1 functions as zero adjustment, and the solenoid valve F2 functions as calibration; and the flow meter is arranged on the pipeline between the methanol analysis unit and the air pump.

[0026] The utility model has three working modes of measurement, purging and calibration, and the specific working modes are as follows:

[0027] Measurement mode: when the system is in normal measurement state, the exhaust gas is sampled by the sampling probe and is transmitted to the heating box through the heat tracing pipeline, the sample gas in the heating box enters the high-temperature gas chamber through the filter and the pneumatic valve, the formaldehyde analysis unit outside the heating box detects the sample gas in the high-temperature gas chamber through the optical fiber, and the formaldehyde concentration is measured by the high-temperature ultraviolet differential method; after passing through the high-temperature gas chamber, the sample gas passes through the humidity module and the condenser, is rapidly condensed, dried and enters the methanol analysis unit, the methanol concentration is detected by the non-dispersive infrared method, and after detection, the sample gas is exhausted by the flow meter and the sampling pump.

[0028] Purging mode: in the purging mode, the sampling probe and the analyzer are purged by clean compressed air. One way of clean air passes through the solenoid valve F4, reaches the sampling probe through the electric heat tracing pipeline and realizes purging; the other way of clean air passes through the solenoid valve F3 and the pneumatic valve and purges and cleans the high-temperature gas chamber, the humidity module, the condenser, the methanol analysis unit and the flow meter in turn.

[0029] Calibration mode: the system supports automatic or manual zero adjustment and calibration functions. The system is connected to the standard gas cylinder (zero gas or range gas) outside, enters the formaldehyde analysis unit and the methanol analysis unit in turn through the control solenoid valve F1 (zero gas) or the solenoid valve F2 (range gas), and realizes system calibration by cooperating with the calibration function of the upper computer.

[0030] In conclusion, the above is only a preferred embodiment of the utility model, and is not used to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An integrated methanol fuel engine exhaust monitoring device, characterized by, The cabinet, the analysis and control unit, the flow meter, the filter, the electromagnetic valve, the heat tracing pipeline joint, the heating box temperature controller, the heat tracing pipe temperature controller, the heating box and the condenser are included. The cabinet has a cuboid shape, and a rectangular box body is arranged at the bottom. Four vertical columns are fixedly connected to the surface of the box body and are arranged at the four corners of the box body. The top ends of the vertical columns are connected to a top cover, and the heat tracing pipeline joint is arranged on the top cover. The analysis and control unit is installed below the top cover. The flow meter, the heating box temperature controller and the heat tracing pipe temperature controller are installed on the panel below the analysis and control unit. The heating box is arranged in the middle of the cabinet. The flow meter and the filter are arranged in the left panel of the cabinet. The condenser is fixedly connected to the upper surface of the box body.

2. The integrated methanol fuel engine exhaust monitoring apparatus of claim 1, wherein, The heating box is internally provided with a high-temperature gas chamber, and the high-temperature gas chamber is connected to the analysis and control unit through an optical fiber.

3. The integrated methanol fuel engine exhaust monitoring apparatus of claim 2, wherein, The heat tracing pipeline joint is externally connected to a sampling probe through a heat tracing pipeline. The sampling probe is connected to the inlet of the high-temperature gas chamber in the heating box through an electric heat tracing pipeline. The outlet of the high-temperature gas chamber is connected to the inlet of the condenser outside the heating box through an electric heat tracing pipeline. The outlet of the condenser is connected to the flow meter through an electric heat tracing pipeline.

4. The integrated methanol fuel engine exhaust monitoring apparatus of claim 3, wherein, The heating box temperature controller and the heat tracing pipe temperature controller are respectively used for controlling the temperature of the heating box and the heat tracing pipeline.

5. The integrated methanol fuel engine exhaust monitoring apparatus according to claim 3 or 4, wherein The analysis and control unit comprises a formaldehyde analysis unit, a methanol analysis unit and an optical fiber. The formaldehyde analysis unit is connected to the high-temperature gas chamber through the optical fiber. The methanol analysis unit is connected between the condenser and the flow meter.

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