Tubular heating self-temperature-limiting high-temperature CEMS (Continuous Emission Monitoring System) sampling probe

Abstract

The utility model belongs to the technical field of flue gas emission detection, and particularly relates to a tube-type heating self-temperature-limiting high-temperature CEMS sampling probe, in particular to a tube-type heating self-temperature-limiting high-temperature CEMS sampling probe, which comprises a cavity and a tube-type heater, a smoke inlet is formed in one end of the probe cavity, the outer end of the smoke inlet is communicated with a smoke pipeline, a filter element assembly is arranged in the probe cavity, one side of the filter element assembly is communicated with a smoke outlet formed in the probe cavity, and a pipe type heater and a temperature control switch KSD302 / KSD301 are arranged in the probe cavity located on the outer ring of the filter element assembly. The outer side of the reverse blowing opening is connected with an instrument air device through an electromagnetic valve, and the sampling probe is high in reliability, small in maintenance amount, energy-saving and long in service life.

Description

TECHNICAL FIELD

[0001] The utility model belongs to flue gas emission detection technical field especially relates to a pipe type heating's self limiting temperature high temperature CEMS sampling probe. BACKGROUND

[0002] In the application of CEMS flue gas emission continuous detection system, sampling probe is installed on the tail flue exhaust point of boiler, generally is directly exposed to air, sampling probe heating is two kinds of heating mode that temperature control switch KSD302 / KSD301 cooperates heating rod or self limiting temperature heat tracing band, wherein, the temperature control switch KSD302 / KSD301 and heating rod used for controlling CEMS probe temperature have the advantages of high heating temperature and large energy, and have the disadvantages of frequent failure, large energy consumption and easy burning out in continuous high temperature operation all the year round.

[0003] The CEMS probe controlled by the self limiting temperature heat tracing band on the market has the advantages of energy saving and few failure, and has the disadvantage of low temperature heating, generally up to 120 degrees at most, due to low temperature, not only can affect the measurement of flue gas humidity, but also the dust is easy to stick on the filter screen, so that the back flushing self cleaning ability is poor, in addition, the wet flue gas is more corrosive, and the service life of the probe is easily reduced.

[0004] Therefore, in view of the above problems, the technical scheme provides a pipe type heating's self limiting temperature high temperature CEMS sampling probe. INVENTION CONTENTS

[0005] The utility model embodiment purposes at providing a pipe type heating's self limiting temperature high temperature CEMS sampling probe, and aims at solving the above problems.

[0006] The utility model is realized in this way, the structure diagram of a pipe type heating's self limiting temperature high temperature CEMS sampling probe, including: probe cavity, filter core assembly, one end of probe cavity is equipped with flue gas inlet, the outer end of flue gas inlet is connected with flue gas pipeline, the inside of probe cavity is provided with filter core assembly, filter core assembly is used to filter the dust in the flue gas input of flue gas inlet, the side of filter core assembly is connected with the flue gas outlet of being set up on probe cavity, the flue gas after being treated by filter core assembly is discharged along flue gas outlet, the inside of probe cavity at the outer ring of filter core assembly is provided with pipe type heater, the outside of probe cavity at the side of flue gas outlet is provided with temperature control switch KSD302 / KSD301, temperature control switch KSD302 / KSD301 starts pipe type heater and heats probe cavity, gasifies the flue gas after passing through the inside of filter core assembly, and keeps the dryness of probe cavity and filter core assembly, and the other side of filter core assembly is provided with back flushing port, the outside of back flushing port is connected instrument air device towards probe cavity by solenoid valve and inputs clean gas, and the inside of probe cavity and filter core assembly are cleaned by back flushing.

[0007] This utility model provides a tubular heating self-limiting high-temperature CEMS sampling probe. By setting a tubular heater and a temperature control switch KSD302 / KSD301 180℃ normally closed, and a high-current ceramic 16A 250V temperature controller to control the self-limiting temperature, the probe heating temperature is greatly increased, improving the corrosion resistance and backflushing self-cleaning ability of the CEMS probe. This can improve the reliability of the CEMS system, reduce maintenance, save energy and extend service life. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of a tubular heating self-limiting high-temperature CEMS sampling probe.

[0009] In the attached diagram: 1. Tubular heater; 2. Probe cavity; 3. Filter assembly; 4. Protective layer; 5. Insulation layer; 6. Cover; 7. Flue gas inlet; 8. Backflush port; 9. Flue gas outlet; 10. Temperature control switch KSD302 / KSD30110. Detailed Implementation

[0010] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0011] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0012] like Figure 1 The diagram shown is a structural diagram of a tubular heating self-limiting high-temperature CEMS sampling probe provided in an embodiment of this utility model. It includes: a probe cavity 2 and a filter assembly 3; one end of the probe cavity 2 is provided with a flue gas inlet 7, the outer end of which is connected to a flue gas pipe; the filter assembly 3 is disposed inside the probe cavity 2, and is used to filter dust in the flue gas input through the flue gas inlet 7; one side of the filter assembly 3 is connected to a flue gas outlet 9 opened on the probe cavity 2; the flue gas treated by the filter assembly 3 is discharged along the flue gas outlet 9; and a filter is disposed inside the probe cavity 2 located on the outer ring of the filter assembly 3. A tubular heater 1 is provided. A temperature control switch KSD302 / KSD30110 is installed on the outside of the probe cavity 2 located on the side of the flue gas outlet 9. The temperature control switch KSD302 / KSD30110 activates the tubular heater 1 to heat the probe cavity 2, vaporizing the flue gas passing through the filter assembly 3, while keeping the probe cavity 2 and the filter assembly 3 dry. At the same time, a backflush port 8 is provided on the other side of the filter assembly 3. The outside of the backflush port 8 is connected to the instrument air device through a solenoid valve to input clean gas toward the probe cavity 2, and the backflush is used to clean the inside of the probe cavity 2 and the filter assembly 3.

[0013] In the embodiment of the utility model, a layer of heat preservation layer 5 is arranged in the cavity inner wall of probe cavity 2, the heat preservation layer 5 is used to keep the internal temperature of probe cavity 2 constant, reduce the temperature reduction speed, thereby improve the heating effect of tubular heater 1;Tubular heater 1 is connected with power supply, and tubular heater 1 is controlled to start through temperature control switch KSD302 / KSD30110, and the temperature can be kept at 180-230 degrees;

[0014] Specifically, since probe cavity 2 is mostly used outdoors and is directly exposed to air, a protective layer 4 is wrapped outside the heat preservation layer 5, and the protective layer 4 is used to increase the protection effect of the heat preservation layer 5, that is, to reduce the damage degree of external impact force or collision to the heat preservation layer 5 or the probe cavity 2;

[0015] To further improve the protection of the probe cavity 2, a group of cover shells 6 are installed outside the probe cavity 2, and the probe cavity 2 is wrapped as a whole by the cover shells 6, and the cover shells 6 are provided with corresponding through holes at positions corresponding to the flue gas inlet 7, the blowback port 8 and the flue gas outlet 9, so that the external pipelines, connection structures and the like can be smoothly connected with the flue gas inlet 7, the blowback port 8 and the flue gas outlet 9, and the smooth operation of the probe cavity 2 is maintained.

[0016] Specifically, the probe cavity 2 is made of stainless steel 316L material;

[0017] The filter core assembly 3 is made of ceramic filter core 50*20*136, stainless steel 316L material accessories and fluorine rubber O-ring sealing;

[0018] The heat preservation layer 5 is made of fluorine rubber material with a thickness of 10 mm;

[0019] The protective layer 4 is made of stainless steel 316L material with an outer diameter size of 127 mm and a thickness of 2 mm;

[0020] The cover shell 6 is made of stainless steel 316L material with a plate thickness of 1.5 mm, an IP56 protection level and a size of 350*295*220.

[0021] In the above embodiment of the utility model, a tubular heating self-limiting high-temperature CEMS sampling probe is provided, when put into operation, the 220VAC tubular heater 1 is connected with power supply through temperature control switch KSD302 / KSD30110 to control the start of the tubular heater 1 to automatically heat, the temperature is controlled at 180-230 degrees, the probe cavity 2 and the filter core assembly 3 are kept temperature stable through the heat preservation layer 5, and the probe cavity 2, the filter core assembly 3 and the flue dust are dried, the high temperature and drying reduce the corrosion of flue gas and improve the corrosion resistance of the CEMS probe, and the service life of the probe is improved;

[0022] When the system samples, the temperature of the probe cavity 2 is controlled at 180-230 degrees, the heat preservation layer 4 and the cover 6 ensure that the probe cavity 2 and the filter core assembly 3 maintain stable temperature, so that the flue gas required for the CEMS main table measurement is not less than 120 degrees, the flue gas is qualified, and the system measurement is stable and reliable;

[0023] When back flushing and self-cleaning, the tube heater 1 continuously heats up to 180 degrees or above, and the heat preservation layer 4 and the cover 6 ensure that the probe cavity 2 and the filter core assembly 3 maintain stable temperature, so that the probe cavity 2 and the filter core assembly 3 and the dust are dry, the back flushing and self-cleaning effect is greatly increased, and the maintenance work is reduced;

[0024] The tube heater 1 works at a maximum heating temperature of 230 degrees and a temperature resistance of 300 degrees, and the solid-state ceramic temperature control switch KSD302 / KSD30110 has low failure rate and high reliability, can effectively reduce the failure rate, has high control system service life, and reduces the use cost.

[0025] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A pipe-type heated self-limited temperature high temperature CEMS sampling probe, characterized in that, It includes: The probe cavity (2), filter core assembly (3); one end of probe cavity (2) is equipped with flue gas inlet (7), the outer end of flue gas inlet (7) is communicated with flue gas pipeline, the inside of probe cavity (2) is provided with filter core assembly (3), one side of filter core assembly (3) is communicated with flue gas outlet (9) opened in probe cavity (2), the inside of probe cavity (2) located the outer circle of filter core assembly (3) is provided with tube heater (1), the outside of probe cavity (2) located one side of flue gas outlet (9) is provided with temperature control switch KSD302 / KSD301 (10), the other side of filter core assembly (3) is opened with back flushing port (8), the outside of back flushing port (8) is connected with instrument air device through electromagnetic valve.

2. A heated, self-limited temperature, high temperature, tube probe CEMS sampling probe according to claim 1, wherein, The inside wall of probe cavity (2) is provided with a layer of heat preservation layer (5), the tube heater (1) and temperature control switch KSD302 / KSD301 (10) are connected with power supply, and its temperature can be kept at 180-230 degrees.

3. A self-limited temperature high temperature CEMS sampling probe according to claim 2, wherein, The outside of heat preservation layer (5) is wrapped with a layer of protective layer (4).

4. A heated, self-limited temperature, high temperature, tube probe CEMS sampling probe according to claim 3, wherein, The outside of probe cavity (2) is installed with a group of cover shells.

5. A self-limited temperature high temperature CEMS sampling probe according to claim 4, wherein, The material of probe cavity (2) is stainless steel 316L, and the material of heat preservation layer (5) is fluorine glue, which is 10mm thick.

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