CN210401336U

CN210401336U - Gas chromatograph thermal conductivity detection device

Info

Publication number: CN210401336U
Application number: CN201921055427.6U
Authority: CN
Inventors: 顾忠芹
Original assignee: Jiangsu Citic Youjia Testing Technology Co Ltd
Current assignee: Jiangsu Citic Youjia Testing Technology Co Ltd
Priority date: 2019-07-08
Filing date: 2019-07-08
Publication date: 2020-04-24
Anticipated expiration: 2029-07-08

Abstract

The utility model relates to a gas chromatograph technical field specifically is a gas chromatograph thermal conductivity detection device, including the TCD detector, a edulcoration section of thick bamboo absorbs water, and exhaust-gas treatment case, the TCD detector includes heat conduction cell body, heat preservation and shell, and reference pond and measuring cell are seted up to the inside of heat conduction cell body, are connected with the chromatographic column between reference pond and the measuring cell, and the air duct middle part of being connected between carrier gas admission pipe and the chromatographic column is connected with an edulcoration section of thick bamboo that absorbs water, and one side outer wall below of exhaust-gas treatment case is equipped with one-way disk seat, and the blast pipe is connected with one-: the utility model discloses in, the carrier gas passes through along the edulcoration section of thick bamboo middle part that absorbs water, and the edulcoration section of thick bamboo that absorbs water inside is provided with the air guide blade that is the spiral blade piece, and air guide blade will absorb water the inside of edulcoration section of thick bamboo and separate into spiral helicine passageway, increase with gaseous retention time inside the edulcoration section of thick bamboo that absorbs water for the moisture impurity of the inside of being surveyed gas is fully absorbed by the edulcoration material that absorbs water of edulcoration section of thick bamboo inside.

Description

Gas chromatograph thermal conductivity detection device

Technical Field

The utility model relates to a gas chromatograph technical field specifically is a gas chromatograph thermal conductivity detection device.

Background

The TCD detector has high sensitivity, simple structure and convenient operation, and can generate signals for almost all substances, so the TCD detector is the most commonly used detector in a gas chromatograph and is widely applied.

In the long-time use process of the gas chromatograph, some measured gases contain moisture and impurities, and the moisture is easy to accumulate in a gas guide tube in the TCD detector to influence the detection precision of the TCD detector; after some harmful gas to be detected is detected, the harmful gas to be detected cannot be directly discharged, and the discharged gas to be detected needs to be subjected to reaction, decomposition or absorption treatment to prevent the environment from being polluted.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a gas chromatograph thermal conductivity detection device to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a thermal conductivity detection device of a gas chromatograph comprises a TCD detector, a water absorption impurity removal barrel and a waste gas treatment box, wherein the TCD detector comprises a heat conduction cell body, a heat preservation layer and a shell, the heat preservation layer is arranged on the outer wall tightly attached to the heat conduction cell body, the shell is arranged on the outer wall tightly attached to the heat preservation layer, reference cells and measurement cells which are symmetrically arranged are arranged in the heat conduction cell body, tungsten filaments are arranged in the reference cells and the measurement cells, the upper portion of each reference cell is communicated with a carrier gas inlet pipe, the bottom end of each reference cell is connected with one end of a chromatographic column through a gas guide pipe, the other end of the chromatographic column is communicated with the bottom of the measurement cell through a gas guide pipe, the upper portion of each measurement cell is communicated with an exhaust pipe, the middle portion of the gas guide pipe connected between the carrier gas inlet pipe and the chromatographic column is communicated with one side of the water absorption impurity removal barrel, the exhaust gas treatment device is characterized in that an exhaust gas treatment material is filled in the exhaust gas treatment cavity, a one-way valve seat is arranged below the outer wall of one side of the exhaust gas treatment box, a valve cavity is formed in the one-way valve seat, the valve cavity is communicated with the exhaust gas treatment cavity, the exhaust pipe is welded with the one-way valve seat and communicated with the valve cavity, a sealing valve core is arranged in the valve cavity, a compression spring is connected between the sealing valve core and the inner side wall of the valve cavity, and a discharge.

Preferably, the air guide blade is a spiral blade-shaped guide blade, and the outer edge of the air guide blade is arranged close to the inner wall of the water absorption and impurity removal barrel.

Preferably, the other side of the water absorption and impurity removal barrel is connected with a barrel cover through threads, the middle of the barrel cover is welded and communicated with a sample inlet pipe, and a water absorption and impurity removal material is filled between the air guide blade and an inner cavity of the water absorption and impurity removal barrel.

Preferably, the sealing valve core is an elastic ball body and is arranged close to the joint of the exhaust pipe and the valve cavity.

Preferably, a filter screen is arranged at the joint of the valve cavity and the waste gas treatment cavity, and the filter screen is arranged at a discharge port formed in the side wall above the waste gas treatment box.

Compared with the prior art, the beneficial effects of the utility model are that:

1. in the utility model, the carrier gas passes through the middle part of the water absorption impurity removal barrel, the inside of the water absorption impurity removal barrel is provided with the air guide blade in the shape of a spiral blade, the air guide blade separates the inside of the water absorption impurity removal barrel into spiral channels, and the detention time of the gas in the water absorption impurity removal barrel is increased, so that the water impurities in the measured gas are fully absorbed by the water absorption impurity removal material in the water absorption impurity removal barrel;

2. the utility model discloses in the gas after having detected enters into the exhaust-gas treatment case through the inside valve pocket of one-way disk seat, the valve pocket is inside to sticiss the entry of blast pipe through the sealed case that spring coupling has for gas can only be one-way ventilates the exhaust-gas treatment case, prevents the gas adverse current, leads to TCD detector inaccurate to the detection of gas, and the gas through the valve pocket enters into the exhaust-gas treatment chamber of exhaust-gas treatment incasement portion, reacts, absorbs with the exhaust-gas treatment material of exhaust-gas treatment intracavity portion and handles.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a front sectional view of the structure of the present invention;

fig. 3 is an enlarged view of a portion a in fig. 2.

In the figure: the device comprises a TCD detector 1, a water absorption and impurity removal barrel 2, a waste gas treatment box 3, a heat conduction tank body 4, a heat preservation layer 5, a shell 6, a reference tank 7, a measurement tank 8, a carrier gas inlet pipe 9, a tungsten filament 10, a chromatographic column 11, an exhaust pipe 12, a sample inlet pipe 13, an air guide blade 14, a one-way valve seat 15, a valve cavity 16 and a sealing valve core 17.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 3, the present invention provides a technical solution: a thermal conductivity detection device of a gas chromatograph comprises a TCD detector 1, a water absorption impurity removal barrel 2 and a waste gas treatment box 3, and is shown by combining a figure 1 and a figure 2, wherein the TCD detector 1 comprises a heat conduction tank body 4, a heat preservation layer 5 and a shell 6, the heat preservation layer 5 is arranged on the outer wall tightly attached to the heat conduction tank body 4, the heat preservation layer 5 is used for preserving and insulating heat of the heat conduction tank body 4, the shell 6 is arranged on the outer wall tightly attached to the heat preservation layer 5, a reference tank 7 and a measurement tank 8 which are symmetrically arranged are arranged in the heat conduction tank body 4, tungsten filaments 10 are arranged in the reference tank 7 and the measurement tank 8, a carrier gas inlet pipe 9 is communicated with the upper part of the reference, in order to let in pure carrier gas, the bottom end of the reference cell 7 is connected with one end of a chromatographic column 11 through an air duct, the other end of the chromatographic column 11 is communicated with the bottom of the measuring cell 8 through the air duct, and the upper part of the measuring cell 8 is communicated with an exhaust pipe 12.

Referring to fig. 1 and 2, the middle of the gas guide tube connected between the carrier gas inlet tube 9 and the chromatographic column 11 is connected to one side of the water absorption impurity removal tube 2, the water absorption impurity removal tube 2 is a cylinder, the gas guide blade 14 is arranged inside the water absorption impurity removal tube 2, the gas guide blade 14 is a spiral blade-shaped guide sheet, the outer edge of the gas guide blade 14 is closely attached to the inner wall of the water absorption impurity removal tube 2, the gas guide blade 14 partitions the inside of the water absorption impurity removal tube 2 into spiral channels to increase the retention time of the gas inside the water absorption impurity removal tube 2, the water absorption impurity removal material is filled between the gas guide blade 14 and the inner cavity of the water absorption impurity removal tube 2 for absorbing the water and impurities in the gas to be detected, the other side of the water absorption impurity removal tube 2 is connected to a tube cover through a screw thread, the water absorption impurity removal material inside the water absorption impurity removal tube 2 can be replaced after the tube cover is opened, the, the sample inlet pipe 13 is used for introducing the gas to be detected into the water absorption and impurity removal cylinder 2.

Referring to fig. 2 and 3, a waste gas treatment chamber is arranged inside the waste gas treatment box 3, a corresponding waste gas treatment material is filled in the waste gas treatment chamber according to the measured gas for reacting and absorbing harmful measured gas, a one-way valve seat 15 is arranged below the outer wall of one side of the waste gas treatment box 3, a valve cavity 16 is arranged inside the one-way valve seat 15, the valve cavity 16 is communicated with the waste gas treatment chamber, a filter screen is arranged at the joint of the valve cavity 16 and the waste gas treatment chamber to prevent the waste gas treatment material from entering the valve cavity 16, an exhaust pipe 12 is welded with the one-way valve seat 15 and communicated with the valve cavity 16, the detected gas enters the waste gas treatment chamber inside the waste gas treatment box 3 along the valve cavity 16, a sealing valve core 17 is arranged inside the valve cavity 16, the sealing valve core 17 is an elastic sphere, and a compression spring is connected between the sealing valve core 17, under compression spring's effect, sealed case 17 hugs closely the junction setting of blast pipe 12 and valve pocket 16 for gas can only be one-way ventilate exhaust-gas treatment case 3, prevents gaseous adverse current, leads to TCD detector 1 inaccurate to gaseous detection, and the discharge port has been seted up to the top lateral wall of exhaust-gas treatment case 3 for gas after the absorption reaction is handled is discharged, and discharge port department is provided with the filter screen, prevents that the exhaust-gas treatment material from spilling.

The working principle is as follows: the utility model discloses during operation, let in pure carrier gas through carrier gas inlet pipe 9 toward reference pond 7 inside, and the carrier gas is derived along reference pond 7 bottom, mix with the measured gas that impurity removal section of thick bamboo 2 that absorbs water inserts, wherein absorb water and be provided with air guide vane 14 that is spiral blade form inside impurity removal section of thick bamboo 2, air guide vane 14 separates the inside of impurity removal section of thick bamboo 2 that absorbs water into spiral helicine passageway, increase the detention time of gas in impurity removal section of thick bamboo 2 that absorbs water, make the moisture impurity of measured gas inside be absorbed by the impurity removal material that absorbs water inside impurity removal section of thick bamboo 2 fully, the mixture of carrier gas and measured gas separates through chromatographic column 11 and enters into measuring cell 8 inside, according to the current variation on the wheatstone bridge that tungsten filament 10 constitutes that flows through reference pond 7 and measuring cell 8 inside, can record the change of tungsten filament 10 surface temperature, the gas after the detection enters into the valve pocket 16 inside one-way disk seat 15 by blast pipe 12, the inside sealed case 17 that is provided with of valve pocket 16, be connected with pressure spring between sealed case 17 and the valve pocket 16 inside wall, under pressure spring's effect, sealed case 17 hugs closely the junction setting of blast pipe 12 and valve pocket 16, make gaseous can only the one-way exhaust-gas treatment case 3 of ventilating, prevent the gas adverse current, it is inaccurate to lead to TCD detector 1 to the measuring of gas, the gas through valve pocket 16 enters into the exhaust-gas treatment chamber of exhaust-gas treatment case 3 inside, react with the exhaust-gas treatment material of exhaust-gas treatment intracavity portion, the absorption is handled, at last will absorb the gas after the reaction is handled and discharge.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a gas chromatograph thermal conductivity detection device, includes TCD detector (1), a edulcoration section of thick bamboo of absorbing water (2) and exhaust-gas treatment case (3), its characterized in that: the TCD detector (1) comprises a heat conduction cell body (4), a heat preservation layer (5) and a shell (6), the heat preservation layer (5) is arranged on the outer wall tightly attached to the heat conduction cell body (4), the shell (6) is arranged on the outer wall tightly attached to the heat preservation layer (5), a reference cell (7) and a measurement cell (8) which are symmetrically arranged are arranged in the heat conduction cell body (4), tungsten filaments (10) are arranged in the reference cell (7) and the measurement cell (8), the upper part of the reference cell (7) is communicated with a carrier gas inlet pipe (9), the bottom end of the reference cell (7) is connected with one end of a chromatographic column (11) through a gas guide pipe, the other end of the chromatographic column (11) is communicated with the bottom of the measurement cell (8) through a gas guide pipe, the upper part of the measurement cell (8) is communicated with an exhaust pipe (12), the middle part of the gas guide pipe connected between the carrier gas inlet pipe, the water absorption impurity removal barrel (2) is a cylinder, an air guide blade (14) is arranged inside the water absorption impurity removal barrel (2), a waste gas treatment cavity is formed in the waste gas treatment box (3), a waste gas treatment material is filled in the waste gas treatment cavity, a one-way valve seat (15) is arranged below the outer wall of one side of the waste gas treatment box (3), a valve cavity (16) is formed in the one-way valve seat (15), the valve cavity (16) is communicated with the waste gas treatment cavity, an exhaust pipe (12) is welded with the one-way valve seat (15), the exhaust pipe (12) is communicated with the valve cavity (16), a sealing valve core (17) is arranged inside the valve cavity (16), a compression spring is connected between the sealing valve core (17) and the inner side wall of the valve cavity (16), and a discharge port is formed.

2. A gas chromatograph thermal conductivity detection device as in claim 1, wherein: the air guide blade (14) is a spiral blade-shaped guide blade, and the outer edge of the air guide blade (14) is tightly attached to the inner wall of the water absorption and impurity removal barrel (2).

3. A gas chromatograph thermal conductivity detection device as in claim 1, wherein: the other side of the water absorption and impurity removal barrel (2) is connected with a barrel cover through threads, the middle of the barrel cover is welded and communicated with a sample inlet pipe (13), and a water absorption and impurity removal material is filled between an air guide blade (14) and an inner cavity of the water absorption and impurity removal barrel (2).

4. A gas chromatograph thermal conductivity detection device as in claim 1, wherein: the sealing valve core (17) is an elastic ball, and the sealing valve core (17) is tightly attached to the joint of the exhaust pipe (12) and the valve cavity (16).

5. A gas chromatograph thermal conductivity detection device as in claim 1, wherein: a filter screen is arranged at the joint of the valve cavity (16) and the waste gas treatment cavity, and the filter screen is arranged at the discharge port formed on the side wall above the waste gas treatment box (3).