CN210665631U - Room temperature removes formaldehyde catalyst activity detection device - Google Patents

Abstract

The utility model discloses a room temperature formaldehyde removal catalyst activity detection device, which comprises an air inlet mechanism, a reaction mechanism and a gas-liquid separation mechanism; the air inlet mechanism comprises an air purging pipeline, a reaction gas inlet pipeline and a preheating pipeline; the air purging pipeline and the reaction gas inlet pipeline are respectively communicated to the preheating pipeline, and a pipeline mixer and a first pressure gauge are sequentially arranged at the rear section of the preheating pipeline; the reaction mechanism comprises a formaldehyde catalytic combustion reactor, and the tail end of the preheating pipeline is connected with the formaldehyde catalytic combustion reactor through a heating pipeline; the gas-liquid separation mechanism comprises a cooling pipe and a gas-liquid separation tank, one end of the cooling pipe is correspondingly communicated with a tail gas outlet of the formaldehyde catalytic combustion reactor, and the other end of the cooling pipe is communicated to the gas-liquid separation tank. The utility model discloses a formaldehyde catalytic combustion reaction provides suitable process gas condition, has improved the detection efficiency who removes formaldehyde catalyst sample, easy and simple to handle, save time.

Description

Room temperature removes formaldehyde catalyst activity detection device

Technical Field

The utility model relates to a catalyst activity detection device technical field, concretely relates to room temperature removes formaldehyde catalyst activity detection device.

Background

Formaldehyde is one of the most serious indoor pollutants, has high toxicity, is second highest on the priority control list of toxic chemicals in China, and is determined as a carcinogenic and teratogenic substance by the world health organization. According to statistics, the standard exceeding rate of formaldehyde in a room reaches 80% within 1-6 months after decoration, and the formaldehyde content in a conference room and an office is close to 100%; after decoration for 3 years, the exceeding rate still reaches more than 50%. The release period of formaldehyde in the artificial board is 3-15 years. It can be seen that indoor formaldehyde will affect people's health for a long time, such as bad building syndrome (SBS), building associated syndrome (BRI), etc. In addition, most human diseases are associated with indoor air pollution.

in addition, various formaldehyde elimination products are produced in the market at present, the formaldehyde scavenger (also called formaldehyde scavenger or formaldehyde absorbent) is an aqueous solution containing active organic and inorganic compounds which react with formaldehyde at room temperature, the formaldehyde scavenger is generally divided into 3 types, namely an oxidant type, an amino derivative type and a α -hydrogen compound type, and in 2000, Takagaki and the like, the green tea phenol is expected to be utilized as the formaldehyde scavenger, but the green phenol is not used for catching formaldehyde in indoor air, and the existing application of the green phenol in the market is not found.

The oxidation reaction under mild conditions is an important research content in green chemistry and chemical engineering. If the formaldehyde can be oxidized under a mild reaction condition, the operation cost can be reduced, the pollution can be reduced, and the energy consumption can be reduced. Because formaldehyde is stable in air at normal temperature and normal pressure, complete oxidation and conversion of formaldehyde can be realized only by means of a catalytic technology. Catalytic combustion is a formaldehyde removal technology with a promising application prospect, and formaldehyde can be oxidized into nontoxic carbon dioxide and water at a lower temperature. The technology can completely oxidize the formaldehyde into carbon dioxide and water at room temperature by adopting a catalyst, and the formaldehyde can be removed under the condition of no heat source and no energy source.

In order to remove the formaldehyde catalyst according to indoor or the interior material of car, the spatial distribution of formaldehyde and the reasonable arrangement of release law better, need remove the correlation performance of formaldehyde catalyst to the room temperature and have more clear understanding, like the conversion of catalyst, the life-span of catalyst, catalyst activity etc, the utility model discloses remove formaldehyde catalyst activity to the room temperature and carry out the device that detects promptly.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide a room temperature removes formaldehyde catalyst activity detection device, can detect the room temperature conveniently and swiftly and remove the activity of formaldehyde catalyst.

In order to solve the technical problem, the utility model adopts the following technical scheme:

designing a room temperature formaldehyde removal catalyst activity detection device, which comprises a gas inlet mechanism, a reaction mechanism and a gas-liquid separation mechanism;

the gas inlet mechanism comprises an air purging pipeline, a reaction gas inlet pipeline and a preheating pipeline; the air purging pipeline and the reaction gas inlet pipeline are respectively communicated to the preheating pipeline, and a pipeline mixer and a first pressure gauge are sequentially arranged at the rear section of the preheating pipeline;

a second pressure gauge, a first pressure reducing valve, a first gas mass flowmeter and a first stop valve which are respectively connected with two ends of the first gas mass flowmeter are sequentially arranged on the air purging pipeline, and high-pressure gas is introduced into the air purging pipeline to purge the pipeline;

a first float flowmeter and a first constant temperature water bath are sequentially arranged on the reaction gas inlet pipeline, HCHO gas and air are introduced into the reaction gas inlet pipeline, and the gas sequentially passes through the first float flowmeter and the first constant temperature water bath and then enters the preheating pipeline;

the reaction mechanism comprises a formaldehyde catalytic combustion reactor, and the tail end of the preheating pipeline is connected with the formaldehyde catalytic combustion reactor through a heating pipeline;

the gas-liquid separation mechanism comprises a cooling pipe and a gas-liquid separation tank, one end of the cooling pipe is correspondingly communicated with a tail gas outlet of the formaldehyde catalytic combustion reactor, and the other end of the cooling pipe is communicated to the gas-liquid separation tank; the gas-liquid separation tank is provided with an evacuation port, a tail gas sampling port and a liquid outlet.

In the technical scheme, formaldehyde gas and air in a proper proportion are introduced into a reaction gas inlet pipeline (the proportion is adjusted by a worker carrying out a detection test according to needs), the reaction gas is preheated through a preheating pipeline, then is uniformly mixed through a pipeline mixer, and then enters a formaldehyde catalytic combustion reactor through a heating pipeline, the formaldehyde catalytic combustion reactor is pre-filled with a formaldehyde-removing catalyst to be detected, the reaction gas enters the formaldehyde catalytic combustion reactor and then carries out catalytic combustion reaction with the formaldehyde-removing catalyst, tail gas after reaction firstly enters a cooling pipe for cooling, then enters a gas-liquid separation tank for gas-liquid separation, the gas after gas-liquid separation can be sampled from a tail gas sampling port, and the sampled tail gas enters a gas chromatography analyzer for analysis; and discharging the residual gas through a drain port, and discharging the separated liquid from a liquid outlet. The residual gas in the pipeline can be purged by introducing high-pressure gas into the air purging pipeline.

Preferably, the air inlet mechanism further comprises an air and steam inlet pipeline for introducing air and steam, a second float flowmeter and a second constant temperature water bath kettle are sequentially arranged on the air and steam inlet pipeline, and the air and steam inlet pipeline is communicated to the preheating pipeline. The mixed gas of air and steam is introduced into the air and steam inlet pipeline, so that the humidity of the reaction gas can be adjusted, humid weather in regions such as the south of China can be simulated, and catalytic reaction effects under different air humidity conditions can be obtained.

Preferably, the gas inlet mechanism further comprises a reserved pipeline, and a third pressure gauge, a second pressure reducing valve, a second gas mass flowmeter and second stop valves respectively connected with two ends of the second gas mass flowmeter are sequentially arranged on the reserved pipeline; the reserved pipeline is communicated to the preheating pipeline. The air purging pipeline, the reaction gas inlet pipeline, the air and steam inlet pipeline and the reserved pipeline are of parallel pipeline structures, different pipelines can be used according to different detection requirements, various gas conditions (such as gas flow, flow rate, proportion and the like) required by detection are adjusted, and catalytic reaction effects under different conditions are obtained. The gas mass flow on the reaction gas inlet pipeline and the reserved pipeline is an air mass flow meter or an oxygen mass flow meter.

Preferably, the air purging pipeline is a high-pressure air pipeline and is correspondingly connected with an external air compressor; before the next detection, the high-pressure gas in the pipeline can be blown and swept through the air, so that the influence of the last detection residual gas in the pipeline on the detection result is avoided.

Preferably, the formaldehyde catalytic combustion reactor comprises three sections of temperature-controlled heating tube cores, and temperature-measuring thermocouples are arranged in the tube cores. The three-section temperature control type heating tube core of the formaldehyde catalytic combustion reactor is sequentially divided into three heating zones from top to bottom, reaction gas passes through the formaldehyde catalytic combustion reactor from top to bottom to carry out catalytic combustion reaction, tail gas after reaction is cooled and then enters a gas-liquid separator, and gas after gas-liquid separation is sampled and analyzed.

Preferably, a quartz support is arranged in the middle section of the tube core, and lower absorbent cotton, a powdery formaldehyde removal catalyst and upper absorbent cotton are sequentially filled on the quartz support from bottom to top. The formaldehyde removal catalyst to be detected can be filled into the tube core (suitable for the powdery catalyst) in a powdery filling mode, firstly, the treated absorbent cotton is filled into the bottom of the quartz bracket at the middle section of the tube core, namely the absorbent cotton at the lower part; then pouring the formaldehyde-removing catalyst to be detected slowly above the lower absorbent cotton, wherein the filling height of the formaldehyde-removing catalyst must be within the range of the middle section (constant temperature area), and then putting a certain amount of absorbent cotton (namely the upper absorbent cotton) above the formaldehyde-removing catalyst. And after the filling is finished, starting detection, and allowing reaction gas to enter the formaldehyde catalytic combustion reactor from top to bottom to react with the formaldehyde removal catalyst.

Preferably, a high-temperature resistant quartz smear is arranged in the middle section of the tube core, and a formaldehyde removal catalyst is coated on the high-temperature resistant quartz smear. The formaldehyde removing catalyst (suitable for monolithic catalyst) can be filled in a coating mode, and is coated on a high-temperature resistant quartz smear or other carriers and then is filled in the middle section of the tube core of the formaldehyde catalytic combustion reactor.

Preferably, reaction mechanism is still including setting up three-way valve on formaldehyde catalytic combustion reactor's the entrance point pipeline, three-way valve one end intercommunication heating pipeline, one end intercommunication formaldehyde catalytic combustion reactor's import, the other end intercommunication has the feed gas sample connection, is convenient for carry out sample analysis to the feed gas before the reaction.

Preferably, a stop valve is arranged at the front end of a liquid outlet on the gas-liquid separation tank and used for controlling the discharge of the liquid separated by the gas-liquid separator.

Preferably, the air outlets of the first constant-temperature water bath and the second constant-temperature water bath are respectively provided with a filter for filtering dust in the air, so that the dust is prevented from entering the pipeline to cause blockage.

Compared with the prior art, the utility model has the advantages that: 1. the design of the gas inlet mechanism and the reactor provides proper process gas conditions for the catalytic combustion reaction of formaldehyde, improves the detection efficiency of the formaldehyde removal catalyst sample, is simple and convenient to operate, and saves time; 2. the cooling pipe and the gas-liquid separation tank are arranged, so that water vapor in the reacted tail gas can be removed, the damage of the water vapor in the tail gas to a chromatograph is avoided, and the service life of the chromatograph is prolonged; 3. pipelines capable of adjusting different air humidity are arranged to simulate different climates, and the formaldehyde removal catalyst can be detected under different humidity conditions; 4. the reactor can be flexible and multipurpose, and is suitable for detecting powdery catalysts and integral catalysts; 5. the arrangement of the air purging pipeline can reduce the retention of catalyst dust, water and formaldehyde in the air inlet pipeline, the reactor and the downstream pipeline thereof, and avoid the influence of the residues on the detection result. 6. The three-way valve is arranged in front of the formaldehyde catalytic combustion reactor, so that the reaction gas entering the formaldehyde catalytic combustion reactor can be conveniently sampled.

Drawings

FIG. 1 is a schematic structural view of the device for detecting activity of a room temperature formaldehyde-removing catalyst of the present invention;

FIG. 2 is a schematic view of the filling mode of the powdery formaldehyde removing catalyst;

FIG. 3 is a schematic view of a coating type loading manner of formaldehyde removal catalyst;

reference numbers in the figures: the method comprises the following steps of 1, reserving a pipeline, 2, an air purging pipeline, 3, a reaction gas inlet pipeline, 4, an air and steam inlet pipeline and 5, wherein the preheating pipeline is arranged in the reaction chamber; 6 a first float flowmeter, 7 a second float flowmeter, 8 a third pressure gauge, 12 a second pressure gauge, 19 a first pressure gauge, 9 a second pressure reducing valve, 13 a first pressure reducing valve, 10 a second gas mass flowmeter, 14 a first gas mass flowmeter, 11 a second stop valve, 15 a first stop valve, 16 a first constant temperature water bath kettle and 17 a second constant temperature water bath kettle; an 18-line mixer; 20 formaldehyde catalytic combustion reactor, 21 three-way valve; 22 tube cores, 23 quartz supports, 24 lower absorbent cotton and 25 upper absorbent cotton; 26 cooling pipes, 27 gas-liquid separation tanks, 28 liquid outlets, 29 tail gas sampling and 30 emptying ports; 31 powdered formaldehyde removing catalyst, 32 high temperature resistant quartz smear coated with formaldehyde removing catalyst.

Detailed Description

The following examples are provided only for illustrating the embodiments of the present invention in detail and are not intended to limit the scope of the present invention in any way.

Example 1: a device for detecting the activity of a room-temperature formaldehyde removal catalyst is shown in figure 1 and comprises a gas inlet mechanism, a reaction mechanism and a gas-liquid separation mechanism.

The air inlet mechanism comprises an air purging pipeline 2, a reaction gas inlet pipeline 3 and a preheating pipeline 5; the air purging pipeline 2 and the reaction gas inlet pipeline 3 are respectively communicated to the preheating pipeline 5, and a pipeline mixer 18 and a first pressure gauge 19 are sequentially arranged at the rear section of the preheating pipeline 5. The air purging pipeline 2 is sequentially provided with a second pressure gauge 12, a first pressure reducing valve 13, a first gas mass flowmeter 14 and first stop valves 15 connected with two ends of the first gas mass flowmeter 14, high-pressure gas is introduced into the air purging pipeline 2 to purge the pipeline, and the air purging pipeline 2 is a high-pressure air pipeline and is correspondingly connected with an external air compressor. A first float flowmeter 6 and a first constant temperature water bath 16 are sequentially arranged on the reaction gas inlet pipeline 3, and a filter is arranged at the gas outlet of the first constant temperature water bath 16; the reaction gas inlet pipeline 3 is used for introducing HCHO gas and air, and the gas in the reaction gas inlet pipeline enters the preheating pipeline 5 after passing through the first float flowmeter 6 and the first constant-temperature water bath 16 in sequence.

Further, the air inlet mechanism further comprises an air and steam inlet pipeline 4 for introducing air and steam, a second float flowmeter 7 and a second constant temperature water bath 17 are sequentially arranged on the air and steam inlet pipeline 4, and a filter is arranged at an air outlet of the second constant temperature water bath 17; an air and water vapour inlet line 4 communicates to a preheating line 5.

Further, the air inlet mechanism also comprises a reserved pipeline 1, and a third pressure gauge 8, a second pressure reducing valve 9, a second gas mass flowmeter 10 and a second stop valve 11 which are respectively connected with two ends of the second gas mass flowmeter 10 are sequentially arranged on the reserved pipeline 1; the reserved pipeline 1 is communicated to a preheating pipeline 5. The gas mass flow on the reaction gas inlet pipeline 3 and the reserved pipeline 1 is an air mass flow meter or an oxygen mass flow meter.

The reaction mechanism comprises a formaldehyde catalytic combustion reactor 20, and the tail end of the preheating pipeline 5 is connected with the formaldehyde catalytic combustion reactor 20 through a heating pipeline; the gas-liquid separation mechanism comprises a cooling pipe 26 and a gas-liquid separation tank 27, one end of the cooling pipe 26 is correspondingly communicated with a tail gas outlet of the formaldehyde catalytic combustion reactor 20, and the other end of the cooling pipe is communicated to the gas-liquid separation tank 27; the gas-liquid separation tank 27 is provided with a drain port 30, a tail gas sampling port 29 and a liquid outlet 28, and the front end of the liquid outlet 28 on the gas-liquid separation tank 27 is provided with a stop valve.

The formaldehyde catalytic combustion reactor 20 comprises a three-section temperature control type heating tube core 22, a temperature thermocouple is arranged in the tube core 22, and the formaldehyde catalytic combustion reactor 20 can adopt a three-temperature-zone vertical tube furnace.

A quartz support 23 is arranged in the middle section of the tube core 22, and lower absorbent cotton 24, a powdery formaldehyde removal catalyst 31 and upper absorbent cotton 25 are sequentially filled on the quartz support 23 from bottom to top. When the formaldehyde catalyst to be detected is a powdery catalyst, firstly, filling the treated absorbent cotton at the bottom of the quartz bracket 23 at the middle section of the tube core 22, namely the absorbent cotton at the lower part; then pouring the powdery formaldehyde-removing catalyst to be detected slowly above the lower absorbent cotton, wherein the filling height of the formaldehyde-removing catalyst must be within the range of the middle section (constant temperature area), and then putting a certain amount of absorbent cotton (namely the upper absorbent cotton) above the formaldehyde-removing catalyst. After the filling, the detection is started, and the reaction gas enters the formaldehyde catalytic combustion reactor 20 from top to bottom to react with the formaldehyde removing catalyst.

A high-temperature resistant quartz smear is arranged in the middle section of the tube core 22, and a formaldehyde removing catalyst is coated on the high-temperature resistant quartz smear. When the formaldehyde catalyst to be detected is an integral catalyst, the coating of the integral formaldehyde-removing catalyst is coated on a high-temperature-resistant quartz smear or other carriers, and then the high-temperature-resistant quartz smear 32 coated with the formaldehyde-removing catalyst is loaded into the middle section of the tube core 22 of the formaldehyde catalytic combustion reactor 20.

The reaction mechanism further comprises a three-way valve 21 arranged on the inlet end pipeline of the formaldehyde catalytic combustion reactor 20, one end of the three-way valve 21 is communicated with the heating pipeline, one end of the three-way valve is communicated with the inlet of the formaldehyde catalytic combustion reactor 20, and the other end of the three-way valve is communicated with a raw material gas sampling port.

Each pipeline, pipeline mixer and the like in the room temperature formaldehyde removal catalyst activity detection device are all made of anti-corrosion materials. The room temperature formaldehyde catalyst activity detection device can also comprise a control mechanism, such as a temperature controller for controlling the heating temperature of a heating element of a formaldehyde catalytic combustion reactor, a flow control device for controlling each valve and a gas mass flowmeter in an air inlet mechanism, an alarm device when the pressure or the temperature of a pipeline is abnormal, and the like. These control mechanisms can be implemented by those skilled in the art using existing equipment components as needed.

The apparatus elements referred to in the above embodiments are conventional apparatus elements unless otherwise specified.

The utility model discloses room temperature removes formaldehyde catalyst activity detection device's concrete working method does: placing the formaldehyde-removing catalyst to be detected in the formaldehyde catalytic combustion reactor according to the filling or coating mode; the formaldehyde gas and the air are introduced into a reaction gas inlet pipeline, the gas is preheated by a preheating pipeline, then is uniformly mixed by a pipeline mixer, then enters a formaldehyde catalytic combustion reactor by a heating pipeline, and is subjected to catalytic combustion reaction with a formaldehyde removing catalyst in the formaldehyde catalytic combustion reactor, tail gas generated after the reaction is cooled by a cooling pipe, and then enters a gas-liquid separation tank for gas-liquid separation tank treatment, so that water vapor in the tail gas is removed, the separated gas can be sampled at a tail gas sampling port, and is discharged from an evacuation port together with the gas, and the separated liquid is discharged from a liquid outlet. Set up the three-way valve on formaldehyde catalytic combustion reactor entrance point pipeline, can communicate heating line and formaldehyde catalytic combustion reactor import to communicate and be equipped with the feed gas sample connection, be convenient for take a sample to the gas that gets into in the formaldehyde catalytic combustion reactor for the analysis by detection. The air purging pipeline in the air inlet mechanism is a high-pressure air pipeline and is correspondingly connected with an external air compressor, and the air purging pipeline is filled with high-pressure gas to purge the pipeline, so that residual catalyst dust, water and formaldehyde in the pipeline are reduced, and the influence of the residues on the detection result is avoided. The reserved pipeline can be used as a spare pipeline of the purging pipeline, and normal-pressure air can be introduced to adjust the air concentration of the reaction gas. The air and steam inlet pipeline is used for introducing mixed gas of air and steam and providing reaction environments with different air humidity so as to detect reaction results under different air humidity conditions.

The embodiments of the present invention have been described in detail with reference to the drawings and examples, but the present invention is not limited to the above embodiments, and can be modified or changed within the knowledge of those skilled in the art without departing from the spirit of the present invention.

Claims (10)

1. The activity detection device for the room-temperature formaldehyde removal catalyst is characterized by comprising a gas inlet mechanism, a reaction mechanism and a gas-liquid separation mechanism;

the air inlet mechanism comprises an air purging pipeline (2), a reaction gas inlet pipeline (3) and a preheating pipeline (5); the air purging pipeline (2) and the reaction gas inlet pipeline (3) are respectively communicated with the preheating pipeline (5), and a pipeline mixer (18) and a first pressure gauge (19) are sequentially arranged at the rear section of the preheating pipeline (5);

a second pressure gauge (12), a first pressure reducing valve (13), a first gas mass flowmeter (14) and a first stop valve (15) which are respectively connected with two ends of the first gas mass flowmeter (14) are sequentially arranged on the air purging pipeline (2), and high-pressure gas is introduced into the air purging pipeline (2) to purge the pipeline;

a first float flowmeter (6) and a first constant temperature water bath (16) are sequentially arranged on the reaction gas inlet pipeline (3), HCHO gas and air are introduced into the reaction gas inlet pipeline (3), and the gas sequentially passes through the first float flowmeter (6) and the first constant temperature water bath (16) and then enters the preheating pipeline (5);

the reaction mechanism comprises a formaldehyde catalytic combustion reactor (20), and the tail end of the preheating pipeline (5) is connected with the formaldehyde catalytic combustion reactor (20) through a heating pipeline;

the gas-liquid separation mechanism comprises a cooling pipe (26) and a gas-liquid separation tank (27), one end of the cooling pipe (26) is correspondingly communicated with a tail gas outlet of the formaldehyde catalytic combustion reactor (20), and the other end of the cooling pipe is communicated with the gas-liquid separation tank (27); the gas-liquid separation tank (27) is provided with an emptying port (30), a tail gas sampling port (29) and a liquid outlet (28).

2. The device for detecting the activity of the room-temperature formaldehyde-removing catalyst according to claim 1, wherein the air inlet mechanism further comprises an air and steam inlet pipeline (4) for introducing air and steam, a second float flowmeter (7) and a second constant-temperature water bath (17) are sequentially arranged on the air and steam inlet pipeline (4), and the air and steam inlet pipeline (4) is communicated with the preheating pipeline (5).

3. The device for detecting the activity of the formaldehyde removing catalyst at room temperature according to claim 1 or 2, wherein the gas inlet mechanism further comprises a reserved pipeline (1), and a third pressure gauge (8), a second pressure reducing valve (9), a second gas mass flow meter (10) and second stop valves (11) respectively connected with two ends of the second gas mass flow meter (10) are sequentially arranged on the reserved pipeline (1); the reserved pipeline (1) is communicated to the preheating pipeline (5).

4. The device for detecting the activity of the room-temperature formaldehyde-removing catalyst according to claim 1, wherein the air purging pipeline (2) is a high-pressure air pipeline and is correspondingly connected with an external air compressor.

5. The device for detecting the activity of the room-temperature formaldehyde-removing catalyst according to claim 1, wherein the formaldehyde catalytic combustion reactor (20) comprises a three-section temperature-controlled heating tube core (22), and a temperature thermocouple is arranged in the tube core (22).

6. The device for detecting the activity of the room-temperature formaldehyde-removing catalyst according to claim 5, wherein a quartz support (23) is arranged in the middle section of the tube core (22), and the quartz support (23) is sequentially filled with lower absorbent cotton (24), a powdery formaldehyde-removing catalyst (31) and upper absorbent cotton (25) from bottom to top and is used for detecting the powdery formaldehyde-removing catalyst.

7. The device for detecting the activity of the formaldehyde removing catalyst at room temperature according to claim 5, wherein a high-temperature resistant quartz smear (32) coated with the formaldehyde removing catalyst is arranged in the middle section of the tube core (22) and is used for detecting the integrated formaldehyde removing catalyst.

8. The device for detecting the activity of the formaldehyde catalyst at room temperature according to claim 1, wherein the reaction mechanism further comprises a three-way valve (21) disposed on the inlet end pipeline of the formaldehyde catalytic combustion reactor (20), one end of the three-way valve (21) is communicated with the heating pipeline, the other end is communicated with the inlet of the formaldehyde catalytic combustion reactor (20), and the other end is communicated with a raw material gas sampling port.

9. The device for detecting the activity of the room-temperature formaldehyde-removing catalyst according to claim 1, wherein a stop valve is provided at the front end of a liquid outlet of the gas-liquid separation tank (27).

10. The device for detecting the activity of the room-temperature formaldehyde-removing catalyst according to claim 2, wherein filters are respectively arranged at the air outlets of the first constant-temperature water bath (16) and the second constant-temperature water bath (17).

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