CN217688184U

CN217688184U - SCR denitration catalyst abrasion strength testing arrangement

Info

Publication number: CN217688184U
Application number: CN202220459102.XU
Authority: CN
Inventors: 熊冬; 唐郭安; 朱文韬; 王东; 张琳
Original assignee: Huadian Electric Power Research Institute Co Ltd
Current assignee: Huadian Electric Power Research Institute Co Ltd
Priority date: 2022-03-04
Filing date: 2022-03-04
Publication date: 2022-10-28
Anticipated expiration: 2032-03-04

Abstract

The utility model discloses a SCR denitration catalyst abrasion strength testing arrangement belongs to flue gas denitration technical field, including fixed bolster, test tube way, contrast storehouse, anemograph, feed system, removable pipeline, sample storehouse, scalable support holder, slidable support, scalable plastic tubing, dust removal and feed back system, draught fan and intelligent centralized control equipment, the device can provide multiple flue gas incident angle, can be more real simulate out the wearing and tearing state of denitration catalyst under actual operation operating mode, and is more accurate to catalyst wearability's judgement. The utility model discloses it all is suitable to detect honeycomb formula catalyst and flat catalyst abrasion strength, and the accuracy of wind speed and abradant concentration has been improved in introducing of intelligence centralized control equipment, and the main part longitudinal arrangement of test tube has improved the space utilization in laboratory.

Description

SCR denitration catalyst abrasion strength testing arrangement

Technical Field

The utility model relates to a SCR denitration catalyst abrasion strength testing arrangement belongs to flue gas denitration technical field.

Background

At present, the requirement for the emission of domestic atmospheric pollutants is becoming strict day by day, and the ultra-low emission policy of flue gas pollutants is basically implemented in large coal-fired power plants. The selective denitration reduction (SCR) is a mainstream denitration technique for coal-fired power plants due to its efficient and mature process, and the denitration catalyst is a core technology of the denitration process, so that it is important to ensure the quality of the denitration catalyst. The catalyst generally adopts the high dust to arrange, constantly receives the washing of fly ash in the flue gas in the operation process, if the abrasion strength of catalyst is not enough, can influence the denitration efficiency of catalyst, to honeycomb catalyst, can lead to the collapse of catalyst layer even, influences denitration system's safe operation. Therefore, the attrition strength of the catalyst is one of the important physicochemical properties, and is one of the important indexes for catalyst performance evaluation and service life estimation.

The existing laboratory abrasion strength detection test device is designed according to the technical specification of flue gas denitration catalyst detection of thermal power plants (DL/T1286-2013) of the power industry standard, and the principle is that airflow carrying an abrasion agent flows through a catalyst test module in parallel to simulate the erosion of flue gas containing fly ash on a catalyst. In the actual operation process of a denitration system, due to factors such as unstable flow field, flue gas can not parallelly pass through the catalyst module, but can have a certain angle to impact the catalyst. Therefore, the existing detection device has certain deviation in the detection result of the abrasion strength compared with the actual working condition.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an it is not enough to overcome the above-mentioned that exists among the prior art, and provides a SCR denitration catalyst abrasion strength testing arrangement that structural design is reasonable, and the device can provide multiple abradant incident angle, can be more true simulation denitration catalyst in the wearing and tearing state under the actual motion operating mode, and is more accurate to the judgement of catalyst wearability.

The utility model provides a technical scheme that above-mentioned problem adopted is: the SCR denitration catalyst abrasion strength testing device is characterized by comprising a fixing support, a testing pipeline, a comparison bin, an anemoscope, a feeding system, a replaceable pipeline, a sample bin, a telescopic supporting support, a slidable support, a telescopic plastic pipe, a dedusting and feed back system and an induced draft fan, wherein the testing pipeline is fixed with the fixing support and comprises a horizontal front section, a longitudinal section and a horizontal rear section, and the comparison bin, the anemoscope, the replaceable pipeline, the sample bin and the anemoscope are sequentially arranged in the longitudinal section of the testing pipeline according to the airflow direction; the feeding system is fixed on the fixed support, the feeding system is connected to the longitudinal section of the testing pipeline, and the connection point is located between the anemoscope and the replaceable pipeline; the testing pipeline below the sample bin is connected with the telescopic supporting bracket, and the position is adjusted and fixed through the telescopic supporting bracket; the horizontal back end of the test pipeline is provided with a slidable support, a telescopic plastic pipe is connected to the test pipeline behind the slidable support, the horizontal back end of the test pipeline is connected to a dust removal and material return system, and the dust removal and material return system is connected with an induced draft fan.

Further, the feed system is including feeding storehouse, inlet pipe, feed control valve and screw feeder, the bottom at feeding storehouse is connected to the inlet pipe, the feed control valve is installed on the inlet pipe, the entry of screw feeder links to each other with the lower extreme of inlet pipe, the test tube way of anemoscope below is inserted in the export of screw feeder.

Furthermore, the replaceable pipeline is a straight pipe, an inclined pipe or a spiral pipe, and can be conveniently detached and is connected with the test pipeline in a sealing manner through a sealing ring.

Furthermore, detachable catalyst sample boxes are arranged in the comparison bin and the sample bin, the cross section of each catalyst sample box is square, the side length of each catalyst sample box is 60-70mm, and the height of each catalyst sample box is 110mm. The structure in the catalyst sample box is designed into two different forms according to honeycomb catalyst and plate catalyst.

Furthermore, the feeding control valve and the screw type feeder are both connected to the intelligent centralized control equipment through sensors, the feeding speed is controlled through the feeding control valve, the abrasion agent is screened 50-60-mesh quartz sand, and the abrasion agent is sent into a testing pipeline under the control of the screw type feeder.

Furthermore, sensors of the anemoscope and the induced draft fan are connected into intelligent centralized control equipment, the induced draft fan is provided with a variable frequency control motor, and the power of the induced draft fan can be dynamically adjusted according to feedback data of the anemoscope.

Further, the dust removal and feed back system comprises a dust filtering device and a recovery and weighing device, and the recovery and weighing device is arranged below the dust filtering device; the test pipeline is connected to the lower end of the dust filtering device, and the induced draft fan is connected to the upper end of the dust filtering device; the dust filtering device is internally provided with a replaceable high-efficiency filter screen, and the lower end of the dust filtering device is directly connected with the recovery and weighing device.

Furthermore, the telescopic support bracket can be inclined according to the requirement to perform horizontal displacement adjustment, and the whole stability of the device can be kept by the aid of the sliding support bracket at the rear end.

Compared with the prior art, the utility model, have following advantage and effect: firstly, the device provides three detection modes with different incident angles, the abrasion degree of the catalyst under different flow fields can be simulated, the obtained abrasion strength data is richer, and the abrasion performance of the catalyst is judged more accurately. Meanwhile, the induced draft fan and the feeding system which are intelligently and centrally controlled can ensure the accuracy of the wind speed and the concentration of the abrasion agent. The device is then suitable for both honeycomb and plate catalysts, increasing the range of applicability of the wear platform. Finally, the main body part of the test pipeline is longitudinally arranged and is consistent with the actual arrangement mode of the power plant catalyst, and the space utilization rate of a laboratory is also improved.

Drawings

FIG. 1 is the utility model discloses SCR denitration catalyst abrasion strength testing arrangement's overall structure schematic diagram.

Fig. 2 is a schematic structural diagram of three forms of the replaceable pipeline in fig. 1.

Fig. 3 is a schematic view of the whole structure of the straight pipe installation of the present invention.

Fig. 4 is a schematic view of the whole structure of the present invention.

Fig. 5 is a schematic view of the overall structure of the present invention.

In the figure: the device comprises a fixed support 1, a test pipeline 2, a comparison bin 3, an anemoscope 4, a feeding system 5, a feeding bin 5-1, a feeding pipe 5-2, a feeding control valve 5-3, a screw type feeder 5-4, a replaceable pipeline 6, a straight pipe 6-1, an inclined pipe 6-2, a spiral pipe 6-3, a sealing ring 7, a sample bin 8, a telescopic supporting support 9, a slidable support 10, a telescopic plastic pipe 11, a dedusting and returning system 12, a dust filtering device 12-1, a recycling and weighing device 12-2, an induced draft fan 13 and intelligent centralized control equipment 14.

Detailed Description

The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.

Examples are given.

Referring to fig. 1 to 5, in this embodiment, an apparatus for testing abrasion strength of an SCR denitration catalyst includes a fixed support 1, a test pipeline 2, a comparison bin 3, an anemograph 4, a feeding system 5, a replaceable pipeline 6, a sample bin 8, a telescopic support 9, a slidable support 10, a telescopic plastic pipe 11, a dust removal and material return system 12 and an induced draft fan 13, wherein the test pipeline 2 is fixed to the fixed support 1, the test pipeline 2 includes a horizontal front section, a longitudinal section and a horizontal rear section, and the comparison bin 3, the anemograph 4, the replaceable pipeline 6, the sample bin 8 and the anemograph 4 are sequentially arranged in the longitudinal section of the test pipeline 2 according to an airflow direction; the feeding system 5 is fixed on the fixed support 1, the feeding system 5 is connected to the longitudinal section of the test pipeline 2, and the connection point is positioned between the anemoscope 4 and the replaceable pipeline 6; the testing pipeline 2 below the sample bin 8 is connected with a telescopic supporting bracket 9, and the position is adjusted and fixed through the telescopic supporting bracket 9; a slidable support 10 is arranged at the horizontal rear section of the test pipeline 2, a telescopic plastic pipe 11 is connected to the test pipeline 2 behind the slidable support 10, the horizontal rear section of the test pipeline 2 is connected to a dust removal and material return system 12, and the dust removal and material return system 12 is connected with an induced draft fan 13.

In the embodiment, the feeding system 5 comprises a feeding bin 5-1, a feeding pipe 5-2, a feeding control valve 5-3 and a screw type feeder 5-4, wherein the feeding pipe 5-2 is connected to the bottom of the feeding bin 5-1, the feeding control valve 5-3 is installed on the feeding pipe 5-2, an inlet of the screw type feeder 5-4 is connected with the lower end of the feeding pipe 5-2, and an outlet of the screw type feeder 5-4 is connected to the testing pipeline 2 below the anemometer 4. The feeding control valve 5-3 and the screw type feeder 5-4 are connected to the existing intelligent centralized control equipment 14 through sensors, the feeding speed is controlled through the feeding control valve 5-3, the abrasion agent is screened 50-60-mesh quartz sand, and the abrasion agent is controlled by the screw type feeder 5-4 to be fed into the testing pipeline 2.

In this embodiment, the replaceable pipeline 6 is a straight pipe 6-1, an inclined pipe 6-2 or a spiral pipe 6-3, which can be conveniently detached, and two ends of the replaceable pipeline 6 are hermetically connected with the test pipeline 2 through a seal ring 7.

In this embodiment, detachable catalyst sample boxes are installed in the comparison bin 3 and the sample bin 8, the cross section of each catalyst sample box is square, the side length of each catalyst sample box is 60mm, and the height of each catalyst sample box is 100mm. The structure in the catalyst sample box is designed into two different forms according to honeycomb catalyst and plate catalyst.

In this embodiment, the sensors of the anemoscope 4 and the induced draft fan 13 are both connected to the existing intelligent centralized control device 14, the induced draft fan 13 is provided with a variable frequency control motor, the power of the induced draft fan 13 can be dynamically adjusted according to the feedback data of the anemoscope 4, the real-time data fed back by the anemoscope 4 is compared with a set value, and then the power of the induced draft fan 13 is adjusted, so as to keep the stability of the wind speed.

In this embodiment, the dust removing and returning system 12 comprises a dust filtering device 12-1 and a recovering and weighing device 12-2, wherein the recovering and weighing device 12-2 is arranged below the dust filtering device 12-1; the test pipeline 2 is connected to the lower end of the dust filtering device 12-1, and the induced draft fan 13 is connected to the upper end of the dust filtering device 12-1; the top of the dust filtering device 12-1 can be opened, a replaceable high-efficiency filter screen is arranged in the dust filtering device, the lower end of the dust filtering device is directly connected with the recovery and weighing device 12-2, and an abrasive recovery box is arranged in the recovery and weighing device 12-2 and can be directly disassembled and cleaned.

In this embodiment, the retractable support 9 can be manually horizontally adjusted, can be horizontally displaced and adjusted at an inclined angle as required, and can be matched with the slidable support 10 at the rear end to keep the overall stability of the device.

The working mode is as follows: first, the straight pipe 6-1 is connected, and the telescopic support bracket 9 is adjusted to keep the test pipe 2 stable. The set wind speed and the concentration of the abrasion agent are input into the intelligent centralized control equipment 14, and the dried and weighed catalyst test modules are placed into the comparison bin 3 and the sample bin 8. And starting the induced draft fan 13, starting the feeding system 5 after the wind speed is stabilized to a set value, and setting the running time after the feeding system 5 is stabilized. After the operation is finished, taking out the sample, drying and weighing, reading the usage amount of the abrasion agent on the recovery and weighing device 12-2, and calculating to obtain the abrasion strength of the catalyst.

The inclined tube 6-2 and the spiral tube 6-3 are replaced, and the operation is repeated.

Those not described in detail in this specification are well within the skill of the art.

In addition, it should be noted that the above contents described in the present specification are only illustrations of the structure of the present invention. All the equivalent changes made by the structure, the characteristics and the principle according to the patent idea of the utility model are included in the protection scope of the utility model. Various modifications, additions and substitutions by those skilled in the art may be made to the described embodiments without departing from the scope of the invention as defined in the accompanying claims.

Claims

1. A SCR denitration catalyst abrasion strength testing device is characterized by comprising a fixed support (1), a testing pipeline (2), a comparison bin (3), an anemograph (4), a feeding system (5), a replaceable pipeline (6), a sample bin (8), a telescopic supporting support (9), a slidable support (10), a telescopic plastic pipe (11), a dust removal and return system (12) and an induced draft fan (13), wherein the testing pipeline (2) is fixed with the fixed support (1), the testing pipeline (2) comprises a horizontal front section, a longitudinal section and a horizontal rear section, and the comparison bin (3), the anemograph (4), the replaceable pipeline (6), the sample bin (8) and the anemograph (4) are sequentially arranged in the longitudinal section of the testing pipeline (2) according to the air flow direction; the feeding system (5) is fixed on the fixed support (1), the feeding system (5) is connected to the longitudinal section of the test pipeline (2), and the connection point is located between the anemoscope (4) and the replaceable pipeline (6); test tube (2) of sample storehouse (8) below is connected with scalable support holder (9), but slidable support (10) have been arranged to the horizontal back end of test tube (2), at the rear of slidable support (10) be connected with scalable plastic tubing (11) on test tube (2), the horizontal back end of test tube (2) is connected to dust removal and feed back system (12), dust removal and feed back system (12) are connected with draught fan (13).

2. The SCR denitration catalyst abrasion strength testing device of claim 1, wherein the feeding system (5) comprises a feeding bin (5-1), a feeding pipe (5-2), a feeding control valve (5-3) and a screw type feeder (5-4), the feeding pipe (5-2) is connected to the bottom of the feeding bin (5-1), the feeding control valve (5-3) is installed on the feeding pipe (5-2), the inlet of the screw type feeder (5-4) is connected with the lower end of the feeding pipe (5-2), and the outlet of the screw type feeder (5-4) is connected to the testing pipeline (2) below the anemometer (4).

3. The SCR denitration catalyst abrasion strength testing device of claim 1, wherein the replaceable pipeline (6) is a straight pipe (6-1), an inclined pipe (6-2) or a spiral pipe (6-3), and the replaceable pipeline (6) is connected with the testing pipeline (2) in a sealing manner through a sealing ring (7).

4. The SCR denitration catalyst abrasion strength testing device of claim 1, wherein a detachable catalyst sample box is arranged in the comparison bin (3) and the sample bin (8), the cross section of the catalyst sample box is square, the side length of the catalyst sample box is 60-70mm, and the height of the catalyst sample box is 110mm.

5. The SCR denitration catalyst abrasion strength testing apparatus according to claim 2, wherein the feed control valve (5-3) and the screw feeder (5-4) are connected to an intelligent centralized control device (14) through sensors.

6. The SCR denitration catalyst abrasion strength testing device of claim 1, wherein sensors of the anemoscope (4) and the induced draft fan (13) are connected to an intelligent centralized control device (14), and the induced draft fan (13) is provided with a variable frequency control motor.

7. The SCR denitration catalyst abrasion strength testing apparatus according to claim 1, wherein the dust removal and feed back system (12) includes a dust filtering device (12-1) and a recovery and weighing device (12-2), the recovery and weighing device (12-2) being disposed below the dust filtering device (12-1); the test pipeline (2) is connected to the lower end of the dust filtering device (12-1), and the induced draft fan (13) is connected to the upper end of the dust filtering device (12-1).