A SCR denitration catalyst wear resistance strength detection device and working method thereof

Abstract

The invention discloses a SCR denitration catalyst anti-wear strength detection device and a working method thereof, which belongs to the field of environmental protection technology, and includes a test system, a feeding system, a return system, a dust removal system, an induced draft fan system and a hydraulic system; the test system includes an air flow meter, a comparison sample bin, a test sample bin, a hydraulic jacking system, a feeder, a mixing flow meter and a test pipeline, the feeding system includes a feeder, a feeding pipeline and a feeding control valve, the return system includes a return conveyor and a return conveying pipe, and the induced draft fan system includes an induced draft fan and a clean air pipeline; the test system is divided into two parts and connected in parallel to the dust removal system, the dust removal system is connected to the induced draft fan system, the feeding system is connected to the feeder and the test system through the feeding pipeline, the return system is connected to the dust removal system through the return conveyor, and is connected to the feeding system through the return conveying pipe. The device has a simple structure, can be arranged in a variety of forms, can be centrally controlled, and is easy to operate.

Description

Technical Field

[0001] The invention relates to a SCR denitration catalyst anti-wear strength detection device and a working method thereof, belonging to the technical field of environmental protection. Background Art

[0002] SCR denitration process is the mainstream denitration technology for domestic coal-fired units, and denitration catalyst is the core of SCR denitration process. Its performance directly affects the performance of SCR denitration device. At present, the supply and demand relationship of denitration catalyst market is seriously unbalanced, resulting in uneven catalyst quality and various quality problems of the catalyst itself. At the same time, since SCR denitration device adopts high ash layout, and domestic coal-fired units often burn high calcium and magnesium, low-quality coal, etc., the catalyst will be eroded and worn by atmospheric airflow and dust for a long time during operation, which will aggravate the wear of the catalyst, shorten the replacement cycle of the catalyst, and increase the daily maintenance cost of thermal power plants.

[0003] The wear resistance of the catalyst itself will directly affect the normal operation of the denitrification reactor. If the wear resistance of the catalyst is too low, it will be difficult to withstand the erosion of fly ash and large airflow, which will directly affect the overall denitrification efficiency of the catalyst and make it impossible to further regenerate the catalyst after deactivation.

[0004] The wear of the catalyst is related to many factors, including the concentration of fly ash in the flue gas, the particle size of the fly ash, the incident angle of the fly ash, the flue gas flow rate, the catalyst operation time, and the hardness of the catalyst itself. The wear resistance of the catalyst directly affects the basic performance of the catalyst. How to accurately detect the wear resistance of the catalyst has become a key link in the performance detection of the catalyst. The present invention provides a catalyst wear resistance detection device that is convenient, fast, simple to operate, and can be connected in series or parallel, so that the wear resistance of the catalyst can be effectively detected, the quality of the catalyst can be guaranteed, and the installation and use of the catalyst can be guided. Summary of the invention

[0005] The purpose of the present invention is to provide a SCR denitration catalyst anti-wear strength detection device and a working method thereof to address the problem that the existing SCR denitration catalyst performance detection is high in cost or cannot fully simulate the actual on-site operating conditions.

[0006] The technical solution adopted by the present invention to solve the above-mentioned problem is: an SCR denitration catalyst anti-wear strength detection device, characterized in that it includes a test system, a feeding system, a return system, a dust removal system, an induced draft fan system and a hydraulic system; the test system includes an air flow meter, a comparison sample bin, a test sample bin, a hydraulic jacking system, a feeding uniform distributor, a mixing flow meter and a test pipeline, the feeding system includes a feeder, a feeding pipeline and a feeding control valve, the return system includes a return conveyor and a return conveying pipe, and the induced draft fan system includes an induced draft fan and a clean air pipeline; the test system is divided into two parts and connected in parallel to the dust removal system, and the dust removal system is connected to the induced draft fan system; in the test system, the test pipeline and the dust removal system are connected in parallel. The test pipeline is connected to the test system, and an air flow meter, a comparison sample bin, a hydraulic lifting system, a feed distributor, a test sample bin, a hydraulic lifting system and a mixing flow meter are arranged in sequence inside the test pipeline; in the feeding system, the feeding pipeline is connected to the feeder, and the feeding control valve is installed on the feeding pipeline; the feeding system is connected to the feed distributor of the test system through the feeding pipeline; in the return system, the return conveying pipe is connected to the return conveyor; the return system is connected to the dust removal system through the return conveyor, and the return system is connected to the feeder of the feeding system through the return conveying pipe; in the induced draft fan system, the clean air duct is connected to the induced draft fan; the induced draft fan system is connected to the dust removal system through the clean air duct; the hydraulic system is connected to the hydraulic lifting system.

[0007] Furthermore, the present invention also includes a control system, which is respectively connected to the air flow meter, the mixing flow meter, the feeder, the return conveyor, and the induced draft fan.

[0008] Furthermore, the test system adopts a parallel arrangement of linear test pipes, or an parallel arrangement of L-shaped test pipes, or an parallel arrangement of L-shaped test pipes and linear test pipes; in the L-shaped test pipe, the comparison sample chamber is arranged in the vertical section of the test pipe, and the test sample chamber is arranged in the horizontal section of the test pipe.

[0009] Furthermore, the dust removal system is arranged vertically, and the dust removal system includes a dust collector shell, a dust collecting chamber, a filter bag, a bag cage, a perforated plate and a bag mouth fixture; the bag cage is arranged inside the dust collector shell, the filter bag is mounted on the bag cage and fixed by the bag mouth fixture at the bottom of the bag cage, the perforated plate is arranged in the middle part of the interior of the dust collector shell, and the dust collecting chamber is arranged at the bottom of the dust collector shell; the clean air duct is connected to the upper part of the dust collector shell, and the test duct is connected to the lower part of the dust collector shell.

[0010] Furthermore, a hinged circulating conveyor belt is arranged in the return material conveying pipe, and the hinged circulating conveyor belt is respectively connected to the driving wheel and the driven gear, the driving wheel is arranged in the return material conveyor, and the driven gear is arranged in the feeder.

[0011] Furthermore, the feed material and the return material in the feed system and the return material system are both abrasives, and the abrasives are made of quartz sand.

[0012] Furthermore, the cross-section of the test pipe is a square structure with a side length of 50 mm-160 mm; the lengths of the comparison sample chamber and the test sample chamber are both 100 mm-160 mm.

[0013] Furthermore, the comparison sample chamber and the test sample chamber are both detachably arranged.

[0014] Furthermore, the feed distributor adopts the Venturi principle to ensure uniform distribution of abrasive through pressure changes.

[0015] The working method of the SCR denitration catalyst anti-wear strength detection device is characterized in that the process is as follows: the catalyst test sample and the comparison sample are respectively placed in the test sample bin and the comparison sample bin, and the hydraulic system is used to push the hydraulic jacking system to seal the sample; after starting the induced draft fan, the air volume is adjusted according to the air flow meter, the feeder is started, and the feeding of the parallel test pipeline is controlled by the feeding control valve, and the feeding amount is adjusted, and the feeding is evenly distributed by the feeding uniformizer; the worn abrasive is collected in the dust collecting chamber by the dust removal system, the return conveyor is started, and the abrasive in the dust collecting chamber is conveyed to the feeder through the return conveying pipe; the flow of the test pipeline is tested by the air flow meter and the mixed flow meter respectively, and the flow accuracy is compared and verified; the start and stop of the induced draft fan, the start and stop of the hydraulic system, the operation of the air flow meter and the mixed flow meter, the switch of the feeding control valve, and the switch of the feeder and the return conveyor are realized by the control system.

[0016] Compared with the prior art, the present invention has the following advantages and effects:

[0017] 1) The test sample and the reference sample can be arranged in parallel or in series. Both arrangements can effectively ensure the consistency of the inlet conditions of the test sample and the reference sample;

[0018] 2) Stably control the wear wind speed according to the air flow meter to ensure the accuracy of the test results;

[0019] 3) The feed uniformizer using the Venturi principle can effectively ensure the uniformity of the abrasive in the air duct, thereby ensuring the uniformity of the wear of the test sample and effectively ensuring the accuracy of the wear results;

[0020] 4) The dust removal system can effectively collect abrasives and effectively reduce the pollution caused by dust;

[0021] 5) The device has a simple structure, can be arranged in a variety of forms, can be centrally controlled, is easy to operate, and is easy to implement, so it is worth promoting. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a layout plan of the SCR denitration catalyst anti-wear strength testing device of the present invention;

[0023] Figure 2 This is a layout elevation view of the SCR denitration catalyst anti-wear strength testing device of the present invention;

[0024] Figure 3 It is a structural schematic diagram of the dust removal system of the present invention;

[0025] Figure 4 It is a schematic diagram of the internal structure of the return material conveying pipe of the present invention;

[0026] Figure 5 It is a schematic diagram of the parallel connection of linear test pipes of the SCR denitration catalyst anti-wear strength testing device of the present invention;

[0027] Figure 6 Schematic diagram of the parallel connection of L-shaped test pipes of the SCR denitration catalyst wear resistance strength testing device of the present invention;

[0028] Figure 7 It is a schematic diagram of the parallel connection of L-shaped and linear test pipes of the SCR denitration catalyst anti-wear strength detection device of the present invention.

[0029] In the figure: test system 1, feeding system 2, return system 3, dust removal system 4, induced draft fan system 5, hydraulic system 6, control system 7, air flow meter 8, comparison sample bin 9, test sample bin 10, hydraulic jacking system 11, feeding distributor 12, mixing flow meter 13, test pipeline 14, feeder 15, feeding pipeline 16, feeding control valve 17, return conveyor 18, return conveying pipe 19, induced draft fan 20, clean air pipeline 21, dust collector housing 22, dust collecting chamber 23, filter bag 24, bag cage 25, orifice plate 26, bag mouth fixer 27, conveyor belt 28, active wheel 29, moving gear 30. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and by way of examples. The following examples are intended to explain the present invention but the present invention is not limited to the following examples.

[0031] like Figure 1 and Figure 2As shown, the SCR denitration catalyst anti-wear strength detection device in this embodiment includes a test system 1, a feeding system 2, a return system 3, a dust removal system 4, an induced draft fan system 5, a hydraulic system 6 and a control system 7; the test system 1 includes an air flow meter 8, a comparison sample bin 9, a test sample bin 10, a hydraulic jacking system 11, a feeding distributor 12, a mixing flow meter 13 and a test pipeline 14, the feeding system 2 includes a feeder 15, a feeding pipeline 16 and a feeding control valve 17, the return system 3 includes a return conveyor 18 and a return conveying pipe 19, and the induced draft fan system 5 includes an induced draft fan 20 and a clean air duct 21.

[0032] like Figure 1 and Figure 2 As shown, the test system 1 is divided into two parts and connected in parallel to the dust removal system 4, and the dust removal system 4 is connected to the induced draft fan system 5; in the test system 1, one end of the test pipe 14 is directly connected to the air, and the other end is connected to the dust removal system 4, and the inside of the test pipe 14 is arranged in sequence with an air flow meter 8, a comparison sample bin 9, a hydraulic jacking system 11, a feed distributor 12, a test sample bin 10, a hydraulic jacking system 11 and a mixing flow meter 13; in the feeding system 2, the feeding pipe 16 is connected to the feeder 15, and the feeding control valve 17 is installed on the feeding pipe 16; the feeding system 2 is connected to the test pipe 16 through the feeding pipe 16. The feeder distributor 12 of system 1 is connected; in the return material system 3, the return material conveying pipe 19 is connected to the return material conveyor 18; the return material system 3 is connected to the dust removal system 4 through the return material conveyor 18, and the return material system 3 is connected to the feeder 15 of the feeding system 2 through the return material conveying pipe 19; in the induced draft fan system 5, the clean air duct 21 is connected to the induced draft fan 20; the induced draft fan system 5 is connected to the dust removal system 4 through the clean air duct 21; the hydraulic system 6 is connected to the hydraulic jacking system 11; the control system 7 is respectively connected to the air flow meter 8, the mixing flow meter 13, the feeder 15, the return material conveyor 18, and the induced draft fan 20.

[0033] like Figure 5 , Figure 6 and Figure 7 As shown, the test system 1 adopts a linear test pipe 14 arranged in parallel, or an L-shaped test pipe 14 arranged in parallel, or an L-shaped test pipe 14 and a linear test pipe 14 arranged in parallel; in the L-shaped test pipe 14, the comparison sample chamber 9 is arranged in the vertical section of the test pipe 14, and the test sample chamber 10 is arranged in the horizontal section of the test pipe 14.

[0034] like Figure 3As shown, the dust removal system 4 is arranged vertically, and the dust removal system 4 includes a dust collector shell 22, a dust collecting chamber 23, a filter bag 24, a bag cage 25, a perforated plate 26 and a bag mouth fixer 27; the bag cage 25 is arranged inside the dust collector shell 22, the filter bag 24 is mounted on the bag cage 25, and is fixed by the bag mouth fixer 27 at the bottom of the bag cage 25, the perforated plate 26 is arranged in the middle of the interior of the dust collector shell 22, and the dust collecting chamber 23 is arranged at the bottom of the dust collector shell 22; the clean air duct 21 is connected to the upper part of the dust collector shell 22, and the test duct 14 is connected to the lower part of the dust collector shell 22.

[0035] like Figure 4 As shown, a hinged circulating conveyor belt 28 is arranged in the return material conveying pipe 19, and the hinged circulating conveyor belt 28 is connected to a driving wheel 29 and a driven gear 30 respectively. The driving wheel 29 is arranged in the return material conveyor 18, and the driven gear 30 is arranged in the feeder 15.

[0036] The feed material and the return material in the feed system 2 and the return system 3 are both abrasives, and the abrasives are made of quartz sand.

[0037] The cross section of the test pipe 14 is a square structure, and the side length thereof is 50 mm-160 mm; the lengths of the comparison sample chamber 9 and the test sample chamber 10 are both 100 mm-160 mm.

[0038] The comparison sample chamber 9 and the test sample chamber 10 are both detachably arranged.

[0039] The feed distributor 12 adopts the Venturi principle to ensure uniform distribution of abrasive through pressure changes.

[0040] The control system 7 can adopt existing mature technologies.

[0041] The working method of the SCR denitration catalyst wear resistance strength detection device is as follows: put the catalyst test sample and the comparison sample into the test sample bin 10 and the comparison sample bin 9 respectively, and push the hydraulic lifting system 11 through the hydraulic system 6 to seal the sample; after starting the induced draft fan 20, adjust the air volume according to the air flow meter 8, start the feeder 15, control the feeding of the parallel test pipeline 14 through the feeding control valve 17, and adjust the feeding amount, and evenly distribute the feeding through the feeding uniformizer 12; The system 4 collects the worn abrasive into the dust collecting chamber 23, starts the return conveyor 18, and conveys the abrasive in the dust collecting chamber 23 to the feeder 15 through the return conveying pipe 19; the flow of the test pipeline 14 is tested respectively by the air flow meter 8 and the mixed flow meter 13, and the accuracy of the flow is verified by comparison; the start and stop of the induced draft fan 20, the start and stop of the hydraulic system 6, the operation of the air flow meter 8 and the mixed flow meter 13, the switching of the feeding control valve 17, and the switching of the feeder 15 and the return conveyor 18 are realized through the control system 7.

[0042] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0043] Although the present invention has been disclosed as above by way of embodiments, it is not intended to limit the protection scope of the present invention. Any changes and modifications made by any technician familiar with the technology without departing from the concept and scope of the present invention should fall within the protection scope of the present invention.

Claims

1. A device for detecting the wear resistance of SCR denitration catalyst, characterized in that: The invention comprises a test system (1), a feeding system (2), a return system (3), a dust removal system (4), an induced draft fan system (5), a hydraulic system (6) and a control system (7); the test system (1) comprises an air flow meter (8), a comparison sample bin (9), a test sample bin (10), a hydraulic lifting system (11), a feed distributor (12), a mixing flow meter (13) and a test pipeline (14); the feeding system (2) comprises a feeder (15), a feeding pipeline (16) and a feeding control valve (17); the return system (3 ) comprises a return material conveyor (18) and a return material conveying pipe (19), the induced draft fan system (5) comprises an induced draft fan (20) and a clean air duct (21); the test system (1) is divided into two parts and connected in parallel to the dust removal system (4), and the dust removal system (4) is connected to the induced draft fan system (5); in the test system (1), the test duct (14) is connected to the dust removal system (4), and an air flow meter (8), a comparison sample bin (9), a hydraulic jacking system (11), a feeder distributor (12), a test A sample bin (10), a hydraulic lifting system (11) and a mixing flowmeter (13); in the feeding system (2), a feeding pipe (16) is connected to a feeder (15), and a feeding control valve (17) is installed on the feeding pipe (16); the feeding system (2) is connected to a feeding distributor (12) of a test system (1) through the feeding pipe (16); in the return system (3), a return conveying pipe (19) is connected to a return conveyor (18); the return system (3) is connected to a dust removal system (4) through the return conveyor (18) , and the return material system (3) is connected to the feeder (15) of the feeding system (2) through the return material conveying pipe (19); in the induced draft fan system (5), the clean air duct (21) is connected to the induced draft fan (20); the induced draft fan system (5) is connected to the dust removal system (4) through the clean air duct (21); the hydraulic system (6) is connected to the hydraulic lifting system (11); the control system (7) is respectively connected to the air flow meter (8), the mixing flow meter (13), the feeder (15), the return material conveyor (18), and the induced draft fan (20); The dust removal system (4) is arranged vertically, and comprises a dust collector housing (22), a dust collecting chamber (23), a filter bag (24), a bag cage (25), a perforated plate (26), and a bag opening fixer (27); the bag cage (25) is arranged inside the dust collector housing (22); the filter bag (24) is sleeved on the bag cage (25) and fixed by the bag opening fixer (27) at the bottom of the bag cage (25); the perforated plate (26) is arranged in the middle of the interior of the dust collector housing (22); the dust collecting chamber (23) is arranged at the bottom of the dust collector housing (22); the clean air duct (21) is connected to the upper part of the dust collector housing (22), and the test duct (14) is connected to the lower part of the dust collector housing (22).

2. The SCR denitration catalyst wear resistance detection device according to claim 1 is characterized in that: The test system (1) adopts a linear test pipeline (14) arranged in parallel, or adopts an L-shaped test pipeline (14) arranged in parallel, or adopts an L-shaped test pipeline (14) and a linear test pipeline (14) arranged in parallel; in the L-shaped test pipeline (14), the comparison sample chamber (9) is arranged in a vertical section of the test pipeline (14), and the test sample chamber (10) is arranged in a horizontal section of the test pipeline (14).

3. The SCR denitration catalyst wear resistance detection device according to claim 1 is characterized in that: A hinged circulating conveyor belt (28) is arranged in the return material conveying pipe (19), and the hinged circulating conveyor belt (28) is respectively connected to a driving wheel (29) and a driven gear (30), the driving gear (29) is arranged in the return material conveyor (18), and the driven gear (30) is arranged in the feeder (15).

4. The SCR denitration catalyst wear resistance detection device according to claim 1, characterized in that: The feed material and the return material in the feed system (2) and the return system (3) are both abrasives, and the abrasives are made of quartz sand.

5. The SCR denitration catalyst wear resistance detection device according to claim 1 or 2, characterized in that: The cross-section of the test pipe (14) is a square structure, and the side length thereof is 50 mm to 160 mm; the lengths of the comparison sample chamber (9) and the test sample chamber (10) are both 100 mm to 160 mm.

6. The SCR denitration catalyst wear resistance detection device according to claim 1, characterized in that: The comparison sample chamber (9) and the test sample chamber (10) are both detachably arranged.

7. A working method of the SCR denitration catalyst wear resistance detection device according to any one of claims 1 to 6, characterized in that: The process is as follows: a catalyst test sample and a comparison sample are placed in a test sample bin (10) and a comparison sample bin (9) respectively, and a hydraulic lifting system (11) is pushed by a hydraulic system (6) to seal the samples; after starting the induced draft fan (20), the air volume is adjusted according to the air flow meter (8), and the feeder (15) is started, and the feed control valve (17) is used to control the feeding of the parallel test pipeline (14), and the feeding amount is adjusted, and the feed is evenly distributed by the feed distributor (12); the worn abrasive is collected into a dust collecting chamber by the dust removal system (4). (23), start the return material conveyor (18), and convey the abrasive in the dust collecting chamber (23) to the feeder (15) through the return material conveying pipe (19); test the flow rate of the test pipe (14) through the air flow meter (8) and the mixed flow meter (13), respectively, and compare and verify the accuracy of the flow rate; and realize the start and stop of the induced draft fan (20), the start and stop of the hydraulic system (6), the operation of the air flow meter (8) and the mixed flow meter (13), the opening and closing of the feeding control valve (17), and the opening and closing of the feeder (15) and the return material conveyor (18) through the control system (7).

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