A mobile test system and method for denitration catalyst performance

Abstract

The present invention discloses a mobile test system and method for denitration catalyst performance, which comprises a flue gas sampling module, a flue gas heating and waste heat recovery module and a plurality of catalyst detection modules. The modules are independently arranged and can be connected in sequence through an inlet pipe and a loop pipe. At the same time, the inlet pipe of the flue gas heating and waste heat recovery module is connected to a gas distribution module and a flue gas analysis module, so that the flue gas entering the system can be analyzed. The system can be disassembled and assembled, and is convenient for transportation and carrying, and can solve the problem of high cost of building a test platform in a power plant.

Description

Technical Field

[0001] The patent of this invention relates to a boiler test system in the thermal power industry, and specifically to a mobile test system and method for denitrification catalyst performance. Background Art

[0002] At present, the denitrification catalyst detection / development test platform mainly uses N 2 As the main components of simulated flue gas, different concentrations of NOx and NH 3 Gases with equal components are mainly arranged in the test room.

[0003] However, due to the complexity of coal quality, the effects of trace components in flue gas on the activity of denitrification catalysts vary greatly when burning different coal qualities and different combustion methods. If we want to study the effects of different trace components in flue gas on denitrification catalysts, we generally use sampling detection or building an on-site test platform.

[0004] However, sampling inspection can only be carried out when the unit is shut down, and it needs to be coordinated with the power plant's maintenance time and plan, which causes a waste of time and has great limitations and is extremely inconvenient. The investment in building an on-site test platform is high, and the equipment cannot be moved, which easily leads to a waste of investment. Summary of the invention

[0005] In view of the problem of poor adaptability of the denitration catalyst detection platform in the prior art, the present invention provides a denitration catalyst performance mobile test system and method.

[0006] The present invention is achieved through the following technical solutions:

[0007] A mobile test system for denitration catalyst performance, comprising a flue gas sampling module, a flue gas heating and waste heat recovery module, a catalyst detection module, a gas distribution module, a gas supply module and a flue gas analysis module, all of which are separately arranged;

[0008] The flue gas sampling module, the flue gas heating and waste heat recovery module and the catalyst detection module are all provided with inlet pipes and loop pipes in parallel;

[0009] The flue gas heating and waste heat recovery module comprises a heat exchanger and a first mixer, a second mixer and a flue gas heater which are sequentially connected to the inlet pipe therein; the hot end of the heat exchanger is connected to the inlet pipe upstream of the first mixer, and the cold end is connected to the loop pipe of the flue gas heating and waste heat recovery module;

[0010] At least one catalyst detection module is cascaded on the inlet pipeline and the loop pipeline of the flue gas heating and waste heat recovery module through the inlet pipeline and the loop pipeline; the free ends of the inlet pipeline and the loop pipeline of the final catalyst detection module are connected to form a flue gas loop;

[0011] The inlet pipeline of the flue gas heating and waste heat recovery module is respectively provided with a first branch, a second branch and a third branch, and the loop pipeline is provided with a fourth branch; the first branch is provided at one side of the input end of the heat exchanger, the second branch is provided between the first mixer and the second mixer, the third branch is provided at one side of the output end of the second mixer, and the fourth branch is provided on the loop pipeline at a position corresponding to the third branch;

[0012] The first branch and the second branch are respectively connected to the gas outlet end of the gas distribution module, and the third branch and the fourth branch are respectively connected to the sampling end of the flue gas analysis module;

[0013] The air inlet end of the air distribution module is connected to the air outlet end of the air supply module.

[0014] Furthermore, the flue gas sampling module, the flue gas heating and waste heat recovery module, the catalyst detection module, the air distribution module, the air supply module and the flue gas analysis module all include a module frame for providing an installation position.

[0015] Further, the smoke sampling module includes a filter, a smoke sampling temperature sensor and a smoke sampling pressure sensor which are sequentially arranged on the internal inlet pipe;

[0016] The smoke sampling module also includes a suction fan, a smoke exhaust temperature sensor and a smoke exhaust pressure sensor which are sequentially arranged on the inner loop pipeline thereof.

[0017] Furthermore, the hot fluid in the heat exchanger is the hot flue gas in the inlet pipeline, and the cold fluid is the cold flue gas in the loop pipeline.

[0018] Furthermore, the catalyst detection module includes a catalyst detection box, a catalyst detection temperature sensor and a catalyst detection pressure sensor which are sequentially arranged on the inner inlet pipe.

[0019] Furthermore, the gas outlet end of the gas distribution module includes a first gas supply branch, a second gas supply branch and a third gas supply branch arranged in parallel;

[0020] The first gas supply branch and the second gas supply branch are connected to the first branch of the flue gas heating and waste heat recovery module, and the third gas supply branch is connected to the second branch of the flue gas heating and waste heat recovery module;

[0021] The first gas supply branch, the second gas supply branch and the third gas supply branch are respectively provided with corresponding flow meters and valves.

[0022] Furthermore, the gas supply module includes a nitric oxide gas cylinder, a sulfur dioxide gas cylinder and an ammonia gas cylinder.

[0023] The gas outlet end of the gas supply module includes the output ends of the nitric oxide gas cylinder, the sulfur dioxide gas cylinder and the ammonia gas cylinder, and the output ends are respectively connected to the first gas supply branch, the second gas supply branch and the third gas supply branch of the gas distribution module in sequence.

[0024] Further, the sampling end of the flue gas analysis module includes a first flue gas analysis branch and a second flue gas analysis branch arranged in parallel;

[0025] The first flue gas analysis branch and the second flue gas analysis branch respectively include a flue gas pretreatment device and a flue gas analyzer arranged in series;

[0026] The first flue gas analysis branch is connected to the third branch of the heating and waste heat recovery system;

[0027] The second flue gas analysis branch is connected to the fourth branch of the heating and waste heat recovery system.

[0028] A mobile test method for denitration catalyst performance comprises the following steps:

[0029] Sequentially and hermetically connecting a flue gas sampling module, a flue gas heating and waste heat recovery module, a catalyst detection module, a gas distribution module, a gas supply module and a flue gas analysis module which are separately provided, to form a flue gas loop;

[0030] The real flue gas enters the inlet pipe of the flue gas sampling module and passes through the flue gas heating and waste heat recovery module and the catalyst detection module in sequence, and is discharged through the loop pipe of the flue gas sampling module;

[0031] The flue gas analysis module measures the catalytic performance data of the real flue gas, and adjusts the gas distribution module according to the data to obtain the simulated flue gas;

[0032] The simulated flue gas is cooled by the heat exchanger, mixed by the first mixer and the second mixer, and heated by the flue gas heater in the inlet pipe of the flue gas heating and waste heat recovery module. The flue gas analysis module analyzes the simulated flue gas and discharges it to the catalyst detection module to obtain multiple sets of catalytic performance data.

[0033] Furthermore, the multiple sets of catalytic performance data are different data obtained through different connection modes of several levels of catalyst detection modules.

[0034] Compared with the prior art, the present invention has the following beneficial technical effects:

[0035] The present invention discloses a mobile test system for denitration catalyst performance, which comprises a flue gas sampling module, a flue gas heating and waste heat recovery module and a plurality of catalyst detection modules. The modules are independently arranged and can be connected in sequence through an inlet pipe and a loop pipe. At the same time, the inlet pipe of the flue gas heating and waste heat recovery module is connected to a gas distribution module and a flue gas analysis module, so that the flue gas entering the system can be analyzed. The system can be disassembled and assembled, and is convenient for transportation and carrying, and can solve the problem of high cost of building a test platform in a power plant.

[0036] Furthermore, the loop pipe of the flue gas heating and waste heat recovery module extends into the cold side of the heat exchanger to provide a cold source for the heat exchanger, which is used to reduce the temperature of the hot flue gas in the inlet pipe, thereby reducing energy consumption and saving energy.

[0037] The present invention discloses a mobile test method for denitration catalyst performance, which comprises the following steps: sealing and assembling a flue gas sampling module, a flue gas heating and waste heat recovery module and at least one catalyst detection module, collecting components of real flue gas through a flue gas analysis module, simulating real flue gas through a gas distribution module and a gas supply module, and obtaining simulated flue gas through cooling, multi-stage stirring and heating. The simulated flue gas enters a catalyst detection module to obtain multiple groups of catalytic performance data when multiple catalyst detection modules are connected; and multiple groups of catalytic performance data are obtained by assembling multiple groups of catalyst detection modules for testing, which can solve the problems of extremely poor convenience, high investment in building a field test platform, and non-movable equipment, which easily leads to waste of investment. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of a mobile test system for denitration catalyst performance in a specific embodiment of the present invention.

[0039] In the figure: flue gas sampling module 1, filter 11, flue gas sampling pressure sensor 12, flue gas sampling temperature sensor 13, suction fan 14, flue gas exhaust pressure sensor 15, flue gas exhaust temperature sensor 16, flue gas heating and waste heat recovery module 2, heat exchanger 21, first mixer 22, second mixer 23, flue gas heater 24, catalyst detection module 3, catalyst detection box 31, catalyst detection pressure sensor 32, catalyst detection temperature sensor 33, gas distribution module 4, flow meter 41, valve 42, flue gas analysis module 5, flue gas pretreatment device 51, flue gas analyzer 52, gas supply module 6, nitric oxide gas cylinder 61, sulfur dioxide gas cylinder 62, ammonia gas cylinder 63. DETAILED DESCRIPTION

[0040] The present invention is further described in detail below in conjunction with specific embodiments, which are intended to explain the present invention rather than to limit it.

[0041] The present invention provides a mobile test system for denitration catalyst performance, such as Figure 1As shown, it includes a flue gas sampling module 1, a flue gas heating and waste heat recovery module 2, a catalyst detection module 3, a gas distribution module 4, a gas supply module 6 and a flue gas analysis module 5, which are all separately arranged;

[0042] The flue gas sampling module 1, the flue gas heating and waste heat recovery module 2 and the catalyst detection module 3 are all provided with inlet pipes and loop pipes in parallel;

[0043] The flue gas heating and waste heat recovery module 2 comprises a heat exchanger 21 and a first mixer 22, a second mixer 23 and a flue gas heater 24 which are sequentially connected to the inlet pipe therein; the hot end of the heat exchanger 21 is connected to the inlet pipe upstream of the first mixer 22, and the cold end is connected to the loop pipe of the flue gas heating and waste heat recovery module 2;

[0044] At least one catalyst detection module 3 is cascaded on the inlet pipe and the loop pipe of the flue gas heating and waste heat recovery module 2 through the inlet pipe and the loop pipe; the free ends of the inlet pipe and the loop pipe of the final catalyst detection module 3 are connected to form a flue gas loop;

[0045] The inlet pipe of the flue gas heating and waste heat recovery module 2 is respectively provided with a first branch, a second branch and a third branch, and the loop pipe is provided with a fourth branch; the first branch is provided at the input end side of the heat exchanger 21, the second branch is provided between the first mixer 22 and the second mixer 23, the third branch is provided at the output end side of the second mixer 23, and the fourth branch is provided on the loop pipe at a position corresponding to the third branch;

[0046] The first branch and the second branch are respectively connected to the gas outlet end of the gas distribution module 4, and the third branch and the fourth branch are respectively connected to the sampling end of the flue gas analysis module 5;

[0047] The air inlet end of the air distribution module 4 is connected to the air outlet end of the air supply module 6 .

[0048] Specifically, the inlet pipe of the flue gas sampling module 1 is used to connect to the exhaust system of the power plant boiler to connect the flue gas to this system, and its loop pipe is used to finally exhaust the flue gas collected or simulated by this system.

[0049] Specifically, the hot fluid in the heat exchanger 21 is the hot flue gas in the inlet pipe, and the cold fluid is the cold flue gas in the loop pipe. This structure makes full use of the drop in the flue gas temperature in the inlet pipe and the loop pipe to cool the flue gas in the inlet pipe, which can reduce energy consumption and play a role in energy saving.

[0050] Specifically, the flue gas sampling module 1, the flue gas heating and waste heat recovery module 2, the catalyst detection module 3, the gas distribution module 4, the gas supply module 6 and the flue gas analysis module 5 are all sealed and connected through quick interfaces.

[0051] A preferred embodiment provided by the present invention is that the flue gas sampling module 1, the flue gas heating and waste heat recovery module 2, the catalyst detection module 3, the air distribution module 4, the air supply module 6 and the flue gas analysis module 5 all include a module frame for providing an installation position, and the module frame is reserved with a communication interface, a display window and a connection port for interconnection with other systems. After each module is transported to the site, it is assembled on site to form a complete catalyst performance test system.

[0052] Another preferred embodiment provided by the present invention is that the smoke sampling module 1 comprises a filter 11, a smoke sampling temperature sensor 13 and a smoke sampling pressure sensor 12 which are sequentially arranged on the inner inlet pipe thereof;

[0053] The flue gas sampling module 1 also includes a suction fan 14, a flue gas exhaust temperature sensor 16 and a flue gas exhaust pressure sensor 15 which are sequentially arranged on the inner loop pipe. Specifically, the suction fan 14 is used to provide the whole system with kinetic energy for the flue gas to enter and exhaust, the flue gas exhaust temperature sensor 16 is used to detect the temperature of the exhaust flue gas, and the flue gas exhaust pressure sensor 15 is used to display the pressure value of the exhaust flue gas, which can detect the adaptability of the wind speed of the suction fan 14, so that the flue gas can complete the whole process of the system along the inlet loop pipe of the system. Specifically, a check valve is also arranged on one side of the filter 11 of the flue gas sampling module 1 to prevent the flue gas from flowing back and causing inaccurate detection of catalytic performance.

[0054] Another preferred embodiment provided by the present invention is that the catalyst detection module 3 includes a catalyst detection box 31, a catalyst detection temperature sensor 33 and a catalyst detection pressure sensor 32 which are sequentially arranged on the inner inlet pipe, and are specifically used to catalyze the components in the flue gas. At the same time, the catalyst detection module 3 can be more groups connected in series or in parallel, and is used to measure the catalytic effect data of the catalyst detection module 3 under various conditions, such as Figure 1 As shown, the present invention provides two groups of catalyst detection modules 3 which are connected in series step by step. The free ends of the inlet pipe and the loop pipe inside the last-stage catalyst detection module 3 are connected to each other to form a flue gas loop. At the same time, in a specific implementation, a single catalyst detection module 3 can also be used to detect the catalyst performance, or three catalyst detection modules 3 can be connected in series step by step to detect the catalyst performance.

[0055] Another preferred embodiment provided by the present invention is that the gas outlet end of the gas distribution module 4 includes a first gas supply branch, a second gas supply branch and a third gas supply branch which are arranged in parallel; the first gas supply branch and the second gas supply branch merge and are connected to the first branch of the flue gas heating and waste heat recovery module 2, and the third gas supply branch is connected to the second branch of the flue gas heating and waste heat recovery module 2; the first gas supply branch, the second gas supply branch and the third gas supply branch are respectively provided with corresponding flow meters 41 and valves 42, the flow meter 41 can adopt an FT MCS flow meter, and the valve 42 can adopt a 20HSK10 regulating valve, which are used to adjust and monitor the gas flow input into the heating and waste heat recovery system 2.

[0056] Another preferred embodiment provided by the present invention is that the sampling end of the smoke analysis module 5 includes a first smoke analysis branch and a second smoke analysis branch arranged in parallel;

[0057] The first flue gas analysis branch and the second flue gas analysis branch respectively include a flue gas pretreatment device 51 and a flue gas analyzer 52 arranged in series;

[0058] The first flue gas analysis branch is connected to the third branch of the heating and waste heat recovery system 2;

[0059] The second flue gas analysis branch is connected to the fourth branch of the heating and waste heat recovery system 2 .

[0060] The gas supply module 6 includes a nitric oxide gas cylinder 61, a sulfur dioxide gas cylinder 62 and an ammonia gas cylinder 63. Specifically, the ammonia gas cylinder 63 is used to configure the reducing agent with the required ammonia nitrogen ratio. The gas outlet of the gas supply module 6 includes the output ends of the nitric oxide gas cylinder 61, the sulfur dioxide gas cylinder 62 and the ammonia gas cylinder 63, and the output ends thereof correspond to the first gas supply branch, the second gas supply branch and the third gas supply branch connected to the gas distribution module 4, respectively. The existing catalyst detection system needs to be tested in the laboratory, and the main component of the gas used is nitrogen, which simulates the real flue gas on site. The system uses the real flue gas on site for testing to obtain the component parameters of the real flue gas. According to the parameters, the simulated flue gas is obtained in the gas distribution module 4 and the gas supply module 6, which can more truly reflect the catalyst performance under the actual flue gas conditions.

[0061] The present invention provides a denitration catalyst performance mobile test method, comprising the following steps:

[0062] Sequentially and sealedly connected are a flue gas sampling module 1, a flue gas heating and waste heat recovery module 2, a catalyst detection module 3, a gas distribution module 4, a gas supply module 6 and a flue gas analysis module 5, forming a flue gas circuit;

[0063] The real flue gas enters the inlet pipe of the flue gas sampling module 1 and passes through the flue gas heating and waste heat recovery module 2 and the terminal catalyst detection module 3 in sequence, and is finally discharged through the loop pipe of the flue gas sampling module 1;

[0064] The flue gas analysis module 5 measures the catalytic performance data of the real flue gas, and adjusts the simulated flue gas of the gas distribution module 4 according to the data. Specifically, the concentration of some substances in the collected real flue gas may not reach the concentration required for the test, so it is necessary to adjust the concentration of some substances according to the gas supply module to meet the test requirements. Therefore, the main purpose of simulating flue gas is to make the flue gas composition meet the test requirements;

[0065] The simulated flue gas is cooled by the heat exchanger 21, stirred and mixed by the first mixer 22 and the second mixer 23, and heated by the flue gas heater 24 in the inlet pipe of the flue gas heating and waste heat recovery module 2. The flue gas analysis module 5 analyzes the simulated flue gas and discharges it to the catalyst detection module 3 to obtain multiple sets of catalytic performance data.

[0066] The multiple groups of catalytic performance data are different data obtained by connecting multiple catalyst detection modules 3.

[0067] Through the above scheme, the catalyst detection platform can be integrated into several modules, which can be tested after being assembled on site. After the test is completed or the research is finished, each module can be transported separately to the next site for continued use. This overcomes the problem that sampling detection can only be carried out when the unit is shut down, and needs to be coordinated with the power plant maintenance time and plan, resulting in a waste of time and great limitations, and extremely poor convenience; the investment in building an on-site test platform is high, and the equipment cannot be moved, which easily leads to the problem of waste of investment.

Claims

1. A mobile test system for denitration catalyst performance, characterized in that: It comprises a flue gas sampling module (1), a flue gas heating and waste heat recovery module (2), a catalyst detection module (3), a gas distribution module (4), a gas supply module (6) and a flue gas analysis module (5), which are all separately arranged; The flue gas sampling module (1), the flue gas heating and waste heat recovery module (2) and the catalyst detection module (3) are all provided with inlet pipes and loop pipes in parallel; The flue gas heating and waste heat recovery module (2) comprises a heat exchanger (21) and a first mixer (22), a second mixer (23) and a flue gas heater (24) which are sequentially connected to the inlet pipe therein; the hot end of the heat exchanger (21) is connected to the inlet pipe upstream of the first mixer (22), and the cold end is connected to the loop pipe of the flue gas heating and waste heat recovery module (2); At least one catalyst detection module (3) is cascaded to the inlet pipeline and the loop pipeline of the flue gas heating and waste heat recovery module (2) through the inlet pipeline and the loop pipeline; the free ends of the inlet pipeline and the loop pipeline of the final stage catalyst detection module (3) are connected to form a flue gas loop; The inlet pipeline of the flue gas heating and waste heat recovery module (2) is respectively provided with a first branch, a second branch and a third branch, and the loop pipeline is provided with a fourth branch; the first branch is provided at the input end side of the heat exchanger (21), the second branch is provided between the first mixer (22) and the second mixer (23), the third branch is provided at the output end side of the second mixer (23), and the fourth branch is provided at a position corresponding to the third branch on the loop pipeline; The first branch and the second branch are respectively connected to the gas outlet end of the gas distribution module (4), and the third branch and the fourth branch are respectively connected to the sampling end of the flue gas analysis module (5); The air inlet end of the air distribution module (4) is connected to the air outlet end of the air supply module (6); The flue gas sampling module (1), the flue gas heating and waste heat recovery module (2), the catalyst detection module (3), the air distribution module (4), the air supply module (6) and the flue gas analysis module (5) all include a module frame for providing an installation position; The gas outlet end of the gas distribution module (4) comprises a first gas supply branch, a second gas supply branch and a third gas supply branch which are arranged in parallel; The first gas supply branch and the second gas supply branch are connected to the first branch of the flue gas heating and waste heat recovery module (2), and the third gas supply branch is connected to the second branch of the flue gas heating and waste heat recovery module (2); The first gas supply branch, the second gas supply branch and the third gas supply branch are respectively provided with corresponding flow meters (41) and valves (42); The gas supply module (6) comprises a nitric oxide gas cylinder (61), a sulfur dioxide gas cylinder (62) and an ammonia gas cylinder (63). The gas outlet end of the gas supply module (6) comprises output ends of a nitric oxide gas cylinder (61), a sulfur dioxide gas cylinder (62) and an ammonia gas cylinder (63), and the output ends are respectively connected to a first gas supply branch, a second gas supply branch and a third gas supply branch of the gas distribution module (4) in sequence; The sampling end of the flue gas analysis module (5) comprises a first flue gas analysis branch and a second flue gas analysis branch arranged in parallel; The first flue gas analysis branch and the second flue gas analysis branch respectively comprise a flue gas pretreatment device (51) and a flue gas analyzer (52) arranged in series; The first flue gas analysis branch is connected to the third branch of the flue gas heating and waste heat recovery module (2); The second flue gas analysis branch is connected to the fourth branch of the flue gas heating and waste heat recovery module (2).

2. A denitration catalyst performance mobile test system according to claim 1, characterized in that: The smoke sampling module (1) comprises a filter (11), a smoke sampling temperature sensor (13) and a smoke sampling pressure sensor (12) which are sequentially arranged on an inner inlet pipe thereof; The smoke sampling module (1) also includes a suction fan (14), a smoke exhaust temperature sensor (16), and a smoke exhaust pressure sensor (15) which are sequentially arranged on the inner loop pipeline thereof.

3. A denitration catalyst performance mobile test system according to claim 1, characterized in that: The hot fluid in the heat exchanger (21) is the hot flue gas in the inlet pipeline, and the cold fluid is the cold flue gas in the loop pipeline.

4. A denitration catalyst performance mobile test system according to claim 1, characterized in that: The catalyst detection module (3) comprises a catalyst detection box (31), a catalyst detection temperature sensor (33) and a catalyst detection pressure sensor (32) which are sequentially arranged on the inner inlet pipeline.

5. A mobile test method for denitration catalyst performance, characterized in that: Based on any one of claims 1-4, the mobile test system for denitration catalyst performance comprises the following steps: Sequentially and hermetically connecting a separately arranged flue gas sampling module (1), a flue gas heating and waste heat recovery module (2), a catalyst detection module (3), a gas distribution module (4), a gas supply module (6), and a flue gas analysis module (5) to form a flue gas loop; The real flue gas enters the inlet pipe of the flue gas sampling module (1) and passes through the flue gas heating and waste heat recovery module (2) and the catalyst detection module (3) in sequence, and is discharged through the loop pipe of the flue gas sampling module (1); The flue gas analysis module (5) measures the catalytic performance data of the real flue gas, and adjusts the gas distribution module (4) according to the data to obtain the simulated flue gas; The simulated flue gas is cooled in sequence by a heat exchanger (21), mixed by a first mixer (22) and a second mixer (23), and heated by a flue gas heater (24) on the inlet pipe of the flue gas heating and waste heat recovery module (2). The simulated flue gas is analyzed by a flue gas analysis module (5) and discharged to a catalyst detection module (3) to obtain multiple sets of catalytic performance data. The multiple sets of catalytic performance data are different data obtained through different connection modes of several levels of catalyst detection modules (3).

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