CN216978771U - Anti erosion-corrosion in-situ test system for boiler heating surface - Google Patents
Anti erosion-corrosion in-situ test system for boiler heating surface Download PDFInfo
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- CN216978771U CN216978771U CN202123359625.1U CN202123359625U CN216978771U CN 216978771 U CN216978771 U CN 216978771U CN 202123359625 U CN202123359625 U CN 202123359625U CN 216978771 U CN216978771 U CN 216978771U
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Abstract
The utility model provides an erosion-corrosion resistance in-situ test system for a heating surface of a boiler, belonging to the field of test equipment, and the system comprises a combustion simulation device and an erosion-corrosion test device, wherein: the combustion simulation device comprises a feeding unit, a combustor and a combustion chamber which are sequentially connected from top to bottom; meanwhile, a combustion area electric heater and a sample area electric heater are arranged outside the combustion chamber; the erosion-corrosion device comprises an ash corrosion platform, a circulating water temperature control unit and a camera, wherein the ash corrosion platform extends into the combustion chamber; the circulating water temperature control unit is connected with the ash corrosion platform; the camera is arranged on the outer side of the combustion chamber visual window. The utility model can simulate the whole process of fuel ignition, combustion, fly ash impact, fly ash deposition and adhesion and corrosion reaction in the minimum space, realize the rapid evaluation of the erosion-corrosion resistance of the material under the complex coupling corrosion condition, and provide guidance for the optimization of corrosion-resistant materials at different parts in the boiler.
Description
Technical Field
The utility model belongs to the field of test equipment, and particularly relates to an anti-erosion-corrosion in-situ test system for a boiler heating surface.
Background
The combustion of solid fuel is the main mode of thermal power generation, and the fuel types include coal, biomass, solid waste and other solid combustible substances which can generate heat energy or power. With the increasing energy demand in China, high-sodium coal in Xinjiang, high-sulfur coal in southwest, biomass and solid waste are also widely used for combustion power generation. However, these fuels contain varying amounts of sodium, potassium, sulfur, and chlorine, which can cause erosion-corrosion problems on boiler heat exchange surfaces during combustion. Erosion refers to the process of hard particles having a velocity that contact the surface of a material and create an impact that results in the loss of the material. The high-temperature corrosion mainly refers to the phenomenon that the metal material is oxidized and corroded under the high-temperature condition, so that the metal material is lost. A part of the fly ash particles generated in the combustion process of the solid fuel is carried by high-temperature flue gas to wash heat exchange tube bundles on a heating surface of the boiler at a higher speed, so that heat exchange tubes are continuously consumed; the rest of the corrosion liquid adheres to and deposits on the surface of the heat exchange tube under the action of vortex, thermophoresis and inertial impaction, forms a molten substance at high temperature and corrodes the heat exchange tube, and is called as deposition phase corrosion. Besides, the flue gas generated by fuel combustion contains HCl and SO2Such corrosive gases also cause corrosive effects on the heat exchange tube material, and are referred to as vapor phase corrosion. It is worth noting that the deposition phase corrosion and the gas phase corrosion exist simultaneously under the actual service environment in the furnace, and gas-solid coupling corrosion is generated. While the tube bundle of the heating surface is flownThe erosion-corrosion coupling effect of ash and flue gas, the damage of erosion to the surface structure of the tube bundle of the heating surface of the boiler can intensify the ash deposition corrosion process, and the effect of corrosion to the surface roughness of the tube bundle can also influence the erosion process of fly ash. The damage of the coupling effect on the tube bundle is more serious than single erosion or corrosion, the problems of tube explosion and the like can be caused, and the safety and the economy of power production are greatly influenced.
The application of the coating technology or the novel material on the surface of the heat exchange tube of the boiler can effectively improve the erosion-corrosion resistance of the heat exchange tube of the heating surface of the boiler, prolong the service life of the boiler and have very wide application prospect. For the purpose of optimizing coatings and novel materials, it is necessary to test the erosion-corrosion resistance of the applied coatings and novel materials. However, the performance test period of the test material in the field environment is long, the economic cost is high, and the practicability is poor, so that it is very important to realize the rapid and accurate evaluation of the material performance in a laboratory. As mentioned above, in an actual furnace, the service environment of the heat exchange surface pipe is more complex and severe, and besides the deposit phase corrosion of the pipe wall, HCl and SO in the flue gas2The corrosive gas can also corrode the pipe wall, and meanwhile, the collision between the fly ash particles flowing at high speed in the flue gas and the heated surface can cause the erosion damage of the pipe wall. In order to improve the accuracy and reliability of a test result and achieve the purpose of providing guidance for field application, a test device for simulating the erosion of fuel fly ash to a heating surface and the flue gas coupling corrosion in situ is set up, and it is necessary to rapidly evaluate the erosion-corrosion resistance of a material to be tested.
In the prior art, tests in the corrosion field are studied to different degrees, and CN111323364A discloses a thermal corrosion test device and a thermal corrosion test method for homogenized deposited salt. CN106769822A discloses a high temperature corrosion test system, which utilizes a cyclone gas mixing tank and water vapor to explore a system for corrosion resistance of materials in the presence of only corrosive gas and high temperature water vapor. The above studies have generally used pure substances as corrosion media and have conducted material tests under single corrosion conditions. Further, CN209878565U discloses a hot corrosion resistance test device for heat-resistant materials under combustion atmosphere, which simulates the corrosion conditions in the real atmosphere by using the flue gas generated by the combustion of a burner, wherein the test sample is connected into a hollow tube shape by welding, the flue gas flows through the interior, and the temperature of the sample is controlled by flowing cooling medium through the exterior; however, this test apparatus cannot control the sufficient combustion of the fuel and the temperature of the flue gas, and cannot evaluate the erosion resistance of the material. Some researchers have studied the erosion-corrosion test device, for example, CN109856036A discloses a high-temperature high-pressure gas, liquid, solid three-phase erosion-corrosion test device and method, CN112284953A discloses a multielement medium erosion-erosion coupling test device under the ocean temperature-changing simulation environment, with a view to studying the erosion-corrosion coupling resistance of the material under the ocean temperature-changing simulation environment in the salt spray atmosphere, and CN103149144A provides a test device and method for the high-temperature erosion-corrosion performance of the oil well pipe column, and the erosion medium is sand. The test device is mainly applied to marine environment or oil field environment, and lacks of an erosion-corrosion coupling test device which can be applied to a boiler.
In summary, the following problems mainly exist in the prior application or issued patent:
the corrosion type is electrochemical corrosion, the corrosion temperature cannot reach the pipe wall temperature of a heat exchange surface in an actual furnace, the whole process from ignition, combustion, flying ash impact, flying ash deposition to corrosion cannot be simulated in situ, and the erosion-corrosion resistance performance of the material to be tested cannot be rapidly evaluated;
the corrosion medium mostly adopts pure substances such as salt solution and the like, has great difference with the actual fuel fly ash, is single, or only simulates the corrosion of a single-phase corrosion medium, and cannot reasonably predict the erosion-corrosion resistance of the material under the complex coupling corrosion condition;
the dynamic process research of fly ash particles depositing on the surface of the sample and generating corrosion reaction is lacked, the temperature of the sample cannot be quickly and accurately adjusted under the condition that the temperature of the sample generates large fluctuation, and huge deviation of the evaluation result of the erosion-corrosion performance of the sample to be tested is caused.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model aims to provide an anti-erosion-corrosion in-situ test system for a heating surface of a boiler, and aims to solve the problem that the existing test system cannot simulate the anti-erosion-corrosion performance of each position in the boiler.
In order to achieve the purpose, the utility model provides an anti-erosion-corrosion in-situ test system for a heating surface of a boiler, which comprises a combustion simulation device and an erosion-corrosion test device, wherein:
the combustion simulation device comprises a feeding unit, a combustor and a combustion chamber which are sequentially connected from top to bottom so as to simulate the flue gas environment in the actual combustion process; meanwhile, a combustion area electric heater and a sample area electric heater are sequentially arranged outside the combustion chamber from top to bottom and used for separately heating the smoke and the sample to be tested, and a visible window is arranged below the combustion chamber;
the erosion-corrosion test device comprises an ash corrosion platform, a circulating water temperature control unit and a camera, wherein the ash corrosion platform extends into the combustion chamber and is used for placing a sample to be tested and carrying out an erosion-corrosion test; the circulating water temperature control unit is connected with the ash corrosion platform to control the temperature of the sample to be tested; the camera is arranged on the outer side of the visible window of the combustion chamber to observe the erosion-corrosion process of the sample to be detected in real time.
As a further preference, the feeding unit comprises a solid fuel feeding hopper, a solid fuel feeding pipe and a combustion gas inlet pipe, wherein the solid fuel feeding hopper is connected with the solid fuel feeding pipe and is used for introducing solid fuel or fly ash into the combustor; the combustion gas inlet pipe is used for introducing combustion gas or flue gas into the combustor.
As a further preference, the solid fuel feed hopper comprises a material heater for preheating the solid fuel or fly ash and a feed motor for controlling the feed rate of the solid fuel or fly ash.
As a further preferred, the feed unit further comprises a first corrosive gas inlet pipe for introducing corrosive gas into the combustion chamber.
Preferably, the system for in-situ testing erosion-corrosion resistance of the heated surface of the boiler further comprises a reinforced corrosion gas distribution unit, wherein the reinforced corrosion gas distribution unit comprises a second corrosive gas inlet pipe and a corrosive gas flowmeter, and the second corrosive gas inlet pipe is connected with the combustion chamber and is used for quantitatively introducing corrosive gas so as to further reinforce a corrosion environment; the corrosive gas flowmeter is used for controlling the opening of the second corrosive gas inlet pipe so as to adjust the flow of the corrosive gas.
Preferably, the ash corrosion platform comprises a sample table, a sample fixing piece, a sample temperature control couple, a cooling water inlet and a cooling water outlet, wherein the sample table and the sample fixing piece interact with each other to fix a sample to be tested, and the angle of the sample to be tested is adjusted by using the sample table; the sample temperature control galvanic couple is arranged on the sample table and is used for measuring the temperature of the sample to be measured; and the cooling water inlet and the cooling water outlet are arranged on two sides of the sample table and are connected with the circulating water temperature control unit so as to cool the sample to be tested in a water cooling mode.
Preferably, the in-situ test system for erosion resistance and corrosion resistance of the heating surface of the boiler further comprises a flue gas analyzer, wherein the flue gas analyzer extends into the combustion chamber and is used for monitoring flue gas components in real time.
Preferably, the circulating water temperature control unit comprises a water inlet pipe, a circulating water flowmeter, an electric regulating valve, a circulating water pump, a water tank and a water outlet pipe which are sequentially connected along the water flow direction, and the water inlet pipe and the water outlet pipe are directly connected with the ash corrosion platform; the circulating water flow meter and the electric regulating valve are used for controlling the flow rate of circulating water; the circulating water pump is used for pumping water from the water tank so as to provide circulating water for the circulating water temperature control unit.
Preferably, the in-situ test system for erosion-corrosion resistance of the heated surface of the boiler further comprises a computer, and the computer is used for controlling the feeding unit, the combustion area electric heater, the sample area electric heater, the circulating water temperature control unit and the camera.
More preferably, the height of the combustion chamber is 0.6m to 6 m; the maximum heating temperature of the combustion area electric heater is 1600 ℃, and the maximum heating temperature of the sample area electric heater is 900 ℃.
Generally, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects:
1. the system for the erosion-corrosion resistance in-situ test of the heating surface of the boiler has stronger operability, can simulate the whole process of fuel ignition, combustion, flying ash impact, flying ash deposition, adhesion and corrosion reaction by using the minimum space, realizes the rapid evaluation of the erosion-corrosion resistance of the material under the complex coupling corrosion condition, is very suitable for the erosion-corrosion resistance test of the material with the coupling of gas phase corrosion and deposition phase corrosion under the high-temperature environment, can separately heat the smoke and the sample to be tested by arranging the electric heater in the combustion area, ensures that the fuel is completely combusted and burned out, creates conditions for the deposition of subsequent ash particles on the surface of the sample to be tested, can independently regulate and control the temperature of the sample to be tested by arranging the electric heater in the sample area and the circulating water temperature control unit, and realizes the simulation of the high-temperature heating surface and the tail flue in the boiler, the test system is also provided with a visual window and a camera, can dynamically record the whole process of deposition, adhesion, fusion and corrosion of fuel ash particles and determine the size of an ash wetting angle, and provides a basis for evaluating the erosion-corrosion resistance of the material;
2. meanwhile, the structure of the feeding unit is optimized, and the solid fuel feeding hopper, the solid fuel feeding pipe, the combustion gas inlet pipe and the first corrosive gas inlet pipe are combined, so that on one hand, the flue gas environment under actual combustion can be simulated through solid fuel combustion, on the other hand, the flue gas environment can also be directly simulated through introducing flue gas, fly ash and corrosive gas, and the feeding device has a wide application range;
3. in addition, by arranging the first corrosive gas inlet pipe, the second corrosive gas inlet pipe and the flue gas analyzer, the corrosive gas can be introduced according to experimental requirements to simulate a special application environment or an intensified corrosive environment, so that the rapid evaluation on the erosion resistant machine flue gas fly ash coupling corrosion performance of the sample to be tested is realized, and meanwhile, guidance is provided for the optimization of erosion resistant and flue gas fly ash coupling corrosion resistant materials.
Drawings
FIG. 1 is a schematic structural diagram of an in-situ test system for erosion-corrosion resistance of a heated surface of a boiler, provided by an embodiment of the utility model;
fig. 2 is a schematic structural diagram of an ash erosion platform suitable for a flat plate type test sample to be tested, provided in an embodiment of the present invention, where (a) is a front view, (b) is a side view, and (c) is a top view;
fig. 3 is a schematic structural diagram of an ash erosion platform suitable for a cylindrical sample to be tested, provided in an embodiment of the present invention, where (a) is a front view, (b) is a side view, and (c) is a top view;
FIG. 4 is a schematic diagram of a solid fuel feed hopper according to an embodiment of the present invention;
FIG. 5 is a flow chart of an in-situ testing system for erosion-corrosion resistance of a heated surface of a boiler, according to an embodiment of the present invention.
The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein:
1-solid fuel feed hopper, 111-feed motor, 112-material heater, 2-solid fuel feed pipe, 3-combustion gas inlet pipe, 4-first corrosive gas inlet pipe, 5-burner, 6-top flange, 7-combustion chamber, 8-two-stage electric heating unit, 81-combustion area electric heater, 82-sample area electric heater, 9-intensified corrosion gas distribution unit, 91-corrosive gas flowmeter, 92-second corrosive gas inlet pipe, 10-ash corrosion platform, 101-sample to be tested, 102-sample platform, 103-sample temperature control couple, 104-cooling water inlet, 105-cooling water outlet, 106-sample fixing piece, 11-bottom flange, 12-camera, 13-flue gas analyzer, 14-circulating water temperature control unit, 141-water inlet pipe, 142-circulating water flowmeter, 143-electric regulating valve, 144-circulating water pump, 145-water tank, 146-water outlet pipe and 15-computer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
As shown in FIG. 1, the utility model provides an erosion-corrosion resistance in-situ test system for a heating surface of a boiler, which comprises a combustion simulation device and an erosion-corrosion test device, wherein:
the combustion simulation device comprises a feeding unit, a combustor 5, a top end flange 6, a combustion chamber 7 and a bottom end flange 11 which are sequentially connected from top to bottom so as to simulate the flue gas environment in the actual combustion process; meanwhile, two stages of electric heating units 8 are arranged outside the combustion chamber 7, namely a combustion area electric heater 81 and a sample area electric heater 82 which are used for separately heating the smoke and the sample 101 to be tested, the highest heating temperature of the combustion area electric heater 81 can reach 1600 ℃, further combustion and burnout of fuel can be guaranteed, conditions are created for deposition of subsequent ash particles on the surface of the sample to be tested, the highest heating temperature of the sample area electric heater 82 can reach 900 ℃, simulation of a high-temperature heating surface and a tail flue in the boiler can be realized, and a visible window is arranged below the combustion chamber 7 so as to realize real-time observation of the sample 101 to be tested;
the erosion-corrosion test device comprises an ash corrosion platform 10, a circulating water temperature control unit 14, a flue gas analyzer 13 and a camera 12, wherein the ash corrosion platform 10 extends into the combustion chamber 7 and is used for placing a sample 101 to be tested and carrying out an erosion-corrosion test; the circulating water temperature control unit 14 is connected with the ash corrosion platform 10 to control the temperature of the sample 101 to be tested, and the temperature of the sample 101 to be tested can be controlled within 100-750 ℃ through the interaction of the sample area electric heater 82 and the circulating water temperature control unit 14, so that the temperature of different parts in the boiler can be simulated to provide guidance for the optimization of the corrosion-resistant material; the flue gas analyzer 13 extends into the combustion chamber 7 and is used for monitoring flue gas components in real time, so that the accuracy of an anti-erosion-corrosion in-situ test of the heating surface of the boiler is further improved; the camera 12 is arranged outside the visible window in the combustion chamber 7 to observe the erosion-corrosion process of the sample 101 to be tested in real time, and the camera 12 preferably adopts a CCD camera and can dynamically record the whole process of deposition, adhesion, fusion and corrosion of fuel ash particles so as to determine the size of an ash wetting angle, thereby providing a basis for evaluating the erosion-corrosion resistance of the material.
Further, as shown in fig. 4, the feeding unit comprises a solid fuel feeding hopper 1, a solid fuel feeding pipe 2, a combustion gas feeding pipe 3 and a first corrosive gas feeding pipe 4, the solid fuel feeding hopper 1 is connected with the solid fuel feeding pipe 2 and is used for feeding solid fuel or fly ash to the burner 5, the solid fuel feeding hopper 1 comprises a material heater 112 and a feeding motor 111, the material heater 112 is used for preheating the solid fuel or fly ash, and the feeding motor 111 is used for controlling the feeding rate of the solid fuel or fly ash; the combustion gas inlet pipe 3 is used for introducing combustion gas or flue gas into the combustor 5; the first corrosive gas inlet pipe 4 is used for introducing corrosive gas into the combustion chamber 7. During operation, solid fuel and combustion gas can be introduced to simulate an actual combustion environment, fly ash and flue gas can be directly introduced to simulate an actual combustion environment, and meanwhile, corrosive gas can be introduced to simulate a corrosion process.
Further, the system for the erosion-corrosion resistance in-situ test of the heating surface of the boiler further comprises an intensified corrosion gas distribution unit 9, which is used for realizing the rapid evaluation of the erosion resistance of the sample 101 to be tested and the coupling corrosion performance of the flue gas and the fly ash, wherein the intensified corrosion gas distribution unit 9 comprises a second corrosive gas inlet pipe 92 and a corrosive gas flowmeter 91, and the second corrosive gas inlet pipe 92 is connected with the combustion chamber 7 and is used for quantitatively introducing corrosive gas so as to further intensify the corrosion environment; the corrosive gas flow meter 91 is used to control the opening degree of the second corrosive gas intake pipe 92 to adjust the flow rate of the corrosive gas.
Further, as shown in fig. 2 and 3, the ash corrosion platform 10 includes a sample table 102, a sample fixing member 106, a sample temperature control couple 103, a cooling water inlet 104 and a cooling water outlet 105, the sample table 102 and the sample fixing member 106 interact with each other to fix the sample 101 to be tested, and the sample table 102 is used to adjust the angle of the sample 101 to be tested, so as to change the included angle between the surface of the sample 101 to be tested and the flue gas, and realize rapid evaluation of the corrosion resistance of the material under different erosion angles; the sample temperature control couple 103 is arranged on the sample table 102 and is used for accurately measuring the temperature of the sample 101 to be measured; the cooling water inlet 104 and the cooling water outlet 105 are disposed on both sides of the sample stage 102, and are connected to the circulating water temperature control unit 14 to cool the sample 101 to be measured by water cooling. When the sample 101 to be tested is of a flat plate structure, the cooling water inlet 104 and the cooling water outlet 105 are arranged below the sample table 102, and the cooling water cools the sample table 102 in a circulating flow manner; when the sample 101 to be measured is a tubular structure, the cooling water inlet 104 and the cooling water outlet 105 are connected to two sides of the tubular structure, and the cooling water cools the sample 101 to be measured in a circulating flow manner.
Further, the circulating water temperature control unit 14 includes a water inlet pipe 141, a circulating water flowmeter 142, an electric regulating valve 143, a circulating water pump 144, a water tank 145 and a water outlet pipe 146 which are connected in sequence along the water flow direction, and the water inlet pipe 141 and the water outlet pipe 146 are directly connected with the ash corrosion platform 10; the circulating water flow meter 142 and the electric control valve 143 are used for controlling the flow rate of the circulating water; the circulating water pump 144 is used to pump water from the water tank 145 to provide circulating water for the circulating water temperature control unit 14.
Further, the in-situ test system for erosion resistance and corrosion resistance of the heated surface of the boiler further comprises a computer 15, which is used for controlling the feeding unit, the combustion area electric heater 81, the sample area electric heater 82, the circulating water temperature control unit 14 and the camera 12, and comprises the feeding speed of the feeding motor 111, the preheating temperature of the fuel, the flue gas temperature and the temperature of the sample to be tested, the flow rates of the combustion gas, the first corrosive gas and the second corrosive gas, the recording and analyzing process of the camera 12 and the like.
Further, the height of the combustion chamber 7 is 0.6m to 6 m; the maximum heating temperature of the combustion zone electric heater 81 was 1600 ℃ and the maximum heating temperature of the sample zone electric heater 82 was 900 ℃. The solid fuel can adopt one or more of coal, biomass, solid renewable fuel and refuse derived fuel; the combustion gas may adopt CH4、C2H4And H2One or more of them, and a combustion improver such as O2Or air; the corrosive gas can be HCl or SO2、SO3And H2One or more of S.
As shown in FIG. 5, the application method of the system for in-situ testing erosion-corrosion resistance of the heating surface of the boiler provided by the utility model comprises the following steps:
s1, weighing a certain amount of solid fuel, putting the solid fuel into the solid fuel feed hopper 1, fixing the sample 101 to be tested on the ash corrosion platform 10, and adjusting the angle of the sample 101 to be tested through the sample platform 102;
s2 setting the heating temperatures of the combustion area electric heater 81 and the sample area electric heater 82, and setting the temperature of the test sample 101 to be measured;
s3, starting the circulating water pump 144 and the heating switch of the circulating water temperature control unit 14;
s4 communicating the combustion gas intake pipe 3, the first corrosive gas intake pipe 4, and the second corrosive gas intake pipe 92;
s5 starting the feeding motor 111 to burn the solid fuel, carrying out erosion-corrosion test on the sample 101 to be tested, dynamically recording the whole process of deposition and corrosion of fuel ash particles by using the camera 12, and determining the size of an ash wetting angle after being analyzed by the computer 15;
s6 after the test is completed, the modules are closed in sequence and the sample is taken out.
It will be readily understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the utility model, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The anti erosion-corrosion in-situ test system for the heating surface of the boiler is characterized by comprising a combustion simulation device and an erosion-corrosion test device, wherein:
the combustion simulation device comprises a feeding unit, a combustor (5) and a combustion chamber (7) which are sequentially connected from top to bottom so as to simulate the flue gas environment in the actual combustion process; meanwhile, a combustion area electric heater (81) and a sample area electric heater (82) are sequentially arranged outside the combustion chamber (7) from top to bottom and used for separately heating smoke and a sample (101) to be tested, and a visible window is arranged below the combustion chamber (7);
the erosion-corrosion test device comprises an ash corrosion platform (10), a circulating water temperature control unit (14) and a camera (12), wherein the ash corrosion platform (10) extends into the combustion chamber (7) and is used for placing a sample (101) to be tested and carrying out an erosion-corrosion test; the circulating water temperature control unit (14) is connected with the ash corrosion platform (10) to control the temperature of the sample (101) to be tested; the camera (12) is arranged on the outer side of a visible window of the combustion chamber (7) to observe the erosion-corrosion process of the sample (101) to be measured in real time.
2. The system for in-situ testing erosion-corrosion resistance of the heating surface of the boiler as claimed in claim 1, wherein the feeding unit comprises a solid fuel feeding hopper (1), a solid fuel feeding pipe (2) and a combustion gas inlet pipe (3), the solid fuel feeding hopper (1) is connected with the solid fuel feeding pipe (2) and is used for feeding solid fuel or fly ash to the combustor (5); the combustion gas inlet pipe (3) is used for introducing combustion gas or smoke into the combustor (5).
3. The system for in-situ testing erosion-corrosion resistance of the heating surface of the boiler as claimed in claim 2, wherein the solid fuel feed hopper (1) comprises a material heater (112) and a feed motor (111), the material heater (112) is used for preheating the solid fuel or the fly ash, and the feed motor (111) is used for controlling the feed rate of the solid fuel or the fly ash.
4. The in-situ test system for erosion-corrosion resistance of the heating surface of the boiler as set forth in claim 1, wherein the feeding unit further comprises a first corrosive gas feeding pipe (4) for feeding a corrosive gas into the combustion chamber (7).
5. The system for in-situ testing erosion-corrosion resistance of the heating surface of the boiler as set forth in claim 1, characterized in that the system for in-situ testing erosion-corrosion resistance of the heating surface of the boiler further comprises an intensified corrosion gas distribution unit (9), the intensified corrosion gas distribution unit (9) comprises a second corrosive gas inlet pipe (92) and a corrosive gas flowmeter (91), the second corrosive gas inlet pipe (92) is connected with the combustion chamber (7) and is used for quantitatively introducing corrosive gas so as to further intensify a corrosive environment; the corrosive gas flowmeter (91) is used for controlling the opening degree of a second corrosive gas inlet pipe (92) so as to adjust the flow of the corrosive gas.
6. The in-situ test system for resisting erosion-corrosion of the heating surface of the boiler as claimed in claim 1, wherein the ash corrosion platform (10) comprises a sample table (102), a sample fixing member (106), a sample temperature control galvanic couple (103), a cooling water inlet (104) and a cooling water outlet (105), the sample table (102) and the sample fixing member (106) interact to fix the sample (101) to be tested, and the sample table (102) is used for adjusting the angle of the sample (101) to be tested; the sample temperature control electric couple (103) is arranged on the sample table (102) and is used for measuring the temperature of the sample (101) to be measured; the cooling water inlet (104) and the cooling water outlet (105) are arranged on two sides of the sample table (102) and are connected with the circulating water temperature control unit (14) so as to cool the sample (101) to be tested in a water cooling mode.
7. The in-situ test system for the erosion resistance and the corrosion resistance of the heating surface of the boiler as set forth in claim 1, characterized in that the in-situ test system for the erosion resistance and the corrosion resistance of the heating surface of the boiler further comprises a flue gas analyzer (13), and the flue gas analyzer (13) extends into the combustion chamber (7) and is used for monitoring the components of the flue gas in real time.
8. The in-situ test system for the erosion-corrosion resistance of the heating surface of the boiler as claimed in claim 1, wherein the circulating water temperature control unit (14) comprises a water inlet pipe (141), a circulating water flow meter (142), an electric regulating valve (143), a circulating water pump (144), a water tank (145) and a water outlet pipe (146) which are connected in sequence along the water flow direction, and the water inlet pipe (141) and the water outlet pipe (146) are directly connected with the ash corrosion platform (10); the circulating water flow meter (142) and the electric regulating valve (143) are used for controlling the flow rate of circulating water; the circulating water pump (144) is used for pumping water from the water tank (145) to provide circulating water for the circulating water temperature control unit (14).
9. The in-situ test system for resisting erosion-corrosion of the heating surface of the boiler as set forth in claim 1, characterized in that the in-situ test system for resisting erosion-corrosion of the heating surface of the boiler further comprises a computer (15), and the computer (15) is used for controlling the feeding unit, the combustion area electric heater (81), the sample area electric heater (82), the circulating water temperature control unit (14) and the camera (12).
10. The in-situ test system for erosion-corrosion resistance of the heating surface of the boiler as set forth in any one of claims 1 to 9, wherein the height of the combustion chamber (7) is 0.6m to 6 m; the highest heating temperature of the combustion area electric heater (81) is 1600 ℃, and the highest heating temperature of the sample area electric heater (82) is 900 ℃.
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| CN202123359625.1U CN216978771U (en) | 2021-12-28 | 2021-12-28 | Anti erosion-corrosion in-situ test system for boiler heating surface |
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| CN202123359625.1U CN216978771U (en) | 2021-12-28 | 2021-12-28 | Anti erosion-corrosion in-situ test system for boiler heating surface |
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