Fluidized bed combustion furnace high-temperature corrosion experimental device

Abstract

The utility model relates to the technical field of combustion experiment equipment, in particular to a high-temperature corrosion experiment device for a fluidized bed combustion furnace. A furnace tube insulating layer is arranged on the periphery of a vertical furnace tube, an auxiliary heating wire is wound on the furnace tube and located between the furnace tube and the furnace tube insulating layer, an upper cover flange and an air supply tube are arranged at the upper end and the lower end of the furnace tube respectively, an upper cover insulating layer is arranged at the top of the upper cover flange, a quartz sand layer is arranged at the bottom of an inner cavity of the furnace tube, and a bottom plate flange is mounted at the lower end of the air supply tube; the middle part and the upper part of the inner cavity of the furnace tube are respectively provided with a horizontal 1 # sample hanging rod and a 2 # sample hanging rod; the lower part of the side surface of the furnace tube is provided with a spiral pulverized coal feeding tank communicated with the inner cavity of the furnace tube; the device can ensure the heat preservation and heating effects of the inner cavity of the furnace tube and improve the efficiency, and is used for simulating the high-temperature corrosion environment of a coal-fired power plant and realizing accurate regulation and control of parameters.

Description

TECHNICAL FIELD

[0001] The utility model relates to combustion experiment equipment technical field, concretely is a fluidized bed combustion furnace high temperature corrosion experimental device. BACKGROUND

[0002] The typical structure of fluidized bed combustion furnace includes material conveying system, combustion system, environmental control system, many components of fluidized bed combustion furnace are made of metal material, the combustion furnace actually has nearly thirty meters high, in order to cooperate the metal material of high temperature corrosion resistance, should hang the sample in the actual stove on site, and should do the high temperature corrosion test of metal material in laboratory with the reduced fluidized bed combustion furnace. UTILITY MODEL CONTENT

[0003] The utility model discloses a fluidized bed combustion furnace high temperature corrosion experimental device for simulating high temperature corrosion environment of coal-fired power plant and realizing parameter accurate control.

[0004] The utility model discloses a technical scheme:

[0005] A fluidized bed combustion furnace high temperature corrosion experimental device, the periphery of vertical furnace pipe is provided with furnace pipe heat preservation layer, and the auxiliary heating wire is wound on the furnace pipe and located between the furnace pipe and the furnace pipe heat preservation layer, the upper end and the lower end of the furnace pipe are provided with upper cover flange and air supply pipe respectively, the top of the upper cover flange is provided with upper cover heat preservation layer, the bottom of the inner chamber of the furnace pipe is provided with quartz sand layer, and the lower end of the air supply pipe is installed with bottom plate flange.

[0006] The fluidized bed combustion furnace high temperature corrosion experimental device, the upper part of the side of the furnace pipe is installed with the exhaust gas pipe that communicates with the inner chamber of the furnace pipe, and the outlet of the exhaust gas pipe is sequentially connected with the exhaust air return tee joint, the 1# adjustable opening gate valve and the exhaust gas four-way joint along the same horizontal axis direction, one of the exhaust gas four-way joint is communicated with the outlet of the 1# adjustable opening gate valve, and the other three of the exhaust gas four-way joint are respectively provided with the exhaust gas outlet, the four-way 1# flange and the four-way 2# flange, and the exhaust gas outlet leads to the smoke treatment device.

[0007] The fluidized bed combustion furnace high temperature corrosion experimental device, the other three of the exhaust gas four-way joint are respectively provided with the exhaust gas three-way joint, the four-way 1# flange and the four-way 2# flange, and the exhaust gas three-way joint leads to the smoke treatment device through the two exhaust gas outlets.

[0008] The vertical one-way outlet of the exhaust air return air tee joint is connected with the 2# adjustable opening gate valve, the return flue gas pipe, the air supply tee joint along the same vertical axis direction in sequence, one way of the air supply tee joint is communicated with the outlet of the return flue gas pipe, the other two ways of the air supply tee joint are connected with the air supply adjusting valve and the air supply pipe respectively, the inlet of the air supply adjusting valve is communicated with the air supply port, and the air supply port is connected with the air pump.

[0009] The fluidized bed combustion furnace high-temperature corrosion experimental device is provided with the 1# temperature measuring point on the exhaust air return air tee joint, and the 2# temperature measuring point on the return flue gas pipe.

[0010] The fluidized bed combustion furnace high-temperature corrosion experimental device is provided with the 1# temperature measuring point on the exhaust air return air tee joint, and the 2# temperature measuring point on the return flue gas pipe.

[0011] The advantages and beneficial effects of the utility model are:

[0012] 1, the utility model discloses a furnace tube adopts 310 stainless steel pipe, and the furnace tube is provided with a furnace tube heat preservation layer, and the auxiliary heating wire is wound on the furnace tube, the top of the upper cover flange is provided with an upper cover heat preservation layer, and the bottom of the furnace tube inner cavity is provided with a quartz sand layer communicated with the air supply pipe, so that the temperature of the furnace tube inner cavity can reach the heating effect of the actual combustion furnace and improve the efficiency.

[0013] 2, the quartz sand layer of the utility model is 1.2mm to 2mm coarse sand laid in the bottom layer, has uniform air permeability, and can also play the role of heat preservation and insulation.

[0014] 3, one way of the exhaust air return air tee joint is communicated with the exhaust flue gas pipe, and the other two ways of the exhaust air return air tee joint are connected with the 1# adjustable opening gate valve and the 2# adjustable opening gate valve respectively, the exhaust air and the return air are integrated, and the proportion of the exhaust air and the return air can be adjusted arbitrarily through the two gate valves. DRAWINGS

[0015] Figure 1 It is a structural schematic view of one embodiment of the utility model.

[0016] Figure 2 It is a structural schematic view of another embodiment of the utility model.

[0017] In the figure, 1, bottom plate flange; 2, air supply pipe; 3, quartz sand layer; 4, furnace tube heat preservation layer; 5, spiral coal powder feeding tank; 6, auxiliary heating wire; 7, 1# sample hanging rod; 8, furnace tube; 9, 2# sample hanging rod; 10, upper cover flange; 11, upper cover heat preservation layer; 12, flue gas discharge pipe; 13, 1# temperature measuring point; 14, air return tee; 15, 1# adjustable opening gate valve; 16, flue gas discharge port; 17, four-way 1# flange; 18, four-way 2# flange; 19, 2# adjustable opening gate valve; 20, 2# temperature measuring point; 21, flue gas return pipe; 22, air supply regulating valve; 23, air supply port; 24, air supply tee; 25, flue gas discharge four-way; 26, flue gas discharge tee. DETAILED DESCRIPTION

[0018] Hereinafter, the utility model is further elaborated in detail through examples and drawings.

[0019] Example 1

[0020] As Figure 1 shown in the utility model discloses a fluidized bed combustion furnace high-temperature corrosion experimental device mainly includes: bottom plate flange 1, air supply pipe 2, quartz sand layer 3, furnace tube heat preservation layer 4, spiral coal powder feeding tank 5, auxiliary heating wire 6, 1# sample hanging rod 7, furnace tube 8, 2# sample hanging rod 9, upper cover flange 10, upper cover heat preservation layer 11, flue gas discharge pipe 12, 1# temperature measuring point 13, air return tee 14, 1# adjustable opening gate valve 15, flue gas discharge port 16, four-way 1# flange 17, four-way 2# flange 18, 2# adjustable opening gate valve 19, 2# temperature measuring point 20, flue gas return pipe 21, air supply regulating valve 22, air supply port 23, air supply tee 24, flue gas discharge four-way 25, specific structure is as follows:

[0021] Furnace tube 8 adopts 310 stainless steel pipe, and the vertical furnace tube 8 is provided with furnace tube heat preservation layer 4 around, auxiliary heating wire 6 is wound on furnace tube 8 and is located between furnace tube 8 and furnace tube heat preservation layer 4, and the upper end and the lower end of furnace tube 8 are provided with upper cover flange 10 and air supply pipe 2 respectively, the top of upper cover flange 10 is provided with upper cover heat preservation layer 11, the bottom of the inner cavity of furnace tube 8 is provided with quartz sand layer 3 (such as: the coarse sand with the granularity of 1.2 millimeter to 2 millimeter is laid to the bottom), and the lower end of air supply pipe 2 is installed bottom plate flange 1;The middle and upper part of the inner cavity of furnace tube 8 are provided with horizontal 1# sample hanging rod 7 and 2# sample hanging rod 9 respectively, and the side of furnace tube 8 corresponding to 1# sample hanging rod 7 and 2# sample hanging rod 9 is provided with observation window respectively, and the lower part of the side of furnace tube 8 is installed spiral coal powder feeding tank 5 connected with the inner cavity of furnace tube 8.

[0022] A flue gas pipe 12 connected to the inner cavity of the furnace tube 8 is installed on the upper side of the furnace tube 8. The outlet of the flue gas pipe 12 is connected in sequence to the exhaust and return air tee 14, the No. 1 adjustable gate valve 15, and the flue gas four-way 25 along the same horizontal axis. One of the four-way flue 25 is connected to the outlet of the No. 1 adjustable gate valve 15. The other three of the four-way flue 25 are respectively provided with a flue gas port 16, a four-way No. 1 flange 17, and a four-way No. 2 flange 18. The flue gas port 16 leads to the smoke treatment device.

[0023] The vertical outlet of the exhaust and return air tee 14 is sequentially connected along the same vertical axis to the #2 adjustable gate valve 19, the return flue duct 21, and the supply air tee 24. One end of the supply air tee 24 is connected to the outlet of the return flue duct 21, and the other two ends of the supply air tee 24 are connected to the supply air regulating valve 22 and the supply air duct 2, respectively. The inlet of the supply air regulating valve 22 is connected to the supply air outlet 23, which is connected to an air pump. The exhaust and return air tee 14 is equipped with a #1 temperature measuring point 13, and the return flue duct 21 is equipped with a #2 temperature measuring point 20. These can be used to detect the temperature of both the exhaust and return air, and to adjust the ratio of exhaust and return air using the two gate valves according to different temperatures.

[0024] Example 2

[0025] like Figure 2 As shown, the difference from Embodiment 1 is that the other three passages of the exhaust tee 25 are respectively provided with exhaust tee 26, four-way flange 17, and four-way flange 2. The exhaust tee 26 leads to the smoke treatment device through two exhaust ports 16.

[0026] The operation process of the high-temperature corrosion experimental device for a fluidized bed combustion furnace in this invention is as follows:

[0027] 1. Cover the base plate flange 1;

[0028] 2. Coal particles (2-3 mm in size) are added into the furnace tube 8 via the spiral coal feeding hopper 5;

[0029] 3. Install the samples on sample hanging rod 7 (1#) and sample hanging rod 9 (2#), and use quartz glass for the corresponding observation windows;

[0030] 4. Cover the upper cover flange 10 with the upper cover insulation layer 11;

[0031] 5. Close the adjustable valves of adjustable gate valve 15 (1#) and adjustable gate valve 19 (2#);

[0032] 6. Seal the four-way flanges #1 and #2 (18).

[0033] 7. Turn on the heating switch of auxiliary heating wire 6;

[0034] 8. The temperature in the furnace tube 8 is raised to 800℃ or above;

[0035] 9. Open the 1# adjustable gate valve 15;

[0036] 10. Open the air supply regulating valve 22 to adjust the air supply;

[0037] 11. Open the screw coal powder feeding tank 5, adjust the coal supply, and observe the temperature in the furnace;

[0038] 12. After the coal particles are burned, gradually adjust the heating power (reduce) of the auxiliary heating wire 6;

[0039] 13. After the coal particles are fully burned, observe the temperature in the furnace until the auxiliary heating is not needed;

[0040] 14. Open and adjust the opening ratio of the 2# adjustable gate valve 19 and the 1# adjustable gate valve 15 to achieve the normal heat circulation air supply and exhaust air ratio, and start timing the sample experiment;

[0041] 15. When the experiment timing is over, stop feeding the coal particles;

[0042] 16. Close the 2# adjustable gate valve 19;

[0043] 17. Open the air supply regulating valve 22 to the maximum position to increase the air supply and cool the furnace tube 8;

[0044] 18. When the temperature in the furnace is lowered, close the air supply regulating valve 22 and naturally cool the furnace tube 8;

[0045] 19. After cooling to room temperature, take out the sample and open all the flanges.

Claims

1. A high-temperature corrosion experimental apparatus for a fluidized bed combustion furnace, characterized in that, A furnace tube insulation layer is installed around the vertical furnace tube. An auxiliary heating wire is wound around the furnace tube and located between the furnace tube and the furnace tube insulation layer. A top cover flange and an air supply pipe are respectively installed at the upper and lower ends of the furnace tube. A top cover insulation layer is installed on the top of the top cover flange. A quartz sand layer is installed at the bottom of the furnace tube cavity. A bottom plate flange is installed at the lower end of the air supply pipe. Horizontal sample hanging rods No. 1 and No. 2 are respectively installed in the middle and upper parts of the furnace tube cavity. A spiral coal powder feeding tank connected to the furnace tube cavity is installed on the lower side of the furnace tube.

2. The high-temperature corrosion experimental apparatus for a fluidized bed combustion furnace according to claim 1, characterized in that, A flue gas pipe connected to the inner cavity of the furnace tube is installed on the upper side of the furnace tube. The outlet of the flue gas pipe is connected in sequence to the exhaust and return air tee, the No. 1 adjustable gate valve, and the flue gas four-way valve along the same horizontal axis. One of the four-way valves is connected to the outlet of the No. 1 adjustable gate valve. The other three of the four-way valves are respectively equipped with a flue gas outlet, a No. 1 flange of the four-way valve, and a No. 2 flange of the four-way valve. The flue gas outlet leads to the smoke treatment device.

3. The high-temperature corrosion experimental apparatus for a fluidized bed combustion furnace according to claim 2, characterized in that, The other three tees of the exhaust tee are respectively equipped with exhaust tee, four-way flange #1, and four-way flange #2. The exhaust tee leads to the smoke treatment device through two exhaust ports.

4. The high-temperature corrosion experimental apparatus for a fluidized bed combustion furnace according to claim 1, characterized in that, The vertical outlet of the exhaust and return air tee is connected sequentially along the same vertical axis to the No. 2 adjustable gate valve, the return flue, and the supply air tee. One of the supply air tee outlets is connected to the outlet of the return flue. The other two outlets of the supply air tee are connected to the supply air regulating valve and the supply air pipe, respectively. The inlet of the supply air regulating valve is connected to the supply air outlet, and the supply air outlet is connected to the air pump.

5. The high-temperature corrosion experimental apparatus for a fluidized bed combustion furnace according to claim 1, characterized in that, Temperature measuring point #1 is installed on the exhaust and return air tee, and temperature measuring point #2 is installed on the return flue gas pipe.

6. The high-temperature corrosion experimental apparatus for a fluidized bed combustion furnace according to claim 1, characterized in that, Observation windows are provided on the sides of the furnace tubes corresponding to sample hanging rod #1 and sample hanging rod #2, respectively.

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