Novel flue gas pressure sampling device for circulating fluidized bed unit

Abstract

The utility model discloses a novel flue gas pressure sampling device for a circulating fluidized bed unit. At present, dredging can be carried out in a back flushing mode when the sampling pipe is slightly blocked, but blockage cannot be dredged in the back flushing mode when the sampling pipe is heavily blocked. The device comprises a flue, a sampling barrel and an X-shaped smoke inlet pipe, one end of the X-shaped smoke inlet pipe is inserted into the flue, the top of the vertical end of the X-shaped smoke inlet pipe is connected to the bottom of the sampling barrel, the top of the sampling barrel is connected with a smoke return pipe, the smoke return pipe is inserted into the flue, and a slag dredging device is installed on the X-shaped smoke inlet pipe; the slag dredging device comprises a conical head and a sliding block, the end of an inner rod is fixed to the conical head and is in sliding fit with the sliding block, an outer sleeve is fixed to the sliding block and is arranged on the inner rod in a sleeving mode, and a plurality of elastic rods arranged in a circumferential mode are connected between the conical head and the sliding block. The flue gas pressure sampling device is used for flue gas pressure sampling.

Description

Technical Field

[0001] The utility model relates to a flue gas pressure sampling device for a new type of circulating fluidized bed unit. Background Art

[0002] The accurate measurement of the pressure in the flue gas system of a power plant is crucial for ensuring the safe and stable operation of the flue gas system of the power plant.

[0003] In the patent with the patent application number 202320578063X and the patent name of a new type of purge anti-blocking pressure sampling device for the air and flue gas system, it is disclosed that it includes a sampling pipeline connecting pipe, a sampling bucket is connected to the lower part of the sampling pipeline connecting pipe, a purge connecting pipe is connected to the side of the sampling pipeline connecting pipe, a conical hopper is connected to the lower part of the sampling bucket, an umbrella-shaped structural member is installed in the sampling bucket, and an X-shaped sampling pipe is connected to the lower part of the conical hopper.

[0004] The above application is provided with a purge connecting pipe for dredging when the sampling pipe is blocked. When the blockage of the sampling pipe is relatively light, it can be dredged by the back-blowing method. However, when the blockage is relatively heavy, the back-blowing method cannot dredge the blockage. Moreover, when back-blowing, the flue gas outlet pipeline needs to be closed, and correspondingly, flue gas pressure sampling cannot be carried out during the back-blowing dredging. Content of the Utility Model

[0005] The purpose of the utility model is to solve the above-mentioned existing problems, so as to provide a flue gas pressure sampling device for a new type of circulating fluidized bed unit.

[0006] The above purpose is achieved by the following technical solutions:

[0007] A flue gas pressure sampling device for a new type of circulating fluidized bed unit, which comprises: a flue, a sampling cylinder and an X-shaped flue gas inlet pipe. One end of the X-shaped flue gas inlet pipe is inserted into the flue, and the top of its vertical end is connected to the bottom of the sampling cylinder. A return flue gas pipe is connected to the top of the sampling cylinder, and the return flue gas pipe is inserted into the flue. A slag remover is installed on the X-shaped flue gas inlet pipe;

[0008] The slag remover includes a conical head and a slider. The end of the inner rod is fixed on the conical head and is slidably matched with the slider. An outer sleeve pipe is fixed on the slider and sleeved on the inner rod. A plurality of elastic rods arranged in a circumferential manner are connected between the conical head and the slider.

[0009] For the flue gas pressure sampling device for a new type of circulating fluidized bed unit, the elastic rod is a fiberglass rod.

[0010] For the flue gas pressure sampling device for a new type of circulating fluidized bed unit, a handle block is fixed on the outer sleeve pipe. Advantageous Effects

[0011] 1. The utility model is provided with a slag dredger, through which the accumulated slag in the smoke inlet pipe can be effectively cleaned, so as to dredge the smoke inlet pipe. At the same time, the smoke sampling is not affected during the dredging process.

[0012] 2. When cleaning, the slag dredger of the utility model can push the slider into the inside of the smoke inlet pipe, and then bend its elastic rod to form a cage-like structure, which can pull out the accumulated slag inside to realize the cleaning of the accumulated slag. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] FIG Figure 1 is a schematic structural view of the utility model;

[0014] FIG Figure 2 is a schematic structural view of the slag dredger;

[0015] FIG Figure 3 is the sectional view taken along line A-A of FIG Figure 2 ;

[0016] FIG Figure 4 is a schematic structural view of the elastic rod of the slag dredger after bending;

[0017] FIG Figure 5 is the sectional view taken along line B-B of FIG Figure 4 ;

[0018] FIG Figure 6 is a schematic structural view of the utility model during slag dredging;

[0019] In the figure: 1, flue; 2, return smoke pipe; 3, sampling cylinder; 4, X-shaped smoke inlet pipe; 5, screw cap; 6, slag dredger; 7, main valve; 8, backwashing pipe; 9, conical head; 10, elastic rod; 11, slider; 12, outer sleeve; 13, fixing bolt; 14, inner rod; 15, handle block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Referring to Figures 1 - 4 , a new type of flue gas pressure sampling device for a circulating fluidized bed unit, which comprises: a flue 1, a sampling cylinder 3 and an X-shaped smoke inlet pipe 4. One end of the X-shaped smoke inlet pipe is inserted into the flue, and the top of its vertical end is connected to the bottom of the sampling cylinder. The top of the sampling cylinder is connected with a return smoke pipe 2, and the return smoke pipe is inserted into the flue. A slag dredger 6 is installed on the X-shaped smoke inlet pipe;

[0021] During sampling, the flue gas in the flue enters through the X-shaped smoke inlet pipe, and then enters the sampling cylinder. The conical shape inside the sampling cylinder is used to separate the dust in the flue gas. The separated flue gas returns to the flue through the return smoke pipe to realize flue gas sampling. After long-term sampling of the flue gas, slag accumulation will occur in the X-shaped smoke inlet pipe. When slag accumulation occurs, it is dredged by the slag dredger;

[0022] The slag remover described above includes a conical head 9 and a slider 11. The end of the inner rod is fixed to the conical head and is in sliding fit with the slider. An outer sleeve 12 is fixed on the slider and sleeved on the inner rod 14. A plurality of elastic rods 10 arranged in a circle are connected between the conical head and the slider.

[0023] The elastic rod is a fiberglass rod.

[0024] A handle block 15 is fixed on the outer sleeve.

[0025] When performing slag removal, referring to Figure 6 , the outer sleeve and the central hole of the screw cap are in clearance fit and can slide. When slag removal is not carried out, a sealing ring is inserted between the outer sleeve and the central hole of the screw cap for sealing. When slag removal is required, the sealing ring is removed. Two threaded holes are provided on the inner rod for positioning the outer sleeve at different sliding positions. When the fixing bolt is screwed into the threaded hole at the lower end, the elastic rod is in a vertical state and does not deform. When the fixing bolt is screwed into the threaded hole at the upper end, it indicates that the elastic rod deforms. When cleaning the vertical end of the X-shaped smoke inlet pipe, hold the handle rod and push the device inward. When a small section of the outer sleeve remains outside the screw cap, unscrew the fixing bolt, then keep the inner rod stationary and slide the outer sleeve to make the elastic rod deform into an arc shape. Then, after fixing the position of the outer sleeve with the fixing bolt, hold the handle block and pull the device outward. During the pulling process, the accumulated slag inside can be cleaned out. The slag removal principle of the inclined part of the X-shaped smoke inlet pipe is the same as that of the vertical part, and the two cannot be carried out simultaneously. Slag removal needs to be carried out separately, one after the other.

Claims

1. A flue gas pressure sampling device for a new type of circulating fluidized bed unit, which comprises: Flue, sampling cylinder and X-shaped smoke inlet pipe, characterized in that: one end of the X-shaped smoke inlet pipe is inserted into the flue, the top of its vertical end is connected to the bottom of the sampling cylinder, the top of the sampling cylinder is connected with a smoke return pipe, the smoke return pipe is inserted into the flue, and a slag remover is installed on the X-shaped smoke inlet pipe; The slag remover includes a conical head and a slider. The end of the inner rod is fixed on the conical head and is slidably matched with the slider. An outer sleeve is fixed on the slider and sleeved on the inner rod. A plurality of elastic rods arranged in a circle are connected between the conical head and the slider.

2. A novel flue gas pressure sampling device for a circulating fluidized bed unit according to claim 1, characterized in that: The elastic rod is a glass fiber rod.

3. A novel flue gas pressure sampling device for a circulating fluidized bed unit according to claim 2, characterized in that: A handle block is fixed on the outer sleeve.

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