Coal mill heat removal tuyere pipeline and settling chamber structure

Abstract

The utility model discloses a hot air port pipeline and settling chamber structure of a coal mill. The hot air port pipeline and settling chamber structure comprises a plurality of settling bins and a plurality of diversion pipes, the settling bin comprises a separating bin, a dust collecting hopper, an air inlet pipe and an exhaust pipe, the bottom end of the separating bin is open, one end of the dust collecting hopper is connected with the open end of the separating bin, and the end, away from the separating bin, of the dust collecting hopper is gradually closed in a fixed dip angle mode but not sealed; the air inlet pipe is arranged on one side face of the separation bin and located at the position, close to the dust collecting hopper, of the side face, and the exhaust pipe is arranged on the side face, away from the air inlet pipe, of the separation bin and located at the position, away from the dust collecting hopper, of the side face. The multiple settling bins are arranged in parallel at equal intervals, the multiple diversion pipes are arranged among the multiple settling bins at intervals, fly ash of the grate cooler is removed in a multi-layer settling mode, the coal dilution phenomenon is reduced, and coal heat value deviation is caused.

Description

TECHNICAL FIELD

[0001] The utility model relates to coal mill dust removal technical field, concretely is a coal mill hot air outlet pipe and settling chamber structure. BACKGROUND

[0002] In the industrial field such as cement production, coal mill hot air pipe plays a vital role. The coal mill system needs stable heat source to dry coal powder to ensure the smooth progress of the production process. The hot air pipe is usually connected with the grate cooler and other equipment to introduce high-temperature hot gas into the coal mill.

[0003] With the continuous development of industrial technology, the performance requirements of coal mill hot air pipe are also getting higher and higher. In the traditional process, the hot air pipe is responsible for transmitting high-temperature gas to provide the required heat for the drying of coal powder. However, due to factors such as design and operating conditions of the hot air pipe, some problems often occur in actual use.

[0004] The existing coal mill hot air pipe is easy to carry the fly ash of the grate cooler during operation. These fly ash enters the hot air pipe and enters the coal mill system with the hot gas, causing serious dilution of the coal. The increase of impurities in the coal makes the heat value deviation of the coal larger, which affects the subsequent combustion process and product quality, and brings many adverse effects to industrial production. SUMMARY

[0005] Based on the above problems existing in the prior art, the purpose of the embodiments of the utility model is to provide a coal mill hot air outlet pipe and settling chamber structure to remove the fly ash of the grate cooler in a multi-layer settling manner, reduce the dilution of the coal, and make the heat value deviation of the coal.

[0006] The technical scheme adopted by the utility model to solve its technical problems is: a coal mill hot air outlet pipe and settling chamber structure, comprising a plurality of settling bins and a plurality of diversion pipes.

[0007] The settling bin comprises a separation bin, a dust collection hopper, an air inlet pipe and an air outlet pipe, the bottom end of the separation bin is open, one end of the dust collection hopper is connected with the open end of the separation bin, the end of the dust collection hopper away from the separation bin gradually converges at a fixed inclination but is not sealed, the air inlet pipe is arranged on one side of the separation bin and located at a position close to the dust collection hopper, and the air outlet pipe is arranged on a side of the separation bin away from the air inlet pipe and located at a position away from the dust collection hopper.

[0008] A plurality of the settling bins are arranged equidistantly and in parallel, and a plurality of diversion pipes are arranged equidistantly between a plurality of the settling bins.

[0009] One end of the bypass pipe is connected with the air exhaust pipe on one side of the settling bin, and the other end of the bypass pipe is connected with the air inlet pipe on the other side of the settling bin.

[0010] Further, the settling bin comprises a top cover arranged at the end of the separating bin away from the dust collecting hopper and sealing the end.

[0011] Further, the settling bin comprises a baffle plate.

[0012] The separating bin is provided with a clamping groove on one of the sidewalls not provided with the air inlet pipe and the air exhaust pipe, and the clamping groove penetrates the other sidewall.

[0013] The baffle plate is arranged in the clamping groove, and the concave side of the baffle plate faces the air inlet pipe.

[0014] Further, the settling bin comprises a surrounding fence.

[0015] The surrounding fence is arranged on the sidewall of the separating bin penetrated by the clamping groove, and the surrounding fence surrounds the clamping groove.

[0016] Compared with the prior art, the present application has the following advantages:

[0017] 1. The air inlet pipe of the front end of the settling bin is connected with the grate cooler, and the air exhaust pipe of the rear end of the settling bin is connected with the hot air pipe, so that the gas in the grate cooler enters the hot air pipe, and then enters the settling bin, and the fly ash in the gas falls into the dust collecting hopper under the blockage of the baffle plate, and then the gas without the fly ash is discharged from the air exhaust pipe of the settling bin to the next settling bin, and the gas is further purified, and the content of the fly ash in the gas is greatly reduced, and then the gas is discharged into the hot air pipe, and when the gas enters the coal mill from the hot air pipe, the gas is clean, and the coal dilution phenomenon is reduced, so that the heat value deviation of the coal is reduced.

[0018] 2. The horizontal height of the air inlet pipe is higher than that of the air exhaust pipe, so that after the gas in the grate cooler enters the settling bin, the gas is first stored in the settling bin, and then enters the air exhaust pipe, and in this process, the potential energy of the gas is partially consumed, and the large fly ash particles in the gas are driven by inertia, and the fly ash particles fall into the dust collecting hopper due to the consumption of potential energy and gravity, so that the purification effect of the settling bin on the gas is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] The present application will be further described below in combination with the drawings and examples.

[0020] In the drawings:

[0021] Figure 1 is the three-dimensional schematic view of the pipeline and the settling chamber structure in the utility model;

[0022] Figure 2 is Figure 1 the three-dimensional schematic view of the settling bin in the utility model;

[0023] Figure 3 is Figure 1 the sectional view of the settling bin in the utility model;

[0024] in the figure:

[0025] 1, settling bin;

[0026] 11, separation bin; 12, dust collecting hopper; 13, air inlet pipe; 14, air outlet pipe; 15, fence; 16, top cover; 17, baffle;

[0027] 110, clamping groove;

[0028] 151, end cover;

[0029] 2, diversion pipe. DETAILED DESCRIPTION

[0030] The utility model will be explained in detail in combination with the drawings. The figure is a simplified schematic view, and only the basic structure of the utility model is schematically shown, so it only shows the structure related to the utility model.

[0031] Please refer to Figures 1-3 , the utility model provides technical scheme: a coal mill hot air outlet pipe and settling chamber structure, including multiple settling bins 1 and multiple diversion pipes 2.

[0032] Multiple settling bins 1 are equidistantly and parallelly arranged, and multiple diversion pipes 2 are arranged at intervals between multiple settling bins 1.

[0033] The settling bin 1 includes a separation bin 11, a dust collecting hopper 12, an air inlet pipe 13, an air outlet pipe 14, a fence 15, a top cover 16 and a baffle 17.

[0034] The bottom end of the separation bin 11 is provided with an open shape, one end of the dust collecting hopper 12 is connected with the open end of the separation bin 11, and the end of the dust collecting hopper 12 away from the separation bin 11 is gradually gathered in a fixed angle mode but not sealed, the air inlet pipe 13 is arranged at one side of the separation bin 11 and located at the position close to the dust collecting hopper 12, and the air outlet pipe 14 is arranged at one side of the separation bin 11 away from the air inlet pipe 13 and located at the position away from the dust collecting hopper 12.

[0035] The separating bin 11 is provided with a clamping groove 110 on one side wall of the separating bin 11 which is not provided with the air inlet pipe 13 and the air outlet pipe 14, and the clamping groove 110 penetrates the other side wall, the horizontal height of the clamping groove 110 is the same as that of the air inlet pipe 13, and the enclosing fence 15 is arranged on the side wall of the separating bin 11 penetrated by the clamping groove 110, and the enclosing fence 15 surrounds the clamping groove 110, and the enclosing fence 15 is provided with an end cover 151 which seals the opening end of the enclosing fence 15.

[0036] The top cover 16 is arranged at the end of the separating bin 11 away from the dust collecting hopper 12 and seals the end.

[0037] The baffle 17 is in an arc shape, is inserted into the clamping groove 110, and the inner concave side of the baffle 17 faces the air inlet pipe 13.

[0038] One end of the bypass pipe 2 is connected with the air outlet pipe 14 on the settling bin 1 on one side of the bypass pipe 2, and the other end of the bypass pipe 2 is connected with the air inlet pipe 13 on the settling bin 1 on the other side of the bypass pipe 2.

[0039] The air inlet pipe 13 of the front end of the settling bin 1 is connected with the grate cooler, and the air outlet pipe 14 of the end of the settling bin 1 is connected with the hot air pipe, so that the gas in the grate cooler enters the hot air pipe, and then enters the settling bin 1, and the grate cooler fly ash in the gas falls into the dust collecting hopper 12 under the blockage of the baffle 17, and then the gas from which the grate cooler fly ash is removed is discharged from the air outlet pipe 14 of the settling bin 1 to the next settling bin 1 to be purified again, and after the gas is purified by the multiple settling bins 1, the content of the grate cooler fly ash in the gas is greatly reduced, and then the gas is discharged into the hot air pipe, and when the gas enters the coal mill from the hot air pipe, the high cleanliness of the gas can reduce the coal depletion phenomenon and make the calorific value of the coal more uniform.

[0040] Since the horizontal height of the air inlet pipe 13 is higher than that of the air outlet pipe 14, after the gas in the grate cooler enters the settling bin 1, the gas is first stored in the settling bin 1, and then enters the air outlet pipe 14, and in this process, the potential energy of the gas is partially consumed, and the large particles of the grate cooler fly ash driven by inertia will fall into the dust collecting hopper 12 due to the consumption of potential energy and the action of gravity, thereby enhancing the purification effect of the settling bin 1 on the gas.

[0041] Based on the above ideal embodiments of the present application, the related personnel can make various changes and modifications without deviating from the scope of the present application according to the above description. The technical scope of the present application is not limited to the contents in the specification, and must be determined according to the scope of the claims.

Claims

1. A coal mill hot air take-off port duct and settling chamber arrangement, characterised in that: The dust-settling chamber comprises a plurality of dust-settling chambers and a plurality of diversion pipes. The dust-settling chamber comprises a separation chamber, a dust hopper, an air inlet pipe and an air outlet pipe, the bottom end of the separation chamber is open, one end of the dust hopper is connected to the open end of the separation chamber, the end of the dust hopper away from the separation chamber gradually converges at a fixed angle but is not sealed, the air inlet pipe is arranged on one side of the separation chamber and located near the dust hopper, and the air outlet pipe is arranged on the side of the separation chamber away from the air inlet pipe and located away from the dust hopper. A plurality of dust-settling chambers are arranged equidistantly and in parallel, and a plurality of diversion pipes are arranged equidistantly between the plurality of dust-settling chambers. One end of the diversion pipe is connected to the air outlet pipe on the dust-settling chamber on one side of the diversion pipe, and the other end of the diversion pipe is connected to the air inlet pipe on the dust-settling chamber on the other side of the diversion pipe.

2. The coal mill hot air take-off duct and settling chamber structure according to claim 1, characterized in that: The dust-settling chamber comprises a top cover, which is arranged at the end of the separation chamber away from the dust hopper and seals the end.

3. The coal mill hot air take-off duct and settling chamber structure according to claim 1, characterized in that: The dust-settling chamber comprises a baffle. A clamping groove is arranged on the separation chamber, the clamping groove is arranged on one of the side walls of the separation chamber which is not provided with the air inlet pipe and the air outlet pipe, the clamping groove penetrates the other side wall, and the horizontal height of the clamping groove is the same as that of the air inlet pipe. The baffle is arranged in the clamping groove, and the concave side of the baffle faces the air inlet pipe.

4. The coal mill hot air take-off duct and settling chamber structure according to claim 3, characterized in that: The dust-settling chamber comprises a fence. The fence is arranged on the side wall of the separation chamber which is penetrated by the clamping groove, the fence surrounds the clamping groove, an end cover is arranged on the fence, and the end cover seals the open end of the fence.

Images