Flue gas spraying and dust removing device for firewood burning kiln

Abstract

The utility model discloses a firewood-fired kiln flue gas spraying dust removal device which comprises a chimney and a spraying assembly, a check block is arranged at the upper end of the chimney through a connecting rod, the size of the check block is larger than that of a flue gas circulation channel in the chimney, and the spraying assembly is located above the check block. The spraying assembly comprises a plurality of water spraying ring pipes which are concentrically arranged and sequentially arranged from inside to outside, one water spraying ring pipe is connected with a water inlet pipe, every two adjacent water spraying ring pipes are communicated through a communicating pipe, the size of each water spraying ring pipe is larger than that of the corresponding check block, and a plurality of spraying heads spraying water downwards are evenly distributed on each water spraying ring pipe along the circumference. The chimney is sleeved with an annular water receiving groove, the edge size of the water receiving groove is larger than the size of the water spraying ring pipe located on the outermost side, a blow-off pipe is arranged at the bottom of the water receiving groove, and the water spraying ring pipes, the check blocks, the water receiving groove and the chimney are coaxially arranged. In conclusion, the dust removal device has the advantages that the dust removal effect is good, the environmental pollution can be reduced, and the firing quality is not influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas purification, in particular to a flue gas spraying and dust removal device for a wood-fired kiln. Background Art

[0002] The wood-fired kiln is used to fire pottery, using firewood as fuel to raise the temperature inside the kiln. The biggest difference between the wood-fired kiln and the modern electric kiln and gas kiln is that the ashes and flames produced by the burning of firewood will directly rush into the kiln under the suction of the chimney, causing natural ash falling on the pottery. When the temperature in the kiln is as high as 1200℃, some inorganic substances in the firewood ash will react chemically with the glaze after a long period of heating, thereby changing the molecular structure of the glaze, making the glaze warm in color and rich in layers.

[0003] However, since the wood-fired kiln needs to burn a large amount of miscellaneous firewood, pine branches and other wood to increase and maintain the firing temperature in the kiln, while consuming a large amount of firewood, the burning process of the firewood will also produce a large amount of smoke and dust such as sawdust, ash and particulate matter. These smoke and dust are often discharged into the atmosphere without purification or relatively simple treatment, and the dust removal and purification effect is poor. After the smoke is discharged, it causes certain pollution to the atmosphere and the surrounding environment; secondly, although some manufacturers have taken some flue gas treatment measures, these flue gases are transported to the corresponding treatment equipment through pipelines for filtering and dust removal, but because the flue gas needs to be transported through a long pipeline and dusted and purified in the treatment equipment, this process will cause greater resistance to the flow of the flue gas, affecting the suction strength of the chimney to the smoke in the kiln, and then may affect the firing quality of pottery and the formation effect of gray glaze, which is not conducive to the firing of pottery. Therefore, it is an objective need to develop a wood-fired kiln flue gas spray dust removal device with good dust removal effect, which can reduce environmental pollution and does not affect the firing quality. Utility Model Content

[0004] The utility model aims to provide a smoke spray dust removal device for a wood-fired kiln which has good dust removal effect, can reduce environmental pollution and does not affect the firing quality.

[0005] The purpose of the utility model is achieved in this way, including a chimney and a spray assembly, the upper end of the chimney is provided with a block through a connecting rod, the size of the block is larger than the size of the smoke flow channel inside the chimney, the spray assembly is located above the block, the spray assembly includes a plurality of water spray ring pipes arranged concentrically and arranged in sequence from the inside to the outside, one of the water spray ring pipes is connected to a water inlet pipe, two adjacent water spray ring pipes are connected by a connecting pipe, the size of the water spray ring pipe is larger than the size of the block, each water spray ring pipe is evenly distributed along the circumference with a plurality of nozzles spraying water downward, an annular water receiving trough is mounted on the chimney, the edge size of the water receiving trough is larger than the size of a water spray ring pipe located at the outermost side, a sewage pipe is arranged at the bottom of the water receiving trough, and the water spray ring pipe, the block and the water receiving trough are all coaxially arranged with the chimney.

[0006] Furthermore, a water storage tank is arranged on one side of the chimney, a water outlet of the water storage tank is connected with a water inlet pipe, a water pump is arranged on the water inlet pipe, and a water inlet of the water storage tank is connected with a sewage pipe.

[0007] Furthermore, a filter is provided on the sewage pipe.

[0008] Furthermore, the heights of the plurality of water spray ring pipes increase sequentially from the inside to the outside.

[0009] Furthermore, a retaining ring is provided on the outer side of the spray assembly, and the lower end of the retaining ring is connected to the water receiving trough.

[0010] Furthermore, the cross-sectional shape of the water receiving trough is an arc with a concave middle portion and a convex edge, and the sewage pipe is located at the lowest point of the arc.

[0011] Furthermore, the number of the water spray ring pipes is 2 to 5.

[0012] When the utility model is in operation, the pottery blanks are fired in the wood-fired kiln, and the smoke generated by the burning of the firewood is discharged into the chimney from the tail of the wood-fired kiln, and then discharged from the upper port of the chimney. The smoke is blocked by the block in the process of rising, and is discharged from the four sides of the block. At the same time, water is injected into one of the water spray ring pipes through the water inlet pipe, and then flows into all the water spray ring pipes through the connecting pipe, and finally sprayed out from the nozzle. When the smoke flows under the nozzle, the sprayed water mist contacts the smoke and sprays and washes the smoke. The water mist absorbs smoke dust such as wood chips, ash and particulate matter in the smoke and falls down. The washed smoke is discharged into the atmosphere, and the falling sewage containing smoke dust falls into the water receiving trough and is discharged from the sewage pipe. In the above process, the flue gas first flows from bottom to top in the chimney until it is discharged from the upper port of the chimney. It is blocked by the block, and the flue gas impacts the block and can flow out relatively evenly around the block. During the flow, the flue gas passes under multiple water spray rings in turn, and is washed once each time it passes under a water spray ring. After the flue gas is washed by multiple sprays in turn, most of the smoke dust such as wood chips, ashes and particulate matter can be separated out, so that a better dust removal effect can be obtained before the flue gas is discharged, thereby effectively reducing the impact of the flue gas on the large Secondly, compared with the current method of transporting smoke to corresponding processing equipment through pipelines for smoke dust removal, the smoke spray dust removal device described in the utility model is directly installed above the chimney, and the smoke in the chimney can be discharged from the chimney normally without passing through pipelines and processing equipment, eliminating the problem of pipelines and equipment generating resistance to smoke transportation, and does not affect the strength and size of the chimney's suction of smoke in the kiln, thereby ensuring the firing quality of pottery and the formation effect of gray glaze, and does not affect the normal firing of pottery. In summary, the utility model has the advantages of good dust removal effect, can reduce environmental pollution, and does not affect the firing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1It is a schematic diagram of the overall structure of the utility model;

[0014] In the figure: 1-chimney, 2-connecting rod, 3-block, 4-smoke flow channel, 5-water spray ring, 6-water inlet pipe, 7-sprinkler, 8-water trough, 9-drain pipe, 10-water storage tank, 11-water pump, 12-filter, 13-retaining ring. DETAILED DESCRIPTION

[0015] The present invention is further described below in conjunction with the accompanying drawings, but the present invention is not limited in any way. Any changes or improvements made based on the present invention belong to the protection scope of the present invention.

[0016] like Figure 1 As shown, the utility model includes a chimney 1 and a spray assembly. A stopper 3 is provided at the upper end of the chimney 1 through a connecting rod 2. The size of the stopper 3 is larger than the size of the smoke flow channel 4 inside the chimney 1. The stopper 3 has the function of diverting the smoke and also has the function of preventing rain, snow and impurities from falling into the chimney 1. The spray assembly is located above the stopper 3. The spray assembly includes a plurality of water spray ring pipes 5 that are concentrically arranged and sequentially arranged from the inside to the outside. The water spray ring pipe 5 can be circular, rectangular, square or the like, which is determined according to the shape of the chimney 1 and other conditions. A water spray ring pipe 5 is connected to a water inlet pipe 6, and two adjacent water spray ring pipes 5 are connected by a connecting pipe. The size of the water spray ring pipe 5 is larger than the size of the block 3. Each water spray ring pipe 5 is evenly distributed along the circumference with a plurality of nozzles 7 that spray water downward. The chimney 1 is provided with an annular water receiving trough 8, which is located near the upper end of the chimney 1. The edge size of the water receiving trough 8 is larger than the size of the outermost water spray ring pipe 5. A sewage pipe 9 is arranged at the bottom of the water receiving trough 8. The water spray ring pipe 5, the block 3, and the water receiving trough 8 are all coaxially arranged with the chimney 1.

[0017] When the utility model is in operation, the pottery blank is fired in the wood-fired kiln, and the smoke generated by the burning of the firewood is discharged into the chimney 1 from the tail of the wood-fired kiln, and then discharged from the upper port of the chimney 1. The smoke is blocked by the block 3 during the rising process, and is discharged from the four sides of the block 3. At the same time, water is injected into one of the water spray ring pipes 5 through the water inlet pipe 6, and then passed into all the water spray ring pipes 5 through the connecting pipe, and finally sprayed out from the nozzle 7. When the smoke flows under the nozzle 7, the sprayed water mist contacts the smoke and sprays and washes the smoke. The water mist absorbs smoke dust such as wood chips, ash and particulate matter in the smoke and falls down. The washed smoke is discharged into the atmosphere, and the falling sewage containing smoke dust falls into the water receiving trough 8 and is discharged from the sewage pipe 9. In the above process, the flue gas first flows from bottom to top in the chimney 1 until it is discharged from the upper port of the chimney 1. It is blocked by the block 3, and the flue gas impacts the block 3 and can flow out relatively evenly around the block 3. During the flow, the flue gas passes under multiple water spray rings 5 ​​in turn, and is washed once each time it passes under a water spray ring 5. After the flue gas is washed by multiple sprays in turn, most of the smoke dust such as wood chips, ashes and particulate matter can be separated out, so that a better dust removal effect can be obtained before the flue gas is discharged, thereby effectively reducing the impact of the flue gas on the environment. The pollution of the atmosphere and the surrounding environment; secondly, compared with the current method of transporting the flue gas to the corresponding processing equipment through pipelines for flue gas dust removal, the flue gas spray dust removal device described in the utility model is directly installed above the chimney 1, and the flue gas in the chimney 1 can be discharged from the chimney 1 normally without passing through pipelines and processing equipment, thereby eliminating the problem of resistance to the flue gas transportation caused by pipelines and equipment, and does not affect the suction force and size of the chimney 1 on the flue gas in the kiln, thereby ensuring the firing quality of pottery and the formation effect of gray glaze, and does not affect the normal firing of pottery.

[0018] A water storage tank 10 is provided on one side of the chimney 1. The water storage tank 10 is used to store circulating water. The water outlet of the water storage tank 10 is connected to the water inlet pipe 6. The water inlet pipe 6 is provided with a water pump 11. The water inlet of the water storage tank 10 is connected to the sewage pipe 9. During operation, the sewage in the water receiving tank 8 is discharged from the sewage pipe 9 to the water storage tank 10 for storage, and a certain sedimentation is performed to remove impurities in the water, and then the sewage is returned to the water spray ring pipe 5 through the water inlet pipe 6 for recycling. The above method achieves the recycling of water resources, has the effect of saving water resources, and reduces the operating cost of flue gas spray dust removal.

[0019] A filter 12 is provided on the sewage pipe 9. The filter 12 is an existing device for filtering out smoke dust such as sawdust, ash and particulate matter in the sewage to prevent the smoke dust from clogging the sewage pipe 9, the water storage tank 10, the water inlet pipe 6 and the nozzle 7. Secondly, if the above-mentioned smoke dust is not filtered out from the sewage, the washing and dust removal effect of the water mist on the flue gas will be reduced during continued use. In order to filter out the smoke dust, the filter 12 is provided to ensure that all pipelines and equipment can operate smoothly for a long time, and at the same time ensure that the recycled water has a good dust removal ability.

[0020] Since the flue gas itself contains a certain amount of heat and its temperature is higher than that of the surrounding air, when the flue gas is discharged from the chimney 1 and hits the block 3 to flow around, it will present a state of tilted upward floating, rather than horizontal floating. In this state, if multiple water spray ring pipes 5 are on the same horizontal plane, the flue gas may have floated upward before it has drifted to the water spray ring pipes 5 at the outer position. In this way, the water spray ring pipe 5 located at the outermost position loses the dust removal effect, and the flue gas cannot be effectively purified. In order to solve this problem, the heights of the multiple water spray ring pipes 5 are successively increased from the inside to the outside, and the arrangement method is adapted to the drifting process of the flue gas, so that all the water spray ring pipes 5 have the ability to remove dust, ensuring that the flue gas obtains a better dust removal effect.

[0021] A retaining ring 13 is provided on the outside of the spray assembly, and the lower end of the retaining ring 13 is connected to the water receiving trough 8. The retaining ring 13 has two functions: one is to block water. In actual use, it is found that when water is sprayed from the nozzle 7, due to the problem of wind blowing or the angle of water mist spraying, part of the water mist often cannot fall into the water receiving trough 8, but falls from the outside of the water receiving trough 8, which will not only pollute the environment on site, but also cause waste of water resources. After the retaining ring 13 is set, it can effectively block the water mist from spraying outside, so that all the water mist can fall into the water receiving trough 8; the second is to block the wind. In windy weather, the smoke and water mist will flow under the blowing of the wind, so that the smoke and water mist cannot be evenly and effectively contacted, thereby reducing the dust removal effect of the smoke. After the retaining ring 13 is set, it can play an effective wind blocking role to ensure efficient dust removal of the smoke.

[0022] The cross-sectional shape of the water receiving trough 8 is an arc with a concave middle portion and convex edges. The sewage pipe 9 is located at the lowest point of the arc. In order to be able to promptly and quickly discharge the sewage falling into the water receiving trough 8 and prevent the smoke and dust in the sewage from depositing, the water receiving trough 8 is set to a structure with a concave middle portion, which can quickly and thoroughly discharge the sewage.

[0023] Generally speaking, the number of water spray ring pipes 5 is 2 to 5. The specific number can be determined according to parameters such as the diameter of the chimney 1, the length of the wood-fired kiln, the firing amount of pottery, etc. Generally speaking, it is sufficient to spray, wash and remove dust from the flue gas. In actual use, the utility model adopts 3 water spray ring pipes 5, which can achieve a good filtering and dust removal effect on the flue gas.

Claims

1. A smoke spray dust removal device for a wood-fired kiln, comprising a chimney (1) and a spray assembly, characterized in that The chimney (1) is provided with a block (3) at the upper end thereof via a connecting rod (2); the size of the block (3) is larger than the size of the smoke flow channel (4) inside the chimney (1); the spray assembly is located above the block (3); the spray assembly comprises a plurality of water spray ring pipes (5) arranged concentrically and arranged in sequence from the inside to the outside; one of the water spray ring pipes (5) is connected to a water inlet pipe (6); two adjacent water spray ring pipes (5) are connected via a connecting pipe; the size of the water spray ring pipe (5) is larger than the block ( 3), each water spraying ring pipe (5) is evenly distributed along the circumference thereof with a plurality of nozzles (7) for spraying water downwards, the chimney (1) is provided with an annular water receiving trough (8), the water receiving trough (8) is located near the upper end of the chimney (1), the edge size of the water receiving trough (8) is larger than the size of the outermost water spraying ring pipe (5), a sewage pipe (9) is provided at the bottom of the water receiving trough (8), and the water spraying ring pipe (5), the block (3), and the water receiving trough (8) are all coaxially arranged with the chimney (1).

2. The smoke spray dust removal device for a wood-fired kiln according to claim 1 is characterized in that A water storage tank (10) is provided on one side of the chimney (1), a water outlet of the water storage tank (10) is connected to a water inlet pipe (6), a water pump (11) is provided on the water inlet pipe (6), and a water inlet of the water storage tank (10) is connected to a sewage discharge pipe (9).

3. The smoke spray dust removal device for a wood-fired kiln according to claim 2 is characterized in that The sewage pipe (9) is provided with a filter (12).

4. The smoke spray dust removal device for a wood-fired kiln according to claim 1 is characterized in that The heights of the plurality of water spray ring pipes (5) are increased from the inside to the outside.

5. The smoke spray dust removal device for a wood-fired kiln according to claim 1 is characterized in that A retaining ring (13) is provided on the outer side of the spray assembly, and the lower end of the retaining ring (13) is connected to the water receiving trough (8).

6. The smoke spray dust removal device for a wood-fired kiln according to claim 1 is characterized in that The cross-sectional shape of the water receiving trough (8) is an arc with a concave middle portion and a convex edge, and the sewage discharge pipe (9) is located at the lowest point of the arc.

7. The smoke spray dust removal device for a wood-fired kiln according to claim 1 is characterized in that The number of the water spray ring pipes (5) is 2 to 5.

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