CN205838848U - Fly lime suspension calcination production line - Google Patents

Abstract

The utility model relates to a production line is calcined in whitewashed lime suspension, it includes rubble lime storage device, limestone flour preparation facilities, feeding device, suspension calcination cooling device, fuel feeding device, sieve material device, finished product storage device, exhaust treatment device. The suspension calcination cooling device comprises five-stage heating hoppers, a decomposing furnace and three-stage cooling hoppers, wherein the heating hoppers, the decomposing furnace and the cooling hoppers are communicated through a cyclone conveying pipe, a cyclone return pipe, a material pipe and an inverted U-shaped air pipe at the top of the decomposing furnace to form an air channel, the air channel is connected with a fan and a fuel gas supply end of a fuel supply device, so that suspension calcination is formed in the decomposing furnace, the suspension calcination temperature is 850-1000 ℃, the calcination time is within 10 seconds, the material pipe of the last-stage cooling hopper is used for discharging materials, and the materials are sieved by a material sieving device to obtain the finished product of powdered lime. The utility model discloses the whole production process is closed, and comparatively environmental protection has improved the heat utilization efficiency that the suspension was calcined to guarantee production efficiency and production quality.

Description

Fly lime suspension calcination production line

technical field

The utility model relates to lime production equipment, which is a powder lime suspension calcining production line.

Background technique

The traditional production methods of lime powder are mostly through the calcination reaction of large-grained limestone blocks, and then the blocky lime is crushed to obtain lime powder. This method is not only inefficient in lime production, but also the calcination reaction cannot ensure the full decomposition of massive limestone, often causing over-burning or under-burning problems, resulting in low yield and poor quality of final lime powder. In addition, traditional lime production not only has low efficiency and low heat utilization, but also has a lot of dust and waste residue, which is easy to cause environmental pollution. In order to solve these problems, the prior art has disclosed some preparations of powdered lime using a suspension calcination process, that is, the limestone is first ground to form limestone powder, and then enters the suspension calcination equipment for suspension calcination to obtain powder lime, which not only greatly improves production efficiency, but also heat High utilization rate, reduced energy consumption, and improved environmental pollution. However, the existing suspension calcination equipment still has problems in terms of fuel co-supply, mainly because the fuel is not fully combined with the air, resulting in sufficient combustion before combustion, resulting in poor overall heat utilization and working performance of the suspension calcination equipment. For this reason, existing equipment remains to be improved.

Contents of the invention

In order to overcome the above disadvantages, the utility model designs a powder lime suspension calcination production line to solve the technical problems of poor production efficiency and quality of existing similar powder lime production equipment. It adopts the following technical scheme to realize.

The powder lime suspension calcination production line includes a suspension calcination cooling device, a fuel supply device, and a screening device. The screening device is arranged at the discharge end of the suspension calcination cooling device. The fuel supply device includes a coal powder supply end and a gas supply end; it is characterized in that The suspension calcination cooling device includes a preheating part, a calcining part, and a cooling part. The preheating part includes a first-level heating bucket, a second-level heating bucket, a third-level heating bucket, a fourth-level heating bucket, and a fifth-level heating bucket. The calcining part is for decomposition. The cooling part of the furnace includes primary cooling hopper, secondary cooling hopper and tertiary cooling hopper. The bottoms of the hopper and the cooling hopper are all connected to the feed pipe, and the cyclone delivery pipe of the secondary heating hopper is used as the feed end of the suspension calcining cooling device, and is connected to the cyclone return pipe of the primary heating hopper, and the cyclone return pipe of the primary heating hopper The cyclone delivery pipe is used as the exhaust end of the suspension calcination cooling device, the material pipe of the first-level heating hopper is connected to the cyclone return pipe of the second-level heating hopper and the cyclone delivery pipe of the third-level heating hopper, and the material of the second-level heating hopper The pipe is connected to the cyclone return pipe of the third-level heating bucket and the cyclone delivery pipe of the fourth-level heating bucket, and the material pipe of the third-level heating bucket is connected to the cyclone return pipe of the fourth-level heating bucket and the cyclone delivery pipe of the fifth-level heating bucket. The material pipe of the four-stage heating hopper is connected to the calciner, the top of the calciner is connected to the cyclone return pipe of the five-stage heating hopper through an inverted U-shaped air pipe, and the bottom of the calciner is connected to the cyclone delivery pipe of the first-stage cooling hopper. The material pipe of the fifth-stage heating hopper is connected to the cyclone delivery pipe of the secondary cooling hopper and the cyclone return pipe of the primary cooling hopper, and the material pipe of the primary cooling hopper is connected to the cyclone of the third-stage cooling hopper. The delivery pipe and the cyclone return pipe of the secondary cooling hopper, the material pipe of the secondary cooling hopper is connected to the cyclone return pipe of the third-stage cooling hopper, and the cyclone return pipe of the third-stage cooling hopper is connected to the fan outlet pipe and the first stage of the screening device One feeding end, the material pipe of the three-stage cooling bucket is connected to the second feeding end of the screening device; the pulverized coal supply end of the fuel supply device is directly connected to the calciner, and the gas supply end The branch is connected to the cyclone return pipe of the first-stage cooling bucket, the cyclone return pipe of the third-stage cooling bucket and the decomposition furnace. Through the above structure, the five-stage heating bucket is used to achieve preheating, thereby improving the heat utilization rate, and at the same time, the gas supply end of the fuel supply device is connected to the pipeline of the cooling bucket in advance, and the gas flow is fully mixed to ensure that the gas enters The calciner can fully burn, improve thermal efficiency and limestone powder decomposition efficiency, and realize energy saving and emission reduction.

In the above structure, the connected cyclone delivery pipe and cyclone return pipe are integrated pipes, which is convenient for structural processing and connection. The primary heating bucket is a double-row structure, that is, two primary heating buckets are arranged side by side. The double-row structure is conducive to fully preheating the limestone powder.

The powder lime suspension calcination production line also includes a crushed limestone storage device, a limestone powder preparation device, a feeding device, a finished product storage device, and a waste gas treatment device. The discharge end of the crushed limestone storage device is connected to the feed end of the limestone powder preparation device. The discharge end of the limestone powder preparation device is connected to the feed end of the feeding device through the conveying mechanism, the discharge end of the feed device is connected to the feed end of the suspension calcining cooling device, and the discharge end of the screening device is connected to The finished product storage device, the suspension calcination cooling device, and the respective exhaust ends of the limestone powder preparation device are connected to the air inlet of the waste gas treatment device through a pipeline with a fan, and the exhaust port of the waste gas treatment device is connected to the air inlet of the waste gas treatment device through a pipeline with a fan. The piping is connected to the exhaust chimney. Through this structure, the large-scale production of fly lime can be realized, and at the same time, exhaust gas emission can be effectively controlled, environmental pollution can be reduced, and environmentally friendly production can be realized.

A powder filtering and collecting device is arranged between the exhaust end of the suspension calcination cooling device and the air inlet of the waste gas treatment device. Through the powder material filtering and collecting device, while reducing pollution, it is beneficial to recycle and reproduce the limestone powder discharged from the exhaust end of the suspension calcining cooling device, reduce waste of resources, and fully increase production.

The fan pipeline connected to the exhaust end of the suspension calcination cooling device is branched and connected to the air inlet of the limestone powder preparation device. Similarly, it is beneficial to recycle the limestone powder discharged from the exhaust end of the suspension calcination cooling device to the limestone powder preparation device for reproduction.

The utility model changes the traditional production structure of powdered lime, and uses the suspension calcination process to produce powdered lime. Not only is the whole process of production closed, it is not easy to cause environmental pollution, and the improved suspension calcination cooling equipment improves the heat utilization rate, thereby improving the production of powdered lime. Lime production efficiency and powder lime quality.

Description of drawings

Figure 1 is a schematic diagram of the overall structure, the dotted line in the figure indicates the air flow pipeline, and the arrow indicates the direction.

The serial numbers and names in the figure are: 1. Crushed limestone storage device, 2. Limestone powder preparation device, 3. Feeding device, 4. Suspension calcination cooling device, 401, cyclone delivery pipe, 402, cyclone return pipe, 403, material pipe , 404, inverted U-shaped air duct, 405, calciner, 5, pulverized coal supply end, 6, gas supply end, 7, first feed end, 8, second feed end, 9, fan outlet pipe, 10. Finished product storage device, 11. Powder filtering and collecting device, 12. Waste gas treatment device, 13. Exhaust chimney, C1, primary heating bucket, C2, secondary heating bucket, C3, third-level heating bucket, C4, Four-level heating bucket, C5, five-level heating bucket, CL1, first-level cooling bucket, CL2, second-level cooling bucket, CL3, third-level cooling bucket.

detailed description

Now in conjunction with accompanying drawing, the utility model is described as follows.

The powder lime suspension calcination production line includes crushed limestone storage device 1, limestone powder preparation device 2, feeding device 3, suspension calcination cooling device 4, fuel supply device, screening device, finished product storage device 10, waste gas treatment device 12, crushing The discharge end of the limestone storage device 1 is connected to the feed end of the limestone powder preparation device 2, the discharge end of the limestone powder preparation device 2 is connected to the feed end of the feeding device 3 through a conveying mechanism, and the discharge end of the feed device 3 Connect to the feed end of the suspension calcination cooling device 4. The screening device is arranged at the discharge end of the suspension calcination cooling device 4 , the fuel supply device includes a pulverized coal supply end 5 and a gas supply end 6 , and the discharge end of the screening device is connected to a finished product storage device 10 . The respective exhaust ends of the suspension calcination cooling device 4 and the limestone powder preparation device 2 are connected to the air inlet of the waste gas treatment device 12 through a pipeline with a fan, and the exhaust port of the waste gas treatment device 12 is connected to the exhaust port through a pipeline with a fan. A gas chimney 13, and a powder filtering and collecting device 11 is arranged between the exhaust end of the suspended calcination cooling device 4 and the air inlet of the waste gas treatment device 12, and the fan pipeline connected to the exhaust end of the suspended calcination cooling device 4 is branched and connected To the air inlet of limestone powder preparation device 2.

The suspension calcination cooling device 4 includes a preheating part, a calcining part, and a cooling part. The preheating part is provided with a first-level heating bucket C1, a second-level heating bucket C2, a third-level heating bucket C3, a fourth-level heating bucket C4, and a fifth-level heating bucket C5. , the calcining part is a decomposition furnace 405, and the cooling part is provided with a primary cooling bucket CL1, a secondary cooling bucket CL2, and a tertiary cooling bucket CL3. The sides of each heating hopper and cooling hopper are connected to the cyclone return pipe 402, and the bottom of each heating hopper and cooling hopper are connected to the material pipe 403. The cyclone delivery pipe 401 of the secondary heating hopper C2 is used as the feed end of the suspension calcining cooling device 4, and is connected to the primary heating The cyclone return pipe 402 of the bucket C1, the cyclone delivery pipe 401 of the primary heating bucket C1 is used as the exhaust end of the suspension calcination cooling device 4, the material pipe 403 of the primary heating bucket C1 is connected to the cyclone return pipe 402 of the secondary heating bucket C2 And the cyclone delivery pipe 401 of the third-level heating bucket C3, the material pipe 403 of the second-level heating bucket C2 is connected to the cyclone return pipe 402 of the third-level heating bucket C3 and the cyclone delivery pipe 401 of the fourth-level heating bucket C4, and the third-level heating bucket C3 The feed pipe 403 of the four-stage heating bucket C4 is connected to the cyclone return pipe 402 of the fourth-stage heating bucket C4 and the cyclone delivery pipe 401 of the five-stage heating bucket C5, and the material pipe 403 of the four-stage heating bucket C4 is connected to the decomposition furnace 405. The U-shaped air pipe 404 is connected to the cyclone return pipe 402 of the fifth-level heating bucket C5, the bottom of the decomposition furnace 405 is connected to the cyclone delivery pipe 401 of the first-level cooling bucket CL1, and the material pipe 403 of the fifth-level heating bucket C5 is connected to the second-level cooling bucket CL2 The cyclone delivery pipe 401 and the cyclone return pipe 402 of the primary cooling bucket CL1, the material pipe 403 of the primary cooling bucket CL1 is connected to the cyclone delivery pipe 401 of the third-stage cooling bucket CL3 and the cyclone return pipe 402 of the secondary cooling bucket CL2, The material pipe 403 of the secondary cooling hopper CL2 is connected to the cyclone return pipe 402 of the third-stage cooling hopper CL3, and the cyclone return pipe 402 of the third-stage cooling hopper CL3 is connected to the fan outlet pipe 9 and the first feed end 7 of the screening device , the material pipe 403 of the third-stage cooling bucket CL3 is connected to the second feed end 8 of the screening device; the pulverized coal supply end 5 of the fuel supply device is directly connected to the calciner 405, and the gas supply end 6 is branched and connected to the primary cooling The cyclone return pipe 402 of the bucket CL1, the cyclone return pipe 402 of the three-stage cooling bucket CL3 and the decomposition furnace 405. The above-mentioned connected cyclone supply pipe 401 and cyclone return pipe 402 can also be designed in one piece. The above-mentioned primary heating bucket C1 has a double-row structure, that is, two primary heating buckets C1 are arranged side by side, which is conducive to sufficient preheating.

The technological process of the powdered lime suspension calcination production line is as follows: the crushed limestone is transported from the discharge end of the crushed limestone storage device 1 to the limestone powder preparation device 2 to prepare limestone powder. The limestone powder prepared by the limestone powder preparation device 2 is transported to the feeding device 3 by the conveying mechanism, and then the limestone powder is evenly fed to the feeding end of the suspension calcining cooling device 4 by the feeding device 3, that is, the cyclone of the primary heating hopper C1 Return to tube 402. Air is supplied to the suspension calcination cooling device 4 by a fan, and the air flow passes through each cyclone delivery pipe 401, cyclone return pipe 402, material pipe 403 and inverted U-shaped air pipe 404 from bottom to top to communicate with each heating hopper of the suspension calcination cooling device 4, Calciner 405, cooling bucket. The pulverized coal supply end 5 of the fuel supply device directly supplies pulverized coal to the calciner 405, and the gas supply end 6 of the fuel supply device supplies the cyclone return pipe 402 of the first-stage cooling bucket CL1 and the cyclone return pipe of the third-stage cooling bucket CL3. 402 and the calciner 405 supply gas, the gas is fully mixed with the airflow, and burns in the calciner 405 . The specific process of suspension calcination is: the limestone powder falling into the cyclone return pipe 402 of the primary heating bucket C1 is sent to the primary stage along the cyclone return pipe 402 of the primary heating bucket C1 under the action of the airflow of the secondary heating bucket C2 cyclone delivery pipe 401 The gas and material are separated in the heating bucket C1 and preheated at the first level; the limestone powder after the first level preheating falls into the cyclone return pipe 402 of the second heating bucket C2 along the material pipe 403 of the first heating bucket C1, and is fed by the third heating bucket The air flow of the C3 cyclone delivery pipe 401 sends the limestone powder along the cyclone return pipe 402 of the secondary heating hopper C2 into the secondary heating hopper C2 for gas material separation and secondary preheating; The material pipe 403 of the heating bucket C2 falls into the cyclone return pipe 402 of the third-stage heating bucket C3, and the limestone powder is sent to the third-stage along the cyclone return pipe 402 of the third-stage heating bucket C3 by the airflow of the fourth-stage heating bucket C4 cyclone delivery pipe 401 The gas material is separated in the heating hopper C3 and preheated in the third stage; the limestone powder after the third stage preheating falls into the cyclone return pipe 402 of the fourth heating hopper C4 along the material pipe 403 of the third heating hopper C3, and is fed by the fifth heating hopper The air flow of the C5 cyclone delivery pipe 401 sends the limestone powder along the cyclone return pipe 402 of the fourth-stage heating hopper C4 into the fourth-stage heating hopper C4 for gas-material separation and four-stage preheating; the limestone powder after the fourth-stage preheating The material pipe 403 of the heating hopper C4 falls into the calciner 405, and the calcining temperature in the calciner 405 is controlled to be 850-1000°C, and the calcining time is within 10 seconds. The lime powder in the furnace 405 is sent into the five-stage heating hopper C5 along the inverted U-shaped air pipe 404 on the top of the calciner 405 and the cyclone return pipe 402 of the five-stage heating hopper C5 to carry out gas-material separation and maintain sufficient reaction. The lime powder in the fifth-stage heating hopper C5 falls into the cyclone return pipe 402 of the first-stage cooling hopper CL1 along the material pipe 403 of the fifth-stage heating hopper C5, and the lime powder is transported along the first-stage cooling hopper CL2 by the airflow of the cyclone delivery pipe 401 of the second-stage cooling hopper. The cyclone return pipe 402 of the cooling bucket CL1 is sent into the primary cooling bucket CL1 for gas material separation and primary cooling; the lime powder after primary cooling falls into the secondary cooling bucket CL2 along the material pipe 403 of the primary cooling bucket CL1 Cyclone return pipe 402, the lime powder is sent into the secondary cooling bucket CL2 along the cyclone return pipe 402 of the secondary cooling bucket CL2 by the airflow of the third-stage cooling bucket CL3 cyclone delivery pipe 401 for gas material separation and secondary cooling; The cooled lime powder falls into the cyclone return pipe 402 of the tertiary cooling hopper CL3 along the material pipe 403 of the secondary cooling hopper CL2, and part of the undecomposed limestone powder or materials fall into the first feeding end 7 of the sieving device; The lime powder in the cyclone return pipe 402 of the third-stage cooling bucket CL3 is sent into the third-stage cooling bucket CL3 along the cyclone return pipe 402 of the third-stage cooling bucket CL3 by the airflow of the fan outlet pipe 9 for gas-material separation and three-stage cooling. The first-stage cooled lime powder falls into the second feeding end 8 of the sieving device. The materials at the first feeding end 7 and the second feeding end 8 are sieved by a sieving device to obtain finished powdered lime, and the finished powdered lime is transported to a finished product storage device 10 for storage. Part of the materials discharged from the exhaust ends of the limestone powder preparation device 2 and the suspension calcination cooling device 4 are filtered and sieved by the powder filter collection device 11, then processed by the waste gas treatment device 12 and discharged from the exhaust chimney, and the other part is passed through the pipe The road is re-sent to the limestone powder preparation device 2 for further production and utilization. The above is the whole process flow for the preparation of powdered lime of the present invention.

Claims (6)

1. a powder lime suspension calcining production line, it includes that suspension calcining chiller (4), fuel supply system, sieve material fill Putting, sieve material device is arranged at the discharge end of suspension calcining chiller (4), fuel supply system include coal dust supply side (5) and Fuel gas supply end (6)；It is characterized in that described suspension calcining chiller (4) includes regenerator section, calcining part, cooling end Point, regenerator section include one-level heating bucket (C1), two grades heating bucket (C2), three grades heating bucket (C3), level Four heating bucket (C4), five Level heating bucket (C5), calcining part is dore furnace (405), and cooling segment includes one-level cooling bucket (CL1), two grades of cooling buckets (CL2), three grades of coolings bucket (CL3), the top of each heating bucket and cooling bucket is all connected with whirlwind and send pipe (401), and each heating struggles against and cold But the side struggled against is all connected with whirlwind return pipe (402), and each bottom heating bucket and cooling bucket is all connected with material and manages (403), described two grades Heating bucket (C2) whirlwind send pipe (401) as the feed end of suspension calcining chiller (4), and be connected to described one-level heat The whirlwind return pipe (402) of bucket (C1), the whirlwind of one-level heating bucket (C1) send pipe (401) as described suspension calcining chiller (4) exhaust end, the material pipe (403) of one-level heating bucket (C1) is connected to the whirlwind return pipe (402) of described two grades of heating bucket (C2) And the whirlwind of three grades of heating bucket (C3) send pipe (401), the material pipe (403) of two grades of heating bucket (C2) to be connected to described three grades of heating buckets (C3) whirlwind return pipe (402) and the whirlwind of level Four heating bucket (C4) send pipe (401), the material pipe (403) of three grades of heating bucket (C3) The whirlwind of the whirlwind return pipe (402) and Pyatyi heating bucket (C5) that are connected to level Four heating bucket (C4) send pipe (401), level Four heating bucket (C4) material pipe (403) is connected in described dore furnace (405), and inverted U-shaped airduct (404) and institute are passed through in dore furnace (405) top The whirlwind return pipe (402) stating Pyatyi heating bucket (C5) connects, and dore furnace (405) bottom connects described one-level cooling bucket (CL1) The whirlwind that whirlwind send pipe (401), the material pipe (403) of described Pyatyi heating bucket (C5) to be connected to described two grades of coolings bucket (CL2) send Pipe (401) and the whirlwind return pipe (402) of one-level cooling bucket (CL1), the material pipe (403) of one-level cooling bucket (CL1) is connected to described The whirlwind of three grades of coolings bucket (CL3) send pipe (401) and the whirlwind return pipe (402) of two grades of coolings bucket (CL2), two grades of cooling buckets (CL2) material pipe (403) is connected to the whirlwind return pipe (402) of three grades of coolings bucket (CL3), and the whirlwind of three grades of coolings bucket (CL3) returns Pipe (402) is connected to blower fan discharge pipe (9) and first feed end (7) of sieve material device, the material pipe of three grades of coolings bucket (CL3) (403) second feed end (8) of described sieve material device it is connected to；The coal dust supply side (5) of described fuel supply system directly connects Being connected in described dore furnace (405), described fuel gas supply end (6) branch is connected to the whirlwind of described one-level cooling bucket (CL1) and returns Pipe (402), the whirlwind return pipe (402) of described three grades of coolings bucket (CL3) and described dore furnace (405).

Powder lime suspension calcining production line the most according to claim 1, it is characterised in that described in the whirlwind that connects send pipe (401) with whirlwind return pipe (402) be integral type pipe.

Powder lime whirlwind the most according to claim 1 calcining production line, it is characterised in that described one-level heating bucket (C1) is Double column structure, i.e. two one-levels heating bucket (C1) are set up in parallel.

Powder lime suspension calcining production line the most according to claim 1, it is characterised in that this production line also includes rubble ash Stone storage device (1), agstone preparation facilities (2), drawing-in device (3), finished product storage device (10), emission-control equipment (12), the discharge end of rubble lime stone storage device (1) is connected to the feed end of agstone preparation facilities (2), agstone system The discharge end of standby device (2) connects the feed end of drawing-in device (3) by conveying mechanism, and the discharge end of drawing-in device (3) connects To the feed end of described suspension calcining chiller (4), the discharge end of described sieve material device connects described finished product storage device (10), the respective exhaust end pipeline by band blower fan of described suspension calcining chiller (4), agstone preparation facilities (2) Being connected to the air inlet of emission-control equipment (12), the air vent of emission-control equipment (12) is connected to by the pipeline of band blower fan Exhaust chimney (13).

Powder lime suspension calcining production line the most according to claim 4, it is characterised in that described suspension calcining chiller (4) between exhaust end and the air inlet of described emission-control equipment (12), powder device for filtering and collecting (11) is set.

Powder lime suspension calcining production line the most according to claim 4, it is characterised in that described suspension calcining chiller (4) the pipeline of fans branch that exhaust end is connected is connected to the air inlet of described agstone preparation facilities (2).