CN216964022U

CN216964022U - Lime kiln gas treatment facility

Info

Publication number: CN216964022U
Application number: CN202121409575.0U
Authority: CN
Inventors: 朱建华; 何雨时; 唐卫国; 陈道远; 朱跃斌
Original assignee: Guangxi Xingye Shitai Nano Technology Co ltd
Current assignee: Guangxi Xingye Shitai Nano Technology Co ltd
Priority date: 2021-06-22
Filing date: 2021-06-22
Publication date: 2022-07-15
Anticipated expiration: 2031-06-22

Abstract

The utility model discloses lime kiln gas treatment equipment which comprises a kiln gas treatment equipment main body, wherein a heat recovery device, a bag type dust collector, an auxiliary washing tower, a filler spray tower and a centrifugal water mist separator are sequentially arranged on the kiln gas treatment equipment main body, a gas connecting pipe is connected between the heat recovery device and the bag type dust collector, the gas connecting pipe is also connected between the bag type dust collector and the auxiliary washing tower, a first exhaust fan is arranged on the gas connecting pipe between the bag type dust collector and the auxiliary washing tower, the lower end of the filler spray tower is connected with a liquid storage separation box, and the gas outlet end of the auxiliary washing tower is connected with the gas inlet end of the filler spray tower. The lime kiln gas treatment equipment is provided with the heat recovery device, the bag type dust collector and the washing tower, the washing tower can be used for washing and purifying kiln gas through a detergent, washing water is supplied to the washing tower through the primary circulating pump, the kiln gas can be washed by being fused with the detergent after being wetted, and the purification efficiency of the kiln gas is improved.

Description

Lime kiln gas treatment equipment

Technical Field

The utility model relates to the technical field of kiln gas treatment equipment, in particular to lime kiln gas treatment equipment.

Background

The kiln gas purification device is applied to kiln gas discharged by a lime kiln, and is used for a carbonization section in calcium carbonate production after being washed, wherein the calcium carbonate carbonization section has the following requirements on the use of the kiln gas: the dust content is lower than 5mg/m3, the sulfur dioxide is lower than 100mg/m3, and the indexes of kiln gas discharged by the lime kiln are as follows: the dust content is 600mg/m3, and the sulfur dioxide content is 400mg/m 3. In order to meet the use requirements of the kiln gas, the kiln gas needs to be purified

The existing kiln gas purification treatment adopts a two-stage design, firstly adopts a stone packed tower to carry out spray washing, then removes water through a gas-liquid separation tank, and then sends the kiln gas to a production line for use; because the process is too simple, the purification efficiency of the dust in the kiln gas is low, the water carrying capacity is large, and the washed gas is used in the carbonization stage of calcium carbonate, so that the whiteness of a calcium carbonate product is low, black spots exist, the product quality is influenced, the purification effect is not comprehensive enough, and the purification efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide lime kiln gas treatment equipment to solve the problems that the prior art has low purification efficiency of dust in kiln gas during the purification treatment of the kiln gas in the market and large water carrying capacity, and the washed gas is often used in the carbonization stage of calcium carbonate to cause low whiteness and black spots of calcium carbonate products, influence on product quality, and cause incomplete purification effect and low purification efficiency.

In order to achieve the purpose, the utility model provides the following technical scheme: a lime kiln gas treatment device comprises a kiln gas treatment device main body, wherein a heat recovery device, a bag type dust collector, a washing auxiliary tower, a filler spray tower and a centrifugal water mist separator are sequentially arranged on the kiln gas treatment device main body, a gas connecting pipe is connected between the heat recovery device and the bag type dust collector, a gas connecting pipe is also connected between the bag type dust collector and the washing auxiliary tower, and a first exhaust fan is arranged on a gas connecting pipe between the bag type dust collector and the washing auxiliary tower, the lower end of the packing spray tower is connected with a liquid storage separation box, and the upper and lower ends of the inner side of the liquid storage separation box are respectively provided with a liquid storage cavity and a sedimentation hopper, one side of the liquid storage cavity is connected with a washing water inlet pipe, the other side of the liquid storage cavity is provided with a desulfurization washing water circulating pump, and a washing water distribution pipe is arranged on the desulfurization washing water circulating pump, and the air outlet end of the washing auxiliary tower is connected with the air inlet end of the filler spray tower.

Preferably, the lower end of the heat recovery device is connected with a kiln gas inlet pipe through a flange structure, a waste heat recovery pipe is installed in the heat recovery device, the two ends of the waste heat recovery pipe are respectively connected with a water inlet pipe and a water outlet pipe through flange structures, and an ash discharge valve is installed at the lower end of the bag type dust collector.

Preferably, the upper end of the inner side of the auxiliary washing tower is provided with a spray pipe distributed in a net structure, the lower end of the spray pipe is uniformly provided with an atomizing nozzle, and the inner side of the auxiliary washing tower is also uniformly provided with a washing screen plate.

Preferably, the manhole is evenly installed on the side surface of the packing spray tower, the spray pipes distributed in a net structure are arranged on the inner side of the packing spray tower, packing is arranged below the spray pipes on the inner side of the packing spray tower, and the spray pipes in the washing auxiliary tower and the packing spray tower are connected with the washing water distribution pipe.

Preferably, a second exhaust fan is arranged between the filler spray tower and the centrifugal water mist separator, and a gas discharge pipe is connected to the second exhaust fan.

Preferably, the lower end of the precipitation bucket is provided with a desulfurization water discharge pipe, and a sewage pump is installed on the desulfurization water discharge pipe.

Compared with the prior art, the utility model has the beneficial effects that: the lime kiln gas treatment equipment is provided with the heat recovery device, the bag type dust collector and the washing tower, the washing tower can be used for washing and purifying kiln gas through a detergent, washing water is supplied to the washing tower through the primary circulating pump, the kiln gas can be washed by being fused with the detergent after being wetted, and the purification efficiency of the kiln gas is improved. According to the lime kiln gas treatment equipment, the multiple layers of washing screen plates are uniformly arranged in the washing tower, so that the kiln gas can be washed layer by layer, and meanwhile, the multiple layers of washing screen plates can improve the contact time of the kiln gas and a detergent and improve the washing efficiency.

Drawings

FIG. 1 is a schematic structural diagram of a lime kiln gas treatment device of the present invention;

FIG. 2 is a schematic structural diagram of an auxiliary washing tower and a packing spray tower of the lime kiln gas treatment equipment of the utility model;

FIG. 3 is a top view of the connection between the washing sub-tower and the packing spray tower of the lime kiln gas treatment equipment of the utility model.

In the figure: 1. kiln gas treatment equipment main body, 2, heat recovery device, 3, waste heat recovery pipe, 4, water inlet pipe, 5, kiln gas inlet pipe, 6, water outlet pipe, 7, gas connecting pipe, 8, dust discharge valve, 9, bag type dust collector, 10, first exhaust fan, 11, washing water inlet pipe, 12, liquid storage separation box, 13, desulfurization water discharge pipe, 14, sewage pump, 15, washing auxiliary tower, 16, gas discharge pipe, 17, second exhaust fan, 18, centrifugal water mist separator, 19, manhole, 20, filler spray tower, 21, washing water pipe, 22, desulfurization washing water circulating pump, 23, spray pipe, 24, atomizing nozzle, 25, washing screen plate, 26, filler, 27, liquid storage cavity, 28, precipitation bucket.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a lime kiln gas treatment device comprises a kiln gas treatment device main body 1, a heat recovery device 2, a bag type dust collector 9, a washing auxiliary tower 15, a packing spray tower 20 and a centrifugal water mist separator 18 are sequentially arranged on the kiln gas treatment device main body 1, a gas connecting pipe 7 is connected between the heat recovery device 2 and the bag type dust collector 9, the lower end of the heat recovery device 2 is connected with a kiln gas inlet pipe 5 through a flange structure, a waste heat recovery pipe 3 is arranged in the heat recovery device 2, two ends of the waste heat recovery pipe 3 are respectively connected with a water inlet pipe 4 and a water outlet pipe 6 through flange structures, an ash discharge valve 8 is arranged at the lower end of the bag type dust collector 9, the structure can carry out cooling treatment on kiln gas discharged by the lime kiln through the heat recovery device 2, the damage of kiln gas temperature to post-stage treatment equipment is avoided, the heat recovery device 2 carries out heat exchange treatment through cooling water in the kiln gas waste heat recovery pipe 3, the cooling water in the waste heat recovery pipe 3 is heated, the heated water can be used for lime slaking production, the slaking yield and the slaking quality are improved, the bag-type dust collector 9 can well remove dust, the recovered dust can also be used as a raw material for producing lime calcium, the spray pipes 23 distributed in a net structure are arranged at the upper end of the inner side of the washing auxiliary tower 15, the atomizing spray heads 24 are uniformly arranged at the lower ends of the spray pipes 23, the washing screen plate 25 is also uniformly arranged at the inner side of the washing auxiliary tower 15, the kiln gas desulfurization device formed by the washing auxiliary tower 15 and the packing spray tower 20 in the structure can effectively improve the desulfurization effect, the discharged kiln gas can reach the standard, the manhole 19 is uniformly arranged at the side surface of the packing spray tower 20, the spray pipes 23 distributed in a net structure are also arranged at the inner side of the packing spray tower 20, the packing 26 is arranged below the spray pipes 23 at the inner side of the packing spray tower 20, and the spray pipes 23 in the washing auxiliary tower 15 and the packing spray tower 20 are both connected with the washing water pipe 21, the manhole 19 of the structure is used for overhauling the filler spray tower 20, the spray pipe 23 can spray out the washing liquid through the atomizing nozzle 24, so that the kiln gas and the washing liquid are fully contacted on the washing screen plate 25, the washing effect of the kiln gas is improved, the filler 26 is used for further adsorption and purification treatment of the kiln gas, the gas connecting pipe 7 is also connected between the bag type dust collector 9 and the washing auxiliary tower 15, the first exhaust fan 10 is installed on the gas connecting pipe 7 between the bag type dust collector 9 and the washing auxiliary tower 15, the lower end of the filler spray tower 20 is connected with the liquid storage separation box 12, the second exhaust fan 17 is installed between the filler spray tower 20 and the centrifugal water mist separator 18, and the gas discharge pipe 16 is connected on the second exhaust fan 17, the first exhaust fan 10 and the second exhaust fan 17 of the structure are both the existing exhaust fan structure and are used for guiding the operation of the kiln gas in the kiln gas treatment equipment main body 1, the centrifugal water mist separator 18 is a structure used for separating water mist on the existing kiln gas treatment equipment, so that liquid in the kiln gas can enter the liquid storage and separation tank 12 through the centrifugal water mist separator 18, and the upper and lower ends of the inner side of the liquid storage separation box 12 are respectively provided with a liquid storage cavity 27 and a sedimentation bucket 28, one side of the liquid storage cavity 27 is connected with a washing water inlet pipe 11, the other side of the liquid storage cavity 27 is provided with a desulfurization washing water circulating pump 22, and a washing water pipe 21 is arranged on the desulfurization washing water circulating pump 22, a desulfurization water discharge pipe 13 is arranged at the lower end of the precipitation bucket 28, and the desulfurization water discharge pipe 13 is provided with a sewage discharge pump 14, the precipitation bucket 28 with the structure can precipitate the washing liquid discharged to the lower end from the auxiliary washing tower 15, the centrifugal water mist separator 18 and the packing spray tower 20, the washing dirt generated after the precipitation treatment can be discharged through the desulfurization water discharge pipe 13, and the air outlet end of the auxiliary washing tower 15 is connected with the air inlet end of the packing spray tower 20.

The working principle is as follows: when the lime kiln gas treatment equipment is used, firstly lime kiln gas enters the heat recovery device 2 through the kiln gas inlet pipe 5, then the heat exchange treatment is carried out on the kiln gas and the waste heat recovery pipe 3 in the heat recovery device 2 to cool the kiln gas, meanwhile, cooling water in the waste heat recovery pipe 3 is heated, the water inlet pipe 4 and the water outlet pipe 6 are respectively used for the water inlet and outlet treatment of the waste heat recovery pipe 3, when the kiln gas is discharged from the heat recovery device 2, the kiln gas enters the bag type dust remover 9 through the gas connecting pipe 7 to carry out dust removal treatment, the dust removal valve 8 can be used for the dust removal treatment of the bag type dust remover 9, when the kiln gas is discharged from the bag type dust remover 9, the first exhaust fan 10 introduces the cooled and dedusted kiln gas into the auxiliary washing tower 15 through the gas connecting pipe 7, the spray pipe 23 in the auxiliary washing tower 15 sprays washing liquid from the atomizing nozzle 24 through the washing water pipe 21 to wash the kiln gas, the washing screen plate 25 can fully mix the washing liquid with the kiln gas for enough time, so as to improve the washing effect, the kiln gas is washed in the auxiliary washing tower 15 and then discharged into the filler spray tower 20 from the lower part of the auxiliary washing tower 15, then the kiln gas in the filler spray tower 20 moves upwards, is adsorbed and purified by the filler 26, and is sprayed and purified by the spray pipe 23 in the filler spray tower 20 again, the washing water pipe 21 pumps the washing liquid in the liquid storage cavity 27 through the desulphurization washing water circulating pump 22, the washing liquid washed in the auxiliary washing tower 15 and the filler spray tower 20 is directly discharged into the liquid storage separation box 12 for separation and precipitation treatment, the clear liquid in the liquid storage cavity 27 at the upper end can be recycled, the precipitate generated at the lower end of the precipitation hopper 28 can be discharged through the desulphurization water discharge pipe 13 under the action of the sewage discharge pump 14, the washing liquid in the liquid storage cavity 27 is discharged into the washing liquid inlet pipe 11 for treatment, the manhole 19 is used for overhauling and checking the filler spray tower 20, when kiln gas is treated by the filler spray tower 20 and then enters the centrifugal water mist separator 18, the centrifugal water mist separator 18 separates water mist, liquid enters the liquid storage separation box 12, the kiln gas is discharged from the gas discharge pipe 16 under the action of the second exhaust fan 17 and reaches the standard, the high-efficiency treatment of the kiln gas by the kiln gas treatment equipment main body 1 is completed, and therefore a series of work is completed.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the utility model can be made, and equivalents and modifications of some features of the utility model can be made without departing from the spirit and scope of the utility model.

Claims

1. The utility model provides a lime kiln gas treatment facility, includes kiln gas treatment facility main part (1), its characterized in that: the kiln gas treatment equipment comprises a kiln gas treatment equipment main body (1), wherein a heat recovery device (2), a bag type dust collector (9), a washing auxiliary tower (15), a packing spray tower (20) and a centrifugal water mist separator (18) are sequentially arranged on the kiln gas treatment equipment main body (1), a gas connecting pipe (7) is connected between the heat recovery device (2) and the bag type dust collector (9), the gas connecting pipe (7) is also connected between the bag type dust collector (9) and the washing auxiliary tower (15), a first exhaust fan (10) is arranged on the gas connecting pipe (7) between the bag type dust collector (9) and the washing auxiliary tower (15), the lower end of the packing spray tower (20) is connected with a liquid storage separation box (12), the upper end and the lower end of the inner side of the liquid storage separation box (12) are respectively provided with a liquid storage cavity (27) and a precipitation hopper (28), one side of the liquid storage cavity (27) is connected with a washing water inlet pipe (11), and the other side of the liquid storage cavity (27) is provided with a desulfurization washing water circulating pump (22), and a washing water pipe (21) is arranged on the desulfurization washing water circulating pump (22), and the air outlet end of the washing auxiliary tower (15) is connected with the air inlet end of the filler spray tower (20).

2. The lime kiln gas treatment plant according to claim 1, characterized in that: the kiln gas inlet pipe (5) is connected to the lower end of the heat recovery device (2) through a flange structure, the waste heat recovery pipe (3) is installed in the heat recovery device (2), the two ends of the waste heat recovery pipe (3) are respectively connected with the water inlet pipe (4) and the water outlet pipe (6) through flange structures, and the ash discharge valve (8) is installed at the lower end of the bag type dust collector (9).

3. The lime kiln gas treatment plant according to claim 1, characterized in that: the spray pipe (23) that are network structure and distribute is equipped with to wash auxiliary tower (15) inboard upper end, and spray pipe (23) lower extreme evenly installs atomizer (24), wash auxiliary tower (15) inboard still evenly installs washing otter board (25).

4. The lime kiln gas treatment plant according to claim 1, characterized in that: manhole (19) are evenly installed to filler spray column (20) side, and filler spray column (20) inboard also is equipped with shower (23) that are network structure and distribute, the below of the inboard shower (23) of filler spray column (20) all is equipped with filler (26), and shower (23) in washing auxiliary tower (15) and filler spray column (20) all are connected with washing moisture water pipe (21).

5. The lime kiln gas treatment plant according to claim 1, characterized in that: a second exhaust fan (17) is arranged between the packing spray tower (20) and the centrifugal water mist separator (18), and a gas discharge pipe (16) is connected to the second exhaust fan (17).

6. The lime kiln gas treatment plant according to claim 1, characterized in that: the lower end of the precipitation hopper (28) is provided with a desulfurization water discharge pipe (13), and the desulfurization water discharge pipe (13) is provided with a sewage pump (14).