CN111704111A - Sulphur granulation and exhaust-gas treatment system under water - Google Patents
Sulphur granulation and exhaust-gas treatment system under water Download PDFInfo
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- CN111704111A CN111704111A CN202010700304.4A CN202010700304A CN111704111A CN 111704111 A CN111704111 A CN 111704111A CN 202010700304 A CN202010700304 A CN 202010700304A CN 111704111 A CN111704111 A CN 111704111A
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- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 219
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 102
- 238000005469 granulation Methods 0.000 title claims abstract description 71
- 230000003179 granulation Effects 0.000 title claims abstract description 71
- 239000005864 Sulphur Substances 0.000 title description 11
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 199
- 239000011593 sulfur Substances 0.000 claims abstract description 199
- 239000007788 liquid Substances 0.000 claims abstract description 92
- 239000002912 waste gas Substances 0.000 claims abstract description 83
- 239000007787 solid Substances 0.000 claims abstract description 57
- 238000001035 drying Methods 0.000 claims abstract description 45
- 238000000926 separation method Methods 0.000 claims abstract description 40
- 238000002844 melting Methods 0.000 claims abstract description 35
- 230000008018 melting Effects 0.000 claims abstract description 35
- 238000005406 washing Methods 0.000 claims abstract description 35
- 238000009826 distribution Methods 0.000 claims abstract description 29
- 238000004321 preservation Methods 0.000 claims abstract description 29
- 239000002245 particle Substances 0.000 claims abstract description 23
- 238000005507 spraying Methods 0.000 claims abstract description 21
- 239000000843 powder Substances 0.000 claims abstract description 14
- 238000007664 blowing Methods 0.000 claims description 16
- 239000007921 spray Substances 0.000 claims description 15
- 239000007789 gas Substances 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 10
- 238000004062 sedimentation Methods 0.000 claims description 10
- 238000005192 partition Methods 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 5
- 238000002955 isolation Methods 0.000 claims description 2
- 238000005453 pelletization Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 230000018044 dehydration Effects 0.000 abstract description 9
- 238000006297 dehydration reaction Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 7
- 239000012798 spherical particle Substances 0.000 abstract description 4
- 239000000047 product Substances 0.000 description 25
- 239000000428 dust Substances 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 7
- 238000005550 wet granulation Methods 0.000 description 6
- 238000010924 continuous production Methods 0.000 description 5
- 239000008187 granular material Substances 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000003721 gunpowder Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 239000012263 liquid product Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005504 petroleum refining Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000012265 solid product Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/02—Preparation of sulfur; Purification
- C01B17/0237—Converting into particles, e.g. by granulation, milling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses an underwater sulfur granulation and waste gas treatment system, which comprises a granulation host, a heat-preservation forming pool, a liquid sulfur inlet pipeline, an anti-splashing distribution device, a waste gas collecting cover and a waste gas washing and spraying device, wherein the heat-preservation forming pool, the liquid sulfur inlet pipeline, the anti-splashing distribution device, the waste gas collecting cover and the waste gas washing and spraying device are arranged above the granulation host; a drying dehydration device, a water-solid separation device, a fine powder sulfur screw conveyor, a sulfur melting device and a circulating water return device are arranged below the granulation main machine. The underwater sulfur granulation and waste gas treatment system provided by the invention can realize that liquid sulfur can be rapidly formed into spherical particles in the granulation system, the spherical particles have smooth surfaces, uniform particle sizes, extremely low water content and high production efficiency, and waste gas discharged in the liquid sulfur forming process is treated, so that the operation environment is greatly improved, clean production is realized, energy is saved, emission is reduced, and the environment-friendly requirement is met.
Description
Technical Field
The invention relates to the technical field of sulfur granulation and forming equipment, in particular to an underwater sulfur granulation system and an exhaust gas treatment system.
Background
Sulfur is used as a chemical product and widely applied to the industries of chemical fertilizer, gunpowder, medicine, textile, leather and the like. In the processing process of industries such as coal chemical industry, natural gas, petroleum refining and the like, a large amount of liquid sulfur products are by-produced, and are limited in storage, transportation and safety, a small part of the sulfur products leave a factory in a liquid product mode, and a large part of the sulfur products leave a factory in a solid product mode. The liquid sulfur needs to be solidified and formed, and the types of the liquid sulfur include block, sheet and granular, and along with the improvement of industrial technology and the improvement of transportation, packaging, environmental protection and energy saving requirements, granular solid sulfur products gradually replace block and sheet solid sulfur and are widely applied in industry.
At present, the granular sulfur forming process applied in industry mainly comprises rotary steel belt granulation, tower type air granulation, roller guniting granulation, underwater wet granulation and the like, ⑴ rotary steel belt granulation, wherein the product is in a hemispherical shape, the sulfur granules are uniform, the product rate is high, water is not contained, but the forming capacity is small, dust is more, the service life of the steel belt is short, and H exists in the forming process2S、SO2The ⑵ tower air granulation has spherical product, homogeneous sulfur particle, high product yield, less dust, no water, great forming capacity, high reliability of no rotating part, high investment, high power consumption, ⑶ roller spraying granulation with high product yield, no water, low dust, great forming capacity, uneven sulfur particle size, great operation fluctuation, more rotating parts, regular cleaning of the inner wall of the roller, high labor strength, no clean environment and high investment, ⑷ underwater wet granulation with homogeneous sulfur particle, high product yield, less dust, great forming capacity, small floor area, high reliability of no rotating part, clean operation environment and high water content.
With the development of industries such as coal chemical industry, natural gas exploitation, petroleum processing and the like, the requirement of environmental protection standard is higher and higher, the quantity of sulfur recovery devices and the scale of byproduct sulfur which are matched with the industries are also larger and larger, the requirements on the sulfur forming process technology and the equipment level are also higher and higher, the application of the underwater wet granulation technology is also wider and wider, and the technologies which are already applied in the industry are as follows: SIM, Hess OilVirgin Island, Defco Wet, Smth&Ardusi et al, domestic largest sulphur recovery device-Zhongpetrochemical Puguang gas field 240The ten thousand ton/year sulfur recovery is that the Devico Wet underwater Wet granulation technology is adopted, the production operation is over 5 years, the sulfur recovery devices of other domestic factories such as Luoyang oil refineries, China Petroleum Ningxia petrochemical company, Shandong Dongyngpetrochemical industry, Daliang Hengchanglietization and the like all adopt the underwater Wet granulation technology, the production operation is relatively stable, although the Wet granulation technology is stable in actual operation, the problem is that ⑴ liquid sulfur releases trace waste gas (H) after entering a distributor2S、SO2Sulphur steam) to the operating environment, ⑵ production process has the liquid sulphur of distributor splashes all around, solidification caking, ⑶ finished product sulphur granule water content is greater than 2%, ⑷ vibrations dehydration sieve separation process produces granule and smashes formation powder quantity is more, ⑸ deposit sulphur powder secondary sulphur melting facility sulphur melt sulphur incompletely, caking jam problem.
Disclosure of Invention
The invention provides a corresponding solution for the problems in industrial application, and provides an underwater sulfur granulating system and a waste gas treatment system, which can realize that liquid sulfur can be quickly formed into spherical particles in the granulating system, the surfaces of the spherical particles are smooth and uniform in granularity, the water content is extremely low, the production efficiency is high, and the waste gas discharged in the liquid sulfur forming process is treated, so that the clean production environment is realized, the operation environment is improved, the energy is saved, the emission is reduced, and the environment-friendly requirement is met.
The invention is realized by the following technical scheme:
an underwater sulfur granulation system and a waste gas treatment system comprise a granulation host, and a heat-preservation forming pool, a liquid sulfur inlet pipeline, an anti-splashing distribution device, a waste gas collecting cover and a waste gas spraying and washing device which are arranged above the granulation host; a drying dehydration device, a water-solid separation device, a fine powder sulfur screw conveyor, a sulfur melting device and a circulating water return device are arranged below the granulation main machine.
Furthermore, overflow grooves are arranged on two sides of the granulation host machine, and the outlet ends of the overflow grooves are communicated with a dehydration pool in the drying dehydration device; the bottom of the granulation main machine is provided with a plurality of water inlets and discharge ports; each water inlet is communicated with a circulating water return device; each discharge port is connected with a drying and dehydrating device through a discharge pipe, and an automatic control valve is arranged between the discharge pipe and the discharge port.
Furthermore, the bottom plate of the heat-preservation forming pool is an arc-shaped plate protruding downwards, and a plurality of forming holes for liquid sulfur to drip are formed in the bottom plate of the heat-preservation forming pool; and a waste gas collecting cover is arranged above the heat-insulating forming tank, and the heat-insulating forming tank is fixed on a bracket beside the granulation main machine.
Further, the anti-splashing distribution device is fixedly connected with the liquid sulfur inlet pipeline; the bottom of the anti-splashing distribution device is provided with four through holes which are symmetrical in pairs, and the central axes of the through holes are symmetrically distributed on two sides of the liquid sulfur inlet pipeline.
Further, the waste gas collect the cover and be used for collecting the volatile waste gas of liquid sulphur, the export of waste gas collection cover is linked together with waste gas washing spray set's import.
Furthermore, a steam-water separation plate is longitudinally arranged in the waste gas washing and spraying device, a gas outlet of the waste gas washing and spraying device is communicated with an exhaust fan, and a liquid outlet of the waste gas washing and spraying device is communicated with a feeding pool in the water-solid separation device.
Further, the drying and dehydrating device comprises a vibration dehydrating screen arranged in the sealing cover, an air knife above the vibration dehydrating screen, a reciprocating motor, an air compressor, a blowing device, a solid sulfur finished product outlet and a dehydrating tank below the vibration dehydrating screen, wherein the air knife comprises a hard circular tube of which the bottom is provided with an air outlet;
the inlet of each drying and dehydrating device is connected with the discharge hole in the granulation host machine through a discharge pipe, and the drying and dehydrating devices are controlled to be in an opening or standby state by controlling the starting and stopping of the automatic control valve; the air knife positioned above the vibration dewatering screen is respectively connected with the reciprocating motor and the air compressor, and the reciprocating motor drives the air knife to reciprocate on the slide rail of the sealing cover; the outlet end of the dewatering pool below the vibrating dewatering screen is communicated with the feeding pool in the water-solid separation device, and the solid outlet end of the drying dewatering device is communicated with the solid sulfur finished product outlet; the outlet of the solid sulfur finished product is provided with a blowing device which is used for blowing hot air in the opposite direction of the solid sulfur particle discharging direction.
Further, the water-solid separation device comprises a feeding tank, a concentration tank, a feeding pump, a cyclone for solid-liquid separation, a sedimentation tank and a clean water tank; the outlet end of the dewatering tank is communicated with the feeding tank, and the outlet of the feeding tank is communicated with the inlet of a solid-liquid separation cyclone through a feeding pump; the underflow port of the solid-liquid separation cyclone is communicated with the concentration tank, and the overflow port of the solid-liquid separation cyclone is communicated with the sedimentation tank arranged beside the concentration tank; the clear water on the upper layer of the sedimentation tank is introduced into a clear water tank through an overflow partition plate; the clean water tank is communicated with the circulating water return device through a circulating water pump, and the clean water tank is communicated with the inlet end of the waste gas washing and spraying device.
Further, the fine powder sulfur screw conveyor is obliquely arranged on the concentration tank; the lower end of the fine powder sulfur screw conveyor is positioned at the bottom of the concentration tank, and the upper end of the fine powder sulfur screw conveyor is communicated with the sulfur melting device and is used for conveying sulfur powder precipitated at the bottom of the concentration tank to the sulfur melting device.
Furthermore, the sulfur melting device comprises a sulfur melting tank, a liquid sulfur pump and a partition plate in the sulfur melting tank, wherein a melting medium in the sulfur melting tank flows into the anti-splashing distribution device through a melting pipeline, and the liquid sulfur in the sulfur melting tank is connected with an inlet of the anti-splashing distribution device through the liquid sulfur pump.
Compared with the prior art, the invention has the following technical characteristics:
the invention discloses an underwater sulfur granulating and waste gas treating system, which comprises a granulating host and a heat-insulating forming pool arranged above the granulating host, wherein an anti-splashing distribution device is arranged above the heat-insulating forming pool, a plurality of through holes for liquid sulfur to flow out are formed at the bottom of the anti-splashing distribution device, so that the hydraulic pressure of the sulfur flowing out quickly from a liquid sulfur inlet pipeline is buffered, the outflow pressure of the liquid sulfur is reduced, the liquid sulfur flows into the heat-insulating forming pool slowly through the through holes, and then drops into the granulating host through a forming hole at the bottom of the heat-insulating forming pool to form particles quickly, and the production efficiency is high;
according to the invention, the waste gas collecting cover for the liquid sulfur volatile waste gas is arranged above the anti-splashing distribution device, and the waste gas collecting cover is communicated with the waste gas water washing and spraying device. According to the invention, the steam-water separation plate is arranged in the waste gas washing and spraying device, so that the waste gas volatilized by the liquid sulfur is rapidly cooled into solid sulfur powder by spraying water and is discharged into the circulating water feeding tank through the bottom circulating water pipe, and the sulfur steam volatilized by the liquid sulfur is prevented from being sucked into the exhaust fan to be solidified. The purified gas is exhausted to the atmosphere through an exhaust fan, so that the cleaning of the operating environment is realized.
In addition, the standby drying and dehydrating device is arranged below the granulation main machine, when one drying and dehydrating device has a problem, the standby drying and dehydrating device can be directly started, the equipment cannot be stopped, the production efficiency is high, the yield is high, and the continuous production can be realized.
According to the invention, the blowing device for blowing hot air in the reverse direction to the solid sulfur particle discharging direction is arranged at the outlet of the solid sulfur finished product, so that the drying and dehydrating speed of the solid sulfur is accelerated, the sulfur powder and sulfur steam are prevented from being discharged along with the solid sulfur particles, and the workshop environment is protected. The air knife which reciprocates along the horizontal direction is arranged above the vibrating dewatering screen and is used for cutting the sulfur dust blocking the draining holes on the vibrating dewatering screen, so that the sulfur dust falls into the dewatering pool, and the continuous operation of the vibrating dewatering screen is ensured. In addition, the outside of the drying and dehydrating device adopts a closed sealing cover, so that the sulfur dust is prevented from flying, and the workshop environment is not influenced.
Drawings
FIG. 1 is a schematic view of the configuration of an underwater sulfur granulation system and an exhaust gas treatment system according to the present invention;
FIG. 2 is a schematic bottom view of the splash guard of the present invention;
FIG. 3 is a schematic view of the bottom plate structure of the thermal insulation molding pool of the present invention;
FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3 in accordance with the present invention;
FIG. 5 is an enlarged view taken at I of FIG. 4 in accordance with the present invention;
fig. 6 is a schematic view of the internal structure of the drying and dehydrating apparatus of the present invention.
Wherein, 1 is a granulation host, 1-1 is an overflow groove, 1-2 is a water inlet, 1-3 is a discharge hole, and 1-4 is a bracket; 2 is an anti-splashing distribution device, and 2-1 is a through hole; 3 is a heat preservation forming pool, 3-1 is a forming hole, and 3-2 is a boss; 4 is a liquid sulfur inlet pipeline; 5 is a waste gas collecting cover; 6 is a waste gas water washing spray device, and 6-1 is a steam-water isolation plate; 7 is a drying dehydration device, 7-1 is a sealing cover, 7-2 is a vibration dehydration screen, 7-3 is an air knife, 7-4 is a reciprocating motor, 7-5 is an air compressor, 7-6 is a dehydration pool, and 7-7 is a blowing device; 8 is a water-solid separation device, 8-1 is a feeding tank, 8-2 is a concentration tank, 8-3 is a sedimentation tank, 8-4 is a clear water tank, 8-5 is a feeding pump, and 8-6 is a cyclone for solid-liquid separation; 9 is a fine powder sulfur screw conveyor; 10 is a sulfur melting device, 10-1 is a sulfur melting tank, 10-2 is a partition plate, and 10-3 is a liquid sulfur pump; 11 is a circulating water return device, 11-1 is a circulating water pump, and 11-2 is circulating water heat exchange equipment; 12 is a discharge pipe; 13 is a self-control valve; 14 is an exhaust fan; 15 is a solid sulfur finished product outlet; and 16 is a melting pipe.
Detailed Description
The present invention will now be described in further detail with reference to the attached drawings, which are illustrative, but not limiting, of the present invention.
Referring to fig. 1, an underwater sulfur granulation and waste gas treatment system comprises a granulation host 1, and a heat-preservation forming pool 3, a liquid sulfur inlet pipeline 4, an anti-splashing distribution device 2, a waste gas collection cover 5 and a waste gas spraying and washing device 6 which are arranged above the granulation host 1; a drying and dehydrating device 7, a water-solid separation device 8, a fine powder sulfur screw conveyor 9, a sulfur melting device 10 and a circulating water return device 11 are arranged below the granulation main machine 1.
Specifically, the underwater sulfur granulation and waste gas treatment system comprises a granulation host machine 1, a heat-preservation forming pool 3 communicated with an anti-splashing distribution device 2 is arranged above the granulation host machine 1, and the inlet end of the anti-splashing distribution device 2 is communicated with a liquid sulfur inlet pipeline 4; a waste gas collecting cover 5 for collecting liquid sulfur volatile waste gas is arranged above the heat-preservation forming pool 3, and an outlet of the waste gas collecting cover 5 is communicated with an inlet of a waste gas washing and spraying device 6; a steam-water separation plate 6-11 is longitudinally arranged in the waste gas washing spray device 6, the gas outlet of the waste gas washing spray device 6 is communicated with an exhaust fan 14, and the liquid outlet of the waste gas washing spray device 6 is communicated with a feeding pool 8-1 in the water-solid separation device 8.
Furthermore, overflow grooves 1-1 are arranged on two sides of the main granulation machine 1, and the outlet ends of the overflow grooves 1-1 are communicated with dewatering tanks 7-6 in a drying and dewatering device 7; the bottom of the granulation main machine 1 is provided with a plurality of water inlets 1-2 and discharge ports 1-3; each water inlet 1-2 is communicated with a circulating water return device 11; each discharge port 1-3 is connected with the drying and dehydrating device 7 through a discharge pipe 12, and an automatic control valve 13 is arranged between the discharge pipe 12 and the discharge port 1-3.
Further, the bottom plate of the heat-preservation forming pool 3 is an arc-shaped plate protruding downwards, and a plurality of forming holes 3-1 for liquid sulfur to drip are formed in the bottom plate of the heat-preservation forming pool 3; a waste gas collecting cover 5 is arranged above the heat-insulating forming pool 3, and the heat-insulating forming pool 3 is fixed on the supports 1-4 beside the granulation main machine 1. The structural schematic diagram of the bottom plate of the heat-preservation forming pool 3 is shown in figure 3, and figures 4 and 5 are structural schematic diagrams of forming holes 3-1 on the bottom plate of the heat-preservation forming pool 3; the bottom of the heat-preservation forming pool 3 is provided with a plurality of forming holes 3-1 for liquid sulfur to drip, the number of the forming holes 3-1 at the bottom of the heat-preservation forming pool 3 is thousands, and a boss 3-2 is arranged at the joint of the forming holes 3-1 and the bottom plate of the heat-preservation forming pool 3 to prevent the liquid sulfur from flowing and adhering. The vertical distance between the center of the bottom plate of the heat-preservation forming pool 3 and the liquid level of the granulation main machine 1 is 20-50 mm.
Further, the anti-splashing distribution device 2 is fixedly connected with the liquid sulfur inlet pipeline 4; the bottom of the anti-splashing distribution device 2 is provided with four through holes 2-1 which are symmetrical in pairs, and the axes of the through holes 2-1 are symmetrically distributed at two sides of the liquid sulfur inlet pipeline 4. Referring to fig. 2, a bottom structure of the splash proof distribution device of the present invention is schematically shown. The through holes 2-1 arranged at the bottom of the anti-splashing distribution device 2 are symmetrically distributed at two sides of the central axis of the longitudinal liquid sulfur inlet pipeline 4, so that the hydraulic pressure of sulfur which quickly flows out of the liquid sulfur inlet pipeline 4 is buffered, the outflow pressure of the liquid sulfur is reduced, and the liquid sulfur smoothly flows into the heat-preservation forming pool 3 through the through holes 2-1.
Further, the waste gas collecting cover 5 is used for collecting the volatile waste gas of liquid sulfur, and the outlet of the waste gas collecting cover 5 is communicated with the inlet of the waste gas water washing spraying device 6.
Further, a steam-water separation plate 6-1 is longitudinally arranged in the waste gas washing and spraying device 6, an air outlet of the waste gas washing and spraying device 6 is communicated with an exhaust fan 14, and a liquid outlet of the waste gas washing and spraying device 6 is communicated with a feeding pool 8-1 in the water-solid separation device 8. Specifically, the distance between a steam-water separation plate 6-1 longitudinally arranged in the waste gas washing spray device 6 and the liquid level at the bottom of the waste gas washing spray device 6 is 8-15 cm.
Further, the drying and dewatering device 7 comprises a vibration dewatering screen 7-2 arranged in the sealing cover 7-1, an air knife 7-3 arranged above the vibration dewatering screen 7-2, a reciprocating motor 7-4, an air compressor 7-5, an air blowing device 7-7, a solid sulfur finished product outlet 15 and a dewatering pool 7-6 arranged below the vibration dewatering screen 7-1, wherein the air knife 7-3 comprises a hard circular tube with an air outlet formed at the bottom;
the inlet of each drying and dehydrating device 7 is connected with the discharge port 1-3 of the granulation main machine 1 through a discharge pipe 12, and the drying and dehydrating devices 7 are controlled to be in an opening or standby state by controlling the starting and stopping of an automatic control valve 13; the air knife 7-3 positioned above the vibrating dewatering screen 7-2 is respectively connected with a reciprocating motor 7-4 and an air compressor 7-5, and the reciprocating motor 7-4 drives the air knife 7-3 to reciprocate on a slide rail of the sealing cover 7-1; the outlet end of a dewatering pool 7-6 below the vibrating dewatering screen 7-2 is communicated with a feeding pool 8-1 in the water-solid separation device 8, and the solid outlet end of the drying dewatering device 7 is communicated with a solid sulfur finished product outlet 15; a blowing device 7-7 for blowing hot air in the opposite direction to the solid sulfur particle discharging direction is arranged at the solid sulfur finished product outlet 15.
Further, the water-solid separation device 8 comprises a feeding tank 8-1, a concentration tank 8-2, a feeding pump 8-5, a solid-liquid separation cyclone 8-6, a sedimentation tank 8-3 and a clean water tank 8-4;
the outlet end of the dehydration tank 7-6 is communicated with the feeding tank 8-1, and the outlet of the feeding tank 8-1 is communicated with the inlet of a solid-liquid separation cyclone 8-6 through a feeding pump 8-5; a bottom flow port of the solid-liquid separation cyclone 8-6 is communicated with the concentration tank 8-2, and an overflow port of the solid-liquid separation cyclone 8-6 is communicated with a sedimentation tank 8-3 arranged beside the concentration tank 8-2; clear water on the upper layer of the sedimentation tank 8-3 is introduced into a clear water tank 8-4 through an overflow partition plate; the clean water tank 8-4 is communicated with the circulating water return device 11 through a circulating water pump 11-1, and the clean water tank 8-4 is communicated with the inlet end of the waste gas water washing spray device 6.
Further, the fine powder sulfur screw conveyor 9 is obliquely arranged on the concentration tank 8-1; the lower end of the fine powder sulfur screw conveyor 9 is positioned at the bottom of the concentration tank 8-1, and the upper end is communicated with the sulfur melting device 10 and is used for conveying the sulfur powder precipitated at the bottom of the concentration tank 8-1 to the sulfur melting device 10.
Further, the sulfur melting device 10 comprises a sulfur melting tank 10-1, a partition plate 10-2 and a liquid sulfur pump 10-3, wherein the partition plate 10-2 is arranged in the sulfur melting tank 10-1, a melting medium in the sulfur melting tank 10-1 flows into the anti-splashing distribution device 2 through a melting pipeline 16, and the liquid sulfur in the sulfur melting tank is connected with an inlet of the anti-splashing distribution device 2 through the liquid sulfur pump 10-3.
Further, the circulating water returning device 11 comprises a circulating water pump 11-1 and circulating water heat exchange equipment 11-2, clear water in a clear water tank 8-4 enters the circulating water heat exchange equipment 11-2 through the circulating water pump 11-1, the clear water enters the granulation host 1 after heat exchange, and the water inlet flow of the clear water is adjusted according to the amount of the liquid sulfur entering the granulation host 1.
In particular, the sulfur underwater granulation system and the waste gas treatment system are suitable for underwater granulation of liquid sulfur and other solid particles, such as underwater granulation of pitch such as resin, asphalt and the like. The working principle of the invention is as follows: after liquid sulfur is filtered by a sulfur filter, the liquid sulfur firstly reduces the hydraulic pressure of the liquid sulfur by an anti-splashing distribution device 2, so that the liquid sulfur smoothly flows into a heat-preservation forming pool 3, the liquid sulfur is divided into a plurality of liquid flow beams by the heat-preservation forming pool 3, then the liquid flow beams enter a granulation main machine 1, in the granulation main machine 1, the liquid sulfur flow beams are cooled by cooling water under the combined action of gravity and surface tension to form spherical small particles, the small particles are discharged from a discharge port 1-3 at the bottom of the granulation main machine 1 and are dried and dehydrated by a drying and dehydrating device 7, and the dehydrated and dried solid sulfur particles are conveyed to a sulfur packaging workshop or a finished product warehouse through a solid sulfur finished product outlet 15. Circulating water containing sulfur powder enters a water-solid separation device 8 for water-solid separation and recycling; the waste gas volatilized by the liquid sulfur enters a waste gas washing and spraying device 6 for washing and purifying, the gas is discharged through an exhaust fan 14 after being purified, and the sulfur-containing powder circulating water after being washed and purified enters a water-solid separation device 8 for water-solid separation and recycling.
Specifically, a self-control valve 13 is arranged at a position, close to the discharge port 1-3, of a discharge pipe 12 below the main granulation machine 1, the discharge pipe is obliquely arranged, and an included angle between the discharge pipe and a horizontal axis is 30-45 degrees. One or more drying and dehydrating devices 7 are controlled to be used by opening and closing the automatic control valve 13, when one drying and dehydrating device 7 needs to be maintained, the standby drying and dehydrating device 7 can be adopted for drying and dehydrating, the shutdown of workshop equipment is avoided, and the continuous production is realized.
It should be noted that the bottom of the main granulating machine is provided with a plurality of water inlets 1-2 which are symmetrical pairwise, so that the water flow speed in the main granulating machine is ensured; each water inlet 1-2 is connected with a circulating water return device 11 through a pipeline; circulating water in the main granulation machine 1 keeps a flowing state under the action of the circulating water pump 11-1, liquid sulfur quickly drops into water flow in the main granulation machine through the heat-preservation forming pool 3, the dropped sulfur liquid drops are quickly cut, dispersed and cooled and solidified into particles under the action of the water flow, the particle sulfur quickly sinks under the gravity and is discharged from the discharge hole 14, the particles are dehydrated into dry solid sulfur particles through the drying and dehydrating device 13, and the particle diameter of the dehydrated and dried solid sulfur is 2-6 mm. According to the underwater sulfur granulating system and the waste gas treatment system, the flowing circulating water can quickly disperse and cool the sulfur, and the gravity of the sulfur can quickly make the sulfur particles sink to the discharge port 1-3 of the main granulating machine and be discharged together with water, so that the whole process can be continuously operated, continuous production is kept, and the production efficiency is improved.
Specifically, four water inlets 1-2 which are symmetrical in pairs are arranged at the bottom of the main granulation machine 1, and each water inlet 1-2 is communicated with the circulating water return device 11. Four water inlets 1-2 which are symmetrical in pairs are formed at the bottom of a main granulating machine 1, so that the water flow speed in the main granulating machine 1 is ensured; each water inlet 1-2 is connected with a circulating water return device 11 through a pipeline, circulating water in the granulation main machine 1 keeps a flowing state under the action of a circulating water pump 11-1, liquid sulfur quickly drops into water flow in the granulation main machine 1 through a heat-preservation forming pool 3, and the dropped sulfur drops are quickly cut, dispersed, cooled and solidified into granules under the action of the water flow.
Referring to fig. 6, there is shown a schematic view of the internal structure of the drying and dewatering device 7 of the present invention. The inlet of each drying and dehydrating device 7 is connected with the discharge port 1-3 in the main granulation machine 1 through a discharge pipe 12, and the drying and dehydrating devices 7 are controlled to be in an opening or standby state by controlling the starting and stopping of an automatic control valve 13; the air knife 7-5 positioned above the vibration dewatering screen 7-2 comprises a hard circular tube with an air outlet at the bottom, in order to increase the air outlet pressure, a thin seam is arranged at the bottom of the hard circular tube in the horizontal direction to be used as the air outlet, the air inlet of the hard circular tube is connected with the air compressor 7-5, and the air compressor 7-55 provides compressed air for the air compressor; an output shaft of the reciprocating motor 7-4 is connected to the center of the hard circular tube of the air knife 7-3, and the output shaft of the reciprocating motor 7-4 is perpendicular to the central axis of the air knife 7-3. The air knife 7-3 reciprocates above the vibrating dewatering screen 7-2 along the horizontal direction along the slide rail in the sealing cover 7-1 of the drying dewatering device 7 under the action of the reciprocating motor 7-4, and cuts the sulfur dust in the draining holes on the vibrating dewatering screen 7-2 through air with certain pressure, so that the sulfur dust blocked in the draining holes falls into the dewatering tank 7-6, the vibrating dewatering screen 7-2 is protected, and continuous production is also ensured. The outlet end of a dewatering pool 7-6 below the vibrating dewatering screen 7-2 is communicated with a feeding pool 8-1 in the water-solid separation device 8, and the solid outlet end of the drying dewatering device 7 is communicated with a solid sulfur finished product outlet 15; a blowing device 7-7 for blowing hot air in the opposite direction to the solid sulfur particle discharging direction is arranged at the solid sulfur finished product outlet 15.
According to the technical scheme, the invention provides an underwater sulfur granulating system and an exhaust gas treatment system, which comprise a granulating main machine and a heat-preservation forming pool 3 arranged above the granulating main machine, wherein an anti-splashing distribution device 2 is arranged above the heat-preservation forming pool 3, a plurality of through holes 2-1 for liquid sulfur to flow out are formed in the bottom of the anti-splashing distribution device 2, so that the hydraulic pressure of the sulfur flowing out quickly from a liquid sulfur inlet pipeline 4 is buffered, the outflow pressure of the liquid sulfur is reduced, the liquid sulfur flows into the heat-preservation forming pool 3 slowly through the through holes 2-6, and then drops into the granulating main machine through forming holes 3-1 in the bottom of the heat-preservation forming pool 3 to form granules quickly, and the production efficiency is high.
The waste gas collecting cover 5 of the waste gas volatilized by the liquid sulfur is arranged above the anti-splashing distribution device 2, and the waste gas collecting cover 5 is communicated with the waste gas washing and spraying device 6. According to the invention, the steam-water separation plate 6-1 is arranged in the waste gas water washing spray device 6, so that the sulfur steam volatilized by liquid sulfur is quenched by sprayed water, and the sulfur steam volatilized by the liquid sulfur is prevented from being sucked into the exhaust fan 14. The waste gas water washing spray device 6 quenches sulfur steam into sulfur powder through spray water washing, the sulfur powder is discharged to a feeding tank 8-1 in the water-solid separation device 8 through a circulating water outlet pipe, and the purified gas is discharged through an exhaust fan 14.
In addition, the standby drying and dehydrating device 7 is arranged below the granulation main machine 1, when one drying and dehydrating device 7 has a problem, the standby drying and dehydrating device 7 can be directly started, the equipment cannot be stopped, the production efficiency is high, the yield is high, and the continuous production can be realized. The invention is provided with the blowing device 7-7 for blowing hot air in the reverse direction to the discharge direction of the solid sulfur particles at the outlet of the solid sulfur finished product, thereby accelerating the drying and dehydrating speed of the solid sulfur, preventing the sulfur powder and sulfur steam from being discharged along with the solid sulfur particles and protecting the workshop environment. The air knife 7-3 reciprocating along the horizontal direction is arranged above the vibrating dewatering screen and used for cutting sulfur dust blocking the draining holes on the vibrating dewatering screen 7-2 to enable the sulfur dust to fall into the dewatering pool 7-6, so that the continuous operation of the vibrating dewatering screen 7-2 is ensured. In addition, a closed sealing cover 7-1 is adopted outside the drying and dehydrating device 7, so that no sulfur dust and no odor gas exist, and the operating environment is clean.
The embodiments given above are preferable examples for implementing the present invention, and the present invention is not limited to the above-described embodiments. Any non-essential addition and replacement made by the technical characteristics of the technical scheme of the invention by a person skilled in the art belong to the protection scope of the invention.
Claims (10)
1. An underwater sulfur granulation system and a waste gas treatment system are characterized by comprising a granulation host (1), and a heat-preservation forming pool (3), a liquid sulfur inlet pipeline (4), a splash-proof distribution device (2), a waste gas collecting cover (5) and a waste gas spraying and washing device (6) which are arranged above the granulation host (1); a drying and dehydrating device (7), a water-solid separating device (8), a fine powder sulfur screw conveyor (9), a sulfur melting device (10) and a circulating water returning device (11) are arranged below the granulation main machine (1).
2. The underwater sulfur granulation system and the waste gas treatment system according to claim 1, wherein overflow chutes (1-1) are arranged on both sides of the main granulation machine (1), and the outlet ends of the overflow chutes (1-1) are communicated with dewatering tanks (7-6) in a drying and dewatering device (7); the bottom of the granulation main machine (1) is provided with a plurality of water inlets (1-2) and discharge ports (1-3); each water inlet (1-2) is communicated with a circulating water return device (11); each discharge port (1-3) is connected with a drying and dehydrating device (7) through a discharge pipe (12), and an automatic control valve (13) is arranged between the discharge pipe (12) and the discharge ports (1-3).
3. The underwater sulfur granulation system and the waste gas treatment system according to claim 1, wherein the bottom plate of the heat-preservation forming pool (3) is an arc-shaped plate protruding downwards, and a plurality of forming holes (3-1) for dropping liquid sulfur are formed in the bottom plate of the heat-preservation forming pool (3); an exhaust gas collecting cover (5) is arranged above the heat-insulating forming pool (3), and the heat-insulating forming pool (3) is fixed on a bracket (1-4) beside the granulation main machine (1).
4. The underwater sulfur granulation system and the waste gas treatment system as claimed in claim 1, wherein the anti-splashing distribution device (2) is fixedly connected with the liquid sulfur inlet pipeline (4); the bottom of the anti-splashing distribution device (2) is provided with four through holes (2-1) which are symmetrical in pairs, and the central axes of the through holes (2-1) are symmetrically distributed on two sides of the liquid sulfur inlet pipeline (4).
5. The underwater granulation system and the waste gas treatment system for sulfur according to claim 1, wherein the waste gas collecting cover (5) is used for collecting the waste gas generated by volatilization of liquid sulfur, and the outlet of the waste gas collecting cover (5) is communicated with the inlet of the waste gas water washing and spraying device (6).
6. The underwater sulfur granulation system and the waste gas treatment system according to claim 5, wherein a steam-water isolation plate (6-1) is longitudinally arranged in the waste gas washing spray device (6), the gas outlet of the waste gas washing spray device (6) is communicated with the exhaust fan (14), and the liquid outlet of the waste gas washing spray device (6) is communicated with the feeding pool (8-1) in the water-solid separation device (8).
7. The underwater sulfur granulation system and the waste gas treatment system according to claim 1, wherein the drying and dehydrating device (7) comprises a vibration dehydrating screen (7-2) arranged in a sealing cover (7-1), an air knife (7-3) above the vibration dehydrating screen (7-2), a reciprocating motor (7-4), an air compressor (7-5), an air blowing device (7-7), a solid sulfur product outlet (15) and a dehydrating tank (7-6) below the vibration dehydrating screen (7-2), and the air knife (7-3) comprises a hard circular tube with an air outlet at the bottom;
the inlet of each drying and dehydrating device (7) is connected with a discharge hole (1-3) in the granulation main machine (1) through a discharge pipe (12), and the drying and dehydrating devices (7) are controlled to be in an opening or standby state by controlling the starting and stopping of an automatic control valve (13); an air knife (7-3) positioned above the vibrating dewatering screen (7-2) is respectively connected with a reciprocating motor (7-4) and an air compressor (7-5), and the reciprocating motor (7-4) drives the air knife (7-3) to reciprocate on a slide rail of the sealing cover (7-1); the outlet end of a dewatering pool (7-6) below the vibrating dewatering screen (7-2) is communicated with a feeding pool (8-1) in the water-solid separation device (8), and the solid outlet end of the drying dewatering device (7) is communicated with a solid sulfur finished product outlet (15); a blowing device (7-7) for blowing hot air in the opposite direction of the solid sulfur particle discharging direction is arranged at the solid sulfur finished product outlet (15).
8. The underwater sulfur granulation system and the waste gas treatment system as claimed in claim 7, wherein the water-solid separation device (8) comprises a feeding tank (8-1), a concentration tank (8-2), a feeding pump (8-5), a solid-liquid separation cyclone (8-6), a sedimentation tank (8-3) and a clean water tank (8-4);
the outlet end of the dewatering tank (7-6) is communicated with the feeding tank (8-1), and the outlet of the feeding tank (8-1) is communicated with the inlet of a solid-liquid separation cyclone (8-6) through a feeding pump (8-5); the underflow port of the solid-liquid separation cyclone (8-6) is communicated with the concentration tank (8-2), and the overflow port of the solid-liquid separation cyclone (8-6) is communicated with the sedimentation tank (8-3) arranged beside the concentration tank (8-2); clear water on the upper layer of the sedimentation tank (8-3) is introduced into a clear water tank (8-4) through an overflow partition plate; the clean water tank (8-4) is communicated with the circulating water return device (11) through a circulating water pump (11-1), and the clean water tank (8-4) is communicated with the inlet end of the waste gas washing spray device (6).
9. The underwater sulfur granulation system and the waste gas treatment system as claimed in claim 8, wherein the fine sulfur screw conveyor (9) is obliquely arranged on the concentration tank (8-1); the lower end of the fine powder sulfur screw conveyor (9) is positioned at the bottom of the concentration tank (8-1), and the upper end is communicated with the sulfur melting device (10) and is used for conveying the sulfur powder precipitated at the bottom of the concentration tank (8-1) to the sulfur melting device (10).
10. The underwater sulfur pelletizing system and the waste gas treatment system according to claim 4, characterized in that the sulfur melting device (10) comprises a sulfur melting tank (10-1), a liquid sulfur pump (10-3) and a partition plate (10-2) in the sulfur melting tank (10-1), the melting medium in the sulfur melting tank (10-1) flows from the anti-splash distribution device (2) through a melting pipeline (16), and the liquid sulfur in the sulfur melting tank is connected with the inlet of the anti-splash distribution device (2) through the liquid sulfur pump (10-3).
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| CN202010700304.4A CN111704111A (en) | 2020-07-20 | 2020-07-20 | Sulphur granulation and exhaust-gas treatment system under water |
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| CN202010700304.4A CN111704111A (en) | 2020-07-20 | 2020-07-20 | Sulphur granulation and exhaust-gas treatment system under water |
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Cited By (1)
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| CN116409756A (en) * | 2023-02-15 | 2023-07-11 | 广州赫尔普化工有限公司 | Water washing purification method for sulfur steam |
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