CN115090660A - Tower-type solar high-temperature melting industrial waste salt resource utilization system - Google Patents
Tower-type solar high-temperature melting industrial waste salt resource utilization system Download PDFInfo
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- CN115090660A CN115090660A CN202210741092.3A CN202210741092A CN115090660A CN 115090660 A CN115090660 A CN 115090660A CN 202210741092 A CN202210741092 A CN 202210741092A CN 115090660 A CN115090660 A CN 115090660A
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- 150000003839 salts Chemical class 0.000 title claims abstract description 186
- 238000002844 melting Methods 0.000 title claims abstract description 44
- 230000008018 melting Effects 0.000 title claims abstract description 44
- 239000002440 industrial waste Substances 0.000 title claims abstract description 38
- 239000002699 waste material Substances 0.000 claims abstract description 52
- 239000002918 waste heat Substances 0.000 claims abstract description 42
- 238000011084 recovery Methods 0.000 claims abstract description 37
- 238000003860 storage Methods 0.000 claims description 21
- 239000002245 particle Substances 0.000 claims description 17
- 239000000523 sample Substances 0.000 claims description 13
- 239000011521 glass Substances 0.000 claims description 6
- 239000008187 granular material Substances 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 239000006260 foam Substances 0.000 claims description 3
- 239000012774 insulation material Substances 0.000 claims description 3
- 230000005855 radiation Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 25
- 238000000034 method Methods 0.000 abstract description 20
- 238000004064 recycling Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 7
- 238000010791 quenching Methods 0.000 abstract description 7
- 238000005469 granulation Methods 0.000 abstract description 6
- 230000000171 quenching effect Effects 0.000 abstract description 6
- 230000003179 granulation Effects 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 239000002826 coolant Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000002920 hazardous waste Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000000543 intermediate Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
A tower-type solar high-temperature melting industrial waste salt resource utilization system belongs to the technical field of industrial waste salt treatment and solar photo-thermal, and comprises a heat collecting system, a waste salt melting disposal system and a molten salt waste heat recovery system; the heat gathering system comprises a heliostat group and a heat gathering system controller; the heliostat group is arranged around the waste salt melting disposal system and consists of a plurality of upright heliostats, the heliostat group is controlled by the heat collecting system controller to reflect sunlight towards the same target and collect the sunlight into a tower type heat collector arranged at the top of the elevated frame, and the bottom of the waste salt melting disposal system is connected with a molten salt waste heat recovery system. On the basis of the original industrial waste salt recycling process, the centrifugal granulation method is adopted to solve the problems of water resource waste and heat loss in the traditional water quenching method; after centrifugal granulation, waste heat recovery is carried out, so that the residual heat is fully utilized, the energy consumption of the system is reduced, and the energy utilization rate is improved.
Description
Technical Field
The invention belongs to the technical field of industrial waste salt treatment and solar photo-thermal, and particularly relates to a tower type solar high-temperature melting industrial waste salt resource utilization system.
Background
With the rapid development of industrial systems, a large amount of industrial waste salt is generated by the rapid development of industrial production processes such as pesticide intermediates, drug synthesis, printing and dyeing and the like, solid-liquid separation, solution concentration and crystallization, sewage treatment and the like. The annual output of waste salt in China at the present stage exceeds 2.0 multiplied by 10 7 Meanwhile, in 2021, the national records of hazardous wastes officially list wastes such as distillation and reaction residues, waste mother liquor, reaction tank and container cleaning waste liquor in various production processes in the records of hazardous wastes.
The method mainly adopted for recycling the waste salt at present is a waste salt high-temperature melting treatment technology of a rotary kiln, the process enables industrial waste salt to be completely converted into a molten state in a furnace through the reaction temperature of 800-1200 ℃, the volume of the waste salt is rapidly and greatly reduced, main impurity organic components in the waste salt can be completely decomposed and converted into waste gas at the high temperature and removed, the molten salt is quenched by a water quenching method to form saturated salt water, crystal salt is separated out through distillation operation, and the recycling of the waste salt is completed.
The resource of the prior industrial waste salt resource utilization is mainly fossil fuel. The heating mode of ignition combustion is adopted, so that the cost is high, non-renewable energy is consumed, the combustion efficiency is less than 70%, and secondary pollution can be caused by pollutants generated in the treatment process. When high-temperature molten salt is treated, the water quenching method is adopted to quench the high-temperature molten salt, so that the problems of incomplete molten salt agglomeration caused by incineration, blockage of a molten salt nozzle and the like can be caused in the contact process of water and the high-temperature molten salt. Meanwhile, under the action of quenching, not only is the heat stored in the high-temperature molten salt lost and not utilized, but also the system energy efficiency is low, and the waste of water resources is also caused.
Disclosure of Invention
The invention aims to provide a tower-type solar high-temperature melting industrial waste salt resource utilization system, which adopts clean renewable energy to melt and treat waste salt, reduces the combustion of non-renewable fuel and reduces the carbon emission; the molten waste salt is centrifugally granulated and subjected to waste heat recovery treatment, so that the problems of molten salt adhesion and agglomeration, water resource waste, high-temperature sensible heat waste and the like caused by the treatment of the molten waste salt by the traditional water quenching method are solved.
In order to achieve the purpose, the invention adopts the following technical scheme:
a tower-type solar high-temperature melting industrial waste salt resource utilization system comprises a heat collecting system, a waste salt melting disposal system and a molten salt waste heat recovery system;
the heat gathering system comprises a heliostat group and a heat gathering system controller; the heliostat group is arranged around the waste salt melting disposal system and consists of a plurality of upright heliostats, the heliostat group is controlled by the heat collecting system controller to reflect sunlight towards the same target and collect the sunlight into a tower type heat collector arranged at the top of the elevated frame, and the bottom of the waste salt melting disposal system is connected with a molten salt waste heat recovery system.
The heliostat groups gather sunlight to the tower type heat collector according to radiation grid layout, non-blocking layout, empirical layout or non-shielding layout arrangement.
The reflecting surface of the vertical column type heliostat is rectangular, triangular, circular or polygonal, and the length-width ratio and the angle of the mirror surface can be adjusted according to the scale of a mirror field or the longitude and latitude of a region where the heliostat is located during specific use.
The column heliostat is made of composite materials integrated by glass foam and glass sandwich with spherical curvature.
The waste salt melting treatment system comprises a molten salt heat exchange device arranged inside a tower-type heat collector, wherein an inlet at the top of the molten salt heat exchange device is connected with an outlet of an industrial waste salt storage tank through a waste salt feeding device, an outlet at the bottom of the molten salt heat exchange device is connected with an inlet of a high-temperature molten salt storage tank through a molten salt conveying pipeline, an outlet of the high-temperature molten salt storage tank is connected with a molten salt nozzle of a centrifugal granulating device through a pipeline, and a salt particle collecting device of the centrifugal granulating device is connected with a molten salt waste heat recovery system.
The industrial waste salt storage tank and the high-temperature molten salt storage tank are consistent in structure and respectively comprise a tank body, a temperature probe, a pressure probe and a flow probe are respectively arranged in the tank body, and the output ends of the industrial waste salt storage tank and the high-temperature molten salt storage tank are respectively connected with the waste salt exchange control system through cables; the tank body is made of heat insulation materials.
The centrifugal granulating device can adopt a rotating cup type granulator, a roller type granulator and a rotating disk type granulator.
The molten salt waste heat recovery system comprises a waste heat recovery device and a salt granule conveying belt, wherein an inlet of the waste heat recovery device is connected with an outlet of the salt granule collecting device of the centrifugal granulating device through a pipeline, and an outlet of the waste heat recovery device is opposite to the salt granule conveying belt.
Compared with the prior art, the invention has the beneficial effects that:
the invention combines the innovativeness of the high-temperature melting method and the solar heat collecting tower, not only exerts the advantages of high impurity removal efficiency and strong universality of the high-temperature melting method, but also utilizes renewable clean solar energy to solve the defects of high energy consumption and high carbon emission of the method, and conforms to the concept of energy conservation and emission reduction.
On the basis of the original industrial waste salt recycling process, the centrifugal granulation method is adopted to solve the problems of water resource waste and heat loss in the traditional water quenching method; after centrifugal granulation, waste heat recovery is carried out, so that the residual heat is fully utilized, the energy consumption of the system is reduced, and the energy utilization rate is improved.
The method changes the industrial waste salt brought into 2021 edition national hazardous waste record into valuable, saves energy and reduces emission while developing new energy technology, improves the economic benefit of related companies, reduces the damage of the industrial waste salt to the natural environment and the atmospheric environment, and has good application prospect.
Drawings
FIG. 1 is a tower-type solar high-temperature melting industrial waste salt resource utilization system;
the method comprises the following steps of 1-heliostat group, 2-fused salt heat exchange device top inlet, 3-fused salt heat exchange device, 4-fused salt heat exchange device bottom outlet, 5-overhead, 6-industrial waste salt storage tank, 7-high temperature fused salt storage tank, 8-waste salt feeding device, 9-fused salt nozzle, 10-granulation bin, 11-centrifugal turntable, 12-salt particle collecting device, 13-heat exchange water pipe, 14-water vapor output end, 15-cold water input end, 16-salt particle conveying belt, 17-tower type heat collector, 18-centrifugal granulation device and 19-waste heat recovery device.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples.
As shown in fig. 1, a tower-type solar high-temperature melting industrial waste salt resource utilization system comprises a heat collecting system, a waste salt melting disposal system and a molten salt waste heat recovery system;
the heat concentration system comprises a heliostat group 1 and a heat concentration system controller; the heliostat group 1 is arranged around the waste salt melting disposal system, the heliostat group 1 is composed of a plurality of upright heliostats, the heliostat group 1 is controlled by a heat-gathering system controller to reflect sunlight towards the same target and gather the sunlight into a tower-type heat collector 17 arranged at the top of the elevated frame 5, and the bottom of the waste salt melting disposal system is connected with a molten salt waste heat recovery system.
The heliostat group 1 concentrates sunlight to the tower heat collector 17 according to a radiation grid layout, a non-blocking layout, an empirical layout or a non-shielding layout arrangement, and obtains the maximum sunlight absorption efficiency according to different geographical environments and sunlight conditions.
The column heliostat is provided with a light sensing module and a positioning module, and the light sensing module can feed back to the heat concentration system controller according to the sunlight irradiation angle and the intensity to adjust the mirror surface angle to achieve the optimal reflection angle; the positioning module can acquire longitude and latitude information, conditions and time information of the heliostat group 1, wherein the light sensing module is a light sensor, and the positioning module is a GPS positioning module; the polished rod module and the positioning module transmit monitored information to the heat collecting system controller, and the heat collecting system controller sends an instruction to the driving device of the vertical column type heliostat, so that the two-dimensional rotation of the heliostat is adjusted, and the mirror surface angle reaches the optimal reflecting angle.
The reflecting surface of the vertical column type heliostat is rectangular, triangular, circular or polygonal, and the length-width ratio and the angle of the mirror surface can be adjusted according to the scale of a mirror field or the longitude and latitude of a region where the heliostat is located during specific use.
The column heliostat is made of composite materials integrated by glass foam and glass sandwich with spherical curvature.
The waste salt melting disposal system comprises a molten salt heat exchange device 3 arranged inside a tower type heat collector 17, an inlet 2 at the top of the molten salt heat exchange device is connected with an outlet of an industrial waste salt storage tank 6 through a waste salt feeding device 8, the waste salt feeding device 8 adopts an industrial solid conveyor belt, an outlet 4 at the bottom of the molten salt heat exchange device is connected with an inlet of a high-temperature molten salt storage tank 7 through a molten salt conveying pipeline, an outlet of the high-temperature molten salt storage tank 7 is connected with a molten salt nozzle 9 of a centrifugal granulating device 18 through a pipeline, the centrifugal granulating device 18 adopts a turntable type granulator, and a salt grain collecting device 12 of the centrifugal granulating device 18 is connected with a molten salt waste heat recovery system; industrial waste salt enters the molten salt heat exchange device through the top inlet of the molten salt heat exchange device to be subjected to high-temperature melting, then flows out through the bottom outlet of the molten salt heat exchange device, the high-temperature molten salt enters the molten salt nozzle 9 of the centrifugal granulating device 18, liquid molten salt is sprayed out through the molten salt nozzle 9 at a fixed speed to enter the granulating bin 10 of the centrifugal granulating device 18 and then falls to the centrifugal turntable 11, the centrifugal turntable 11 rotates at a high speed, the molten salt is driven by centrifugal force to fly away from the centrifugal turntable 11 in the rotating process, is condensed into high-temperature salt particles and collides with the granulating bin 10, falls into the salt particle collecting device 12, and is then conveyed into the molten salt waste heat recovery system; the tower type heat collector 17, the waste salt feeding device 8, the industrial waste salt storage tank 6, the high-temperature molten salt storage tank and the centrifugal granulating device 18 are all connected with a waste salt melting disposal system controller in the waste salt exchange control system through cables.
The industrial waste salt storage tank 6 and the high-temperature molten salt storage tank 7 are consistent in structure and respectively comprise a tank body, a temperature probe, a pressure probe and a flow probe are respectively arranged in the tank body, and the probes are respectively connected with a waste salt melting disposal system controller in the waste salt exchange control system through cables; the temperature, the pressure and the flow in the tank body are monitored through the temperature probe, the pressure probe and the flow probe, and are fed back to a waste salt melting disposal system controller of a waste salt exchange control system in real time, and the tank body is made of heat insulation materials.
The molten salt preheating and recycling system comprises a waste heat recycling device 19 and a salt grain conveying belt 16, wherein an inlet of the waste heat recycling device 19 is connected with an outlet of the salt grain collecting device 12 of the centrifugal granulating device 18 through a pipeline, and an outlet of the waste heat recycling device 19 is opposite to the salt grain conveying belt 16; the waste heat recovery device 19 adopts water or air cooling medium for indirect heat exchange, and the cooling medium flows through the staggered heat exchange water pipe 13 in the waste heat recovery device 19 under the action of the water pump; the high-temperature salt particles are gradually cooled through the heat exchange water pipe 13, waste heat is recovered, the cooled salt particles fall onto the salt particle transmission belt 16 through the outlet of the waste heat recovery device 19, and the waste heat recovery device 19, the water pump and the salt particle transmission belt are all connected with a molten salt waste heat recovery system controller in the waste salt exchange control system through cables.
The waste salt exchange control system is composed of a heat collection system controller, a waste salt melting disposal system controller, a molten salt waste heat recovery system controller, a control platform and a cloud server, wherein the cloud server is respectively connected with the heat collection system controller, the waste salt melting disposal system controller, the molten salt waste heat recovery system controller and the control platform through a wireless network, the heat collection system controller, the waste salt melting disposal system controller and the molten salt waste heat recovery system controller transmit collected information to the cloud server through the control platform, and an instruction is sent to the heat collection system controller, the waste salt melting disposal system controller and the molten salt waste heat recovery system controller through the control platform.
A once-through use process of a tower-type solar high-temperature melting industrial waste salt resource utilization system is as follows:
the heliostat group 1 is controlled by a heat collecting system controller to reflect sunlight to the same target and collect the sunlight into a tower type heat collector 17 arranged at the top of the elevated frame 5; industrial waste salt is transported from an industrial waste salt tank 6 to a molten salt heat exchange device in a tower type heat collector 17 through a waste salt feeding device 8, enters from an inlet at the top of the molten salt heat exchange device to be subjected to high-temperature melting, then flows out from an outlet at the bottom of the molten salt heat exchange device, the high-temperature molten salt enters a molten salt nozzle 9 of a centrifugal granulating device 18, liquid molten salt is sprayed out through the molten salt nozzle 9 at a fixed speed to enter a granulating bin 10 of the centrifugal granulating device 18 and then falls to the centrifugal turntable 11, the centrifugal turntable 11 rotates at a high speed, the molten salt is driven by centrifugal force to fly away from the centrifugal turntable 11 during rotation, the molten salt is condensed into high-temperature salt particles and collides with the granulating bin 10, the high-temperature salt particles fall into a salt particle collecting device 12 and are transported to a molten salt waste heat recovery system, a waste heat recovery device 19 adopts water cooling medium to perform indirect heat exchange, the cooling medium enters a heat exchange water pipe 13 which is distributed in a waste heat recovery device 19 in a staggered manner through a cold water input end 15, the cooling medium in the heat exchange water pipe 13 absorbs heat and then flows out from the water vapor output end 15 of the heat exchange water pipe 13; the high-temperature salt particles are gradually cooled under the action of the heat exchange water pipes 13 which are arranged in a staggered mode, then the waste heat in the high-temperature salt particles is recovered, and the cooled salt particles fall onto a salt particle conveying belt 16 through an outlet of a waste heat recovery device 19.
Claims (8)
1. A tower-type solar high-temperature melting industrial waste salt resource utilization system is characterized by comprising a heat collecting system, a waste salt melting disposal system and a molten salt waste heat recovery system;
the heat gathering system comprises a heliostat group and a heat gathering system controller; the heliostat group is arranged around the waste salt melting disposal system and consists of a plurality of upright heliostats, the heliostat group is controlled by the heat collecting system controller to reflect sunlight towards the same target and collect the sunlight into a tower type heat collector arranged at the top of the elevated frame, and the bottom of the waste salt melting disposal system is connected with a molten salt waste heat recovery system.
2. The tower-type solar high-temperature melting industrial waste salt resource utilization system according to claim 1, characterized in that: the heliostat groups gather sunlight to the tower type heat collector according to radiation grid layout, non-blocking layout, empirical layout or non-shielding layout arrangement.
3. The tower-type solar high-temperature melting industrial waste salt resource utilization system according to claim 1, characterized in that: the reflecting surface of the vertical column type heliostat is rectangular, triangular, circular or polygonal, and the length-width ratio and the angle of the mirror surface can be adjusted according to the scale of a mirror field or the longitude and latitude of a region where the heliostat is located during specific use.
4. The tower-type solar high-temperature melting industrial waste salt resource utilization system according to claim 1, characterized in that: the column heliostat is made of composite materials integrated by glass foam and glass sandwich with spherical curvature.
5. The tower-type solar high-temperature melting industrial waste salt resource utilization system according to claim 1, characterized in that: the waste salt melting treatment system comprises a molten salt heat exchange device arranged inside a tower-type heat collector, wherein an inlet at the top of the molten salt heat exchange device is connected with an outlet of an industrial waste salt storage tank through a waste salt feeding device, an outlet at the bottom of the molten salt heat exchange device is connected with an inlet of a high-temperature molten salt storage tank through a molten salt conveying pipeline, an outlet of the high-temperature molten salt storage tank is connected with a molten salt nozzle of a centrifugal granulating device through a pipeline, and a salt particle collecting device of the centrifugal granulating device is connected with a molten salt waste heat recovery system.
6. The tower-type solar high-temperature melting industrial waste salt resource utilization system according to claim 5, characterized in that: the industrial waste salt storage tank and the high-temperature molten salt storage tank are consistent in structure and respectively comprise a tank body, and a temperature probe, a pressure probe and a flow probe are respectively arranged in the tank body; the tank body is made of heat insulation materials.
7. The tower-type solar high-temperature melting industrial waste salt resource utilization system according to claim 1, characterized in that: the centrifugal granulating device can adopt a rotating cup type granulator, a roller type granulator and a rotating disk type granulator.
8. The tower-type solar high-temperature melting industrial waste salt resource utilization system according to claim 1, characterized in that: the molten salt waste heat recovery system comprises a waste heat recovery device and a salt granule conveying belt, wherein an inlet of the waste heat recovery device is connected with an outlet of the salt granule collecting device of the centrifugal granulating device through a pipeline, and an outlet of the waste heat recovery device is opposite to the salt granule conveying belt.
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| CN202210741092.3A CN115090660A (en) | 2022-06-28 | 2022-06-28 | Tower-type solar high-temperature melting industrial waste salt resource utilization system |
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| CN202210741092.3A CN115090660A (en) | 2022-06-28 | 2022-06-28 | Tower-type solar high-temperature melting industrial waste salt resource utilization system |
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2022
- 2022-06-28 CN CN202210741092.3A patent/CN115090660A/en active Pending
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