CN214060232U - Waste heat flue gas evaporation system - Google Patents
Waste heat flue gas evaporation system Download PDFInfo
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- CN214060232U CN214060232U CN202023003007.9U CN202023003007U CN214060232U CN 214060232 U CN214060232 U CN 214060232U CN 202023003007 U CN202023003007 U CN 202023003007U CN 214060232 U CN214060232 U CN 214060232U
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- waste heat
- flue gas
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Abstract
The utility model is suitable for a waste water treatment field provides a waste heat flue gas evaporation system, including innoxious preprocessing device, waste heat evaporation plant and solid-liquid separation equipment, waste water is advanced into innoxious processing device, successively add sodium hydroxide, organic sulfide and flocculating agent remove heavy metal ion, then get into waste heat evaporation plant and waste heat flue gas countercurrent contact evaporation, the moisture that evaporates is discharged along with waste heat flue gas outward, and the thick liquid that obtains of concentration gets into solid-liquid separation equipment and separates, the solid that obtains of separation is as the outward transport processing of solid useless, and the clear solution flows back to waste heat evaporation plant and continues the evaporation, whole processing procedure not only the energy consumption is low, and need not add additionally and soften the medicament; meanwhile, the waste water is subjected to harmless treatment of heavy metals, so that the generation amount of hazardous waste can be greatly reduced, and the solid treatment cost is reduced.
Description
Technical Field
The utility model belongs to energy-concerving and environment-protective field especially relates to a waste heat flue gas vaporization system.
Background
In the field of heavy metal-containing high-salinity wastewater treatment, an evaporation method is adopted at present. The salt and heavy metal ions in the wastewater can be solidified no matter the multi-effect evaporation or the MVR evaporation, so that the zero emission of the high-salt wastewater is achieved. However, the evaporation method has the disadvantages of long pretreatment process, large quantity of softening agent, high energy consumption and the like, and the solid obtained by evaporation is dangerous waste, so that the disposal cost is high. The low-temperature waste heat flue gas generated by the existing boiler or kiln is generally directly discharged, so that resources are wasted.
SUMMERY OF THE UTILITY MODEL
In view of the above problem, an object of the present invention is to provide a waste heat flue gas evaporation system, which aims to solve the above problems.
The utility model adopts the following technical scheme:
the waste heat and flue gas evaporation system comprises a harmless pretreatment device, a waste heat evaporation device and a solid-liquid separation device, the waste heat evaporation device is an air spray tower, the bottom of the air spray tower is provided with a liquid outlet, the side wall of the bottom of the air spray tower is provided with a waste heat flue gas inlet, the top of the air spray tower is provided with a waste heat flue gas outlet and a liquid injection port, the harmless pretreatment device is connected with a wastewater inlet pipe, an alkali liquor inlet pipe, an organic sulfide inlet pipe and a flocculating agent inlet pipe, the waste water outlet of the harmless pretreatment device is connected with a liquid pump, the outlet of the liquid pump is connected with the liquid injection port, a spiral spray nozzle is arranged at the upper part in the air spray tower, the inlet of the solid-liquid separation device is connected to the liquid outlet, the outlet of the solid-liquid separation device is connected with a circulating pump, the outlet of the circulating pump is connected to the inlet of the liquid pump through a circulating pipe, and a switch valve is arranged on the circulating pipe.
Furthermore, the inner wall of the air spraying tower is provided with a glass fiber reinforced plastic layer with a carbon steel lining.
Furthermore, a sewage discharge pipe is arranged on the side wall of the bottom of the harmless pretreatment device.
The utility model has the advantages that: the high-salinity wastewater is pretreated by the harmless pretreatment device, the pretreated high-salinity wastewater is treated by the waste heat evaporation device by utilizing low-temperature waste heat flue gas generated by a boiler or a kiln, the solid-liquid separation device performs solid-liquid separation on the evaporated slurry, and the liquid is returned to be evaporated again, so that the energy consumption in the whole treatment process is low, and a softening agent is not required to be added; meanwhile, the waste water is subjected to harmless treatment of heavy metals, so that the generation amount of hazardous waste can be greatly reduced, and the solid treatment cost is reduced.
Drawings
Fig. 1 is a structural diagram of a waste heat flue gas evaporation system provided by an embodiment of the present invention;
fig. 2 is a structural diagram of a partition board according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In order to explain the technical solution of the present invention, the following description is made by using specific examples.
Fig. 1 shows the structure of the waste heat flue gas evaporation system provided by the embodiment of the present invention, and only the parts related to the embodiment of the present invention are shown for convenience of description.
As shown in fig. 1, the waste heat and flue gas evaporation system provided by this embodiment includes a harmless treatment device 1, a waste heat evaporation device 2 and a solid-liquid separation device 3, the waste heat evaporation device 2 is an empty spray tower, a liquid discharge port 21 is provided at the bottom of the empty spray tower, a waste heat and flue gas inlet 22 is provided at the bottom side wall of the empty spray tower, a waste heat and flue gas outlet 23 and a liquid injection port 24 are provided at the top of the empty spray tower, the harmless treatment device 1 is connected with a waste water inlet pipe 11, an alkali liquor inlet pipe 12, an organic sulfide inlet pipe 13 and a flocculant inlet pipe 14, the waste water outlet of the harmless treatment device 1 is connected with a liquid pump 4, the outlet of the liquid pump 4 is connected to the liquid injection port 24, a spiral spray nozzle 25 is provided at the upper portion in the empty spray tower, the inlet of the solid-liquid separation device 3 is connected to the liquid discharge port 21, the outlet of the solid-liquid separation device 3 is connected with a circulation pump 5, the outlet of the circulation pump 5 is connected to the inlet of the liquid pump 5 through a circulation pipe having an on-off valve 51.
In this structure, the waste water distribution of air shower tower adopts spiral shower nozzle, not only can guarantee to distribute evenly, can be difficult for blockking up moreover. And the air-jet tower adopts a glass fiber reinforced plastic layer structure with a carbon steel lining, so that the cost is saved, and the corrosion of the tower body can be effectively prevented. The solid-liquid separation device adopts a horizontal spiral discharging centrifugal machine, and the separation efficiency is high.
In addition, a drain pipe 15 is arranged on the side wall of the bottom of the harmless pretreatment device, and precipitates generated in the harmless pretreatment device can be discharged and collected through the drain pipe.
The system has the following working procedures:
high salt waste water at first gets into innoxious preprocessing device through the waste water inlet tube, then removes heavy metal ion through various inlet tubes correspondently add sodium hydroxide, organosulfur and flocculating agent, wherein add sodium hydroxide and form the deposit and remove most heavy metal ion, then add organosulfur and form the deposit and continue to detach remaining heavy metal ion, add the flocculating agent at last and form big wadding, not only make mud-water separation easier, but also can further adsorb heavy metal ion.
The waste water without heavy metal ions enters the waste heat evaporation device through the liquid pump, the waste water is uniformly sprayed out from the spiral spray head, and simultaneously, the waste heat flue gas enters from the waste heat flue gas inlet and flows upwards, so that waste water spray liquid is in countercurrent contact with the waste heat flue gas to generate direct heat exchange, sensible heat of flue gas cooling is converted into latent heat of water evaporation, and evaporated steam is discharged from the waste heat flue gas outlet along with the waste heat flue gas.
And (3) enabling concentrated slurry generated after evaporation of the waste heat evaporation device to enter a solid-liquid separation device for dehydration, enabling the obtained solid to be transported outside as solid waste, then opening a switch valve on a circulating pipe, returning the separated clear liquid to a liquid pump through the circulating pipe, and continuing to circularly evaporate through the waste heat evaporation device.
In addition, in order to improve evaporation efficiency, two layers of partition plates 26 are arranged in the air spraying tower, a plurality of round holes are distributed on the partition plates, each round hole is provided with a cylinder 27 outwards, the upper layer of cylinder and the lower layer of cylinder are arranged in a staggered mode, meshes 28 are densely distributed on the side walls of the cylinders, the flow direction paths of air flow are increased through the partition plates and the cylinders, heat exchange time is prolonged, and heat exchange efficiency is improved. The temperature of the waste heat flue gas entering the tower is generally 110-150 ℃, and the temperature of the waste heat flue gas exiting the tower is 50-70 ℃.
The invention replaces the traditional evaporation with the evaporation of the waste heat and the smoke, thereby not only saving the energy consumption, but also not needing to use softening agent and greatly reducing the generation amount of hazardous waste.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (3)
1. A waste heat and smoke evaporation system is characterized by comprising a harmless pretreatment device, a waste heat evaporation device and a solid-liquid separation device, wherein the waste heat evaporation device is an air spray tower, the bottom of the air spray tower is provided with a liquid outlet, the side wall of the bottom of the air spray tower is provided with a waste heat and smoke inlet, the top of the air spray tower is provided with a waste heat and smoke outlet and a liquid injection port, the harmless pretreatment device is connected with a waste water inlet pipe, an alkali liquor inlet pipe, an organic sulfide inlet pipe and a flocculant inlet pipe, the waste water outlet of the harmless pretreatment device is connected with a liquid pump, the outlet of the liquid pump is connected to the liquid injection port, the upper part in the air spray tower is provided with a spiral spray head, the inlet of the solid-liquid separation device is connected to the liquid outlet, the outlet of the circulation pump is connected to the inlet of the liquid pump through a circulation pipe, the circulating pipe is provided with a switch valve.
2. The waste heat flue gas evaporation system of claim 1, wherein the inner wall of the air injection tower is provided with a glass fiber reinforced plastic layer with a carbon steel lining.
3. The waste heat and flue gas evaporation system of claim 2, wherein a drain pipe is arranged on the side wall of the bottom of the harmless pretreatment device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023003007.9U CN214060232U (en) | 2020-12-15 | 2020-12-15 | Waste heat flue gas evaporation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023003007.9U CN214060232U (en) | 2020-12-15 | 2020-12-15 | Waste heat flue gas evaporation system |
Publications (1)
| Publication Number | Publication Date |
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| CN214060232U true CN214060232U (en) | 2021-08-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202023003007.9U Active CN214060232U (en) | 2020-12-15 | 2020-12-15 | Waste heat flue gas evaporation system |
Country Status (1)
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| CN (1) | CN214060232U (en) |
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2020
- 2020-12-15 CN CN202023003007.9U patent/CN214060232U/en active Active
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