CN103708702A - Energy-saving sludge drying device by utilizing recovery waste heat of vapor compression - Google Patents
Energy-saving sludge drying device by utilizing recovery waste heat of vapor compression Download PDFInfo
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- CN103708702A CN103708702A CN201410000243.5A CN201410000243A CN103708702A CN 103708702 A CN103708702 A CN 103708702A CN 201410000243 A CN201410000243 A CN 201410000243A CN 103708702 A CN103708702 A CN 103708702A
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Abstract
The invention relates to an energy-saving sludge drying device by utilizing recovery waste heat of vapor compression. The device comprises a vapor compression machine, a three-way valve, a heat exchanger and a sludge drying machine, wherein wet and cold sludge enters the sludge drying machine and is preheated and dried by utilizing the high temperature and high pressure gas which is produced by the vapor compression machine and introduced into a hollow tube of a spiral stirring sludge preheating machine; meanwhile, a part of dry and cold air introduced from the bottom of the sludge drying machine enters the heat exchanger to exchange heat with the high temperature gas produced by the vapor compression machine, the produced dry and hot air enters the sludge drying system to further take away the vapor of the wet and hot sludge on multiple conveyor belts; the other part of the dry and cold air is directly used for recovering the surplus heat of the sludge drying. The device disclosed by the invention has the advantages that the energy consumption can be effectively reduced; the system is of vertical type, so that the floor space is small; the quantity of the conveyor belts in the sludge drying system can be multiple, so that the drying efficiency is greatly improved; the stabilization, the reduction, the harmlessness and the recycling of the dried sludge are realized. The device disclosed by the invention is simple in equipment, little in initial investment, low in energy consumption and operating cost and good in sludge drying treatment effect.
Description
Technical field
The invention belongs to sludge drying technique field, be specifically related to the energy-saving sludge drying installation that a kind of vapour compression reclaims waste heat.
Background technology
Along with the quickening of Economic development, population growth and urbanization process and the raising of wastewater treatment rate, the generation of municipal sludge is also increasing, but China's sludge disposal technology and equipment but generally fall behind, the coverage ratio that mud safe handling is disposed is very low, becomes the urgent problem that current China faces.
Drying sludge is with thermal source, mud to be carried out the treatment process of deep dehydration, it can make mud significantly subtract appearance, and volume can reduce 4-5 doubly, product is stable, odorless, without causal organism, sludge product purposes after drying and other treatment is many, can be used as fertilizer, soil improvement agent, substitute energy etc.Conventional sludge drier is used the high-grade energies such as electric heating or fire coal, oil-firing boiler generation steam, not only consume mass energy, increase carbon emission, and this technology drying temperature is high, large with circumstance of temperature difference, exhaust temperature is high, and efficiency of energy utilization is low, running cost is high, is not suitable for the target for energy-saving and emission-reduction that society advocates now.The flue gas that coal-fired, oil-firing boiler thermal source produces in addition produces secondary pollution to atmosphere, needs additional gas to pollute processing costs.The another kind of usual way of drying sludge is radiant drying, and its principle, for energy is directly acted on to material, can reduce the resistance that internal heat is transmitted, and rate of drying is very fast, but thermo-efficiency is lower, and drying cost and working cost are higher.One-time investment and the working cost of sludge drying are high, have hindered to a great extent application and the popularization of drying sludge, have delayed the process that small and medium cities sludge of sewage treatment plant is processed.The mud bulk deposition of present many sewage works, has caused serious secondary pollution to environment.
Drying method for sludge is varied, but no matter uses which kind of method sludge-drying, and in drying sludge process, the wet air temperature of discharge vaporization is higher, and contained available energy is many.But, more because of the moisture that wet air contains, can not be used for convection drying mud, and temperature do not reach the standard of sludge-drying that is directly used for yet, so do not consider to recycle this part damp-heat air in much research or patent.Under green energy resource theory instructs, low-grade energy in the wet-hot steam that recycling sludge-drying produces, reduce high-grade energy consumption, improve efficiency of energy utilization, not only can reduce drying sludge process generation wet-hot steam and be dispersed into the secondary pollution forming in atmosphere, can also indirectly reduce the consumption of other energy in energy production process and the harm that environment is brought.
Existing drying sludge industrial equipments, in drying sludge process, the wet air temperature of discharge vaporization is higher, and the energy of contained recoverable is more.But, more because of the moisture that wet air contains, be directly used for the effect of sludge-drying poor, and temperature do not reach the standard of sludge-drying of being directly used for yet, so this part heat energy that can reuse is not recycled utilization.
Summary of the invention
The object of the invention is to propose the energy-saving sludge drying installation that a kind of vapour compression reclaims waste heat.The heat energy that the wet-hot steam of this device in can recycle sludge drying machine contains, is back to use and in sludge drying machine, continues sludge-drying.To solve, recycle this part low-grade energy of wet-hot steam producing in drying sludge process, reduce the consumption of high-grade energy, improve the problem of efficiency of energy utilization.
The vapour compression that the present invention proposes reclaims the energy-saving sludge drying installation of waste heat, by vapour compressor 1, T-valve 2, interchanger 3 and sludge drying machine, formed, wherein:
Sludge drying machine consists of motor 4, helical stir mud preheating machine 5, mud travelling belt 6, gas blower 7 and lagging casing 8, helical stir mud preheating machine 5 is positioned at lagging casing 8 internal upper parts, some mud travelling belt 6 is uniformly distributed in lagging casing 8, and be positioned at helical stir mud preheating machine 5 belows, lagging casing 8 inner bottom parts are provided with gas blower 7 and dewatered sludge outlet 11, by gas blower 7, cold dry air is blasted in sludge drying machine, lagging casing 8 tops are provided with wet mud import 10; Helical stir mud preheating machine 5 connects motor 4; Helical stir mud preheating machine 5 one sides are provided with hot-air inlets 5-3, and opposite side is provided with non-condensable gases relief outlet 5-1 and condensed water discharge outlet 5-2;
The damp-heat air outlet of helical stir mud preheating machine 5 bottoms connects vapour compressor 1 by pipeline, vapour compressor 1 is by the first T-valve pipeline 2-1 connecting tee valve 2, high temperature and high pressure gas in vapour compressor 1 is divided into two tunnels by T-valve 2, the second T-valve pipeline 2-2 of leading up to connects the hot-air inlets 5-3 of sludge drying machine, make a part of high temperature and high pressure gas be back to use sludge drying machine, another road is connected interchanger 3 by the 3rd T-valve pipeline 2-3 with First Heat Exchanger pipeline 3-1 successively, makes rest part high temperature and high pressure gas enter interchanger 3; The cold dry air outlet of sludge drying machine bottom one side connects interchanger 3 by the second heat exchange manifold 3-2, and interchanger 3 is provided with the 3rd heat exchange manifold 3-3 and the 4th heat exchange manifold 3-4; The high temperature and high pressure gas from vapour compressor 1 in interchanger 3 and carry out heat exchange from the cold dry air of sludge drying machine, the dry high-temperature gas producing in heat transfer process enters sludge drying machine by the 3rd heat exchange manifold 3-3; The 4th heat exchange manifold 3-4 discharges non-condensable gases and the water of condensation producing in heat transfer process.
The present invention is by vapour compressor 1, the Low Temperature Wet hot gas reclaiming can be compressed into the gas of High Temperature High Pressure from sludge drying machine, these gases heat dry air by interchanger, obtain heated dry air, make it to enter and in sludge drying machine, continue dewatered sludge, this has just effectively reclaimed the latent heat waste heat of the wet-hot steam producing in dewatered sludge process, has saved the energy.
The present invention utilizes T-valve 2, after being entered to T-valve by entrance 2-1, shunts high temperature and high pressure gas from vapour compressor 1, part gas passes through T-valve pipeline 2-2 direct reuse to sludge drying machine, part gas enters interchanger 3 by T-valve pipeline 2-3, carry out heat exchange with dry air, the dry high-temperature gas of generation is back to use in sludge drying machine.
The present invention utilizes interchanger 3, make to carry out heat exchange from the high temperature and high pressure gas of vapour compressor with the dry air entering by the second heat exchange manifold 3-2, the dry high-temperature gas producing enters sludge drying machine by the 3rd heat exchange manifold 3-3, participates in mud drying process.In the present invention, motor 4 and 5 interlocks of helical stir mud preheating machine, stir fragmentation to entering the clammy mud of sludge drying machine, is conducive to dewatered sludge rapidly and thoroughly.And utilize the clammy mud of hollow tube preheating that enters helical stir mud preheating machine from the high temperature and high pressure gas of vapour compressor, be conducive to ensuing mud drying process.
In the present invention, in sludge drying machine, used many travelling belts 6 to carry granule sludge, wherein, the quantity of travelling belt can be according to the character of mud, the time that sludge drying is required and the water content of mud regulate accordingly, this can accomplish neither to waste energy, again maximum dewatered sludge.And the layout of mud travelling belt 6 is that many travelling belts are put up and down, can greatly save like this floor space of sludge drying machine, is conducive to promoting the use of of complete assembly.
In the present invention, use gas blower 7 that extraneous cold dry air is entered from sludge drying motor spindle drum, reached like this object of utilizing cold dry air to reclaim granule sludge waste heat on travelling belt.
In the present invention, described lagging casing 8 is to be made by lagging material, and high insulating effect can reduce the calorific loss in sludge drying machine greatly, reclaims more waste heat.
In the present invention, the damp-heat air of sludge drying machine exports 12 places, and filtering net 9 has been installed, the impurity such as dust in effectively catching wet-hot steam, and filtering net is insert, is easy to periodic replacement and cleans.
A kind of vapour compression that the present invention proposes reclaims the energy-saving sludge drying installation of waste heat, compares with existing widely used sludge drier, and its feature and advantage are:
(1) this vapour compression reclaims the energy-saving sludge drying installation of waste heat, recycle this part low-grade energy of wet-hot steam producing in drying sludge process, reduce the consumption of high-grade energy, improve efficiency of energy utilization, meet the requirement of green, energy-saving and environmental protection.
(2) this vapour compression reclaims the energy-saving sludge drying installation of waste heat, in sludge drying system, use helical stir mud preheating machine that the wet mud of the system of entering is pulverized, and utilize high-temperature gas from vapour compressor to mud preheating, can significantly shorten the required time of sludge drying like this, improve sludge drying efficiency.
(3) this vapour compression reclaims the energy-saving sludge drying installation of waste heat, in sludge drying system, what use is many upper and lower three-dimensional decoration forms of travelling belt, has replaced the horizontal arranging mode of a travelling belt of general sludge drier, so greatly the floor space of economizer.
(4) this vapour compression reclaims the energy-saving sludge drying installation of waste heat, utilize T-valve that the high temperature and high pressure gas from vapour compressor is shunted, the hollow tube dewing mud that a part enters helical stir mud preheating machine carries out preheating, a part enters interchanger and new dry air carries out heat exchange, produces the higher dry gas of temperature.
(5) this vapour compression reclaims the energy-saving sludge drying installation of waste heat, by recycling steam waste heat, dewatered sludge waste heat, not only can significantly reduce the secondary pollution producing in drying sludge process, and can greatly reduce the consumption of high-grade energy in drying sludge process, so it has broad application prospects.
Accompanying drawing explanation
Fig. 1 vapour compression of the present invention reclaims the energy-saving sludge drying installation one-piece construction schematic diagram of waste heat.
Number in the figure: 1 is vapour compressor, 2 is T-valve, 2-1/2-2/2-3 is respectively first, second, third logical valve pipeline, 3 is interchanger, 3-1/3-2/3-3/3-4 is respectively the first, second, third and the 4th heat exchange manifold, and 4 is motor, and 5 is helical stir mud preheating machine, 5-1 is non-condensable gases relief outlet, 5-2 is condensed water discharge outlet, and 5-3 is hot-air inlets, and 6 is travelling belt, 7 is gas blower, 8 is lagging casing, and 9 is filtering net, and 10 is wet mud import, 11 is dewatered sludge outlet, and 12 is damp-heat air outlet.
Embodiment
The specific examples completing according to technical solution of the present invention below in conjunction with accompanying drawing 1 and contriver, the present invention is described in further detail.
Specific embodiment 1: vapour compression reclaims the operational process of the energy-saving sludge drying installation of waste heat
As shown in Figure 1, the main body of this device is mainly comprised of vapour compressor 1, T-valve 2, interchanger 3, sludge drying machine.Wherein, sludge drying machine consists of motor 4, helical stir mud preheating machine 5, mud travelling belt 6 and gas blower 7 again.In addition, on T-valve 2, there are the first logical valve pipeline 2-1, two-port valve pipeline 2-2, T-valve pipeline 2-3, on interchanger 3, there are pipeline First Heat Exchanger pipeline 3-1, the second heat exchange manifold 3-2, the 3rd heat exchange manifold 3-3 and the 4th heat exchange manifold 3-4, on helical stir mud preheating machine, there is pipeline non-condensable gases relief outlet 5-1, condensed water discharge outlet 5-2, hot-air inlets 5-3.
In device operational process, the damp-heat air in sludge drying machine enters vapour compressor 1 from damp-heat air outlet 12 is flowed out, and produces high temperature and high pressure steam, from the first T-valve pipeline 2-1, enters T-valve 2; High temperature and high pressure gas is shunted by T-valve 2, and a part separates from the second T-valve pipeline 2-2, by the hot air inlet 5-3 on helical stir mud preheating machine 5, enters sludge drying machine; Motor 4 drives helical stir mud preheating machines 5 to rotate, and pulverize wet mud import 10 and enter the wet mud of sludge drying machine, and the high-temperature gas that enters the hollow tube of helical stir mud preheating machine 5 from hot air inlet 5-3 carries out preheating to the wet mud of pulverizing; The non-condensable gases producing in warm and water of condensation are discharged sludge drying machine by non-condensable gases pipeline 5-1 and condensate line 5-2 respectively.
Another part warm air distributing from the 3rd T-valve pipeline 2-3 enters interchanger 3 from First Heat Exchanger pipeline 3-1, gas blower 7 blasts the waste heat of the freezing air recovery dewatered sludge of sludge drying machine, the dry air that reclaims dewatered sludge waste heat blasts interchanger 3 from the second heat exchange manifold 3-2, two strands of hot and cold airs are in the interior heat exchange of interchanger 3, the non-condensable gases that heat transfer process produces and water of condensation are discharged from the 4th heat exchange manifold 3-4 of interchanger 3, and some heated dry airs that produce in this process enter sludge drying machine from the 3rd heat exchange manifold 3-3 and participate in mud drying process.These xeothermic gases enter after sludge drying machine, and flow direction is contrary with the traffic direction of travelling belt 6, through too much entering vapour compressor from exporting 12 after bar travelling belt, complete the circulation of primary sludge UTILIZATION OF VESIDUAL HEAT IN.
Claims (3)
1. vapour compression reclaims an energy-saving sludge drying installation for waste heat, vapour compressor (1), T-valve (2), interchanger (3) and sludge drying machine, consists of, and it is characterized in that:
Sludge drying machine is by motor (4), helical stir mud preheating machine (5), mud travelling belt (6), gas blower (7) and lagging casing (8) form, helical stir mud preheating machine (5) is positioned at lagging casing (8) internal upper part, some mud travelling belts (6) are uniformly distributed in lagging casing (8), and be positioned at helical stir mud preheating machine (5) below, lagging casing (8) inner bottom part is provided with gas blower (7) and dewatered sludge outlet (11), by gas blower (7), cold dry air is blasted in sludge drying machine, lagging casing (8) top is provided with wet mud import (10), helical stir mud preheating machine (5) connects motor (4), helical stir mud preheating machine (5) one sides are provided with hot-air inlets (5-3), and opposite side is provided with non-condensable gases relief outlet (5-1) and condensed water discharge outlet (5-2),
The damp-heat air outlet of helical stir mud preheating machine (5) bottom connects vapour compressor (1) by pipeline, vapour compressor (1) is by the first T-valve pipeline (2-1) connecting tee valve (2), high temperature and high pressure gas in vapour compressor (1) is divided into two tunnels by T-valve (2), the second T-valve pipeline (2-2) of leading up to connects the hot-air inlets (5-3) of sludge drying machine, make a part of high temperature and high pressure gas be back to use sludge drying machine, another road is connected interchanger (3) by the 3rd T-valve pipeline (2-3) with First Heat Exchanger pipeline (3-1) successively, make rest part high temperature and high pressure gas enter interchanger (3), the cold dry air outlet of sludge drying machine bottom one side connects interchanger (3) by the second heat exchange manifold (3-2), and interchanger (3) is provided with the 3rd heat exchange manifold (3-3) and the 4th heat exchange manifold (3-4), the high temperature and high pressure gas from vapour compressor (1) in interchanger (3) and carry out heat exchange from the cold dry air of sludge drying machine, the dry high-temperature gas producing in heat transfer process enters sludge drying machine by the 3rd heat exchange manifold (3-3), the 4th heat exchange manifold (3-4) is discharged non-condensable gases and the water of condensation producing in heat transfer process.
2. device according to claim 1, the layout that it is characterized in that described mud travelling belt (6) is that many travelling belts are put up and down.
3. device according to claim 1, is characterized in that the damp-heat air outlet (12) of sludge drying machine locates to be provided with filtering net (9).
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103922557A (en) * | 2014-04-16 | 2014-07-16 | 重庆大学 | Binocular wet sludge drying equipment |
| CN105016598A (en) * | 2014-11-11 | 2015-11-04 | 浙江三联环保机械设备有限公司 | Sludge heating and drying device |
| CN106045274A (en) * | 2016-07-21 | 2016-10-26 | 山东博润工业技术股份有限公司 | MVR belt sludge drying machine |
| CN108328901A (en) * | 2018-03-29 | 2018-07-27 | 天津大学 | A kind of sludge drying mechanism integrated based on waste heat |
| CN109574453A (en) * | 2018-12-28 | 2019-04-05 | 联合瑞升（北京）科技有限公司 | A kind of evaporation energy-saving system of sludge heat drying |
| CN110204171A (en) * | 2019-07-08 | 2019-09-06 | 江苏润翔环保设备有限公司 | A kind of cryogenic condensation anhydration system and drying method for sludge for sludge granulation |
| CN110818222A (en) * | 2019-11-19 | 2020-02-21 | 苏州乐宏环保科技有限公司 | Sludge low-temperature dehumidifying dryer |
| CN111760884A (en) * | 2020-07-07 | 2020-10-13 | 无锡德林海环保科技股份有限公司 | Algae mud drying equipment and algae mud drying method |
| CN112159053A (en) * | 2020-09-28 | 2021-01-01 | 湖南航天凯天水务有限公司 | Sludge low-temperature drying and granulating integrated system |
| CN112624561A (en) * | 2020-12-18 | 2021-04-09 | 湖南长科诚享石化科技有限公司 | Sludge heat drying method |
| CN112624562A (en) * | 2020-12-18 | 2021-04-09 | 湖南长科诚享石化科技有限公司 | Sludge heat drying system and application thereof in sludge heat drying |
| CN118359354A (en) * | 2023-11-24 | 2024-07-19 | 武汉中科固废资源产业技术研究院有限公司 | Sludge low-carbon regenerated auxiliary cementing material integrated equipment |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103922557A (en) * | 2014-04-16 | 2014-07-16 | 重庆大学 | Binocular wet sludge drying equipment |
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| CN106045274A (en) * | 2016-07-21 | 2016-10-26 | 山东博润工业技术股份有限公司 | MVR belt sludge drying machine |
| CN108328901A (en) * | 2018-03-29 | 2018-07-27 | 天津大学 | A kind of sludge drying mechanism integrated based on waste heat |
| CN109574453A (en) * | 2018-12-28 | 2019-04-05 | 联合瑞升（北京）科技有限公司 | A kind of evaporation energy-saving system of sludge heat drying |
| CN110204171A (en) * | 2019-07-08 | 2019-09-06 | 江苏润翔环保设备有限公司 | A kind of cryogenic condensation anhydration system and drying method for sludge for sludge granulation |
| CN110818222A (en) * | 2019-11-19 | 2020-02-21 | 苏州乐宏环保科技有限公司 | Sludge low-temperature dehumidifying dryer |
| CN111760884A (en) * | 2020-07-07 | 2020-10-13 | 无锡德林海环保科技股份有限公司 | Algae mud drying equipment and algae mud drying method |
| CN112159053A (en) * | 2020-09-28 | 2021-01-01 | 湖南航天凯天水务有限公司 | Sludge low-temperature drying and granulating integrated system |
| CN112624561A (en) * | 2020-12-18 | 2021-04-09 | 湖南长科诚享石化科技有限公司 | Sludge heat drying method |
| CN112624562A (en) * | 2020-12-18 | 2021-04-09 | 湖南长科诚享石化科技有限公司 | Sludge heat drying system and application thereof in sludge heat drying |
| CN118359354A (en) * | 2023-11-24 | 2024-07-19 | 武汉中科固废资源产业技术研究院有限公司 | Sludge low-carbon regenerated auxiliary cementing material integrated equipment |
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