CN202945131U - Device for directly filter-pressing sludge in thermal hydrolysis - Google Patents
Device for directly filter-pressing sludge in thermal hydrolysis Download PDFInfo
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- CN202945131U CN202945131U CN2012206571671U CN201220657167U CN202945131U CN 202945131 U CN202945131 U CN 202945131U CN 2012206571671 U CN2012206571671 U CN 2012206571671U CN 201220657167 U CN201220657167 U CN 201220657167U CN 202945131 U CN202945131 U CN 202945131U
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- mud
- filtrate
- thermal hydrolysis
- sludge
- pump
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Abstract
The utility model discloses a process and equipment for directly filter-pressing sludge in thermal hydrolysis. The equipment comprises a sludge feeding pump, a sludge preheating pipe, an overheated steam source, a sludge heating pipe, an additive adding pump, a non-condensable gas outlet control valve, a thermal hydrolysis reactor, a stirring shaft, stirring blades, a sludge scraper, a filtrate temporarily-storing device, a fixed laminated sheet, a movable laminated sheet, a sludge outlet, a sludge discharge cone, a filtrate pump, a compressor, a heat exchange coil, a filtrate outlet and a heat insulating and preserving layer. According to the equipment, the sludge is subjected to thermal hydrolysis by using high-temperature high-pressure overheated steam, and meanwhile, the solid is separated from the liquid directly under the pressure of the thermal hydrolysis reactor by using a filtering assembly formed by the fixed laminated sheet and the movable laminated sheet; one part of the overheated filtrated is subjected to flash evaporation and changed into steam in the filtrate temporarily-storing device, the temperature and the pressure of the steam are increased by using the compressor and then the steam is returned to the sludge heating pipe to supplement the sludge heating heat; and the other part of the filtrate is subjected to evaporation and temperature decrease and exchanges heat with the sludge preheating pipe through the filtrate pump and the heat exchanging coil to preheat the sludge.
Description
Technical field
The utility model relates to a kind of sludge treatment technique and equipment, relates in particular to a kind for the treatment of process and equipment that dewatered sludge in sewage work is carried out further deep dehydration.
Background technology
In all problems about sewage treatment plant residual sludge treatment and disposal, the dehydration of mud is its core and key all the time.General mechanical dehydration can only reach water ratio 80% left and right, far can not satisfy the requirement of further disposal.For this reason, the technician has developed the technique of a series of deep dehydrations such as supersound process, electrodialysis process, oxide treatment, thermal treatment in succession, and wherein, thermal treatment is that one of method of practical prospect is arranged most.
Generally between 150～250 ℃, generally between 0.8～1.6Mpa, the reaction times is generally between 30～300 minutes for reaction pressure for sludge hot treatment process take deep dehydration as purpose, temperature of reaction.Under such reaction conditions, broken wall, hydrolysis can occur in the biomass cells in mud, discharge water in born of the same parents; Extracellular polymeric also can be hydrolyzed, and the retentiveness of mud is degenerated, thereby provides condition for further deep dehydration.This technique also is referred to as thermal hydrolysis.
Traditional thermal hydrolysis technique is mud to be placed in high-pressure reactor react, then cooling, step-down, more then, dewater by press filtration or centrifugal mode.In this course, the High Temperature High Pressure in reactor is not effectively utilized.Afterwards, there is the technician to utilize the mode of flash distillation, the high temperature of reactor is utilized, but the high pressure in reactor never is effectively utilized.
The utility model content
technical problem to be solved in the utility model is to provide and a kind ofly is easy to realize, can effectively utilize the direct filter-pressing device of thermal hydrolysis mud of the high temperature and high pressure of thermal hydrolysis reactor simultaneously, comprise: advance dredge pump, the mud preheating tube, source of superheated steam, the mud heating tube, additive adds pump, the non-condensable gas discharge control valve, the thermal hydrolysis reactor, stir shaft, agitating vane, scrape trowel, the filtrate working storage, fixing lamination, movable lamination, standing screw, mud mouth, the mud extraction cone, filtrate pump, compressor, heat exchange coil, filtrate outlet control valve and thermal insulating warm-keeping layer, it is characterized in that,
The filter assemblies that the thermal hydrolysis reactor outlet of the direct filter-pressing device of described thermal hydrolysis mud is comprised of fixedly lamination and movable lamination alternative arrangement, the thermal hydrolysis reactor outlet directly is connected with filter assemblies, and the filter assemblies that described fixedly lamination and movable lamination alternative arrangement form is sealed in described filtrate working storage;
Described filtrate working storage top has opening to be connected with described compressor inlet, and described filtrate working storage bottom has opening to be connected with described filtrate pump import; Described compressor outlet is connected with described mud heating tube, and described filtrate pump outlet is connected with heat exchange coil and draws; Described heat exchange coil is wound in described mud interchanger outer wall;
Gap between described mud mouth and described mud extraction cone is adjustable.
Described agitator enters described thermal hydrolysis reactor from described mud mouth.Described stir shaft is positioned at the position of thermal hydrolysis inside reactor, and agitating vane is installed, and described stir shaft is positioned at the position of filter assemblies, is equipped with and scrapes trowel.
Compared with prior art, the beneficial effect of the direct filter-pressing device of thermal hydrolysis mud of the present utility model is:
1, fixedly the filter assemblies of lamination and movable lamination alternative arrangement composition is directly connected in the thermal hydrolysis reactor outlet, utilizes the high pressure in the thermal hydrolysis reactor to carry out direct press filtration to mud, has saved and has carried out the energy consumption of press filtration after mud is cooling again; Simultaneously, the mud during high temperature, its dewatering can further reduce the water ratio of mud than good after cooling.
2, in the filtrate working storage, the High Temperature High Pressure filtrate that filters out is carried out flash distillation, and by compressor, the steam of flash distillation is carried out the pressure-raising temperature raising, be used further to the mud heating, heat utilization rate is high; Lower than the hot filtrate of boiling point, deliver to mud preheating tube preheating mud by filtrate pump after flash distillation, further improved the utilising efficiency of heat energy.
Description of drawings
Fig. 1 is the direct filter-pressing device structural representation of the thermal hydrolysis mud of the utility model embodiment;
Embodiment
Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing.
Embodiment:
The direct filter-pressing device of thermal hydrolysis mud as shown in Figure 1 comprises: advance that dredge pump 1, mud preheating tube 2, source of superheated steam 3, mud heating tube 4, additive add pump 5, non-condensable gas discharge control valve 6, thermal hydrolysis reactor 7, stir shaft 8, agitating vane 9, scrape trowel 10, filtrate working storage 11, fixedly lamination 12, movable lamination 13, standing screw 14, mud mouth 15, mud extraction cone 16, filtrate pump 17, compressor 18, heat exchange coil 19, filtrate outlet control valve 20 and thermal insulating warm-keeping layer 21.
Advancing dredge pump 1 is connected with mud preheating tube 2, mud preheating tube 2 is connected with mud heating tube 4, have two steam inlets on the mud heating tube, steam in source of superheated steam 3 and compressor 18 enters respectively in steam heating tube 4, mix with mud and heat mud, mud heating tube 4 tops have the additive entrance, and the additive that reacts required adds pump 7 to add by additive; Mud heating tube 4 is connected with thermal hydrolysis reactor 7, and heated mud reacts in thermal hydrolysis reactor 7; Have non-condensable gas outlet on thermal hydrolysis reactor 7, the non-condensable gas that produces in reaction process effluxes through non-condensable gas discharge control valve 6 is controlled; Fixedly lamination 12 and movable lamination 13 alternative arrangements, be fixed by standing screw 14, forms filter assemblies, and this filter assemblies directly is connected with 7 outlets of thermal hydrolysis reactor, and is sealed in filtrate working storage 11; The filter assemblies bottom is mud mouth 15, and there is mud extraction cone 16 mud mouth 15 belows, by regulating the gap between mud extraction cone 16 and mud mouth 15, can control pressure and filter pressure in thermal hydrolysis reactor 7.In mud mouth 15 thermotropism hydrolysis reactors, stir shaft 8 is installed, stir shaft 8 is positioned at the position of thermal hydrolysis reactor 7 inside, agitating vane 9 is installed, the mud that is used for heat of stirring hydrolysis reactor 7, make it reaction evenly, stir shaft 8 is positioned at the position of filter assemblies, is equipped with to scrape trowel 10, be used for scraping the mud that takes off on the filter assemblies wall, to upgrade filtering surface.Filtrate working storage 11 tops have opening to be connected with the import of compressor 18, and filtrate working storage 11 bottoms have opening to be connected with filtrate pump 17 imports, facilitate the use the heat in filtrate.In order to prevent heat loss, whole apparatus surface, all standing has thermal insulating warm-keeping layer 19.
The below briefly introduces as follows to the principle of work of the present embodiment:
The excess sludge of Sewage Plant is through after common dehydration, water ratio is about 80% left and right, the dewatered sludge of water ratio 80% left and right, add mud preheating tube 2 by advancing dredge pump 1, mud preheating tube 2 outsides have heat exchange coil 19 to be wound around, hot filtrate in mud and heat exchange coil 19 carries out heat exchange and is preheated, and the mud after preheating enters mud heating tube 4; Superheated vapour in source of superheated steam 3 and compressor 18 enters in mud heating tube 4, and mud is heated to 150～250 ℃ of left and right, and enters in thermal hydrolysis reactor 7, carries out the thermal hydrolysis reaction under High Temperature High Pressure; According to the technique needs, can use additive, additive adds pump 5 to add by additive, and the non-condensable gas that reaction process produces is by the controlled discharge of non-condensable gas discharge control valve 6; The non-condensable gas of discharging is by the gas treating system treatment and purification of routine.The mud completed of reaction is entered by fixedly lamination 12 and movable lamination 13 alternative arrangements by the outlet of thermal hydrolysis reactor 7 and forms filter assemblies, by means of the interior pressure of thermal hydrolysis reactor 7, mud is carried out filter-press dehydration; Why selecting to form filter assemblies by fixedly lamination 12 and movable lamination 13 alternative arrangements, is mainly to consider that the laminated filtering assembly can bear higher pressure, and after stopping up, can by rotation activity lamination 13, filtration channel be recovered.Mud after dehydration is discharged by mud mouth 15, by regulating the gap between mud mouth 15 and mud extraction cone 16, can control pressure and filter pressure in thermal hydrolysis reactor 7.In mud mouth 15 thermotropism hydrolysis reactors, stir shaft 8 is installed, this mounting means can save in the upper shed of thermal hydrolysis reactor and shaft seal is installed; Stir shaft 8 is positioned at the position of thermal hydrolysis reactor 7 inside, and agitating vane 9 is installed, and is used for the mud of heat of stirring hydrolysis reactor 7, make it reaction evenly, stir shaft 8 is positioned at the position of filter assemblies, is equipped with to scrape trowel 10, be used for scraping the mud that takes off on the filter assemblies wall, to upgrade filtering surface.The filtrate that extrudes enters in the filtrate working storage 11 of sealing, top at filtrate working storage 11, the import of compressor 18 is arranged, and the import of filtrate pump 17 is arranged at the bottom of filtrate working storage 11, under the suction function of compressor 18 and filtrate pump 17, pressure in filtrate working storage 11 just because of this pressure difference, just makes mud can utilize the pressure in thermal hydrolysis reactor 7 to carry out press filtration less than the pressure in thermal hydrolysis reactor 7, simultaneously, also made hot filtrate can carry out flash distillation.The steam that flashes off by compressor 18 pressure-raising temperature raisings, enters mud heating tube 4, be back to heating mud, lower than the hot filtrate of boiling point, enter coil heat exchanger 19 after flash distillation, carry out heat exchange with the mud in mud preheating tube 2, thereby realize the efficient utilization of heat; Owing to having carried out heat exchange with low temperature sludge, the temperature of filtrate will be even lower (generally meeting is lower than 100 ℃), and the filtrate after cooling is discharged from filtrate outlet control valve 20, and the filtrate of discharge is purified by conventional Sewage treatment systems.
Above embodiment is only exemplary embodiment of the present utility model, is not used in restriction the utility model, and protection domain of the present utility model is defined by the claims.Those skilled in the art can make various modifications or be equal to replacement the utility model in essence of the present utility model and protection domain, this modification or be equal to replacement and also should be considered as dropping in protection domain of the present utility model.
Claims (4)
1. direct filter-pressing device of thermal hydrolysis mud comprises: advance that dredge pump, mud preheating tube, source of superheated steam, mud heating tube, additive add pump, non-condensable gas discharge control valve, thermal hydrolysis reactor, stir shaft, agitating vane, scrape trowel, filtrate working storage, fixedly lamination, movable lamination, standing screw, mud mouth, mud extraction cone, filtrate pump, compressor, heat exchange coil, filtrate outlet control valve and thermal insulating warm-keeping layer; It is characterized in that,
The filter assemblies that the thermal hydrolysis reactor outlet of the direct filter-pressing device of described thermal hydrolysis mud is comprised of fixedly lamination and movable lamination alternative arrangement, the thermal hydrolysis reactor outlet directly is connected with filter assemblies, and the filter assemblies that described fixedly lamination and movable lamination alternative arrangement form is sealed in described filtrate working storage.
2. the direct filter-pressing device of thermal hydrolysis mud according to claim 1, is characterized in that, described filtrate working storage top has opening to be connected with described compressor inlet, and described filtrate working storage bottom has opening to be connected with described filtrate pump import; Described compressor outlet is connected with described mud heating tube, and described filtrate pump outlet is connected with heat exchange coil and draws; Described heat exchange coil is wound in described mud interchanger outer wall.
3. the direct filter-pressing device of thermal hydrolysis mud according to claim 1, is characterized in that, the gap between described mud mouth and described mud extraction cone is adjustable.
4. the direct filter-pressing device of thermal hydrolysis mud according to claim 1, it is characterized in that, described stir shaft enters described sludge hot hydrolysis reactor from described mud mouth, described stir shaft is positioned at the position of thermal hydrolysis inside reactor, agitating vane is installed, described stir shaft is positioned at the position of filter assemblies, is equipped with to scrape trowel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206571671U CN202945131U (en) | 2012-12-04 | 2012-12-04 | Device for directly filter-pressing sludge in thermal hydrolysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206571671U CN202945131U (en) | 2012-12-04 | 2012-12-04 | Device for directly filter-pressing sludge in thermal hydrolysis |
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| Publication Number | Publication Date |
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| CN202945131U true CN202945131U (en) | 2013-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012206571671U Withdrawn - After Issue CN202945131U (en) | 2012-12-04 | 2012-12-04 | Device for directly filter-pressing sludge in thermal hydrolysis |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102976576A (en) * | 2012-12-04 | 2013-03-20 | 轻工业环境保护研究所 | Direct pressure filter for sludge pyrohydrolysis |
| CN103265156A (en) * | 2013-06-18 | 2013-08-28 | 江苏迈克化工机械有限公司 | Thermal decomposition device for sludge |
| WO2017082732A1 (en) * | 2015-11-11 | 2017-05-18 | Dmt Ip & Technology B.V. | Method and installation for high-temperature separation of hydrolyzed biomass |
| TWI692371B (en) * | 2019-09-06 | 2020-05-01 | 台灣卜力斯股份有限公司 | Pressure filter drying equipment using functions of heat pump and steam compressor |
-
2012
- 2012-12-04 CN CN2012206571671U patent/CN202945131U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102976576A (en) * | 2012-12-04 | 2013-03-20 | 轻工业环境保护研究所 | Direct pressure filter for sludge pyrohydrolysis |
| CN102976576B (en) * | 2012-12-04 | 2014-02-12 | 轻工业环境保护研究所 | Direct pressure filter for sludge pyrohydrolysis |
| CN103265156A (en) * | 2013-06-18 | 2013-08-28 | 江苏迈克化工机械有限公司 | Thermal decomposition device for sludge |
| WO2017082732A1 (en) * | 2015-11-11 | 2017-05-18 | Dmt Ip & Technology B.V. | Method and installation for high-temperature separation of hydrolyzed biomass |
| TWI692371B (en) * | 2019-09-06 | 2020-05-01 | 台灣卜力斯股份有限公司 | Pressure filter drying equipment using functions of heat pump and steam compressor |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130522 Effective date of abandoning: 20140212 |
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| RGAV | Abandon patent right to avoid regrant |