CN208684747U - A kind of united sludge drying mechanism of cold and hot drying of vacuum - Google Patents

A kind of united sludge drying mechanism of cold and hot drying of vacuum Download PDF

Info

Publication number
CN208684747U
CN208684747U CN201821014298.1U CN201821014298U CN208684747U CN 208684747 U CN208684747 U CN 208684747U CN 201821014298 U CN201821014298 U CN 201821014298U CN 208684747 U CN208684747 U CN 208684747U
Authority
CN
China
Prior art keywords
drying
heat exchanger
working medium
heat
compressor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201821014298.1U
Other languages
Chinese (zh)
Inventor
田志国
蒋伯忠
成昊
朱文秀
冯华军
沈东升
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangsu Environmental Protection Technology Co Ltd Bolkow
Suzhou Industrial Technology Research Institute of ZJU
Industrial Technology Research Institute of ZJU
Original Assignee
Jiangsu Environmental Protection Technology Co Ltd Bolkow
Industrial Technology Research Institute of ZJU
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to CN2018206881247 priority Critical
Priority to CN201820688124 priority
Application filed by Jiangsu Environmental Protection Technology Co Ltd Bolkow, Industrial Technology Research Institute of ZJU filed Critical Jiangsu Environmental Protection Technology Co Ltd Bolkow
Application granted granted Critical
Publication of CN208684747U publication Critical patent/CN208684747U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model discloses a kind of united sludge drying mechanism of the cold and hot drying of vacuum, including heat pump system, it further includes drying system and hold over system that the heat pump system, which includes compressor and evaporator,;The drying system includes drying box and air pump;Setting condenser, First Heat Exchanger and fan, drying box, air pump and evaporator are in turn connected into dry air circuit in drying box;The hold over system include built-in accumulation of heat solution heat storage tank and and the second heat exchanger in the heat storage tank, the second expansion valve is set between the second heat exchanger and First Heat Exchanger;The component of each system is separately connected into countercurrent system, lyophilization system and thermal conductivity drying system, passes through valve transfer between three systems.The utility model uses the cold and hot combined drying technology of heat pump, and using thermal convection predrying, freeze-drying, depth drying three-stage drying mode gives full play to the advantage of different drying modes, under lower energy consumption, improves drying sludge efficiency.

Description

A kind of united sludge drying mechanism of cold and hot drying of vacuum
Technical field
The utility model relates to drying sludge technical fields, and in particular to a kind of united drying sludge of cold and hot drying of vacuum Device.
Background technique
The sludge that domestic urban wastewater treatment firm generates generally is dehydrated sludge by the modes such as filters pressing and centrifugation, After dehydration although moisture content of the cake has reduction, but moisture content is still higher, and mud amount is big, causes landfill and incineration disposal difficult, Therefore it needs further to dry sludge.In recent years, being constantly progressive with dry technology, based on heated drying, Solar energy, microwave, the combined dryings such as vacuum freeze drying technology have also obtained certain development.
Drying sludge generallys use high temperature or middle Low Temperature Thermal drying mode carries out deep dehydration, bent according to drying sludge rate Line, as moisture content declines, drying sludge rate once passes through constant rate period, the first falling-rate period and the second falling-rate period, together When show different characteristics of fluid state.When moisture percentage in sewage sludge is reduced to 60 ﹪~50 ﹪, sludge fluid behaviour presents thick State, internal moisture are not easy to evaporate, and cause required energy consumption to sharply increase, drying efficiency is substantially reduced.
Solution common at present is to use dewatered sludge and wet mud back-mixing, so that moisture percentage in sewage sludge is dropped to 50% or less and opens Beginning drying causes back-mixing ratio higher since the solid content of wet mud is generally lower, in addition, the heat loss of back-mixing technique is big, causes Energy consumption is higher.
For example,
Dry and vacuum freeze drying has good drying effect, material water ratio can be reduced to 1%, but it is dried Process is very long, and energy consumption is higher, is unsuitable for the dry higher sludge of moisture content, usually only in the condition that can not use heated drying It is lower just to select.
Utility model content
The utility model provides a kind of vacuum freeze drying and the integrated heat pump drying device of heated drying, cold using heat pump Heat integration dry technology, using thermal convection predrying, freeze-drying, depth drying three-stage drying mode gives full play to difference The advantage of drying mode improves drying sludge efficiency under lower energy consumption.
A kind of united sludge drying mechanism of cold and hot drying of vacuum, including heat pump system, the heat pump system include compression Machine and evaporator further include drying system and hold over system;
The drying system includes:
Air inlet, gas outlet and vacuum orifice is arranged in drying box, drying box, and the evaporation is accessed in the gas outlet of drying box Device, vacuum orifice pass through piping connection vacuum pump;
Air pump, the air inlet pipe of air pump access the air inlet of the evaporator, escape pipe access drying box, drying box, air pump Dry air circuit is in turn connected into evaporator;
And condenser, First Heat Exchanger and fan in drying box, the working medium input end of condenser pass through working medium Pipeline accesses the compressor, sender property outlet end and accesses the evaporator by working medium pipeline, connects the working medium pipeline of evaporator The first expansion valve of upper setting;
The hold over system includes:
The heat storage tank of built-in accumulation of heat solution;
And the second heat exchanger in the heat storage tank, it is swollen that second is arranged between the second heat exchanger and First Heat Exchanger Swollen valve;
Compressor, condenser, the first expansion valve, evaporator and compressor are in turn connected into working medium circuit, with the drying Air circuit forms thermal convection drying system together;Compressor, the second heat exchanger, the second expansion valve, First Heat Exchanger and compressor When being in turn connected into working medium circuit, lyophilization system is formed;Compressor, First Heat Exchanger, the second expansion valve, the second heat exchanger When being in turn connected into working medium circuit with compressor, thermal conductivity drying system is formed;The thermal convection drying system, lyophilization system It is switched between thermal conductivity drying system.
It preferably, can be by the way that four-way Vavle switching be arranged between lyophilization system and thermal conductivity drying system.
Preferably, the condenser and fan are all set at the air inlet in drying box;Fan be set to cabinet wall with It is arranged before condenser and towards condenser.
The accumulation of heat solution is sodium chloride solution;Blender is set in the heat storage tank.
Preferably, on-Line Monitor Device is set in the drying box.Mainly for detection of the temperature and pressure in drying box, On-Line Monitor Device has visual display.
Working method is as follows:
(1) thermal convection predrying
Sludge to be dried is sent into drying box, by controlling corresponding valve, is made compressor, condenser, the first expansion valve, is steamed Hair device and compressor are in turn connected into working medium circuit, and condenser is located in drying box, while air pump is connected with evaporator and air pump The air inlet and air outlet for being separately connected drying box with evaporator are linked to be dry gas circuit, open fan, Room-temperature low-pressure working medium High temperature and pressure working medium is formed after compressor compresses, and high pressure low temperature work is formed after air in condenser heating drying oven Matter becomes supercooling low pressure working fluid after the first expansion valve release, obtains the heat that drying box includes humid air in evaporator, It is restored to Room-temperature low-pressure working medium, carries out next working medium circulation process, condensed water drains into outside evaporator, in drying box after heating Air fan effect under to sludge carry out thermal convection predrying;
(2) it is freeze-dried
By switching corresponding valve, compressor, the second heat exchanger, First Heat Exchanger and compressor is made to be in turn connected into working medium Circuit, First Heat Exchanger are located in drying box, and the second heat exchanger is located in heat storage tank, and Room-temperature low-pressure working medium passes through compressor compresses High temperature and pressure working medium is formed afterwards, forms cryogenic high pressure after the accumulation of heat solution that the second heat exchanger transfers heat in heat storage tank Working medium, accumulation of heat solution temperature increase, heat be stored in poultry hot tank in, cryogenic high pressure working medium after the second expansion valve release, As supercooling low pressure working fluid, it is frozen into ice in moisture of the First Heat Exchanger transmitting cooling capacity in sludge, sludge, sludge gap occurs Expansion reverts to Room-temperature low-pressure working medium after the heat of low pressure working fluid absorption sludge is subcooled, carries out next working medium circulation process, when When sludge temperature is reduced to -20~0 DEG C in drying box, vacuum pump is opened, to form low pressure for vacuumizing in drying box;
(3) thermal conductivity is dry
When pressure reduction is less than or equal to 100Pa in drying box, make compressor, the first heat exchange by switching corresponding valve Device, the second expansion valve, the second heat exchanger and compressor are in turn connected into working medium circuit, and Room-temperature low-pressure working medium is pressurizeed by compressor It is condensed on First Heat Exchanger after heating, the heat of release is absorbed by sludge, provides energy for ice gasification for vapor;Subsequent work Matter becomes supercooling low pressure working fluid after the second expansion valve release, and recycling the heat in poultry hot tank by the second heat exchanger becomes normal Warm low pressure working fluid carries out next circulation.
It, can also be to only with one or both of three kinds of drying modes for different water cut sludge.
Preferably, the accumulation of heat solution is sodium chloride solution, and mass concentration is 5~35%;Raiseeing hot solution temperature range is 0 ~50 DEG C.
The utility model also provides
A kind of united sludge drying mechanism of cold and hot drying of batch-type vacuum, including a compressor and at least two sets of dryings System, every set drying system include evaporator, drying system and hold over system;
The drying system includes:
Air inlet, gas outlet and vacuum orifice is arranged in drying box, drying box, and the evaporation is accessed in the gas outlet of drying box Device, vacuum orifice pass through piping connection vacuum pump;
Air pump, the air inlet pipe of air pump access the air inlet of the evaporator, escape pipe access drying box, drying box, air pump Dry air circuit is in turn connected into evaporator;
And condenser, First Heat Exchanger and fan in drying box, the working medium input end of condenser pass through working medium Pipeline accesses the compressor, sender property outlet end and accesses the evaporator by working medium pipeline, connects the working medium pipeline of evaporator The first expansion valve of upper setting;
The hold over system includes:
The heat storage tank of built-in accumulation of heat solution;
And the second heat exchanger in the heat storage tank, it is swollen that second is arranged between the second heat exchanger and First Heat Exchanger Swollen valve;
Condenser, the first expansion valve, the evaporator of each set drying system are sequentially connected and connect into working medium with compressor and return Road, the working medium circuit form the dry system of thermal convection of corresponding drying system together with the drying air circuit in each set drying system System;The second heat exchanger, the second expansion valve, the First Heat Exchanger of each set drying system are sequentially connected and are in turn connected into compressor When working medium circuit, the lyophilization system of corresponding drying system is formed;The First Heat Exchanger of each set drying system, the second expansion When valve, the second heat exchanger are sequentially connected and are in turn connected into working medium circuit with compressor, the thermal conductivity for forming corresponding drying system is dry Drying system;Thermal convection drying system, lyophilization system and thermal conductivity are dry in each drying system independent control and each drying system It is switched between system;Pass through circulation series connection of pumps between the heat storage tank of each set drying system.
I.e. at least two sets of drying systems are parallel to independent operating between the compressor and each drying system;It is each dry Thermal convection drying system, lyophilization system and thermal conductivity drying system in drying system are successively run;The accumulation of heat of each drying system Case passes through circulation series connection of pumps.
Preferably, the condenser and fan are all set at the air inlet in drying box;Fan be set to cabinet wall with It is arranged before condenser and towards condenser.
Preferably, on-Line Monitor Device is set in the drying box.
Compared with prior art, the utility model has the following beneficial effects:
The utility model is had following beneficial to effect using vacuum freeze drying and the integrated Analysis of Heat Pump Drying System of heated drying Fruit:
(1) wet mud (moisture content about 75%~80%) first passes through heated drying, by moisture content be reduced to 60~50% it is viscous The sludge of thick state.By valve transfer, carry out vacuum freeze drying, the ice inside sludge distils to form vapor after extract out, into One step reduces moisture content, finally carries out depth heated drying again to sludge.
(2) evaporator and condenser for utilizing heat pump, absorb the heat of sludge in process of refrigerastion, and are stored in poultry hot charging In setting, during heating, heat passes to sludge from poultry thermal, realizes the circulation of heat.
(3) in freezing dry process, become larger since water is frozen into ice body product, increase sludge porosity, sludge internal water It is extracted out after decilitre China, further decreases moisture content, be formed simultaneously porous structure, provided well for subsequent thermal convection depth drying Condition.
(4) continue batch drying sludge, improve drying efficiency.
Detailed description of the invention
Fig. 1 is the drying system schematic diagram of the utility model list drying box.
Fig. 2 and Fig. 3 is the state 1 (Fig. 2) and state 2 (Fig. 3) schematic diagram of four-way valve.
Fig. 4 is the drying system schematic diagram of the more drying boxes of the utility model.
Appended drawing reference as shown in the figure is as follows:
1- drying box 11- condenser 12- fan
13- on-Line Monitor Device 14- air pump 15- First Heat Exchanger
21- plasticator 22- the first expansion valve the second expansion valve of 23-
24- vacuum pump 25- evaporator 26- four-way valve
27- circulating pump
3- heat storage tank 31- the second heat exchanger 32- blender
33- accumulation of heat solution
41-1#Valve 42-2#Valve 43-3#Valve
44-4#Valve 45-5#Valve 46-6#Valve
47-7#Valve 48-8#Valve 410-9#Valve
411-11#Valve 412-12#Valve 413-13#Valve
Specific embodiment
As shown in Figure 1, being illustrated by taking single drying box as an example, the drying system of the utility model includes heat-pump part, does Dry box part, accumulation of heat part and corresponding pipeline and valve portion.
Heat-pump part includes compressor 21, evaporator 25, the first expansion valve 22 and the second expansion valve 23.
Dry box part include drying box 1, air pump 14, vacuum pump 24 and condenser 11 in drying box, fan 12, First Heat Exchanger 15 and on-Line Monitor Device 13, drying box have air inlet, gas outlet, vacuum orifice and drain, air inlet Air inlet pipe is connected, is arranged 3 in air inlet pipe#Valve 43, air inlet pipe access the gas outlet of air pump 14, and the air inlet of air pump 14 passes through pipe The gas circuit outlet of evaporator 25, the gas outlet of the liquid passage inlet connection drying box of evaporator are accessed in road;Vacuum orifice passes through pipeline External vacuum pump 24, connects and 5 is arranged on the pipeline of vacuum pump#Valve 45;Drain connects blowdown piping, is arranged on blowdown piping 6#Valve 46.
Fan and condenser are arranged in drying box at air inlet, and fan is located in the box body between wall and condenser, Flabellum arranges that the sender property outlet of condenser accesses the working medium entrances of evaporator, connection condensation by working medium pipeline towards condenser The first expansion valve 22 of the working medium tube of device and evaporator road setting;The working medium entrances of condenser pass through working medium pipeline connect compressor 21 sender property outlet is arranged 1 on the connecting line#The sender property outlet of valve 41, evaporator passes through working medium pipeline connect compressor Working medium entrances, the working medium tube road setting 7#Valve 47.
Fan is fixed on the inner wall of drying box air inlet and is arranged towards condenser, and condenser will enter in drying box Air heating, hot-air convection current under fan effect, is dried sludge;On-Line Monitor Device 13 be arranged in drying box and With visual display, real-time monitoring is carried out to temperature, pressure and the humidity etc. in drying box.
Heat storage tank 31 of the heat storage unit point including built-in accumulation of heat solution 33, the blender 32 in heat storage tank and the second heat exchange A four-way valve 26 is arranged for convenience of the switching of the connection type of First Heat Exchanger and the second heat exchanger in device 31, and the of four-way valve One interface (a interface) passes through the sender property outlet of working medium pipeline connect compressor, connects the work of first interface (a interface) and compressor It is arranged 2 on matter pipeline#Valve 42, one of connector of second interface (b interface) the connection First Heat Exchanger of four-way valve, four The working medium entrances of third interface (c interface) connect compressor of port valve, the second heat exchange of the 4th interface (d interface) connection of four-way valve One of connector of device connects the working medium tube road setting 4 of third interface and compressor#Valve 44, First Heat Exchanger By working medium piping connection between another connector and another connector of the second heat exchanger, First Heat Exchanger and the are connected The second expansion valve 23 of working medium tube road setting of two heat exchangers.
Two states of four-way valve are as shown in Figures 2 and 3, and a interface and d orifice, b interface and c interface connect when state 1 It is logical;A interface and b orifice, c interface and d orifice when state 2.
Compressor 21,1#Valve 41, condenser 11, the first expansion valve 22, evaporator 25 and compressor 21 are in turn connected into Working medium circuit, while 3#Valve 43, air pump 14 and evaporator 25 connect the air inlet and air outlet of drying box, and composition thermal convection is dry Drying system;Compressor 21,2#Valve 42, four-way valve 26 (state 1), the second heat exchanger 31, the second expansion valve 23, First Heat Exchanger 15, four-way valve 26 (state 1), 4#Valve 44 and compressor are in turn connected into working medium circuit, form lyophilization system;By four-way Valve 26 switches to state 2, compressor 21,2 from state 1#Valve 42, four-way valve 26 (state 2), First Heat Exchanger 15, second are swollen Swollen valve 23, the second heat exchanger 31, four-way valve (state 2) and 4#Valve 44 is in turn connected into working medium circuit, forms thermal conductivity heat pump system System.
Thermal convection drying system, lyophilization system and thermal conductivity drying system successively switch.
The batch-type drying system of more drying systems composition as shown in figure 4, all drying boxes 1#Valve 41 and 2#Valve 42 Between pipeline parallel connection be one supervisor with compressor 21 outlet connect, by 4#Valve 44 and 7#Pipeline between valve 47 is in parallel It is connect for a supervisor with 21 entrance of compressor.The used pipeline of heat storage tank and circulating pump 27 of all poultry thermals are in parallel, each The accumulation of heat solution of heat storage tank accesses the import and export of circulating pump into, place's mouth by pipeline, and valve is respectively set on each pipeline, point It Wei 8#Valve 48,9#Valve 49,10#Valve 410,11#Valve 411,12#Valve 412 and 13#Valve 413, with 8#Valve 48~ 13#The flowing of valve 413 and circulating pump control poultry hot solution.
By 1 when dry operation#Valve 41,2#The independent operating of valve 42 and four-way valve 26 switched to realize each drying box. Operation method is the same as single drying box drying system.
Utility model works mode is as follows:
Default all valves to be in off state, four-way valve default conditions are state 1.
(1) single drying box drying system
It is dry to be divided into thermal convection predrying, freeze-drying and thermal convection depth drying three phases.
1. thermal convection predrying: opening 1#Valve 41,3#Valve 43 and 7#Valve 47 makes compressor 21,1#41 valve of valve 1, condenser 11, the first expansion valve 22, evaporator 25,7#Valve 47 and compressor 21 are sequentially connected, and form working medium circuit.It opens Fan, Room-temperature low-pressure working medium form high temperature and pressure working medium after compressor compresses, by air in condenser heating drying oven Forming high pressure low temperature working medium afterwards becomes supercooling low pressure working fluid after 22 release of the first expansion valve, obtains drying in evaporator 25 Case includes the heat of humid air, is restored to Room-temperature low-pressure working medium, carries out next working medium circulation process.Air in drying box It is heated to form hot-air on condenser, forms convection current, band after hot air sludge with sludge in drying box using fan Moisture out forms and contains wet Cryogenic air, introduces the condensation of evaporator 25 in the form of negative pressure containing humid air and forms low temperature dry air, passes through It crosses air pump 14 and is back to drier left end, the water condensed out drains into outside evaporator.
2. being freeze-dried, 1 is closed#Valve 41 and 7#Valve 47 opens 2#Valve 42,4#Valve 44 makes compressor 21,2#Valve Door 42, four-way valve 26 (state 1), the second heat exchanger 31, the second expansion valve 23, First Heat Exchanger 15, four-way valve 26 (state 1), 4#Valve 44 and compressor 21 are in turn connected to form working medium circuit.Room-temperature low-pressure working medium forms high temperature height after compressor compresses Working medium is pressed, poultry thermal is transferred heat to by the second heat exchanger 31 and forms cryogenic high pressure working medium, raise the solution in thermal Temperature increases, and heat is stored in poultry thermal.It is low to become supercooling after 23 release of the second expansion valve for cryogenic high pressure working medium Working medium is pressed, moisture of the cooling capacity in sludge, sludge is transmitted in First Heat Exchanger 15 and is frozen into ice, centainly swollen occurs in sludge gap It is swollen.Room-temperature low-pressure working medium is reverted to after the heat of working medium absorption sludge, carries out next working medium circulation process.When sludge temperature drops It (is measured by infrared radiation thermometer) when down to -20~0 DEG C, opens vacuum pump 24 and 2#Valve 45.Air in drying box is taken out It walks, forms low pressure.
3. thermal conductivity is dry
When pressure is less than or equal to 100Pa in drying box, four-way valve 26 is switched into state 2 from state 1, compressor 21, 2#Valve 42, four-way valve 26 (state 2), First Heat Exchanger 15, the second expansion valve 23, the second heat exchanger 31, four-way valve (state 2)、4#Valve 44 and compressor 21 are in turn connected to form working medium circuit, form thermal conductivity heat pump system.Working medium is pressurizeed by compressor It is condensed on First Heat Exchanger 15 after heating, the heat of release is absorbed by sludge, provides energy for ice gasification for vapor.Then Working medium becomes supercooling low pressure working fluid after 23 release of the second expansion valve, recycles the heat in poultry thermal by the second heat exchanger 31 Amount becomes Room-temperature low-pressure working medium, carries out next circulation.
In drying box, after sludge absorbs heat, ice gasification is vapor, is extracted out by vacuum pump, discharge system, simultaneously The pressure in drying box is kept to be less than or equal to 100Pa.After freeze-drying, vacuum pump 24 and 5 is closed#Valve 45 opens 6# Valve 46, outside air is inhaled into drying box, restores internal pressure to normal pressure.All devices and valve are closed, four-way is adjusted Valve is to original state (state 1).
4. thermal convection depth drying: the sludge after freeze-drying is further dried if necessary, is referred to 1. It is dry that mode continues thermal convection.Since sludge is after freeze-drying, inside has certain pore structure, and hot-air is easy to Into inside sludge, remaining moisture is taken away.
(2) more drying box parallel connection drying systems
When multiple drying boxes share a set of heat pump system, the 1 of all drying boxes#Valve 41 and 2#Pipeline between valve 42 Parallel connection connects for a supervisor and the outlet of compressor 21, by 4#Valve 44 and 7#Pipeline parallel connection between valve 47 is a supervisor It is connect with suction port of compressor.The used pipeline of all poultry thermals and circulating pump are in parallel, and with 8#Valve 48~13#It valve 413 and follows The flowing of 27 control poultry hot solution of ring pump.
By 1 when dry operation#Valve 41,2#The independent operating of valve 42 and four-way valve 26 switched to realize each drying box. Operation method is the same as (1) single drying box drying system.
Embodiment 1
The moisture content of feed sludge is 65%~80%, dry to require: moisture percentage in sewage sludge 20~40% after dry: first into 1. thermal convection is dry for row, when moisture percentage in sewage sludge is reduced to 60%, is 2. freeze-dried.
Embodiment 2
Feed sludge is digested sludge, and moisture content is 65%~80%, and content of organics is low, dry to require: dirty after dry 20% or less mud moisture content: carrying out 3. thermal conductivity drying first, when moisture percentage in sewage sludge is reduced to 60%, be 2. freeze-dried, When moisture percentage in sewage sludge is lower than 30%, it is dry that 3. thermal conductivity is carried out again.
Embodiment 3
The moisture content of feed sludge is 50%~60%, dry to require: moisture percentage in sewage sludge 20~40% after dry only carries out 2. being freeze-dried.
Embodiment 4
The moisture content of feed sludge is 50%~60%, dry to require: moisture percentage in sewage sludge 20% is hereinafter, first carry out after dry 2. being freeze-dried, when moisture percentage in sewage sludge is lower than 30%, then to carry out 1. thermal convection dry.
Embodiment 5
High-moisture percentage (80%), the sludge of high organic matter are dry to require: moisture content 25%, the first step such as secondary settling tank sludge It is dry to select thermal convection dry, it is dry to 70% when, carry out second step freeze-drying, it is dry to 40% when, carry out third step heat Drying is led, it is final dry to 25%.
Embodiment 6
Due to three drying times in stage of sludge be not it is identical, the time being usually freeze-dried can be long, heat The time of convective drying and thermal conductivity drying is short, therefore sludge residence time in drying box is unequal.In addition, sewage plant is continuously transported During row, sludge press filtration discontinuous operation, 2~3 sludge of filters pressing in one day.
The drying box of the utility model can be not only freeze-dried, but also can be dry with thermal conductivity or thermal convection, therefore can will be multiple Drying box is used in parallel, realizes continuous batch drying sludge, the utilization rate of sludge drying mechanism is maximized.
Now by taking 3 drying boxes share a set of heat pump system as an example, the results are shown in Table 1, from left to right respectively drying box 1, drying box 2, drying box 3.Drying sludge scheme are as follows: thermal convection drying stage 2h is freeze-dried stage 4h, depth drying stage 2h, detailed process see the table below.A, B, C, D indicate thermal convection drying stage, the dry rank of freeze-drying, depth drying stage and idle, word Imperial mother's bracket inner digital indicates sludge batch.
Table 1
The drying proposal of this embodiment and only as an example, when practical application should obtain optimum drying according to experiment Between, drying process is determined with this.
The foregoing is merely the specific implementation cases of the utility model patent, but the technical characteristic of the utility model patent is simultaneously Not limited to this, in the field of the utility model, made changes or modifications all cover any those skilled in the relevant art Among the scope of the patents of the utility model.

Claims (7)

1. a kind of united sludge drying mechanism of cold and hot drying of vacuum, including heat pump system, the heat pump system include compressor And evaporator, which is characterized in that further include drying system and hold over system;
The drying system includes:
Air inlet, gas outlet and vacuum orifice is arranged in drying box, drying box, and the evaporator, pumping are accessed in the gas outlet of drying box Vacuum port passes through piping connection vacuum pump;
Air pump, the air inlet pipe of air pump access the air inlet of the evaporator, escape pipe access drying box, drying box, air pump and steaming Hair device is in turn connected into dry air circuit;
And condenser, First Heat Exchanger and fan in drying box, the working medium input end of condenser pass through working medium pipeline It accesses the compressor, sender property outlet end and the evaporator is accessed by working medium pipeline, the working medium tube road for connecting evaporator is set Set the first expansion valve;
The hold over system includes:
The heat storage tank of built-in accumulation of heat solution;
And the second heat exchanger in the heat storage tank, the second expansion is set between the second heat exchanger and First Heat Exchanger Valve;
Compressor, condenser, the first expansion valve, evaporator and compressor are in turn connected into working medium circuit, return with the dry gas Road forms thermal convection drying system together;Compressor, the second heat exchanger, the second expansion valve, First Heat Exchanger and compressor are successively When connecting into working medium circuit, lyophilization system is formed;Compressor, First Heat Exchanger, the second expansion valve, the second heat exchanger and pressure When contracting machine is in turn connected into working medium circuit, thermal conductivity drying system is formed;The thermal convection drying system, lyophilization system and heat It leads and is switched between drying system.
2. sludge drying mechanism according to claim 1, which is characterized in that the condenser and fan are all set in drying box At interior air inlet;Fan is set to before cabinet wall and condenser and is arranged towards condenser.
3. sludge drying mechanism according to claim 1, which is characterized in that on-Line Monitor Device is arranged in the drying box.
4. sludge drying mechanism according to claim 1, which is characterized in that the lyophilization system and thermal conductivity drying system Between pass through four-way Vavle switching.
5. a kind of united sludge drying mechanism of cold and hot drying of batch-type vacuum, which is characterized in that including a compressor and extremely Few two sets of drying systems, every set drying system includes evaporator, drying system and hold over system;
The drying system includes:
Air inlet, gas outlet and vacuum orifice is arranged in drying box, drying box, and the evaporator, pumping are accessed in the gas outlet of drying box Vacuum port passes through piping connection vacuum pump;
Air pump, the air inlet pipe of air pump access the air inlet of the evaporator, escape pipe access drying box, drying box, air pump and steaming Hair device is in turn connected into dry air circuit;
And condenser, First Heat Exchanger and fan in drying box, the working medium input end of condenser pass through working medium pipeline It accesses the compressor, sender property outlet end and the evaporator is accessed by working medium pipeline, the working medium tube road for connecting evaporator is set Set the first expansion valve;
The hold over system includes:
The heat storage tank of built-in accumulation of heat solution;
And the second heat exchanger in the heat storage tank, the second expansion is set between the second heat exchanger and First Heat Exchanger Valve;
Condenser, the first expansion valve, the evaporator of each set drying system are sequentially connected and connect into working medium circuit with compressor, should Working medium circuit forms the thermal convection drying system of corresponding drying system together with the drying air circuit in each set drying system;Each set The second heat exchanger, the second expansion valve, the First Heat Exchanger of drying system are sequentially connected and are in turn connected into working medium with compressor and return Lu Shi forms the lyophilization system of corresponding drying system;First Heat Exchanger, the second expansion valve, second of each set drying system When heat exchanger is sequentially connected and is in turn connected into working medium circuit with compressor, the thermal conductivity drying system of corresponding drying system is formed; In each drying system independent control and each drying system between thermal convection drying system, lyophilization system and thermal conductivity drying system It switches over;Pass through circulation series connection of pumps between the heat storage tank of each set drying system.
6. sludge drying mechanism according to claim 5, which is characterized in that the condenser and fan are all set in drying box At interior air inlet;Fan is set to before cabinet wall and condenser and is arranged towards condenser.
7. sludge drying mechanism according to claim 5, which is characterized in that on-Line Monitor Device is arranged in the drying box.
CN201821014298.1U 2018-05-09 2018-06-28 A kind of united sludge drying mechanism of cold and hot drying of vacuum Active CN208684747U (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2018206881247 2018-05-09
CN201820688124 2018-05-09

Publications (1)

Publication Number Publication Date
CN208684747U true CN208684747U (en) 2019-04-02

Family

ID=65879371

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201821014298.1U Active CN208684747U (en) 2018-05-09 2018-06-28 A kind of united sludge drying mechanism of cold and hot drying of vacuum

Country Status (1)

Country Link
CN (1) CN208684747U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110240377A (en) * 2019-06-28 2019-09-17 西安建筑科技大学 Fluidized bed sludge drier and method based on freezing broken wall and heated-air drying

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110240377A (en) * 2019-06-28 2019-09-17 西安建筑科技大学 Fluidized bed sludge drier and method based on freezing broken wall and heated-air drying

Similar Documents

Publication Publication Date Title
CN103983013B (en) Novel frost-free air source hot pump water heater
CN103771680B (en) Sequencing batch waste heat recovery vacuum drying device
CN208684747U (en) A kind of united sludge drying mechanism of cold and hot drying of vacuum
CN202354304U (en) Heat pump dry production device for litchi and longan
CN105091509A (en) Vacuum drying device for heat pump
CN209197435U (en) Biological organic fertilizer raw material heat-pump dehumidification system
CN208871973U (en) Solar energy canopy
CN108609832A (en) A kind of united sludge drying mechanism of the cold and hot drying of vacuum and method
CN103217008A (en) Method and device for material drying in steam recompression mode
CN204151584U (en) A kind of air open-circuit circulating heat pump clothing-drying wardrobe
CN107594583A (en) A kind of energy-efficient drying device of fruits and vegetables low-pressure superheated steam and method
CN108088076A (en) A kind of high efficiency smart air energy thermal blower fan group and its control method
CN207280158U (en) A kind of pseudo-ginseng dryer
CN209310455U (en) A kind of composition open and close formula Analysis of Heat Pump Drying System being rapidly heated
CN109626791A (en) Sludge drying device and sludge drying method
CN206778155U (en) A kind of water cooling cold lyophilizer
CN208192092U (en) A kind of energy-efficient drying device of fruits and vegetables low-pressure superheated steam
CN205580106U (en) Preserved pork drying system
CN106731537A (en) A kind of freezing type drier
CN203286857U (en) Device for steam recompression and material drying
CN209621551U (en) Packaging type compressed air unit
CN202519173U (en) Cooling and dehumidifying air cooling device for fertilizer
CN107503098A (en) A kind of drying system
CN106871277A (en) A kind of function of mechanical steam recompression formula dehumidifier/air-conditioning system
CN209386712U (en) A kind of vacuum drier

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant