Summary of the invention
The present invention provides a kind of steam heat pump sludge drying systems, and its purpose is to solve existing electric heating pump sludge
Drying technique often faces that factory transformer capacity is insufficient and the situation of steam affluence in practical applications, and it is further to constrain it
The problem of popularization.
In order to achieve the above object, the present invention provides a kind of steam heat pump sludge drying system, including a sludge baking oven,
One evaporator, a generator, an absorption tower, a preheater and a condenser;
A wet mud feed inlet and a dry mud discharge port, the top of the sludge baking oven and institute are provided on the sludge baking oven
Evaporator is stated by the first air line, the evaporator and the condenser are by the second air line, and described second
Air hose is arranged across the preheater, and the bottom end of the condenser and the sludge baking oven passes through third air line;
The evaporator is connected to the absorption tower by the first steam pipe, and salting liquid, institute are provided in the absorption tower
Absorption tower is stated to be connected to the preheater and respectively by the first salting liquid pipe, the first salting liquid return pipe, the absorption tower with
The generator passes through the second salting liquid pipe and the connection of the second salting liquid return pipe respectively;
A high-temperature steam entrance is provided on the generator, the generator and the condenser pass through the second steam pipe
Connection, the condenser are connected to the evaporator by a condensate pipe.
Wherein, the transmission mesh belt of multilayer is provided in the sludge baking oven, the top of the sludge baking oven is provided with a collection
Device of air and a dust-extraction unit.
Wherein, it is additionally provided with water cooling plant, including a water cooler and a cooling tower on first air hose, described first
Air hose is arranged across the water cooler, and the cooler and the cooling tower pass through a cooling water pipe and a cooling water return pipe
Connection.
Wherein, a cooling water supply port is additionally provided on the cooling tower.
Wherein, a regenerator, the second salting liquid pipe and institute are additionally provided between the absorption tower and the generator
It states the second salting liquid return pipe and both passes through the regenerator setting.
Wherein, a spray equipment, the first salting liquid return pipe and second salt are additionally provided in the absorption tower
Solution backflow pipe is connect with the spray equipment.
Wherein, a condensation-water drain is provided on the water cooler, the evaporator and the generator.
It wherein, further include a blower, a cooling water pump, a circulating pump and a throttle valve, the blower setting is described the
On one air hose, between the sludge baking oven and the water cooler, the cooling water pump is arranged described cold the blower
But on water pipe, the junction of the first salting liquid pipe and the second salting liquid pipe is arranged in the circulating pump, and the throttle valve is set
It sets on the condensate pipe.
Above scheme of the invention have it is following the utility model has the advantages that
Steam heat pump sludge drying system of the invention, uses water as refrigerant, and dense saline solution is realized as absorbent
Energy recycles in sludge drying course, substantially increases steam utilization, in installed capacity restricted and steam is rich
Abundant sludge reduction field, installed power of the invention is small, and operating cost is low, applied widely to energy utilization efficiency height,
Possess good economic value and dissemination;
Steam heat pump sludge drying system of the invention has also recycled whole tails while recycling a large amount of tail gas heat quantities
Gas avoids tail gas and damages to environment, is environmentally-friendly sludge anhydration system.
Specific embodiment
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
The present invention often faces factory's transformer capacity for existing electric heating pump sludge drying technique in practical applications
The insufficient and situation of steam affluence, provides a kind of steam heat pump sludge drying system at the problem of constraining its further genralrlization.
As shown in Figure 1, the embodiment provides a kind of steam heat pump sludge drying system, including a sludge baking oven
1, an evaporator 2, a generator 3, an absorption tower 4, a preheater 5 and a condenser 6;One is provided on the sludge baking oven 1
Wet mud feed inlet 7 and a dry mud discharge port 8, the top of the sludge baking oven 1 and the evaporator 2 are connected by the first air hose 9
Logical, the evaporator 2 is connected to the condenser 6 by the second air hose 10, and second air hose 10 passes through the preheating
Device 5 is arranged, and the condenser 6 is connected to the bottom end of the sludge baking oven 1 by third air hose 11;The evaporator 2 and institute
It states absorption tower 4 to be connected to by the first steam pipe 12, salting liquid, the absorption tower 4 and the preheating is provided in the absorption tower 4
Device 5 is connected to by the first salting liquid pipe 13, the first salting liquid return pipe 14 respectively, and the absorption tower 4 is distinguished with the generator 3
It is connected to by the second salting liquid pipe 15 with the second salting liquid return pipe 16;A high-temperature steam entrance is provided on the generator 3
17, the generator 3 is connected to the condenser 6 by the second steam pipe 18, and the condenser 6 passes through with the evaporator 2
The connection of one condensate pipe 19.
Steam heat pump sludge drying system described in the above embodiment of the present invention, the wet mud being arranged on sludge baking oven 1 into
Material mouth 7 and dry mud discharge port 8, wet mud feed inlet 7 are connected to a sludge molding machine, and molding sludge is imported in sludge baking oven 1, do
Mud discharge port 8 is connected to a Shaftless screw conveyor or scraper lifting machine, and does sealing thermal insulation processing at dry mud discharge port 8, leads to
Shaftless screw conveyor or scraper lifting machine is crossed to export the sludge of desiccation.Temperature is 90 DEG C or so by third air hose 11
Heated dry air, which is imported and swept upwards from the bottom end of sludge baking oven 1, blows sludge, and sludge drying belt is walked moisture, has absorbed water after the completion
The humid air divided is assembled on 1 top of sludge baking oven, and imports in the first air hose 9.Wherein, the desiccation temperature of entire sludge baking oven 1
Degree control is at 55 DEG C or so.It sweeps the humid air temperature after blowing and is similarly 55 DEG C or so, imported in evaporator 2 with the first air hose 9,
A finned heat exchanger is provided in evaporator 2, humid air flows through finned heat exchanger and is cooled under the action of condensed water
33 DEG C or so, cool-down dehumidification is completed, generates condensed water.Subsequent remaining air is imported again in the second air hose 10, by preheating
Dilute salting liquid preheating in device 5, using the finned heat exchanger being arranged in condenser 6, is further heated by medium temperature steam
To 90 DEG C or so, then continues to sweep sludge into sludge baking oven 1 by third air hose 11 and blow drying.
Temperature be 150 DEG C or so high-temperature steam by high-temperature steam entrance 17 enter generator 3 in, with dilute salting liquid into
Row heat exchange, dilute salting liquid evaporation generates 120 DEG C or so of medium temperature steam, then is imported in condenser 6 by the second steam pipe 18,
Heat exchange is completed with the air in condenser 6, is converted into condensed water, is then entered in evaporator 2 by condensate pipe 19, and it is wet
Air carries out heat exchange again, and humid air is cooled to 33 DEG C or so and is dehumidified.Condensed water is in evaporator 2 and humid air heat exchange
Afterwards, the Low Temperature Steam that heat of vaporization forms 30 DEG C or so is absorbed, then absorption tower 4 is entered by the first steam pipe 12, is absorbed tower 4
Interior dense saline solution absorbs.
Dense saline solution in absorption tower 4 generates 90 DEG C or so of dilute salting liquid after absorbing Low Temperature Steam, wherein a-road-through
It crosses the first salting liquid pipe 13 to enter in preheater 5, carries out heat exchange with the air in the second air hose 10, pre-add is carried out to air
Heat.Temperature is down to 70 DEG C or so to dilute salting liquid after the heat exchange, is back in absorption tower 4 by the first salting liquid return pipe 14.
Meanwhile another way dilute salting liquid is flowed into generator 3 by the second salting liquid pipe 15, carries out heat with 150 DEG C or so high-temperature steams
Exchange, 120 DEG C or so of medium temperature steam and dense saline solution are generated by evaporation, and subsequent dense saline solution passes through the second salting liquid
Return pipe 16 is back in generator 3, is completed salting liquid all the way and is recycled.
Wherein, the transmission mesh belt 20 of multilayer is provided in the sludge baking oven 1, the top of the sludge baking oven 1 is provided with
One gas collecting apparatus 21 and a dust-extraction unit 22.It is driven settable three to four layers of mesh belt 20, the movement between adjacent drive mesh belt 20
It is contrary so that distance that heated dry air flows in sludge baking oven 1 and the area contacted with sludge are bigger, drying efficiency and
Better effect.The clammy collect air for absorbing moisture in the apical position of sludge baking oven 1, is passed through plate-type dedusting by gas collecting apparatus 21
The dust-extraction units such as device or bag filter 22 remove the tiny mud granule in clammy air, prevent it from entering pipe-line system
It is interior.
Wherein, water cooling plant, including a water cooler 23 and a cooling tower 24, institute are additionally provided on first air hose 9
It states the first air hose 9 to be arranged across the water cooler 23, the cooler 23 and the cooling tower 24 pass through a cooling water pipe 25
It is connected to a cooling water return pipe 26.A cooling water supply port 27 is additionally provided on the cooling tower 24.In first air hose 9
Humid air will first pass through water cooler 23 before entering evaporator 2, and the pre- cooling of completion is exchanged with cooling water heat.Wherein in water cooler 23
It is provided with finned heat exchanger, water cooler 23 is connected to cooling tower 24, and the cooling water in cooling tower 24 is flowed by cooling water pipe 25
The finned heat exchanger surface for entering water cooler 23 is then back to humid air cool-down dehumidification by cooling water return pipe 26 again
Cooling tower 24.In addition, cooling water can be supplemented into cooling tower 24 by cooling water supply port 27, it is ensured that it can be cyclically to first
Humid air cool-down dehumidification in air hose 9.
Wherein, a regenerator 28, the second salting liquid pipe are additionally provided between the absorption tower 4 and the generator 3
15 and the second salting liquid return pipe 16 both pass through the regenerator 28 and be arranged.90 DEG C or so of dilute salting liquid enters generator
Regenerator 28 will be flowed through before 3,100 DEG C or so is preheated to by regenerator 28, enters back into generator 3, with 150 DEG C or so
High-temperature steam carries out heat exchange, generates 120 DEG C or so of dense saline solution, then flow through regenerator by the second salting liquid return pipe 16
28, the reversed convection current of dilute salting liquid with 90 DEG C or so carries out heat exchange, forms 100 DEG C or so of dense saline solution.Finally with first
70 DEG C or so of dilute salting liquid mixing, generates 80 DEG C or so of mixing salt solution in salting liquid return pipe 14.
Wherein, a spray equipment 29, the first salting liquid return pipe 14 and described are additionally provided in the absorption tower 4
Disalt solution backflow pipe 16 is connect with the spray equipment 29.100 DEG C or so of dense saline solution and 70 DEG C or so of dilute salt are molten
Liquid passes through the second salting liquid return pipe 16 respectively and the first salting liquid return pipe 14 flows into spray equipment 29, in spray equipment 29
Mixing generates 80 DEG C or so of mixing salt solution, and mixing salt solution is uniformly sprayed to absorption tower 4 finally by spray equipment 29
It is interior, it is sufficiently mixed with Low Temperature Steam, regenerates 90 DEG C or so of dilute salting liquid, form the circulation of salting liquid.The present invention passes through
Salting liquid, as refrigerant, realizes recycling for energy in sludge drying course, improves significantly as absorbent, water
The utilization rate of steam.
Wherein, a condensation-water drain 30 is provided on the water cooler 23, the evaporator 2 and the generator 3.Water
For humid air in cooler 23 under the heat exchange action of cooling water, the partial moisture in air generates condensed water, passes through water cooler
Condensation-water drain 30 on 23 is discharged.Humid air in evaporator 2 under the heat exchange action of condensed water, drops in condensate pipe 19
Temperature simultaneously further dehumidifies, and the condensed water that the partial moisture condensation in air generates will be by the condensation-water drain 30 on evaporator 2
Discharge.And the high-temperature steam in generator 3, after heat exchange occurs with dilute salting liquid, generate medium temperature steam and a certain amount of condensation
Water is discharged by the condensation-water drain 30 on generator 3.A heating coil wherein is set inside generator 3, is steamed respectively with high temperature
Vapour entrance 17 is connected with condensation-water drain 30, and high-temperature steam walks tube side, and salting liquid walks the shell of generator.
Wherein, the steam heat pump sludge drying system further includes a blower 31, a cooling water pump 32,33 and of a circulating pump
One throttle valve 34, the blower 31 are arranged on first air hose 9, and the blower 31 is located at the sludge baking oven 1 and institute
It states between water cooler 23, the first air hose of outlet 10 of blower 31 is connected with the windward side of water cooler 23, is made by blower 31
With driving humid air guiding water cooler 23 and following cycle system;The cooling water pump 32 is arranged on the cooling water pipe 25,
Driving cooling water recycles between water cooler 23 and cooling tower 24, takes away heat;The circulating pump 33 is arranged in first salt
The junction of solution conduit 13 and the second salting liquid pipe 15, for the dilute salting liquid in absorption tower 4 to be directed respectively into preheating by two-way
In device 5 and generator 3;The throttle valve 34 is arranged on the condensate pipe 19, for adjusting high and low nip pressure, controls
Condensate flow in condensate pipe 19, wherein evaporator 2 and absorption tower 4 are in low-pressure area, and generator 3 and condenser 6 are in
Higher-pressure region.
Wherein, using conventional high-temperature belt-type drying machine, 80% water content sludge desiccation per ton is to 20% hereinafter, needing 1.2
Ton steam, the exhaust gas formed after desiccation (including a large amount of vapor) discharge, serious heat loss after processing.And the present invention due to
Recycled the heat (being mainly derived from vapor) in a large amount of tail gas, 40% or so original steam usage amount can be saved, i.e., on
It states under kindred circumstances, 1 ton of sludge drying need to only use 0.72 ton of steam, it is assumed that the daily 100 tons of sludge of sewage treatment plant needs desiccation,
17520 tons of steam can be then saved every year, and steam price temporarily based on 240 yuan/ton, then can save 4,200,000 yuan, obvious energy conservation every year.
In addition the present invention has also recycled whole tail gas while recycling a large amount of tail gas heat quantities, avoids injury of the tail gas to environment.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, it can also make several improvements and retouch, these improvements and modifications
It should be regarded as protection scope of the present invention.