CN210117234U

CN210117234U - Phosphorus mud carries phosphorus evaporimeter

Info

Publication number: CN210117234U
Application number: CN201920925660.9U
Authority: CN
Inventors: 张贤根; 郭永峰; 张军峰; 陈佳
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-06-19
Filing date: 2019-06-19
Publication date: 2020-02-28
Anticipated expiration: 2029-06-19

Abstract

The phosphorus extraction evaporator effectively solves the problems of low extraction rate, water source pollution, low added value of products and high energy consumption in the traditional phosphorus sludge treatment process; the device comprises a transmission device, a shell, an upper cover, a hollow blade shaft, an integral guide base, an end cover, a sealing packing box, a rotary joint and a jacket cooling bearing seat; the device has small volume, large heat exchange area, high heat exchange efficiency, low energy consumption, high phosphorus extraction efficiency, good sealing performance, low dust concentration, small environmental pollution and convenient operation, and is ideal phosphorus sludge phosphorus extraction treatment equipment.

Description

Phosphorus mud carries phosphorus evaporimeter

Technical Field

The utility model relates to a chemical industry equipment technical field especially relates to a phosphorus mud carries phosphorus evaporimeter.

Background

Yellow phosphorus production enterprises can produce a large amount of phosphorus mud in the process of producing yellow phosphorus. 8 percent of yellow phosphorus still remains in the phosphorus mud, two traditional methods for treating the phosphorus mud are adopted, one is to prepare phosphoric acid, the added value of the phosphoric acid produced by the method is low, and the burden is caused on the aspects of storage, transportation, sale and the like of enterprises. The second processing method is as follows: the phosphorus is extracted by heating and evaporating by an external heating type rotary cylinder. The disadvantages of this method are: the diameter of the rotary cylinder is large, the processing precision is difficult to guarantee, the sealing of the equipment is difficult during operation, air easily enters the interior of the equipment and reacts with yellow phosphorus to generate phosphorus pentoxide, the phosphorus pentoxide reacts with water to generate phosphoric acid during subsequent condensation, the extraction rate of phosphorus is influenced, and pollution is caused to subsequent cooling water. In addition, the heating mode of the rotary cylinder is external gas heating, and a large amount of heat is taken away by high-temperature flue gas in normal work, so that the energy consumption of equipment is high, and the tail gas is difficult to treat.

SUMMERY OF THE UTILITY MODEL

To the above situation, for overcoming the defect of prior art, the utility model aims at providing a phosphorus mud carries phosphorus evaporimeter, the effectual traditional phosphorus mud treatment process that has solved has the extraction rate low, pollutes the water source, and the product added value is low, the problem that the energy consumption is high.

The technical scheme for solving the problems is that the phosphorus mud phosphorus extraction evaporator comprises a transmission device, a shell, an upper cover, a hollow blade shaft, an integral guide base, an end cover, a sealing packing box, a rotary joint and a jacket cooling bearing seat; the shell is sleeved with a jacket, two hollow blade shafts which are meshed with each other are arranged in the shell, the shell jacket is divided into independent sections, the hollow blade shafts are hollow, guide branch pipes corresponding to the number of the hollow blades are arranged in the shell and are communicated with a plurality of blades which are welded outside and are hollow, a guide main pipe is arranged inside the shaft head, a heat insulation layer is arranged between the guide main pipe and the shaft head, the guide main pipe is communicated with the guide branch pipes arranged in the inner cavity of the shafts and the inner cavity of the blades, a high-temperature-resistant bearing is arranged outside the shaft head and is supported by a bearing seat with a cooling jacket, a preheater is arranged in the inner cavity of the evaporator, the hollow blade shafts, the hollow blades pass through a guide.

The device has simple structure, the working temperature is 200-500 ℃, and the mutually meshed hollow blade stirring shaft and the hollow blade with the self-cleaning crushing function ensure that the phosphorus mud has even evaporation gradient and smooth flow; the temperature and the equipment structure of the phosphorus extracting system from the phosphorus sludge completely meet the technical index of phosphorus extracting from the phosphorus sludge, thereby realizing the requirement of extracting phosphorus from the phosphorus sludge, and the equipment has small volume, large heat exchange area, high heat exchange efficiency, low energy consumption, high phosphorus extracting efficiency, good sealing performance, low dust concentration, small environmental pollution and convenient operation, and is relatively ideal phosphorus sludge phosphorus extracting treatment equipment.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a plan view of the present invention.

Fig. 3 is a schematic cross-sectional view of a-a of fig. 2 according to the present invention.

Fig. 4 is a schematic cross-sectional view of B-B in fig. 3 according to the present invention.

Detailed Description

The following describes the present invention in further detail with reference to fig. 1 to 4.

As can be seen from fig. 1 to 4, the phosphorus mud extracting evaporator comprises a transmission device 2, a shell 5, an upper cover 3, a hollow blade shaft 7, an integral guide base 9, an end cover 6, a sealing stuffing box 10, a rotary joint 1 and a jacket cooling bearing seat 8; the shell 5 is externally connected with a jacket, two hollow blade shafts 7 which are meshed with each other are arranged in the shell 5, the jacket of the shell 5 is independently partitioned, the inner cavity of the evaporator is provided with a preheater 4, the hollow blade shafts 7 and the hollow blades 35 are connected with a heat source through a flow guide pipe and a high-temperature rotary joint 1, and the jacket 5 and the preheater 4 are connected with the heat source through pipelines.

The phosphorus mud extraction evaporator consists of a high-temperature rotary joint 1, a transmission device 2, an upper cover 3, a preheater 4, a shell 5, an end cover 6, a hollow blade shaft 7, a jacket cooling bearing seat 8, an integral guide base 9 and a sealing packing box 10.

The high-temperature rotary joint 1 adopts a non-contact external elastic pre-tightening element, and even if the temperature of a heat source is up to 700 ℃, the high-temperature rotary joint is still within the allowable use temperature range of the rotary joint.

The driving force of the transmission device 2 is transmitted to a large chain wheel 47 arranged on the hollow blade shaft 7 by a small chain wheel 49 arranged on a speed reducer through a chain 50, and then the hollow blade shaft 7 is driven to rotate to work by a synchronous gear 48 on the hollow blade shaft 7; the chain transmission is suitable for running under the working conditions of low speed and high temperature, so that the temperature of the hollow blade shaft 7 with the temperature not lower than 400 ℃ usually cannot be transmitted to the speed reducer and the motor through the chain 50, and the lubrication and the temperature of the motor and the speed reducer are enabled to work within the design allowable range.

The upper cover 3 is composed of a feed inlet 18, a steam exhaust port 19, a meteorological temperature measuring hole 51, a safety fire hole 26, a nitrogen gas replacement port 20, a preheater 4, a meteorological temperature measuring hole 21, a mixed gas exhaust port 22, a material level regulating valve 41, an inspection manhole 23 and an observation sight glass 15; phosphorus mud enters from the feed inlet 18, a large amount of water vapor is generated in the initial evaporation (phosphorus mud is evaporated to the gasification temperature), as a large amount of water in the phosphorus mud is evaporated in the stage, the evaporated water needs to be replaced by a large amount of heat, so the temperature in the stage cannot reach the evaporation temperature of phosphorus in the phosphorus mud, at the moment, part of the water vapor must be discharged from the water vapor exhaust port 19, a thermometer arranged in the meteorological temperature measuring hole 51 collects the meteorological temperature data in the stage and provides the meteorological temperature data to the controller as process parameters to adjust the operation of the balance equipment, at the moment, the temperature of the other part of the water vapor required by the phosphorus mud phosphorus extraction process is continuously increased through the preheater 4, finally, the phosphorus to be extracted in the phosphorus mud is carried by the water vapor to the recoverer through the mixed gas exhaust port 22 after reaching the temperature for gasification, and the phosphorus. The nitrogen replacement port 20 is used for completely replacing oxygen in the cavity in the initial operation stage of the equipment to prevent the air from reacting with phosphorus to generate phosphorus pentoxide; the position that observation sight glass 15 set up can observe the equipment completely when reinforced with the ejection of compact material and carry the operation process of the whole in-process phosphorus mud of phosphorus, and inspection manhole 23 can make equipment need not to open upper cover 3 alright with normally overhauing to the equipment inside.

The preheater 4 is only shown in one group in the figure, which can be set from 1 to 6 groups, and consists of a completely communicated pipeline, radiating fins arranged on the pipeline, a heating medium inlet 17 and a heat medium return opening 16, and does work to continuously heat and raise the temperature of the steam required by the process described by the upper cover 3 and ensure the meteorological temperature of a phosphorus extraction section; the preheater 4 may be in the form of a fluid heat medium structure, and may also comprise an electric heating or other high temperature heat source heating structure.

The shell 5 is an inner shell outer jacket structure, and the jacket is divided into a left cavity, a right cavity, two sets of heat medium backflow plates 36, two medium temperature measuring holes 14, two medium inlets 31 and two first heat medium outlets 13 (the positions of the inlets and the outlets can be changed); the inlet and outlet of the jacket heat medium and the structure are separately controlled and arranged in multiple stages; a material baffle plate 38, a material outlet 27 and a cleaning door 25 are arranged at the discharge end of the equipment; wherein, the sealing of the discharge port 27 is completed by a matched auxiliary machine; after entering the shell 5, the phosphorus mud conducts heat exchange with the inner shell and is matched with the hollow blade shaft to complete the process of forced heat exchange, evaporation, gasification, stirring, crushing and self-cleaning phosphorus extraction; the heat medium enters from the heat medium inlet 31 and transfers heat to the material through the forced circulation of the guide plate 36 and the inner shell to be heated and evaporated, and the solid gas in the jacket is discharged from the heat supply system through the forced circulation when running; after doing work, the first heat medium outlet 13 returns to re-heating circulation, the materials for lifting phosphorus are discharged from the material baffle plate and the material outlet 27 through the material baffle plate 8, and the residual materials in the shell 5 are thoroughly cleaned and discharged by the cleaning door 25 when the equipment is stopped or overhauled.

The end cover 6 consists of a cover plate body, a heat tracing jacket and a packing box seat; when the end cover 6 is completely heated, the materials or the evaporated gas and the gasified gas in the cavity are prevented from contacting with the end cover 6 and being rapidly cooled to influence the extraction efficiency of the phosphorus; the heat tracing jacket heat source is injected from the heat medium inlet 29 and is discharged from the second heat medium outlet 12 after working.

The hollow blade shaft 7 consists of two blade shafts with wedge-shaped hollow blades 35 which are mutually meshed, the shaft tube 53 of each single shaft is hollow and is communicated with a plurality of wedge-shaped blades with hollow inner cavities which are welded with the outside through a flow guide branch pipe 34, the flow guide main pipes 33 are arranged inside shaft heads 52 at two ends, a heat insulation layer 32 is arranged between the flow guide main pipes 33 and the shaft heads 52, the high-temperature resistant bearings 40 are arranged outside the shaft heads, and the hollow blade shaft 7 is fixed on the jacket cooling bearing seat 8 through the bearings 40; the hollow blade shaft 7 and the bearing 40 are fixed at the transmission end, a thermal expansion gap is reserved between the bearing at the other end and the bearing seat, and the hollow blade shaft 7 and the bearing 40 can freely expand and slide along the axial direction in the working environment of a heat engine; the heat medium circularly heats the material to the process requirement through the diversion main pipe 33 and the diversion branch pipe 34 by exchanging heat with the material through the shaft pipe 53 and the wedge-shaped hollow blade 35; the interaction of the hollow blade shaft 7 and the hollow wedge-shaped blade 35 plays a very key role in heating and flowing materials, the interaction can prevent the materials from being adhered to the hollow blade shaft 7 and the shell 5, meanwhile, the materials move in the shell 5 in an uninterrupted piston flow manner, the temperature of a heat exchange surface can be updated instantly when the materials flow each time, so that the materials can continuously obtain heat until the phosphorus to be extracted reaches the process gasification temperature to be extracted, and the temperature rise provided by the hollow blade shaft 7 enables a core heat source of the phosphorus extraction evaporator; in the whole heat exchange process, the heat medium is forcibly circulated in the hollow blade shaft 7, the flow guide main pipe 33 and the flow guide branch pipe 34, and is finally discharged through the scooping bucket 37 and the high-temperature rotary joint after acting; the distance L (figure 4) between two axial blades of the hollow blade shaft 7 and the shaft tube, the clearance H (figure 4) between the blades and the inner wall of the shell 5 and the range L of the distance M (figure 3) between single axial blades are 5mm to 50 mm; h is 5mm to 50 mm; m is 52 to 300 mm; the thickness of the heat insulation layer 32 filled in the central shaft tube 53 and the guide main tube 33 of the hollow blade shaft 7 ranges from 20mm to 100mm in all embodiments; the insulation layer 32 comprises insulation cotton, water cooling circulation, thermal radiation lining, and vacuum pumping.

The jacket cooling bearing seat 8 is characterized in that cooling of the outer ring of the bearing 40 is realized by circulating cooling water in the hollow jacket, the cooling is conducted to the inner ring through the bearing 40, the high-temperature-resistant bearing can operate at a working temperature allowed by design after cooling, and the heat insulation layer 32 is matched with the jacket cooling bearing seat 8 for cooling to control the operating temperature of the bearing to be 70-200 ℃; in all embodiments, the driving end jacket cooling bearing seat 8, the bearing 40 and the hollow blade shaft 7 are all fixed on the guide base 9, the axial thermal expansion of the hollow blade shaft 7 is limited to expand towards the other end, the bearing seat 8 at the other end reserves an expansion gap for the bearing 40 and the hollow blade shaft 7, the inner ring of the bearing 40 is fixed with the hollow blade shaft, so that the bearing 40 and the hollow blade shaft 7 can expand and slide in the bearing seat 8 along the axial direction, and the expansion gap covers 15mm to 80 mm.

The integral guide base 9 is integrally welded by adopting a steel structure, provides a uniform installation reference for core components of the phosphorus mud phosphorus extractor and guides and controls the expansion of thermal equipment, and the thermal expansion direction of the hollow blade shaft 7 is limited and guided by a jacket cooling bearing seat 8 fixed on the integral guide base 9; when the shell 5 is thermally expanded, the radial expansion is limited by the support 45 arranged on the shell 5, the stop block of the support 45 and the integral guide base 9 steel frame, so that the expansion directions of the shell 5 and the hollow blade shaft 7 are consistent, and the hollow blade shaft 7 and the interior of the shell 5 cannot interfere with each other; the shell 5 is fixed by a driving end support 45 arranged on the integral guide base 9, and the other end can expand and slide along the axial direction.

The sealing stuffing box 10 is composed of high temperature resistant stuffing and a gas distribution ring, and is used for filling mixed gas and outside air into the inner cavity of the nitrogen isolation shell 5 in the gas distribution ring during normal work to prevent air and oxygen from reacting with phosphorus after entering, wherein the stuffing and the gas ring are sealed and cover a material returning spiral or a mechanical seal.

When the utility model is used, the utility model,

the heat medium is injected into the equipment from the corresponding pipe orifice, the heat medium continuously flows through the shell jacket 5, the hollow blade shaft 7, the preheater 4 and the end cover jacket, the temperature in the cavity of the equipment and the temperature of a heat exchange surface contacted with the material are quickly raised to and controlled to be about 400 ℃, after the phosphorus mud is injected into the evaporator from the feed inlet, the phosphorus mud is mechanically stirred and uniformly and stably mixed through the double-meshed wedge-shaped hollow blade shaft, the phosphorus mud is quickly and uniformly heated, the material quickly reaches the evaporation temperature of moisture in a stroke set at the front end of the equipment, a large amount of moisture is evaporated at the moment, a large amount of heat is required for evaporation of the moisture, the heat at the front end is greatly consumed, the temperature of the phosphorus mud heated by the equipment cannot reach the gasification temperature of phosphorus in the phosphorus mud, and most of water vapor is; after the phosphorus in the phosphorus mud is gasified, the water vapor carrying the rest water vapor is further required to be heated and evaporated from the phosphorus mud along with the lapse of time, the temperature is continuously raised to about 290 ℃ through a preheater, most of heat exchanged between the phosphorus mud and a heat exchange surface is used for the gasification of the phosphorus mud in the process, when the temperature of the material is raised to 300 ℃, the phosphorus in the phosphorus mud is evaporated and gasified, and the water vapor carrying the phosphorus mud at 290 ℃ enters a collector from a mixed gas outlet, and at the moment, the phosphorus mud evaporator finishes the phosphorus extraction process.

The whole evaporator has an installation inclination angle of 1-2 degrees, the materials gradually move from the feeding end to the discharging end under the action of gravity, and the retention time of the materials in the inner cavity of the evaporator is controlled by a material baffle plate arranged above the discharging port and a material level adjusting system.

Compared with the prior art, the utility model, adopt the evaporation to carry the phosphorus method, simple process carries phosphorus efficient and productivity height, specifically summarizes and has following advantage:

1. the working temperature of the equipment can reach 500 ℃, and the process requirement of evaporating and extracting phosphorus is met;

2. the structure is reasonable, expensive accessories are not needed, and the maintenance cost for long-term use is greatly reduced;

3. forced conduction heating is adopted, all heating surfaces are covered by materials, and only little heat loss is caused;

4. the reasonable arrangement of the internal space and the heat exchange surface of the equipment realizes that a very large heat exchange area can be set by a very small occupied area of the equipment;

5. the micro negative pressure operation has no great loss of carried heat;

6. the reasonable structural design of the whole machine ensures that the heat engine runs stably and controllably;

7. the whole machine has excellent sealing performance, and does not pollute the environment or has potential safety hazard to operators.

Claims

1. The phosphorus mud phosphorus extraction evaporator is characterized by comprising a transmission device, a shell, an upper cover, a hollow blade shaft, an integral guide base, an end cover, a sealing filler box, a rotary joint and a jacket cooling bearing seat; the shell is sleeved with a jacket, two hollow blade shafts which are meshed with each other are arranged in the shell, the shell jacket is divided into independent sections, the hollow blade shafts are hollow, capillary guide pipes corresponding to the number of the hollow blades are arranged in the shell and are communicated with a plurality of blades which are welded outside and are hollow, a guide main pipe is arranged inside the shaft head, a heat insulation layer is arranged between the guide main pipe and the shaft head, the guide main pipe is communicated with the capillary guide pipes arranged in the inner cavity of the shafts and the inner cavity of the blades, high-temperature-resistant bearings are arranged outside the shaft head and are supported by a bearing seat with a cooling jacket, a preheater is arranged in the inner cavity of the evaporator, the hollow blade shafts, the hollow blades pass through the guide pipes.

2. The phosphorus mud evaporator of claim 1, wherein the driving force of the transmission device is transmitted from a small chain wheel installed on the reducer to a large chain wheel installed on the hollow blade shaft through a chain, and then the pair of hollow blade shafts are driven to rotate through a synchronous gear on the hollow blade shaft.

3. The phosphorus mud evaporator of claim 1, wherein the upper cover comprises a feed inlet, a steam exhaust port, a meteorological temperature measuring hole, a safety fire hole, a nitrogen gas replacement port, a preheater, a meteorological temperature measuring hole, a mixed gas exhaust port, a material level regulating valve, a manhole and an observation mirror.

4. The phosphorus sludge and phosphorus extraction evaporator as recited in claim 3, wherein the water vapor discharge port and the mixed gas discharge port are connected to a recovery tower.

5. The phosphorus sludge phosphorus extraction evaporator of claim 1, wherein the preheater comprises a pipeline which is completely communicated, and a heat dissipation fin, a heating medium inlet and a heat medium return opening which are arranged on the pipeline.

6. The phosphorus mud evaporator of claim 1, wherein the shell is of an inner shell and outer jacket structure, the jacket is divided into a left cavity, a right cavity, two sets of heat medium backflow plates, two medium temperature measuring holes, two medium inlets and two first heat medium outlets, and the shell is provided with a material baffle, a material outlet and a cleaning door at the material outlet end of the equipment.

7. The phosphorus sludge phosphorus extraction evaporator of claim 1, wherein the end cap comprises a cover plate body, a heat tracing jacket and a stuffing box seat.

8. The phosphorus mud of claim 1 carries phosphorus evaporator, characterized by that, the hollow blade axle is made up of two blade axles with hollow wedge-shaped blade intermeshing, the central siphon of each single axle is hollow and communicates with a plurality of hollow wedge-shaped blades of hollow inner chamber that the outside welds through the capillary conduit, there are main conduits of water conservancy diversion in the spindle nose inside both ends, there are insulating layers between main conduit of water conservancy diversion and spindle nose, the spindle nose is equipped with the high temperature resistant bearing outside, fix the hollow blade axle on jacket cooling bearing bracket through the bearing.