CN220642988U - Fischer-Tropsch slag wax processing system - Google Patents

Abstract

The utility model discloses a Fischer-Tropsch wax residue treatment system, which comprises a decomposition component and a filter pressing component, wherein the decomposition component comprises a decomposition kettle, the upper end and the lower end of the decomposition kettle are respectively provided with a feed inlet and a discharge outlet, one side of the decomposition kettle is communicated with a heat source inlet and a heat source outlet, and a stirring component is arranged in the decomposition kettle; the discharge port is communicated to the filter pressing assembly through the conveying pipe, the property difference of the Fischer-Tropsch wax and the solid catalyst is utilized, the temperature and the pressure are respectively regulated under the action of the decomposition assembly and the filter pressing assembly through fine adjustment and combination of the multi-energy field, the efficient and simple separation of the Fischer-Tropsch wax and the solid catalyst is realized, and the problems that the operation is complex and the catalyst and the Fischer-Tropsch wax cannot be efficiently separated are solved. The system can effectively separate the catalyst from the heavy wax in the slag wax, and the obtained product wax meets the requirement of the raw material wax, can be directly used as the raw material of the product wax which can be sold on the market, and has high recovery rate of the heavy wax and simple flow.

Description

Fischer-Tropsch slag wax processing system

Technical Field

The utility model relates to the field of chemical solid waste treatment, in particular to a Fischer-Tropsch wax residue treatment system.

Background

The Fischer-Tropsch reaction is a main reaction for converting coal liquefied synthetic gas on a catalyst to generate hydrocarbon, and the process mainly uses a coal-based composition as a raw material in a slurry bed reactor, and synthesizes hydrocarbon substances and Fischer-Tropsch wax under the conditions of the catalyst and certain reaction, wherein the catalyst is required to be replaced frequently to maintain the catalytic efficiency, a large amount of catalyst slag wax is discharged in the process, and the slag wax forms a filter cake after solid waste treatment, contains a large amount of wax slag and a part of non-deactivated catalyst, and is extremely easy to generate spontaneous combustion after being gathered in air and subjected to solar irradiation, so that potential safety hazards are generated. On a daily basis, fei Tuozha wax mixture can not be decomposed and can only be burned as dangerous solid waste for burying treatment, so that environmental pollution and resource waste are caused.

CN105542855a discloses a method and system for wax residue treatment, the method comprising: the slag wax is heated in sequence to melt the wax, then high-temperature separation is carried out to obtain molten wax and solid residues, and then distillation and incineration treatment are carried out on the solid residues in sequence. However, this method does not disclose how to achieve high temperature separation, and the difficulty of evaporating wax in a distillation manner is high, and incineration of wax also results in waste of wax, and recovery rate is not high.

CN110387261a discloses a treatment device and a treatment method for fischer-tropsch wax, the method comprising: (1) contacting the slag wax with an organic solvent for extraction; (2) Carrying out solid-liquid separation on the mixed liquid obtained in the step (1) to obtain a separation liquid and a separation solid phase; (3) Recycling the surface liquid phase residue of the separated solid phase; (4) Carrying out reduced pressure rectification on the separating liquid and the recovered surface liquid phase residues of the separating solid phase to obtain finished wax; the conditions for extraction included: at a standard atmospheric pressure, the temperature is 40-110 ℃. The method uses an organic solvent extraction mode to separate out solid phase catalyst residues, and then carries out reduced pressure rectification on an extraction liquid phase to obtain the finished wax. The method needs to add a subsequent separation process to separate the organic solvent and the wax, and the device conditions of the existing Fischer-Tropsch synthesis and separation process cannot be fully utilized.

CN110016364 discloses a treatment device and treatment process for fischer-tropsch wax, the process comprises: (1) Filtering the paraffin residue to obtain first paraffin residue and heavy wax, and recovering the heavy wax; (2) Extracting the first paraffin residue by using an extraction solvent to obtain a second paraffin residue and a second liquid phase stream containing the extraction solvent and heavy wax; (3) And separating the second liquid-phase material flow to obtain heavy wax and extraction solvent, and respectively recovering the heavy wax and the extraction solvent. The benzene or xylene used as extraction solvent in the method can cause doping pollution to Fischer-Tropsch reaction products in the existing production device, and influence the product quality.

CN1563280a discloses a method for separating and recovering waste cobalt-based catalyst and heavy hydrocarbon from slurry bed fischer-tropsch synthesis, which comprises: the mixture of waste cobalt-based catalyst and heavy hydrocarbon is extracted and separated by using light liquid paraffin as a solvent, and then the mixture is separated by using dimethylbenzene. However, in this method, whether liquid paraffin or xylene is used, solid-liquid separation is performed by settling after each extraction, and this extraction and settling are repeated a plurality of times; the standing sedimentation separation is long in time consumption, the separation effect is poor, repeated extraction is carried out for many times, so that the operation is complex, and finally, the solid obtained by separation still contains a large amount of liquid, and the separation further needs to be carried out by adopting a distillation method, so that the energy consumption of the whole process is increased; meanwhile, the initial distillation point of the light liquid paraffin used in the extraction process is 210 ℃, so that the light liquid paraffin put into use is difficult to recycle, and the operation cost is increased.

The main technical problem of the prior art is that the operation is complex, the operation cost is increased, and the phenomenon that manufacturers cannot go in or out occurs; the catalyst and the wax residue cannot be separated on a large scale and are respectively utilized, the product utilization rate is low, the economic benefit is not achieved, and the factory benefit standard accounting is not met.

Disclosure of Invention

In order to overcome the problems described above, the present utility model provides a Fischer-Tropsch wax processing system.

According to the utility model, by utilizing the property difference of the Fischer-Tropsch wax and the solid catalyst and through fine adjustment and combination of multiple energy fields, the temperature and the pressure are respectively regulated under the action of the decomposing kettle and the filter press, so that the efficient and simple separation of the Fischer-Tropsch wax and the solid catalyst is realized, and the problems that the operation is complex and the catalyst and the Fischer-Tropsch wax cannot be efficiently separated are solved.

The technical scheme adopted for solving the technical problems is as follows:

fei Tuozha wax treatment system comprising a decomposition component and a pressure filtration component;

the decomposing assembly comprises a decomposing kettle, wherein the upper end and the lower end of the decomposing kettle are respectively provided with a feed inlet and a discharge outlet, one side of the decomposing kettle is communicated with a heat source inlet and a heat source outlet, and a stirring assembly is also arranged in the decomposing kettle;

the discharge port is communicated to the filter pressing assembly through a conveying pipe;

the filter pressing assembly comprises a thrust plate, a compression plate and a plurality of filter plates arranged in parallel, wherein a filter chamber is formed between adjacent filter plates and is clamped with filter cloth, and the filter chamber is connected with a vent pipe communicated with the filter chamber; the upper end and the lower end of the thrust plate are respectively provided with a liquid inlet and a liquid outlet, the compaction plate is connected with a pressurizing assembly, and a filter cake collecting assembly is arranged below the filter chamber;

when the mixed liquid of Fei Tuozha wax and a heat source enters the filter pressing assembly, the mixed liquid sequentially enters each filter chamber through a liquid inlet, the mixed liquid flows through filter cloth in the filter plate pressing process by the pressing plate, catalyst solids are trapped in each filter chamber by the filter cloth to form filter cakes, gas is introduced into a vent pipe, and the filter cakes are air-dried through tiny micropores of the pipe wall; the Fischer-Tropsch wax and hot oil filtrate penetrate the filter cloth and are discharged from the liquid outlet through liquid pore canals formed by the combination of the filter plates.

Optionally, the decomposing kettle comprises a kettle body, an upper sealing head and a lower sealing head, wherein the ratio of the height to the diameter is 1-3.

Optionally, the upper end enclosure of decomposing kettle sets up to mechanical seal, stirring subassembly passes mechanical seal establishes, and it is including being located the internal agitator of cauldron and the stirring frame that is located cauldron body top, stirring frame transmission shaft has speed reducer and motor through the coupling joint.

Optionally, a jacket is arranged on the outer wall of the decomposing kettle, and the jacket is communicated with a cooling inlet and a cooling outlet.

Optionally, the heat source inlet and outlet communicated with one side of the decomposing kettle is a hot oil inlet and outlet, and a temperature measuring element is arranged in the kettle body below the heat source inlet and outlet.

Optionally, an inspection inlet is arranged at the top end of the kettle body of the decomposing kettle.

Optionally, a glass tube liquid level meter is arranged in the decomposing kettle and used for determining the capacity of the flowing Fischer-Tropsch wax.

Optionally, the press assembly further comprises a cross beam for supporting and securing other assemblies.

Optionally, the interception range of the filter cloth is solid particles with the particle size smaller than 1 mu m.

Optionally, the pressurizing assembly comprises an oil cylinder, a piston and a pressure gauge.

Optionally, the filter cake collection assembly includes a collection tank and a horizontal stirring paddle mounted therein.

Optionally, the breather pipe in the filter chamber is all communicated to a gas distribution pipe, the gas distribution pipe transversely sets up in each filter plate one side, and it has air inlet and gas outlet, the air inlet is equipped with the air inlet valve.

Optionally, the filter pressing subassembly still is connected with clean subassembly, clean subassembly includes clean water tank, tap and clean pipe for clean water flows through filter plate and filter chamber, washes the filter pressing subassembly, and the filter cake is collected the subassembly in the inflow at last.

The utility model has the beneficial effects that:

according to the utility model, dangerous solid waste Fei Tuozha wax is used as a treatment object, the property difference of Fischer-Tropsch wax and a waste catalyst is applied, high-temperature hot oil heated by a heat conducting oil heater is used as a heat source, fei Tuozha wax is melted under the action of a decomposing kettle, and the Fischer-Tropsch wax and the waste catalyst are efficiently separated through the filter pressing of a plate-and-frame filter press, so that the Fischer-Tropsch wax with high purity and the dried waste catalyst are collected.

The system is a slag-wax separation treatment device which is carried out under the conditions of low cost, high separation efficiency and less human resources, can furthest reduce or solve the resource waste of wax-containing filter residues, quickens the innocuity of Fischer-Tropsch wax residue treatment and the intensification of resources, meets the actual requirements of green and environment-friendly development of the modern coal chemical industry, reduces the cost of processing Fischer-Tropsch wax in factories and improves the profit of factories.

The technical key of the utility model is that a novel Fischer-Tropsch wax separating system is produced by combining two devices of a decomposing kettle and a filter press, and the structural characteristics of the two devices and the characteristics of the Fischer-Tropsch wax are combined, so that Fischer-Tropsch wax possibly existing in the catalyst is removed by controlling different temperatures and pressures, and the recovery rate of heavy wax is greatly improved (the recovery rate is more than 98 percent by weight); meanwhile, a vent pipe is arranged in the middle of a filter plate of the filter press, so that the filter cake forming time is shortened, fei Tuozha wax is kept constant by using hot oil and easily flows out from a liquid outlet, and the filter cake is assisted to wash, so that the material recovery rate is improved; and a stirring paddle is arranged in a filter cake collecting tank of the filter press, so that the post-treatment of the waste catalyst is facilitated.

Drawings

The utility model is further described with reference to the drawings and the specific embodiments below:

FIG. 1 is a system block diagram of the present utility model;

FIG. 2 is a simplified illustration of the filter press assembly of the present utility model.

Reference numerals in the drawings:

a-a decomposition component; b-a filter pressing assembly;

1-a speed reducer; a 2-coupling; 3-a stirring frame; 4-mechanical sealing; 5-a feed inlet; 6-a stirrer; 7-hot oil inlet and outlet; 8-a temperature measuring element; 9-kettle body supporting legs; 10-a discharge hole; 11-cooling inlet; 12-cooling outlet; 13-a glass tube liquid level meter; 14-checking the entrance; 15-an electric motor; 16-a liquid inlet; 17-a thrust plate; 18-a filter plate; 19-a cross beam; 20-a compacting plate; 21-a pressure gauge; 22-cleaning a water tank; 23-handle; 24-a tap; 25-water inlet; 26-water outlet; 27-an oil cylinder seat; 28-a discharge hole; 29-horizontal stirring paddles; 30-a collection tank; 31-a liquid outlet; 32-air inlet; 33-an air outlet; 34-filter cloth.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

A fischer-tropsch wax-residue processing system, referring to fig. 1, comprising a decomposition component and a pressure filtration component;

the decomposing assembly comprises a decomposing kettle, wherein the upper end and the lower end of the decomposing kettle are respectively provided with a feed inlet 5 and a discharge outlet 10, and one side of the decomposing kettle is communicated with a heat source inlet and a heat source outlet.

The heat source of the embodiment adopts heat conduction oil, and compared with the traditional heat conduction medium water and steam, the heat conduction oil has the following advantages: 1. under almost normal pressure, a higher heat transfer temperature can be obtained, the operating pressure of a high-temperature heating system is greatly reduced, and the safety of the system and equipment is improved; 2. the temperature is stable, the control is convenient, the heating temperature of the forced circulation liquid phase heat conduction oil can be automatically controlled according to the requirement of a heat utilization system, the influence of pressure factors is avoided, the temperature fluctuation is small, the heat supply temperature of a steam boiler is controlled by the regulation of the steam pressure, the influence factors are more, and the temperature fluctuation is large; 3. a water treatment system is not needed, so that the initial investment and the operation and maintenance cost of the system are reduced; 4. the method meets the process requirements of heating and cooling at different temperatures in a wider temperature range or simultaneously realizes the process requirements of high-temperature heating and low-temperature cooling by using the same heat conduction oil furnace in the same system, thereby reducing the complexity of the system and the die; 5. under the same operating temperature condition, the heat conduction oil system saves energy by at least 30 percent compared with a steam system

The top of the decomposing kettle is provided with an inspection inlet 14, the bottom of the decomposing kettle is provided with kettle body supporting legs 9, and the kettle body is also provided with a stirring assembly. When Fei Tuozha wax enters the decomposing kettle from the feed inlet 5, the wax is heated and melted under the action of a heat source, and is mixed and stirred with the heat source to become mixed liquid.

The discharge port 10 is communicated to the filter pressing assembly through a conveying pipe.

Referring to fig. 2, the filter press assembly includes a thrust plate 17, a compression plate 20, and a plurality of filter plates 18 disposed in parallel therebetween, with filter chambers formed between adjacent filter plates 18 and sandwiching filter cloths 34, the filter chambers being connected with vent tubes opening into them.

The vent pipe is arranged above each filter plate 18 and is uniformly clustered for management, fine micropores are formed in the pipe wall of the vent pipe, uniform gas transportation is carried out through the gas distribution pipe, and then the gas is sequentially introduced into each filter chamber through the capillary pipe, so that the problem that the gas pipe is extruded to damage a pipeline in the movement process of the filter plates 18 is avoided to the greatest extent.

The upper and lower ends of thrust plate 17 are provided with liquid inlet 16, liquid outlet 31 respectively, pressure plate 20 is connected with the pressurization subassembly, the filter cake collection subassembly is provided with below the filter chamber.

Optionally, the press assembly further includes a cross beam 19 for supporting and securing other assemblies.

Optionally, the interception range of the temperature-resistant filter cloth 34 is solid particles with the particle size smaller than 1 μm.

Optionally, the pressurizing assembly comprises an oil cylinder, a piston, an oil cylinder seat 27 and a pressure gauge 21.

Optionally, the cake collection assembly includes a collection tank 30 and a horizontal agitator paddle 29 mounted therein.

When the mixed liquid of Fei Tuozha wax and hot oil enters the filter pressing assembly, the mixed liquid sequentially enters each filter chamber through the liquid inlet 16, the pressing plate 20 works to enable the filter plate 18 to flow through the filter cloth 34 in the pressing process, catalyst solids are trapped in each filter chamber by the filter cloth 34 to form filter cakes, gas is introduced into the vent pipe, and the filter cakes are air-dried through fine micropores of the pipe wall; the Fischer-Tropsch wax and hot oil filtrate permeates through the filter cloth 34 and is discharged from the outlet 31 through the liquid channels formed by the combination of the individual filter plates 18.

In this embodiment, the decomposing kettle includes a kettle body, an upper end enclosure and a lower end enclosure, wherein the ratio of the height to the diameter is 3:1.

in this embodiment, the upper end enclosure of the decomposing kettle is provided with a mechanical seal 4, the stirring assembly passes through the mechanical seal 4 and comprises a stirrer 6 positioned in the kettle body and a stirring frame 3 positioned above the kettle body, and a transmission shaft of the stirring frame 3 is connected with a speed reducer 1 and a motor 15 through a coupling 2.

In this embodiment, the outer wall of the decomposing vessel is provided with a jacket, and the jacket is communicated with cooling inlet/outlet ports 11,12, and can be filled with a cooling medium such as cooling heat-conducting oil, cooling water or other cooling fluid to cool the vessel.

Optionally, a temperature measuring element 8, such as a sensor, is arranged in the kettle body below the decomposing kettle.

Optionally, a glass tube liquid level meter 13 is arranged in the decomposing kettle and is used for determining the capacity of the flowing Fischer-Tropsch wax.

Optionally, the air distribution pipe is transversely arranged at one side of each filter plate 18 and is provided with an air inlet 32 and an air outlet 33, and the air inlet 32 is provided with an air inlet valve for controlling the air flow and the air inlet time. When the gas enters the air inlet valve, the gas passes through each filter chamber to wash the filter cloth 34 and the filter cake, and after the washing is completed, the gas fluid carries a small amount of solid particles and is discharged after being bundled by the gas distribution pipe at the upper end.

Optionally, the filter pressing assembly is further connected with a cleaning assembly, the cleaning assembly and the filter cake washing share the same pipeline, so that the washing liquid can be effectively recovered with part of the filter residues, the utilization rate of the filter residues is increased, unnecessary economic losses are reduced, the filter pressing assembly comprises a cleaning water tank 22, a faucet 24, a handle 23 and a cleaning pipe, cleaning water flows through the filter plate 18 and the filter chamber, the filter pressing assembly is washed, and finally the cleaning water flows into the filter cake collecting assembly.

Example 2

A fischer-tropsch wax process as applied in example 1 comprising the steps of:

s1 preparing a heat source

Heating the heat conduction oil to 210-240 ℃ by a heating device;

s2 Fei Tuozha melting of wax

The Fischer-Tropsch wax is heated at a high temperature of 160-180 ℃ by a heating device to be melted in first order, so that solid waste is changed into liquid, and the melted wax has different viscosities at different temperatures.

S3 Fei Tuozha wax mixed liquid

The heat conducting oil after S1 is heated is sent into a decomposing kettle by a hot oil inlet and outlet 7, and the temperature in the kettle is controlled to be 160-180 ℃ by a temperature measuring element 8;

adding the Fischer-Tropsch wax after the first-order melting of S2 into a decomposing kettle, mixing the Fischer-Tropsch wax with high-temperature hot oil to perform second-order melting, fully dissolving the Fischer-Tropsch wax, and mixing and stirring the Fischer-Tropsch wax to obtain a mixed liquid; determining the capacity of adding Fischer-Tropsch wax through a glass tube liquid level meter 13;

s4 filter pressing separation

Starting the pressurizing assembly to push the compacting plates 20 to act to compact each filter plate 18, so that a filter chamber is formed between adjacent filter plates 18;

the S3 mixed liquid is conveyed to the liquid inlet 16 of the filter pressing assembly through a conveying pipe, and a feed pump is started to enable Fei Tuozha wax mixed liquid to enter each filter chamber from the liquid inlet 16 of the thrust plate 17;

the pressurizing assembly continues to act, the pressure of the pressurizing assembly is adjusted to be 5000-10000Pa, so that the compacting plates 20 continuously compact the filter plates 18, and the mixed liquid flows through the filter cloth 34: the catalyst solids are trapped in each filter chamber by the filter cloth 34 to form filter cakes, an air inlet valve is slowly opened to enable air to flow into the vent pipe, and the filter cakes are air-dried through fine micropores of the pipe wall to improve the speed of forming the filter cakes; the Fischer-Tropsch wax and hot oil filtrate permeate through the filter cloth 34, are collected and discharged from the liquid outlets 31 through liquid channels formed by combining the filter plates 18;

s5 filter cake collection

The pressurizing assembly controls the pressing plates 20 to be loosened, so that each filter plate 18 is opened, the filter cake of the waste catalyst after the filter pressing falls into the collecting tank 30, the waste catalyst is cooled and stirred for a certain time, and the non-uniform blocks are crushed and are conveyed out from the discharge port 28.

Preferably, the Fei Tuozha wax treatment process further comprises

Cooling the decomposing kettle:

after Fei Tuozha wax flows out of the decomposing kettle completely, residual heat conducting oil flows out of the hot oil inlet and outlet 7, and then the kettle body is cooled through the cooling inlet/outlet 11 and 12, so that the temperature in the kettle is reduced.

Preferably, the Fei Tuozha wax treatment process further comprises

And (3) cleaning a filter pressing assembly:

after the filter pressing separation is completed, the filter pressing assembly is washed, the tap 24 is started, the filter pressing assembly flows through the filter plate 18 and the filter chamber through the water inlet 25, finally flows into the filter cake collecting assembly, and then flows out through the water outlet 26, and whether the equipment is cleaned completely is checked.

Preferably, the Fei Tuozha wax treatment process further comprises

And (3) washing a filter cake:

during the continuous compression of the filter plate 18, the tap 24 is optionally turned on to wash the filter cake and recover valuable substances from the filter cake.

It should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.

Claims (10)

1. Fei Tuozha wax treatment system, its characterized in that: comprises a decomposing component and a filter pressing component;

the decomposing assembly comprises a decomposing kettle, wherein the upper end and the lower end of the decomposing kettle are respectively provided with a feed inlet and a discharge outlet, one side of the decomposing kettle is communicated with a heat source inlet and a heat source outlet, and a stirring assembly is also arranged in the decomposing kettle;

the discharge port is communicated to the filter pressing assembly through a conveying pipe;

the filter pressing assembly comprises a thrust plate, a compression plate and a plurality of filter plates arranged in parallel, wherein a filter chamber is formed between adjacent filter plates and is clamped with filter cloth, and the filter chamber is connected with a vent pipe communicated with the filter chamber; the upper and lower ends of thrust plate are provided with liquid inlet, liquid outlet respectively, the pressure strip is connected with the pressurization subassembly, the filter cake collection subassembly is provided with below the filter chamber.

2. The Fei Tuozha wax treatment system of claim 1, wherein:

the upper end enclosure of the decomposing kettle is arranged to be a mechanical seal, the stirring assembly penetrates through the mechanical seal to be arranged, the stirring assembly comprises a stirrer positioned in the kettle body and a stirring rack positioned above the kettle body, and a transmission shaft of the stirring rack is connected with a speed reducer and a motor through a coupling.

3. The Fei Tuozha wax treatment system of claim 1, wherein:

the outer wall of the decomposing kettle is provided with a jacket, and the jacket is communicated with a cooling inlet and a cooling outlet.

4. The Fei Tuozha wax treatment system of claim 1, wherein:

the heat source inlet and outlet communicated with one side of the decomposing kettle is a hot oil inlet and outlet, and a temperature measuring element is arranged in the kettle body below the heat source inlet and outlet.

5. The Fei Tuozha wax treatment system of claim 1, wherein:

the pressurizing assembly comprises an oil cylinder, a piston and a pressure gauge.

6. The Fei Tuozha wax treatment system of claim 1, wherein:

the breather pipes in the filter chambers are all communicated to a gas distribution pipe, the gas distribution pipe is transversely arranged on one side of each filter plate and is provided with a gas inlet and a gas outlet, and the gas inlet is provided with a gas inlet valve.

7. The Fei Tuozha wax treatment system of claim 1, wherein:

the filter pressing subassembly still is connected with clean subassembly, clean subassembly includes clean water tank, tap and clean pipe for clean water flow through filter plate and filter chamber, wash the filter pressing subassembly, flow into the filter cake at last and collect the subassembly.

8. The Fei Tuozha wax treatment system of claim 1, wherein:

an inspection inlet is arranged at the top end of the decomposing kettle body.

9. The Fei Tuozha wax treatment system of claim 1, wherein:

and a glass tube liquid level meter is arranged in the decomposing kettle and used for determining the capacity of the flowing Fischer-Tropsch wax.

10. The Fei Tuozha wax treatment system of claim 1, wherein:

the filter cake collecting assembly comprises a collecting tank and a horizontal stirring paddle arranged in the collecting tank.