CN210496446U - Tubular reaction unit is cleared up to coal - Google Patents
Tubular reaction unit is cleared up to coal Download PDFInfo
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- CN210496446U CN210496446U CN201921368168.2U CN201921368168U CN210496446U CN 210496446 U CN210496446 U CN 210496446U CN 201921368168 U CN201921368168 U CN 201921368168U CN 210496446 U CN210496446 U CN 210496446U
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Abstract
The utility model discloses a tubular reaction unit is cleared up to coal, pipeline unit including multiunit coaxial intercommunication in proper order, tubular reaction unit is cleared up to coal wholly spirals in vertical direction, is around horizontal arrangement on overlooking the direction, pipeline unit is responsible for and the suit including the reaction that is used for the material to react in the outside jacket pipe of reaction person in charge, adjacent pipeline unit's reaction person in charge connects, and the feed inlet sets up on the reaction person in charge of lower section pipeline unit, and the discharge gate sets up on the reaction person in charge of upper section pipeline unit, and the reaction material flows from bottom to top, the reaction person in charge with vacuole formation between the jacket pipe, every have fluid inlet and fluid outlet on the jacket pipe, heat transfer medium is in flow in the cavity, heat transfer medium's flow direction is opposite with reaction material's flow direction. The coal digestion tubular reaction device can continuously and stably operate, and meets the requirements of ultra-pure coal technology amplification and industrial test.
Description
Technical Field
The utility model relates to a clean technical field of coal especially relates to a tubular reaction unit is cleared up to coal.
Background
Coal is a main energy source in China, and the traditional coal burning technology causes serious pollution to the environment and is a main source of atmospheric pollution in China. The important points on the production of clean coal and the vigorous development of clean, efficient and low-pollution clean coal technology are the necessary ways to realize high development of economy and maintain good ecological environment.
The ultra-pure coal technology is one of coal cleaning and utilizing technologies widely researched by scholars at home and abroad at present. The ultra-pure coal is ultra-low ash coal with the ash content of less than 1 percent after the coal is deeply deashed by a physical or chemical method. The ultra-pure coal can be used for preparing ultra-pure combustion liquid to replace diesel oil for a gas turbine and a low-speed diesel engine; can also be used for producing ashless metallurgical coke; producing electrode carbon, carbon black, fuel additives, etc. The use of the ultra-pure coal can effectively prevent environmental pollution.
The preparation of the ultra-pure coal at home and abroad mainly comprises two main methods, namely a chemical method and a physical coal washing method. The chemical coal washing mainly uses chemical medicines such as HCl-HF-HCl or NaOH-HCl to dissolve minerals in the coal. Australian Auscoal (Yan coal Australia UCC technology), the American Gravimelt process and the like have been successfully developed at home and abroad. The core equipment of the ausclean process is a digestion reactor.
The coal digestion device adopts a tubular reactor, the vertical structure is formed, a pipeline is composed of a plurality of groups of horizontal pipes and vertical pipes, the horizontal pipes and the vertical pipes are sequentially connected together to form a reaction pipeline, the horizontal pipes and the vertical pipes are communicated through connecting pieces, an included angle between the horizontal pipes and the vertical pipes is 90 degrees, one section of steel pipe is sleeved outside each section of vertical pipe, the steel pipe is fixed outside the vertical pipes through flange connection, one section of cavity is formed between the steel pipe and the vertical pipes, fluid in the cavity is heat conduction oil, the temperature (temperature rise, constant temperature and temperature reduction) requirements required by reaction are met, the treatment capacity of the digestion device is 2000 tons per year, and intermittent operation is adopted. During the operation process, the coal slurry in the coal digestion device flows unevenly, the coal slurry concentration of the vertical pipe section is low, and the coal slurry concentration of the horizontal pipe section is high and easy to deposit; when coal slurry flows from the vertical pipeline to the horizontal pipeline, the temperature difference between the coal slurry and the pipe wall causes the temperature of the coal slurry to be reduced, the apparent viscosity to be increased and the fluidity to be reduced, thereby causing the load of a coal slurry pump to be increased and the horizontal pipeline to be blocked; the heat conduction oil adopts an electric heating mode, the maintenance and maintenance cost of a heating system of the heat conduction oil is high, the workload is large, an oil temperature controller is easy to break down, the heat conduction oil is expensive, the service life is short, the requirements on temperature and pressure are high, and a heat exchange system needs to be designed to replace the heat conduction oil heating system; the whole device is free of an automatic control system, adopts manual control and intermittent operation, and is not beneficial to the requirement of future industrial amplification. The existing device can not meet the continuous and stable operation requirements required by the research and development of the ultra-pure coal technology, so that the tubular reaction device for coal digestion which can continuously and stably operate is required to be provided.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a tubular reaction unit is cleared up to coal, this tubular reaction unit is cleared up to coal can be continuous, steady operation, satisfies super pure coal technology and enlargies and the experimental demand of industrialization.
In order to solve the technical problem, the utility model provides a following technical scheme:
the utility model provides a tubular reaction unit is cleared up to coal, includes the pipeline unit of multiunit coaxial intercommunication in proper order, tubular reaction unit is cleared up to coal wholly spirals in vertical direction, is around horizontal arrangement on overlooking the direction, the pipeline unit is responsible for and the suit including the reaction that is used for the material to react in the outside jacket pipe is responsible for in the reaction, and is adjacent the reaction of pipeline unit is responsible for the connection, and the feed inlet sets up on the reaction of lower-most section pipeline unit is responsible for, and the discharge gate sets up on the reaction of upper-most section pipeline unit is responsible for, and reaction material flows from bottom to top, the reaction be responsible for with vacuole formation between the jacket pipe, every have fluid inlet and fluid outlet on the jacket pipe, heat transfer medium is in flow in the cavity, heat transfer medium's flow direction is opposite with reaction material's flow.
Preferably, the pipeline unit is divided into an warming area, a constant temperature area and a cooling area according to different temperatures, the spiral pipe diameter of the reaction main pipe in the warming area is increased in a gradient manner, and the spiral pipe diameters of the reaction main pipe in the constant temperature area and the cooling area are all maintained at constant values.
Preferably, the pipeline unit further comprises a disturber connected between the two sections of the reaction main pipes, the diameters of front and rear ports of the reaction main pipes in the pipeline unit are always equal, and the diameter-variable parts in the pipeline unit are arranged on the disturber.
Preferably, the disturber comprises a closing section connected with the upper reaction main pipe, an expanding section connected with the lower reaction main pipe, and a constant diameter section connecting the closing section and the expanding section.
Preferably, the maximum diameter of the closing section of the perturber in the heating area is always smaller than the maximum diameter of the flaring section; the maximum diameter of the closing section of the perturber in the constant temperature area and the cooling area is equal to the maximum diameter of the expanding section.
Preferably, the heating area is heated by heat conduction oil and steam, the constant temperature area is insulated by steam, and the cooling area is cooled by heat conduction oil and cooling water.
Preferably, the heat conducting oil is connected between the cavities of the adjacent pipeline units through pipelines, and the heat conducting oil circularly flows between the heating area and the cooling area.
Preferably, the cooling water is connected between the cavities of adjacent duct units by ducts, the fluid inlet of the initial duct unit being connected to the cooling water pipe network, and the fluid outlet of the final duct unit being connected to the cooling water pipe network.
Preferably, the steam is connected to a steam pipe network at a fluid inlet of each pipe unit, and the fluid outlet is connected to a condensed water pipe network.
Preferably, pneumatic regulating valves are arranged on a feeding port, a discharging port, an external discharging pipeline and a steam branch pipe of the coal digestion tubular reaction device, centrifugal pumps are arranged on the heat conduction oil branch pipe and the cooling water branch pipe, the centrifugal pumps are connected with a variable frequency motor, and the pneumatic regulating valves and the variable frequency motor are connected with a controller.
The utility model provides a tubular reaction unit is cleared up to coal, including a plurality of pipeline units, a plurality of pipeline units connect gradually, the coaxial intercommunication of all pipeline units, tubular reaction unit is cleared up to coal is whole to be coiled at vertical orientation and rises soon, is around horizontal arranging in overlooking the orientation, is oval structure. The pipeline units comprise reaction main pipes and jacket pipes, the reaction main pipes of the adjacent pipeline units are connected, and the reaction main pipes are used for material reaction. The feed inlet of the coal digestion tubular reaction device is arranged on the reaction main pipe of the lowest pipeline unit, the discharge outlet is arranged on the reaction main pipe of the uppermost pipeline unit, reaction materials flow from bottom to top, the flow rate of the reaction materials is uniform and smooth, no air hammer is generated, scaling and blockage of the pipe wall are not easy to generate, the flowing uniformity of the reaction materials is ensured, and the controllability is strong.
The jacketed pipe is sleeved outside the reaction main pipe, the jacketed pipe is fixedly connected with the reaction main pipe, a cavity is formed between the reaction main pipe and the jacketed pipe, two openings are arranged on each jacketed pipe, one opening is a fluid inlet, the other opening is a fluid outlet, and the two openings are respectively arranged at the two ends of the jacketed pipe. The heat exchange medium flows in the cavity to exchange heat. The flow direction of the heat exchange medium is opposite to the flow direction of the reaction materials, and the heat exchange medium plays a role in heating, insulating or cooling the reaction materials. Specifically, the heat exchange medium enters from a fluid inlet on the jacketed pipe, flows through a cavity between the jacketed pipe and the reaction main pipe, performs countercurrent heat exchange with the reaction materials in the reaction main pipe, and then flows out from a fluid outlet.
The utility model provides a tubular reaction unit is cleared up to coal can realize the coal slurry uniform flow, avoids the pipe blockage, also can guarantee the operation of system serialization, reduces the field work volume, and in addition, the device also provides probably for enlarging the handling capacity. The device is applied to the technical research of ultrapure coal, and the produced ultrapure coal is used for preparing ultrapure combustion liquid which is used for replacing diesel oil to be used on a gas turbine and a low-speed diesel engine.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of a tubular reaction apparatus for coal digestion according to an embodiment of the present invention;
FIG. 2 is a top view of FIG. 1;
fig. 3 is a schematic structural view of the pipe unit in fig. 1.
The drawings are numbered as follows:
1-pipeline unit, 2-reaction main pipe, 3-jacket pipe, 4-agitator, 5-cavity, 6-fluid inlet, 7-fluid outlet, 8-closing section, 9-constant diameter section and 10-flaring section.
Detailed Description
The core of the utility model is to provide a tubular reaction unit is cleared up to coal, this tubular reaction unit is cleared up to coal can be continuous, steady operation, satisfies the super pure coal technique and enlargies and the experimental demand of industrialization.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 to 3, fig. 1 is a schematic view of a coal digestion tubular reaction apparatus according to an embodiment of the present invention; FIG. 2 is a top view of FIG. 1; fig. 3 is a schematic structural view of the pipe unit in fig. 1.
In a specific embodiment, the coal digestion tubular reaction device provided by the utility model comprises a plurality of groups of pipeline units 1 which are sequentially and coaxially communicated, the whole coal digestion tubular reaction device is coiled and ascended in the vertical direction, the horizontal surrounding arrangement is realized in the overlooking direction, the pipeline units 1 comprise reaction main pipes 2 used for reacting materials and jacket pipes 3 sleeved outside the reaction main pipes 2, the reaction main pipes 2 of adjacent pipeline units 1 are connected, a feed inlet is formed in the reaction main pipe 2 of the lowest pipeline unit 1, a discharge outlet is formed in the reaction main pipe 2 of the highest pipeline unit 1, the reaction materials flow from bottom to top, a cavity 5 is formed between the reaction main pipe 2 and the jacket pipes 3, each jacket pipe 3 is provided with a fluid inlet 6 and a fluid outlet 7, heat exchange media flow in the cavity 5, and the flow direction of the heat exchange media is opposite to the flow direction of the reaction materials.
In the structure, the coal digestion tubular reaction device comprises a plurality of pipeline units 1, the pipeline units 1 are sequentially connected, all the pipeline units 1 are coaxially communicated, the coal digestion tubular reaction device integrally rotates upwards in the vertical direction, and the coal digestion tubular reaction device is arranged around the horizontal direction in the overlooking direction and is of an oval structure. The pipeline units 1 comprise reaction main pipes 2 and jacket pipes 3, the reaction main pipes 2 of the adjacent pipeline units 1 are connected, and the reaction main pipes 2 are used for material reaction. The feed inlet of the coal digestion tubular reaction device is arranged on the reaction main pipe 2 of the lowest section of the pipeline unit 1, the discharge outlet is arranged on the reaction main pipe 2 of the highest section of the pipeline unit 1, reaction materials flow from bottom to top, the flow rate of the reaction materials is uniform and smooth, no air hammer is generated, scaling and blockage of the pipe wall are not easy to generate, the flowing uniformity of the reaction materials is ensured, and the controllability is strong.
The jacketed pipe 3 is sleeved outside the reaction main pipe 2, the jacketed pipe 3 is fixedly connected with the reaction main pipe 2, a cavity 5 is formed between the reaction main pipe 2 and the jacketed pipe 3, each jacketed pipe 3 is provided with two openings, one is a fluid inlet 6, the other is a fluid outlet 7, and the two openings are respectively arranged at two ends of the jacketed pipe 3. The heat exchange medium flows in the cavity 5 to exchange heat. The flow direction of the heat exchange medium is opposite to the flow direction of the reaction materials, and the heat exchange medium plays a role in heating, insulating or cooling the reaction materials. Specifically, the heat exchange medium enters from a fluid inlet 6 on the jacketed pipe 3, flows through a cavity 5 between the jacketed pipe 3 and the reaction main pipe 2, performs countercurrent heat exchange with the reaction materials in the reaction main pipe 2, and then flows out from a fluid outlet 7.
In addition, any part of the device can be detached, so that local pipeline blockage caused by improper operation can be conveniently treated, and system elements can be conveniently overhauled and replaced.
The utility model provides a tubular reaction unit is cleared up to coal can realize the coal slurry uniform flow, avoids the pipe blockage, also can guarantee the operation of system serialization, reduces the field work volume, and in addition, the device also provides probably for enlarging the handling capacity. The device is applied to the technical research of ultrapure coal, and the produced ultrapure coal is used for preparing ultrapure combustion liquid which is used for replacing diesel oil to be used on a gas turbine and a low-speed diesel engine.
On the basis of the above-mentioned specific embodiment, the reaction conditions of the coal digestion reaction are required to reach a constant temperature, so the piping unit 1 is divided into an elevated temperature region, a constant temperature region, and a cooled temperature region according to different temperature functions. According to the condition that the suspension property of the coal slurry gradually becomes better in the gradual heating reaction process, the length of the pipeline is reduced as much as possible under the conditions of considering flow rate, avoiding sedimentation and meeting the requirements of reaction conditions, and the investment is saved.
In order to reduce the length of the pipeline and save the investment cost, the diameter value of the spiral pipe of the reaction main pipe 2 in the temperature rising area is increased in a gradient mode, the spiral pipe diameter of the reaction main pipe 2 in the temperature rising area is increased in a gradient mode, the digestion reaction retention time is ensured, the length of the pipeline is shortened, and the temperature rising effect is also ensured.
The digestion reaction requires certain reaction temperature and reaction residence time, the reaction area in the tubular reaction device is located in a constant temperature area, the spiral pipe diameters of the reaction main pipe 2 in the constant temperature area and the cooling area are all maintained at constant values, and particularly the spiral pipe diameter of the constant temperature area is a fixed value, so that the requirements of the reaction temperature and the reaction residence time are met.
On the basis of the above-mentioned embodiments, the pipeline unit 1 further includes the perturber 4, the perturber 4 includes a closing section 8, a constant diameter section 9 and a flaring section 10, the closing section 8 is connected with the upper section reaction main pipe 2, the flaring section 10 is connected with the lower section reaction main pipe 2, and the constant diameter section 9 is connected with the closing section 8 and the flaring section 10.
All be equipped with perturbator 4 in every pipeline unit 1, connect and be responsible for between 2 in two sections reactions, guaranteed that the coal slurry is in the disturbance state all the time at the flow in-process, improved the local velocity of flow of reaction material, make the granule suspension that has the siltation tendency to the intensive mixing has guaranteed the even mobility of coal slurry in the pipeline, prevents to subside, avoids coal slurry pipeline deposit to block up, is favorable to the coal slurry to clear up going on in succession of reaction.
For a single pipeline unit 1, the pipe diameter of the reaction main pipe 2 in the pipeline unit 1 is a constant value, and the diameters of the front and rear ports are always equal. The reducing of the reaction main pipe 2 is realized by the pipe diameter change of the perturbator 4, the reducing part is generated on the perturbator 4, and the pipe diameters of the pipe orifices at the two ends of the perturbator 4 are equal to the pipe diameters of the reaction main pipes 2 which are respectively connected.
The diameters of the front and rear ports of the perturbator 4 of the constant temperature area and the cooling area are equal, and the pipeline reducing is not arranged, so that the constant temperature area is mainly ensured to stably flow, and the cooling area is not suitable for arranging the pipeline reducing due to the increase of the viscosity of the coal slurry caused by the temperature reduction.
Further optimizing the technical scheme, the maximum diameter of the closing-in section 8 of the perturber 4 in the heating area is always smaller than the maximum diameter of the expanding section 10, so that the coal slurry is disturbed in a proper amount while the gradient of the reaction main pipe 2 is increased in the heating process, and the pipeline deposition is avoided. The maximum diameter of the closing-in section 8 of the perturber 4 in the constant temperature area and the cooling temperature area is equal to the maximum diameter of the opening expanding section 10, thereby ensuring the fluidity and the constant speed of the coal slurry in the constant temperature area in which the digestion reaction occurs, keeping the reactant to be uniformly heated at a certain high temperature and having enough retention time.
In another more reliable embodiment, on the basis of any one of the above embodiments, all the reaction main pipes 2 exchange heat by providing a heat exchange environment through the cavity 5 between the jacket pipe 3 and the reaction main pipes 2, and the heat exchange medium may be one or a combination of several of steam, cooling water or heat transfer oil. Because the coal is various in types and the ash content and the ash composition of the same coal are different, the heat exchange system can provide a differentiated heat exchange design scheme according to the different coal digestion reaction conditions, and the main difference is embodied in the diameters of the reaction main pipes 2, the gradient pipe diameter distribution of the reaction main pipes 2, the distance between the reaction main pipes 2 and the jacket pipes 3, the lengths of the reaction main pipes 2, the lengths of all temperature areas and the like.
The general heat exchange thinking is as follows: the heating zone is heated by heat conducting oil and steam in a combined manner, the temperature is raised from the initial temperature to a first set temperature by using heat conducting oil for heat exchange, for example, 170 ℃, the heating zone consists of a plurality of sections of pipe diameters which are gradually increased, the specific quantity is determined according to specific conditions, and the steam is used for heating from 170 ℃ to the reaction temperature. The temperature is maintained in a constant temperature zone by steam. And performing combined cooling in a cooling zone through heat conducting oil and cooling water, wherein the reaction temperature is cooled by the heat conducting oil to a second set temperature, for example, the temperature is 100 ℃, and the temperature is cooled by the cooling water below 100 ℃.
When the reaction temperature requirement of the coal digestion tubular reaction device is high and the heat conduction oil cannot meet the requirement, steam can be used for heating in the temperature rising region at the same time, and the heat preservation is also carried out in the constant temperature region by adopting the steam, so that the temperature reduction region can only meet the requirement by adopting the heat conduction oil, and the temperature can be reduced in the temperature reduction region by using the cooling water at the same time.
Two media, namely industrial steam and cooling water, are simple and easily available in a factory, and are usually maintained uniformly in the factory without additionally configuring other equipment, and only a pipeline is laid. Therefore, the coal digestion tubular reaction device adopts a plurality of heat exchange medium combinations to be used in a temperature rising, constant temperature and cooling area simultaneously, thereby not only meeting all design temperature requirements of digestion reaction, but also being beneficial to saving energy and reducing consumption and reducing heat exchange cost and workload.
Further optimize above-mentioned technical scheme, the pipe diameter length of each temperature functional area is calculated by the heat transfer rate of design and this district dwell time and is obtained. All the heat exchange media flow in the cavity 5 in the opposite direction to the reaction materials, and are all countercurrent heat exchange. The connection modes of the heat exchange cavities 5 of different heat exchange media are also different.
The heat conducting oil is connected between the cavities 5 of the adjacent pipeline units 1 through pipelines, and each jacketed pipe 3 is communicated with the adjacent jacketed pipe 3. The heat conducting oil circularly flows between the temperature rising area and the temperature reducing area, the heat conducting oil flows into the pipeline unit 1 of the temperature rising area after absorbing heat in the temperature reducing area, the heat conducting oil flows into the pipeline unit 1 of the temperature reducing area after emitting heat in the temperature rising area, and the heat conducting oil flows between the temperature rising area and the temperature reducing area and complies with the law of energy conservation. The heat conduction oil does not need a heat conduction oil heating system and is only used for heat transfer between the pipeline units 1, the heat conduction oil can stably exchange heat between the cooling area and the heating area through reasonable temperature design, the heat conduction oil absorbs heat in the cooling area and is just used for heating the reaction main pipe 2 in the heating area, the temperature of the heat conduction oil out of the heating area is just used for cooling the reaction main pipe 2 in the cooling area, the heat conduction oil is recycled in the tubular reactor, a heat conduction oil heating system is abandoned, tedious maintenance is avoided, heat exchange cost is reduced, and energy conservation and consumption reduction are realized.
Further optimizing the above technical scheme, the cooling water is connected between the cavities 5 of the adjacent pipeline units 1 through pipelines, the fluid inlet 6 of the initial pipeline unit 1 is connected with the cooling water pipe network, and the fluid outlet 7 of the tail end pipeline unit 1 is connected with the cooling water pipe network, so that the constancy of the temperature of the cooling zone is ensured.
Further optimize above-mentioned technical scheme, steam all links to each other with steam pipe network and condensate water pipe network at every pipe unit 1, and the fluid entry 6 and the steam pipe network of every pipe unit 1 are connected, and fluid export 7 is connected with the condensate water pipe network, has guaranteed the constancy of high temperature district's temperature like this.
For the coal digestion tubular reaction device in each embodiment, the production control can be realized by combining manual control and automatic control. Before the system is normally opened, manual control is adopted. The material flow in the tubular reaction unit system is cleared up to the coal, material pressure, steam flow and pressure, heat conduction oil flow, cooling water flow in the reaction main pipe 2 have been adjusted when trying to produce, just later are in normally open state, generally need not change. A coal digestion tubular reaction device system is provided with a set of PLC, and the flow, pressure and temperature data of all nodes are displayed on a computer interface, so that the centralized control is facilitated. Specifically, a feed inlet, a discharge outlet and an outer discharge pipeline of the coal digestion tubular reaction device are provided with pneumatic regulating valves so as to open and close material inlet and outlet and finely adjust the material pressure of the pipeline. The steam branch pipe is provided with a pneumatic regulating valve to open and cut off the steam supply and finely adjust the steam flow. The centrifugal pump is provided with a variable frequency motor, and the rotating speed of the centrifugal pump is adjusted by adjusting the frequency of the variable frequency motor through a computer, so that the aim of adjusting the total flow and pressure of the circulating heat-conducting oil and the cooling water is fulfilled. Compared with the traditional digestion reactor adopting intermittent operation, the reactor has the advantages of convenient control, realization of continuous production, saving of a large amount of workload and realization of automatic continuous operation.
For example, the scale of the coal digestion tubular reaction device is 30000 tons of ultra-pure coal produced every year, and the coal, the alkali liquor and a certain amount of water are prepared into alkaline coal slurry which is sent into the coal digestion reactor through a high-pressure coal slurry pump. The alkaline coal slurry flows in the pipeline, sequentially passes through an heating area, a constant temperature area and a cooling area, is completely reacted in the tubular reactor, is discharged through a pipeline outlet step-by-step pressure reduction valve, and enters the next procedure.
The heating area of the coal digestion tubular reaction device consists of heat conduction oil and steam, the constant temperature area provides heat by the steam, and the cooling area consists of the heat conduction oil and cooling water. The reaction main pipe 2 of the temperature rising zone adopts a gradient increasing mode, and the specific pipe diameter, temperature rising/falling speed and pipe length of the reaction main pipe 2 are shown in table 1.
TABLE 1 Heat exchange conditions of pipelines and combined heat exchange in each heat exchange functional area
The superheated steam with the steam of 3.8Mpa and the temperature of 430 ℃ is reduced to 3.38Mpa and the superheated steam with the steam of 250 ℃ is sent into a boundary region for use. The heat conducting oil is recycled in the system, the temperature of the heat conducting oil is reduced by adopting the circulating heat conducting oil at the temperature reduction region of 240-100 ℃, the temperature of the heat conducting oil after absorbing heat is increased to about 220 ℃, and the heat conducting oil is recycled to the low-temperature heating pipe section for countercurrent heating. The combination mode has better effect than that of only using heat conducting oil or steam alone. The comparison of the heat exchange mode and effect of the heating zone is shown in Table 2.
TABLE 2 comparison of heat exchange modes of heating zones
The coal digestion tubular reaction device achieves the following performances: ultra-pure coal production capacity: 30000 ton/year; operating temperature: 240 ℃; operating pressure: 3.72 MPa.
The coal slurry of the coal digestion tubular reaction device flows uniformly, no pipeline blockage phenomenon occurs in the normal operation process, the whole device runs continuously, the field inspection and inspection workload is reduced, and the device can better perform
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The above is to the utility model provides a tubular reaction unit is cleared up to coal introduces in detail. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a tubular reaction unit is cleared up to coal, its characterized in that includes multiunit pipeline unit (1) of coaxial intercommunication in proper order, tubular reaction unit is cleared up to coal is whole to be coiled spiral rising on vertical direction, is around horizontal arrangement on overlooking the direction, pipeline unit (1) is responsible for (2) and suit in the reaction of being responsible for (2) outside clamp sleeve pipe (3) including the reaction that is used for the material to react, and is adjacent the reaction of pipeline unit (1) is responsible for (2) and is connected, and the feed inlet sets up on the reaction of the pipeline unit (1) of the lower section is responsible for (2), and the discharge gate sets up on the reaction of the pipeline unit (1) of the upper section is responsible for (2), and the reaction material flows from bottom to top, reaction is responsible for (2) and form cavity (5) between clamp sleeve pipe (3), every clamp sleeve pipe (3) are gone up and have fluid inlet (6) and fluid outlet, the heat exchange medium flows in the cavity (5), and the flow direction of the heat exchange medium is opposite to the flow direction of the reaction materials.
2. The coal digestion pipe type reaction device according to the claim 1, characterized in that the pipeline unit (1) is divided into an elevated temperature zone, a constant temperature zone and a cooling temperature zone according to different temperatures, the spiral pipe diameter of the reaction main pipe (2) in the elevated temperature zone is increased in a gradient way, and the spiral pipe diameters of the reaction main pipe (2) in the constant temperature zone and the cooling temperature zone are maintained at constant values.
3. The coal digestion pipe type reaction device according to claim 2, wherein the pipeline unit (1) further comprises a disturber (4) connected between the two sections of the reaction main pipes (2), the diameters of the front and rear ports of the reaction main pipes (2) in the pipeline unit (1) are always equal, and the diameter-variable part in the pipeline unit (1) is arranged on the disturber (4).
4. The coal digestion pipe type reaction device according to claim 3, wherein the agitator (4) includes a closed section (8) connected with the upper reaction main pipe (2), an expanded section (10) connected with the lower reaction main pipe (2), and a constant diameter section (9) connecting the closed section (8) and the expanded section (10).
5. The coal digestion tube reaction device according to the claim 4, characterized in that the maximum diameter of the closing section (8) of the disturber (4) in the temperature rising zone is always smaller than the maximum diameter of the flaring section (10); the maximum diameter of the closing section (8) of the perturber (4) in the constant temperature area and the cooling area is equal to the maximum diameter of the flaring section (10).
6. The tubular reaction device for coal digestion according to claim 2, characterized in that heating is performed by heat conducting oil and steam in the temperature rising region, heat preservation is performed by steam in the constant temperature region, and cooling is performed by heat conducting oil and cooling water in the temperature lowering region.
7. The coal digestion tube type reaction device according to claim 6, wherein the heat transfer oil is connected between the cavities (5) of the adjacent pipe units (1) through a pipe, and the heat transfer oil circulates between the heating area and the cooling area.
8. The coal digestion pipe reactor according to claim 6, characterized in that the cooling water is piped between the cavities (5) of adjacent pipe units (1), the fluid inlet (6) of the initial pipe unit (1) being connected to a cooling water pipe network and the fluid outlet (7) of the final pipe unit (1) being connected to the cooling water pipe network.
9. The coal tubular reactor apparatus according to claim 6, characterized in that the steam is connected with a steam pipe network at the fluid inlet (6) of each pipe unit (1), and the fluid outlet (7) is connected with a condensed water pipe network.
10. The coal digestion tubular reaction device according to any one of claims 6 to 9, wherein pneumatic adjusting valves are arranged on a feeding port, a discharging port, an external discharge pipeline and a steam branch pipe of the coal digestion tubular reaction device, centrifugal pumps are arranged on a heat transfer oil branch pipe and a cooling water branch pipe, the centrifugal pumps are connected with a variable frequency motor, and the pneumatic adjusting valves and the variable frequency motor are connected with a controller.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921368168.2U CN210496446U (en) | 2019-08-21 | 2019-08-21 | Tubular reaction unit is cleared up to coal |
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| CN201921368168.2U CN210496446U (en) | 2019-08-21 | 2019-08-21 | Tubular reaction unit is cleared up to coal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110394143A (en) * | 2019-08-21 | 2019-11-01 | 兖州煤业股份有限公司 | A kind of coal resolution tubular type reaction unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110394143A (en) * | 2019-08-21 | 2019-11-01 | 兖州煤业股份有限公司 | A kind of coal resolution tubular type reaction unit |
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Address after: 273500 No. 949, Fushan South Road, Zoucheng City, Jining City, Shandong Province Patentee after: Yankuang Energy Group Co.,Ltd. Country or region after: China Patentee after: YANKUANG COAL WATER SLURRY GASIFICATION AND COAL CHEMICAL INDUSTRY NATIONAL ENGINEERING RESEARCH CENTER CO.,LTD. Patentee after: SHANDONG ENERGY GROUP Co.,Ltd. Address before: 273599 No. 298, Fushan South Road, Zoucheng, Jining, Shandong Patentee before: YANZHOU COAL MINING Co.,Ltd. Country or region before: China Patentee before: YANKUANG COAL WATER SLURRY GASIFICATION AND COAL CHEMICAL INDUSTRY NATIONAL ENGINEERING RESEARCH CENTER CO.,LTD. Patentee before: YANKUANG GROUP Co.,Ltd. |