CN214495743U - Device of semi coke for preparation of calcium carbide raw materials - Google Patents

Abstract

The application discloses preparation carbide raw materials is with device of blue charcoal belongs to industry and gives up admittedly, the useless processing technology field of danger, can solve prior art and carry out the problem of effective processing to tar sediment. The device comprises an edge runner mill, a ball press, a dryer and a carbonization furnace; the edge runner mill is used for mixing the input tar residues with the pulverized coal to obtain a mixture; an input port of a bin of the ball press is communicated with an output port of the edge runner mill, and the ball press is used for extruding and forming the mixture input by the edge runner mill to obtain formed pellets; the dryer is used for drying the placed molded pellets to obtain dried pellets; the carbonization furnace is used for carbonizing the placed dry pellets or carbonizing the placed dry pellets and lump coal to obtain the semi coke. Use the device of this application can turn into blue charcoal with the tar sediment, and do not have the by-product, realized the effective processing of tar sediment.

Description

Device of semi coke for preparation of calcium carbide raw materials

Technical Field

The application relates to the technical field of industrial solid waste and hazardous waste treatment, in particular to a device for preparing semi-coke for an acetylene raw material.

Background

At present, a sticky solid residue is generated in coal pyrolysis production processes such as coking, fixed bed coal gasification, low-rank coal quality separation and the like, and the solid residue is tar residues. Specifically, under the pyrolysis condition, weak covalent bonds in a coal macromolecular structure are uniformly cracked to form micromolecular free radicals which enter a gas phase, and the free radicals further react to form products which are mixed and condensed with mineral matters, coal tar particles and the like carried in the gas phase to form coarse dust-containing tar. And (4) settling the crude tar, performing oil-water separation and the like, and obtaining the residue in the extracted coal tar, namely the tar residue. In the coking and the production process utilizing the low-rank coal quality separation, the crude tar is used as an important product and a profit source and must be recycled and extracted. In the production process of fixed bed coal gasification, in order to avoid influencing the subsequent reaction, impurities such as dust, coal tar and the like carried in the synthesis gas must be removed, and tar residues are formed by the removed products. Therefore, the production of tar residues cannot be avoided in the production process of the coal chemical industry.

The tar residue is rich in S, N, halogen and other heteroatom compounds, is mixed with a large amount of polycyclic aromatic hydrocarbon, heavy metal, inorganic salt and other harmful substances, is listed in the national hazardous waste record, and belongs to industrial hazardous waste. The tar residues have large yield and wide distribution, and cause great harm to the environment due to improper disposal. The prior art can not effectively treat tar residues, so that enterprises can not meet the requirements of low-carbon and green production, and the development of the coal chemical industry is greatly restricted by the problems caused by the tar residues, so that the seeking of a reasonable treatment mode of the tar residues becomes the most urgent industry requirement at present.

Disclosure of Invention

The embodiment of the application can solve the problem that the prior art can not effectively treat tar slag by providing the device for preparing the semi-coke for the calcium carbide raw material.

The embodiment of the utility model provides a device for preparing semi-coke for an acetylene raw material, which comprises an edge runner mill, a ball press, a dryer and a carbonization furnace; the edge runner mill is used for mixing the input tar residues with the pulverized coal to obtain a mixture; an input port of a bin of the ball press is communicated with an output port of the edge runner mill, and the ball press is used for extruding and forming the mixture input by the edge runner mill to obtain formed pellets; the dryer is used for drying the placed molded pellets to obtain dried pellets; the carbonization furnace is used for carbonizing the placed dry pellets or carbonizing the placed dry pellets and lump coal to obtain the semi coke.

In a possible implementation manner, the device for preparing the semi-coke for the calcium carbide raw material further comprises a storage bin, wherein the storage bin is used for storing tar residues; the output port of the storage bin is communicated with the edge runner mill.

In one possible implementation mode, a jacket is sleeved on the outer wall of a bin hopper of the storage bin; a spacing distance is reserved between the inner wall of the jacket and the outer wall of the hopper to form an annular cavity; the tail gas outlet of the carbonization furnace is communicated with the annular cavity.

In a possible implementation mode, the device for preparing the semi-coke for the calcium carbide raw material further comprises a belt conveyor, wherein the input end of the belt conveyor is communicated with the output port of the edge runner mill, and the output end of the belt conveyor is communicated with the input port of the bin of the ball press machine, so that a mixed material mixed by the edge runner mill is input into the ball press machine.

In a possible implementation manner, the device for preparing semi-coke for calcium carbide raw materials further comprises a spiral conveyor, wherein the input end of the spiral conveyor is communicated with the output port of the dryer, and the output end of the spiral conveyor is communicated with the input port of the carbonization furnace and is used for inputting the dried pellets dried by the dryer into the carbonization furnace.

In one possible implementation mode, the device for preparing the semi-coke for the calcium carbide raw material further comprises a belt metering scale and a weighing and metering bin; the output end of the belt scale is connected with the input port of the edge runner mill and is used for quantitatively inputting the pulverized coal into the edge runner mill; the output end of the weighing and metering bin is communicated with the input port of the edge runner mill and is used for quantitatively inputting the tar residues into the edge runner mill.

The embodiment of the utility model provides an in one or more technical scheme, following technological effect or advantage have at least:

the embodiment of the utility model provides a pair of preparation for carbide raw materials device mixes the tar sediment of input and powdered coal through the edge runner mill and obtains the mixture. And the input port of the bin of the ball press is communicated with the output port of the edge runner mill, and the mixture input by the edge runner mill is extruded and molded to obtain the molded pellets. And drying the placed formed pellets by a dryer to obtain the dried pellets. And carbonizing the placed dry pellets by the carbonization furnace, or carbonizing the placed dry pellets and lump coal to finally obtain the semi coke. The semi-coke can be used as a calcium carbide raw material for recycling. The tar residue is completely converted into semi-coke without by-products, so that the tar residue is effectively treated, and enterprises meet the requirements of low-carbon and green production.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are 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 structural diagram of an apparatus for preparing semi-coke for a calcium carbide raw material according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a storage bin according to an embodiment of the present application.

Icon: 1-tar residue; 2-storage of the bin; 3-a jacket; 4-ring cavity; 5-pulverized coal; 6-weighing by a belt conveyor; 7-weighing and metering bin; 8-an edge runner mill; 9-a belt conveyor; 10-ball press machine; 11-a dryer; 12-a screw conveyor; 13-carbonization furnace.

Detailed Description

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 some, but not all, embodiments of the present invention. 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.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1, an embodiment of the present invention provides an apparatus for preparing semi coke for an acetylene raw material, including an edge runner mill 8, a ball press 10, a dryer 11, and a carbonization furnace 13. The edge runner mill 8 is used for mixing the input tar residue 1 and the pulverized coal 5 to obtain a mixture. An input port of a bin of the ball press 10 is communicated with an output port of the edge runner mill 8 and is used for extruding and forming the mixture input by the edge runner mill 8 to obtain the formed pellets. The dryer 11 is used for drying the placed molded pellets to obtain dried pellets. The carbonization furnace 13 is used for carbonizing the placed dry pellets, or carbonizing the placed dry pellets and lump coal to obtain semi coke. The semi-coke can be used as a calcium carbide raw material for recycling. By completely converting the tar residue 1 into semi coke without by-products, the tar residue 1 is effectively treated, and enterprises meet the requirements of low-carbon and green production. The embodiment of the utility model provides a preparation blue charcoal is prepared with device of blue charcoal to preparation carbide raw materials, the tar sediment 1 that has solved the coal coking production in-process and the 5 utilization's of powdered coal problem, the environmental pollution problem that tar sediment 1 caused has still been solved, and the expense of danger waste disposal has been reduced, and the shaping pelletizing intensity after tar sediment 1 and the 5 shaping of powdered coal is higher, can satisfy the requirement of blue charcoal production, the blue charcoal of production can satisfy the requirement of carbide production.

Wherein, the edge runner mill 8 is a device for crushing or mixing materials, which is formed by taking a roller and a mill base as main working components, and the edge runner mill 8 has good stirring effect, uniform stirring and simple operation. Because the tar residue 1 has larger viscosity and is not easy to disperse, the tar residue 1 and the pulverized coal 5 are input into the edge runner mill 8, and the tar residue 1 and the pulverized coal 5 can be fully contacted and uniformly mixed by utilizing the extrusion stirring function of the edge runner mill 8.

In practice, in the coal pyrolysis production processes of coking, fixed bed coal gasification, low-rank coal quality separation and the like, weak covalent bonds in a coal macromolecular structure are uniformly cracked to form small-molecule free radicals which enter a gas phase, and the free radicals further react to form products and are mixed with mineral substances, coal tar particles and the like carried in the gas phase to be condensed to form coarse dust-containing tar. And (3) carrying out treatment steps of sedimentation, oil-water separation and the like on the crude tar, wherein the remainder in the extracted coal tar can generate a sticky solid residue, namely the tar residue 1. The pulverized coal 5 includes pulverized coal particles having smaller particles, and the like.

The method for mixing the tar residue 1 and the pulverized coal 5 to obtain the mixture specifically comprises the following steps: the tar residue 1 and the pulverized coal 5 are mixed according to the proportion of 20-50 wt% and 50-80 wt% respectively to obtain a mixture.

When the tar slag 1 accounts for less than 20wt%, the tar slag 1 cannot be in full contact with the surfaces of the particles of the pulverized coal 5, the interparticle bonding force of the dried pellets is weak, and the dried pellets can generate microcracks, so that the strength of the dried pellets is low. In the carbonization process of the dry pellets, with the increase of the carbonization temperature, tar in the tar residue 1 begins to volatilize, pore channels are formed among the 5 particles of the pulverized coal, the bonding force in the dry pellets is further reduced, colloid is separated out from the 5 particles of the pulverized coal after a certain temperature is reached, but the colloid cannot be bonded due to large particle gaps, and finally granular carbonized powder is formed instead of semi coke.

When the tar residue 1 accounts for more than 50wt%, the forming pressure during extrusion forming enables the particles to be densely filled with tar, and light tar and water can not be effectively volatilized during drying of the dried pellets, so that the phenomenon of low strength is caused. During carbonization of the dried pellets, tar volatilization is intensified along with the rise of temperature, shrinkage of the dried pellets is increased, and due to the fact that the mixing amount of tar residues 1 is high, the content of the pulverized coal 5 in the dried pellets is low, the pulverized coal 5 in the dried pellets is not uniformly distributed, stress difference is caused during shrinkage of the dried pellets, and semi coke obtained after carbonization has large cracks.

Correspondingly, the change of the proportion of the tar residue 1 can affect the change of the proportion of the pulverized coal 5, and when the proportion of the tar residue 1 is 20wt%, the proportion of the pulverized coal 5 is 80%; when the tar residue 1 accounts for 35wt%, the pulverized coal 5 accounts for 65 wt%; when the proportion of the tar residue 1 is 50wt%, the proportion of the powdered coal 5 is 50wt%, and so on.

In practical application, the water content of the pulverized coal 5 is 4-15 wt%. If the water content of the pulverized coal 5 is less than 4wt%, the molding of the mixture in the subsequent process is not facilitated, and the molded pellets are easy to crack. If the water content of the pulverized coal 5 is more than 15wt%, a large amount of water is extruded once the mixture is extruded to obtain a molded pellet, and local environment pollution is caused.

The particle size distribution of the pulverized coal 5 is as follows: the proportion of the particle size of 1 mm-5 mm is 20wt% -60 wt%, and the proportion of the particle size of less than 1mm is 40wt% -80 wt%.

Wherein, the particle size distribution is the number of each level of particle size in the bulk material composed of different particle sizes, and is usually expressed by the percentage of the total amount. Reasonable particle size distribution is an important way to achieve low porosity in the furnish.

Correspondingly, the change of the proportion of the pulverized coal 5 with the particle size of 1 mm-5 mm can affect the change of the proportion of the pulverized coal 5 with the particle size of less than 1mm, and when the proportion of the pulverized coal 5 with the particle size of 1 mm-5 mm is 20wt%, the proportion of the pulverized coal 5 is 80%; when the proportion of the pulverized coal 5 with the particle size of 1 mm-5 mm is 40wt%, the proportion of the pulverized coal 5 is 60 wt%; when the proportion of the pulverized coal 5 with the particle size of 1 mm-5 mm is 60wt%, the proportion of the pulverized coal 5 is 40wt%, and so on.

In the actual production process, the pulverized coal 5 with the particle size smaller than 1mm is easier to flow in the pressing process, so that the formed pellets obtained by extrusion molding are more compactly filled among particles, the void ratio is reduced, and the strength of the dried pellets after drying can be improved. When the gaps of the formed pellets are completely filled, the effect of increasing the powdered coal 5 with the particle size smaller than 1mm on improving the strength of the dried pellets is no longer obvious, namely when the powdered coal 5 with the particle size smaller than 1mm exceeds a certain amount, the effect of increasing the powdered coal 5 with the particle size smaller than 1mm on improving the strength of the dried pellets is not large, and in practice, when the mixing amount of the powdered coal 5 with the particle size smaller than 1mm exceeds 80%, the strength of the dried pellets is not obviously changed after the dried pellets are dried. The powder coal 5 smaller than 1mm has great flying loss and is more difficult to obtain, so that the production cost is increased, the environment is polluted due to flying, and the health of operators is not facilitated. Therefore, the proportion of the pulverized coal 5 with the particle size of 1 mm-5 mm is 20wt% -60 wt%, the proportion of the pulverized coal 5 with the particle size of less than 1mm is 40wt% -80 wt%, and the obtained dry pellets have good strength, reduce the production cost and protect the environment and the health of operators.

In the actual production process, because the volume shrinkage of the pulverized coal 5 with different particle sizes is different in the carbonization process, when the particle sizes of the pulverized coal 5 in the same dry pellet are different greatly, cracks caused by the volume shrinkage in the carbonization process are increased. Cracks among the granular coal 5 particles of the semi-coke obtained after final carbonization are increased. Therefore, in practical application, when the proportion of the pulverized coal 5 with the particle size of 1 mm-5 mm is 50wt%, and the proportion of the pulverized coal 5 with the particle size of less than 1mm is 50wt%, the semi coke with better quality can be obtained.

Optionally, a binder may be generally mixed in the mixture. During the specific production operation, the tar residue 1, the pulverized coal 5 and the binder can be simultaneously added into the edge runner mill 8 to be mixed to obtain a mixture, or the tar residue 1 and the pulverized coal 5 can be mixed and then added with the binder to be mixed to obtain the mixture.

The addition of the binder can promote the precipitation amount of the colloid in the carbonization process of the pulverized coal 5 and increase the amount of the colloid, thereby improving the strength of the obtained semi-coke.

Optionally, the binder may be binder a, depending on the nature of the pulverized coal 5, the particle size, the water content and the quality of the tar residue 1. The adhesive A has good adhesion effect, thereby being beneficial to improving the strength of the obtained semi-coke. Meanwhile, the cost of the adhesive A is low, and the production cost can be reduced.

Wherein the adhesive accounts for 0.1-10.0% of the total mass of the tar residue 1 and the pulverized coal 5. When the binder accounts for less than 0.1% of the total mass of the tar residue 1 and the pulverized coal 5, the expected effect of the binder on the binding of the tar residue 1 and the pulverized coal 5 cannot be achieved, and when the binder accounts for more than 10.0% of the total mass of the tar residue 1 and the pulverized coal 5, the increase of the expected effect on the binding of the tar residue 1 and the pulverized coal 5 is not obvious any more, and the production cost is increased by continuously increasing the content of the binder. Therefore, the adhesive accounts for 0.1-10.0% of the total mass of the tar residue 1 and the pulverized coal 5, the better adhesion effect on the tar residue 1 and the pulverized coal 5 can be achieved, and the production cost is also in a reasonable range.

In practical application, after the screen residue of the coal fed into the carbonization furnace 13 is screened by the vibrating screen, the obtained screen residue is used as the pulverized coal 5.

The coal as fired is coal containing full moisture entering a coal bunker of a boiler room. The screen residue is a term for measuring particles, i.e. large-particle substances which are left on the screen surface after being screened by a vibrating screen and have larger diameters than the screen holes. The screen residue refers to the particulate matter below the screen surface of the vibrating screen which is smaller than the diameter of the screen hole after being screened by the vibrating screen. The aperture of the vibrating screen can be selected according to the requirements of the skilled person in the field in practical use, for example, the vibrating screen with the aperture of 5mm can be selected.

For example, the screen residue of the coal charged into the carbonization furnace 13 is taken, the screen residue is screened by a vibrating screen with the aperture of 5mm, and the screened screen residue is taken as the raw material of the pulverized coal 5.

The ball press 10 is mainly used for pressing powdery materials which are difficult to form, such as pressed coal powder, and has the advantages of large forming pressure, good forming effect, high balling rate, low power consumption, compact structure and convenient maintenance and debugging. The ball press machine 10 is of various types, and the proper ball press machine 10 is selected according to the requirement. In order to be suitable for manufacturing semi-coke, the ball press 10 ensures that the pressure meets the requirement of 5 MPa-25 MPa, the pre-pressing system meets the feeding requirement, and the long half shaft of the pressing roller ball socket is 30mm long and the short half shaft of the pressing roller ball socket is 20mm long, so that the formed ball after balling is easy to drop off the roller, and the drying time is short.

And the extrusion pressure of the mixture during extrusion forming to obtain the formed pellets is 5-15 MPa. When the extrusion pressure is less than 5MPa, the formed pellets are loose and are easy to break; when the extrusion pressure is more than 15MPa, the formed pellets are easy to crack or generate cracks, so that the strength of the dried pellets after subsequent drying or carbonized semi-coke is reduced.

The dryer 11 is a drying grate. The drying machine is a caterpillar heat transfer device, and in the process of pellet production technology, the drying machine undertakes the procedures of drying and preheating. The size of the chain grate type dryer is different according to the process design, and the length of the larger chain grate type dryer can reach 100 m. During specific work, molded pellets uniformly distributed on a grate bed at the tail part of the drying machine sequentially pass through four process sections, namely an air blowing drying section, an air exhausting drying section, a preheating I section and a preheating II section, and different temperature gases discharged by the rotary kiln and the circular cooler vertically pass through a material layer of the drying machine to heat the molded pellets, so that the processes of dehydration, preheating and oxidation are completed, and the preheated molded pellets enter the rotary kiln to be continuously roasted under the shoveling plate of a machine head.

In actual production, the drying temperature adopted when drying the molded pellets to obtain dried pellets is 100-250 ℃, and the drying time is 60-120 min. The drying temperature is less than 100 ℃, longer drying time is needed, the production efficiency is influenced, and the molded pellets are easy to break due to overlong standing time of the molded pellets because the molded pellets contain water. Because the drying process is an aerobic process, the drying temperature is higher than 250 ℃, and the pellets are easy to self-ignite in the later period of drying.

The drying for 60-120 min by adopting the drying grate dryer at the temperature of 100-250 ℃ can effectively reduce the breakage rate in the drying process of the molded pellets and can keep higher productivity. In the actual production process, the drying time is controlled by adjusting the grate speed of the chain grate type dryer until the strength of dried pellets reaches more than 3MPa after drying.

Of course, the drying process can also be carried out by the residual heat of the carbonization furnace 13, thereby effectively reducing the energy consumption and saving the resources.

The carbonization furnace 13 is a device for carbonizing the charged material. Carbonization, also known as dry distillation and coking, refers to the reaction process of heating and decomposing dry pellets under the condition of air isolation. The dried pellets are generally carbonized in a carbonization furnace 13, or the dried pellets are mixed with lump coal and carbonized to obtain semi coke.

In practice, only the dried pellets can be carbonized to obtain semi-coke, and the semi-coke can meet the strength requirement of the semi-coke for the calcium carbide raw material. Because the tar slag 1 for preparing the dry pellets is from industrial production waste, the yield of the dry pellets is limited, the dry pellets and lump coal do not react with each other in the carbonization process, so that the dry pellets and the lump coal can be mixed and carbonized to obtain more semi-coke for the calcium carbide raw material, and the semi-coke has better quality.

Wherein, mix dry pellet and lump coal and carry out the carbonization, specifically include: mixing the dry pellets in a proportion of 10-30 wt% and the lump coal in a proportion of 70-90 wt%, and carbonizing to obtain semi-coke with a strength greater than 5MPa, so that the requirement of the calcium carbide raw material on the semi-coke strength is met.

In practical application, the carbonization conditions are as follows: isolating air; the carbonization temperature is 500-800 ℃; the carbonization time is 30-120 min.

In the actual production process, because tar sediment 1 is sticky form material, for the convenience of storing, as shown in fig. 1 and fig. 2, the utility model discloses the device of embodiment is still including storing storehouse 2, stores storehouse 2 and is used for storing tar sediment 1. The output of the storage bin 2 is in communication with an edge runner mill 8. In particular, the storage silo 2 may be a tar residue dosing silo.

Because the viscidity of tar sediment 1 leads to its easy adhesion in the inner wall of storing storehouse 2, in order to avoid the problem that tar sediment 1 adhesion leads to being difficult for carrying on the inner wall of storing storehouse 2, the embodiment of the utility model provides a device, as shown in fig. 2, the outer wall cover of the storehouse fill of storing storehouse 2 is equipped with and presss from both sides cover 3.

Wherein, the jacket 3 is that an outer sleeve is added outside the outer wall of the storage bin 2. Heating media such as steam, hot water or hot gas are introduced into the inner shell of the jacket 3 to heat or insulate the materials in the storage bin 2.

The inner wall of the jacket 3 is spaced from the outer wall of the hopper to form an annular chamber 4. A person skilled in the art can set the size of the spacing distance according to actual requirements, such as 9 cm-11 cm. The tail gas delivery outlet of retort 13 passes through the pipeline intercommunication with ring chamber 4 to can be with the heat input ring chamber 4 of this tail gas, with the mobile state of guaranteeing 1 temperature of tar sediment more than 60 ℃, thereby prevented 1 adhesion of tar sediment in the inner wall of storing storehouse 2. And make the tar residue 1 keep flowable state through the tail gas that utilizes the retort 13, can the energy saving, and in actual manufacturing procedure, the heat energy that provides of this tail gas is just moreover, does not need extra heat energy of interpolation again, makes device and corresponding preparation technology simpler.

Because the mixture viscidity of intensive mixing is low to the device of this application still includes band conveyer 9, as shown in fig. 1, band conveyer 9's input and collergang 8's delivery outlet intercommunication, band conveyer 9's output and the input port intercommunication of ball press 10's feed bin for the mixture input ball press 10 with collergang 8 mixes, thereby made things convenient for the transportation of mixture, improved production efficiency.

Continuing to refer to fig. 1, the utility model discloses the device of embodiment still includes screw conveyer 12, and screw conveyer 12's input and drying-machine 11's delivery outlet intercommunication, screw conveyer 12's output and retort 13's input port intercommunication for with the dry pellet input retort 13 of drying-machine 11 drying, thereby made things convenient for the transportation of dry pellet, improved production efficiency.

The device of the embodiment of the utility model, as shown in figure 1, still include belt measurement scale 6 and weighing and metering storehouse 7. The output end of the belt scale 6 is connected with the input port of the edge runner mill 8 and is used for inputting the pulverized coal 5 into the edge runner mill 8 according to the amount. The output end of the weighing and metering bin 7 is communicated with the input port of the edge runner mill 8 and is used for inputting the tar residues 1 into the edge runner mill 8 according to the amount. The pulverized coal 5 is added to the edge runner mill 8 through the belt scale 6, the tar residue 1 is added to the edge runner mill 8 through the weighing and metering bin 7, and the reasonable proportion of the pulverized coal 5 and the tar residue 1 is ensured.

The method has the advantages of low investment cost and simple process, simultaneously solves the problem of small particle powdered coal 5 obtained after the coal as fired of the carbonization furnace 13 is screened, and saves the production cost. According to the method, the semi-coke for the calcium carbide raw material meeting the index is prepared while hazardous waste is treated, the economic value is created, and the production cost is saved. The method solves the problem that in the process of blending the tar residue 1 into the coke oven in the industry at present, planar or fine particles are generated to cause more fine particles in the coking product.

The utility model provides the following concrete embodiment

Example one

Adding tar residue 1 into an edge runner mill 8 by using a weighing and metering bin 7, adding pulverized coal 5 with the water content of 12wt% into the edge runner mill 8 by using a belt weighing scale 6, wherein the proportion of the tar residue 1 is 40wt%, the proportion of the pulverized coal 5 is 60wt%, and the grain composition is as follows: 30wt% of pulverized coal 5 with particle size of 1 mm-5 mm, and 70wt% of pulverized coal 5 with particle size less than 1 mm. Mixing and stirring for 10min by using a wheel mill 8, conveying the mixed mixture from the wheel mill 8 to a ball press 10 by using a belt conveyor 9, then carrying out extrusion forming on the mixture by using the ball press 10, carrying out extrusion pressure of 15MPa, drying the formed pellets by using a grate dryer, wherein the drying temperature is 200 ℃, the drying time is 90min, conveying the dried pellets into a carbonization furnace 13 by using a screw conveyor 12, and carbonizing the dried pellets in the carbonization furnace 13 at 800 ℃ for 30min by insulating air to obtain semi-coke, wherein the strength of the semi-coke is 5.3MPa, and the requirement of calcium carbide raw materials on the strength of the semi-coke is met.

Example two

Adding tar residue 1 into an edge runner mill 8 by using a weighing and metering bin 7, adding pulverized coal 5 with the water content of 6wt% into the edge runner mill 8 by using a belt weighing scale 6, wherein the proportion of the tar residue 1 is 35wt%, the proportion of the pulverized coal 5 is 65wt%, and the grain composition is as follows: 40wt% of pulverized coal 5 with particle size of 1 mm-5 mm, and 60wt% of pulverized coal 5 with particle size less than 1 mm. Mixing and stirring for 15min by using a wheel mill 8, conveying the mixed mixture from the wheel mill 8 to a ball press 10 by using a belt conveyor 9, then carrying out extrusion forming on the mixture by using the ball press 10 under the extrusion pressure of 20MPa, drying the formed pellets by using a grate dryer, wherein the drying temperature is 200 ℃, the drying time is 60min, conveying the dried pellets into a carbonization furnace 13 by using a screw conveyor 12, and carbonizing the dried pellets in the carbonization furnace 13 at 800 ℃ for 30min by insulating air to obtain the semi-coke, wherein the strength of the semi-coke is 5.5MPa, and the requirement of the calcium carbide raw material on the strength of the semi-coke is met.

EXAMPLE III

Adding tar residue 1 into an edge runner mill 8 by using a weighing and metering bin 7, adding pulverized coal 5 with the water content of 12wt% into the edge runner mill 8 by using a belt weighing scale 6, wherein the charging is carried out according to the proportion of the tar residue 1 to 38wt%, the proportion of the pulverized coal 5 to 62wt%, and the particle grading is as follows: 30wt% of pulverized coal 5 with particle size of 1 mm-5 mm, and 70wt% of pulverized coal 5 with particle size less than 1 mm. At the same time, 1.5wt% of binder A was added. Mixing and stirring for 15min by using a wheel mill 8, conveying the mixed mixture from the wheel mill 8 to a ball press 10 by using a belt conveyor 9, then carrying out extrusion forming on the mixture by using the ball press 10 under the extrusion pressure of 20MPa, drying the formed pellets by using a grate dryer, wherein the drying temperature is 200 ℃, the drying time is 90min, conveying the dried pellets into a carbonization furnace 13 by using a screw conveyor 12, and carbonizing the dried pellets in the carbonization furnace 13 at 800 ℃ for 30min by insulating air to obtain the semi-coke, wherein the strength of the semi-coke is 6.3MPa, and the requirement of the calcium carbide raw material on the strength of the semi-coke is met.

Example four

Adding tar residue 1 into an edge runner mill 8 by using a weighing and metering bin 7, adding pulverized coal 5 with the water content of 4wt% into the edge runner mill 8 by using a belt weighing scale 6, wherein the proportion of the tar residue 1 is 20wt%, the proportion of the pulverized coal 5 is 80wt%, and the grain composition is as follows: 20wt% of pulverized coal 5 with particle size of 1 mm-5 mm, and 80wt% of pulverized coal 5 with particle size less than 1 mm. At the same time, 0.1wt% of binder A was added. Mixing and stirring for 10min by using a wheel mill 8, conveying the mixed mixture from the wheel mill 8 to a ball press 10 by using a belt conveyor 9, then carrying out extrusion forming on the mixture by using the ball press 10, carrying out extrusion pressure of 15MPa, drying the formed pellets by using a grate dryer, wherein the drying temperature is 100 ℃, the drying time is 120min, conveying the dried pellets into a carbonization furnace 13 by using a screw conveyor 12, adding lump coal into the carbonization furnace 13 for carbonization, wherein the proportion of the dried pellets is 10wt% and the proportion of the lump coal is 90wt%, and carrying out air insulation carbonization for 120min in the carbonization furnace 13 at 500 ℃ to obtain semi-coke, the strength of the semi-coke is 5.9MPa, and the requirement of calcium carbide raw materials on the strength of the semi-coke is met.

EXAMPLE five

Adding tar residue 1 into an edge runner mill 8 by using a weighing and metering bin 7, adding pulverized coal 5 with the water content of 15wt% into the edge runner mill 8 by using a belt weighing scale 6, wherein the weight percentage of the tar residue 1 is 50wt%, the weight percentage of the pulverized coal 5 is 50wt%, and the grain composition is as follows: 60wt% of pulverized coal 5 with particle size of 1 mm-5 mm, and 40wt% of pulverized coal 5 with particle size less than 1 mm. At the same time, 10.0wt% of the binder A was added. Mixing and stirring for 20min by using a wheel mill 8, conveying the mixed mixture from the wheel mill 8 to a ball press 10 by using a belt conveyor 9, then carrying out extrusion forming on the mixture by using the ball press 10, carrying out extrusion pressure of 5MPa, drying the formed pellets by using a grate dryer, wherein the drying temperature is 250 ℃, the drying time is 60min, conveying the dried pellets into a carbonization furnace 13 by using a screw conveyor 12, adding lump coal into the carbonization furnace 13 for carbonization, wherein the proportion of the dried pellets is 30wt%, the proportion of the lump coal is 70wt%, and carrying out air insulation carbonization in the carbonization furnace 13 at 800 ℃ for 30min to obtain semi-coke, the strength of the semi-coke is 6.5MPa, and the requirement of calcium carbide raw materials on the strength of the semi-coke is met.

EXAMPLE six

Adding tar residue 1 into an edge runner mill 8 by using a weighing and metering bin 7, adding pulverized coal 5 with the water content of 8.5wt% into the edge runner mill 8 by using a belt weighing scale 6, wherein the proportion of the tar residue 1 is 35wt%, the proportion of the pulverized coal 5 is 65wt%, and the grain composition is as follows: 40wt% of pulverized coal 5 with particle size of 1 mm-5 mm, and 60wt% of pulverized coal 5 with particle size less than 1 mm. At the same time, 5.0wt% of binder A was added. Mixing and stirring for 15min by using a wheel mill 8, conveying the mixed mixture from the wheel mill 8 to a ball press 10 by using a belt conveyor 9, then carrying out extrusion forming on the mixture by using the ball press 10, carrying out extrusion pressure of 10MPa, drying the formed pellets by using a grate dryer, wherein the drying temperature is 175 ℃, the drying time is 90min, conveying the dried pellets into a carbonization furnace 13 by using a screw conveyor 12, adding lump coal into the carbonization furnace 13 for carbonization, wherein the proportion of the dried pellets is 20wt% and the proportion of the lump coal is 80wt%, and carbonizing the dried pellets in the carbonization furnace 13 at 650 ℃ for 75min by insulating air to obtain semi-coke, wherein the strength of the semi-coke is 6.5MPa, and the requirement of calcium carbide raw materials on the strength of the semi-coke is met.

The embodiments in the present specification are described in a progressive manner, and the same or similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments.

The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure.

Claims (6)

1. A device for preparing semi-coke for an acetylene raw material is characterized by comprising an edge runner mill, a ball press, a dryer and a carbonization furnace;

the edge runner mill is used for mixing the input tar residues with the pulverized coal to obtain a mixture;

an input port of a bin of the ball press is communicated with an output port of the edge runner mill, and the input port of the bin of the ball press is used for extruding and forming the mixture input by the edge runner mill to obtain a formed pellet;

the dryer is used for drying the placed molded pellets to obtain dried pellets;

the carbonization furnace is used for carbonizing the placed dry pellets or carbonizing the placed dry pellets and lump coal to obtain the semi coke.

2. The apparatus of claim 1, further comprising a storage bin for storing tar residue;

the output port of storing the storehouse with the collergang intercommunication.

3. The apparatus of claim 2, wherein the outer wall of the hopper of the storage bin is sleeved with a jacket;

a spacing distance is reserved between the inner wall of the jacket and the outer wall of the hopper to form an annular cavity;

and a tail gas output port of the carbonization furnace is communicated with the annular cavity.

4. The apparatus of claim 1, further comprising a belt conveyor, an input end of the belt conveyor being in communication with an output port of the edge runner mill, an output end of the belt conveyor being in communication with an input port of a bin of the ball press machine for inputting the mixture mixed by the edge runner mill into the ball press machine.

5. The apparatus of claim 1, further comprising a screw conveyor, an input end of the screw conveyor being in communication with an output port of the dryer, an output end of the screw conveyor being in communication with an input port of the carbonization furnace for inputting the dried pellets dried by the dryer into the carbonization furnace.

6. The apparatus of claim 1, further comprising a belt scale and a weigh bin;

the output end of the belt scale is connected with the input port of the edge runner mill and is used for quantitatively inputting the pulverized coal into the edge runner mill;

and the output end of the weighing and metering bin is communicated with the input port of the edge runner mill and is used for quantitatively inputting the tar residues into the edge runner mill.

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