Tar residue recycling device
By mixing tar residue with dust collector ash and burning it in a circulating fluidized bed boiler, the problems of secondary pollution and low calorific value utilization in tar residue treatment are solved, realizing the efficient thermal energy reuse of tar residue and the resource utilization of dust collector ash.
Patent Information
- Application Number
- CN202520061206.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-10
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-01-10
AI Technical Summary
Existing methods for treating tar residue suffer from secondary pollution and low calorific value utilization, making it difficult to achieve resource utilization.
After mixing the tar residue with dust collector ash, the mixture is dried and then transported to a circulating fluidized bed boiler for combustion. The dust collector ash is used to reduce the viscosity of the tar residue and improve the calorific value utilization rate, thus avoiding secondary pollution.
This method enables efficient thermal energy reuse of tar residue, reduces the environmental hazards of dust, achieves the goal of resource utilization, and avoids secondary pollution.
Smart Images
Figure CN223726333U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the resource utilization technical field relates to a tar residue recycling device. BACKGROUND
[0002] Tar residue is a kind of viscous solid residual produced in the process of coal pyrolysis and coking, which is listed as hazardous waste due to rich in S, N and halogen compounds, and mixed with a large amount of harmful substances such as polycyclic aromatic hydrocarbons, heavy metals and inorganic salts. Tar residue has large output and wide distribution, and improper disposal will cause great harm to the environment. The current technology is low in efficiency, small in disposal capacity, and easy to cause serious secondary pollution, which is far from the demand of low-carbon and green production of enterprises. The problems caused by tar residue have greatly restricted the development of related coal chemical industry, and seeking a reasonable disposal method for tar residue has become the most urgent demand of the industry.
[0003] Although tar residue is listed as hazardous waste, due to its high calorific value and rich in polyaromatic compounds, tar residue has always been considered as a valuable resource. At present, there are two ways to dispose of tar residue:
[0004] (1) Incineration is a conventional treatment method for industrial hazardous organic waste, which can decompose harmful substances into harmless CO2 through high-temperature oxygen-rich combustion, realizing detoxification of tar residue and recycling its heat value. However, due to the production of dioxin during the combustion of tar residue, there is secondary pollution.
[0005] (2) Soil kiln combustion is the most extensive utilization method, but in the simple combustion environment, a large amount of carcinogenic aromatic hydrocarbons in tar residue will volatilize into the atmosphere, causing serious environmental pollution, and the heat value of tar residue is not effectively utilized.
[0006] Therefore, the existing disposal of tar residue has the problems of secondary pollution and low heat value utilization. CONTENT OF THE UTILITY MODEL
[0007] In view of the technical problems of secondary pollution and low heat value utilization in the existing disposal of tar residue, the utility model provides a tar residue recycling device.
[0008] The utility model mixes and dries tar residue and dust ash, and then conveys them to the circulating fluidized bed boiler for combustion, avoiding secondary pollution and improving the heat value utilization rate of tar residue.
[0009] In order to achieve the above purpose, the utility model adopts the technical scheme of
[0010] A tar residue recycling device, comprising a tar residue storage tank, a dust ash bin, a stirring tank, a drying box and a circulating fluidized bed boiler; the stirring tank, the drying box and the circulating fluidized bed boiler are sequentially communicated, and the tar residue storage tank and the dust ash bin are both communicated with the stirring tank.
[0011] Further limited, the tar residue storage tank and the stirring tank are sequentially provided with a tar residue flow meter and a tar residue control valve along the feeding direction.
[0012] Further limited, the dust ash bin and the stirring tank are sequentially provided with a dust ash flow meter and a dust ash control valve along the feeding direction.
[0013] Further limited, the stirring tank comprises an outer shell, a sealing cover, a stirring mechanism and a motor, the sealing cover covers the top of the outer shell, the motor is arranged on the outer shell, the stirring mechanism is fixed in the outer shell and the top end of the stirring mechanism extends out of the sealing cover and is connected with the motor, and the tar residue storage tank and the dust ash bin are communicated with the outer shell.
[0014] Further limited, the stirring mechanism comprises a stirring rod arranged in the outer shell, the top end of the stirring rod extends out of the sealing cover and is connected with the motor, a first stirring blade is arranged on the stirring rod, and a first stirring rake tooth is arranged on the bottom end of the first stirring blade.
[0015] Further limited, the stirring mechanism further comprises a second stirring blade arranged on the stirring rod, the second stirring blade is symmetrically distributed with the first stirring blade about the axial direction of the stirring rod, a second stirring rake tooth is arranged on the bottom end of the second stirring blade, and the tooth tip of the second stirring rake tooth faces opposite to the tooth tip of the first stirring rake tooth.
[0016] Further limited, the first stirring rake tooth and the second stirring rake tooth are multiple, the multiple first stirring rake teeth are equidistantly distributed along the horizontal direction of the first stirring blade, and the multiple second stirring rake teeth are equidistantly distributed along the horizontal direction of the second stirring blade.
[0017] Further limited, the longitudinal section of the first stirring blade is a right trapezoidal structure, the lower end surface of the first stirring blade is perpendicular to the axial direction of the stirring rod, and the upper end surface of the first stirring blade is downwardly inclined from one end close to the stirring rod to the other end away from the stirring rod, and the structure of the second stirring blade is the same as that of the first stirring blade.
[0018] Further limited, the tar residue recycling device further comprises a fan communicated with the stirring tank.
[0019] Compared with the prior art, the tar residue and the dust ash are mixed and dried, and then are conveyed to the circulating fluidized bed boiler for combustion, the heat value utilization rate is improved, the dust ash is adhered by taking advantage of the high viscosity characteristics of the tar residue, the viscosity of the tar residue is reduced, the feeding of the circulating fluidized bed boiler is facilitated, and secondary pollution is avoided.
[0020] 1、The tar residue and the dust ash are mixed and dried, and then are conveyed to the circulating fluidized bed boiler for combustion, the heat value utilization rate is improved, the dust ash is adhered by taking advantage of the high viscosity characteristics of the tar residue, the viscosity of the tar residue is reduced, the feeding of the circulating fluidized bed boiler is facilitated, and secondary pollution is avoided.
[0021] 2, The utility model discloses a dust ash realizes the heat energy recycling of tar residue, can effectively prevent the dust harm environment during the disposal of dust ash, and simultaneously makes two different solid wastes realize the purpose of resource utilization.
[0022] 3, The recycling device provided by the utility model has small investment, simple structure and easy implementation, realizes resource recycling, and provides a new application approach for the disposal of tar residue and dust ash.
[0023] 4, The utility model discloses a mixing and stirring, drying make tar residue realize detoxification simultaneously, and can recover the heat value, simultaneously reduce the harm of dust ash to society and environment (fine dust ash belongs to inhalable dust, is inhaled to human body after will cause different degree damage to human tissue and system, and causes damage to the photosynthesis and respiration of plant), realizes the harmless treatment of tar residue and the purpose of carbon recycling of dust ash.
[0024] 5, In the utility model, the tar residue dust ash enters the circulating fluidized bed boiler, because it has the environmental protection facilities (desulfurization system) of self, makes the recycling process environmental protection reliable, and the dust ash can also avoid the generation of dust after high-temperature sintering in the circulating fluidized bed boiler. BRIEF DESCRIPTION OF DRAWINGS
[0025] Figure 1 The utility model provides tar residue recycling device structure diagram for the utility model;
[0026] Figure 2 It is device structure diagram between tar residue storage tank, dust ash bin and stirring tank;
[0027] Figure 3 It is specific structure diagram of stirring tank;
[0028] Figure 4 It is overhead structure diagram of stirring mechanism;
[0029] Figure 5 It is structure diagram of stirring rod, first stirring vane and first stirring rake tooth;
[0030] Among them:
[0031] 1 - tar residue storage tank, 2 - dust ash bin, 3 - stirring tank, 310 - outer shell, 320 - sealing cover, 330 - stirring mechanism, 331 - stirring rod, 332 - first stirring vane, 333 - first stirring rake tooth, 334 - second stirring vane, 335 - second stirring rake tooth, 4 - drying box, 5 - circulating fluidized bed boiler, 6 - tar residue flowmeter, 7 - tar residue control valve, 8 - dust ash flowmeter, 9 - dust ash control valve, 10 - fan. DETAILED DESCRIPTION
[0032] The technical scheme of the utility model is explained in detail in combination with the drawings and embodiments.
[0033] Unless otherwise defined, technical terms or scientific terms used in the utility model should be understood as the common meaning by those skilled in the art to which the utility model belongs.
[0034] The technology, method and equipment known to those skilled in the relevant art can not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as part of the specification.
[0035] It should also be understood that the above-described specific embodiments are only for explaining the utility model, and the protection scope of the utility model is not limited thereto, and any skilled person in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered within the protection scope of the utility model / utility model.
[0036] The research and development idea of the utility model is as follows: a large amount of dust generated in the silicon iron smelting process of the electric arc furnace needs to be collected by the bag-type dust collector and then treated, the early dust removal ash is stored and landfilled according to the solid waste, and there are problems of dust raising and heavy metal element leaching to pollute the environment, the problem can be effectively solved by adding clay sintering solidification treatment, but the heat release is not effectively utilized. The dust removal ash contains about 70% SiO2 and about 10% C, so it is a recyclable resource, but the fine particle size characteristic of the electric furnace dust removal ash restricts its direct recycling. Therefore, the innovation of the utility model lies in that the C in the dust removal ash is recycled to reduce the emission of solid waste tar residue, and no secondary pollution to the environment is caused.
[0037] Embodiment 1
[0038] Referring to Figure 1 , the embodiment provides a tar residue recycling device which comprises a tar residue storage tank 1, a dust removal ash bin 2, a stirring tank 3, a drying box 4 and a circulating fluidized bed boiler 5; the stirring tank 3, the drying box 4 and the circulating fluidized bed boiler 5 are sequentially communicated, and the tar residue storage tank 1 and the dust removal ash bin 2 are both communicated with the stirring tank 3.
[0039] Referring to Figure 2 , in the embodiment, a tar residue flow meter 6 and a tar residue control valve 7 are sequentially arranged between the tar residue storage tank 1 and the stirring tank 3 along the feeding direction. The flow of the tar residue can be monitored in real time through the tar residue flow meter 6, then the opening degree of the tar residue control valve 7 is adjusted according to the design flow size, so that the use amount ratio of the tar residue and the dust removal ash meets the requirements.
[0040] Referring to Figure 2In the embodiment, a dust flow meter 8 and a dust control valve 9 are arranged in sequence along the feeding direction between the dust storage bin 2 and the stirring tank 3. The dust flow meter 8 can be used to monitor the flow of the dust in real time, and then the opening of the dust control valve 9 is adjusted according to the designed flow, so as to ensure that the usage ratio of the tar residue and the dust meets the requirements.
[0041] Preferably, the mass ratio of the tar residue and the dust is 2:3. Mixing the tar residue and the dust according to the mass ratio can reduce the viscosity of the tar residue to the greatest extent, and the softening point of the tar residue is greater than 83 DEG C, which meets the feeding requirements of the circulating fluidized bed boiler.
[0042] Referring to Figure 2 The tar residue recycling device provided in the embodiment further comprises a fan 10 which is in communication with the stirring tank 3. This is because the tar residue contains volatile organic compounds, i.e. VOCs, and therefore the VOCs volatilized from the stirring tank 3 are extracted by the fan 10 and then collected for unified treatment, which is more environmentally friendly.
[0043] The working process of the tar residue recycling device provided in the embodiment is as follows:
[0044] Step 1: The tar residue generated from coal pyrolysis and coking is sequentially subjected to mechanical impurity removal in the centrifugal impurity removal unit and then enters the tar residue storage tank 1; meanwhile, the dust generated by the silicon-iron smelting feeding and dust removal system is collected and then transported by gas force to the dust storage bin 2 for storage;
[0045] Step 2: The tar residue control valve 7 and the dust control valve 9 are opened, and the opening of the tar residue control valve 7 and the dust control valve 9 is controlled according to the flow of the tar residue flow meter 6 and the dust flow meter 8, so that the tar residue and the dust enter the stirring tank 3 at a mass ratio of 2:3, and then the mixture is stirred at room temperature for 15 min;
[0046] Step 3: The stirred mixture is transported to the drying box 4 for drying;
[0047] Step 4: The dried mixture is transported to the circulating fluidized bed boiler 5 for combustion, and the combustion temperature of the circulating fluidized bed boiler 5 is 1200 DEG C, so as to realize the recycling of the tar residue and the dust.
[0048] Example 2
[0049] Referring to Figure 3On the basis of the embodiment 1, the tar residue recycling device provided by the embodiment comprises a stirring tank 3, a tar residue storage tank 1 and a dust ash bin 2.
[0050] Preferably, the motor is a servo motor, and the rotating speed thereof is 4500 r / h.
[0051] Preferably, the outer shell 310 is in a cylindrical structure, and the top opening is covered with a sealing cover 320 to avoid pollution caused by direct volatilization of volatile organic compounds (VOCs).
[0052] In order to facilitate connection, the outer shell 310 is respectively provided with a tar residue feeding port, a dust ash feeding port and a mixed material outlet; the tar residue feeding port is in communication with the tar residue storage tank 1; the dust ash feeding port is in communication with the dust ash bin 2; and the mixed material outlet is in communication with the drying box 4.
[0053] Referring to Figure 4 , the stirring mechanism 330 comprises a stirring rod 331 arranged in the outer shell 310; the top end of the stirring rod 331 extends outside the sealing cover 320 and is connected with the motor; the stirring rod 331 is provided with a first stirring blade 332; the motor drives the stirring rod 331 to rotate, thereby driving the first stirring blade 332 to rotate, so as to stir the mixed material in the stirring tank 3.
[0054] Referring to Figure 5 , the stirring rod 331 is in a cylindrical structure, and the axial direction thereof is the same as that of the outer shell 310; the stirring rod 331 is arranged at the central position of the outer shell 310; the longitudinal section of the first stirring blade 332 is in a right-angled trapezoidal structure, and the lower end surface of the first stirring blade 332 is perpendicular to the axial direction of the stirring rod 331; the upper end surface of the first stirring blade 332 extends downward from one end close to the stirring rod 331 to the other end away from the stirring rod 331; that is, the height of the side of the first stirring blade 332 close to the stirring rod 331 is higher than that of the side away from the stirring rod 331.
[0055] Preferably, the bottom end of the first stirring blade 332 is provided with a first stirring rake tooth 333. This is because the tar residue has a certain viscosity, and the first stirring rake tooth 333 can not only enhance the uniformity of stirring, but also improve the stirring speed and shorten the stirring time.
[0056] Preferably, the structure of the second stirring blade 334 is the same as that of the first stirring blade 332, and is distributed in mirror image about the axial direction of the stirring rod 331.
[0057] Referring toFigure 4 The stirring mechanism 330 further comprises second stirring blades 334 arranged on the stirring rod 331; the second stirring blades 334 are symmetrically distributed about the stirring rod 331 with the first stirring blades 332; the second stirring blades 334 rotate synchronously with the first stirring blades 332, thereby improving the stirring efficiency.
[0058] Preferably, second stirring tines 335 are arranged on the bottom ends of the second stirring blades 334; the tine tips of the second stirring tines 335 are oppositely directed to the tine tips of the first stirring tines 333. That is, the tine tips of the second stirring tines 335 are directed to the left side of the stirring rod 331, while the tine tips of the first stirring tines 333 are directed to the right side of the stirring rod 331, thereby accelerating the stirring speed.
[0059] In the embodiment, the first stirring tines 333 and the second stirring tines 335 are both multiple; the multiple first stirring tines 333 are equally spaced along the horizontal direction of the first stirring blades 332; the multiple second stirring tines 335 are equally spaced along the horizontal direction of the second stirring blades 334.
[0060] Preferably, the first stirring tines 333 and the second stirring tines 335 are both five.
[0061] The above are two preferred embodiments of the tar residue recycling device of the present application; the present application mixes and dries the tar residue and the dust removal ash, and then conveys them to the circulating fluidized bed boiler as fuel for combustion, thereby fully utilizing the heat energy of the tar residue, realizing the recycling of the tar residue, and simultaneously utilizing the dust removal ash, thereby avoiding the generation of dust removal ash dust and being more environmentally friendly.
[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application rather than limit the same; although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can still be modified or equivalently replaced; and these modifications or equivalent replacements should not make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present application.
Claims
1. A tar residue recycling apparatus, characterized by comprising: The tar residue storage tank (1), the dust ash bin (2), the stirring tank (3), the drying box (4) and the circulating fluidized bed boiler (5) are sequentially communicated, and the tar residue storage tank (1) and the dust ash bin (2) are both communicated with the stirring tank (3).
2. The tar residue recycling device according to claim 1, characterized in that, The tar residue flow meter (6) and the tar residue control valve (7) are sequentially arranged between the tar residue storage tank (1) and the stirring tank (3) along the feeding direction.
3. The tar residue recycling device according to claim 1, characterized in that, The dust ash flow meter (8) and the dust ash control valve (9) are sequentially arranged between the dust ash bin (2) and the stirring tank (3) along the feeding direction.
4. The tar residue recycling device according to claim 1, characterized by The stirring tank (3) comprises an outer shell (310), a sealing cover (320), a stirring mechanism (330) and a motor, the sealing cover (320) is covered on the top of the outer shell (310), the motor is arranged outside the outer shell (310), the stirring mechanism (330) is arranged in the outer shell (310), and the top end of the stirring mechanism (330) extends outside the sealing cover (320) and is connected with the motor, and the tar residue storage tank (1) and the dust ash bin (2) are both communicated with the outer shell (310).
5. The tar residue recycling device according to claim 4, characterized in that, The stirring mechanism (330) comprises a stirring rod (331) arranged in the outer shell (310), the upper end of the stirring rod (331) extends outside the sealing cover (320) and is connected with the motor, the lower end of the stirring rod (331) is provided with a first stirring blade (332), and the bottom end of the first stirring blade (332) is provided with a first stirring rake (333).
6. The tar residue recycling device according to claim 5, characterized in that, The stirring mechanism (330) further comprises a second stirring blade (334) arranged at the lower end of the stirring rod (331), the second stirring blade (334) is symmetrically distributed with the first stirring blade (332) about the axial direction of the stirring rod (331), the bottom end of the second stirring blade (334) is provided with a second stirring rake (335), and the tooth tips of the second stirring rake (335) are opposite to the tooth tips of the first stirring rake (333).
7. The tar residue recycling device according to claim 6, characterized in that The first stirring rake (333) and the second stirring rake (335) are both a plurality of, the first stirring rakes (333) are equidistantly distributed along the horizontal direction of the first stirring blade (332), the second stirring rakes (335) are equidistantly distributed along the horizontal direction of the second stirring blade (334).
8. The tar residue recycling device according to claim 7, characterized in that, The longitudinal section of the first stirring blade (332) is a right trapezoidal structure, the lower end surface of the first stirring blade (332) is perpendicular to the axial direction of the stirring rod (331), and the upper end surface of the first stirring blade (332) is downwardly and obliquely extended from one end close to the stirring rod (331) to the other end away from the stirring rod (331), and the structure of the second stirring blade (334) is the same as that of the first stirring blade (332).
9. The tar residue recycling device according to any one of claims 1 to 8, characterized in that, The tar residue recycling device further comprises a fan (10) communicated with the stirring tank (3).