Pyrolysis tail gas treatment device for preparing resin-based carbon microspheres

Abstract

The utility model discloses a pyrolysis tail gas treatment device for preparing resin-based carbon microspheres, which comprises a condenser and a combustion chamber, and is characterized in that a connecting pipeline is arranged between the condenser and the combustion chamber, and an electromagnetic valve is arranged on the connecting pipeline; a gas inlet pipe for inputting pyrolysis tail gas is mounted on one side of the condenser, and an oil discharge pipe for discharging separated tar is mounted at the bottom of the condenser; the condenser is provided with a medium pipeline used for allowing a heat exchange medium to flow, a cooling medium inlet is formed in one end of the medium pipeline, and a cooling medium outlet is formed in the other end of the medium pipeline. According to the utility model, the tar component in the tail gas can be effectively condensed and recovered, the resource waste is reduced, the follow-up treatment difficulty is reduced, the purification efficiency of the pyrolysis tail gas can be improved, and the emission of harmful substances is reduced, so that the tar can be recovered to realize the cyclic utilization of the resource, and the harmless emission standard is reached.

Description

TECHNICAL FIELD

[0001] The utility model relates to tail gas treatment technical field especially relates to a pyrolysis tail gas treatment device for resin based carbon microspheres preparation. BACKGROUND

[0002] Resin based carbon microspheres are tiny spherical structures made of resin materials, which contain carbon elements. These microspheres usually have high specific surface area and pore structure, thus have good adsorption performance and catalytic activity. In the preparation process of resin based carbon microspheres, pyrolysis technology as one of the key steps not only concerns the quality and yield of the product, but also directly affects the environmental protection and energy efficiency of the production process.

[0003] During pyrolysis, the raw materials undergo complex physical and chemical changes at high temperatures, producing gaseous products containing various components, i.e. pyrolysis tail gas. In addition to containing incompletely reacted hydrocarbons, these tail gases are rich in tar, water vapor, and a small amount of inorganic gases, etc. If not properly treated and directly discharged, it will not only cause environmental pollution, but also waste potential energy resources. SUMMARY

[0004] The utility model overcomes the insufficient prior art and provides a pyrolysis tail gas treatment device for resin based carbon microspheres preparation.

[0005] To achieve the above purpose, the utility model adopts the technical scheme of: a pyrolysis tail gas treatment device for resin based carbon microspheres preparation, comprising: a condenser and a combustion chamber, characterized in that: a connecting pipeline is provided between the condenser and the combustion chamber, and an electromagnetic valve is provided on the connecting pipeline.

[0006] One side of the condenser is provided with an air inlet pipe for inputting pyrolysis tail gas, and the bottom of the condenser is provided with an oil discharge pipe for discharging tar after separation; a medium pipeline for providing the flow of heat exchange medium is provided on the condenser, one end of the medium pipeline is provided with a cooling medium inlet, and the other end is provided with a cooling medium outlet.

[0007] A plurality of catalytic blocks for catalytic reduction of tail gas are stacked inside the combustion chamber, and a discharge cylinder for discharging the reduced tail gas after combustion is installed on the top of the combustion chamber; a burner is installed on one side of the combustion chamber, and an auxiliary gas pipe for inputting combustion auxiliary gas is installed on the other side.

[0008] In a preferred embodiment of the utility model, one end of the auxiliary air pipe is provided with a mixed gas pipeline, one end of the mixed gas pipeline is provided with a mixing assembly, and the mixing assembly is respectively provided with an air pipeline for inputting air and a natural gas pipeline for inputting natural gas; the mixing assembly is used for mixing the gases input by the natural gas pipeline and the air pipeline and inputting the mixed gas into the mixed gas pipeline.

[0009] In a preferred embodiment of the utility model, the mixing assembly comprises: a collecting pipe, a mixing pipe and a diffuser pipe which are sequentially arranged at one end of the collecting pipe; the other end of the collecting pipe is fixedly connected with an ejector pipe, and the side surface of the collecting pipe is fixedly connected with a communication pipe; one end of the diffuser pipe is connected with one end of the mixed gas pipeline, one end of the ejector pipe is connected with one end of the air pipeline, and one end of the communication pipe is connected with one end of the natural gas pipeline.

[0010] In a preferred embodiment of the utility model, the cross-sectional shape of one end of the collecting pipe and the ejector pipe is conical, the cross-sectional shape of the diffuser pipe is a horn structure with a gradually expanding cross section, the conical end of the ejector pipe penetrates into the inside of the collecting pipe, one end of the mixing pipe is fixedly connected with the conical end of the collecting pipe, and the other end of the mixing pipe is fixedly connected with the end of the diffuser pipe with a smaller diameter.

[0011] In a preferred embodiment of the utility model, the air pipeline and the natural gas pipeline are both provided with an adjusting valve for adjusting the mixing ratio of air and natural gas required for combustion.

[0012] In a preferred embodiment of the utility model, a one-way valve is installed on the mixed gas pipeline, and the flow direction of the one-way valve is from the mixing assembly to the auxiliary air pipe.

[0013] In a preferred embodiment of the utility model, a first temperature sensor for detecting temperature is arranged on the condenser and the combustion chamber.

[0014] In a preferred embodiment of the utility model, a second temperature sensor for detecting the temperature of the gas after combustion is arranged on the side surface of the discharge cylinder.

[0015] In a preferred embodiment of the utility model, a pressure sensor for detecting the pressure of the gas after combustion is arranged on the side surface of the discharge cylinder.

[0016] In a preferred embodiment of the utility model, an oxygen content detector for detecting the oxygen content of the gas after combustion is arranged on the side surface of the discharge cylinder.

[0017] The utility model solves the defects in the background art, and has the following beneficial effects:

[0018] (1) The utility model provides a pyrolysis tail gas treatment device for resin based carbon microsphere preparation, through first introducing the pyrolysis tail gas into the condenser, through the cooperation of medium pipeline, cooling medium import, cooling medium export and oil discharge pipe, not only can effectively condense and recover the tar component in tail gas, reduces the resource waste, reduces the subsequent processing difficulty simultaneously, and the condensed tail gas, through the cooperation of combustion chamber, auxiliary gas pipe, catalytic block, combustor and discharge cylinder, not only improves the purification efficiency of pyrolysis tail gas, but also reduces the emission of harmful substances, thereby can recycle tar and realize the recycling of resources, and reach the standard of harmless emission.

[0019] (2) In the utility model, through setting up mixed gas pipeline at one end of auxiliary gas pipe, before the combustion of tail gas in the combustion chamber, through the cooperation of natural gas pipeline, air pipeline, collecting pipe, mixing pipe, diffuser tube, ejector pipe and communication pipe, air and natural gas can be mixed heat transfer, mass transfer, uniform speed, uniform pressure, enter from the inside of mixing pipe to the inside of diffuser tube, and enter the combustion chamber through mixed gas pipeline, and further provide auxiliary gas support combustion process for the combustion of tail gas, thereby improve the combustion treatment efficiency of tail gas. BRIEF DESCRIPTION OF DRAWINGS

[0020] The utility model is further explained below in connection with the drawings and examples;

[0021] Figure 1 It is the pyrolysis tail gas treatment device structure diagram of preferred embodiment of the utility model;

[0022] Figure 2 It is the mixed assembly structure diagram of preferred embodiment of the utility model;

[0023] In the drawing: 1, condenser;11, inlet pipe;12, oil discharge pipe;2, combustion chamber;21, catalytic block;22, discharge cylinder;221, second temperature sensor;222, pressure sensor;223, oxygen content detector;23, combustor;24, auxiliary gas pipe;3, connecting pipeline;31, electromagnetic valve;4, medium pipeline;41, cooling medium import;42, cooling medium export;5, mixed gas pipeline;51, mixed assembly;511, collecting pipe;512, mixing pipe;513, diffuser tube;514, ejector pipe;515, communication pipe;52, air pipeline;53, natural gas pipeline;6, regulating valve;7, check valve;8, first temperature sensor. DETAILED DESCRIPTION

[0024] The utility model will be further explained in detail in connection with the drawings and examples, these drawings are all simplified schematic diagram, just with the schematic way the basic structure of the utility model is shown, therefore it just shows the constitution related to the utility model.

[0025] AsFigure 1 The pyrolysis tail gas treatment device for preparing resin-based carbon microspheres comprises a condenser 1 and a combustion chamber 2, characterized in that a connecting pipeline 3 is arranged between the condenser 1 and the combustion chamber 2, and an electromagnetic valve 31 is arranged on the connecting pipeline 3; a gas inlet pipe 11 for inputting the pyrolysis tail gas is arranged on one side of the condenser 1, and an oil discharge pipe 12 for discharging the separated tar is arranged at the bottom of the condenser 1; a medium pipeline 4 for providing the flow of heat exchange medium is arranged on the condenser 1, one end of the medium pipeline 4 is provided with a cooling medium inlet 41, and the other end is provided with a cooling medium outlet 42; a plurality of catalytic blocks 21 for catalytic reduction of the tail gas are stacked in the combustion chamber 2, and a discharge cylinder 22 for discharging the reduced tail gas after combustion is arranged at the top of the combustion chamber 2; a burner 23 is arranged on one side of the combustion chamber 2, and an auxiliary gas pipe 24 for inputting combustion auxiliary gas is arranged on the other side.

[0026] It should be noted that the catalytic block 21 is a supported catalyst containing noble metal Pd; the shape of the medium pipeline 4 is preferably serpentine, which increases the contact area and improves the heat exchange effect; the cooling medium inlet 41, the medium pipeline 4 and the cooling medium outlet 42 form a heat exchange loop of the condenser 1, and the cooling medium inlet 41 and the cooling medium outlet 42 are connected to a cooling medium temperature control and conveying device, which belongs to the prior art, so the control mode and structural principle will not be explained in detail, and will not be described in detail here; the pyrolysis tail gas is input into the condenser 1 through the gas inlet pipe 11, and the cooling medium temperature control and conveying device connected to the cooling medium inlet 41 and the cooling medium outlet 42 can form a heat exchange loop of the condenser 1 by the cooling medium inlet 41, the medium pipeline 4 and the cooling medium outlet 42, so that the cooling medium can be used to cool the tail gas in the condenser 1, and the temperature is controlled at about 30℃, so that the tar component in the tail gas is condensed and separated out, and discharged through the oil discharge pipe 12. Not only can the tar component in the tail gas be effectively condensed and recovered, but also the resource waste is reduced, and the subsequent processing difficulty is reduced. The condensed tail gas enters the combustion chamber 2 through the connecting pipeline 3 by opening the electromagnetic valve 31, the combustion auxiliary gas is input through the auxiliary gas pipe 24, and the pyrolysis tail gas is burned through the burner 23, so that the combustion temperature is 200-350℃, and the catalytic reduction treatment is carried out through the catalytic blocks 21, so that the hydrocarbon compounds in the tail gas are completely burned and converted into carbon dioxide and water, and finally discharged through the discharge cylinder 22. In this way, not only the purification efficiency of the pyrolysis tail gas is improved, but also the emission of harmful substances is reduced, so that the tar can be recovered to realize the recycling of resources, and the harmless emission standard can be reached.

[0027] As Figure 1 and Figure 2As shown, in some embodiments, a mixed gas pipeline 5 is provided at one end of the auxiliary gas pipe 24, and a mixing component 51 is provided at one end of the mixed gas pipeline 5. The mixing component 51 is provided with an air pipeline 52 for inputting air and a natural gas pipeline 53 for inputting natural gas. The mixing component 51 is used to mix the gas input from the natural gas pipeline 53 and the air pipeline 52 and input it into the mixed gas pipeline 5. The mixing component 51 includes: a manifold 511, a mixing pipe 512 and a diffuser pipe 513 sequentially arranged at one end of the manifold 511; an ejector pipe 514 is fixed at the other end of the manifold 511, and a connecting pipe 515 is fixed on the side of the manifold 511; one end of the diffuser pipe 513 is connected to one end of the mixed gas pipeline 5, one end of the ejector pipe 514 is connected to one end of the air pipeline 52, and one end of the connecting pipe 515 is connected to one end of the natural gas pipeline 53.

[0028] It should be noted that the cross-sectional shape of one end of both the manifold 511 and the ejector 514 is conical, while the cross-sectional shape of the diffuser 513 is a flared structure with a gradually expanding cross-section. The conical end of the ejector 514 extends into the interior of the manifold 511. One end of the mixing pipe 512 is fixed to the conical end of the manifold 511, and the other end is fixed to the smaller diameter end of the diffuser 513. Natural gas is supplied to the connecting pipe 515 at a lower pressure through the natural gas pipeline 53, and air is supplied to the ejector 514 at a higher pressure through the air pipeline 52. The air inside the ejector 514 flows out of the conical end of the ejector 514 at a higher velocity and is ejected into the interior of the manifold 511. The gas enters the manifold 511 through the connecting pipe 515 at a relatively high pressure. As the natural gas is attracted by the low pressure, it is accelerated and drawn into the air. It then enters the mixing pipe 512 through the tapered end of the manifold 511 with a flow channel whose cross-sectional area gradually decreases. This allows the air and natural gas to mix, transfer heat and mass, equalize velocity and pressure. The gas then enters the diffuser pipe 513 from the inside of the mixing pipe 512 and enters the combustion chamber 2 through the mixed gas pipeline 5. This provides auxiliary gas to support the combustion process of the exhaust gas, thereby improving the combustion efficiency of the exhaust gas.

[0029] like Figure 1 As shown, in some embodiments, both the air line 52 and the natural gas line 53 are equipped with regulating valves 6 for adjusting the air-to-natural gas mixing ratio required for combustion. By setting the regulating valves 6, the flow ratio of air and natural gas entering the mixing component 51 can be precisely controlled, thereby achieving precise control of the air-to-natural gas mixing ratio during combustion, thus optimizing combustion efficiency and reducing pollutant emissions.

[0030] In some embodiments, a one-way valve 7 is installed on the mixed gas pipeline 5, and the flow direction of the one-way valve 7 is from the mixing assembly 51 to the auxiliary gas pipeline 24. By arranging the one-way valve 7, the gas can be prevented from flowing backward in the pipeline, which can cause uneven mixing or damage to the equipment. At the same time, the one-way valve 7 also plays an isolation role, preventing the high-temperature gas in the combustion chamber 2 from flowing back to the mixing assembly 51 and affecting its normal operation.

[0031] In some embodiments, a first temperature sensor 8 for detecting temperature is arranged on the condenser 1 and the combustion chamber 2. By arranging the first temperature sensor 8, the temperature in the condenser 1 and the combustion chamber 2 can be monitored in real time. Through the detected temperature data, the flow of the cooling medium and the heat output of the burner 23 can be adjusted, which can realize accurate control of the entire treatment process and ensure stable operation and efficient treatment of the equipment.

[0032] In some embodiments, a second temperature sensor 221 for detecting the temperature of the gas after combustion is arranged on the side of the discharge cylinder 22. By arranging the second temperature sensor 221, the temperature of the gas in the discharge cylinder 22 can be monitored. If the temperature of the exhaust gas is too high, it may indicate that the combustion is incomplete or the catalytic reduction effect is poor. On the contrary, if the temperature is too low, it may indicate that the heat loss is too large or there is a problem in the treatment process.

[0033] In some embodiments, a pressure sensor 222 for detecting the pressure of the gas after combustion is arranged on the side of the discharge cylinder 22. By arranging the pressure sensor 222, the pressure of the gas in the discharge cylinder 22 can be monitored. By detecting the gas pressure, problems such as pressure abnormalities or air flow blockage in the combustion chamber 2 can be found in time, so that appropriate measures can be taken for adjustment.

[0034] In some embodiments, an oxygen content detector 223 for detecting the oxygen content of the gas after combustion is arranged on the side of the discharge cylinder 22. By arranging the oxygen content detector 223, the oxygen content of the gas in the discharge cylinder 22 can be monitored in real time. If the oxygen content is too high, it may indicate that the combustion is incomplete or the air is excessive. On the contrary, if the oxygen content is too low, it may indicate that the combustion chamber 2 is oxygen-deficient or there are other combustion problems. By monitoring the oxygen content data, problems in the combustion process can be found and adjusted in time, ensuring the efficiency and environmental protection of the exhaust treatment.

[0035] In use, the pyrolysis exhaust gas is introduced into the condenser 1 through the inlet pipe 11. Using an external cooling medium temperature control and delivery device, the exhaust gas in the condenser 1 is cooled to approximately 30°C through a loop formed by the cooling medium inlet 41, the medium pipeline 4 (preferably serpentine to increase contact area and improve heat exchange), and the cooling medium outlet 42. This causes the tar components in the exhaust gas to condense and separate, and are discharged through the oil drain pipe 12, achieving effective resource recovery. After the condensed exhaust gas is opened by the solenoid valve 31, it enters the combustion chamber 2 through the connecting pipeline 3. Simultaneously, the auxiliary gas pipe 24 mixes the high-pressure air input from the air pipeline 52 with the natural gas input from the natural gas pipeline 53 through the mixing component 51 to form an auxiliary gas. The mixing component 51 utilizes the jet effect of the ejector pipe 514 and the gradually expanding cross-section structure of the diffuser pipe 513 to achieve thorough mixing, uniform velocity, and uniform pressure of the air and natural gas, which is then sent into the combustion chamber 2 through the mixed gas pipeline 5. Inside combustion chamber 2, supported by burner 23 and auxiliary gas, the exhaust gas is combusted within a temperature range of 200-350℃. Catalytic reduction is achieved using several supported catalyst blocks 21 containing the precious metal Pd, ensuring the complete combustion of hydrocarbons in the exhaust gas into carbon dioxide and water. Throughout the process, a first temperature sensor 8, located on condenser 1 and combustion chamber 2, monitors the temperature and adjusts the cooling medium flow rate and heat output of burner 23. A second temperature sensor 221 on the side of exhaust stack 22 monitors the exhaust gas temperature, a pressure sensor 222 monitors the gas pressure, and an oxygen content detector 223 monitors the oxygen content in real time, ensuring the high efficiency, environmental friendliness, and stable operation of the equipment. Finally, the treated exhaust gas is harmlessly discharged into the atmosphere through exhaust stack 22.

[0036] Based on the above description and the preferred embodiments of this utility model, it will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A pyrolysis tail gas treatment device for the preparation of resin-based carbon microspheres, comprising: A condenser (1) and a combustion chamber (2), characterized in that: a connecting pipe (3) is provided between the condenser (1) and the combustion chamber (2), and a solenoid valve (31) is provided on the connecting pipe (3); The condenser (1) is equipped with an inlet pipe (11) for inputting pyrolysis tail gas on one side, and an oil drain pipe (12) for discharging the separated tar at the bottom of the condenser (1); the condenser (1) is provided with a medium pipeline (4) for providing heat exchange medium flow, and a cooling medium inlet (41) is installed at one end of the medium pipeline (4), and a cooling medium outlet (42) is installed at the other end; The combustion chamber (2) is filled with several catalytic blocks (21) for catalytic reduction of exhaust gas. The top of the combustion chamber (2) is equipped with an exhaust pipe (22) for discharging the exhaust gas reduced product after combustion. A burner (23) is installed on one side of the combustion chamber (2), and an auxiliary gas pipe (24) for inputting combustion auxiliary gas is installed on the other side.

2. The pyrolysis tail gas treatment device for the preparation of resin-based carbon microspheres according to claim 1, characterized in that: One end of the auxiliary gas pipe (24) is provided with a mixed gas pipeline (5), and one end of the mixed gas pipeline (5) is provided with a mixing component (51). The mixing component (51) is provided with an air pipeline (52) for inputting air and a natural gas pipeline (53) for inputting natural gas. The mixing component (51) is used to mix the gas input from the natural gas pipeline (53) and the air pipeline (52) and input it into the mixed gas pipeline (5).

3. The pyrolysis tail gas treatment device for the preparation of resin-based carbon microspheres according to claim 2, characterized in that: The mixing assembly (51) includes: a manifold (511), a mixing pipe (512) and a diffuser pipe (513) sequentially disposed at one end of the manifold (511); an ejector pipe (514) is fixed at the other end of the manifold (511), and a connecting pipe (515) is fixed on the side of the manifold (511); one end of the diffuser pipe (513) is connected to one end of the mixed gas pipeline (5), one end of the ejector pipe (514) is connected to one end of the air pipeline (52), and one end of the connecting pipe (515) is connected to one end of the natural gas pipeline (53).

4. The pyrolysis tail gas treatment device for the preparation of resin-based carbon microspheres according to claim 3, characterized in that: The cross-sectional shape of one end of the collecting pipe (511) and the ejector pipe (514) is conical. The cross-sectional shape of the diffuser pipe (513) is a horn structure with a gradually expanding cross-section. The conical end of the ejector pipe (514) penetrates into the interior of the collecting pipe (511). One end of the mixing pipe (512) is fixed to the conical end of the collecting pipe (511), and the other end is fixed to the smaller diameter end of the diffuser pipe (513).

5. The pyrolysis tail gas treatment device for the preparation of resin-based carbon microspheres according to claim 2, characterized in that: Both the air pipeline (52) and the natural gas pipeline (53) are equipped with regulating valves (6) for adjusting the air-to-natural gas mixing ratio required for combustion.

6. The pyrolysis tail gas treatment device for the preparation of resin-based carbon microspheres according to claim 2, characterized in that: A one-way valve (7) is installed on the mixed gas pipeline (5), and the flow direction of the one-way valve (7) is from the mixing component (51) to the auxiliary gas pipeline (24).

7. The pyrolysis tail gas treatment device for the preparation of resin-based carbon microspheres according to claim 1, characterized in that: Both the condenser (1) and the combustion chamber (2) are equipped with a first temperature sensor (8) for detecting temperature.

8. The pyrolysis tail gas treatment device for the preparation of resin-based carbon microspheres according to claim 1, characterized in that: A second temperature sensor (221) for detecting the temperature of the gas after combustion is installed on the side of the discharge cylinder (22).

9. The pyrolysis tail gas treatment device for the preparation of resin-based carbon microspheres according to claim 1, characterized in that: A pressure sensor (222) for detecting the pressure of the gas after combustion is installed on the side of the discharge cylinder (22).

10. The pyrolysis tail gas treatment device for the preparation of resin-based carbon microspheres according to claim 1, characterized in that: An oxygen content detector (223) for detecting the oxygen content of the gas after combustion is installed on the side of the discharge cylinder (22).

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