A negative pressure dilution delivery device for preventing carbon black polymerization

Abstract

The utility model discloses a kind of negative pressure type dilution conveying devices of preventing carbon black polymerization, belong to particulate matter generation and conveying technical field, including "T" type pipe, the "T" type pipe side is fixedly connected with cooling straight cylinder, the cooling straight cylinder is fixedly connected with dilution pipe away from "T" type pipe side, the dilution pipe is fixedly connected with flue gas pipe away from cooling straight cylinder side, the "T" type pipe other side is installed with screw plug, cooling straight cylinder outer wall integration spiral copper pipe in the utility model, can be externally connected circulating cooling water, combine semiconductor refrigeration sheet, realize "double cooling mode", to realize rapid cooling, inhibit carbon black particle agglomeration, so that high-temperature particles are stabilized in temperature before entering main dilution zone Handle, simultaneously adopt the design of inverted "T" type pipe and the screw plug with bevel combination, further reduce airflow direct impact, reduce particle vertical rebound, in addition still have easy reform, scalable and other characteristics.

Description

TECHNICAL FIELD

[0001] The utility model relates to particulate matter generation and conveying technical field, concretely to a kind of negative pressure type dilution conveying device of preventing carbon black polymerization. BACKGROUND

[0002] Carbon black is the product of incomplete combustion of hydrocarbons, in the form of nano-sized particles, with a particle size of 10-500 nm, has high specific surface area and porous structure, widely used in rubber, paint, battery and other fields.

[0003] However, the existing carbon black particle conveying and aerosol generation technology faces many technical obstacles. The current mainstream aerosol generation device mainly relies on passive dilution methods such as compressed air blowing or mechanical stirring, which exposes problems such as uneven particle concentration distribution, severe pipe wall deposition, lagging response and low energy efficiency in actual use. Especially in the application scenarios of nano-sized particles (<100 nm) processing, ultra-low concentration (μg / m 3 The performance of traditional technical solutions is more limited.

[0004] More seriously, carbon black particles will exhibit obvious agglomeration under high temperature (>300℃) conditions. High temperature promotes the melting of the particle surface, exacerbating the physical adhesion between particles. At the same time, chemical bonding between oxygen-containing functional groups and enhanced van der Waals forces further promote particle agglomeration. These mechanisms lead to an increase in particle collision probability, ultimately forming hard agglomerates or chain-like aggregates that are difficult to disperse, not only changing the particle size distribution, but also possibly causing pipe blockage and detection errors, seriously affecting the precise delivery and application performance of carbon black. Therefore, a negative pressure type dilution conveying device is proposed to prevent carbon black polymerization. SUMMARY

[0005] The utility model aims at providing a kind of negative pressure type dilution conveying device of preventing carbon black polymerization to solve the problems raised in the above background art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a kind of negative pressure type dilution conveying device of preventing carbon black polymerization, including "T" type pipe, the "T" type pipe one side is fixedly connected with cooling straight cylinder, the cooling straight cylinder is fixedly connected with dilution pipe away from "T" type pipe side, the dilution pipe is fixedly connected with flue away from cooling straight cylinder side, the "T" type pipe other side is installed with screw plug;

[0007] Wherein, the screw plug is obliquely arranged at one end of the "T" type pipe.

[0008] As a further preferred embodiment of this technical solution: the "T" tube adopts an inverted "T" installation, and a screw plug is used on the left side of the inverted "T" tube. The angled screw plug further reduces the direct impact of airflow and reduces the vertical rebound of particles.

[0009] The dilution tube is powered by compressed air. By utilizing the ejection effect of high-speed airflow, the air at the inlet end of the dilution tube is drawn out and ejected to the outlet end, thereby forming a stable negative pressure airflow in the pipe, which actively draws in and transports the carbon black particles from the generating device.

[0010] As a further preferred embodiment of this technical solution: the vertical section of the "T"-shaped pipe is provided with a smoke inlet, which facilitates the entry of carbon black gas flow into the pipe.

[0011] As a further preferred embodiment of this technical solution: a semiconductor cooling chip and a temperature and humidity sensor are respectively installed on the cooling cylinder. The semiconductor cooling chip and the copper tube form a "dual-layer cooling mode", thereby achieving precise temperature control and suppressing high-temperature agglomeration of carbon black. The temperature and humidity sensor monitors the temperature and humidity of the particulate atmosphere in the pipeline in real time to prevent carbon black from melting and adhering to the pipe wall due to high temperature.

[0012] As a further preferred embodiment of this technical solution: a copper tube is wound around the cooling cylinder, with an inlet and an outlet at each end of the copper tube. Circulating cooling water is connected to the copper tube, and combined with a semiconductor refrigeration chip, rapid cooling is achieved to suppress the agglomeration of carbon black particles.

[0013] As a further preferred embodiment of this technical solution: the dilution pipe is provided with an air inlet, which is connected to compressed air controlled by an external flow meter.

[0014] As a further preferred embodiment of this technical solution: a flow rate sensor is installed on the exhaust pipe, and an exhaust port is opened on the side of the exhaust pipe away from the dilution pipe. The flow rate sensor monitors the flow rate of the carbon black dilution medium in the conveying pipeline in real time, and the redundant gas generated during the conveying process is discharged through the exhaust port.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model adopts a synergistic mechanism of negative pressure suction and airflow regulation. Through an active suction dilution mechanism, it realizes dynamic mixing of particulate matter and dilution gas, directly adjusts the mixing ratio, overcomes the problem of uneven concentration caused by passive diffusion in traditional dilution methods, and ensures the stability and controllability of particle concentration during transportation.

[0017] 2. The outer wall of the cooling cylinder of this utility model is integrated with a spiral copper tube, which can be connected to external circulating cooling water. Combined with a semiconductor cooling chip, it realizes a "dual-layer cooling mode", thereby achieving rapid cooling, inhibiting the agglomeration of carbon black particles, and stabilizing the temperature of high-temperature particles before they enter the main dilution zone.

[0018] 3. The present invention adopts a design that combines an inverted "T" shaped tube with a screw plug with a bevel, which further reduces the direct impact of airflow and reduces the vertical rebound of particles. In addition, it also has the characteristics of being easy to modify and expandable.

[0019] 4. Based on real-time temperature and flow rate data feedback, this utility model dynamically adjusts the cooling power and dilution airflow speed to achieve closed-loop precise control of temperature fluctuations and particle concentration, thereby improving the overall adaptability of the device and ensuring stable particulate matter delivery under different operating conditions. Attached Figure Description

[0020] Fig. 1 This is a schematic diagram of the structure of a negative pressure dilution conveying device for preventing carbon black polymerization according to this utility model;

[0021] Fig. 2 This is a three-dimensional structural diagram of a negative pressure dilution conveying device for preventing carbon black polymerization according to this utility model;

[0022] Fig. 3 This is a partial cross-sectional structural diagram of a negative pressure dilution conveying device for preventing carbon black polymerization according to this utility model.

[0023] In the diagram: 1. T-shaped tube; 11. Smoke inlet; 2. Cooling cylinder; 21. Semiconductor cooling chip; 22. Temperature and humidity sensor; 23. Copper tube; 231. Water inlet; 232. Water outlet; 3. Dilution tube; 31. Air inlet; 4. Smoke exhaust pipe; 41. Flow rate sensor; 42. Smoke exhaust port; 5. Screw plug. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0025] Example

[0026] Please see Figs. 1-3 This utility model provides a technical solution: a negative pressure dilution conveying device for preventing carbon black polymerization, including a "T" shaped tube 1, a cooling cylinder 2 welded to one side of the "T" shaped tube 1, a dilution tube 3 welded to the side of the cooling cylinder 2 away from the "T" shaped tube 1, a smoke exhaust pipe 4 welded to the side of the dilution tube 3 away from the cooling cylinder 2, and a screw plug 5 threadedly connected to the other side of the "T" shaped tube 1.

[0027] Among them, the screw plug 5 passes through one end of the "T"-shaped tube 1 and is set at an angle.

[0028] In this embodiment, specifically: the "T"-shaped tube 1 is installed in an inverted "T" shape, and a screw plug 5 with a bevel is used on the left side of the inverted "T"-shaped tube 1. The screw plug 5 with a bevel can further reduce the direct impact of airflow and reduce the vertical rebound of particles.

[0029] The dilution pipe 3 is powered by compressed air. By utilizing the ejection effect of high-speed airflow, the air at the inlet end of the dilution pipe 3 is attracted and ejected to the outlet end, thereby forming a stable negative pressure airflow in the pipe, which causes the carbon black particles to be actively drawn in and transported from the generating device.

[0030] In this embodiment, specifically, the vertical section of the "T"-shaped pipe 1 is provided with a smoke inlet 11, which facilitates the entry of carbon black gas flow into the pipe.

[0031] In this embodiment, specifically: a semiconductor cooling chip 21 and a temperature and humidity sensor 22 are respectively installed on the cooling cylinder 2. The semiconductor cooling chip 21 and the copper pipe 23 (circulating water cooling) form a "dual-layer cooling mode", thereby achieving precise temperature control and suppressing the high-temperature agglomeration of carbon black. The temperature and humidity sensor 22 monitors the temperature and humidity of the particulate atmosphere in the pipeline in real time to prevent carbon black from melting and adhering to the pipe wall due to high temperature.

[0032] In this embodiment, specifically: a copper tube 23 is wound around the cooling cylinder 2, and an inlet 231 and an outlet 232 are respectively opened at both ends of the copper tube 23. The copper tube 23 is used to connect external circulating cooling water, and combined with the semiconductor cooling chip 21, it can achieve rapid cooling and suppress the agglomeration of carbon black particles.

[0033] In this embodiment, specifically: an air inlet 31 is provided on the dilution tube 3, through which external compressed air controlled by a flow meter is connected. The flow meter controls the compressed air flow rate by setting an initial gas flow rate value, and the gas flow rate sensor in the test tube provides real-time dynamic feedback to control the compressed air flow rate.

[0034] In this embodiment, specifically: a flow rate sensor 41 is installed on the exhaust pipe 4, and an exhaust port 42 is opened on the side of the exhaust pipe 4 away from the dilution pipe 3. The flow rate sensor 41 is used to monitor the flow rate of the carbon black dilution medium (such as carbon black-containing gas) in the conveying pipeline in real time, and the exhaust port 42 is used to discharge the redundant gas generated during the conveying process.

[0035] Working principle: First, the "T"-shaped pipe 1 is installed in an inverted "T" shape. The inlet 11 of its vertical section is precisely connected to the airflow outlet of the carbon black generator to ensure that the carbon black-containing airflow can smoothly enter the pipeline. The screw plug 5 installed on the left side of the "T"-shaped pipe 1 penetrates one end of the pipe body and is set at an angle. This structure can weaken the direct impact of the airflow on the pipe wall in the early stage of airflow entry, reduce the vertical rebound phenomenon of carbon black particles caused by impact, and reduce the probability of carbon black particles colliding and agglomerating from the source of transportation.

[0036] Next, the air inlet 31 on the dilution pipe 3 is connected to compressed air controlled by a flow meter. When the compressed air enters the dilution pipe 3 at a set initial flow rate, the high-speed airflow ejection effect creates a low-pressure area at the air inlet of the dilution pipe 3. The air is continuously attracted and sprayed at high speed to the outlet. This process creates a stable negative pressure airflow field in the entire continuous pipeline. Under the adsorption effect of the negative pressure, the carbon black particles in the carbon black generator are actively drawn in from the smoke inlet 11 of the "T"-shaped pipe 1 along with the airflow and enter the core conveying path of the device, realizing the efficient introduction of carbon black particles.

[0037] Subsequently, the carbon black-containing airflow enters the cooling cylinder 2 under negative pressure. At this time, the dual cooling in the cooling cylinder 2 is started simultaneously. On the one hand, the copper pipe 23 surrounding the outside of the cooling cylinder 2 is connected to the circulating cooling water through the water inlet 231. The cooling water flows continuously in the copper pipe 23 and absorbs the heat of the airflow in the pipe through heat conduction. On the other hand, the semiconductor cooling chip 21 installed on the cooling cylinder 2 is powered on and directly cools the inside of the pipe. The two form a "dual-layer cooling mode", which can quickly reduce the temperature of the carbon black-containing airflow to a range where carbon black is not easy to agglomerate. At the same time, the temperature and humidity sensor 22 on the cooling cylinder 2 collects the temperature and humidity data of the particulate atmosphere in the pipe in real time and feeds the data back to the control system. If the temperature exceeds the set threshold, the system can adjust the cooling water flow or the power of the semiconductor cooling chip 21 in time to achieve precise temperature control and effectively prevent carbon black from adhering to the pipe wall due to high temperature melting, further inhibiting the agglomeration of carbon black particles.

[0038] Finally, the carbon black-containing dilution medium (a gas mixture containing carbon black) that has undergone cooling treatment continues to enter the exhaust pipe 4 under negative pressure. The flow rate sensor 41 installed on the exhaust pipe 4 monitors the flow rate of the medium in real time and feeds the flow rate data back to the control system. The control system compares the real-time flow rate with the set flow rate. If there is a deviation, the compressed air flow rate at the air inlet 31 of the dilution pipe 3 can be adjusted (achieved by using a flow meter) to ensure that the medium in the pipeline is always transported at a stable flow rate, avoiding carbon black deposition or agglomeration due to excessively fast or slow flow rates. At the same time, redundant gas generated during the transportation process is discharged in time through the exhaust port 42 to maintain the air pressure balance in the pipeline, ensuring the continuity and stability of the entire transportation process, and ultimately achieving efficient and stable negative pressure dilution and transportation of carbon black particles under the premise of preventing agglomeration.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A negative pressure dilution conveying device for preventing carbon black polymerization, comprising a "T"-shaped pipe (1), characterized in that: A cooling cylinder (2) is fixedly connected to one side of the "T"-shaped tube (1), a dilution tube (3) is fixedly connected to the side of the cooling cylinder (2) away from the "T"-shaped tube (1), a smoke exhaust pipe (4) is fixedly connected to the side of the dilution tube (3) away from the cooling cylinder (2), and a screw plug (5) is installed on the other side of the "T"-shaped tube (1). The screw plug (5) is inserted through one end of the "T"-shaped tube (1) and is set at an angle.

2. The negative pressure dilution conveying device for preventing carbon black polymerization according to claim 1, characterized in that: The vertical section of the "T"-shaped pipe (1) is provided with a smoke inlet (11).

3. The negative pressure dilution conveying device for preventing carbon black polymerization according to claim 1, characterized in that: The cooling cylinder (2) is equipped with a semiconductor refrigeration chip (21) and a temperature and humidity sensor (22).

4. The negative pressure dilution conveying device for preventing carbon black polymerization according to claim 1, characterized in that: A copper tube (23) is wound around the cooling cylinder (2), and an inlet (231) and an outlet (232) are respectively opened at both ends of the copper tube (23).

5. The negative pressure dilution conveying device for preventing carbon black polymerization according to claim 1, characterized in that: An air inlet (31) is provided on the dilution tube (3).

6. The negative pressure dilution conveying device for preventing carbon black polymerization according to claim 1, characterized in that: A flow rate sensor (41) is installed on the exhaust pipe (4), and an exhaust port (42) is opened on the side of the exhaust pipe (4) away from the dilution pipe (3).

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