CN-122015095-A - Carbon black reaction furnace gas mixer

CN122015095ACN 122015095 ACN122015095 ACN 122015095ACN-122015095-A

Abstract

The invention relates to a fuel gas mixer of a carbon black reaction furnace, which comprises a fuel feeding pipe, a fuel mixing chamber and a fuel discharging pipe, wherein the fuel feeding pipe comprises a first feeding pipe and a second feeding pipe which are longitudinally arranged at the front end of the fuel mixing chamber in parallel, the first feeding pipe and the second feeding pipe are both communicated with the fuel mixing chamber, a plurality of groups of mixing components are transversely arranged in the fuel mixing chamber at intervals to divide the fuel mixing chamber into a plurality of mixing cavities, each group of mixing components comprises two transversely parallel material passing plates, a plurality of material passing holes are uniformly distributed on the two material passing plates, in the same group of mixing components, the material passing holes on the two material passing plates are arranged in a staggered manner, the fuel discharging pipe comprises a first discharging pipe, a second discharging pipe and a mixing discharging pipe, the front ends of the first discharging pipe and the second discharging pipe are respectively communicated with the rear end of the fuel mixing chamber, and the rear ends of the first discharging pipe and the second discharging pipe are simultaneously communicated with the mixing discharging pipe. The gas mixer can fully mix two fuel gases before entering the combustion chamber of the carbon black reaction furnace.

Inventors

ZHANG QINGRUI
Yang Zhepeng
SHAO CONG
HU XINWEN
ZHENG FEITING
ZHANG SHUAI

Assignees

济宁黑猫炭黑有限责任公司

Dates

Publication Date: 20260512
Application Date: 20260320

Claims (9)

1. The fuel gas mixer of the carbon black reaction furnace is characterized by comprising a fuel feeding pipe, a fuel mixing chamber and a fuel discharging pipe, wherein the fuel feeding pipe comprises a first feeding pipe and a second feeding pipe which are longitudinally arranged at the front end of the fuel mixing chamber in parallel, and the first feeding pipe and the second feeding pipe are communicated with the fuel mixing chamber; The fuel mixing chamber is internally and transversely provided with a plurality of groups of mixing components at intervals, and the fuel mixing chamber is divided into a plurality of mixing cavities, each group of mixing components comprises two transversely parallel material passing plates, a plurality of material passing holes are uniformly distributed on the two material passing plates, and the material passing holes on the two material passing plates are arranged in a staggered manner in the same group of mixing components; the fuel discharging pipe comprises a first discharging pipe, a second discharging pipe and a mixing discharging pipe, the front ends of the first discharging pipe and the second discharging pipe are respectively communicated with the rear end of the fuel mixing chamber, the rear ends of the first discharging pipe and the second discharging pipe are simultaneously communicated with the mixing discharging pipe, and the mixing discharging pipe is communicated with the reaction furnace and is used for conveying mixed fuel into the reaction furnace.
2. The carbon black reaction furnace gas mixer according to claim 1, wherein a groined-shaped partition plate is arranged in the fuel feeding pipe, the partition plate is inclined by 3-5 degrees, the front end of the partition plate is close to the axial line of the fuel feeding pipe, and the rear end of the partition plate is far away from the axial line of the fuel feeding pipe.
3. The carbon black reaction furnace gas mixer of claim 1, wherein at least three sets of mixing assemblies are disposed within the fuel mixing chamber.
4. A gas mixer for a carbon black reaction furnace according to claim 3, wherein in the mixing components of different groups, the material passing holes on two adjacent material passing plates are also arranged in a staggered manner.
5. A gas mixer for a carbon black reaction furnace according to claim 3, wherein in the same group of mixing components, the diameters of the material passing holes on two material passing plates are the same or gradually decrease by 1-3 cm in sequence from front to back.
6. The gas mixer for the carbon black reaction furnace according to claim 5, wherein in the mixing components in different groups, the pore diameters of the material passing holes on the adjacent material passing plates are sequentially reduced by 1-3 cm from front to back.
7. The carbon black reaction furnace gas mixer of claim 6, wherein a gap is left between two passing plates in each group of mixing assemblies, and the gap distance is 5-25 cm.
8. The carbon black reaction furnace gas mixer of claim 7, wherein the spacing distance between two passing plates in the first set of mixing assemblies is 20cm, the spacing distance between two passing plates in the subsequent mixing assemblies is sequentially reduced by 5cm, and the spacing distance between two passing plates is always maintained to be greater than 5cm.
9. The carbon black reaction furnace gas mixer according to claim 1, wherein the first discharging pipe, the second discharging pipe and the mixing discharging pipe are arranged in an inverted Y shape, the first discharging pipe and the second discharging pipe are arranged in an inclined mode, the inclined angle is 3-6 degrees, and the mixing discharging pipe is arranged horizontally.

Description

Carbon black reaction furnace gas mixer Technical Field The invention belongs to the technical field of carbon black production equipment, and particularly relates to a fuel gas mixing device for a carbon black reaction furnace, in particular to a fuel gas mixer of the carbon black reaction furnace, which is suitable for a scene of co-combustion of multiple fuels. Background The production of carbon black is a high-energy-consumption technological process, and the running state of a reactor of core equipment directly determines the quality, yield and production cost of a final product. In a carbon black reaction furnace, stable, adequate combustion of fuel is a prerequisite for the generation of clean, high temperature flue gas that provides the necessary energy and reaction environment for the cracking of the feedstock oil and the formation of carbon black. Due to the resource characteristics of the geographical area where the company is located, the objective condition of single fuel supply shortage is faced, and two fuels (such as natural gas and process tail gas or gas with different heat values) with different physical or chemical properties are required to be used simultaneously in the production process. However, conventional combustion systems of the prior art are typically designed for a single, stable fuel (the fuel delivery flow is shown in fig. 1), and it is difficult to achieve efficient, uniform mixing of the two fuels. When the two fuels are not sufficiently mixed, a series of serious technical difficulties are caused: 1. the combustion efficiency is low, and the fuel cannot fully contact combustion air in the reaction furnace, so that incomplete combustion is caused. This not only reduces the efficiency of fuel utilization, resulting in increased fuel consumption, but also may destroy the high temperature environment required for the reaction due to the formation of local low temperature regions in the furnace from unburned components. 2. Uneven reaction temperature field uneven combustion may produce an unstable and uneven temperature field. Flame form diverges, and the high temperature area position drifts, and is difficult to control accurately. The direct result is that when the raw oil is sprayed into the reaction furnace, the temperature fluctuation encountered is large, the cracking reaction is insufficient, and finally the yield of the carbon black product is reduced, and the quality (such as structure, particle size distribution and coloring strength) is unstable. 3. The raw material consumption is high, and part of raw material oil cannot be effectively converted into carbon black products due to low reaction efficiency or is wasted in the form of byproducts, so that the unit consumption of the raw material oil is high. 4. The service life of the equipment is damaged, namely, unstable burning and drifting high-temperature points can generate severe and uneven thermal shock and chemical erosion on the refractory lining of the reaction furnace, particularly on key parts such as a throat pipe, so that the scouring and damage of furnace body materials are accelerated, the service life of the reaction furnace is shortened, and the maintenance cost of the equipment is increased. 5. The production capacity is limited by the comprehensive action of all the factors, so that a technical bottleneck is formed, and the reaction intensity is always sacrificed to maintain the basic product quality, so that the further improvement of the production capacity of the carbon black device is limited. In summary, developing a special device that can effectively adapt to two fuel properties and realize rapid and uniform mixing is a key point that breaks through the bottleneck that currently restricts the development of carbon black production in the aspects of quality, cost, yield and equipment maintenance. Disclosure of Invention The invention aims to overcome the defects of the prior art, and provides a novel gas mixer with reasonable structure and high mixing efficiency, aiming at the problems of uneven mixing and insufficient combustion when two fuels are used in carbon black production. The invention aims to improve the combustion quality by optimizing the fuel mixing effect, thereby stabilizing the reaction process and achieving the comprehensive aims of improving the quality and yield of carbon black products, reducing the consumption of raw materials and fuel, improving the productivity of a device and prolonging the service life of a reaction furnace. In order to achieve the aim, the invention has the core concept that the structure innovation is carried out on the gas mixer, and the unique flow field guiding and mixing mechanism is designed to force the two fuel gases to be fully and effectively mixed in a turbulent flow before entering the combustion chamber of the reaction furnace. The specific technical scheme of the invention is as follows: The fuel gas mixer of the carbon black reaction fu