阅读说明：本技术 一种混气炭黑生产的汽化塔 (Vaporization tower for producing carbon black by gas mixing ) 是由 周华良 于 2021-09-05 设计创作，主要内容包括：本发明的一种混气炭黑生产的汽化塔,属于混气炭黑生产技术领域；改变传统混气炭黑生产的核心设备,由汽化塔代替汽化釜,解决了汽化釜底用可燃气体直接加热造成釜底沥青高温结焦,不能在恒定的工况下长期连续稳定运行,产品质量、产量不稳定的问题。汽化塔以对流、传导进行热量交换,塔底油利用生产线余热打循环进行加热,塔内原料油(蒽油)气化温度稳定,气化更充分,气化出的物质组分分布窄,生产出的炭黑粒径分布窄,炭黑着色强度高,黑度高,分散性好,色相好,流动性更好,消耗更低。塔底油连续排沥青,避免塔底蒽油中的沥青被浓缩而结焦,确保汽化塔在恒定工况下长期连续稳定运行。(The invention relates to a vaporization tower for producing mixed gas carbon black, belonging to the technical field of mixed gas carbon black production; the core equipment for producing the traditional gas-mixed carbon black is changed, the vaporization tower replaces a vaporization kettle, and the problems that the pitch at the bottom of the kettle is coked at high temperature due to the direct heating of combustible gas at the bottom of the vaporization kettle, the kettle cannot continuously and stably operate for a long time under a constant working condition, and the product quality and the yield are unstable are solved. The vaporization tower exchanges heat by convection and conduction, the tower bottom oil is heated by circulating by utilizing the waste heat of a production line, the gasification temperature of the raw oil (anthracene oil) in the tower is stable, the gasification is more sufficient, the gasified substance components are narrowly distributed, the particle size distribution of the produced carbon black is narrow, the coloring strength of the carbon black is high, the blackness is high, the dispersibility is good, the hue is good, the fluidity is better, and the consumption is lower. And the asphalt is continuously discharged from the tower bottom oil, so that the asphalt in the tower bottom anthracene oil is prevented from being concentrated and coked, and the long-term continuous and stable operation of the vaporization tower under a constant working condition is ensured.)

1. The vaporization tower for producing the gas-mixed carbon black comprises a manhole (1), and comprises a coke oven gas distributor (2), and is characterized in that the angle between distribution pipes is 120 degrees⁰And go deep into in the different degree of depth oil reservoirs, the vaporization tower include raw materials (anthracene oil) distributor (3), the equipartition has a plurality of apertures under its characterized in that distributor pipeline, the vaporization tower is including realizing gas-liquid separation's float valve tray (4), the vaporization tower includes float valve tray inspection hole (5), the vaporization tower includes anthracene oil vaporization gas and coke oven gas mist outlet (6), the vaporization tower includes bottom oil heating circulating pump (8), the vaporization tower includes bottom oil extrinsic cycle heater (7), the vaporization tower includes extrinsic cycle heating oil distributor (9), the equipartition has a plurality of apertures under its characterized in that pipeline, the vaporization tower includes pitch oil tank (10).

2. The vaporization tower for producing carbon black with mixed gas according to claim 1, wherein the angle between the distribution pipes of the coke oven gas distributor (2) is120⁰。

3. The vaporization tower for producing carbon black by mixing gas according to claim 1, wherein the distribution pipe of the coke oven gas distributor (2) extends into oil layers with different heights.

4. The vaporization tower for producing carbon black with mixed gas according to claim 1, wherein the raw material (anthracene oil) distributor (3) is provided with a plurality of small holes under the pipeline.

5. The vaporization tower for producing carbon black with mixed gas according to claim 1, wherein the outer circulation heating oil distributor (9) is provided with a plurality of small holes under the pipeline.

6. The vaporization tower for producing carbon black with mixed gas according to claim 1, wherein the external circulation heater (7) for tower bottom oil utilizes the waste heat of the production line to supply heat required for heating the raw oil (anthracene oil) at the tower bottom.

7. The vaporization tower for producing carbon black by mixing gas according to claim 1, wherein the gas mixture of anthracene oil vaporized gas and coke oven gas of the vaporization tower is subjected to gas-liquid separation by using a float valve tray (4).

Technical Field

The invention belongs to the technical field of gas-mixed carbon black production, and particularly relates to a vaporization tower which can gasify anthracene oil serving as a raw material produced by gas-mixed carbon black without directly heating fuel and can never coke the anthracene oil at the bottom of the tower.

Background

The mixed gas carbon black is formed by that the mixed gas of gasified solid or liquid hydrocarbon and combustible gas (also called as fuel gas) enters a fire house and is subjected to incomplete combustion and cracking with air through thousands of fire nozzles. Common fuel-carrying gases include coke oven gas, city gas, water gas, blast furnace gas, etc. The key of the production process of the gas-mixed carbon black is how to gasify a solid or liquid raw material and mix the solid or liquid raw material with a carrier gas, a gasification device is a core device in the production of the gas-mixed carbon black and directly influences the quality and the yield of products, domestic gas-mixed carbon black manufacturers adopt a traditional gasification device, namely a gasification kettle, the raw material (anthracene oil) is added into the gasification kettle, the kettle bottom is directly combusted and heated by natural gas or coke oven gas, the anthracene oil at the kettle bottom contains asphalt, the anthracene oil at the kettle bottom is gasified, the asphalt in the anthracene oil is concentrated to generate high-temperature coking, the surface influences the transfer of the heat of the gasification kettle, the gasification quantity of the gasification kettle is reduced, even the gasification kettle cannot normally run, the quality of the products is unstable, the yield can also be reduced along with the prolonging of the running time of the gasification kettle, the gasification kettle is finally switched to a spare gasification kettle, the asphalt coking of the gasification kettle from the delivery to the kettle bottom cannot be put into use, and the process is generally 4-6 months, the product quality and yield of the process are gradually reduced, and the quality stability is poor.

The vaporization kettle is directly combusted and heated by combustible gas at the bottom of the kettle, the gasification of the gas-mixed carbon black raw oil is realized by conduction, the bottom oil of the kettle is directly heated, the temperature of the bottom of the kettle exceeds 400 ℃, the raw oil in the kettle and the top of the kettle realizes the gasification of the oil by virtue of the heat conduction of the bottom oil of the kettle, the raw oil (anthracene oil) mainly comprises hydrocarbon substances with the boiling point of 270 plus and 360 ℃, the asphalt is gasified when the temperature exceeds 360 ℃, the asphalt of the bottom oil of the kettle is concentrated, the vaporization kettle is used as gasification equipment for producing the gas-mixed carbon black, the hydrocarbon substances in the raw oil (anthracene oil) between 270 plus and 420 ℃ can be gasified, the gasified hydrocarbon substances have wide distribution, the cracking temperatures required by the combustion and cracking of the hydrocarbon substances to form the carbon black are different, the hydrocarbon substances are cracked at different temperatures to form the carbon black, the particle size distribution of the produced carbon black is wide, and the coloring strength of the carbon black is low, low blackness, poor dispersibility and poor hue.

In recent years, professional carbon black design institutes have developed and released devices for new process furnace carbon black at the first place, and almost no technical improvement research is put into the aspect of gas-mixed carbon black, so that the core equipment of the gas-mixed carbon black production technology is basically not changed. The technology improvement of core equipment for improving the inherent quality of products is not much developed, and the difference between the inherent quality of products such as stability, dispersibility, coloring strength, hue and the like of the product and imported carbon black is large.

Disclosure of Invention

The invention overcomes the defects of the prior art and invents a vaporization tower for producing mixed gas carbon black. The defect that the gas-mixed carbon black vaporization kettle cannot continuously and stably operate is overcome, the stability of the product quality is overcome, the product quality is improved, and the production cost is reduced.

In order to achieve the purpose, the invention is realized by the following technical scheme:

the raw oil for producing the mixed gas carbon black of our company is anthracene oil, the carrier gas is coke oven gas, and the following explains anthracene oil and coke oven gas, the anthracene oil enters a vaporization tower from a raw material (anthracene oil) distributor and is uniformly sprayed out from holes uniformly distributed below a pipeline from the distributor, the pressure of the anthracene oil in the pipeline of the distributor is greater than that in the vaporization tower, when the high-temperature and high-pressure anthracene oil is sprayed out from the distributor and the pipeline, the pressure is suddenly released, and a part of the anthracene oil is gasified, and meanwhile, the oil inlet of the mode effectively avoids the impact on the bottom oil of the vaporization tower, and the stability of the gasification amount of the mixed gas carbon black production raw material oil is ensured. Coke oven gas uniformly enters from three directions of the circumference of the vaporization tower through a coke oven gas distributor, three gas inlet pipes are respectively inserted into three positions with different depths of an anthracene oil layer at the bottom of the vaporization tower, and since the carrier gas is heated to about 360 ℃ by using the waste heat of a production line before entering the vaporization tower, anthracene oil in three height layers is respectively heated and gasified, and meanwhile, the anthracene oil in the vaporization tower is blown, so that the convection heat transfer is realized, and the anthracene oil in the vaporization tower is fully and rapidly gasified. The coke oven gas carries gasified anthracene oil, gas-liquid separation is carried out through a three-layer floating valve tray IV, it is ensured that mixed gas discharged from a vaporization tower does not contain liquid anthracene oil, the mixed gas is discharged from a top outlet of the vaporization tower and enters a firebox to be used as a raw material for producing mixed gas carbon black, in order to ensure the stability of the raw material for producing the mixed gas carbon black, the coke oven gas is measured by a pore plate flowmeter and is automatically regulated by a DCS system through a regulating valve, but the gasification amount of the liquid raw material anthracene oil in the vaporization tower cannot be measured, and the gasification amount of the anthracene oil can be indirectly controlled only by depending on parameters such as the liquid level of the vaporization tower, the temperature at the bottom of the vaporization tower, the pressure of the vaporization tower, the preheating temperature of the coke oven gas and the like, and the key problem solved by the invention is solved. The tower bottom anthracene oil is heated by a tower bottom oil heating circulating pump (B), the vaporized tower bottom anthracene oil is pumped out and pumped to a tower bottom oil external circulating oil heater for heating, the tower bottom oil heating circulating pump (B) regulates the rotating speed of the tower bottom oil heating circulating pump (B) by a frequency converter according to the bottom temperature of the vaporized tower, the circulating quantity of the tower bottom oil heating circulating pump (B) is regulated according to the tower bottom temperature of the vaporized tower, the bottom temperature of the vaporized tower is controlled within the range of +/-2 ℃, the tower bottom oil external circulating heater (B) is heated in a circulating manner, small holes uniformly distributed under an external circulating heating oil distributor pipeline uniformly enter the vaporized tower, the circulating oil returns to the tower to impact and disturb the oil layer in the tower greatly, the stability of the working condition in the vaporized tower is ensured, according to the height of the content of anthracene oil, an outlet branch pipe of the tower bottom oil heating circulating pump (B) continuously discharges a part of the vaporized tower bottom oil to an asphalt tank (B) through a regulating valve, the phenomenon that the vaporized tower bottom asphalt is concentrated and the gasified quantity of the vaporized tower bottom oil is influenced, therefore, the long-term continuous and stable operation of the gasification tower is ensured, the oil inlet flow and the oil discharge flow are cooperatively regulated, the liquid level at the bottom of the gasification tower is controlled within the range of +/-20 mm, the coke oven gas preheater is arranged on a flue gas pipeline, the preheating temperature of the coke oven gas can be stabilized within the range of 360 +/-2 ℃ under the condition of stable production working conditions, the stability of the working conditions of the gasification tower is ensured by regulation and control from multiple aspects, the constant gasification amount of anthracene oil in the gasification tower is indirectly realized, and the stability of the product quality is ensured.

Preferably, 20 DN20 small holes are uniformly distributed below the pipeline of the raw material (anthracene oil) distributor (3).

Preferably, the coke oven gas distributor (2) enters from three directions of the vaporization tower, and the included angle between adjacent pipelines is 120 degrees.

Preferably, the air inlet pipes of the coke oven gas distributor (2) respectively enter oil layers at the bottoms of the vaporization towers at different depths.

Preferably, the gas-liquid separation tray is a float valve tray.

Preferably, the tower bottom oil heating circulating pump (8) is a high-temperature centrifugal pump.

Preferably, 20 small holes DN30 are uniformly distributed on the external circulation heating oil distributor.

Compared with the prior art, the invention has the following beneficial effects:

according to the invention, anthracene oil uniformly enters the vaporization tower through the raw material (anthracene oil) distributor (3), so that the impact on bottom oil of the vaporization tower is avoided, and the stability of the working condition in the vaporization tower is ensured, thereby ensuring the stability of the raw material for producing the gas-mixed carbon black.

The invention uniformly enters the gas-carrying coke oven gas from the coke oven gas distributor and respectively enters different depths of the oil layer of the vaporization tower, reduces the interference among the gas inlet pipes, gasifies anthracene oil in three layers with different heights respectively, and simultaneously stirs the oil layer in the tower, thereby realizing convection heat transfer, fully gasifying the anthracene oil in the vaporization tower and ensuring the stability of product quality and yield.

Through the outer circulation heater (7) of tower bottom oil, utilize the production line waste heat to heat gasification tower bottom oil, guarantee the stability of gasification tower bottom oil temperature to the stability of anthracene oil gasification volume in the vaporization tower has been guaranteed, this kind of mode of heating oil, the temperature of oil is not surpassed 360 ℃, pitch can not concentrated by the gasification in the anthracene oil, has avoided coking because of pitch concentration overtemperature has guaranteed the continuous steady operation of vaporization tower, thereby has guaranteed the stability of carbon black quality, output.

The invention does not need the coal gas burning at the bottom of the original vaporization kettle to provide heat, utilizes the waste heat of the production line, realizes the control of the temperature of the tower bottom oil through the tower bottom oil external circulation heater (7), and the invention can accurately control the temperature of the tower bottom oil, ensure the constant gasification quantity of the anthracene oil of the vaporization tower, ensure the quality of carbon black products, greatly save the coal gas consumption and reduce the production cost.

According to different production varieties, the temperature of the tower bottom is controlled between 270 ℃ and 320 ℃, anthracene oil in the tower realizes heat exchange by means of conduction and convection, gasified hydrocarbon substances are relatively concentrated, the components of the gasified hydrocarbon substances are distributed narrowly, all the hydrocarbon substances are combusted and cracked to form carbon black at the same temperature, and the produced carbon black is narrow in particle size distribution, high in coloring strength, high in blackness, good in dispersity, good in hue and good in quality stability.

Drawings

FIG. 1 is a schematic diagram of a vaporization column configuration;

FIG. 2 is a schematic diagram of a float valve tray configuration;

FIG. 3 is a schematic diagram of a feed (anthracene oil) distributor configuration;

FIG. 4 is a schematic diagram of a coke oven gas distributor distribution;

FIG. 5 is a schematic view of the orifice of the vaporization tower;

wherein, 1 is a manhole, 2 is a coke oven gas distributor, 3 is a raw material (anthracene oil) distributor, 4 is a float valve tray, 5 is a tray inspection hole, 6 is a mixed gas outlet, 7 is a tower bottom oil external circulation heater, 8 is a tower bottom oil heating circulating pump, 9 is an external circulation heating oil distributor, and 10 is an asphalt oil tank.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail with reference to the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solutions of the present invention are described in detail below with reference to examples, but the scope of protection is not limited thereto.

Example 1

The method comprises the steps that anthracene oil is pumped out from an oil storage tank by a raw oil pump, the anthracene oil is preheated to 250 ℃ by a heat exchanger, then the anthracene oil enters a vaporization tower through small holes uniformly distributed under a pipeline of a raw material (anthracene oil) distributor (3), the flow of the inlet oil is regulated according to the liquid level at the bottom of the tower, coke oven gas is metered by the flow of a pore plate, the coke oven gas is preheated to about 360 ℃ by the waste heat of a production line, the coke oven gas uniformly enters different depths of an oil layer of the vaporization tower from three directions through a coke oven gas distributor (2), the coke oven gas directly enters the oil layer in the tower to play a role of stirring for the oil in the tower, the oil in the tower realizes heat exchange in two modes of convection and conduction, the oil in the tower is rapidly and stably gasified, the oil in the tower bottom is pumped out by a tower bottom oil heating circulating pump (8) and is sent to an outer circulating heater (7) for heating the tower bottom oil, and the rotating speed of the tower bottom oil heating circulating pump (8) is regulated by frequency conversion, namely, the circulation volume is controlled, the temperature of the tower bottom oil is controlled within the process requirement range, a part of oil is continuously and stably discharged to an asphalt tank (10) through an adjusting valve on an outlet branch pipe of a tower bottom oil heating circulating pump (8), the phenomenon that the tower bottom oil is concentrated and coked by asphalt to influence the normal work of a vaporization tower is avoided, the oil inlet flow is adjusted to be 500 +/-50 kg/h, the tower bottom temperature is 320 +/-2 ℃, and the coke oven gas flow is 450 +/-20 Nm³H, controlling the temperature of the coke oven gas to be 360 +/-2 ℃ and the liquid level at the bottom of the tower to be 1300 +/-20 mm through the temperature of a fire house,the pressure at the top of the tower is controlled to be 0.7 +/-0.05 kpa, and the iodine absorption value of the produced product is 75 +/-2 g/kg, and the oil absorption value is 88 +/-0.510^-5m³The color intensity is 107 +/-0.5, and the blackness is 42 +/-0.5, namely the gas mixing standard of the pigment carbon black.

Example 2

The raw material oil pump pumps out the anthracene oil from the oil storage tank, the anthracene oil is preheated to 250 ℃ by the heat exchanger, the anthracene oil enters the vaporization tower through small holes uniformly distributed under a pipeline of a raw material (anthracene oil) distributor (3), the flow of the inlet oil is adjusted according to the liquid level at the bottom of the tower, the coke oven gas is measured by the flow of a pore plate, the coke oven gas is preheated to 360 ℃ by the waste heat of a production line, the coke oven gas uniformly enters different depths of an oil layer of the vaporization tower from three directions by a coke oven gas distributor (2), the coke oven gas directly enters the oil layer in the tower to play a role of pumping the oil in the tower, the oil in the tower realizes convection and heat conduction, the oil in the tower is rapidly and stably gasified, the oil at the bottom of the tower is pumped out by a tower bottom oil heating circulating pump (8) and is sent to an outer circulating heater (7) for heating the tower bottom oil, the rotating speed of the tower bottom oil heating circulating pump (8) is adjusted by frequency conversion, namely the control of the circulating amount, the temperature of the tower bottom oil is controlled within the process requirement range, a part of oil is continuously and stably discharged to an asphalt tank (10) through an adjusting valve on an outlet branch pipe of a tower bottom oil heating circulating pump (8), the phenomenon that the tower bottom oil asphalt is concentrated and coked to influence the normal work of a vaporization tower is avoided, the flow of the inlet oil is adjusted to be 450 +/-50 kg/h, the temperature of the tower bottom is 300 +/-1 ℃, and the flow of coke oven gas is 650 +/-20 Nm³The temperature of the coke oven gas is controlled to be 360 +/-2 ℃, the liquid level at the bottom of the tower is controlled to be 1000 +/-20 mm, the pressure at the top of the tower is controlled to be 0.5 +/-0.05 kpa, and the iodine absorption value of the produced product is 105 +/-2 g/kg, the oil absorption value is 86 +/-0.510^-5m³The color intensity is 117 +/-0.5, and the blackness is 37 +/-0.5, namely the standard of pigment carbon black C611.

The quality and consumption of the product produced by the invention are compared with those of the original vaporization kettle

Vaporization kettle of vaporization tower

Iodine absorption value and oil absorption value tinting strength blackness gas consumption yield of variety

C611 105±2 86±0.5 117±0.5 37±0.5 3400 190 115±5 93±3 114±1 39±0.5 3800 140

75 +/-288 +/-0.5107 +/-0.542 +/-0.5220022085 +/-595 +/-3104 +/-144 +/-0.52700200 of mixed gas

The data show that the carbon black produced by the vaporization tower has small quality fluctuation range, more stable quality, higher coloring strength, blackness and lower consumption, and the carbon black produced by the vaporization tower has low oil absorption value and the liquidity is greatly superior to that of a vaporization kettle product.

The foregoing is a detailed description of the present invention, and it is not intended that the present invention be limited to the specific embodiments described herein, and that various changes, modifications, alterations, and substitutions may be made by those skilled in the art without departing from the spirit and scope of the invention.