CN1207183C

CN1207183C - Making method of heat storage spherical arch and heat storage ceramin tile in sulfuric acid conver for

Info

Publication number: CN1207183C
Application number: CN 02114003
Authority: CN
Inventors: 邓宗禹; 谢建国; 谢谦; 文云敬; 戴学成; 胡世勇; 王斌; 肖政庚; 徐志强
Original assignee: 邓宗禹
Priority date: 2002-03-22
Filing date: 2002-03-22
Publication date: 2005-06-22
Anticipated expiration: 2022-03-22
Also published as: CN1513754A

Abstract

The present invention relates to a heat-storage spherical arch for a sulfuric acid converter and manufacture of heat-storage porcelain tiles. A spherical arch (2) is stacked with heat-storage porcelain tiles (5). each heat-storage porcelain tile (5) is prepared from 20 to 70 wt% of alumina clay, 5 to 40 wt% Dongguan clay in Guangdong province, 5 to 40 wt% of Nankeng clay in Pingxiang, 1 to 5 wt% Henan bentonite and 5 to 20 wt% of petroleum coke, finished products of the heat storage porcelain tiles are produced by technologies of ball milling, sieving, iron removal, mud pressing, primary smelting, forming, drying in shade, baking, trimming, kiln entering, kiln firing, kiln discharge, test, row splicing, package, factory leaving, etc., and then, the heat-storage porcelain tiles are loaded in a converter and are spliced and stacked into a spherical arch by puddle bond. The heat-storage tile has the advantages of catalyst layer supporting action, low cost, etc. The product can be used in a sulfur matching converter and can also be used in other converters for supporting action, heat storage and heat preservation.

Description

Manufacturing method of heat storage spherical arch and heat storage ceramic tile of sulfuric acid converter

The invention relates to a sulfuric acid spherical arch and a manufacturing method of a heat storage ceramic tile.

SO produced during heavy-color refinery production₂The flue gas is usually used for producing sulfuric acid by the process of ； The reaction is carried out in a conversion unit, called a converter, by the action of a catalyst. The reaction section in the reactor is divided into 4 or 5 catalytic layers, the operation temperature is respectively 430-.

The insulation of the converter walls is usually accomplished by providing insulating materials, and the catalytic layers are not allowed to communicate with each other and exchange heat as little as possible, which would otherwise affect the SO₂Converted to SO₃SO that the final tail gas SO₂The content exceeds the standard, and the environment-friendly emission requirement cannot be met, thereby causing air pollution.

Therefore, the partition plates between the catalytic layers need to be sealed and insulated, and the design problem of the partition plates is also a design difficulty of the converter.

The prior converter partitions have been designed in many forms, mainly with expanded steel plates, steel plates plus refractory concrete, etc., these structures being in SO₂At higher concentrations, SO may be used₂When the concentration is lower, the electric furnace needs to be added for supplementing heat, and the support catalyst layer needs to be additionally provided with a support.

The invention aims to provide a heat storage spherical arch (2) of a converter and a manufacture method of a heat storage ceramic tile (5), wherein the heat storage spherical arch is a spherical arch structure built by special high-strength arch ceramic tiles with heat storage function.

The invention has the advantages that: the catalyst layer is supported while the sealing and the heat preservation are realized, SO that the converter can be supported in SO₂The heat balance of the system can be maintained under the condition of low concentration without supplementing heat by an electric heating furnace outside the system, so that the normal operation of production is ensured; at high temperatureHeat is accumulated during operation, and heat is released when the temperature is reduced, SO that the effective working temperature is maintained, and the SO is increased₂Conversion rate, energy conservation and cost reduction. Then leading the final tail gas SO of the sulfuric acid production₂The discharge can meet the requirement of environmental protection, simultaneously, the consumption of electric energy in production is greatly saved, the cost of sulfuric acid products is reduced, and the economic benefit of enterprises is improved.

The key point of the invention is that the interlayer of the converter is a sealed spherical arch built by heat storage ceramic tiles. The heat storage ceramic tile comprises the following components in parts by weight:

20-70% of bauxite, 5-40% of Guangdong Dongguan mud, 5-40% of Pingxiang south pit mud, 1-5% of Henan bentonite and 5-20% of petroleum coke.

The optimal weight components are as follows:

48% of bauxite, 20% of Guangdong Dongguan mud, 20% of Pingxiang south pit mud, 2% of Henan bentonite and 10% of petroleum coke.

The object of the invention is given by the following examples and figures:

FIG. 1 is a schematic diagram of a converter configuration; FIG. 2 is a schematic view of a heat storage tile; fig. 3 is a schematic perspective view of a heat storage dome in the converter.

In the figure: 1-catalyst layer of SO₂The catalyst layer of (3); 2-heat storage ball arch for heat preservation and heat storage; 3-gas chamber for SO₂Exchange to SO₃(ii) a 4-a support filler for supporting the catalyst layer;5-the heat-storage ceramic tile is used for building a ball arch; 6-converter.

The key point for realizing the heat storage spherical arch is to manufacture a high-strength and microporous arch brick, namely a heat storage ceramic tile, and the heat storage spherical arch is prepared by the following components in parts by weight: the heat-storage ceramic tile is produced by the processes of ball milling, sieving, iron removal, mud squeezing, rough smelting, forming, drying in the shade, baking, blank repairing, kiln entering, kiln firing, kiln discharging, inspection, arrangement, packaging and delivery and the like, and then the heat-storage ceramic tile is put into a converter, is bonded by daub and is laid into an arch shape.

Claims

1. A heat-storage ceramic tile is prepared from bauxite (20-70 wt.%), Guangdong Dongguan mud (5-40), Pingxiang Nanguo mud (5-40), Henan bentonite (1-5) and stone tar (5-20), and features high heat-storage performance, and high heat-storage performance.

2. The heat storage tile according to claim 1, wherein the raw materials comprise, by weight, 48% of bauxite, 20% of guang Dongguan mud, 20% of Pingxiang south China pit mud, 2% of Henan bentonite and 10% of petroleum coke.

3. A thermal storage dome for a sulfuric acid converter, characterized in that the thermal storage dome (2) is formed by the thermal storage tiles (5) of claim 1, which are cemented with cement and assembled into a dome shape.