Acid making equipment and steam boiler boiling method

Abstract

The invention discloses acid making equipment and a steam boiler boiling method, and relates to the technical field of sulfuric acid preparation. The acid making equipment comprises a waste heat boiler, a converter and a condenser. A steam pocket is arranged above the waste heat boiler, the waste heat boiler is connected with a start-up steam pipe, and the start-up steam pipe is provided with a steam valve; a catalyst, an inter-bed cooler and a process gas cooler are arranged in the converter, one end of the converter is communicated with the waste heat boiler, the inter-bed cooler is communicated with the top of the steam pocket, and the process gas cooler is communicated with the bottom of the steam pocket; and the condenser is communicated with the bottom of the converter. The acid making equipment can ensure that the whole system has a relatively high heating rate, and also can accurately control the heating rate of the process gas cooler, so that the condenser is protected.

Description

technical field [0001] The invention relates to the technical field of sulfuric acid preparation, in particular to an acid-making equipment and a steam boiler method. Background technique [0002] Sulfuric acid (H 2 SO 4 ) is an important commercial chemical mainly used in the production of fertilizers, but also in the production of viscose fibers, pigments, in batteries, in the metallurgical industry and in the refining industry. Before the acid-making process, it is necessary to use steam to boil the furnace to prevent the water vapor generated during ignition from condensing on the catalyst, which will cause the catalyst to become pulverized and fail, and also increase the resistance of the catalytic layer; another reason is the small amount of SO generated. 2 convert to SO 3 , and will eventually condense on the equipment, causing equipment corrosion. [0003] In the existing boiler boiler method, start-up steam is usually introduced at the bottom of the waste heat b...

AI Technical Summary

Problems solved by technology

Before the acid making process, it is necessary to use steam to cook the furnace to prevent the water vapor generated during ignition from condensing on the catalyst, causing the catalyst to be pulverized and invalid, and also to increase the resistance of the catalytic layer; another reason is the small amount of SO produced 2 converted to SO 3 , will eventually condense on the equipment, causing equipment corrosion

[0003] The existing boiler cooking method is usually to introduce start-up steam at the bottom of the waste heat boiler to heat the acid making equipment. At the same time, in order to prevent the process gas cooler from heating up too slowly, it is also necessary to introduce start-up steam at the process gas cooler, which may easily lead to process gas cooling. The speed of temperature rise at the condenser is difficult to control. If the temperature rise exceeds 5°C / h, the acid protective lining in the condenser may be damaged, resulting in a production accident that stops production

[0004] In view of the above problems, it is necessary to develop an acid making equipment and a steam boiler method to solve the problem that the existing boiler method is difficult to control the heating rate

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