Jet arch for continuous fluidized reactor and gas-making fluidized reactor

Abstract

The invention relates to a jet arch for a continuous fluidized reactor and a gas-making fluidized reactor. The jet arch is characterized in that the jet arch is arranged in the fluidized reactor in a way that the fluidized reactor is partitioned into two cavities which are separately used for fuel combustion and material reaction; at least one strip-like jet flow channel for jetting combustion gas from a combustion cavity at a high speed to the reaction cavity is arranged on the surface of the jet arch; and the at least one jet flow channel in an integral distributing shape on the surface of the jet arch is arranged in a way that the jet combustion gas is high in flow rate in the central region and is low in flow rate in a peripheral region, so that high-temperature and high-flow rate combustion gas lifts the material in a suspended manner for reaction in the reaction cavity, and after the combustion gas is jet from the jet arch, external air is naturally inhaled from the bottom of the combustion cavity, and therefore, continuous production is realized. The fluidized reactor provided by the invention is high in gas-making efficiency and convenient to deslag, and can produce P2O5 directly from ores to prepare phosphoric acid through a one-step efficient high-temperature fluidized reaction.

Description

technical field [0001] The invention relates to a jet arch and a fluidization reactor for continuous fluidization reactors. The jet arch and fluidization reactor are especially suitable for high-efficiency high-temperature phosphorus pentoxide generation fluidization reactors, and are also suitable for utilizing fluidization Process and device for preparing phosphoric acid in chemical reactor. Background technique [0002] Phosphoric acid plays an important role in the national economy and is an intermediate raw material for the production of phosphate fertilizers and phosphates. Phosphoric acid and its downstream products are widely used in chemical, agricultural, pharmaceutical, food and electronics industries, and phosphorus pentoxide is the raw material for the production of phosphoric acid. [0003] At present, the production methods of phosphoric acid industry at home and abroad are divided into two process routes: wet method and thermal method. Wet-process phosphoric...

AI Technical Summary

Problems solved by technology

[0006] (1) The power of the dynamic wave is insufficient during the combustion process, and it is impossible to lift and suspend raw materials such as phosphate rock, phosphate rock reducing agent and fuel carbon in the reducing or weakly oxidizing atmosphere space;

[0007] (2) The combustion kinetic wave interface is not obvious, and the reduction space and the oxidation space cannot be relatively isolated;

[0008] (3) The molten substance flowing along the furnace wall during the combustion process is likely to cause blockage of the slag discharge hole, and continuous production cannot be realized

[0010] (1) There are 16 burners, which are divided into upper, middle and lower layers. The upper layer of burners is arranged in the oxidation zone, and the oxidation zone is an exothermic reaction, which does not need to be heated again. The burners are arranged in this area. The high temperature of 1650 ℃ can easily burn out the burner and cause waste of fuel;

[0011] (2) The position of the secondary air inlet pipe is unreasonable. The secondary air is used for the oxidation of phosphorus. The secondary air inlet pipe is arranged in the reduction area below the feed port, and it is difficult to form an oxidation area.

However, the invention still has the following defects: First, the reference document 2 needs to rely on continuous feeding of nitrogen to realize fluidization, so that the gas products in the reduction zone can be sent to the oxidation zone, and fluidization cannot be realized through the inherent structural features of the device, and the nitrogen gas access undoubtedly increases the cost

Secondly, in order to separate the reaction gas products P2 and CO generated in the reduction reaction zone from the blown particulate materials, a cyclone separator is specially installed on the top of the reduction zone, which increases the complexity of the device and also increases the cost.

Furthermore, the gas distributor of this patent has a planar structure. If more solid particles are deposited on the gas distributor, the planar gas distributor is difficult to bear its gravity and is prone to breakage, and the slag port is arranged on the gas distributor. Above, the gas distributor with a planar structure is not conducive to the smooth discharge of slag. Moreover, the power passing through the planar gas distributor during the combustion process is insufficient, so it is difficult to lift up the ore in the reduction reaction zone and evenly disperse it in the entire reduction zone, making Most of the incoming ore is deposited in the middle and lower part of the reduction reaction zone, the reduction effect is not ideal, and the incoming ore is easy to cause blockage to the gas distributor, affecting the continuous progress of the reaction

Finally, according to the description of the invention attached figure 2 or 3, the slag outlet is set above the gas distributor, which is not conducive to the smooth discharge of slag, and it is easy to accumulate on the gas distributor

Images