CN202538743U - Oxygenizer for producing formaldehyde by using silver method - Google Patents

Abstract

The utility model discloses an oxygenizer for producing formaldehyde by using a silver method, which comprises an oxygenizer body; and a mixed gas outlet is formed in the oxygenizer body. The oxygenizer is characterized in that the inner bottom of the oxygenizer body is an inclined bottom; and the inclined bottom is connected with the mixed gas outlet. Through the adoption of the technical scheme, the oxygenizer has the advantages that as the V-shaped bottom of an oxygenizer in the prior art is transformed into the inclined bottom, materials at the bottom of the oxygenizer are ensured to freely enter an adsorption tower, so that the retention of the high-concentration formaldehyde at the bottom of the oxygenizer is avoided, and the possibility of forming polyformaldehyde and paraformaldehyde is eliminated; the phenomena that the polyformaldehyde and the paraformaldehyde are liable to form at the bottom of the existing oxygenizer can be effectively eliminated; and the running period of a single batch silver catalyst is prolonged, the running load of the oxygenizer is improved, and the running consumption of the oxygenizer is reduced.

Description

A kind of silver-colored method is produced the oxidator of formaldehyde

Technical field

The utility model relates to the Formaldehyde Production field, and particularly a kind of silver-colored method is produced the oxidator of formaldehyde.

Background technology

Catalyst for electrolytic silver adds in the high-concentration formaldehyde production technology of tail gas round-robin method (50% formaldehyde); Whole technical process is material benzenemethanol and Air mixing gas; Under the effect of silver catalyst; In oxidator, carry out oxidative dehydrogenation simultaneously, produce formaldehyde gas, obtain finished product formaldehyde through absorption again.

In the prior art, catalyst for electrolytic silver adds the tail gas round-robin method and produces oxidator bottom design in the formaldehyde by conventional design of pressure vessels, adopts the V-type bottom design, and below, the blowdown access hole is set.This kind oxidizer design is science not very, and the chemical reaction that this technology is mainly carried out is in the useless pot section of oxidator, and methyl alcohol gas generates high-concentration formaldehyde gas through redox reaction; The formaldehyde mist drops to 150 degree through temperature after the twice condensation by 650 degree in oxidator, this process has the formaldehyde gas condensation and generates and to be higher than 50% formalin and to get into absorption system with air-flow by the bottom, and absorption system adopts the low concentration formaldehyde aqueous solution to absorb formaldehyde gas and obtains 50% formalin; This process oxidator bottom high-concentration formaldehyde very easily polymerization generates solid matters such as polyformaldehyde and paraformaldehyde; Remain in oxidator V-type bottom, rather than get into absorption system with air-flow, so long period production; The bottom polymer can be cumulative; Finally cause whole oxidator bottom polymerization serious, influence gas phase and normally get into absorption system, cause the oxidator SR to fall and rise comparatively fast; Exist device load and production cycle lower, the device operation consumes high deficiency.

Summary of the invention

To the problems referred to above; The purpose of the utility model is to provide a kind of raising can effectively eliminate easy polyformaldehyde and the paraformaldehyde phenomenon of forming in former oxidator bottom; And improve the single batch of silver catalyst cycle of operation; Improve the device operating load, the silver-colored method that reduces device operation consumption is produced the oxidator of formaldehyde.

For achieving the above object; The technical scheme that the utility model proposed is: a kind of silver-colored method is produced the oxidator of formaldehyde; Comprise the oxidator body; Described oxidator body is provided with a mixed gas outlet, it is characterized in that: described oxidator body inner bottom part is the bottom, inclined-plane, and bottom, described inclined-plane links to each other with mixed gas outlet.

Adopt technique scheme; The utility model transform oxidator V-type of the prior art bottom as the inclined-plane bottom; Guarantee that oxidator bottom material freely gets into the absorption tower, thereby avoid high-concentration formaldehyde liquid to be detained, eliminate the possibility that polyformaldehyde and paraformaldehyde form in the oxidator bottom; Have raising and can effectively eliminate easy polyformaldehyde and the paraformaldehyde phenomenon of forming in former oxidator bottom; And improve the single batch of silver catalyst cycle of operation, improve the device operating load, reduce advantages such as device operation consumption.

Description of drawings

Fig. 1 is the basic block diagram of prior art oxidator;

Fig. 2 is the basic block diagram of the described oxidator of the utility model;

1. bottom oxidator body, 11. gas feeds, 12. oxidator seal head sections, 13. useless pot heat exchanging segments, 14. secondary heat exchange sections, 15. mixed gas outlets, 16.V type bottom, 17. blowdown access holes, 18. inclined-planes.

The specific embodiment

Below in conjunction with the accompanying drawing and the specific embodiment, the utility model is further specified.

As shown in Figure 1, the oxidator body of prior art comprises gas feed 11, oxidator seal head section 12, useless pot heat exchanging segment 13, secondary heat exchange section 14, mixed gas outlet 15, V-type bottom 16, and the V-type bottom has blowdown access hole 17.Of Fig. 2, the difference of the described oxidator of the utility model is, transform the V-type bottom 16 of prior art as bottom, inclined-plane 18, and bottom, inclined-plane 18 links to each other with mixed gas outlet 15

When specifically practical, being reflected in the oxidator of methyl alcohol and air carried out in the Formaldehyde Production, and quaternary mist methyl alcohol, air, steam, tail gas are through after filtering; Get into reactor head from the oxidator gas feed; Carry out redox reaction with airborne oxygen under the effect of methyl alcohol silver catalyst in oxidator, transform and generate formaldehyde, methyl alcohol also carries out dehydrogenation reaction under the effect of silver catalyst simultaneously; Decompose and produce formaldehyde; The formaldehyde mist that becomes comes out to get into to absorb operation from the oxidator gas vent after the useless pot section heat exchange of oxidator and two sections heat exchange coolings, the utility model is transformed into the bottom, inclined-plane with the V-type bottom of oxidator, guarantees that oxidator bottom material freely gets into the absorption tower; Thereby avoid high-concentration formaldehyde liquid to be detained, eliminate the possibility that polyformaldehyde and paraformaldehyde form in the oxidator bottom.

Although specifically show and introduced the utility model in conjunction with preferred embodiment; But the those skilled in the art should be understood that; In the spirit and scope of the utility model that does not break away from appended claims and limited; In form with on the details the utility model is made various variations, be the protection domain of the utility model.

Claims (1)

1. the oxidator of a silver-colored method production formaldehyde comprises the oxidator body, and described oxidator body is provided with a mixed gas outlet, it is characterized in that: described oxidator body inner bottom part is the bottom, inclined-plane, and bottom, described inclined-plane links to each other with mixed gas outlet.

Images