CN217188756U

CN217188756U - Utilize formaldehyde to absorb ammonia and improve device of urotropine output

Info

Publication number: CN217188756U
Application number: CN202220503819.XU
Authority: CN
Inventors: 张建新; 赵永强; 席红卫
Original assignee: Shanxi Huafengyang Chemical Co ltd
Current assignee: Shanxi Huafengyang Chemical Co ltd
Priority date: 2022-03-09
Filing date: 2022-03-09
Publication date: 2022-08-16
Anticipated expiration: 2032-03-09

Abstract

The utility model discloses an utilize formaldehyde to absorb ammonia and improve device of urotropine output, including ammonia absorption tower, formaldehyde absorption tower and mother liquor circulation groove, the sub-unit connection of ammonia absorption tower has the ammonia intake pipe, install the vacuum pump in the ammonia intake pipe, the formaldehyde absorption tower pass through formaldehyde pipeline with the ammonia absorption tower is connected, the lower part of ammonia absorption tower is equipped with the drain pipe, the other end of drain pipe is connected with circulating pipe and mother liquor conveyer pipe respectively, the other end of circulating pipe with the upper portion of ammonia absorption tower is connected, install the heat exchanger on the circulating pipe, the other end and the mother liquor circulation groove of mother liquor conveyer pipe are connected, the mother liquor circulation groove passes through the conveying pipe and is connected with the ammoniation reactor, install the delivery pump on the conveying pipe. The utility model discloses utilize formaldehyde to absorb the ammonia and obtain the mother liquor of production urotropine to increase urotropine output, increase profit.

Description

Utilize formaldehyde to absorb ammonia and improve device of urotropine output

Technical Field

The utility model relates to a urotropine production technical field especially relates to an utilize formaldehyde to absorb ammonia and improve urotropine output's device.

Background

Urotropine, also known as hexamethylenetetramine, is one of downstream products of formaldehyde, is mainly used as a curing agent of resin and plastics, a catalyst and a foaming agent of aminoplast, an accelerator of rubber vulcanization, an antishrinking agent of textiles and the like, and has wide application in chemical industry and pharmaceutical industry.

At present, part of formaldehyde gas at a formaldehyde oxidation furnace enters an ammoniation reactor to produce urotropine, and part of the formaldehyde gas enters a formaldehyde absorption tower to produce formaldehyde. Because the existing formaldehyde has bad market and negative profit, the formaldehyde in the storage tank can not be sold for a long time, and the polymerization phenomenon is generated.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing an utilize formaldehyde to absorb ammonia and improve the device of urotropine output, utilize formaldehyde to absorb ammonia and obtain the mother liquor of producing urotropine to increase urotropine output, increase profit.

In order to achieve the purpose of the utility model, the technical proposal is as follows:

the utility model provides an utilize formaldehyde to absorb ammonia and improve device of urotropine output, includes ammonia absorption tower, formaldehyde absorption tower and mother liquor circulation groove, the sub-unit connection of ammonia absorption tower has the ammonia intake pipe, install the vacuum pump in the ammonia intake pipe, the formaldehyde absorption tower pass through formaldehyde pipeline with the ammonia absorption tower is connected, the lower part of ammonia absorption tower is equipped with the drain pipe, the other end of drain pipe is connected with circulating pipe and mother liquor conveyer pipe respectively, the other end of circulating pipe with the upper portion of ammonia absorption tower is connected, install the heat exchanger on the circulating pipe, the other end and the mother liquor circulation groove of mother liquor conveyer pipe are connected, the mother liquor circulation groove passes through the conveying pipe and is connected with the ammoniation reactor, install the delivery pump on the conveying pipe.

As a further improvement of the utility model, the heat exchanger is a plate heat exchanger.

As the further improvement of the utility model, install pH detector and control valve in proper order along the direction that the material was carried on the mother liquor conveyer pipe, when the pH value that the pH detector detected was 7.5-8, the mother liquor with the absorption in the ammonia absorption tower was extracted to the mother liquor circulation groove.

As a further improvement, be equipped with spray assembly in the ammonia absorption tower, spray assembly is including fixing the support on the ammonia absorption tower inner wall, be provided with the shower on the support, the shower is circular coil pipe, the entry end of shower with formaldehyde pipeline connects, the bottom of shower is equipped with a plurality of showers.

As a further improvement of the utility model, the spray header is an atomizing spray head.

The utility model has the advantages that: the utility model discloses squeeze into the ammonia absorption tower with the interior rare formaldehyde aqueous solution that contains 3-5% of formaldehyde absorption tower, spray the absorption with the ammonia that the vacuum pump sent, when pH value arrived 7.5-8, the mother liquor that absorbs in the ammonia absorption tower was extracted to the mother liquor circulation groove, then was sent to ammoniation reactor production urotroping and uses, supplyes 3-5% of rare formaldehyde aqueous solution circulation use after the extraction.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:

fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of the spray assembly of the present invention.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

In order to make the technical solutions of the present application better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

As shown in figure 1-2, the device for improving the yield of urotropine by absorbing ammonia with formaldehyde comprises an ammonia absorption tower 1, a formaldehyde absorption tower 2 and a mother liquor circulating tank 3, the lower part of the ammonia absorption tower 1 is connected with an ammonia gas inlet pipe 4, a vacuum pump 5 is arranged on the ammonia gas inlet pipe 4, the formaldehyde absorption tower 2 is connected with the ammonia absorption tower 1 through a formaldehyde delivery pipeline 6, a liquid outlet pipe 7 is arranged at the lower part of the ammonia absorption tower 1, the other end of the liquid outlet pipe 7 is respectively connected with a circulating pipe 8 and a mother liquid delivery pipe 9, the other end of the circulating pipe 8 is connected with the upper part of the ammonia absorption tower 1, a heat exchanger 10 is arranged on the circulating pipe 8, the other end of the mother liquor conveying pipe 9 is connected with the mother liquor circulating groove 3, the mother liquor circulating tank 3 is connected with an ammoniation reactor 12 through a feeding pipe 11, and a feeding pump 13 is installed on the feeding pipe 11.

The heat exchanger 10 is a plate heat exchanger.

And a pH detector 14 and a control valve 15 are sequentially arranged on the mother liquid conveying pipe 9 along the material conveying direction, and when the pH value detected by the pH detector 14 is 7.5-8, the mother liquid absorbed in the ammonia gas absorption tower 1 is extracted to the mother liquid circulating tank 3.

Be equipped with spray set 16 in the ammonia absorption tower 1, spray set 16 is including fixing the support 17 on ammonia absorption tower 1 inner wall, be provided with shower 18 on the support 17, shower 18 is circular coil pipe, the entry end of shower 18 with formaldehyde pipeline 6 is connected, the bottom of shower 18 is equipped with a plurality of shower heads 19.

The spray header 19 is an atomizing spray header.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement, component separation or combination made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an utilize formaldehyde to absorb ammonia and improve device of urotropine output which characterized in that: including ammonia absorption tower, formaldehyde absorption tower and mother liquor circulation groove, the sub-unit connection of ammonia absorption tower has the ammonia intake pipe, install the vacuum pump in the ammonia intake pipe, the formaldehyde absorption tower pass through formaldehyde pipeline with the ammonia absorption tower is connected, the lower part of ammonia absorption tower is equipped with the drain pipe, the other end of drain pipe is connected with circulating pipe and mother liquor conveyer pipe respectively, the other end of circulating pipe with the upper portion of ammonia absorption tower is connected, install the heat exchanger on the circulating pipe, the other end and the mother liquor circulation groove of mother liquor conveyer pipe are connected, the mother liquor circulation groove passes through the conveying pipe and is connected with the ammoniation reactor, install the delivery pump on the conveying pipe.

2. The device for increasing the yield of urotropine by absorbing ammonia gas with formaldehyde as claimed in claim 1, wherein: the heat exchanger is a plate heat exchanger.

3. The apparatus of claim 1, wherein the apparatus for absorbing ammonia gas with formaldehyde to increase the yield of urotropine comprises: and a pH detector and a control valve are sequentially arranged on the mother liquor conveying pipe along the material conveying direction.

4. The apparatus of claim 1, wherein the apparatus for absorbing ammonia gas with formaldehyde to increase the yield of urotropine comprises: the ammonia absorption tower is characterized in that a spraying assembly is arranged in the ammonia absorption tower and comprises a support fixed on the inner wall of the ammonia absorption tower, a spraying pipe is arranged on the support and is a circular coil pipe, the inlet end of the spraying pipe is connected with a formaldehyde conveying pipeline, and a plurality of spraying heads are arranged at the bottom of the spraying pipe.

5. The apparatus of claim 4, wherein the apparatus for absorbing ammonia gas with formaldehyde to increase the yield of urotropine comprises: the spray header is an atomizing spray head.