CN217356854U

CN217356854U - Waste heat utilization device of oxidizer

Info

Publication number: CN217356854U
Application number: CN202220782053.3U
Authority: CN
Inventors: 谷加进; 周自然; 江向阳
Original assignee: Liuyang Kingang Chemical Industry Co ltd
Current assignee: Liuyang Kingang Chemical Industry Co ltd
Priority date: 2022-04-07
Filing date: 2022-04-07
Publication date: 2022-09-02
Anticipated expiration: 2032-04-07

Abstract

The utility model discloses an oxidizer waste heat utilization device, which comprises a tank body, wherein a methanol inlet pipe is arranged at the top of the tank body, a catalyst is arranged below the methanol inlet pipe, a quenching heat exchanger is arranged below the catalyst, and a cooling heat exchanger is arranged below the quenching heat exchanger; a formaldehyde exhaust pipe is arranged at the bottom of the tank body; a preheating heat exchanger is arranged on the formaldehyde exhaust pipe; an ignition hole is formed above the catalytic converter; the bottom of the tank body is provided with a blow-off pipe, the utility model aims to provide an oxidizer waste heat utilization device, which can make full use of waste heat in formaldehyde gas.

Description

Oxidizer waste heat utilization device

Technical Field

The utility model belongs to the technical field of the oxidation equipment, specifically be an oxidizer waste heat utilization equipment.

Background

The production method of industrial formaldehyde comprises a silver method and an iron-molybdenum method, and the former method has the advantages of low investment, low power consumption and low production cost and occupies a leading position in the domestic formaldehyde production. The basic process for producing formaldehyde by the silver method comprises the following steps: the methanol gas, the air and the ingredient steam are mixed and then enter a reactor, and the mixed gas reacts under the action of a silver catalyst to generate formaldehyde gas; the formaldehyde gas that produces is after cooling twice, and the pipeline is leading-in absorbs in the absorption tower, and the current is generally direct lets in the formaldehyde gas absorption tower in absorbing, and this just leads to the inside surplus heat of formaldehyde gas can not by make full use of.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above problem, provide an oxidation ware waste heat utilization equipment, waste heat in can make full use of formaldehyde gas.

In order to realize the above purpose, the utility model adopts the technical scheme that: a waste heat utilization device of an oxidizer comprises a tank body, wherein a methanol inlet pipe is arranged at the top of the tank body, a catalyst is arranged below the methanol inlet pipe, a quenching heat exchanger is arranged below the catalyst, and a cooling heat exchanger is arranged below the quenching heat exchanger; a formaldehyde exhaust pipe is arranged at the bottom of the tank body; a preheating heat exchanger is arranged on the formaldehyde exhaust pipe; an ignition hole is formed above the catalytic converter; and a sewage discharge pipe is arranged at the bottom of the tank body.

Further, the quenching heat exchanger comprises a shell, and a communicating pipe is vertically arranged on the shell; the top of the shell is provided with a hot water outlet and a steam outlet; the hot water outlet is communicated with a hot water outlet pipe, and the steam outlet is communicated with a steam pipe; the bottom of the shell is provided with a water inlet which is communicated with a rapid cooling water inlet pipe.

Further, the length of the hot water outlet is greater than that of the steam outlet, so that the hot water outlet is positioned below the steam outlet.

Furthermore, fins are arranged on the inner side wall of the communicating pipe.

Furthermore, a cooling water inlet pipe and a cooling water discharge pipe are arranged on the cooling heat exchanger, and the cooling water discharge pipe is communicated with the rapid cooling water inlet pipe.

Further, a coil pipe is arranged in the preheating heat exchanger, heat exchange fins are arranged on the coil pipe, a formaldehyde gas inlet is formed in the left end of the preheating heat exchanger, and a formaldehyde gas outlet is formed in the right end of the preheating heat exchanger; the right end of the coil pipe is provided with a heat exchanger water inlet pipe, and the left end of the coil pipe is provided with a heat exchanger water outlet pipe.

Further, a superheater is arranged on the methanol inlet pipe.

Further, a filter screen is arranged below the catalyst.

The utility model has the advantages that: the utility model provides an oxidizer waste heat utilization equipment, waste heat in can make full use of formaldehyde gas.

1. The utility model is provided with a quenching heat exchanger and a cooling heat exchanger inside the tank body, which can rapidly cool the generated formaldehyde gas, and is provided with a preheating heat exchanger on the formaldehyde exhaust pipe, which can heat the water in the preheating heat exchanger, thereby improving the waste heat utilization efficiency of the water formaldehyde gas, and simultaneously leading the heated water in the preheating heat exchanger into the steam packet, so that the water in the steam packet can be rapidly heated to form steam; the steam output efficiency is improved;

2. the utility model adopts the arrangement of the hot water outlet and the steam outlet to separately discharge the steam and the hot water generated in the quenching heat exchanger, thereby avoiding the discharge of the hot water and the steam from the same pipeline, supplying the generated steam into the steam bag, and supplying the heat to the evaporator by the hot water generated at the same time, thereby achieving the full utilization of the product;

3. the arrangement of the coil pipe of the utility model can make full use of the waste heat of the gas exhausted from the formaldehyde exhaust pipe; and the arrangement of the heat exchange fins ensures that the water body in the coil pipe can fully absorb the heat of the exhaust gas at the formaldehyde exhaust pipe.

Drawings

Fig. 1 is a schematic view of the structure of the present invention.

Fig. 2 is a schematic view of a part a of fig. 1.

The text labels in the figures are represented as: 1. a tank body; 2. a quench heat exchanger; 3. cooling the heat exchanger; 4. preheating a heat exchanger; 5. a catalyst; 6. a superheater; 11. a methanol inlet pipe; 12. a formaldehyde exhaust pipe; 13. an ignition hole; 14. a sewage discharge pipe; 21. a quenching water inlet pipe; 22. a hot water outlet pipe; 23. a steam pipe; 24. a hot water outlet; 25. a steam outlet; 26. a fin; 27. a communicating pipe; 28. a water inlet; 31. a cooling water inlet pipe; 32. a cooling water discharge pipe; 41. a coil pipe; 42. a formaldehyde gas inlet; 43. a formaldehyde gas discharge port; 411. heat exchange fins; 412. a heat exchanger water inlet pipe; 413. a water outlet pipe of the heat exchanger; 51. and (5) filtering the screen.

Detailed Description

In order to make the technical solution of the present invention better understood, the present invention is described in detail below with reference to the accompanying drawings, and the description of the present invention is only exemplary and explanatory, and should not be construed as limiting the scope of the present invention.

As shown in fig. 1-2, the specific structure of the present invention is: a waste heat utilization device of an oxidizer comprises a tank body 1, wherein a methanol inlet pipe 11 is arranged at the top of the tank body 1, a catalyst 5 is arranged below the methanol inlet pipe 11, a quenching heat exchanger 2 is arranged below the catalyst 5, and a cooling heat exchanger 3 is arranged below the quenching heat exchanger 2; a formaldehyde exhaust pipe 12 is arranged at the bottom of the tank body 1; a preheating heat exchanger 4 is arranged on the formaldehyde exhaust pipe 12, and a water outlet of the preheating heat exchanger 4 is connected with a steam packet on the tail gas treatment tower; an ignition hole 13 is formed above the catalytic converter 5; a sewage discharge pipe 14 is arranged at the bottom of the tank body 1; the rapid cooling heat exchanger 2 and the cooling heat exchanger 3 are arranged in the tank body 1, so that the generated formaldehyde gas can be rapidly cooled, the preheating heat exchanger 4 is arranged on the formaldehyde exhaust pipe 12, so that the water in the preheating heat exchanger 4 can be heated, the waste heat utilization efficiency of the water formaldehyde gas is improved, and meanwhile, the heated water in the preheating heat exchanger 4 is introduced into the steam packet, so that the water in the steam packet can be rapidly heated to form steam; the steam output efficiency is improved.

Preferably, the quenching heat exchanger 2 comprises a shell, and a communicating pipe 27 is vertically arranged on the shell; the top of the shell is provided with a hot water outlet 24 and a steam outlet 25; the hot water outlet 24 is communicated with the hot water outlet pipe 22, and the steam outlet 25 is communicated with the steam pipe 23; the bottom of the shell is provided with a water inlet 28, and the water inlet 28 is communicated with the rapid cooling water inlet pipe 21.

Preferably, the hot water discharge port 24 has a length greater than that of the steam discharge port 25 such that the hot water discharge port 24 is positioned below the steam discharge port 25.

Preferably, a fin 26 is arranged on the inner side wall of the communicating pipe 27; the arrangement of the hot water outlet 24 and the steam outlet 25 can separately discharge the steam and the hot water generated in the rapid cooling heat exchanger 2, so that the hot water and the steam are prevented from being discharged from the same pipeline, the generated steam can be supplied to a steam packet, and the generated hot water can supply heat to an evaporator, thereby achieving the purpose of fully utilizing the steam and the high-temperature hot water.

Preferably, the cooling heat exchanger 3 is provided with a cooling water inlet pipe 31 and a cooling water discharge pipe 32, and the cooling water discharge pipe 32 is communicated with the rapid cooling water inlet pipe 21; the cooling heat exchanger 3 is communicated with the quenching heat exchanger 2 through the cooling water drainage pipe 32 and the quenching water inlet pipe 21, so that the utilization efficiency of heat in the whole oxidizer can be improved.

Preferably, a coil pipe 41 is arranged inside the preheating heat exchanger 4, heat exchange fins 411 are arranged on the coil pipe 41, a formaldehyde gas inlet 42 is arranged at the left end of the preheating heat exchanger 4, and a formaldehyde gas outlet 43 is arranged at the right end of the preheating heat exchanger; a heat exchanger water inlet pipe 412 is arranged at the right end of the coil pipe 41, and a heat exchanger water outlet pipe 413 is arranged at the left end of the coil pipe; the arrangement of the coil 41 enables the waste heat of the gas exhausted from the formaldehyde exhaust pipe 12 to be fully utilized; and the arrangement of the heat exchange fins 411 enables the water body in the coil pipe 41 to fully absorb the heat of the exhaust gas at the formaldehyde exhaust pipe 12.

Preferably, the methanol inlet pipe 11 is provided with a superheater 6; the arrangement of the superheater 6 can increase the temperature of the mixed gas entering the tank body 1, thereby improving the reaction efficiency.

Preferably, a filter screen 51 is arranged below the catalyst 5; the filter net 51 is provided to filter impurities contained in the mixed gas.

When the device is used specifically, mixed gas enters the tank body 1 through the methanol inlet pipe 11, meanwhile, the superheater 6 on the methanol inlet pipe 11 can heat the mixed gas in the methanol inlet pipe 11, and the mixed gas enters the tank body 1 and reacts under the action of the catalyst 5 and the ignition hole 13 to generate formaldehyde gas; the generated formaldehyde gas enters the cooling heat exchanger 3 for secondary cooling after being quenched by the quenching heat exchanger 2, and the generated impurities are discharged through the sewage discharge pipe 14; the formaldehyde gas after secondary cooling enters the preheating heat exchanger 4 through the formaldehyde exhaust pipe 12 to heat the water body in the preheating heat exchanger 4; the water heated in the preheating heat exchanger 4 is sent into a steam bag to be used as a raw material for generating steam; the heat utilization efficiency of the whole system is improved.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The principles and embodiments of the present invention have been explained herein using specific examples, which are presented only to assist in understanding the methods and their core concepts. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes can be made without departing from the principle of the present invention, and the above technical features can be combined in a proper manner; the application of these modifications, variations or combinations, or the application of the concepts and solutions of the present invention in other contexts without modification, is not intended to be considered as a limitation of the present invention.

Claims

1. The utility model provides an oxidizer waste heat utilization equipment which characterized in that: the device comprises a tank body (1), wherein a methanol inlet pipe (11) is arranged at the top of the tank body (1), a catalyst (5) is arranged below the methanol inlet pipe (11), a quenching heat exchanger (2) is arranged below the catalyst (5), and a cooling heat exchanger (3) is arranged below the quenching heat exchanger (2); a formaldehyde exhaust pipe (12) is arranged at the bottom of the tank body (1); a preheating heat exchanger (4) is arranged on the formaldehyde exhaust pipe (12); an ignition hole (13) is formed above the catalytic converter (5); a sewage discharge pipe (14) is arranged at the bottom of the tank body (1).

2. The oxidizer waste heat utilization device as set forth in claim 1, wherein: the quenching heat exchanger (2) comprises a shell, and a communicating pipe (27) is vertically arranged on the shell; the top of the shell is provided with a hot water outlet (24) and a steam outlet (25); the hot water outlet (24) is communicated with a hot water outlet pipe (22), and the steam outlet (25) is communicated with a steam pipe (23); the bottom of the shell is provided with a water inlet (28), and the water inlet (28) is communicated with the rapid cooling water inlet pipe (21).

3. The oxidizer waste heat utilization device as set forth in claim 2, wherein: the length of the hot water outlet (24) is longer than that of the steam outlet (25), so that the hot water outlet (24) is positioned below the steam outlet (25).

4. The oxidizer waste heat utilization device as set forth in claim 2, wherein: and fins (26) are arranged on the inner side wall of the communicating pipe (27).

5. The oxidizer waste heat utilization device as set forth in claim 2, wherein: the cooling heat exchanger (3) is provided with a cooling water inlet pipe (31) and a cooling water drain pipe (32), and the cooling water drain pipe (32) is communicated with a quenching water inlet pipe (21).

6. The oxidizer waste heat utilization device as set forth in claim 1, wherein: a coil pipe (41) is arranged in the preheating heat exchanger (4), heat exchange fins (411) are arranged on the coil pipe (41), a formaldehyde gas inlet (42) is arranged at the left end of the preheating heat exchanger (4), and a formaldehyde gas outlet (43) is arranged at the right end of the preheating heat exchanger; the right end of the coil pipe (41) is provided with a heat exchanger water inlet pipe (412), and the left end is provided with a heat exchanger water outlet pipe (413).

7. The oxidizer waste heat utilization device as set forth in claim 1, wherein: and a superheater (6) is arranged on the methanol inlet pipe (11).

8. The oxidizer waste heat utilization device as set forth in claim 1, wherein: a filter screen (51) is arranged below the catalyst (5).