CN212512675U

CN212512675U - Novel gas preheater

Info

Publication number: CN212512675U
Application number: CN202021275496.0U
Authority: CN
Inventors: 于振东; 段有龙; 曲斌; 于涛; 曹培城
Original assignee: Acre Coking and Refractory Engineering Consulting Corp MCC
Current assignee: Acre Coking and Refractory Engineering Consulting Corp MCC
Priority date: 2020-07-03
Filing date: 2020-07-03
Publication date: 2021-02-09
Anticipated expiration: 2030-07-03

Abstract

The utility model relates to a novel gas preheater, which comprises a gas preheater consisting of an upper seal head, an upper pipe box, a barrel, a lower pipe box, a lower seal head and a heat exchange pipe bundle, wherein the gas preheater also comprises an ultrasonic device; the ultrasonic device is arranged on one side of the upper tube plate; the coal gas inlet is arranged along the tangential direction of the lower tube box. The heat exchange tubes in the heat exchange tube bundle are corrugated tubes. The utility model discloses can effectively reduce heat exchange tube blocking phenomenon, prevent that the resistance from appearing rising in the coal gas preheater operation process.

Description

Novel gas preheater

Technical Field

The utility model relates to a coke oven gas purifies technical field, especially relates to a novel coal gas preheater.

Background

The coke oven gas purification process is provided with a plurality of procedures such as condensation blasting, electric tar precipitation, desulfurization and the like, and the purified coke oven gas enters an ammonium sulfate working section for deamination. In the deamination process, coal gas is heated to 55-65 ℃ through a coal gas preheater, then enters a spray saturator, and is sprayed with circulating mother liquor with the acidity of about 4% to absorb ammonia in the coal gas, so as to obtain ammonium sulfate crystals. The gas preheater is usually a single-pass tubular heat exchanger and is vertically installed, gas passes through a tube pass, steam passes through a shell pass, and the preheated gas enters the saturator from the top, so that the process system and the water balance in the saturator are ensured. After the coke-oven plant is put into operation for a period of time, the resistance of the gas preheater can gradually rise, so that the suction pressure of the air blower is influenced, and the whole chemical product recovery process and even the whole production system are disordered. The resistance of the gas preheater is increased mainly due to blockage of the heat exchange tube.

Disclosure of Invention

The utility model provides a novel coal gas preheater adopts multiple measures such as the bellows pipe for coal gas entry tangential feeding, heat exchange tube, increase ultrasonic device scale control and hinder dirty, effectively reduces heat exchange tube blocking phenomenon, prevents that the resistance from appearing rising in the coal gas preheater operation process.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a novel gas preheater comprises a gas preheater consisting of an upper end enclosure, an upper tube box, a cylinder body, a lower tube box, a lower end enclosure and a heat exchange tube bundle, wherein the upper end of the cylinder body is provided with an upper tube plate fixedly connected with the upper tube box, and the lower end of the cylinder body is provided with a lower tube plate fixedly connected with the lower tube box; a heat exchange tube bundle is arranged in the cylinder body; one side of the lower pipe box is provided with a gas inlet, the bottom of the lower pipe box is provided with a lower seal head, and the bottom of the lower seal head is provided with a condensed water outlet; the top of the upper pipe box is provided with an upper seal head, and the top of the upper seal head is provided with a coal gas outlet; the upper part of the cylinder body is provided with a steam inlet, and the lower part of the cylinder body is provided with a steam outlet; the coal gas preheater also comprises an ultrasonic device; the ultrasonic device is arranged on one side of the upper tube plate; the coal gas inlet is arranged along the tangential direction of the lower tube box.

The ultrasonic device comprises an ultrasonic generator, an ultrasonic transducer and an ultrasonic waveguide, wherein the ultrasonic waveguide is welded and fixed with the upper pipe plate, the ultrasonic transducer is connected with the ultrasonic waveguide through threads, and the ultrasonic generator is connected with the ultrasonic transducer through a high-frequency cable.

The heat exchange tubes in the heat exchange tube bundle are corrugated tubes, and a plurality of baffle plates are arranged in the cylinder along the height direction of the heat exchange tube bundle.

Spiral guide plates are respectively arranged above and below the lower channel box corresponding to the coal gas inlet.

The coal gas outlet vertically extends downwards to a certain distance in the upper seal head.

The upper pipe box is connected with the upper pipe plate, and the lower pipe box is connected with the lower pipe plate through bolts.

Compared with the prior art, the beneficial effects of the utility model are that:

1) removing part of impurities in the coal gas by centrifugal force in a mode of tangential feeding of a coal gas inlet;

2) the heat exchange tube adopts a corrugated tube to prevent impurities from attaching to the tube wall;

3) an ultrasonic device is additionally arranged to play a role in scale prevention and scale inhibition.

Drawings

Fig. 1 is a schematic structural diagram of a novel gas preheater of the utility model.

In the figure: 1. the device comprises a lower tube box 2, an upper tube box 3, an upper tube plate 4, a cylinder body 5, a heat exchange tube bundle 6, a baffle 7, an ultrasonic device 8, a lower tube plate 9, a steam inlet 10, a lower seal head 11, a coal gas inlet 12, a condensed water outlet 13, a baffle 14, bolts 15, a steam outlet 16, an upper seal head 17 and a coal gas outlet

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:

as shown in fig. 1, the novel gas preheater of the present invention comprises a gas preheater comprising an upper end enclosure 16, an upper pipe box 2, a cylinder 4, a lower pipe box 1, a lower end enclosure 10 and a heat exchange pipe bundle 5, wherein the upper end of the cylinder 4 is provided with an upper pipe plate 3 fixedly connected with the upper pipe box 2, and the lower end of the cylinder 4 is provided with a lower pipe plate 8 fixedly connected with the lower pipe box 1; a heat exchange tube bundle 5 is arranged in the cylinder 4; a coal gas inlet 11 is arranged on one side of the lower pipe box 1, a lower seal head 10 is arranged at the bottom of the lower pipe box 1, and a condensed water outlet 12 is arranged at the bottom of the lower seal head 10; an upper end enclosure 16 is arranged at the top of the upper pipe box 2, and a coal gas outlet 17 is arranged at the top of the upper end enclosure 16; the upper part of the cylinder 4 is provided with a steam inlet 9, and the lower part of the cylinder 4 is provided with a steam outlet 15; the coal gas preheater also comprises an ultrasonic device 7; the ultrasonic device 7 is arranged on one side of the upper tube plate 3; the gas inlet 11 is arranged along the tangential direction of the lower pipe box 1.

The ultrasonic device 7 is composed of an ultrasonic generator, an ultrasonic transducer and an ultrasonic waveguide, the ultrasonic waveguide is welded and fixed with the upper pipe plate, the ultrasonic transducer is connected with the ultrasonic waveguide through threads, and the ultrasonic generator is connected with the ultrasonic transducer through a high-frequency cable.

The heat exchange tubes in the heat exchange tube bundle 5 are corrugated tubes, and a plurality of baffle plates 6 are arranged in the cylinder 4 along the height direction of the heat exchange tube bundle 5.

Spiral guide plates 13 are respectively arranged above and below the coal gas inlet 11 in the lower tube box 1.

The gas outlet 17 extends vertically and downwardly into the upper head 16 for a distance.

The upper pipe box 2 and the upper pipe plate 3, and the lower pipe box 1 and the lower pipe plate 8 are connected through bolts.

In the novel coal gas preheater, coal gas inlet tangential feeding is adopted, and partial impurities in the coal gas are removed through centrifugal force.

The heat exchange tube adopts the corrugated tube, and the corrugated tube has unique design of wave crest and wave trough, thereby overcoming the defects of poor heat exchange capability, easy scaling and the like of the straight tube heat exchange tube. When the medium flows through the corrugated pipe, obvious disturbance is generated inside and outside the pipe, the thickening of a boundary layer is blocked, the heat transfer is enhanced, and the heat transfer efficiency is improved; the corrugated pipe has a special structural shape, can generate low-frequency micromotion under the action of a medium, has a strong self-cleaning effect and is not easy to scale; and has the function of automatic compensation of thermal stress without adding an expansion joint.

The ultrasonic antiscaling technology mainly utilizes the cavitation effect, activating effect, shearing effect and inhibiting effect of ultrasonic wave to make the scale forming matter produce a series of changes in physical form and chemical property under the action of ultrasonic field, so that the scale forming matter is dispersed and loosened without adhering to pipe wall and wall to form scale.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A novel gas preheater comprises a gas preheater consisting of an upper end enclosure, an upper tube box, a cylinder body, a lower tube box, a lower end enclosure and a heat exchange tube bundle, wherein the upper end of the cylinder body is provided with an upper tube plate fixedly connected with the upper tube box, and the lower end of the cylinder body is provided with a lower tube plate fixedly connected with the lower tube box; a heat exchange tube bundle is arranged in the cylinder body; one side of the lower pipe box is provided with a gas inlet, the bottom of the lower pipe box is provided with a lower seal head, and the bottom of the lower seal head is provided with a condensed water outlet; the top of the upper pipe box is provided with an upper seal head, and the top of the upper seal head is provided with a coal gas outlet; the upper part of the cylinder body is provided with a steam inlet, and the lower part of the cylinder body is provided with a steam outlet; the coal gas preheater is characterized by further comprising an ultrasonic device; the ultrasonic device is arranged on one side of the upper tube plate; the coal gas inlet is arranged along the tangential direction of the lower tube box.

2. The novel gas preheater as claimed in claim 1, wherein the ultrasonic device comprises an ultrasonic generator, an ultrasonic transducer and an ultrasonic waveguide, the ultrasonic waveguide is welded and fixed to the upper tube plate, the ultrasonic transducer is connected to the ultrasonic waveguide through a screw thread, and the ultrasonic generator is connected to the ultrasonic transducer through a high-frequency cable.

3. A novel gas preheater as claimed in claim 1, wherein the heat exchange tubes in the heat exchange tube bundle are corrugated tubes, and a plurality of baffles are arranged in the cylinder along the height direction of the heat exchange tube bundle.

4. A novel gas preheater as claimed in claim 1, wherein spiral deflectors are respectively arranged above and below the corresponding gas inlet in the lower tube box.

5. A novel gas preheater as claimed in claim 1, wherein said gas outlet extends vertically downwardly into the upper head a distance.

6. The novel gas preheater as claimed in claim 1, wherein the upper tube box is connected to the upper tube plate and the lower tube box is connected to the lower tube plate through bolts.