CN215842431U

CN215842431U - Flue type gas mixing reactor

Info

Publication number: CN215842431U
Application number: CN202122118348.9U
Authority: CN
Inventors: 王乾沩; 彭伟; 易作宏
Original assignee: Hunan Anpunuo Environmental Protection Technology Co ltd
Current assignee: Hunan Anpunuo Environmental Protection Technology Co ltd
Priority date: 2021-09-03
Filing date: 2021-09-03
Publication date: 2022-02-18
Anticipated expiration: 2031-09-03

Abstract

The utility model provides a flue-type gas mixing reactor which comprises a reactor body, wherein an outlet reducer is arranged at the upper end of the reactor body, an inlet reducer is arranged at the lower end of the reactor body, a central guide plate is arranged in the reactor body and comprises an inlet central guide plate and an outlet central guide plate, the inlet central guide plate is positioned below the outlet central guide plate, and an annular baffle is arranged between the inlet central guide plate and the outlet central guide plate. This scheme simple structure, design benefit, whole scheme does not have movable part, the trouble is few in the use, durable, through the setting of central guide plate and ring baffle, the effectual effect that improves SOx/NOx control makes the flue gas can realize with flue gas intensive mixing and reaction at this internal diversion of reactor, baffling, torrent, vortex etc. effect to realize the efficient and mix, improve reaction dwell time with economic means, reduction equipment and flue gas treatment cost.

Description

Flue type gas mixing reactor

Technical Field

The utility model relates to the technical field of air pollution treatment and environment-friendly equipment, in particular to a flue type gas mixing reactor which is used for dry desulfurization, denitration and the like of flue gas.

Background

The improvement work of flue gas desulfurization and denitration technology in China has been carried out for many years, but with the continuous increase of project breadth and deepening of depth, some new desulfurization and denitration technology and technical measures appear. Such as dry desulfurization of sodium bicarbonate powder, denitration of flue gas by selective catalytic reduction of urea solution sprayed in a flue, and the like. The new technologies and measures are suitable for small-scale desulfurization and denitrification projects or projects with low requirements on removal efficiency so as to save investment and operation cost. The technology and measures are to spray desulfurization and denitrification agents into the flue before a dust remover or a denitrification reactor, the agents can be solid powder or atomized solution, and the aim is to fully mix and chemically react the sprayed agents with flue gas so as to realize the aims of desulfurization and denitrification. How to achieve sufficient mixing and facilitate the reaction requires a specially designed flue mixing reactor, and the utility model is designed for the requirement.

Application number 201110058840.X discloses a boiler flue gas denitration system, but the system has a complex structure and high production cost, and is not beneficial to the use of small-sized desulfurization and denitration projects; application number 201610683689.1 discloses a method for desulfurization and denitration of flue gas and a device thereof, but the device adopts multi-level desulfurization, is inconvenient to use and affects the operation.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provide the flue-type gas mixing reactor which is simple in structure, convenient for reducing the production cost, convenient for small projects to use, capable of improving the desulfurization and denitrification effects and long in service life.

The technical scheme of the utility model is as follows: the utility model provides a flue type gas mixing reactor, includes the reactor body, and reactor body upper end is equipped with export reducer, and the lower extreme of reactor body is equipped with import reducer, this internal central guide plate that is equipped with of reactor, central guide plate include import center guide plate and export center guide board, and import center guide plate is located export center guide board's below, is equipped with ring baffle between import center guide plate and the export center guide board.

Further, the central baffles and the annular baffles may be staggered one or more times.

Furthermore, the inlet central guide plate and the outlet central guide plate are arranged on the same straight line, and the annular baffle plate is arranged on the inner wall of the reactor body.

Furthermore, the outer edge of the annular baffle plate is welded with the inner wall of the reactor body, a hole is formed in the center of the annular baffle plate, the hole is circular or rectangular, and the central point of the hole is superposed with the central point of the section of the reactor body.

Further, the central guide plate is a solid flat steel plate, and can also be a circular plate or a rectangular plate, or a conical steel plate structure with the cone top facing the air inlet direction, and can also be a circular bottom cone or a rectangular bottom cone.

Further, the center guide plate is installed in the reactor body through the section steel, the section steel is transversely provided with two ends which are welded on the inner wall of the reactor body, the center guide plate is welded and fixed on the section steel, and the center point of the center guide plate is coincided with the center point of the cross section of the mixing reactor body.

Furthermore, one or more medicament injection pipes are arranged on the inlet reducer.

Furthermore, the medicament spray pipe extends into the reactor body, the extension line of the medicament spray pipe is superposed with the central point of the inlet central guide plate, and the extending length of the medicament spray pipe is 50 to 70 percent of the distance from the inner wall point of the mixing reactor to the central point of the inlet central guide plate.

Furthermore, reinforcing ribs are arranged outside the reactor body and are made of profile steel.

Further, the cross section of the reactor body is circular or rectangular; the inner diameter of the reactor body is larger than that of the original flue.

The utility model has the following characteristics: this scheme simple structure, design benefit, whole scheme does not have movable part, the trouble is few in the use, durable, through the setting of central guide plate and ring baffle, the effectual effect that improves SOx/NOx control makes the flue gas can realize with flue gas intensive mixing and reaction at this internal diversion of reactor, baffling, torrent, vortex etc. effect to realize the efficient and mix, improve reaction dwell time with economic means, reduction equipment and flue gas treatment cost.

The detailed structure of the present invention will be further described with reference to the accompanying drawings and the detailed description.

Drawings

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

1-inlet reducer, 2-reactor body, 3-inlet central guide plate, 4-reinforcing rib, 5-annular baffle, 6-outlet central guide plate, 7-outlet reducer and 8-medicament injection pipe.

Detailed Description

Example one

As shown in figure 1: the utility model provides a flue type gas mixing reactor, includes

reactor body

2, 2 upper ends of reactor body are equipped with export reducer 7, and the lower extreme of reactor body 2 is equipped with import reducer 1, are equipped with central guide plate in the reactor body 2, and central guide plate includes import central guide plate 3 and export center guide board, and import central guide plate 3 is located export center guide board's below, and import central guide plate 3 and export center are equipped with annular baffle 5 between the guide board.

In the embodiment, the central baffles and the annular baffles 5 can be arranged in a staggered arrangement once or multiple times, and in the embodiment, the inlet central baffles 3, the outlet central baffles and the annular baffles 5 are arranged in a staggered manner. Meanwhile, the inlet central guide plate 3 and the outlet central guide plate are arranged on the same straight line, and the annular baffle 5 is arranged on the inner wall of the reactor body 2. The outer edge of the annular baffle plate is welded with the inner wall of the reactor body 2, the center of the annular baffle plate is provided with a hole which is circular or rectangular, and the central point of the hole is coincided with the central point of the section of the reactor body 2. Preferably, the central guide plate is a solid flat steel plate or a conical steel plate structure with a conical top facing the air inlet direction, the central guide plate in this embodiment is a solid flat steel plate, the central guide plate is installed in the reactor body 2 through the section steel, the section steel is transversely provided with two ends welded on the inner wall of the reactor body 2, the central guide plate is welded and fixed on the section steel, and the central point of the central guide plate coincides with the central point of the cross section of the mixing reactor body 2.

In the embodiment, one or more reagent spray pipes 8 are arranged on the inlet reducer 1, the reagent spray pipes extend into the reactor body 2, the extension lines of the reagent spray pipes coincide with the central point of the inlet central guide plate 3, the extension length of the reagent spray pipes is 50% -70% of the distance from the inner wall point of the mixing reactor to the central point of the inlet central guide plate 3, when atomized solution is sprayed, a special two-fluid atomization spray gun (which is additionally arranged) is additionally needed, a spray gun mounting sleeve is preassembled on the reactor, and the sleeve is flush with the inner wall of the reactor body 2.

In the embodiment, the cross section of the reactor body 2 is circular or rectangular, the inner diameter of the reactor body 2 is larger than the inner diameter of the original flue, the reinforcing rib 4 is arranged outside the reactor body 2, the reinforcing rib 4 is made of profile steel, the rest parts except the outer reinforcing rib 4 are all made of stainless steel for corrosion prevention, carbon steel can be used when the requirement is not high, and corrosion allowance is reserved in the thickness of the material; the reactor can be vertically arranged from bottom to top, vertically arranged from top to bottom or horizontally arranged according to the installation position.

This scheme simple structure, design benefit, whole scheme does not have movable part, the trouble is few in the use, durable, through the setting of central guide plate and ring baffle 5, the effectual effect that improves SOx/NOx control makes the flue gas can realize with flue gas intensive mixing and reaction in reactor body 2 internal diversion, baffling, torrent, vortex etc. effect to the efficient is realized to economic means and is mixed, improve reaction dwell time, reduction equipment and flue gas treatment cost.

Example two

A flue mixing reactor for dry desulfurization of sodium bicarbonate. As shown in figure 1: the cross section of the mixing reactor is circular and is coincided with the center of the cross section of the reactor body 2. The central guide plate and the annular baffle 5 are both circular, and the circle center of the baffle coincides with the circle center of the section of the body. The flow passage components are all made of stainless steel and are vertically arranged from bottom to top. The small soda powder of the desulfurizer is ground and then conveyed by low-pressure air to enter a mixing reactor, is blown by a medicament tube, and then flows out of the mixing reactor together with flue gas in the small soda powder through an inlet central guide plate 3, an annular baffle plate 5 and an outlet central guide plate 6, and finally the small soda powder of the desulfurizer is fully mixed and reacted with the flue gas through the actions of multiple flue gas diversion, baffling, turbulence, vortex and the like to generate solid calcium carbonate powder which is trapped in a subsequent bag-type dust collector to achieve the aim of desulfurization.

EXAMPLE III

In the selective catalytic reduction flue gas denitration (SCR) process, a flue is used for spraying urea solution to replace an ammonia spraying grid. As shown in figure 1; the section of the mixing reactor body 2 is rectangular, the central holes of the central guide plate and the annular baffle plate 5 are both rectangular, and the length-width ratio of the rectangular section is the same as that of the cross section of the inlet and outlet rectangular flue. All the flow passage components are made of stainless steel, the agent injection pipe 8 is a spray gun mounting sleeve, a double-fluid atomization spray gun (additionally arranged) is additionally arranged, urea solution with a certain concentration is atomized by a special spray gun after being pressurized, metered and diluted on line and then is injected into the mixing reactor from the injection sleeve, the urea solution is mixed with flue gas through multiple baffling, vortexing and the like, the urea solution is pyrolyzed into ammonia and water vapor at high temperature, the ammonia and the water vapor enter the subsequent SCR denitration reactor together, and the ammonia and the water vapor react with nitrogen oxides in the flue gas under the action of a catalyst to generate nitrogen, so that the aim of denitration is fulfilled.

The above description is a preferred embodiment of the present invention and the technical principle applied to the present invention, and the present invention can also be applied to other occasions where gas and material are mixed, and it will be obvious to those skilled in the art that any obvious changes, such as equivalent changes, simple replacement, etc., based on the technical scheme of the present invention, will fall into the protection scope of the present invention without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides a flue type gas mixing reactor, includes the reactor body, and reactor body upper end is equipped with export reducer, and the lower extreme of reactor body is equipped with import reducer, its characterized in that: this internal central guide plate that is equipped with of reactor, central guide plate include import center guide plate and export center guide board, import center guide plate is located export center guide board's below, is equipped with annular baffle between import center guide plate and the export center guide board.

2. Flue-type gas mixing reactor according to claim 1, characterized in that: the central baffles and the annular baffles can be arranged in a staggered manner for a single time or multiple times.

3. Flue-type gas mixing reactor according to claim 2, characterized in that: the inlet center guide plate and the outlet center guide plate are arranged on the same straight line, and the annular baffle plate is arranged on the inner wall of the reactor body.

4. Flue-type gas mixing reactor according to claim 1, characterized in that: the outer edge of the annular baffle is welded with the inner wall of the reactor body, a hole is formed in the center of the annular baffle, the hole is circular or rectangular, and the central point of the hole is superposed with the central point of the section of the reactor body.

5. A flue-type gas mixing reactor according to claim 3, characterized in that: the central guide plate is a round or rectangular solid flat steel plate or a conical steel plate structure with a round bottom or a rectangular bottom with a conical top facing the air inlet direction.

6. Flue-type gas mixing reactor according to claim 5, characterized in that: the central guide plate is installed in the reactor body through the section steel, the section steel is transversely provided with two ends which are welded on the inner wall of the reactor body, the central guide plate is welded and fixed on the section steel, and the central point of the central guide plate coincides with the central point of the cross section of the mixed reactor body.

7. Flue-type gas mixing reactor according to claim 1, characterized in that: one or more medicament injection pipes are arranged on the inlet reducer.

8. Flue-type gas mixing reactor according to claim 7, characterized in that: the medicament spray pipe extends into the reactor body, the extension line of the medicament spray pipe is superposed with the central point of the inlet central guide plate, and the extending length of the medicament spray pipe is 50-70% of the distance from the inner wall point of the mixing reactor to the central point of the inlet central guide plate.

9. Flue-type gas mixing reactor according to any of claims 1-8, characterized in that: the reactor body is externally provided with reinforcing ribs which are made of profile steel.

10. The flue-type gas mixing reactor according to claim 9, characterized in that: the cross section of the reactor body is circular or rectangular; the inner diameter of the reactor body is larger than that of the original flue.