CN215136903U - Submerged combustion evaporator - Google Patents

Abstract

The utility model provides an immersion combustion evaporimeter, include: an evaporator housing, the evaporator housing containing a liquid therein; a combustion chamber, the lower end of which is submerged in the liquid; and the flue gas distributor, the flue gas distributor with the lower extreme of combustion chamber links to each other, the flue gas distributor includes gas distribution chamber and a plurality of flue gas pipeline, wherein gas distribution chamber lateral wall open have a plurality of round holes with flue gas pipeline is connected, flue gas pipeline end is kept away from the combustion chamber and is stretched to liquid depths, flue gas pipeline end export is the cyclic annular equipartition of multilayer. The utility model discloses in making the flue gas evenly let in liquid, reduce the gathering and the adherence of bubble, improve heat exchange efficiency, avoid the big bubble to emerge the liquid that the liquid level caused and splash and equipment vibration, avoid blockking up flue gas runner under the high concentration rate simultaneously, guarantee the steady continuous operation of system.

Description

Submerged combustion evaporator

Technical Field

The utility model relates to an environment-friendly device technical field specifically relates to an submergence burning evaporimeter.

Background

Submerged combustion is a novel energy-saving and environment-friendly combustion technology, also called as a liquid-in-liquid combustion method, and is a method for heating liquid by fully mixing fuel gas and air in advance and feeding the mixture into a combustion chamber for complete combustion so that high-temperature flue gas generated by combustion is directly sprayed into the liquid. The submerged combustion evaporation technology is widely applied to the fields of petrochemical industry, sewage treatment and the like, and particularly has obvious advantages in the treatment of waste liquid which is strong in corrosivity, high in viscosity, easy to scale and toxic and harmful. The immersion combustion evaporation technology is to introduce high-temperature flue gas into waste liquid for direct heat exchange, and has no fixed heat exchange surface and high heat exchange efficiency.

The gas-liquid two-phase direct heat exchange process is one of the basic problems of the submerged combustion evaporation technology, and the uniform distribution of the gas phase has important significance for improving the heat exchange efficiency and ensuring the stable operation. The structure of the flue gas distributor is crucial, and the prior art adopts a plurality of forms such as a multilayer round hole plate, a Y-shaped distribution plate, an inclined branch pipe with a round hole and the like. However, the problems of uneven distribution of gas phase of submerged combustion evaporation, large power consumption, large equipment vibration, easy blockage of a flue gas channel under high concentration multiple and the like still exist.

Therefore, there is a need for a new type of submerged combustion evaporator to solve the above problems.

SUMMERY OF THE UTILITY MODEL

In the summary section a series of concepts in a simplified form is introduced, which will be described in further detail in the detailed description section. The inventive content does not imply any attempt to define the essential features and essential features of the claimed solution, nor is it implied to be intended to define the scope of the claimed solution.

To the not enough of prior art, the utility model provides an submergence burning evaporimeter, include: an evaporator housing, the evaporator housing containing a liquid therein; a combustion chamber, the lower end of which is submerged in the liquid; and the flue gas distributor, the flue gas distributor with the lower extreme of combustion chamber links to each other, the flue gas distributor includes gas distribution chamber and a plurality of flue gas pipeline, wherein gas distribution chamber lateral wall open have a plurality of round holes with flue gas pipeline is connected, flue gas pipeline end is kept away from the combustion chamber and is stretched to liquid depths, flue gas pipeline end export is the cyclic annular equipartition of multilayer.

Preferably, the flue gas duct is L-shaped.

Preferably, the end of the flue gas duct is flared.

Preferably, the tail end of the smoke pipeline is provided with a sawtooth-shaped bubble breaking structure.

Preferably, the length and/or the pore size of the flue gas duct are the same.

Preferably, a circulation cofferdam is arranged in the evaporator shell, and the circulation cofferdam is arranged around the smoke distributor.

Preferably, the evaporator housing is provided with a liquid inlet, and the liquid is replenished in time by monitoring the liquid level.

Preferably, the top of the evaporator shell is provided with a smoke outlet.

Preferably, the bottom of the evaporator shell is provided with a residue outlet.

Preferably, the evaporator shell is provided with a rapping motor on a conical hopper section close to the residue outlet.

The utility model aims at providing an efficient submergence burning evaporimeter makes during the flue gas evenly lets in liquid, reduces the gathering and the adherence of bubble, improves heat exchange efficiency, avoids the big bubble to emerge the liquid that the liquid level caused and splashes and equipment vibration, avoids simultaneously stopping up the flue gas runner under the high concentration rate, guarantees the steady continuous operation of system.

Drawings

The following drawings of the present invention are used herein as part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions of the invention, which are used to explain the principles and devices of the invention. In the drawings, there is shown in the drawings,

fig. 1 is a schematic structural view of a submerged combustion evaporator according to an embodiment of the present invention;

fig. 2 is a schematic view of the distribution of the end of the flue gas duct in a horizontal plane according to an embodiment of the present invention;

wherein: 1-a combustion chamber;

2-evaporator shell;

3-a flue gas distributor;

4, circulating cofferdam;

5, a flue gas outlet;

6-liquid inlet;

7-liquid;

8, vibrating and beating a motor;

9-residue outlet;

10-flue gas duct;

11-air distribution chamber.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present invention.

In order to thoroughly understand the present invention, detailed steps will be presented in the following description in order to explain the supporting structure of the tube heat exchanger proposed by the present invention. It is apparent that the practice of the invention is not limited to the specific details known to those skilled in the art. The preferred embodiments of the present invention are described in detail below, however, other embodiments of the present invention are possible in addition to these detailed descriptions.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

An integrated submerged combustion evaporator for concentrating percolate in the prior art discloses a three-layer round hole plate gas distributor. However, the resistance of the three layers of round hole plates is large; after the high-temperature flue gas is discharged from the straight cylinder at the bottom of the middle part, more gas still approaches the wall surface due to weaker radial flow capacity of the high-temperature flue gas, and the high-temperature flue gas is aggregated into large bubbles and adheres to the wall in the rising process to influence heat exchange; in order to reduce the exhaust gas temperature, higher immersion depth is required, and the kinetic energy consumption is higher; the liquid splashing caused by the accumulated large bubbles floating out of the liquid surface can aggravate the problems of equipment vibration and the like.

The prior art discloses a conical distribution disc type submerged combustion evaporator, and discloses an inverted Y-shaped flue gas distribution plate. However, in order to achieve a better distribution effect of the Y-shaped gas distribution plate, the diameter reduction of the bottom of the combustion chamber increases the flue gas injection speed and increases the kinetic energy loss of equipment; the gas distribution capability in the radial direction is limited, bubbles are easy to gather on the wall surface of the combustion chamber to form large adherent bubbles, and liquid splashing caused by the liquid level floating can aggravate the vibration of the equipment; the high flow rate of flue gas sprayed into the liquid level increases the vibration of the equipment.

In the prior art, the branch pipes are obliquely arranged, so that the liquid level immersion depths of small air injection holes are different, so that the air outlet quantity of small holes with lower liquid level immersion depths at the positions close to the wall surface of the combustion chamber is larger, the air outlet quantity of small holes with higher immersion depths is smaller, large adherent bubbles are easily formed, and the heat exchange efficiency is influenced; in addition, higher immersion depth is needed to reduce the exhaust smoke temperature, and the kinetic energy consumption is higher; and the liquid splashing caused by the fact that large bubbles attached to the wall float out of the liquid surface can aggravate the vibration of the equipment.

The smoke distributor 3 comprises a gas distribution chamber 11 and a plurality of smoke pipelines 10, uniform distribution of smoke in the radial direction is guaranteed, and the tail ends of the smoke pipelines 10 are provided with bubble breaking structures, so that large bubbles are reduced; the submerged combustion evaporator described in the present application is provided with a circulating cofferdam 4 therein to form a circulating flow, thereby effectively overcoming the above problems.

The submerged combustion evaporator of the present invention will be further described with reference to the accompanying drawings.

In one embodiment, as shown in fig. 1, a high efficiency submerged combustion evaporator is provided, which comprises mainly an evaporator shell 2 with liquid contained therein, a combustion chamber 1, a flue gas distributor 3, and a circulating weir 4. The lower end of the combustion chamber 1 is immersed in the liquid 7 and is connected to the flue gas distributor 3. The flue gas distributor 3 comprises a gas distribution chamber 11 and a plurality of flue gas pipelines 10, wherein the side of the gas distribution chamber 11 is provided with a plurality of round holes which are connected with the flue gas pipelines 10, the lower end of the flue gas pipeline 10 is far away from the combustion chamber 1, the outlets of the flue gas pipelines 10 are annularly and uniformly distributed in a multilayer manner, as shown in figure 2, and the tail ends of the flue gas pipelines are flared and zigzag.

The gas and the combustion air are combusted in the combustion chamber 1 to generate high-temperature flue gas, the high-temperature flue gas enters the gas distribution chamber 11 connected with the combustion chamber 1, and the liquid 7 is uniformly introduced through a plurality of flue gas pipelines 10 and directly contacted with the liquid 7 for heat exchange. A circle of circulating cofferdam 4 is arranged between the evaporator shell 2 and the flue gas distributor 3, and a regular circulating flow is formed in the circulating cofferdam 4 under the floating action of the flue gas. The right side of the evaporator shell 2 is provided with a liquid inlet 6, and liquid 7 is timely supplemented by monitoring the liquid level. After the heat exchange between the high-temperature flue gas and the liquid 7, the low-temperature flue gas carrying a large amount of water vapor is discharged from a flue gas outlet 5 at the top of the evaporator shell 2 and enters subsequent processes of condensation, purification and the like. Concentrated solution or residue is discharged from the bottom of the evaporator shell 2, and a vibrating motor 8 is arranged on the conical hopper section close to the residue outlet 9 in order to avoid deposition and blockage.

The application provides a low-resistance low-vibration high-efficiency immersion evaporator, which is characterized in that 1) a flue gas distributor 3 consists of a gas distribution chamber 11 and a plurality of flue gas pipelines 10, the side wall of the flue gas distributor is communicated with the plurality of flue gas pipelines 10, the tail ends of the flue gas pipelines 10 are far away from a combustion chamber 1, and outlets are distributed on a horizontal plane in a multi-layer annular manner; 2) the tail end of the flue gas pipeline 10 is in a flaring shape and is provided with a sawtooth-shaped bubble breaking structure.

Based on the above description, the utility model provides a low resistance low efficient immersion evaporator that shakes has following advantage at least:

1. the side wall of the gas distribution chamber 11 is uniformly provided with a plurality of round holes to be connected with the flue gas pipeline 10, and the outlets of the flue gas pipeline 10 form a plurality of layers of annular uniform distribution on the horizontal plane, so that the uniform distribution of the flue gas in the same horizontal plane is ensured.

2. The tail end of the flue gas pipeline 10 is designed to be flared, and the larger flow area can reduce the risk of crystallization blockage.

3. The zigzag design at the tail end of the flue gas pipeline 10 can destroy large bubbles to generate small bubbles, so that the heat exchange area and the heat exchange time are increased, the immersion depth of equipment can be effectively reduced, and the power consumption and the vibration of the equipment are reduced.

Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Terms such as "disposed" and the like, as used herein, may refer to one element being directly attached to another element or one element being attached to another element through intervening elements. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is otherwise inapplicable or otherwise stated in the other embodiment.

The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many more modifications and variations are possible in light of the teaching of the present invention and are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. A submerged combustion vaporizer, comprising:

an evaporator housing, the evaporator housing containing a liquid therein;

a combustion chamber, the lower end of which is submerged in the liquid; and

flue gas distributor, flue gas distributor with the lower extreme of combustion chamber links to each other, flue gas distributor includes gas distribution chamber and a plurality of flue gas pipeline, wherein gas distribution chamber lateral wall open have a plurality of round holes with flue gas pipeline is connected, flue gas pipeline end is kept away from the combustion chamber and is stretched to liquid depths, flue gas pipeline end export is the cyclic annular equipartition of multilayer.

2. The submerged combustion evaporator of claim 1, characterized in that the flue gas duct is L-shaped.

3. A submerged combustion evaporator according to claim 1, characterised in that the flue gas duct ends in a flared shape.

4. A submerged combustion evaporator according to claim 1, characterised in that the end of the flue gas duct is provided with a serrated bubble breaking structure.

5. A submerged combustion evaporator according to claim 1, characterised in that the length and/or the pore size of the flue gas ducts are the same.

6. The submerged combustion evaporator of claim 1, characterized in that a circulating weir is disposed within the evaporator shell, the circulating weir being disposed around the flue gas distributor.

7. A submerged combustion vaporizer according to claim 1, wherein the vaporizer housing is provided with a liquid inlet, the liquid being replenished in time by monitoring the liquid level.

8. The submerged combustion evaporator of claim 1, characterized in that the top of the evaporator shell is provided with a flue gas outlet.

9. The submerged combustion evaporator of claim 1, characterized in that the evaporator housing is provided with a residue outlet at the bottom.

10. The submerged combustion evaporator of claim 9, characterized in that the evaporator housing is provided with a rapping motor on the cone section near the residue outlet.

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