CN215781547U

CN215781547U - Direct contact type evaporator

Info

Publication number: CN215781547U
Application number: CN202121511875.XU
Authority: CN
Inventors: 宗肖; 肖诚斌; 曹彦彦; 赵栗; 邵哲如; 赵彬
Original assignee: Everbright Envirotech China Ltd; Everbright Environmental Protection Research Institute Nanjing Co Ltd; Everbright Environmental Protection Technology Research Institute Shenzhen Co Ltd
Current assignee: Everbright Envirotech China Ltd; Everbright Environmental Protection Research Institute Nanjing Co Ltd; Everbright Environmental Protection Technology Research Institute Shenzhen Co Ltd
Priority date: 2021-07-05
Filing date: 2021-07-05
Publication date: 2022-02-11
Anticipated expiration: 2031-07-05

Abstract

The utility model discloses a direct contact type evaporator, and belongs to the technical field of high-salt organic wastewater treatment. The device comprises a combustion chamber, a flue gas main pipe, a flushing pipe, an evaporator shell and a distributor; the distributor is arranged in the evaporator shell and comprises at least two distribution pipes, one end of each distribution pipe penetrates through the side wall of the evaporator shell, and the other end of each distribution pipe extends to the center of the evaporator shell; the combustion chamber is connected to flue gas house steward's one end, and the other end is connected with a plurality of flue gas branch pipes, the quantity of flue gas branch pipe is the same with the distributing pipe, and every distributing pipe can be dismantled with flue gas branch pipe through the hose respectively and be connected, the exit end and the flue gas house steward of flushing pipe are connected. The utility model has the characteristics of no need of blocking holes, easy cleaning, stable operation and convenient maintenance.

Description

Direct contact type evaporator

Technical Field

The utility model belongs to the technical field of high-salinity organic wastewater treatment, and particularly relates to a direct contact type evaporator.

Background

High-salinity organic wastewater such as concentrated solution of leachate of garbage incineration plants and garbage landfills is a difficult problem in the water treatment industry, and at present, the main treatment mode is to spray the wastewater back to a hearth or to the landfills or to carry out indirect evaporation treatment, but the treatment mode can cause a series of negative effects on main equipment of related systems. The direct contact evaporator has the characteristics of high heat transfer efficiency, simple structure, wide applicability and the like, and is gradually applied to the field of environmental protection in recent years.

The structure of the evaporator for treating the high-salt organic wastewater at present mainly has two forms, one is that a distributor is connected behind a combustion chamber, and the distributor is provided with small holes. The structure is simple, the heat exchange efficiency is high, but in the waste water concentration process, the crystallized salt is attached to the distributor along with the gradual rise of the salt concentration, so that the small holes are easily blocked, and the equipment is stopped. And because the distributor is connected with the combustion chamber, the combustion chamber is welded and fixed on the evaporator, and is inconvenient to clean after being blocked. In addition, smoke in the combustion chamber is communicated into waste water through a single hole, and the structure easily causes large pressure fluctuation in the combustion chamber, so that the operation is unstable. In addition, the spiral supercharger, the air distribution plate, the rotational flow plate and other components are additionally arranged in the evaporator, so that heat transfer can be strengthened in principle, but the internal structure of the evaporator is complex, the mechanical failure risk and the maintenance difficulty are increased, and the instability of system operation can be further increased.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved is as follows: aiming at the technical problems, the utility model provides a direct contact evaporator which has the characteristics of difficulty in hole blocking, easiness in cleaning, stability in operation and convenience in maintenance.

The technical scheme is as follows: a direct contact evaporator comprises a combustion chamber, a flue gas main pipe, a flushing pipe, an evaporator shell and a distributor; the distributor is arranged in the evaporator shell and comprises at least two distribution pipes, one end of each distribution pipe penetrates through the side wall of the evaporator shell, and the other end of each distribution pipe extends to the center of the evaporator shell; the combustion chamber is connected to flue gas house steward's one end, and the other end is connected with a plurality of flue gas branch pipes, the quantity of flue gas branch pipe is the same with the distributing pipe, and every distributing pipe can be dismantled with flue gas branch pipe through the hose respectively and be connected, the exit end and the flue gas house steward of flushing pipe are connected.

Preferably, the side wall of the distribution pipe is provided with air holes at equal intervals.

Preferably, the hose is connected with the flue gas branch pipe and the distribution pipe through a flange bolt, a quick-connection flange or a quick-connection joint.

Preferably, a fixed pipe is welded outside the side wall of the evaporator shell, and the distribution pipe penetrates through the fixed pipe and is connected with the end of the fixed pipe through a flange bolt, a quick-connection flange or a quick-connection joint.

Preferably, a burner is arranged in the combustion chamber.

Preferably, the combustion chamber is provided with a vent pipe, and the vent pipe is provided with a vent valve.

Preferably, a flue gas valve is arranged on the flue gas main pipe.

Preferably, a flushing valve is arranged on the flushing pipe.

Preferably, a smoke exhaust pipe and a demister are arranged on the evaporator shell.

Has the advantages that: the utility model has the characteristics of no need of plugging holes, easy cleaning, stable operation and convenient maintenance:

(1) a flushing device is added, so that real-time flushing can be realized; meanwhile, the distributor comprising a plurality of distribution pipes can effectively enhance the heat exchange efficiency, and holes with different sizes on the distribution pipes can ensure the uniformity of gas outlet, so that the problem that the distributor is blocked by crystallized salt generated when the high-salt organic wastewater runs or stops the equipment can be solved, the running stability of the device can be improved, and the running life of the device can be prolonged;

(2) through the detachable distributor structure, the difficulty and the workload of equipment maintenance work are reduced, and the continuous operation life of the direct contact type evaporator is prolonged when high-salt organic wastewater is treated;

(3) the combustion chamber is separately arranged outside the evaporator shell, so that the internal structure of the device can be simplified, and the probability of equipment failure and shutdown is reduced.

Drawings

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

FIG. 2 is a schematic view of the connection of the flue gas branch pipes and the distribution pipes;

the numerical references in the figures represent the following meanings: 1. the device comprises a combustion chamber, a flue gas main pipe 2, a flushing pipe 3, a flue gas branch pipe 4, an evaporator shell 5, a distributor 6, a distribution pipe 7, a hose 8, a fixed pipe 9, a burner 10, a blow-down pipe 11, a smoke exhaust pipe 12 and a demister 13.

Detailed Description

The utility model is further described with reference to the following figures and specific examples.

Example 1

As shown in fig. 1 and 2, a direct contact evaporator comprises a combustion chamber 1, a flue gas main pipe 2, a flushing pipe 3, a flue gas branch pipe 4, an evaporator shell 5 and a distributor 6. The distributor 6 is arranged in the evaporator shell and comprises 6 distribution pipes 7, one end of each distribution pipe 7 penetrates through the side wall of the evaporator shell 5, and the other end of each distribution pipe extends to the center of the evaporator shell 5. One end of the flue gas main pipe 2 is connected with the combustion chamber 1, and the other end is connected with 6 flue gas branch pipes 4; the flue gas branch pipes 4 are respectively connected with the distribution pipes 7 through flexible pipes 8 by flange bolts. The outlet end of the flushing pipe 3 is connected with the flue gas main pipe 2.

Example 2

As shown in fig. 1 and 2, a direct contact evaporator comprises a combustion chamber 1, a flue gas main pipe 2, a flushing pipe 3, a flue gas branch pipe 4, an evaporator shell 5 and a distributor 6. The distributor 6 is arranged in the evaporator shell and comprises 8 distribution pipes 7, one end of each distribution pipe 7 penetrates through the side wall of the evaporator shell 5, and the other end of each distribution pipe extends to the center of the evaporator shell 5. One end of the flue gas main pipe 2 is connected with the combustion chamber 1, and the other end is connected with 8 flue gas branch pipes 4. The equal interval of lateral wall of distribution pipe 7 is equipped with the gas pocket that the aperture size is unequal, can effectively strengthen heat transfer efficiency and reduce high salt organic waste water crystallization stifled hole probability. The hose 8 is connected with the flue gas branch pipe 4 through a quick-connection flange, and the hose 8 is connected with the distribution pipe 7 through a quick-connection joint. The lateral wall of evaporator shell 5 still welds outward and has fixed pipe 9, distribution pipe 7 runs through fixed pipe 9 and passes through flange bolted connection with the end of fixed pipe 9. The combustor 1 is internally provided with a combustor 10, the combustor 1 is also provided with a vent pipe 11, and the vent pipe 11 is provided with a vent valve. A flue gas valve is arranged on the flue gas main pipe 2, a flushing valve is arranged on the flushing pipe 3, and a smoke exhaust pipe 12 and a demister 13 are arranged on the evaporator shell 5.

The utility model can carry out timing flushing when the equipment runs: firstly, the smoke valve is closed by the control system, and the vent valve is opened at the same time, so that the smoke is discharged through the vent pipe 11. Then the flushing valve is opened, and compressed air or high-temperature and high-pressure steam is introduced to flush the distributor 6. The time interval between flushes can be flexibly adjusted according to the nature of the material to be treated. In addition, during the shutdown of the equipment, the flushing pipe 3 can be used for ventilation or liquid medicament is introduced for cleaning and protection, so that the problem that the crystallized salt in the waste water blocks the air hole to cause the restart of the equipment is avoided.

When needing to overhaul, can simply dismantle adapting unit between the pipeline, then take out distributor pipe 7 from evaporimeter casing 5 and inspect or clearance maintenance, greatly reduced the overhaul of the equipments work degree of difficulty, reduced work load.

Claims

1. A direct contact evaporator is characterized by comprising a combustion chamber (1), a flue gas main pipe (2), a flushing pipe (3), an evaporator shell (5) and a distributor (6); the distributor (6) is arranged in the evaporator shell (5) and comprises at least two distribution pipes (7), one end of each distribution pipe (7) penetrates through the side wall of the evaporator shell (5), and the other end of each distribution pipe extends to the center of the evaporator shell (5); combustion chamber (1) is connected to the one end of flue gas house steward (2), and the other end is connected with a plurality of flue gas branch pipes (4), the quantity of flue gas branch pipe (4) is the same with distribution pipe (7), and every distribution pipe (7) can be dismantled with flue gas branch pipe (4) through hose (8) respectively and be connected, the exit end and the flue gas house steward (2) of flushing pipe (3) are connected.

2. A direct contact evaporator according to claim 1, characterized in that the side walls of the distribution pipes (7) are provided with air holes at equal intervals.

3. A direct contact evaporator according to claim 1, characterized in that the hoses (8) are connected to the flue gas branch pipes (4), the hoses (8) are connected to the distribution pipes (7) by means of flange bolts, quick-connect flanges or quick-connect joints.

4. The direct contact evaporator according to claim 1, characterized in that the outer side wall of the evaporator shell (5) is welded with a fixed pipe (9), and the distribution pipe (7) penetrates through the fixed pipe (9) and is connected with the end of the fixed pipe (9) through a flange bolt, a quick-connection flange or a quick-connection joint.

5. A direct contact evaporator according to claim 1, characterized in that a burner (10) is provided in the combustion chamber (1).

6. A direct contact evaporator according to claim 1, characterized in that the combustion chamber (1) is provided with a blow-off pipe (11), and the blow-off pipe (11) is provided with a blow-off valve.

7. A direct contact evaporator according to claim 1, characterised in that the flue gas main (2) is provided with a flue gas valve.

8. A direct contact evaporator according to claim 1, characterised in that the flushing pipe (3) is provided with a flushing valve.

9. A direct contact evaporator according to claim 1, characterised in that the evaporator shell (5) is provided with a smoke evacuation pipe (12) and a demister (13).