A honeycomb phase change evaporator

Abstract

The present invention relates to a honeycomb phase change evaporator, comprising an upright cylinder, the lower part of the cylinder having a closed circulating air system in a horizontal direction, the closed circulating air system having a primary honeycomb structure, a secondary honeycomb structure, a nozzle for downward spraying, and a demister in order from bottom to top; the primary honeycomb structure is a group of pipelines arranged in parallel in a horizontal direction, and the secondary honeycomb structure is a group of pipelines arranged in parallel in a vertical direction; the nozzle is connected to a wastewater inlet. The present invention adopts an evaporation efficiency enhancement device combining a primary honeycomb structure arranged in a horizontal direction and a secondary honeycomb structure arranged in a vertical direction, which can evenly distribute airflow, increase liquid film, make liquid fully contact with air, improve evaporation efficiency, and reduce evaporation energy consumption.

Description

Technical Field

[0001] The invention relates to a honeycomb phase-change evaporator, belonging to the technical field of wastewater treatment. Background Art

[0002] The quality of wastewater from the printing and dyeing industry is mainly composed of sulfate (sodium sulfate). Crystal salt composition: sulfate accounts for 59.3%, sodium accounts for 17.9%, chlorine accounts for 0.87%, and calcium accounts for 0.015%. The conductivity of wastewater entering the evaporation system is about 30,000μs / cm. The existing wastewater evaporation system has low evaporation efficiency and high evaporation energy consumption, which affects the treatment capacity of the entire wastewater treatment system and has some adverse effects on the effective use of water resources. Summary of the invention

[0003] The object of the present invention is to provide a honeycomb phase change evaporator, which has a two-level honeycomb structure, can evenly distribute the airflow, increase the liquid film, make the liquid fully contact with the air, improve the evaporation efficiency, reduce the evaporation energy consumption, and facilitate more efficient steam to be carried out with the circulating wind to the smoke-water heat exchanger for condensation.

[0004] The present invention adopts the following technical solutions:

[0005] A honeycomb phase change evaporator comprises an upright cylinder, wherein the lower part of the cylinder is provided with a closed circulating air system in the horizontal direction, and the closed circulating air system is provided with a primary honeycomb structure 1, a secondary honeycomb structure 2, a nozzle 4 for spraying downward, and a demister 5 in sequence from bottom to top; the primary honeycomb structure 1 is a group of pipelines arranged in parallel in the horizontal direction, and the secondary honeycomb structure 2 is a group of pipelines arranged in parallel in the vertical direction; the nozzle 4 is connected to a wastewater inlet.

[0006] Preferably, the closed circulating air system includes an air inlet and an air outlet that are relatively arranged on the side wall of the cylinder, and the amount of fresh air intake can be adjusted by a damper.

[0007] Preferably, the nozzles 4 are evenly distributed on the cross section inside the cylinder.

[0008] Preferably, the demister 5 is a blade-type demister.

[0009] Preferably, the primary honeycomb structure 1 and the secondary honeycomb structure 2 are both made of PP plastic, and the nozzle is made of silicon carbide ceramic.

[0010] Preferably, the primary honeycomb structure 1 has at least two layers of pipelines in the height direction.

[0011] Preferably, the diameter of the pipeline of the primary honeycomb structure 1 is the same as that of the pipeline of the secondary honeycomb structure 2 .

[0012] Preferably, a gas outlet for communicating with a subsequent smoke-water exchanger is provided at the top of the cylinder.

[0013] Preferably, the wastewater is printing and dyeing wastewater.

[0014] Preferably, there is a gap between the secondary honeycomb structure 2 and the nozzle 4 as an evaporation section 3 .

[0015] The beneficial effects of the present invention are:

[0016] 1) The evaporation efficiency enhancement device, which combines a horizontally arranged primary honeycomb structure and a vertically arranged secondary honeycomb structure, can evenly distribute the airflow, increase the liquid film, make the liquid fully contact with the air, improve the evaporation efficiency, and reduce the evaporation energy consumption;

[0017] 2) It is convenient to more efficiently carry the steam out with the circulating air to the smoke-water heat exchanger for condensation.

[0018] 3) Water resources can be used more effectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front perspective view of the honeycomb phase change evaporator of the present invention.

[0020] Figure 2 yes Figure 1 Middle BB section view.

[0021] Figure 3 yes Figure 1 AA section view.

[0022] Figure 4 It is a schematic diagram of the connection relationship between the honeycomb phase change evaporator of the present invention and the external device when it is working.

[0023] In the figure, 1. primary honeycomb structure, 2. secondary honeycomb structure, 3. evaporation section, 4. nozzle, 5. demister. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0025] See also Figure 1-Figure 4 A honeycomb phase change evaporator comprises a vertical cylinder, the lower part of which is provided with a closed circulating air system in the horizontal direction, and the closed circulating air system is provided with a primary honeycomb structure 1, a secondary honeycomb structure 2, a nozzle 4 for downward spraying, and a demister 5 in sequence from bottom to top; the primary honeycomb structure 1 is a group of pipelines arranged in parallel in the horizontal direction, and the secondary honeycomb structure 2 is a group of pipelines arranged in parallel in the vertical direction; the nozzle 4 is connected to a wastewater inlet.

[0026] In this embodiment, see Figure 4The closed circulating air system includes an air inlet and an air outlet that are relatively arranged on the side wall of the cylinder, and the amount of fresh air intake can be adjusted by a damper.

[0027] In this embodiment, see Figure 2 , the nozzles 4 are evenly distributed on the cross section inside the cylinder.

[0028] In this embodiment, the demister 5 is a blade-type demister.

[0029] In this embodiment, the primary honeycomb structure 1 and the secondary honeycomb structure 2 are both made of PP plastic, and the nozzle is made of silicon carbide ceramic.

[0030] In this embodiment, if Figure 1 As shown, the primary honeycomb structure 1 has two layers of pipelines in the height direction.

[0031] In this embodiment, the diameters of the pipes of the primary honeycomb structure 1 and the secondary honeycomb structure 2 are the same. Of course, the diameters may also be different.

[0032] In this embodiment, see Figure 4 The top of the cylinder is provided with a gas outlet for communicating with a subsequent smoke-water exchanger.

[0033] In this embodiment, the wastewater is printing and dyeing wastewater.

[0034] In this embodiment, see Figure 4 There is a gap serving as an evaporation section 3 between the secondary honeycomb structure 2 and the nozzle 4 .

[0035] During specific treatment, the source of wastewater is: wastewater from printing and dyeing industry.

[0036] The quality of the wastewater to be treated is mainly composed of sulfate (sodium sulfate). Crystal salt composition: sulfate accounts for 59.3%, sodium accounts for 17.9%, chlorine accounts for 0.87%, and calcium accounts for 0.015%. The conductivity of the wastewater entering the evaporation system is about 30,000μs / cm.

[0037] Processed water volume: Achieve evaporation of 1x5t / h (a set of 5t / h); after reaching the concentration of sodium sulfate supersaturated solution, it is discharged to the subsequent crystallization salt separation system.

[0038] Process: After pre-treatment to remove COD, the wastewater is mixed with the evaporation liquid (80-90℃) from the heat pump through the delivery pump, and a part of the water in the solution is evaporated through the nozzle 4, and is fully mixed and contacted with the circulating air in the evaporation section 3, and then passes through the high-efficiency demister 5, enters the smoke-water heat exchanger, is condensed by the circulating cooling water, and enters the cooling water circulating water tank for recycling. The unevaporated solution is in the secondary honeycomb structure 2. Due to the increase in kinetic energy and the decrease in static pressure energy, the solution is further evaporated in the secondary honeycomb structure 2, and is fully contacted with the circulating air in the honeycomb enhancer 1 at the inlet part. The steam enters the smoke-water heat exchanger together with the circulating air, and the condensed water is recycled in the cooling water circulating water tank. The circulating air is not discharged into the atmosphere, and a closed cycle is adopted to enter the honeycomb phase change evaporator to ensure that there is no floating water vapor in the environment. The amount of circulating air can be adjusted by the damper.

[0039] In summary, in this embodiment, a primary honeycomb structure, i.e., an inlet booster, is provided at the lower part of the evaporator to evenly distribute the airflow, increase the liquid film, and fully contact the air; the steam is carried out to the smoke-water heat exchanger with the circulating wind for condensation. A honeycomb structure 2 arranged along the airflow is provided at the upper part of the primary honeycomb structure, and the static pressure of the solution is reduced when it enters the honeycomb structure 2, and it is further vaporized, so that the solution is further evaporated and concentrated. By utilizing the characteristics of the secondary honeycomb structure, the energy consumption of evaporation is reduced, and water resources are effectively utilized.

[0040] The above are preferred embodiments of the present invention. A person skilled in the art may make various changes or improvements on this basis. Without departing from the general concept of the present invention, these changes or improvements should fall within the scope of protection claimed by the present invention.

Claims

1. A honeycomb phase change evaporator, characterized in that: It comprises a vertical cylinder, wherein the lower part of the cylinder has a closed circulating air system in the horizontal direction, and the upper part of the closed circulating air system is provided with a primary honeycomb structure (1), a secondary honeycomb structure (2), a nozzle (4) for spraying downwards, and a demister (5) in order from bottom to top; The primary honeycomb structure (1) is a group of pipelines arranged in parallel in the transverse direction, and the secondary honeycomb structure (2) is a group of pipelines arranged in parallel in the longitudinal direction; The nozzle (4) is connected to the wastewater inlet; The nozzles (4) are evenly distributed on the cross section inside the cylinder; The closed circulating air system includes an air inlet and an air outlet arranged opposite to each other on the side wall of the cylinder, and the air intake volume of the fresh air can be adjusted by the air door; The primary honeycomb structure (1) has at least two layers of pipelines in the height direction; The pipes of the primary honeycomb structure (1) and the pipes of the secondary honeycomb structure (2) have the same diameter; The top of the cylinder is provided with a gas outlet for communicating with a subsequent smoke-water exchanger; The wastewater is printing and dyeing wastewater; There is a gap serving as an evaporation section (3) between the secondary honeycomb structure (2) and the nozzle (4).

2. The honeycomb phase change evaporator according to claim 1, characterized in that: The demister (5) is a blade-type demister.

3. The honeycomb phase change evaporator according to claim 1, characterized in that: The primary honeycomb structure (1) and the secondary honeycomb structure (2) are both made of PP plastic, and the nozzle is made of silicon carbide ceramic.

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