Ammonia-containing sewage deamination device

Abstract

The utility model discloses an ammonia-containing sewage deamination device which comprises a deamination tower, a condenser is arranged at the upper end of the deamination tower, a gas-liquid separation tank is arranged on one side of the condenser, a droplet separator is fixedly connected to the inner side of the deamination tower, and a liquid distributor is arranged at the lower end of the droplet separator. A first silk screen filler and a second silk screen filler are arranged at the lower end of the liquid distributor, and a gas distributor is arranged at the lower end of the second silk screen filler. According to the structure, the ammonia blowing process and the ammonia pumping process are adopted, most of ammonia in sewage is removed, the mass concentration of ammonia in the remaining water can be reduced to 0.1%, the ammonia can be used as a catalyst to be recycled to an ethanolamine workshop for use, and the removed ammonia can also be used as a raw material to be recycled to the ethanolamine workshop for use. Compared with the prior art, steam consumption in the deamination process is omitted, the ammonia removal effect is good, deaminated sewage can be recycled, subsequent sewage treatment is avoided, meanwhile, the process is simplified, the equipment investment is reduced, and the personnel operation amount is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the sewage treatment technical field in ethanolamine production process, especially a kind of ammonia-containing sewage deamination device. BACKGROUND

[0002] 2-hydroxyethylamine, alias ethanolamine, is an organic compound, chemical formula is C2H7NO, ethanolamine solubility: can be dissolved with water, ethanol and acetone etc., slightly soluble in diethyl ether and carbon tetrachloride, ethanolamine is used as chemical reagent, pesticide, medicine, solvent, dye intermediate, rubber accelerator, corrosion inhibitor and surfactant etc., also be used as acid gas absorbent, emulsifier, plasticizer, rubber vulcanizing agent, printing and dyeing whitening agent, fabric moth inhibitor etc..It can also be used as the plasticizer, vulcanizing agent, accelerator and foaming agent of synthetic resin and rubber and the intermediate of pesticide, medicine and dye, in the production process of ethanolamine, the current mainstream ethanolamine industrial production route is epoxide ammination method, raw material is epoxide, liquid ammonia or ammonia water, catalyst is water.In product dehydration procedure, a large amount of ammonia-containing sewage with high ammonia nitrogen content will be produced, especially the production process with ammonia water as raw material.This part of ammonia-containing sewage usually recovers part of ammonia to return to production plant by rectification, and the ammonia mass concentration in the remaining sewage is between 0.5-1%, chemical deposition method or biological anaerobic ammonia oxidation method is handled.The above treatment process, there is the problem that the rectification deamination thoroughness does not reach the expectation and sewage treatment is difficult.Aiming at the above problems, combining with the characteristics of ethanolamine industrial production, an ammonia stripping technology is provided for ammonia-containing sewage deamination device, to recover ammonia in sewage and achieve the purpose of zero discharge of sewage.

[0003] For the use of ammonia-containing sewage deamination device, the existing ammonia-containing sewage treatment is a simple treatment structure, and the treatment effect does not reach the expectation, so that a large amount of steam is consumed in the treatment process, and the sewage after deamination is directly wasted. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of ammonia-containing sewage deamination device, adopts two processes of blowing ammonia and pumping ammonia, and most of ammonia in sewage is removed, and the ammonia mass concentration in the remaining water can be reduced to 0.1% and can be recycled to ethanolamine workshop as catalyst, and the removed ammonia can also be recycled to ethanolamine workshop as raw material.Compared with prior art, the steam consumption in the deamination process is saved, the ammonia removal effect is good, the sewage after deamination can be recycled, the subsequent sewage treatment is avoided, at the same time, the process is simplified, equipment investment is reduced, and personnel operation amount is reduced.

[0005] In order to achieve the above object, the utility model provides a kind of ammonia-containing sewage deaminating device, including deaminating tower, the upper end of the deaminating tower is provided with condenser, one side of the condenser is provided with gas-liquid separation tank, the inner side of the deaminating tower is fixedly connected with fly ash separator, the lower end of the fly ash separator is provided with liquid distributor, the lower end of the liquid distributor is provided with first wire mesh packing and second wire mesh packing, the lower end of the second wire mesh packing is provided with gas distributor.

[0006] According to the ammonia-containing sewage deaminating device, the lower end of the deaminating tower is provided with a water pump, and the input end of the water pump is fixedly connected with the inside of the deaminating tower.

[0007] According to the ammonia-containing sewage deaminating device, the upper end of the deaminating tower is fixedly and communicatively provided with a gas injector, and the output end of the gas injector is communicated with the inside of the condenser.

[0008] According to the ammonia-containing sewage deaminating device, the inside of the gas-liquid separation tank is connected with the pipeline of the output end of the condenser in a communicated manner, and the output end of the pipeline of the gas-liquid separation tank is fixedly and communicatively provided with a liquid ammonia delivery pump.

[0009] According to the ammonia-containing sewage deaminating device, the lower end of the liquid distributor is fixedly and communicatively provided with a plurality of liquid outlet pipes, and one side of the liquid distributor is fixedly and communicatively provided with an ammonia-containing sewage inlet pipe.

[0010] According to the ammonia-containing sewage deaminating device, the first wire mesh packing is arranged at the upper end of the second wire mesh packing.

[0011] According to the ammonia-containing sewage deaminating device, one side of the gas distributor is fixedly and communicatively provided with a nitrogen inlet pipe, and the upper end of the gas distributor is fixedly and communicatively provided with a plurality of gas outlet pipes.

[0012] According to the ammonia-containing sewage deaminating device, the first wire mesh packing and the second wire mesh packing are 2-4 layers, and the material of the first wire mesh packing and the second wire mesh packing is duplex steel.

[0013] According to the ammonia-containing sewage deaminating device, the gas injector is a Venturi tube.

[0014] Beneficial effects:

[0015] Blowing ammonia: ammonia-containing sewage is pre-adjusted by adding monoethanolamine to adjust the pH value of the sewage, and then enters from the upper part of the deaminating tower, nitrogen is introduced from the lower part of the deaminating tower, and the gas-liquid two phases are countercurrently contacted. The deaminated sewage in the deaminating tower is pumped to the monoethanolamine workshop as a catalyst for recycling;

[0016] Ammonia extraction: high-pressure ammonia gas extracted from the ammonia distillation process of the ethanolamine plant enters the gas ejector, and the suction force is generated by the Venturi effect to extract ammonia gas and nitrogen gas from the top of the ammonia removal tower, and then enters the condenser, and after being cooled by 5 DEG C cooling water, the gas-liquid two-phase flow of liquid ammonia and nitrogen gas is formed, and then enters the gas-liquid separation tank, the separated nitrogen gas is discharged from the top and returned to the lower part of the ammonia removal tower as supplemental nitrogen gas, and the separated liquid ammonia is discharged from the bottom and transported to the ethanolamine plant as raw material by the liquid ammonia delivery pump;

[0017] The ammonia in the sewage is removed by two processes of ammonia blowing and ammonia extraction, and the mass concentration of ammonia in the remaining water can be reduced to 0.1% and can be recovered to the ethanolamine plant as a catalyst, and the removed ammonia can also be recovered to the ethanolamine plant as a raw material. Compared with the prior art, the steam consumption in the ammonia removal process is saved, the ammonia removal effect is good, the sewage after ammonia removal can be recycled, the subsequent sewage treatment is avoided, at the same time, the process is simplified, the equipment investment is reduced, and the operation amount of personnel is reduced.

[0018] The additional aspects and advantages of the present application will be given in part in the following description, some of which will become apparent from the following description, or will be understood by those skilled in the art from the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0019] The present application will be further described below in combination with the drawings and examples;

[0020] Figure 1 A perspective view of an ammonia-containing sewage ammonia removal device is provided for the present application;

[0021] Figure 2 A sectional view of the ammonia removal tower of the ammonia-containing sewage ammonia removal device is provided for the present application;

[0022] Figure 3 A perspective view of an ammonia-containing sewage ammonia removal device is provided for the present application; Figure 2 An enlarged view of A in the middle;

[0023] Figure 4 A treatment process schematic view of an ammonia-containing sewage ammonia removal device is provided for the present application.

[0024] LEGEND:

[0025] 1, mist separator; 2, liquid distributor; 201, liquid outlet pipe; 3, first wire mesh packing; 301, second wire mesh packing; 4, gas distributor; 401, gas outlet pipe; 5, gas ejector; 6, condenser; 7, gas-liquid separation tank; 8, water pump; 9, liquid ammonia delivery pump; 10, ammonia removal tower; 11, nitrogen gas inlet pipe; 12, ammonia-containing sewage inlet pipe. DETAILED DESCRIPTION

[0026] The detailed embodiments of the utility model will be described in detail in this part, the preferred embodiment of the utility model is shown in the drawings, the role of the drawings is to supplement the description of the written part with graphics, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the utility model, but it cannot be understood as the limitation of the protection scope of the utility model.

[0027] Referring to Figures 1-4 The utility model discloses a kind of ammonia-containing sewage deaminating devices, it includes deaminating tower 10, condenser 6 is set on the upper end of deaminating tower 10, condenser 6 is prior art structure, so that 5 ℃ cooling water is formed after cooling liquid ammonia and nitrogen gas gas-liquid two-phase stream, condenser 6 side is provided with gas-liquid separation tank 7, deaminating tower 10 inside is fixedly connected with fly ash separator 1, fly ash separator 1 is metal wire mesh, bottom connection support grid, support grid is fixed on the inner wall of deaminating tower 10, fly ash separator 1 lower end is provided with liquid distributor 2, liquid distributor 2 lower end is provided with first wire mesh packing 3 and second wire mesh packing 301, first wire mesh packing 3 and second wire mesh packing 301 bottom connection support grid, liquid distributor 2 is installed between packing, support grid and liquid distributor 2 are fixed on the inner wall of deaminating tower 10, second wire mesh packing 301 lower end is provided with gas distributor 4.

[0028] Deaminating tower 10 lower end is provided with water pump 8, water pump 8 input end and deaminating tower 10 inside fixed and communicate.

[0029] Deaminating tower 10 upper end is fixedly provided with gas injector 5 and communicates, gas injector 5 output end and condenser 6 inside communicate.

[0030] Gas-liquid separation tank 7 inside and condenser 6 output end pipeline communicate and connect, gas-liquid separation tank 7 top is connected with gas phase pipe, gas-liquid separation tank 7 output end pipeline fixedly communicates with liquid ammonia delivery pump 9.

[0031] Liquid distributor 2 lower end is fixedly provided with multiple liquid outlet pipes 201 and communicates, liquid outlet pipe 201 enables inside to be water, one side of liquid distributor 2 is fixedly provided with ammonia-containing sewage inlet pipe 12 and communicates.

[0032] First wire mesh packing 3 is set on the upper end of second wire mesh packing 301.

[0033] Gas distributor 4 side is fixedly provided with nitrogen inlet pipe 11 and communicates, gas distributor 4 upper end is fixedly provided with multiple gas outlet pipes 401 and communicates, gas outlet pipe 401 enables its inside to be ventilated.

[0034] First wire mesh packing 3 and second wire mesh packing 301 are 2-4 layers, the material of first wire mesh packing 3 and second wire mesh packing 301 is duplex steel.

[0035] The gas ejector 5 is a venturi, which functions to generate suction force through venturi effect to suck out ammonia gas and nitrogen gas at the top of the ammonia removal tower 10 and then enter the condenser 6.

[0036] Working principle: after the device is installed, ammonia-containing sewage is pre-added into the ammonia-containing sewage inlet pipe 12 to adjust the pH value of the sewage to 12 by adding ethanolamine, and then enters from the upper part of the ammonia removal tower 10, nitrogen gas enters from the lower part of the ammonia removal tower 10 through the nitrogen gas inlet pipe 11, and the gas-liquid two-phase countercurrent contact, the ammonia removal tower 10 is the sewage after ammonia removal, which is transported to the ethanolamine workshop by the water pump 8 for recycling as a catalyst; the high-pressure ammonia gas generated by the ammonia evaporation process in the ethanolamine workshop enters the gas ejector 5, the pressure of the high-pressure ammonia gas is 1.5 MPa(G), and the suction force is generated through the venturi effect in the gas ejector 5, the ammonia gas and nitrogen gas at the top of the ammonia removal tower 10 are sucked out and then enter the condenser 6, and then enter the gas-liquid separation tank 7 after being cooled by 5℃ cooling water to form a gas-liquid two-phase flow of liquid ammonia and nitrogen gas, and then enter the gas-liquid separation tank 7, the separated nitrogen gas is discharged from the top and returned to the lower part of the ammonia removal tower 10 as supplemental nitrogen gas, and the separated liquid ammonia is discharged from the bottom and transported to the ethanolamine workshop by the liquid ammonia delivery pump 9 as raw material; by using the ammonia blowing and ammonia extraction processes, most of the ammonia in the sewage is removed, and the remaining ammonia in the water can be reduced to 0.1% and can be recycled to the ethanolamine workshop as a catalyst, and the removed ammonia can also be recycled to the ethanolamine workshop as raw material. Compared with the prior art, the steam consumption in the ammonia removal process is saved, the ammonia removal effect is good, the ammonia removal sewage can be recycled, the subsequent sewage treatment is avoided, at the same time, the process is simplified, the equipment investment is reduced, and the personnel operation amount is reduced.

[0037] The above embodiment of the utility model is described in detail in combination with the drawings, but the utility model is not limited to the above embodiment, and various changes can be made within the knowledge range of ordinary skilled persons in the technical field without departing from the purpose of the utility model.

Claims

1. An apparatus for removing ammonia from an ammonia-containing wastewater, comprising an ammonia removal column (10), characterized in that: The deamination tower (10) is provided with a condenser (6) at the upper end, one side of the condenser (6) is provided with a gas-liquid separation tank (7), the inside of the deamination tower (10) is fixedly connected with a mist separator (1), the lower end of the mist separator (1) is provided with a liquid distributor (2), the lower end of the liquid distributor (2) is provided with a first wire mesh packing (3) and a second wire mesh packing (301), the lower end of the second wire mesh packing (301) is provided with a gas distributor (4).

2. The ammonia-containing wastewater deaminating apparatus according to claim 1, wherein The lower end of the deamination tower (10) is provided with a water pump (8), the input end of the water pump (8) is fixedly connected with the inside of the deamination tower (10) and communicates with each other.

3. The ammonia-containing wastewater deaminating device according to claim 1, characterized in that, The upper end of the deamination tower (10) is fixedly and communicatively provided with a gas ejector (5), the output end of the gas ejector (5) communicates with the inside of the condenser (6).

4. The ammonia-containing wastewater deaminating apparatus according to claim 1, wherein The inside of the gas-liquid separation tank (7) is connected with the output end pipeline of the condenser (6) in a pipeline communication mode, and the output end pipeline of the gas-liquid separation tank (7) is fixedly and communicatively provided with a liquid ammonia delivery pump (9).

5. The ammonia-containing wastewater deaminating apparatus according to claim 1, wherein The lower end of the liquid distributor (2) is fixedly and communicatively provided with a plurality of liquid outlet pipes (201), and one side of the liquid distributor (2) is fixedly and communicatively provided with an ammonia-containing sewage inlet pipe (12).

6. The ammonia-containing wastewater deaminating apparatus according to claim 1, wherein The first wire mesh packing (3) is arranged at the upper end of the second wire mesh packing (301).

7. The ammonia-containing wastewater deaminating apparatus according to claim 1, wherein One side of the gas distributor (4) is fixedly and communicatively provided with a nitrogen inlet pipe (11), and the upper end of the gas distributor (4) is fixedly and communicatively provided with a plurality of gas outlet pipes (401).

8. The ammonia-containing wastewater deaminating apparatus according to claim 1, wherein The first wire mesh packing (3) and the second wire mesh packing (301) are 2-4 layers, and the material of the first wire mesh packing (3) and the second wire mesh packing (301) is duplex steel.

9. The ammonia-containing wastewater deaminating apparatus according to claim 3, wherein The gas ejector (5) is a Venturi tube.

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