Industrial wastewater grading and classifying treatment device

Abstract

The utility model discloses an industrial wastewater grading and classifying treatment device, relates to the technical field of industrial wastewater treatment, and aims to solve the problems of complicated device, incomplete treatment, high failure rate and high investment and operation cost of the existing process system. One side of the wastewater preparation device is connected with a disc variable-frequency speed-regulating dehydrator, the disc variable-frequency speed-regulating dehydrator is connected with a flue gas concentration and evaporation tower through a concentration valve, the lower part of the flue gas concentration and evaporation tower is provided with a primary valve and a secondary valve which are different in height, and the flue gas concentration and evaporation tower is connected to a wastewater circulating pump in parallel through two pipelines, namely the primary valve and the secondary valve; the other end of the wastewater circulating pump is connected with the upper ends of the disc variable-frequency and variable-speed dehydrator and the flue gas concentration and evaporation tower, the disc variable-frequency and variable-speed dehydrator is connected with the drying tower through a drying valve, and a spiral discharging machine is arranged below the drying tower.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial wastewater treatment, in particular to a device for grading and classifying industrial wastewater treatment. Background Art

[0002] In recent years, the state has successively issued relevant policies such as the "Action Plan for Water Pollution Prevention and Control" and the "Guiding Opinions on Promoting the Resource Utilization of Wastewater", which clearly put forward the process requirements for zero discharge of industrial wastewater. At the same time, various provinces and cities have also successively promulgated water pollutant emission standards for the power and non-power industries. For industrial enterprises such as power, metallurgy, and chemical industry, achieving deep water conservation and zero discharge of waste water has become an inevitable choice.

[0003] However, the treatment of wastewater discharged from wet flue gas desulfurization in the power and non-power industries, metallurgical slag wastewater, and chemical high-salt wastewater is still a difficult problem. These wastewaters mainly contain pollutants such as calcium and magnesium high salt, chlorides, and heavy metals, and some even have a salt content of more than 60,000 mg / L.

[0004] Traditional wastewater treatment processes mostly use physical and chemical treatments such as flocculation and sedimentation, or membrane treatment, as well as flue gas waste heat low-temperature concentration and evaporation treatment. However, most of these methods fail to achieve graded and classified sewage diversion, but instead use centralized mixing and treatment. Due to the complex composition of wastewater pollutants, this treatment method has the disadvantages of complicated process system equipment, incomplete treatment, high failure rate, high investment and operating costs, which limits its promotion and application in industrial applications. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present application is to provide an industrial wastewater grading and classification treatment device, which includes a wastewater modulation device, one side of the wastewater modulation device is connected to a disc variable frequency speed regulation dehydrator, the disc variable frequency speed regulation dehydrator is connected to a flue gas concentration evaporation tower through a concentration valve, the lower part of the flue gas concentration evaporation tower is provided with a primary valve and a secondary valve of different heights, the flue gas concentration evaporation tower is connected to a wastewater circulation pump in parallel through two pipelines of the primary valve and the secondary valve, the other end of the wastewater circulation pump is connected to the upper end of the disc variable frequency speed regulation dehydrator and the flue gas concentration evaporation tower, the disc variable frequency speed regulation dehydrator is connected to the drying tower through a drying valve, and a spiral discharger is provided below the drying tower.

[0006] Preferably, a spray tube bundle is provided in the flue gas concentration evaporation tower.

[0007] Preferably, a hot air flue gas pipe bundle is provided on one side of the flue gas concentration evaporation tower and the drying tower.

[0008] The beneficial technical effects of the utility model are:

[0009] 1. The combination of wastewater conditioning device, disc variable speed dehydrator and flue gas concentration evaporation tower is adopted to simplify the device of the treatment system and reduce the complexity of the system.

[0010] 2. Through the primary valve and the secondary valve, pollutants such as heavy metals with different proportions are discharged respectively to achieve graded and classified treatment of wastewater. The primary valve and the secondary valve discharge pollutants with different proportions respectively, making the wastewater treatment more thorough.

[0011] 3. The device used has a simple structure and is easy to operate, which reduces the failure rate during system operation and improves the stability and reliability of the system.

[0012] 4. Utilize the waste heat of flue gas to circulate the wastewater for heat exchange to above 60-80℃, then atomize it through the spray tube bundle and evaporate it with the flue gas in the concentration tower, making full use of energy, achieving energy saving and better concentration effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model.

[0014] Figure numerals: 1. Wastewater conditioning device, 2. Disc variable frequency speed regulation dehydrator, 3. Flue gas concentration evaporation tower, 4. Wastewater circulation pump, 5. Primary valve, 6. Secondary valve, 7. Concentration valve, 8. Drying valve, 9. Drying tower, 10. Screw discharger. DETAILED DESCRIPTION

[0015] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thoroughly and comprehensively understood.

[0016] like Figure 1 As shown, an industrial wastewater grading and classification treatment device includes a wastewater modulation device 1, one side of the wastewater modulation device 1 is connected to a disc variable frequency speed regulation dehydrator 2, one side of the disc variable frequency speed regulation dehydrator 2 is connected to a flue gas concentration evaporation tower 3 through a concentration valve 7, the lower part of the flue gas concentration evaporation tower 3 is provided with a primary valve 5 and a secondary valve 6 of different heights, the flue gas concentration evaporation tower 3 is connected in parallel to a wastewater circulation pump 4 through two pipelines of the primary valve 5 and the secondary valve 6, the other end of the wastewater circulation pump 4 is connected to the upper ends of the disc variable frequency speed regulation dehydrator 2 and the flue gas concentration evaporation tower 3, the disc variable frequency speed regulation dehydrator 2 is connected to a drying tower 8 through a drying valve 8, and a spiral discharger 10 is provided below the drying tower 9.

[0017] The wastewater conditioning device 1, the disc variable speed dehydrator 2, and the flue gas concentration evaporation tower 3 constitute the main part of the industrial wastewater classification and classification treatment device. When in use, wastewater containing pollutants such as calcium and magnesium high salt, chloride, heavy metals, metallurgical slag wastewater, and chemical high-salt wastewater are first pre-treated by the wastewater conditioning device 1, and then subjected to chemical conditioning treatment and pumped into the disc variable speed dehydrator 2. The characteristics of the disc variable speed dehydrator 2 are used to perform graded speed regulation and concentration, and graded treatment is performed according to the different specific gravities of the pollutants. For example, the light chloride concentrate can be quickly adjusted through the spray pipe bundle to enter the flue gas concentration evaporation tower 3, while the heavy metals with a higher specific gravity are slowly adjusted and pumped into the drying tower 9 for direct drying and separation.

[0018] A hot air flue gas pipe bundle is provided on one side of the lower part of the flue gas concentration evaporation tower 3, and a primary valve 5 and a secondary valve 6 of different heights are provided on the other side of the lower part of the flue gas concentration evaporation tower 3, which are used to classify and treat pollutants according to different specific gravities to achieve a higher concentration effect. A wastewater circulation pump 4 is provided on one side of the primary valve 5. The flue gas concentration evaporation tower 3 uses the waste heat energy of the hot air flue gas entering the hot air flue gas pipe bundle to circulate and heat the wastewater inside to above 60-80°C, and the concentrated liquid sprayed by the spray pipe bundle is further concentrated. The concentrated slurry produced after further concentration sinks to the bottom of the flue gas concentration evaporation tower 3, and is circulated back to the disc variable frequency speed regulation dehydrator 2 by the bottom primary valve 5 and the wastewater circulation pump 4 for dehydration and discharge, and then sent to the drying tower 8 again for drying and separation. The dilute concentrated liquid in the middle and upper parts is pumped back to the top spray pipe bundle by the secondary valve 6 and the wastewater circulation pump 4, and the waste heat of the flue gas is used for evaporation and circulation concentration, and the steam and hot air flue gas are discharged through the flue duct on the upper side of the flue gas concentration evaporation tower 3. This design not only saves energy, but also has a better concentration effect.

[0019] The hot flue gas mentioned here is taken from 200-300℃ high temperature flue gas or other hot air from boilers, one way enters the flue gas concentration evaporation tower 4 for concentrating and evaporating waste water; the other way enters the drying tower 9 to dry the concentrated slurry after dehydration by the disc variable speed control dehydrator 2.

[0020] After the above treatment, the wastewater is treated in the drying tower 9 and discharged by the spiral discharger 10, finally achieving the zero-discharge effect of graded and classified treatment of industrial wastewater. This system can not only effectively treat industrial wastewater, but also save energy and improve the efficiency and environmental protection of wastewater treatment.

[0021] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0022] In the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0024] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0025] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. An industrial wastewater classification and treatment device, characterized in that: The invention comprises a wastewater modulation device (1), one side of which is connected to a disc variable speed dehydrator (2), the disc variable speed dehydrator (2) is connected to a flue gas concentration evaporation tower (3) via a concentration valve (7), the lower part of the flue gas concentration evaporation tower (3) is provided with a primary valve (5) and a secondary valve (6) of different heights, the flue gas concentration evaporation tower (3) is connected in parallel to a wastewater circulation pump (4) via two pipelines of the primary valve (5) and the secondary valve (6), the other end of the wastewater circulation pump (4) is connected to the upper ends of the disc variable speed dehydrator (2) and the flue gas concentration evaporation tower (3), the disc variable speed dehydrator (2) is connected to a drying tower (9) via a drying valve (8), and a spiral discharger (10) is provided below the drying tower (9).

2. The industrial wastewater classification and treatment device according to claim 1 is characterized in that: The flue gas concentration evaporation tower (3) is provided with a spray pipe bundle.

3. The industrial wastewater classification and treatment device according to claim 1 is characterized in that: A hot air flue gas pipe bundle is provided on one side of the flue gas concentration evaporation tower (3) and the drying tower (9).

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