CN116199370A - Hierarchical integrated processing system of thermal power plant, steam power plant's waste water - Google Patents

Abstract

The invention relates to a graded comprehensive treatment system for waste water in thermal power plants and thermal power plants. The present invention includes a first-level wastewater treatment device, a second-level wastewater treatment device, a third-level wastewater treatment device, and a fourth-level wastewater treatment device; the first-level wastewater treatment device is used to perform preliminary water softening treatment on drained water from thermal power plants and thermal power plants; The secondary wastewater treatment device is used to sterilize the domestic sewage drainage of thermal power plants and thermal power plants; the tertiary wastewater treatment device is used to clarify the flushing water drainage of thermal power plants and thermal power plants; The treatment device is used for deep water softening treatment of high-salt wastewater drainage from thermal power plants and thermal power plants. In the present invention, waste water is treated according to its quality for differential classification, differential treatment, and differential recycling, which improves the comprehensive utilization efficiency of water resources, reduces waste of water resources, and reduces the operating cost of thermal power plants. Better collection and utilization of rainwater and domestic sewage.

Description

A classification and comprehensive treatment system for wastewater from thermal power plants and thermal power plants

technical field

The invention relates to a graded comprehensive treatment system for waste water in thermal power plants and thermal power plants.

Background technique

my country is a country rich in water resources but relatively scarce in terms of per capita water resources. The possession of water resources in various regions is extremely unbalanced, especially in Northwest China, North China and other regions where the supply of industrial water is relatively tight.

Thermal power plants and thermal power plants are large industrial water consumers, and there are many types of waste water. The details are as follows: unit start-up drainage, water production flushing water drainage, circulating water drainage, desulfurization wastewater, machine furnace accident drainage, machine furnace drainage water drainage, heating network system drainage, heating network start-up flushing drainage, domestic sewage, coal-containing wastewater, Oily wastewater, rainwater drainage, bottom drainage of steam exhaust device, fine treatment of flushing wastewater, etc. In recent years, as environmental protection requirements have become more and more stringent, zero discharge requirements for wastewater have been put forward in the power industry. Various power generation companies have increased investment in sewage and wastewater treatment, increased investment in water treatment-related equipment, and optimized the rational recycling of water resources. Great achievements have been made in the recycling of water resources.

Existing document CN201621061843.3, an industrial wastewater treatment pool, its structure includes a pool body and a sealing cover for sealing the pool body, the pool body includes a coarse filter tank and an aeration tank, and a The clapboard lower than the height of the tank body, a filter screen is set between the connecting clapboard and the sealing cover; the waste water inlet is set above the coarse filter tank, and the water outlet is set below the aeration tank; the pool wall of the coarse filter tank and The bottom of the pool is provided with a first agitator; the wall of the aeration tank is provided with a second agitator, and the bottom of the aeration tank is provided with a microporous aerator. Since there is a coarse filter tank, the coarse filter tank can filter the solid impurities in the industrial wastewater, so that the solid impurities stay in the coarse filter tank, as long as the solid impurities in the coarse filter tank are cleaned regularly, there is no need to clean up the entire wastewater treatment tank. Cleaning is carried out, so that the industrial wastewater treatment pool is convenient for cleaning solid impurities in industrial wastewater, and has the advantage of good treatment effect.

Existing document CN202020994127.0, a wastewater treatment device with wastewater reuse function, including a water inlet and a filter screen, the right end of the water inlet is provided with a motor, and the right end of the motor is provided with an adding port, the water inlet A stirring box is arranged under the left end, and a rotating shaft is arranged at the right end of the stirring box, a stirring rod is installed under the left end of the rotating shaft, a support rod is fixed under the groove, and a fixing seat is installed under the left end of the connecting seat, Activated carbon filter cotton is installed below the filter screen, and a biofilm filter layer is arranged below the activated carbon filter cotton. Compared with the existing common wastewater treatment device, the wastewater treatment device with wastewater reuse function greatly improves the performance of the entire wastewater treatment device while increasing the structure. The improved wastewater treatment device has chemical additives and wastewater uniform Stirring structure and waste water filtering structure effectively meet people's needs.

Using the above two methods, differential classification, differential treatment, and differential recycling of undifferentiated wastewater quality lead to high-quality wastewater being treated as industrial wastewater, which increases the operating pressure of the industrial wastewater system, reduces the comprehensive utilization of wastewater, and increases Unnecessary waste of resources increases the economical operating costs of thermal power plants. Rainwater and domestic sewage are not well collected and utilized, resulting in wasted water.

Contents of the invention

The technical problem to be solved by the present invention is to provide a thermal power plant and thermal power plant waste water graded comprehensive treatment system which can carry out differential treatment of waste water.

The present invention adopts following technical scheme:

The invention includes a primary wastewater treatment device, a secondary wastewater treatment device, a tertiary wastewater treatment device and a quaternary wastewater treatment device;

The first-stage wastewater treatment device is used for preliminary water softening treatment of discharged water from thermal power plants and thermal power plants;

The secondary wastewater treatment device is used for sterilizing the domestic sewage drainage of thermal power plants and thermal power plants;

The three-stage wastewater treatment device is used for clarification treatment of the flushing water drainage of the water production system of thermal power plants and thermal power plants;

The four-stage wastewater treatment device is used for deep water softening treatment of high-salt wastewater drainage from thermal power plants and thermal power plants.

The first-stage wastewater treatment device of the present invention includes a first sedimentation tank whose inlet is connected to the drainage pipes of thermal power plants and thermal power plants, a first filter device whose inlet is connected to the outlet of the first sedimentation tank, and a first filter device whose inlet is connected to the outlet of the first filter device. The first water softening device, the outlet of the first water softening device is connected to the user, and the first sedimentation tank, the first filtering device, and the sewage outlet of the first softening device are all connected to the industrial wastewater treatment device.

The secondary wastewater treatment device of the present invention comprises an anaerobic tank whose inlet is connected to the filtered rainwater drainage pipe of thermal power plant and thermal power plant, an oxidation tank whose inlet is connected to the outlet of the anaerobic tank, an aeration tank whose inlet is connected to the outlet of the oxidation tank, The microorganism addition tank whose inlet is connected to the outlet of the aeration tank and the second sedimentation tank whose inlet is connected to the microorganism addition tank, the outlet of the second sedimentation tank is connected to the user, the anaerobic tank, the oxidation tank, the aeration tank, the microorganism addition tank The sewage outlets of the tank and the second sedimentation tank are connected with the industrial wastewater treatment device.

The three-stage wastewater treatment device of the present invention includes a stirring tank connected to the inlet of the thermal power plant and the flushing water drainage pipe of the thermal power plant water system, a second filtering device connected to the outlet of the mixing tank, and a second filtering device connected to the outlet of the inlet and the second filtering device. The third sedimentation tank, the outlet of the third sedimentation tank is connected to the user, and the sewage outlets of the stirring tank, the second filtering device and the third sedimentation tank are all connected to the industrial wastewater treatment device.

The four-stage wastewater treatment device of the present invention includes a fourth sedimentation tank whose inlet is connected to the high-salt wastewater discharge pipe of thermal power plant and thermal power plant, a third filter device whose inlet is connected to the outlet of the fourth sedimentation tank, and an inlet connected to the outlet of the third filter device The second water softening device, the ultrafiltration device whose inlet is connected to the outlet of the second water softening device, the nanofiltration device whose inlet is connected to the outlet of the ultrafiltration device, the reverse osmosis device whose inlet is connected to the outlet of the ultrafiltration device, and the inlet and reverse osmosis device An evaporative concentration device connected to the outlet, the evaporative concentration device is connected to the user, the sewage of the fourth sedimentation tank, the third filter device, the second water softening device, the ultrafiltration device, the nanofiltration device, the reverse osmosis device and the evaporative concentration device The outlets are all connected to industrial wastewater treatment equipment.

The users of the first-stage wastewater treatment device, the second-stage wastewater treatment device, the third-stage wastewater treatment device, and the fourth-stage wastewater treatment device in the present invention protect water production and replenishment.

The invention also includes acid-base wastewater treatment device, high turbidity, high impurity pollution wastewater treatment device, desulfurization heavy metal content exceeding standard wastewater treatment device, according to the traditional industrial wastewater treatment system, coal-containing wastewater treatment system, oily wastewater treatment system, desulfurization wastewater treatment system to process.

The positive effect of the present invention is as follows:

In the present invention, waste water is treated according to its quality for differential classification, differential treatment, and differential recycling, which not only improves the comprehensive utilization efficiency of water resources, reduces waste of water resources, but also reduces the operating cost of thermal power plants. Better collection and utilization of rainwater and domestic sewage.

Description of drawings

Fig. 1 is a topological diagram of the present invention;

Fig. 2 is a flow chart of the first-level wastewater treatment device of the present invention;

Fig. 3 is the flow chart of secondary wastewater treatment device of the present invention;

Fig. 4 is the flow chart of three-stage wastewater treatment device of the present invention;

Fig. 5 is a flow chart of the four-stage wastewater treatment device of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way serves as any limitation of the application, its application or uses. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof.

The relative arrangements of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. At the same time, it should be understood that, for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the Authorized Specification. In all examples shown and discussed herein, any specific values should be construed as illustrative only, and not as limiting. Therefore, other examples of the exemplary embodiment may have different values. It should be noted that like numerals and letters denote like items in the following figures, therefore, once an item is defined in one figure, it does not require further discussion in subsequent figures.

In the description of the present application, it should be understood that orientation words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" etc. indicate the orientation Or positional relationship is generally based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description. In the absence of a contrary statement, these orientation words do not indicate or imply the device or element referred to It must have a specific orientation or be constructed and operated in a specific orientation, so it should not be construed as limiting the protection scope of the present application; the orientation words "inner and outer" refer to the inner and outer relative to the outline of each component itself.

For the convenience of description, spatially relative terms may be used here, such as "on ...", "over ...", "on the surface of ...", "above", etc., to describe The spatial positional relationship between one device or feature shown and other devices or features. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, devices described as "above" or "above" other devices or configurations would then be oriented "beneath" or "above" the other devices or configurations. under other devices or configurations”. Thus, the exemplary term "above" can encompass both an orientation of "above" and "beneath". The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptions used herein interpreted accordingly.

In addition, it should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing corresponding components. To limit the protection scope of this application.

Example 1

As shown in accompanying drawings 1-5, the present invention includes a primary wastewater treatment device, a secondary wastewater treatment device, a tertiary wastewater treatment device and a quaternary wastewater treatment device;

The first-stage wastewater treatment device is used for preliminary water softening treatment of discharged water from thermal power plants and thermal power plants;

The secondary wastewater treatment device is used for sterilizing the domestic sewage drainage of thermal power plants and thermal power plants;

The three-stage wastewater treatment device is used for clarification treatment of the flushing water drainage of the water production system of thermal power plants and thermal power plants;

The four-stage wastewater treatment device is used for deep water softening treatment of high-salt wastewater drainage from thermal power plants and thermal power plants.

The first-stage wastewater treatment device of the present invention includes a first sedimentation tank whose inlet is connected to the drainage pipes of thermal power plants and thermal power plants, a first filter device whose inlet is connected to the outlet of the first sedimentation tank, and a first filter device whose inlet is connected to the outlet of the first filter device. The first water softening device, the outlet of the first water softening device is connected to the user, and the first sedimentation tank, the first filtering device, and the sewage outlet of the first softening device are all connected to the industrial wastewater treatment device.

The secondary wastewater treatment device of the present invention comprises an anaerobic tank whose inlet is connected to the filtered rainwater drainage pipe of thermal power plant and thermal power plant, an oxidation tank whose inlet is connected to the outlet of the anaerobic tank, an aeration tank whose inlet is connected to the outlet of the oxidation tank, The microorganism addition tank whose inlet is connected to the outlet of the aeration tank and the second sedimentation tank whose inlet is connected to the microorganism addition tank, the outlet of the second sedimentation tank is connected to the user, the anaerobic tank, the oxidation tank, the aeration tank, the microorganism addition tank The sewage outlets of the tank and the second sedimentation tank are connected with the industrial wastewater treatment device.

The three-stage wastewater treatment device of the present invention includes a stirring tank connected to the inlet of the thermal power plant and the flushing water drainage pipe of the thermal power plant water system, a second filtering device connected to the outlet of the mixing tank, and a second filtering device connected to the outlet of the inlet and the second filtering device. The third sedimentation tank, the outlet of the third sedimentation tank is connected to the user, and the sewage outlets of the stirring tank, the second filtering device and the third sedimentation tank are all connected to the industrial wastewater treatment device.

The four-stage wastewater treatment device of the present invention includes a fourth sedimentation tank whose inlet is connected to the high-salt wastewater discharge pipe of thermal power plant and thermal power plant, a third filter device whose inlet is connected to the outlet of the fourth sedimentation tank, and an inlet connected to the outlet of the third filter device The second water softening device, the ultrafiltration device whose inlet is connected to the outlet of the second water softening device, the nanofiltration device whose inlet is connected to the outlet of the ultrafiltration device, the reverse osmosis device whose inlet is connected to the outlet of the ultrafiltration device, and the inlet and reverse osmosis device An evaporative concentration device connected to the outlet, the evaporative concentration device is connected to the user, the sewage of the fourth sedimentation tank, the third filter device, the second water softening device, the ultrafiltration device, the nanofiltration device, the reverse osmosis device and the evaporative concentration device The outlets are all connected to industrial wastewater treatment equipment.

Example 2

As shown in accompanying drawings 1-5, based on Example 1, the users of the first-level wastewater treatment device, the second-level wastewater treatment device, the third-level wastewater treatment device and the fourth-level wastewater treatment device in the present invention protect water production and replenishment.

Example 3

As shown in accompanying drawings 1-5, based on embodiment 1 and embodiment 2, the present invention also includes acid-base wastewater treatment device, high turbidity, high impurity pollution wastewater treatment device, desulfurization heavy metal content exceeding standard wastewater treatment device, according to the traditional industry Wastewater treatment system, coal-containing wastewater treatment system, oily wastewater treatment system, desulfurization wastewater treatment system for treatment.

In the present invention, waste water is treated according to its quality for differential classification, differential treatment, and differential recycling, which not only improves the comprehensive utilization efficiency of water resources, reduces waste of water resources, but also reduces the operating cost of thermal power plants. Better collection and utilization of rainwater and domestic sewage.

Finally, it should be noted that: the above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still It is possible to modify the technical solutions recorded in the foregoing embodiments, or to perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. within the spirit and principles of the present invention shall be included in the within the protection scope of the present invention.

Claims (7)

1. A hierarchical integrated treatment system of waste water of thermal power plant, steam power plant, its characterized in that: comprises a first-level wastewater treatment device, a second-level wastewater treatment device, a third-level wastewater treatment device and a fourth-level wastewater treatment device;

the primary wastewater treatment device is used for performing primary water softening treatment on the dredged water of the thermal power plant;

the secondary wastewater treatment device is used for carrying out sterilization treatment on domestic sewage drainage of the thermal power plant;

the three-stage wastewater treatment device is used for clarifying flushing water drainage of a water making system of a thermal power plant;

the four-stage wastewater treatment device is used for performing advanced water softening treatment on high-salt wastewater drainage of a thermal power plant.

2. The thermal power plant and thermal power plant wastewater grading comprehensive treatment system according to claim 1, wherein: the primary wastewater treatment device comprises a first sedimentation tank, a first filtering device and a first water softening device, wherein the inlet of the first sedimentation tank is connected with a drainage pipeline of the thermal power plant and a drainage pipeline of the thermal power plant, the inlet of the first filtering device is communicated with an outlet of the first sedimentation tank, the inlet of the first water softening device is connected with an outlet of the first filtering device, the outlet of the first water softening device is connected with a user, and the first sedimentation tank, the first filtering device and a sewage outlet of the first softening device are connected with the industrial wastewater treatment device.

3. The thermal power plant and thermal power plant wastewater grading comprehensive treatment system according to claim 2, wherein: the secondary wastewater treatment device comprises an anaerobic tank, an oxidation tank, an aeration tank, a microorganism adding tank and a second sedimentation tank, wherein the inlet of the anaerobic tank is connected with a rainwater drainage pipeline after filtration of a thermal power plant and the outlet of the anaerobic tank, the inlet of the oxidation tank is connected with the outlet of the oxidation tank, the inlet of the microorganism adding tank is connected with the outlet of the aeration tank, the inlet of the microorganism adding tank is connected with the outlet of the microorganism adding tank, the outlet of the second sedimentation tank is connected with a user, and the sewage outlets of the anaerobic tank, the oxidation tank, the aeration tank, the microorganism adding tank and the second sedimentation tank are all connected with the industrial wastewater treatment device.

4. A thermal power plant, thermal power plant wastewater grading integrated treatment system according to claim 3, characterized in that: the three-stage wastewater treatment device comprises a stirring tank, a second filtering device and a third sedimentation tank, wherein the inlet of the stirring tank is connected with a flushing water drainage pipeline of a water making system of a thermal power plant and a thermal power plant, the inlet of the stirring tank is connected with an outlet of the stirring tank, the inlet of the second filtering device is connected with an outlet of the third sedimentation tank, the outlet of the third sedimentation tank is connected with a user, and drain outlets of the stirring tank, the second filtering device and the third sedimentation tank are all connected with the industrial wastewater treatment device.

5. The thermal power plant and thermal power plant wastewater grading comprehensive treatment system according to claim 4, wherein: the four-stage wastewater treatment device comprises a fourth sedimentation tank, a third filtering device, a second water softening device, an ultrafiltration device, a nanofiltration device, a reverse osmosis device and an evaporation concentration device, wherein the inlet of the fourth sedimentation tank is connected with a high-salt wastewater drain pipe of a thermal power plant, the inlet of the third sedimentation tank is communicated with an outlet of the fourth sedimentation tank, the inlet of the second water softening device is connected with an outlet of the third filtering device, the inlet of the ultrafiltration device is connected with an outlet of the second water softening device, the inlet of the nanofiltration device is connected with an outlet of the ultrafiltration device, the inlet of the reverse osmosis device is connected with an outlet of the ultrafiltration device, the evaporation concentration device is connected with an outlet of the reverse osmosis device, the evaporation concentration device is connected with a user, and the fourth sedimentation tank, the third filtering device, the second water softening device, the ultrafiltration device, the nanofiltration device, the reverse osmosis device and a drain of the evaporation concentration device are all connected with the industrial wastewater treatment device.

6. The thermal power plant and thermal power plant wastewater grading comprehensive treatment system according to claim 5, wherein: the primary wastewater treatment device, the secondary wastewater treatment device, the tertiary wastewater treatment device and the quaternary wastewater treatment device are used for protecting water production and water supplement.

7. The thermal power plant and thermal power plant wastewater grading comprehensive treatment system according to claim 6, wherein: the system also comprises an acid-base wastewater treatment device, a high-turbidity high-impurity pollution wastewater treatment device and a desulfurization heavy metal content exceeding wastewater treatment device, and is treated according to a traditional industrial wastewater treatment system, a coal-containing wastewater treatment system, an oil-containing wastewater treatment system and a desulfurization wastewater treatment system.

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