CN211561866U - Novel sewage treatment system - Google Patents

Abstract

The utility model discloses a novel sewage treatment system, which comprises a vertical boiling spray dryer, wherein a two-fluid nozzle in the vertical boiling spray dryer is communicated with a waste tank through a buffer high-pressure tank and a pressure pump; an air outlet at the top of the vertical boiling spray dryer is communicated with an air inlet at the top side of the first cyclone separator, a fan for shutting off the bottom of the first cyclone separator is communicated with a feed inlet of the buffer bin, a windward port at the top of the first cyclone separator is communicated with an inlet of a first induced draft fan, and an outlet of the first induced draft fan is communicated with a tail gas treatment system; an air inlet at the bottom side part of the vertical boiling spray dryer is communicated with a hot air supply system; the air-lock machine at the bottom of the vertical boiling spray dryer and the air-lock machine at the bottom of the buffer bin are communicated with the feed inlet of the material collecting bin through the pneumatic conveying device. The utility model discloses thick liquids in the sewage factory are through spraying and boiling stirring drying back for waste material can recycle, and exhaust gas and particle accomplish emission up to standard.

Description

A new type of sewage treatment system

technical field

The utility model relates to a sewage treatment equipment, in particular to a novel sewage treatment system.

Background technique

With the development of industrialization and urbanization, the pollution of water environment and the shortage of water resources are becoming more and more serious. It is imperative to control water pollution and protect water environment. In order to ensure the effective implementation of sewage treatment, large-scale sewage treatment stations have been successively established in various cities to centralize sewage. How to treat sewage while reusing waste is a sewage treatment method that needs to be studied urgently.

Utility model content

1. Technical problems to be solved by the utility model

The purpose of the present utility model is to provide a new sewage treatment system, which adopts the technical scheme of the present utility model, has a simple structure and is convenient to operate. The particles are discharged up to the standard.

2. Technical solutions

In order to achieve the above object, the technical scheme provided by the present utility model is:

A novel sewage treatment system of the utility model includes a vertical boiling spray dryer for secondary drying treatment of sewage, and the two-fluid nozzle in the vertical boiling spray dryer passes through a buffer high-pressure tank and The outlet of the pressure pump is connected, and the inlet of the pressure pump is communicated with the material liquid conveying pipe through the waste tank, among which the discharge pipe of the waste tank and the inlet of the pressure pump, the outlet of the pressure pump and the inlet of the buffer high pressure tank and the buffer high pressure A manual valve and a pneumatic ball valve are arranged between the outlet of the tank and the vertical boiling spray dryer in sequence; the air outlet on the top of the vertical boiling spray dryer is communicated with the air inlet on the top side of the first cyclone separator , the closing fan at the bottom of the first cyclone separator is communicated with the feed inlet of the buffer bin, the air inlet at the top of the first cyclone separator is communicated with the inlet of the first induced draft fan, and the outlet of the first induced draft fan is communicated with the exhaust gas treatment system; The air inlet of the bottom side of the vertical boiling spray dryer is communicated with the hot air supply system for providing hot air to the vertical boiling spray dryer; the closing fan and buffer at the bottom of the vertical boiling spray dryer The closing fans at the bottom of the silo are connected with the feeding port of the collecting silo through the pneumatic conveying device.

Further, the vertical boiling spray dryer comprises a tower body, a sieve plate and a stirrer for stirring and mixing during boiling and drying, the sieve plate is arranged at the bottom of the tower body, and the inside of the tower body is surrounded by a sieve plate. It is divided into a material area and an air inlet area. The side wall of the air inlet area is provided with an air inlet; the top of the material area is provided with an air outlet, and the material area is provided with a pipeline to communicate with the buffer high-pressure tank. The pipeline is provided with a plurality of two-fluid nozzles, and a related fan is installed at the discharge port at the bottom of the material area; the agitator includes a stirring shaft, a rotary drive device for driving the stirring shaft to rotate, and a stirring blade. The stirring blade is arranged in the tower body, and the stirring blade is located above the sieve plate; the stirring blade is fixedly connected with the upper end of the stirring shaft, and the lower end of the stirring shaft passes through the bottom plate of the tower body and is driven to rotate by the rotary drive device.

Further, it also includes a tap water pipe, which is connected in parallel with the discharge pipe of the waste tank through a manual valve.

Further, the hot air supply system includes a natural gas hot blast stove, the gas port on the natural gas hot blast stove is communicated with the gas conveying pipe through a manual valve, the combustion-supporting port on the natural gas hot blast stove is communicated with the outlet of the combustion-supporting fan, and the natural gas hot air The cold air inlet on the furnace is communicated with the outlet of the fan; an air filter is connected to the inlet of the combustion-supporting fan and the inlet of the fan.

Further, the pneumatic conveying device includes a gas transmission pipeline and a second cyclone separator, and the closed fan at the bottom of the above-mentioned vertical boiling spray dryer and the closed fan at the bottom of the buffer bin are both communicated with the gas transmission pipeline; the described An air filter is provided at the inlet of the gas transmission pipeline, the outlet of the gas transmission pipeline is communicated with the air inlet on the top side of the second cyclone separator, and the air outlet at the top of the second cyclone separator is communicated with the inlet of the second induced draft fan; The closing fan at the bottom of the second cyclone is communicated with the feeding port of the collecting bin.

Further, the tail gas treatment system includes an acid washing tower and an alkaline washing tower, and the induced draft fan, the acid washing tower and the alkaline washing tower are connected in sequence.

Further, the first cyclone separator is provided with two stages, and each stage is provided with two first cyclone separators.

3. Beneficial effects

Compared with the existing known technology, the technical scheme provided by the present utility model has the following beneficial effects:

(1) A novel sewage treatment system of the present utility model, its vertical boiling spray dryer comprises a tower body, a sieve plate and a stirrer for stirring and mixing during boiling and drying, and the sieve plate is arranged at the bottom of the tower body, and the tower The inside of the body is divided into a material area and an air inlet area by a sieve plate. The side wall of the air inlet area is provided with an air inlet, the top of the material area is provided with an air outlet, and the material area is provided with a pipeline to communicate with the buffer high-pressure tank. There are multiple two-fluid nozzles on the pipeline, and related fans are installed at the discharge port at the bottom of the material area. The vertical boiling spray dryer occupies a small area and saves energy. The hot air supplied by the hot air supply system comes from the air inlet on the bottom side of the spray tower. Enter, and then come out from the air outlet at the top of the spray tower. In this way, the upward hot air can not only pre-dry the material sprayed from the two-fluid nozzle, but also can re-dry the material that falls to the bottom of the vertical boiling spray dryer. Re-boiling and drying, in addition, the upward hot air can also slow down the falling speed of the material, prolong the spray drying time, and the drying effect is good;

(2) A novel sewage treatment system of the present invention, the agitator comprises a stirring shaft, a rotary drive device for driving the stirring shaft to rotate, and a stirring blade, the stirring blade is arranged in the tower body, and the stirring blade is located in the sieve Above the plate; the stirring blade is fixedly connected with the upper end of the stirring shaft, and the lower end of the stirring shaft passes through the bottom plate of the tower body and is driven to rotate by the rotary drive device, stirring, mixing, boiling and drying at the bottom of the tower body, improving thermal efficiency, saving energy consumption and reducing The vertical boiling spray dryer is high, and can solve the blockage and agglomeration of the discharge material, so that the material can be fully and evenly dried;

(3) A novel sewage treatment system of the present utility model, which firstly controls the operation of the hot air supply system and the first induced draft fan, so that the hot air supplied by the hot air supply system is sent to the air inlet of the bottom side of the self-supporting boiling spray dryer. In the vertical boiling spray dryer, the hot air inside the vertical boiling spray dryer comes out from the air outlet at the top of the vertical boiling spray dryer, and enters the first cyclone for dust recovery, and then controls the pressure pump to work, so that the The slurry in the waste tank is sent to the vertical boiling spray dryer through the pressure pump and buffer high pressure tank. Due to the design of the vertical boiling spray dryer, the material has undergone spray drying and mixing and stirring boiling drying, and the drying effect is good. , the material after secondary drying in the vertical boiling spray dryer and the material collected by the first cyclone separator are sent to the collection bin through the pneumatic conveying device, and the slurry is dried so that the waste can be recycled;

(4) A novel sewage treatment system of the present utility model, the outlet of the first induced draft fan is communicated with the tail gas treatment system, and the tail gas treatment system includes an acid washing tower and an alkali washing tower, and the induced draft fan, the acid washing tower and the alkali washing tower are sequentially connection, so that the exhaust gas and particles can be discharged up to the standard;

(5) A novel sewage treatment system of the present utility model, which also includes a water pipe, which is connected in parallel to the discharge pipe of the waste tank through a manual valve. After drying is completed, tap water is introduced to clean the entire sewage treatment device. convenient.

Description of drawings

Fig. 1 is the structural representation of a kind of novel sewage treatment system of the present utility model;

2 is a schematic structural diagram of a vertical boiling spray dryer in a novel sewage treatment system of the present invention.

Description of the symbols in the schematic diagram: 1, vertical boiling spray dryer; 1-1, two-fluid nozzle; 1-2, tower body; 1-3, sieve plate; 1-4, stirring shaft; 1-5, rotation Drive device; 1-6, stirring blade; 2, buffer high pressure tank; 3, pressure pump; 4, waste tank; 5, first cyclone separator; 6, buffer bin; 7, first induced draft fan; 8, set Silo; 9. Natural gas hot blast stove; 10. Combustion fan; 11. Fan; 12. Air filter; 13. Gas pipeline; 14. Second cyclone separator; 15. Second induced draft fan; 16. Acid washing tower ; 17. Alkali washing tower.

Detailed ways

In order to further understand the content of the present utility model, the present utility model is described in detail with reference to the accompanying drawings and embodiments.

Example

1, a novel sewage treatment system of the present embodiment includes a vertical boiling spray dryer 1 for secondary drying treatment of sewage, a two-fluid nozzle 1 in the vertical boiling spray dryer 1- 1 is communicated with the outlet of the pressure pump 3 through the buffer high-pressure tank 2, and the inlet of the pressure pump 3 is communicated with the material liquid conveying pipe through the waste tank 4, wherein between the discharge pipe of the waste tank 4 and the inlet of the pressure pump 3, the pressure pump 3 Between the outlet of the buffer high-pressure tank 2 and the inlet of the buffer high-pressure tank 2 and between the outlet of the buffer high-pressure tank 2 and the vertical boiling spray dryer 1, a manual valve and a pneumatic ball valve are arranged in turn; The tuyere is communicated with the air inlet on the top side of the first cyclone separator 5, the closed fan at the bottom of the first cyclone separator 5 is communicated with the feed inlet of the buffer bin 6, and the air inlet on the top of the first cyclone separator 5 is communicated with the first inlet. The inlet of the fan 7 is connected, and in this embodiment, the first cyclone separator 5 is provided with two stages, and each stage is provided with two first cyclone separators 5; the outlet of the first induced draft fan 7 is communicated with the tail gas treatment system, and the tail gas treatment system Including the acid washing tower 16 and the alkali washing tower 17, the first induced draft fan 7, the acid washing tower 16 and the alkali washing tower 17 are connected in turn, so that the exhaust gas and particles are discharged up to the standard; The air inlet is communicated with the hot air supply system for providing hot air to the vertical boiling spray dryer 1; the hot air supply system includes a natural gas hot blast stove 9, and the gas port on the natural gas hot blast stove 9 is communicated with the gas delivery pipe through a manual valve, and the natural gas hot blast The combustion-supporting port on the furnace 9 is communicated with the outlet of the combustion-supporting fan 10, and the cold air inlet on the natural gas hot blast stove 9 is communicated with the outlet of the fan 11; the inlet of the combustion-supporting fan 10 and the inlet of the fan 11 are connected with an air filter 12; The closed fan at the bottom of the boiling spray dryer 1 and the closed fan at the bottom of the buffer bin 6 are all communicated with the feed port of the collection bin 8 through the pneumatic conveying device; The closed fan at the bottom of the above-mentioned vertical boiling spray dryer 1 and the closed fan at the bottom of the buffer bin 6 are all communicated with the gas pipeline 13; the inlet of the gas pipeline 13 is provided with an air filter 12, and the outlet of the gas pipeline 13 It is communicated with the air inlet on the top side of the second cyclone separator 14, and the air outlet on the top of the second cyclone separator 14 is communicated with the inlet of the second induced draft fan 15; The feed port is connected;

Continuing and in conjunction with Fig. 2, the vertical boiling spray dryer 1 includes a tower body 1-2, a sieve plate 1-3 and a stirrer for stirring and mixing during boiling and drying, and the sieve plate 1-3 is arranged in the tower body 1-3. 2. At the inner bottom, the tower body 1-2 is divided into material area and air inlet area by sieve plates 1-3. The side wall of the air inlet area is provided with an air inlet; the top of the material area is provided with an air outlet, and the material area is provided with an air outlet. There is a pipeline to communicate with the buffer high-pressure tank 2, which is provided with a plurality of two-fluid nozzles 1-1, and the relevant fan is installed at the discharge port at the bottom of the material area; the vertical boiling spray dryer occupies a small area and saves energy. The hot air supplied by the hot air supply system enters from the air inlet at the bottom side of the spray tower, and then comes out from the air outlet at the top of the spray tower. In this way, the upward hot air can not only pre-dry the material ejected from the two-fluid nozzle, but also can The material falling to the bottom of the vertical boiling spray dryer is re-boiling and drying. In addition, the upward hot air can also slow down the falling speed of the material, prolong the spray drying time, and the drying effect is good; the stirrer includes stirring shafts 1-4. With the rotary drive device 1-5 and the stirring paddle 1-6 that drive the stirring shaft to rotate, the stirring paddle 1-6 is arranged in the tower body 1-2, and the stirring paddle 1-6 is located above the sieve plate 1-3; The stirring blade 1-6 is fixedly connected with the upper end of the stirring shaft 1-4, and the lower end of the stirring shaft 1-4 passes through the bottom plate of the tower body 1-2 and is driven to rotate by the rotary drive device 1-5, and is stirred and mixed at the bottom of the tower body. Boiling drying improves thermal efficiency, saves energy consumption, and reduces the height of the vertical boiling spray dryer, so that the height of the vertical boiling spray dryer in this embodiment is three times that of the existing vertical boiling fluidized bed dryer. One of them, and can solve the phenomenon of blockage and agglomeration of the material, so that the material can be fully and evenly dried; among them, the rotary drive devices 1-5 are the existing technology, including the motor and the worm gear reducer, and the output shaft of the motor is installed with an active The input end of the worm gear reducer is equipped with a driven wheel, the driving wheel and the driven wheel are connected by a conveyor belt, and the output end of the worm gear reducer is connected with the lower end of the stirring shaft 1-4; The processing system, in order to facilitate cleaning after drying, also includes a tap water pipe, which is connected in parallel to the discharge pipe of the waste tank 4 through a manual valve.

The working steps of a new type of sewage treatment system are:

(1) Control the hot air supply system, so that the hot air supplied by the hot air supply system is sent to the vertical boiling spray dryer from the air inlet on the bottom side of the vertical boiling spray dryer. In the present embodiment, the hot air supply system includes a natural gas hot blast stove 9, the gas port on the natural gas hot blast stove 9 is communicated with the gas conveying pipe through the manual valve, the combustion-supporting port on the natural gas hot blast stove 9 is communicated with the outlet of the combustion-supporting fan 10, and the cold air inlet on the natural gas hot blast stove 9 is communicated with the outlet of the fan 11; The inlet of the combustion-supporting fan 10 and the inlet of the fan 11 are connected with an air filter 12, wherein the temperature of the cold air entering the air filter 12 is 15-20 ° C, and the model of the fan 11 is 9-26-10.5D (rotation speed is 1450r). /min, energy-saving frequency conversion motor YX3-280S-4 (75kw); flow rate is 20000m ³ /h, full pressure is 7000pa), the model of combustion fan 10 is 9-26-5.6A (speed is 2900r/min, energy-saving frequency conversion motor YX3-160L-4 (22kw); the flow rate is 6000m ³ /h, the total pressure is 7000pa), the natural gas consumption is 350m ³ /h, and the inlet pressure is 18kpa. In addition, the vertical boiling spray dryer is made of existing The improved vertical fluidized fluidized bed dryer is obtained by first adding a spray component to the existing vertical fluidized fluidized bed dryer, and then adding a stirring blade to the existing vertical fluidized fluidized bed dryer. And make the stirring blade connected with the rotary driving device outside the existing vertical fluidized bed dryer through the stirring shaft;

(2) Control the operation of the first induced draft fan, so that the hot air inside the vertical boiling spray dryer comes out from the air outlet at the top of the vertical boiling spray dryer, and is sent to the tail gas by the first induced draft fan after passing through the first cyclone separator. Treatment system treatment, in this implementation, the tail gas treatment system treatment includes an acid scrubbing tower 16 and an alkali scrubbing tower 17, the first induced draft fan 7, the acid scrubbing tower 16 and the alkali scrubbing tower 17 are connected in sequence, among which the vertical boiling spray dryer. The pressure is -100-100Pa, the temperature of the hot air from the vertical boiling spray dryer after drying the material is 110-120°C, the model of the first induced draft fan 7 is 9-26-10D (the speed is 1450r/min, energy saving Frequency conversion motor YX3-280S-4 (75kw); flow rate is 26000m ³ /h, full pressure is 5000pa), the first cyclone separator 5 is provided with two stages, and each stage is provided with two first cyclone separators 5;

(3) Distilling and concentrating the sewage in the sewage plant into a slurry with a certain solid content, the slurry is sent to the waste tank through the material-liquid conveying pipe, and the pressure pump is controlled to work, and the slurry in the waste tank is The pressure pump and buffer high-pressure tank are sent to the vertical boiling spray dryer, and sprayed from the two-fluid nozzle in the vertical boiling spray dryer for pre-drying, in which the material falling to the bottom of the vertical boiling spray dryer is stirred. After mixing and boiling drying, it is discharged from the closed fan at the bottom of the vertical boiling spray dryer, and the material taken away by the hot air enters the first cyclone separator and is discharged from the closed fan at the bottom of the first cyclone separator to the buffer bin; The solid content of the slurry is 18%, the temperature of the slurry is 80℃, the processing capacity of the slurry is 5000kg/h, the power of the pressure pump is 30kw, the flow rate is 5.7m ³ /h, and the pressure is 0-12Mpa; buffer high pressure The pressure in the tank is 0-8Mpa, and there are eight two-fluid nozzles;

(3) The material discharged by the closed fan at the bottom of the vertical boiling spray dryer and the material discharged by the closed fan at the bottom of the buffer bin enter the collection bin through the pneumatic conveying device. The pneumatic conveying device includes the gas transmission pipeline 13 and the second cyclone. Separator 14, the closed fan at the bottom of the above-mentioned vertical boiling spray dryer 1 and the closed fan at the bottom of the buffer bin 6 are all communicated with the gas pipeline 13; The outlet of the duct 13 is communicated with the air inlet on the top side of the second cyclone separator 14, and the air outlet at the top of the second cyclone separator 14 is communicated with the inlet of the second induced draft fan 15; The feeding port of the collection bin 8 is connected, wherein the outer diameter of the gas pipeline 13 is 159mm, the wall thickness of the gas pipeline 13 is 2mm, the air volume entering the gas pipeline 13 is 3000m ³ /h, and the air volume entering the gas pipeline 13 The air temperature is 20°C, the model of the second induced draft fan 15 is 9-26-4.5A-11kw (air volume is 4000m ³ /h, air pressure is 4600pa, energy-saving variable frequency motor YX3-160M-2).

The novel sewage treatment system of the utility model has a simple structure. After the slurry in the sewage plant is dried by spraying and boiling, the waste can be recycled and the waste gas and particles can be discharged up to the standard.

The present invention and its embodiments have been schematically described above, and the description is not restrictive, and what is shown in the accompanying drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it, without departing from the purpose of creation of the present invention, without creative design of the structure and embodiment similar to the technical solution, all should belong to the present invention. protected range.

Claims (7)

1. The utility model provides a novel sewage treatment system which characterized in that: the sewage treatment system comprises a vertical boiling spray dryer (1) for performing secondary drying treatment on sewage, wherein two fluid nozzles (1-1) in the vertical boiling spray dryer (1) are communicated with an outlet of a pressure pump (3) through a buffer high-pressure tank (2), an inlet of the pressure pump (3) is communicated with a feed liquid conveying pipe through a waste material tank (4), and a manual valve and a pneumatic ball valve are sequentially arranged between a discharge pipeline of the waste material tank (4) and an inlet of the pressure pump (3), between an outlet of the pressure pump (3) and an inlet of the buffer high-pressure tank (2) and between an outlet of the buffer high-pressure tank (2) and the vertical boiling spray dryer (1); an air outlet at the top of the vertical boiling spray dryer (1) is communicated with an air inlet at the top side of the first cyclone separator (5), a fan for shutting off the bottom of the first cyclone separator (5) is communicated with a feed inlet of the buffer bin (6), an air inlet at the top of the first cyclone separator (5) is communicated with an inlet of a first induced draft fan (7), and an outlet of the first induced draft fan (7) is communicated with a tail gas treatment system; the air inlet at the bottom side part of the vertical boiling spray dryer (1) is communicated with a hot air supply system used for providing hot air for the vertical boiling spray dryer (1); the air shutting machine at the bottom of the vertical boiling spray dryer (1) and the air shutting machine at the bottom of the buffer bin (6) are communicated with a feed inlet of the material collecting bin (8) through a pneumatic conveying device.

2. The novel sewage treatment system according to claim 1, wherein: the vertical boiling spray dryer (1) comprises a tower body (1-2), a sieve plate (1-3) and a stirrer for stirring and mixing during boiling drying, wherein the sieve plate (1-3) is arranged at the bottom in the tower body (1-2), the inside of the tower body (1-2) is divided into a material area and an air inlet area by the sieve plate (1-3), and an air inlet is formed in the side wall of the air inlet area; the top of the material area is provided with an air outlet, a pipeline which is communicated with the buffer high-pressure tank (2) is arranged in the material area, the pipeline is provided with a plurality of two fluid nozzles (1-1), and a discharge outlet at the bottom of the material area is provided with a related fan; the stirrer comprises a stirring shaft (1-4), a rotary driving device (1-5) for driving the stirring shaft to rotate and stirring blades (1-6), wherein the stirring blades (1-6) are arranged in the tower body (1-2), and the stirring blades (1-6) are positioned above the sieve plate (1-3); the stirring blades (1-6) are fixedly connected with the upper ends of the stirring shafts (1-4), and the lower ends of the stirring shafts (1-4) are driven to rotate by the rotary driving devices (1-5) after penetrating through the bottom plate of the tower body (1-2).

3. The novel sewage treatment system according to claim 1, wherein: the waste tank is characterized by further comprising a tap water pipe, wherein the tap water pipe is connected to a discharge pipeline of the waste tank (4) in parallel through a manual valve.

4. A novel sewage treatment system according to claim 1, 2 or 3 wherein: the hot air supply system comprises a natural gas hot blast stove (9), a fuel gas port on the natural gas hot blast stove (9) is communicated with a fuel gas conveying pipe through a manual valve, a combustion-supporting port on the natural gas hot blast stove (9) is communicated with an outlet of a combustion-supporting fan (10), and a cold air inlet on the natural gas hot blast stove (9) is communicated with an outlet of a fan (11); the inlet of the combustion fan (10) and the inlet of the fan (11) are both connected with an air filter (12).

5. The novel sewage treatment system according to claim 4, wherein: the pneumatic conveying device comprises a gas conveying pipeline (13) and a second cyclone separator (14), and a wind closing machine at the bottom of the vertical boiling spray dryer (1) and a wind closing machine at the bottom of the buffer bin (6) are both communicated with the gas conveying pipeline (13); an air filter (12) is arranged at the inlet of the gas transmission pipeline (13), the outlet of the gas transmission pipeline (13) is communicated with an air inlet at the top side part of the second cyclone separator (14), and an air outlet at the top part of the second cyclone separator (14) is communicated with an inlet of a second induced draft fan (15); and a blower fan at the bottom of the second cyclone separator (14) is communicated with a feed inlet of the aggregate bin (8).

6. The novel sewage treatment system according to claim 5, wherein: the tail gas treatment system comprises an acid washing tower (16) and an alkali washing tower (17), wherein the first induced draft fan (7), the acid washing tower (16) and the alkali washing tower (17) are sequentially connected.

7. The novel sewage treatment system according to claim 6, wherein: the first cyclone separators (5) are provided with two stages, and each stage is provided with two first cyclone separators (5).

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