High-concentration wastewater softening treatment system

Abstract

The utility model discloses a high-concentration wastewater softening treatment system which comprises an alkalinity regulating tank, a first flocculation stirring tank, an alkali liquor tank, a second flocculation stirring tank, a first filter tank and a second filter tank which are communicated in sequence, the alkalinity adjusting tank is communicated with a wastewater conveying pump, a first diaphragm dosing pump and a first gasifier for gasifying dry ice; the bottom end of the first flocculation stirring tank is communicated with the bottom end of the alkalinity adjusting tank; the first flocculation stirring tank is communicated with a third diaphragm dosing pump; the alkali liquor pool is communicated with the fourth diaphragm dosing pump and the second gasifier; the second flocculation stirring tank is communicated with a fourth diaphragm dosing pump; a water outlet valve is fixed on the side wall of the second filter tank. Carbon dioxide gas reacts with water to generate carbonic acid, the carbonic acid can be subjected to precipitation reaction with calcium and magnesium ions to generate calcium carbonate and magnesium carbonate precipitates, and the calcium and magnesium ions in the wastewater can be effectively removed and the hardness is reduced by controlling the reaction conditions.

Description

Technical Field

[0001] The utility model relates to the technical field of high-hard sewage softening treatment, and more specifically, to a high-concentration wastewater softening treatment system. Background Art

[0002] At present, the common hard water softening methods mainly include the sodium carbonate method + lime milk (double-alkali method), ion exchange method and membrane separation method. Only the double-alkali method can achieve a good softening effect for high-concentration wastewater. For example, the ion exchange method and the membrane separation method have high requirements for the hardness of the influent water quality. There are specific types of resins that have a softening effect on high-concentration wastewater, and the ion exchange resins need to be backwashed and regenerated frequently, consuming a large amount of salt and softened water; the membrane separation method cannot directly treat high-hardness water and is only suitable for the advanced treatment of wastewater with relatively low hardness, and the equipment investment is large and the power consumption is high. Therefore, these two methods are not very suitable for treating the hardness removal of high-concentration wastewater. Although the double-alkali method can achieve a good softening effect, there are also many deficiencies. When using the double-alkali method for treatment, the consumption of chemicals is large, the production cost is high, the softening effect of the water body is unstable, and a large amount of sodium ions will be introduced into the water body, resulting in too high salinity of the water body, restricting the reuse of reclaimed water, and the utilization rate of the recycled water is low.

[0003] When using the double-alkali method for treatment, the consumption of chemicals is large, the production cost is high, the softening effect of the water body is unstable, and the hardness content of the effluent is above 200 mg / L. Using the double-alkali method to treat high-concentration wastewater will introduce a large amount of sodium ions, resulting in too high salinity of the water body, restricting the reuse of reclaimed water, and the utilization rate of the recycled water is low.

[0004] Therefore, how to provide a high-concentration wastewater softening treatment system for treating high-hardness, high-turbidity high-concentration wastewater, removing calcium and magnesium scale and turbidity, making the effluent meet the use standards, and improving the utilization rate of the recycled water is an urgent problem to be solved by those skilled in the art. Content of the Utility Model

[0005] In view of this, the utility model provides a high-concentration wastewater softening treatment system, which uses carbon dioxide gas as a water body softening agent and cooperates with an integrated softening treatment system to achieve efficient softening treatment of high-hardness, high-turbidity, high-concentration wastewater.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A high-concentration wastewater softening treatment system, the system includes a sequentially connected alkalinity adjustment tank, a first flocculation stirring tank, an alkali solution tank, a second flocculation stirring tank, a first filtration tank and a second filtration tank;

[0008] The top of the alkalinity adjustment tank is connected to a wastewater transfer pump, a first diaphragm chemical dosing pump for delivering sodium hydroxide solution, and a first vaporizer for dry ice gasification through pipelines respectively; the bottom of the first flocculation and agitation tank is connected to the bottom of the alkalinity adjustment tank through a connecting tank; the top of the first flocculation and agitation tank is connected to a third diaphragm chemical dosing pump for delivering polyferric sulfate solution through a pipeline; the top of the alkali solution tank is connected to a fourth diaphragm chemical dosing pump for delivering sodium hydroxide solution and a second vaporizer for dry ice gasification through pipelines respectively; the top of the second flocculation and agitation tank is connected to a fourth diaphragm chemical dosing pump for delivering polyacrylamide solution through a pipeline; a water outlet valve is fixed at the bottom of the side wall of the second filtration tank opposite to the first filtration tank.

[0009] The beneficial effects of the above technical solution are as follows: wastewater, sodium hydroxide solution, and carbon dioxide gas are introduced into the alkalinity adjustment tank. The carbon dioxide gas can react with water to form carbonic acid, and sodium hydroxide is an alkaline compound, so that the solution in the alkalinity adjustment tank forms an alkaline mixture; the mixture enters the first flocculation and agitation tank for stirring and undergoes an acid-base neutralization reaction with polyferric sulfate solution to generate magnesium carbonate and calcium carbonate precipitates; the mixture enters the alkali solution tank to add sodium hydroxide solution and carbon dioxide gas for the second time, reacts with polyacrylamide in the second flocculation tank to generate polymers and precipitates, and the mixture finally passes through the filtration of the first filtration tank and the second filtration tank to generate reusable recycled water.

[0010] Preferably, the top of the alkalinity adjustment tank is respectively provided with a wastewater inlet, a first softening agent inlet, and a first gas inlet;

[0011] The wastewater transfer pump is connected to the wastewater inlet through a wastewater transfer pipe, and a water volume control valve is fixed at the wastewater inlet; the first diaphragm chemical dosing pump is connected to the first softening agent inlet through a first softening agent transfer pipe, and a first control valve is fixed at the first softening agent inlet; the first vaporizer is connected to the first gas inlet through a first gas transfer pipe, and a first pressure reducing valve is fixed at the first gas inlet;

[0012] Wherein, one end of the first gas transfer pipe far away from the first vaporizer is inserted into the inner cavity of the alkalinity adjustment tank and forms a cross-shaped aeration track; a first gas flow control valve is fixed on the first gas transfer pipe.

[0013] The beneficial effects of the above technical solution are as follows: using sodium hydroxide solution as the first softening agent, the water volume control valve can control the flow rate of high-concentration wastewater entering the alkalinity adjustment tank; the first control valve can control the flow rate of sodium hydroxide solution entering, the first pressure reducing valve can control the inlet air pressure of carbon dioxide, the first gas flow control valve can regulate the delivery volume of carbon dioxide gas, and the carbon dioxide gas is in a cross-shaped gas dispersion state in the alkalinity adjustment tank, which can fully combine with water to form carbonic acid.

[0014] Preferably, an anti-flushing high-pressure air inlet is further provided at the top of the alkalinity adjustment tank, and the anti-flushing high-pressure air inlet is communicated with an air supply device through an air duct; a wind control valve is fixed at the anti-flushing high-pressure air inlet.

[0015] The beneficial effect of the above technical solution is that the input of high-pressure air accelerates the mixing of the liquid in the alkalinity adjustment tank.

[0016] Preferably, it further includes a first stirrer, the motor of the first stirrer is fixed at the top of the first flocculation and agitation tank and its output shaft is inserted into the first flocculation and agitation tank;

[0017] A coagulant aid inlet is provided at the top of the first flocculation and agitation tank, the third diaphragm dosing pump is communicated with the coagulant aid inlet through a coagulant aid delivery pipe and a coagulant aid flow control valve is fixed at the coagulant aid inlet.

[0018] The beneficial effect of the above technical solution is that using polyferric sulfate solution as a coagulant aid, the first stirrer stirs the mixed liquid in the first flocculation and agitation tank and the polyferric sulfate solution evenly to make an acid-base neutralization reaction occur to generate magnesium carbonate and calcium carbonate precipitates.

[0019] Preferably, a second softening agent inlet and a second gas inlet are respectively provided at the top of the alkali liquid tank;

[0020] The fourth diaphragm dosing pump is communicated with the second softening agent inlet through a second softening agent delivery pipe and a second control valve is fixed at the second softening agent inlet; the second vaporizer is communicated with the second gas inlet through a second gas delivery pipe and a second pressure reducing valve is fixed at the second gas inlet;

[0021] Wherein, one end of the second gas delivery pipe far away from the second vaporizer is inserted into the inner cavity of the alkali liquid tank and forms a cross aeration; a second gas flow control valve is fixed on the second gas delivery pipe.

[0022] The beneficial effect of the above technical solution is that the mixed liquid after the first precipitation enters the alkali liquid tank and sodium hydroxide solution and carbon dioxide gas are added for the second time to make the same chemical reaction as that in the alkalinity adjustment tank occur.

[0023] Preferably, it further includes a second stirrer, the motor of the second stirrer is fixed at the top of the second flocculation and agitation tank and its output shaft is inserted into the inner cavity of the second flocculation and agitation tank;

[0024] A polymerizer inlet is provided at the top of the second flocculation and agitation tank, the fourth diaphragm dosing pump is communicated with the polymerizer inlet through a polymerizer delivery pipe and a polymer flow control valve is fixed at the polymerizer inlet.

[0025] The beneficial effects of the above technical solution are as follows: Using the polyacrylamide solution as a polymerization agent, the second mixer causes the mixture of the sodium hydroxide solution and carbon dioxide gas added for the second time to react with the polyacrylamide solution to generate a polymer. After the polymer precipitates, it enters the first filtration tank for filtration.

[0026] Preferably, a first overflow port is provided at the bottom end of the side wall between the first flocculation stirring tank and the alkali solution tank; a second overflow port is provided at the top end of the side wall between the alkali solution tank and the second flocculation stirring tank; a third overflow port is provided at the top end of the side wall between the second flocculation stirring tank and the first filtration tank; a fourth overflow port is provided at the top end of the side wall between the first filtration tank and the second filtration tank.

[0027] The beneficial effects of the above technical solution are as follows: The solution in the alkalinity adjustment tank enters the bottom of the first flocculation stirring tank from the bottom through the connection tank, and after the reaction, it enters the alkali solution tank from the top. After the reaction in the alkali solution tank, the precipitates gather at the bottom of the tank, and the mixed liquid enters the second flocculation stirring tank from the top. After the reaction in the second flocculation stirring tank, the polymer precipitates at the bottom of the tank, and the mixed liquid enters the first filtration tank from the top. The first filtration tank filters the mixed liquid, and the impurities precipitate at the bottom of the first filtration tank. The solution enters the second filtration tank from the top for secondary filtration, and the recycled water after the secondary filtration enters the water production tank through the water outlet valve for recycling and reuse.

[0028] Preferably, a sloping plate is fixed to the inner wall of the first filtration tank between the third overflow port and the fourth overflow port; a filter medium accommodation box is fixed to the inner wall of the first filtration tank below the fourth overflow port; the water outlet valve is provided below the filter medium accommodation box.

[0029] The beneficial effects of the above technical solution are as follows: The filter medium accommodation box is filled with filter media such as quartz sand and anthracite for water filtration, and the softened water generated after filtration is recycled.

[0030] Preferably, a conical sedimentation tank is formed at the bottom end of each of the alkalinity adjustment tank, the first flocculation stirring tank, the alkali solution tank, the second flocculation stirring tank, and the first filtration tank.

[0031] Preferably, a first discharge valve is fixed to the bottom end of the connection tank; a second discharge valve is fixed to the bottom end of the alkali solution tank; a third discharge valve is fixed to the bottom end of the second flocculation stirring tank; a plurality of fourth discharge valves are fixed to the bottom end of the first filtration tank.

[0032] The beneficial effects of the above technical solution are as follows: The generated precipitates can be collected and utilized through the discharge valve.

[0033] As can be seen from the above technical solutions, compared with the prior art, the present utility model discloses a high-concentration wastewater softening treatment system. Carbon dioxide gas reacts with water to form carbonic acid, which can react with calcium and magnesium ions to form calcium carbonate and magnesium carbonate precipitates. By controlling the reaction conditions, the calcium and magnesium ions in the wastewater can be effectively removed, reducing the hardness.

[0034] Compared with the traditional method of softening water with sodium carbonate (double-alkali method), carbon dioxide is a relatively cheap and easily available raw material. Using carbon dioxide to remove hardness can greatly reduce the treatment cost; at the same time, it will not introduce new pollutants, and can also significantly reduce carbon emissions. The reaction products calcium carbonate and magnesium carbonate can be recycled, meeting the requirements of environmental protection; the reaction process is easy to control, does not require complex equipment and operation procedures, and has low maintenance costs; it can quickly and effectively remove the hardness in high-concentration wastewater, achieving an ideal treatment effect and improving the utilization rate of recycled water. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0036] Figure 1 It is a schematic structural diagram of the treatment system provided by the present utility model;

[0037] Figure 2 It is a flow chart of the wastewater softening treatment provided by the present utility model.

[0038] Among them,

[0039] 1 - Alkalinity adjustment tank; 11 - Water volume regulating valve; 12 - First control valve; 13 - First pressure reducing valve; 14 - Wind force regulating valve;

[0040] 2 - First flocculation stirring tank; 21 - First stirrer; 22 - Coagulant aid flow regulating valve;

[0041] 3 - Alkali liquid tank; 31 - Second discharge valve; 32 - Second control valve; 33 - Second pressure reducing valve;

[0042] 4 - Second flocculation stirring tank; 41 - Third discharge valve; 42 - Polymerization flow regulating valve; 43 - Second stirrer;

[0043] 5 - First filtration tank; 51 - Fourth discharge valve; 52 - Inclined plate;

[0044] 6 - Second filtration tank; 61 - Filter medium accommodation box;

[0045] 7 - Connection pool; 71 - First drain valve;

[0046] 8 - Effluent valve. Specific embodiments

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0048] The embodiment of the present utility model discloses a high - concentration wastewater softening treatment system, which includes an alkalinity adjustment tank 1, a first flocculation stirring tank 2, an alkali solution tank 3, a second flocculation stirring tank 4, a first filtration tank 5 and a second filtration tank 6 connected in sequence;

[0049] The top of the alkalinity adjustment tank 1 is connected through pipelines to a wastewater transfer pump, a first diaphragm dosing pump for transporting sodium hydroxide solution and a first vaporizer for dry ice gasification respectively; the bottom of the first flocculation stirring tank 2 is connected to the bottom of the alkalinity adjustment tank 1 through a connection pool 7; the top of the first flocculation stirring tank 2 is connected through a pipeline to a third diaphragm dosing pump for transporting polyferric sulfate solution; the top of the alkali solution tank 3 is connected through pipelines to a fourth diaphragm dosing pump for transporting sodium hydroxide solution and a second vaporizer for dry ice gasification respectively; the top of the second flocculation stirring tank 4 is connected through a pipeline to a fourth diaphragm dosing pump for transporting polyacrylamide solution; an effluent valve 8 is fixed at the bottom of the side wall of the second filtration tank 6 opposite to the first filtration tank 5.

[0050] In this embodiment, conical sedimentation tanks are formed at the bottoms of the alkalinity adjustment tank 1, the first flocculation stirring tank 2, the alkali solution tank 3, the second flocculation stirring tank 4 and the first filtration tank 5.

[0051] To further optimize the above - mentioned technical solution, a first drain valve 71 is fixed at the bottom of the connection pool 7; a second drain valve 31 is fixed at the bottom of the alkali solution tank 3; a third drain valve 41 is fixed at the bottom of the second flocculation stirring tank 4; a plurality of fourth drain valves 51 are fixed at the bottom of the first filtration tank 5.

[0052] To further optimize the above - mentioned technical solution, a first overflow port is opened at the bottom of the side wall between the first flocculation stirring tank 2 and the alkali solution tank 3; a second overflow port is opened at the top of the side wall between the alkali solution tank 3 and the second flocculation stirring tank 4; a third overflow port is opened at the top of the side wall between the second flocculation stirring tank 4 and the first filtration tank 5; a fourth overflow port is opened at the top of the side wall between the first filtration tank 5 and the second filtration tank 6.

[0053] To further optimize the above technical solution, a wastewater inlet, a first softening agent inlet, and a first gas inlet are respectively provided at the top of the alkalinity adjustment tank;

[0054] The wastewater transfer pump is connected to the wastewater inlet through a wastewater transfer pipe, and a water volume regulating valve 11 is fixed at the wastewater inlet; the first diaphragm dosing pump is connected to the first softening agent inlet through a first softening agent transfer pipe, and a first control valve 12 is fixed at the first softening agent inlet; the first vaporizer is connected to the first gas inlet through a first gas transfer pipe, and a first pressure reducing valve 13 is fixed at the first gas inlet;

[0055] Wherein, one end of the first gas transfer pipe far from the first vaporizer is inserted into the inner cavity of the alkalinity adjustment tank 1 to form a cross aeration; a first gas flow control valve is fixed on the first gas transfer pipe.

[0056] In the alkalinity adjustment tank, the input volume of wastewater is controlled by the water volume regulating valve, the input volume of sodium hydroxide solution is controlled by the first control valve, and the input pressure of carbon dioxide gas is controlled by the first pressure reducing valve. In the tank, carbon dioxide gas reacts with water to form carbonic acid, and the solution after mixing carbonic acid and sodium hydroxide enters the first flocculation tank through the connecting tank.

[0057] The first gas transfer pipe in the alkalinity adjustment tank forms a cross aeration device, which can fully make carbon dioxide gas combine with water to form carbonic acid. Cooperating with the input of backwashing high-pressure air, it can accelerate the reaction.

[0058] To further optimize the above technical solution and increase the reaction time of carbon dioxide gas and water, a backwashing high-pressure air inlet is also provided at the top of the alkalinity adjustment tank 1. The backwashing high-pressure air inlet is connected to the air supply device through an air pipe; a wind force regulating valve 14 is fixed at the backwashing high-pressure air inlet.

[0059] To further optimize the above technical solution, it further includes a first stirrer 21. The motor of the first stirrer 21 is fixed at the top of the first flocculation stirring tank 2, and its output shaft is inserted into the first flocculation stirring tank 2;

[0060] A coagulant aid inlet is provided at the top of the first flocculation stirring tank 2. The third diaphragm dosing pump is connected to the coagulant aid inlet through a coagulant aid transfer pipe, and a coagulant aid flow regulating valve 22 is fixed at the coagulant aid inlet.

[0061] In the first flocculation tank, a polyferric sulfate solution is introduced as a coagulant aid. The input volume of the polyferric sulfate solution is controlled by the coagulant aid flow regulating valve. The first stirrer is used to fully stir and mix the mixed liquid transported from the alkalinity adjustment tank with the polyferric sulfate solution, so that a chemical reaction occurs to produce magnesium carbonate and calcium carbonate precipitates. The precipitates in the alkalinity adjustment tank and the first flocculation tank can be collected through the first discharge valve.

[0062] To further optimize the above technical solution, a second softening agent inlet and a second gas inlet are respectively provided at the top of the lye tank 3;

[0063] The fourth diaphragm dosing pump is connected to the second softening agent inlet through a second softening agent delivery pipe, and a second control valve 32 is fixed at the second softening agent inlet; the second vaporizer is connected to the second gas inlet through a second gas delivery pipe, and a second pressure reducing valve 33 is fixed at the second gas inlet;

[0064] One end of the second gas delivery pipe away from the second vaporizer is inserted into the inner cavity of the lye tank 3 to form a cross aeration; a second gas flow control valve is fixed on the second gas delivery pipe.

[0065] The mixed liquid in the first flocculation tank enters the lye tank through the first overflow port at its bottom;

[0066] Sodium hydroxide solution and carbon dioxide gas are added for the second time in the lye tank for a secondary reaction. The precipitate formed after the reaction accumulates in the sedimentation tank at its bottom and can be collected and reused through the second discharge valve.

[0067] To further optimize the above technical solution, it further includes a second agitator 43. The motor of the second agitator 43 is fixed at the top of the second flocculation stirring tank 4, and its output shaft is inserted into the inner cavity of the second flocculation stirring tank 4;

[0068] A flocculant inlet is provided at the top of the second flocculation stirring tank 4. The fourth diaphragm dosing pump is connected to the flocculant inlet through a flocculant delivery pipe, and a polymerization flow regulating valve 42 is fixed at the flocculant inlet.

[0069] The precipitate in the lye tank accumulates in the sedimentation tank at its bottom, and the upper clear liquid enters the second flocculation stirring tank through the second overflow port;

[0070] Polyacrylamide solution is added as a flocculant in the second flocculation stirring tank. The clear liquid and the polyacrylamide solution are fully mixed evenly by the second agitator and undergo a polymerization reaction. The polymer produced precipitates in the sedimentation tank at its bottom and is collected and reused through the third discharge valve.

[0071] To further optimize the above technical solution, a inclined plate 52 is fixed on the inner wall of the first filter tank 5 between the third overflow port and the fourth overflow port;

[0072] The supernatant in the second flocculation stirring tank enters the first filter tank through the third overflow port. The first filter tank can extend the liquid residence time through the action of the inclined plate and make the impurities contained therein precipitate. The precipitated impurities can fall into the multiple sedimentation tanks at its bottom and be collected and reused through the fourth discharge valve.

[0073] To further optimize the above technical solution, a filter medium containing box 61 is fixed to the inner wall of the first filter tank 5 below the fourth overflow port; the water outlet valve 8 is arranged below the filter medium containing box 61.

[0074] The clear liquid in the first filter tank enters the second filter tank through the fourth overflow port;

[0075] The filter medium containing box in the second filter tank contains quartz sand and anthracite, which can play a role in filtering fine impurities. The filtered soft water flows into the water production tank through the water outlet valve.

[0076] To further optimize the above technical solution, the alkalinity adjustment tank, the first flocculation stirring tank, the alkali liquid tank, the second flocculation stirring tank, the first filter tank and the second filter tank are all made of steel and are welded and fixed to form a treatment system.

[0077] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0078] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-concentration wastewater softening treatment system, characterized in that, The system includes an alkalinity adjustment tank (1), a first flocculation stirring tank (2), an alkali solution tank (3), a second flocculation stirring tank (4), a first filtration tank (5) and a second filtration tank (6) that are connected in sequence; The top of the alkalinity adjustment tank (1) is connected through pipelines to a wastewater transfer pump, a first diaphragm chemical dosing pump for conveying sodium hydroxide solution, and a first vaporizer for dry ice gasification; the bottom of the first flocculation stirring tank (2) is connected to the bottom of the alkalinity adjustment tank (1) through a connection tank (7); the top of the first flocculation stirring tank (2) is connected through a pipeline to a third diaphragm chemical dosing pump for conveying polyferric sulfate solution; the top of the alkali solution tank (3) is connected through pipelines to a fourth diaphragm chemical dosing pump for conveying sodium hydroxide solution and a second vaporizer for dry ice gasification; the top of the second flocculation stirring tank (4) is connected through a pipeline to a fourth diaphragm chemical dosing pump for conveying polyacrylamide solution; a water outlet valve (8) is fixed at the bottom of the side wall of the second filtration tank (6) relative to the first filtration tank (5).

2. The high-concentration wastewater softening treatment system according to claim 1, wherein The top of the alkalinity adjustment tank is respectively provided with a wastewater inlet, a first softening agent inlet, and a first gas inlet; The wastewater transfer pump is connected to the wastewater inlet through a wastewater transfer pipe, and a water volume regulating valve (11) is fixed at the wastewater inlet; the first diaphragm chemical dosing pump is connected to the first softening agent inlet through a first softening agent transfer pipe, and a first control valve (12) is fixed at the first softening agent inlet; the first vaporizer is connected to the first gas inlet through a first gas transfer pipe, and a first pressure reducing valve (13) is fixed at the first gas inlet; Wherein, one end of the first gas transfer pipe away from the first vaporizer has a cross-shaped aeration head and can be inserted into the inner cavity of the alkalinity adjustment tank (1) to form a cross-shaped aeration track; a first gas flow control valve is fixed on the first gas transfer pipe.

3. The high-concentration wastewater softening treatment system according to claim 2, wherein, The top of the alkalinity adjustment tank (1) is further provided with an anti-flushing high-pressure air inlet, and the anti-flushing high-pressure air inlet is connected to an air supply device through an air pipe; a wind force regulating valve (14) is fixed at the anti-flushing high-pressure air inlet.

4. A high-concentration wastewater softening treatment system according to claim 1, characterized in that, It further includes a first stirrer (21), and the motor of the first stirrer (21) is fixed at the top of the first flocculation stirring tank (2) and its output shaft is inserted into the first flocculation stirring tank (2); The top of the first flocculation stirring tank (2) is provided with a coagulant aid inlet, and the third diaphragm chemical dosing pump is connected to the coagulant aid inlet through a coagulant aid transfer pipe, and a coagulant aid flow regulating valve (22) is fixed at the coagulant aid inlet.

5. A high-concentration wastewater softening treatment system according to claim 1, wherein, The top of the alkali solution tank (3) is respectively provided with a second softening agent inlet and a second gas inlet; The fourth diaphragm chemical dosing pump is connected to the second softening agent inlet through a second softening agent transfer pipe, and a second control valve (32) is fixed at the second softening agent inlet; the second vaporizer is connected to the second gas inlet through a second gas transfer pipe, and a second pressure reducing valve (33) is fixed at the second gas inlet; One end of the second gas delivery pipe away from the second vaporizer is inserted into the inner cavity of the lye tank (3) to form a cross-shaped aeration track; a second gas flow control valve is fixed on the second gas delivery pipe.

6. The high-concentration wastewater softening treatment system according to claim 1, characterized in that, It further includes a second agitator (43), the motor of the second agitator (43) is fixed at the top of the second flocculation stirring tank (4) and its output shaft is inserted into the inner cavity of the second flocculation stirring tank (4); A polymerizer inlet is provided at the top of the second flocculation stirring tank (4), the fourth diaphragm chemical dosing pump is connected to the polymerizer inlet through a polymerizer delivery pipe and a polymer flow regulating valve (42) is fixed at the polymerizer inlet.

7. A high-concentration wastewater softening treatment system according to any one of claims 1 to 6, characterized in that, A first overflow port is provided at the bottom end of the side wall between the first flocculation stirring tank (2) and the lye tank (3); a second overflow port is provided at the top end of the side wall between the lye tank (3) and the second flocculation stirring tank (4); a third overflow port is provided at the top end of the side wall between the second flocculation stirring tank (4) and the first filtration tank (5); a fourth overflow port is provided at the top end of the side wall between the first filtration tank (5) and the second filtration tank (6).

8. A high-concentration wastewater softening treatment system according to claim 7, characterized in that, An inclined plate (52) is fixed on the inner wall of the first filtration tank (5) between the third overflow port and the fourth overflow port; a filter medium accommodating box (61) is fixed on the inner wall of the first filtration tank (5) below the fourth overflow port; the water outlet valve (8) is arranged below the filter medium accommodating box (61).

9. The high-concentration wastewater softening treatment system according to claim 8, wherein, Conical sedimentation tanks are formed at the bottoms of the alkalinity adjustment tank (1), the first flocculation stirring tank (2), the lye tank (3), the second flocculation stirring tank (4), and the first filtration tank (5).

10. A high-concentration wastewater softening treatment system according to claim 9, characterized in that, A first discharge valve (71) is fixed at the bottom end of the connection tank (7); a second discharge valve (31) is fixed at the bottom end of the lye tank (3); a third discharge valve (41) is fixed at the bottom end of the second flocculation stirring tank (4); a plurality of fourth discharge valves (51) are fixed at the bottom end of the first filtration tank (5).

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