Desulfurization wastewater conditioning device

Abstract

The utility model relates to the technical field of wastewater zero discharge treatment, and discloses a desulfurization wastewater conditioning device. The desulfurization wastewater conditioning device comprises a wastewater supply unit (2), an alkali liquor supply unit (3) and a neutralization ejector (1), the neutralization ejector (1) comprises a neutralization section (11) and an ejection section (12) which are connected with each other, a wastewater inlet (13) is formed in the end, away from the ejection section (12), of the neutralization section (11), the wastewater inlet (13) is connected with the wastewater supply unit (2), and the alkali liquor supply unit (3) is connected with the neutralization section (11). An alkali liquor inlet (14) is formed in the side part of the neutralization section (11) and is connected with the alkali liquor supply unit (3); a mixed liquid outlet (15) is formed in one end, far away from the neutralizing section (11), of the spraying section (12). According to the technical scheme, the operation is simple when the concentrated wastewater is conditioned, the flow rate of sodium hydroxide is easier to adjust, and the conditioning efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of zero - discharge treatment of wastewater, and particularly relates to a desulfurization wastewater conditioning device. Background Art

[0002] The zero - discharge concentration technology of wastewater is an advanced wastewater treatment technology, and its technical background mainly stems from the pursuit of environmental protection and industrial sustainable development.

[0003] Conditioning of concentrated wastewater is an important step, aiming to make the concentrated wastewater more suitable for subsequent treatment processes. Since a large amount of water in the wastewater evaporates during the concentration process, resulting in a significant increase in the concentration of solutes in the wastewater, it is necessary to condition the concentrated wastewater to ensure the stability and efficiency of subsequent treatment processes.

[0004] In the traditional conditioning process, a conditioning tank is set up, and both the concentrated wastewater to be conditioned and the alkali solution need to be transported to the conditioning tank and stirred and neutralized by a stirrer to achieve the purpose of conditioning. This process has disadvantages such as unstable wastewater volume, large fluctuations in the flow rate of the conditioning liquid, and conditioning lag.

[0005] Therefore, it is urgent to develop a desulfurization wastewater conditioning device, which makes the operation of the concentrated wastewater during conditioning simple, easier to adjust the flow rate of sodium hydroxide, and improves the conditioning efficiency. Summary of the Utility Model

[0006] The purpose of the utility model is to overcome the problems existing in the prior art, such as unstable wastewater volume, large fluctuations in the flow rate of the conditioning liquid, and conditioning lag during the wastewater conditioning process. A desulfurization wastewater conditioning device is provided. This technical solution makes the operation of the concentrated wastewater during conditioning simple, easier to adjust the flow rate of sodium hydroxide, and improves the conditioning efficiency. Moreover, by adding a sodium hydroxide solution to contact and react with the concentrated wastewater in the neutralization ejector, the reaction time is guaranteed, the reaction efficiency is improved, and the neutralization efficiency of the wastewater pH value is improved.

[0007] To achieve the above purpose, the utility model provides a desulfurization wastewater conditioning device, which includes: a wastewater supply unit, an alkali solution supply unit, and a neutralization ejector. The neutralization ejector includes a neutralization section and an ejection section connected to each other. One end of the neutralization section far from the ejection section is provided with a wastewater inlet, the wastewater inlet is connected to the wastewater supply unit, and a side part of the neutralization section is provided with an alkali solution inlet, the alkali solution inlet is connected to the alkali solution supply unit; one end of the ejection section far from the neutralization section is provided with a mixed liquid outlet.

[0008] Preferably, the alkali solution supply unit includes an alkali solution tank and an alkali - supply metering pump, and the alkali - supply metering pump is arranged on the pipeline for the alkali solution tank to transport the alkali solution to the alkali solution inlet.

[0009] Preferably, the wastewater supply unit includes a wastewater incoming pipe, and a remote transmission flowmeter is arranged on the wastewater incoming pipe.

[0010] Preferably, a pH detection point is arranged on the output pipeline connected to the mixed liquid outlet. The lye supply unit further includes an adjustment module, and the adjustment module adjusts the lye flow rate delivered to the lye inlet according to the pH value detected at the pH detection point.

[0011] Preferably, the ratio of the distance L1 from the wastewater inlet to the lye inlet to the distance L from the wastewater inlet to the mixed liquid outlet is 1:(5 - 8).

[0012] Preferably, the ratio of the height H of the lye inlet to the distance L1 from the wastewater inlet to the lye inlet is 1:(1 - 2).

[0013] Preferably, the height H of the lye inlet is 100 - 200 mm.

[0014] Preferably, the distance L1 from the wastewater inlet to the lye inlet is 150 - 300 mm.

[0015] Preferably, the distance L from the wastewater inlet to the mixed liquid outlet is 900 - 1800 mm.

[0016] Preferably, the lye supply unit further includes a valve, and the valve is arranged on the pipeline for delivering lye from the lye tank to the lye inlet.

[0017] Compared with the prior art, the present utility model has the following technical effects:

[0018] (1) The desulfurized wastewater conditioning device of the present utility model has the characteristics of small floor area and simple device, and is suitable for being selected for renovation and new construction projects;

[0019] (2) By accelerating the flow rate of the wastewater in the neutralization ejector through the injection section, the conditioning efficiency is improved, the response time is shortened, and the technological process of wastewater conditioning is optimized;

[0020] (3) In a more preferred embodiment, the desulfurized wastewater conditioning device of the present utility model adjusts the lye flow rate delivered to the lye inlet according to the pH value detected at the pH detection point, solving the problem of slow pH feedback measured by the conditioning tank;

[0021] (4) The desulfurized wastewater conditioning device of the present utility model does not need to use equipment such as a conditioning tank, a stirrer, and a conditioning transfer pump, reducing the investment cost and the maintenance cost;

[0022] (5) In the desulfurized wastewater conditioning device of the present utility model, the selection range of the alkaline solution is wide, and various alkaline solutions such as lime milk and sodium hydroxide solution can be used as neutralizing agents.

[0023] In summary, the desulfurized wastewater conditioning device of the present utility model has the characteristics of being simple, organically integrated, convenient for maintenance and use, low loss of neutralizing agent, and high selectivity of neutralizing agent. It has the advantages of small floor area, high cost performance, high neutralization efficiency, and small consumption of neutralizing agent, and can make the wastewater conditioning process operate stably. Description of the Drawings

[0024] Figure 1 is a schematic structural diagram of the neutralization ejector of the present utility model;

[0025] Figure 2 is a schematic process flow diagram of the desulfurized wastewater conditioning device of the present utility model.

[0026] Description of the Reference Numerals

[0027] 1. Neutralization ejector; 11. Neutralization section; 12. Injection section; 13. Wastewater inlet; 14. Alkaline solution inlet; 15. Mixed liquid outlet; 2. Wastewater supply unit; 3. Alkaline solution supply unit; 31. Alkaline solution tank; 32. Alkaline solution supply metering pump; 33. Valve; 4. pH value detection point; 5. Slurry drying unit. Detailed Description of the Preferred Embodiments

[0028] The following will describe in detail the specific embodiments of the present utility model with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for the purpose of illustration and explanation of the present utility model, and are not intended to limit the present utility model.

[0029] In the ranges disclosed herein, the endpoints and any values are not limited to the exact ranges or values, and these ranges or values should be understood to include values close to these ranges or values. For numerical ranges, between the endpoint values of each range, between the endpoint values of each range and individual point values, and between individual point values, they can be combined with each other to obtain one or more new numerical ranges, and these numerical ranges should be regarded as specifically disclosed herein.

[0030] As Figure 1 shown, the desulfurized wastewater conditioning device of the present utility model includes: a wastewater supply unit 2, an alkaline solution supply unit 3, and a neutralization ejector 1, as Figure 2As shown, the neutralization injector 1 includes a neutralization section 11 and an injection section 12 connected to each other. One end of the neutralization section 11 away from the injection section 12 is provided with a waste water inlet 13, and the waste water inlet 13 is connected to the waste water supply unit 2. A lye inlet 14 is provided on the side of the neutralization section 11, and the lye inlet 14 is connected to the lye supply unit 3; One end of the injection section 12 away from the neutralization section 11 is provided with a mixed liquid outlet 15. According to the desulfurized waste water conditioning device of the present invention, the injection section 12 accelerates the flow rate of the waste water in the neutralization injector 1, improves the conditioning efficiency, shortens the response time, optimizes the technological process of waste water conditioning, and has the characteristics of small floor area and simple device.

[0031] In the desulfurized waste water conditioning device of the present invention, in order to realize real-time adjustment of the lye flow rate at the lye inlet, the lye supply unit 3 preferably includes a lye tank 31 and a lye supply metering pump 32. The lye supply metering pump 32 is preferably arranged on the pipeline for the lye tank 31 to transport lye to the lye inlet 14. The lye supply metering pump 32 can be used to adjust the lye flow rate at the lye inlet 14 in real time.

[0032] In the desulfurized waste water conditioning device of the present invention, the lye supply unit 3 may further include a valve 33, and the valve 33 may be arranged on the pipeline for the lye tank 31 to transport lye to the lye inlet 14. In the direction from the lye tank 31 to the lye inlet 14, the lye supply metering pump 32 and the valve 33 may be arranged in sequence. The lye is accelerated by the head of the lye supply metering pump 32 and the vacuum formed by the neutralization injector 1. The valve 33 is used to control the flow of the lye in the pipeline.

[0033] In the desulfurized waste water conditioning device of the present invention, in order to realize real-time adjustment of the lye flow rate at the lye inlet, the waste water supply unit 2 preferably includes a waste water incoming pipeline, and the waste water incoming pipeline is preferably equipped with a remote transmission flowmeter. The remote transmission flowmeter can be used as a basis for adjusting the lye flow rate at the lye inlet 14 during the desulfurized waste water conditioning process. The waste water can be accelerated through the injection section 12.

[0034] In the desulfurized waste water conditioning device of the present invention, in order to increase the reaction efficiency of adjusting the pH value and reduce the adjustment reaction time required for conditioning, a pH detection point 4 is preferably arranged on the output pipeline connected to the mixed liquid outlet 15. The lye supply unit 3 further preferably includes an adjustment module, and the adjustment module adjusts the lye flow rate transported to the lye inlet 14 according to the pH value detected by the pH detection point 4.

[0035] In the desulfurized wastewater conditioning device of the present utility model, in order to improve the conditioning efficiency, the ratio of the distance L1 from the wastewater inlet 13 to the lye inlet 14 to the distance L from the wastewater inlet 13 to the mixed liquid outlet 15 is preferably 1:(5 - 8), more preferably 1:(6 - 7).

[0036] In the desulfurized wastewater conditioning device of the present utility model, in order to improve the conditioning efficiency, the ratio of the height H of the lye inlet 14 to the distance L1 from the wastewater inlet 13 to the lye inlet 14 is preferably 1:(1 - 2), more preferably 1:(1.5 - 2).

[0037] In the desulfurized wastewater conditioning device of the present utility model, the height H of the lye inlet 14 can be 100 - 200 mm, preferably 150 - 180 mm. The distance L1 from the wastewater inlet 13 to the lye inlet 14 can be 150 - 300 mm, preferably 200 - 250 mm. The distance L from the wastewater inlet 13 to the mixed liquid outlet 15 can be 900 - 1800 mm, preferably 1200 - 1500 mm. The pipe diameters of the wastewater inlet 13 and the mixed liquid outlet 15 are determined according to the treatment volume of the wastewater. When the treatment volume of the wastewater is 2 m 3 / h, the pipe diameter of the wastewater inlet 13 can be DN20 - DN32, preferably DN25; the pipe diameter of the mixed liquid outlet 15 can be DN25 - DN40, preferably DN32.

[0038] In the desulfurized wastewater conditioning device of the present utility model, the slurry drying unit 5 can be a conventional device in the art for drying desulfurized wastewater slurry. Specifically, reference can be made to the patent application CN114772673A.

[0039] In some embodiments, as Figure 1 shown, the desulfurized wastewater conditioning device of the present utility model includes: a wastewater supply unit 2, a lye supply unit 3, a neutralization ejector 1, and a slurry drying unit 5, as Figure 2As shown in the figure, the neutralization injector 1 includes a neutralization section 11 and an injection section 12 which are connected to each other. One end of the neutralization section 11 away from the injection section 12 is provided with a waste water inlet 13, and the waste water inlet 13 is connected to the waste water supply unit 2. A lye inlet 14 is provided on the side of the neutralization section 11, and the lye inlet 14 is connected to the lye supply unit 3; one end of the injection section 12 away from the neutralization section 11 is provided with a mixed liquid outlet 15. The lye supply unit 3 includes a lye tank 31, a lye supply metering pump 32 and a valve 33. The lye supply metering pump 32 and the valve 33 are arranged in sequence in the direction from the lye tank 31 to the lye inlet 14. The waste water supply unit 2 includes a waste water incoming pipe, and the waste water incoming pipe is equipped with a remote transmission flowmeter. A pH detection point 4 is arranged on the output pipeline connected to the mixed liquid outlet 15. The lye supply unit 3 further includes an adjustment module, and the adjustment module adjusts the lye flow rate delivered to the lye inlet 14 according to the pH value detected by the pH detection point 4. The slurry drying unit 5 is used to dry the mixed liquid discharged through the mixed liquid outlet 15. The ratio of the distance L1 from the waste water inlet 13 to the lye inlet 14 to the distance L from the waste water inlet 13 to the mixed liquid outlet 15 is 1:(5 - 8). The ratio of the height H of the lye inlet 14 to the distance L1 from the waste water inlet 13 to the lye inlet 14 is 1:(1 - 2). The height H of the lye inlet 14 is 100 - 200 mm. The distance L1 from the waste water inlet 13 to the lye inlet 14 is 150 - 300 mm. The distance L from the waste water inlet 13 to the mixed liquid outlet 15 is 900 - 1800 mm.

[0040] The desulfurized waste water conditioning method described in the present utility model is carried out in the above-mentioned desulfurized waste water conditioning device, and this method includes the following steps:

[0041] (1) The lye in the lye tank 31 is successively passed through the lye supply metering pump 32 and the valve 33, and then is introduced into the neutralization injector 1 through the lye inlet 14;

[0042] (2) The waste water is successively passed through the waste water incoming pipe and is introduced into the neutralization injector 1 through the waste water inlet 13;

[0043] (3) The waste water passing through the waste water inlet 13 and the lye passing through the lye inlet 14 are mixed, and then are successively introduced into the injection section 12 and the neutralization section 11. The obtained mixed liquid is introduced into the pH detection point 4 through the mixed liquid outlet 15 to detect the pH value, and the lye flow rate delivered to the lye inlet 14 is adjusted according to the pH value detected by the pH detection point 4;

[0044] (4) Feed the mixed liquid obtained from the neutralization injector 1 into the slurry drying unit 5 through the mixed liquid outlet 15 to dry the mixed liquid.

[0045] According to the desulfurized wastewater conditioning method of the present invention, the wastewater passing through the wastewater inlet 13 and the alkali solution entering through the bypass of the neutralization injector at the alkali solution inlet 14 are mixed and sprayed, so as to achieve the purpose of neutralizing the wastewater, increase the reaction efficiency of adjusting the pH value, and reduce the adjustment reaction time required for conditioning.

[0046] In the desulfurized wastewater conditioning method of the present invention, the alkali solution in the alkali solution tank 31 can be lime milk and / or sodium hydroxide solution, preferably sodium hydroxide solution. The mass concentration of the alkali solution in the alkali solution tank 31 can be 10%-40%, preferably 30%-40%. The pH value of the alkali solution in the alkali solution tank 31 can be 13-14, preferably 13.5-14. The flow rate of the alkali solution passing through the alkali supply metering pump 32 can be 0.5-2.5 m / s, preferably 1-1.5 m / s.

[0047] In the desulfurized wastewater conditioning method of the present invention, the flow rate of the wastewater passing through the wastewater incoming pipe can be 1-2 m / s, preferably 1.5-2 m / s; the pH value can be 0-1.

[0048] In the desulfurized wastewater conditioning method of the present invention, the flow rate of the mixed liquid passing through the spraying section 12 can be 4.5-6 m / s, preferably 5-6 m / s; the pressure can be 0.25-0.4 MPa, preferably 0.3-0.4 MPa. Accelerating the flow rate through the spraying section 12 is to make the liquid phase form a turbulent flow, achieve rapid reaction and uniform mixing. Here, the pressure is gauge pressure.

[0049] In the desulfurized wastewater conditioning method of the present invention, the flow rate of the mixed liquid passing through the mixed liquid outlet 15 can be 1-2 m / s, preferably 1.5-2 m / s; the pH value can be 6.5-7.5, preferably 6.8-7.2.

[0050] In the desulfurized wastewater conditioning method of the present invention, when the pH value detected by the pH detection point 4 is greater than 7.5, the flow rate of the alkali solution delivered to the alkali solution inlet 14 is reduced through the adjustment module to control the pH value detected by the pH detection point 4 to be 6.5-7.5; when the pH value detected by the pH detection point 4 is less than 6.5, the flow rate of the alkali solution delivered to the alkali solution inlet 14 is increased through the adjustment module to control the pH value detected by the pH detection point 4 to be 6.5-7.5.

[0051] In some embodiments, the desulfurized wastewater conditioning method of the present utility model is carried out in the above-mentioned desulfurized wastewater conditioning device, and this method includes the following steps:

[0052] (1) The lye in the lye tank 31 with a mass concentration of 10%-40% and a pH value of 14 is sequentially passed through the lye supply metering pump 32 and the valve 33, and then passes through the lye inlet 14 into the neutralization injector 1; the flow rate of the lye passing through the lye supply metering pump 32 is 2-2.5 m / s; the flow rate of the lye passing through the lye inlet 14 is 1-1.5 m / s;

[0053] (2) The wastewater with a pH value of 0-1 is sequentially passed through the wastewater incoming pipe and the remote transmission flowmeter, and then passes through the wastewater inlet 13 into the neutralization injector 1; the flow rate of the wastewater passing through the wastewater incoming pipe is 1-2 m / s;

[0054] (3) The wastewater passing through the wastewater inlet 13 and the lye passing through the lye inlet 14 are mixed, and then are sequentially passed into the injection section 12 and the neutralization section 11. The obtained mixed liquid passes through the mixed liquid outlet 15 at a flow rate of 1-2 m / s into the pH detection point 4 for pH value detection. The flow rate of the lye transported to the lye inlet 14 is adjusted according to the pH value detected by the pH detection point 4; when the pH value detected by the pH detection point 4 is greater than 7.5, the flow rate of the lye transported to the lye inlet 14 is reduced through the adjustment module to control the pH value detected by the pH detection point 4 to be 6.5-7.5; when the pH value detected by the pH detection point 4 is less than 6.5, the flow rate of the lye transported to the lye inlet 14 is increased through the adjustment module to control the pH value detected by the pH detection point 4 to be 6.5-7.5; the flow rate of the mixed liquid passing through the injection section 12 is 4.5-6 m / s, and the pressure is 0.25-0.4 MPa;

[0055] (4) The mixed liquid obtained from the neutralization injector 1 passes through the mixed liquid outlet 15 at a flow rate of 1-2 m / s into the slurry drying unit 5 for drying.

[0056] The following further illustrates the desulfurized wastewater conditioning device of the present utility model through examples. The examples are implemented on the premise of the technical solution of the present utility model, and detailed implementation manners and specific operation processes are given, but the protection scope of the present utility model is not limited to the following examples.

[0057] The experimental methods in the following examples are all conventional methods in the art unless otherwise specified. The experimental materials used in the following examples can all be commercially obtained unless otherwise specified.

[0058] Example 1

[0059] This embodiment is implemented in the desulfurized wastewater conditioning device shown in Figure 1 Specifically, the device includes a wastewater supply unit 2, an alkali solution supply unit 3, a neutralization ejector 1, and a slurry drying unit 5. As shown in Figure 2 , the neutralization ejector 1 includes a neutralization section 11 and an ejection section 12 connected to each other. One end of the neutralization section 11 away from the ejection section 12 is provided with a wastewater inlet 13, the wastewater inlet 13 is connected to the wastewater supply unit 2, and a side portion of the neutralization section 11 is provided with an alkali solution inlet 14, the alkali solution inlet 14 is connected to the alkali solution supply unit 3; one end of the ejection section 12 away from the neutralization section 11 is provided with a mixed liquid outlet 15. The alkali solution supply unit 3 includes an alkali solution tank 31, an alkali supply metering pump 32, and a valve 33. The alkali supply metering pump 32 and the valve 33 are sequentially arranged in the direction from the alkali solution tank 31 to the alkali solution inlet 14. The wastewater supply unit 2 includes a wastewater incoming pipeline, and the wastewater incoming pipeline is configured with a remote transmission flowmeter and a wastewater incoming pipeline. A pH detection point 4 is arranged on the output pipeline connected to the mixed liquid outlet 15. The alkali solution supply unit 3 further includes an adjustment module, and the adjustment module adjusts the alkali solution flow rate delivered to the alkali solution inlet 14 according to the pH value detected by the pH detection point 4. The slurry drying unit 5 is used to dry the mixed liquid discharged through the mixed liquid outlet 15. The height H of the alkali solution inlet 14 is 200 mm. The distance L1 from the wastewater inlet 13 to the alkali solution inlet 14 is 200 mm. The distance L from the wastewater inlet 13 to the mixed liquid outlet 15 is 1000 mm. The pipe diameter of the wastewater inlet 13 is DN25. The pipe diameter of the mixed liquid outlet 15 is DN32.

[0060] The specific process of desulfurized wastewater conditioning is as follows:

[0061] (1) The sodium hydroxide solution with a mass concentration of 30% and a pH value of 14 in the alkali solution tank 31 is sequentially passed through the alkali supply metering pump 32 and the valve 33, and then enters the neutralization ejector 1 through the alkali solution inlet 14; the flow rate of the sodium hydroxide solution passing through the alkali supply metering pump 32 is 2 m / s; the flow rate of the sodium hydroxide solution passing through the alkali solution inlet 14 is 1.5 m / s;

[0062] (2) The wastewater with a pH value of 0.5 is sequentially passed through the wastewater incoming pipeline and the remote transmission flowmeter, and then enters the neutralization ejector 1 through the wastewater inlet 13; the flow rate of the wastewater passing through the wastewater incoming pipeline is 2 m / s;

[0063] (3) Mix the wastewater passing through the wastewater inlet 13 and the sodium hydroxide solution passing through the lye inlet 14, then successively introduce them into the injection section 12 and the neutralization section 11. The obtained mixed liquid passes through the mixed liquid outlet 15 and is introduced into the pH detection point 4 at a flow rate of 2 m / s to detect the pH value. Adjust the flow rate of the lye delivered to the lye inlet 14 according to the pH value detected at the pH detection point 4. When the pH value detected at the pH detection point 4 is greater than 7.5, reduce the flow rate of the lye delivered to the lye inlet 14 through the adjustment module to control the pH value detected at the pH detection point 4 to be 6.5 - 7.5. When the pH value detected at the pH detection point 4 is less than 6.5, increase the flow rate of the lye delivered to the lye inlet 14 through the adjustment module to control the pH value detected at the pH detection point 4 to be 6.5 - 7.5. The flow rate of the mixed liquid passing through the injection section 12 is 5 m / s, and the pressure is 0.3 MPa;

[0064] (4) Pass the mixed liquid obtained from the neutralization injector 1 through the mixed liquid outlet 15 and introduce it into the slurry drying unit 5 at a flow rate of 2 m / s to dry the mixed liquid for 3.5 min under the condition of a temperature of 150 °C.

[0065] Example 2

[0066] Configure the desulfurized wastewater conditioning device according to Example 1, except that the height H of the lye inlet 14 is 150 mm, the distance L1 from the wastewater inlet 13 to the lye inlet 14 is 300 mm, and the distance L from the wastewater inlet 13 to the mixed liquid outlet 15 is 1800 mm.

[0067] The specific process of desulfurized wastewater conditioning is as follows:

[0068] (1) Pass the sodium hydroxide solution with a mass concentration of 30% and a pH value of 14 in the lye tank 31 through the lye supply metering pump 32 and the valve 33 in sequence, and then introduce it into the neutralization injector 1 through the lye inlet 14. The flow rate of the sodium hydroxide solution passing through the lye supply metering pump 32 is 2.5 m / s. The flow rate of the sodium hydroxide solution passing through the lye inlet 14 is 2 m / s;

[0069] (2) Pass the wastewater with a pH value of 2 through the wastewater incoming pipe and the remote flow meter in sequence, and then introduce it into the neutralization injector 1 through the wastewater inlet 13. The flow rate of the wastewater passing through the wastewater incoming pipe is 1 m / s;

[0070] (3) Mix the wastewater passing through the wastewater inlet 13 and the sodium hydroxide solution passing through the lye inlet 14, then successively introduce them into the injection section 12 and the neutralization section 11. The obtained mixed liquid passes through the mixed liquid outlet 15 and is introduced into the pH detection point 4 at a flow rate of 1 m / s to detect the pH value. Adjust the flow rate of the lye transported to the lye inlet 14 according to the pH value detected at the pH detection point 4. When the pH value detected at the pH detection point 4 is greater than 7.5, reduce the flow rate of the lye transported to the lye inlet 14 through the adjustment module to control the pH value detected at the pH detection point 4 to be 6.5 - 7.5. When the pH value detected at the pH detection point 4 is less than 6.5, increase the flow rate of the lye transported to the lye inlet 14 through the adjustment module to control the pH value detected at the pH detection point 4 to be 6.5 - 7.5. The flow rate of the mixed liquid passing through the injection section 12 is 4.5 m / s, and the pressure is 0.25 MPa;

[0071] (4) Pass the mixed liquid obtained from the neutralization injector 1 through the mixed liquid outlet 15 and introduce it into the slurry drying unit 5 at a flow rate of 1 m / s to dry the mixed liquid for 4 min under the condition of a temperature of 135°C.

[0072] Example 3

[0073] Configure the desulfurized wastewater conditioning device according to Example 1. The difference is that the height H of the lye inlet 14 is 100 mm, the distance L1 from the wastewater inlet 13 to the lye inlet 14 is 150 mm, and the distance L from the wastewater inlet 13 to the mixed liquid outlet 15 is 1200 mm.

[0074] The specific process of desulfurized wastewater conditioning is as follows:

[0075] (1) Pass the sodium hydroxide solution with a mass concentration of 30% and a pH value of 14 in the lye tank 31 through the alkali supply metering pump 32 and the valve 33 in sequence, and then introduce it into the neutralization injector 1 through the lye inlet 14. The flow rate of the sodium hydroxide solution passing through the alkali supply metering pump 32 is 1 m / s. The flow rate of the sodium hydroxide solution passing through the lye inlet 14 is 1 m / s.

[0076] (2) Pass the wastewater with a pH value of 1 through the wastewater incoming pipe and the remote transmission flowmeter in sequence, and then introduce it into the neutralization injector 1 through the wastewater inlet 13. The flow rate of the wastewater passing through the wastewater incoming pipe is 2 m / s.

[0077] (3) Mix the wastewater passing through the wastewater inlet 13 and the sodium hydroxide solution passing through the lye inlet 14, then sequentially introduce them into the injection section 12 and the neutralization section 11. The obtained mixed solution passes through the mixed solution outlet 15 and is introduced into the pH detection point 4 at a flow rate of 2 m / s to detect the pH value. Adjust the flow rate of the lye transported to the lye inlet 14 according to the pH value detected by the pH detection point 4; when the pH value detected by the pH detection point 4 is greater than 7.5, reduce the flow rate of the lye transported to the lye inlet 14 through the adjustment module to control the pH value detected by the pH detection point 4 to be 6.5 - 7.5; when the pH value detected by the pH detection point 4 is less than 6.5, increase the flow rate of the lye transported to the lye inlet 14 through the adjustment module to control the pH value detected by the pH detection point 4 to be 6.5 - 7.5; the flow rate of the mixed solution passing through the injection section 12 is 6 m / s and the pressure is 0.3 MPa;

[0078] (4) Pass the mixed solution obtained from the neutralization injector 1 through the mixed solution outlet 15 and introduce it into the slurry drying unit 5 at a flow rate of 2 m / s to dry the mixed solution for 3 minutes under the condition of a temperature of 150 °C.

[0079] It can be seen from the above embodiments that in the desulfurization wastewater conditioning process carried out in the desulfurization wastewater conditioning device of the present invention, the setting of the conditioning tank and the agitator is reduced, and the reaction efficiency of adjusting the pH value is increased and the adjustment reaction time required for conditioning is reduced.

[0080] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, including any other suitable combination of each technical feature. These simple modifications and combinations should also be regarded as the content disclosed by the present invention and fall within the protection scope of the present invention.

Claims

1. A desulfurized wastewater conditioning device, characterized in that, The desulfurized wastewater conditioning device includes: a wastewater supply unit (2), an alkali solution supply unit (3), and a neutralization ejector (1). The neutralization ejector (1) includes a neutralization section (11) and an ejection section (12) connected to each other. One end of the neutralization section (11) away from the ejection section (12) is provided with a wastewater inlet (13). The wastewater inlet (13) is connected to the wastewater supply unit (2), and a side portion of the neutralization section (11) is provided with an alkali solution inlet (14). The alkali solution inlet (14) is connected to the alkali solution supply unit (3). One end of the ejection section (12) away from the neutralization section (11) is provided with a mixed solution outlet (15).

2. The desulfurized wastewater conditioning device according to claim 1, wherein The alkali solution supply unit (3) includes an alkali solution tank (31) and an alkali supply metering pump (32). The alkali supply metering pump (32) is arranged on the pipeline for the alkali solution tank (31) to transport the alkali solution to the alkali solution inlet (14).

3. The desulfurized wastewater conditioning device according to claim 2, characterized in that, The wastewater supply unit (2) includes a wastewater incoming pipeline, and the wastewater incoming pipeline is configured with a remote transmission flowmeter.

4. The desulfurized wastewater conditioning device according to claim 3, characterized in that, A pH detection point (4) is arranged on the output pipeline connected to the mixed solution outlet (15). The alkali solution supply unit (3) further includes an adjustment module. The adjustment module adjusts the alkali solution flow rate transported to the alkali solution inlet (14) according to the pH value detected by the pH detection point (4).

5. The desulfurized wastewater conditioning device according to claim 4, characterized in that, The ratio of the distance L1 from the wastewater inlet (13) to the alkali solution inlet (14) to the distance L from the wastewater inlet (13) to the mixed solution outlet (15) is 1:(5 - 8).

6. The desulfurized wastewater conditioning device according to claim 5, wherein, The ratio of the height H of the alkali solution inlet (14) to the distance L1 from the wastewater inlet (13) to the alkali solution inlet (14) is 1:(1 - 2).

7. The desulfurized wastewater conditioning device according to claim 6, characterized in that The height H of the alkali solution inlet (14) is 100 - 200 mm.

8. The desulfurized wastewater conditioning device according to claim 6, characterized in that The distance L1 from the wastewater inlet (13) to the alkali solution inlet (14) is 150 - 300 mm.

9. The desulfurized wastewater conditioning device according to claim 6, characterized in that, The distance L from the wastewater inlet (13) to the mixed solution outlet (15) is 900 - 1800 mm.

10. The desulfurized wastewater conditioning device according to any one of claims 5-9, characterized in that, The alkali solution supply unit (3) further includes a valve (33). The valve (33) is arranged on the pipeline for the alkali solution tank (31) to transport the alkali solution to the alkali solution inlet (14).

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