CN213066078U - Device for reducing pH value of boiler blow-down water - Google Patents
Device for reducing pH value of boiler blow-down water Download PDFInfo
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- CN213066078U CN213066078U CN202022012271.2U CN202022012271U CN213066078U CN 213066078 U CN213066078 U CN 213066078U CN 202022012271 U CN202022012271 U CN 202022012271U CN 213066078 U CN213066078 U CN 213066078U
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Abstract
The utility model relates to a reduce device of boiler blow-down water pH value, including boiler blow-down water pipeline and along boiler blow-down water flow direction set gradually the automatic acidification unit, pH regulating unit and blowdown cooling tank on boiler blow-down water pipeline, be equipped with the discharge pipe who is linked together with municipal sewage pipeline on this blowdown cooling tank. Compared with the prior art, the utility model adopts the mode of adding acid solution to adjust the pH value, not only can utilize the acid-base neutralization principle to quickly reduce the pH value of the boiler blow-off water, but also avoids the resource waste problem of the tap water dilution method, thereby effectively reducing the cost; by arranging the circulating pipeline, the pH value of the boiler sewage can be repeatedly adjusted in a circulating and multiple-time adjusting mode until the target range is reached, the discharge requirement is met, and the reliability is higher; the automatic regulation and control of the pH monitor, the electromagnetic three-way valve and the flow control valve through the controller greatly simplifies the operation process and improves the efficiency.
Description
Technical Field
The utility model belongs to the technical field of boiler blow off water treatment, a reduce device of boiler blow off water pH value is related to.
Background
Boiler pollution discharge is to discharge boiler water polluted by salt and water slag in a boiler periodically, and comprises continuous pollution discharge and periodic pollution discharge. The aim of continuous sewage discharge is to discharge part of salt dissolved in the boiler water so as to maintain certain salt content and alkalinity of the boiler water. The sewage is continuously discharged from the evaporation surface with the maximum salt concentration of the boiler water, and is also called surface sewage.
Generally speaking, the continuous blowdown water of the boiler accounts for about 6% of the steam amount of the boiler, has a pH value of about 11, and is discharged into a blowdown cooling tank after being cooled by a continuous blowdown expander. However, the pH value of the boiler sewage is too high, so that the requirement that the pH value of the discharged sewage is 6.5-9.5 specified by GBT31962-2015 Water quality Standard for wastewater discharged to cities and towns is not met. At present, most boiler rooms dilute boiler blow-down water by using tap water so as to reduce the pH value of the boiler blow-down water, but the method has high cost and wastes resources.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a reduce device of boiler blow-off water pH value can still have low-cost advantage when reducing boiler blow-off water pH value.
The purpose of the utility model can be realized through the following technical scheme:
the utility model provides a reduce device of boiler blow-down water pH value, the device include boiler blow-down water pipeline and set gradually the automatic acidification unit, pH adjusting unit and blowdown cooling tank on boiler blow-down water pipeline along boiler blow-down water flow direction, be equipped with the discharge pipe who is linked together with municipal sewage pipeline on this blowdown cooling tank.
Further, the device also comprises a controller which is respectively and electrically connected with the automatic acid adding unit and the pH adjusting unit. The controller regulates and controls the acid adding process and the pH adjusting process to ensure that the finally discharged boiler wastewater meets the pH discharge requirement.
Further, the controller is a PLC controller.
Furthermore, the automatic acid adding unit comprises an acid liquor pipeline communicated with the boiler sewage draining pipeline and an acid liquor storage tank arranged at one end of the acid liquor pipeline. Acid liquor (for example, dilute sulfuric acid with the mass percentage of about 2%) is stored in the acid liquor storage tank, and the acid liquor in the acid liquor storage tank is conveyed to a boiler sewage discharge pipeline through an acid liquor pipeline to be primarily mixed with boiler sewage discharge water, so that the pH value of the boiler sewage discharge water is reduced.
Furthermore, a flow control valve is arranged on the acid liquor pipeline and electrically connected with the controller. And calculating to obtain a flow ratio standard value of the acid liquor and the boiler sewage according to the pH value of the acid liquor and the initial pH value of the boiler sewage, and regulating and controlling the conveying amount of the acid liquor by using a flow control valve to meet the requirement.
Further, the pH adjusting unit comprises a mixing tank and a pH monitor which are sequentially arranged on the boiler sewage discharging pipeline along the flowing direction of the boiler sewage, and the pH monitor is electrically connected with the controller. The primarily mixed acid liquor and boiler blow-down water are further fully mixed in a mixing tank, and then are continuously conveyed to the downstream through a boiler blow-down water pipeline; when the boiler blow-down water passes through the position of the pH monitor, the pH monitor monitors the pH value of the boiler blow-down water mixed with the acid liquor at the moment to judge whether the requirement is met (the pH value is about 8) or not and feed back the information to the controller.
Furthermore, the pH adjusting unit also comprises a circulating pipeline, wherein both ends of the circulating pipeline are communicated with the boiler sewage draining pipeline, the outlet end of the circulating pipeline is positioned at the upstream of the mixing tank, and the inlet end of the circulating pipeline is positioned at the downstream of the pH monitor. If the pH value of the boiler blow-off water mixed with the acid liquor meets the discharge requirement, directly entering a blow-off cooling pool; if the pH value of the boiler sewage mixed with the acid liquor exceeds the required range, the boiler sewage mixed with the acid liquor is introduced into a circulating pipeline and is returned to the upstream of the mixing tank again, the controller is used for adjusting the flow control valve, the conveying amount of the acid liquor is correspondingly adjusted and is mixed with the boiler sewage, and the pH value of the boiler sewage reaches the set range through continuous adjustment.
Furthermore, a three-way valve is also arranged on the boiler sewage discharge pipeline, the three-way valve is positioned at the downstream of the pH monitor, and the inlet end of the circulating pipeline is connected with the three-way valve. The three-way valve comprises an inlet end and two outlet ends, when the pH value of the boiler sewage mixed with the acid liquor reaches the discharge requirement, the outlet end of the three-way valve connected with the blowdown cooling tank is opened, and the outlet end connected with the circulating pipeline is closed, so that the boiler sewage is discharged into the blowdown cooling tank; if the pH value of the boiler sewage mixed with the acid liquor exceeds the required range, the outlet end of the three-way valve connected with the sewage cooling tank is closed, and the outlet end connected with the circulating pipeline is opened, so that the boiler sewage enters the circulating pipeline and returns to the upstream of the mixing tank again, and the pH value of the boiler sewage is further adjusted until the set range is reached.
Furthermore, the three-way valve is an electromagnetic three-way valve, and the electromagnetic three-way valve is electrically connected with the controller. And after receiving the pH value signal fed back by the pH monitor, the controller automatically adjusts the working state of the electromagnetic three-way valve and controls each outlet end of the electromagnetic three-way valve to be opened or closed.
Furthermore, the circulating pipeline and the acid liquor pipeline are both provided with pumps. The pump can increase the liquid pressure, promote the liquid flow, and control the flow direction, avoid taking place the reverse flow.
The utility model discloses when the in-service use, boiler blow-off water among the boiler blow-off water pipeline is at the flow in-process, earlier with the automatic acidizing fluid that carries in the unit of acidification according to certain proportion preliminary mixing, later further adjust the pH to the target range of boiler blow-off water in the pH adjusting unit, reach emission standard's boiler blow-off water and get into at last in the blowdown cooling tank and discharge to municipal sewage pipeline by the discharge pipeline.
Compared with the prior art, the utility model has the characteristics of it is following:
1) by adopting the mode of adding acid liquor to adjust the pH value, the pH value of the boiler blow-off water can be quickly reduced by utilizing the acid-base neutralization principle, the problem of resource waste in a tap water dilution method is avoided, and the cost is effectively reduced;
2) by arranging the circulating pipeline, the pH value of the boiler sewage can be repeatedly adjusted in a circulating and multiple-time adjusting mode until the target range is reached, the discharge requirement is met, and the reliability is higher;
3) the automatic regulation and control of the pH monitor, the electromagnetic three-way valve and the flow control valve through the controller greatly simplifies the operation process and improves the efficiency.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
the notation in the figure is:
1-boiler drainage and sewage pipeline, 2-blowdown cooling pool, 3-discharge pipeline, 4-acid liquor pipeline, 5-acid liquor storage tank, 6-flow control valve, 7-controller, 8-mixing tank, 9-pH monitor, 10-circulation pipeline, 11-three-way valve and 12-pump.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Example (b):
the device for reducing the pH value of the boiler blow-down water comprises a boiler blow-down water pipeline 1, and an automatic acid adding unit, a pH adjusting unit and a blow-down cooling pool 2 which are sequentially arranged on the boiler blow-down water pipeline 1 along the flowing direction of the boiler blow-down water, wherein a discharge pipeline 3 communicated with a municipal sewage pipeline is arranged on the blow-down cooling pool 2. The device also comprises a controller 7 which is respectively and electrically connected with the automatic acid adding unit and the pH adjusting unit. The controller 7 is a PLC controller.
The automatic acid adding unit comprises an acid liquor pipeline 4 communicated with the boiler sewage draining pipeline 1 and an acid liquor storage tank 5 arranged at one end of the acid liquor pipeline 4. The acid liquor pipeline 4 is provided with a flow control valve 6, and the flow control valve 6 is electrically connected with a controller 7.
The pH adjusting unit comprises a mixing tank 8 and a pH monitor 9 which are sequentially arranged on the boiler sewage discharging pipeline 1 along the flowing direction of the boiler sewage, and the pH monitor 9 is electrically connected with the controller 7. The pH adjusting unit further comprises a circulation pipe 10, both ends of the circulation pipe 10 are in communication with the boiler blow-down pipe 1, and the outlet end of the circulation pipe 10 is located upstream of the mixing tank 8 and the inlet end is located downstream of the pH monitor 9.
The boiler blow-down pipe 1 is also provided with a three-way valve 11, the three-way valve 11 is located downstream of the pH monitor 9, and the inlet end of the circulation pipe 10 is connected to the three-way valve 11. The three-way valve 11 is an electromagnetic three-way valve, and is electrically connected to the controller 7. The circulating pipeline 10 and the acid liquor pipeline 4 are both provided with pumps 12.
In practical application, in the flowing process of boiler sewage in the boiler sewage discharge pipeline 1, the boiler sewage is firstly preliminarily mixed with acid liquor conveyed from the automatic acid adding unit according to a certain proportion, then the pH of the boiler sewage is further adjusted to about 8 in the pH adjusting unit, and the boiler sewage reaching the discharge standard finally enters the sewage discharging and cooling tank 2 and is discharged to the municipal sewage pipeline through the discharge pipeline 3.
The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention according to the disclosure of the present invention.
Claims (10)
1. The utility model provides a reduce device of boiler blow-down water pH value, its characterized in that, the device include boiler blow-down water pipeline (1) and set gradually the automation on boiler blow-down water pipeline (1) along boiler blow-down water flow direction and add sour unit, pH adjusting unit and blowdown cooling tank (2), be equipped with on this blowdown cooling tank (2) with municipal sewage pipeline linked together's discharge conduit (3).
2. The apparatus for lowering the pH of boiler blow-down water according to claim 1, further comprising a controller (7) electrically connected to the automatic acid adding unit and the pH adjusting unit, respectively.
3. The apparatus for lowering the pH value of boiler blow-down water according to claim 2, characterized in that the controller (7) is a PLC controller.
4. The apparatus for lowering the pH of boiler blow-down water according to claim 2, wherein the automatic acid adding unit comprises an acid liquid pipe (4) connected to the boiler blow-down water pipe (1) and an acid liquid storage tank (5) disposed at one end of the acid liquid pipe (4).
5. The device for reducing the pH value of boiler blow-down water according to claim 4, characterized in that the acid liquor pipeline (4) is provided with a flow control valve (6), and the flow control valve (6) is electrically connected with the controller (7).
6. The apparatus for lowering the pH of boiler blow-down water according to claim 4, wherein the pH adjusting unit comprises a mixing tank (8) and a pH monitor (9) sequentially disposed on the boiler blow-down water pipe (1) along the flowing direction of the boiler blow-down water, and the pH monitor (9) is electrically connected to the controller (7).
7. The apparatus for lowering the pH of boiler blow-down water according to claim 6, characterized in that the pH adjusting unit further comprises a circulation pipe (10), both ends of the circulation pipe (10) are communicated with the boiler blow-down water pipe (1), and the outlet end of the circulation pipe (10) is located upstream of the mixing tank (8) and the inlet end is located downstream of the pH monitor (9).
8. The apparatus for lowering the pH of boiler blow-down water according to claim 7, characterized in that the boiler blow-down water pipe (1) is further provided with a three-way valve (11), the three-way valve (11) is located downstream of the pH monitor (9), and the inlet end of the circulation pipe (10) is connected with the three-way valve (11).
9. The apparatus for lowering the pH of boiler blow-down water according to claim 8, characterized in that said three-way valve (11) is an electromagnetic three-way valve, which is electrically connected to the controller (7).
10. The apparatus for lowering the pH of boiler blow-down water according to claim 7, characterized in that the circulating pipe (10) and the acid liquor pipe (4) are provided with pumps (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022012271.2U CN213066078U (en) | 2020-09-15 | 2020-09-15 | Device for reducing pH value of boiler blow-down water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022012271.2U CN213066078U (en) | 2020-09-15 | 2020-09-15 | Device for reducing pH value of boiler blow-down water |
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| Publication Number | Publication Date |
|---|---|
| CN213066078U true CN213066078U (en) | 2021-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022012271.2U Active CN213066078U (en) | 2020-09-15 | 2020-09-15 | Device for reducing pH value of boiler blow-down water |
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| Country | Link |
|---|---|
| CN (1) | CN213066078U (en) |
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2020
- 2020-09-15 CN CN202022012271.2U patent/CN213066078U/en active Active
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