Water-saving and emission-reducing device for industrial circulating water

Abstract

The utility model discloses a water-saving and emission-reducing device for industrial circulating water, which relates to the technical field of chemical equipment and comprises a plurality of mechanical seal water collection branch pipes, a circulating water collection tank, a mechanical seal water collection header pipe, a PH (potential of hydrogen) detection device and a switching valve group. The mechanical seal water collecting branch pipe is connected with the pump equipment group and is used for collecting cooling water of a mechanical seal of the pump equipment group; the circulating water collecting tank is used for storing cooling water; the mechanical seal water collecting header pipe is communicated with the circulating water collecting tank, and the mechanical seal water collecting branch pipes are communicated with the circulating water collecting tank through the mechanical seal water collecting header pipe; the PH detection device is arranged on the mechanical seal water collecting header pipe and is used for measuring the pH value in the mechanical seal water collecting header pipe; the switching valve group is arranged on the mechanical seal water collecting header pipe, the switching valve group is connected with a ground discharging pipe, and the switching valve group can discharge the cooling water in the mechanical seal water collecting header pipe into the ground discharging pipe when the pH value of the cooling water is unqualified. Cooling water can be recycled, and waste of water resources is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to chemical equipment technical field, especially relates to a kind of industrial circulating water water-saving emission reduction device. BACKGROUND

[0002] Smelting waste acid is heavy metal pollution wastewater with sulfuric acid as main component, mainly containing Hg, As, Cd, Pb, Cu, Zn and other toxic heavy metal ions and fluoride compound pollutants. Its typical characteristics are: strong acidity, high toxicity, ecological hazard. Usually, heavy metals in waste acid are purified and impurities are removed by sulfidation method+ waste acid evaporation concentration technology, and then fluoride, chlorine and other corrosive ions are removed, and sulfuric acid is concentrated, to change waste acid into sulfuric acid resource reuse of certain concentration. Pump equipment is one of the core equipment in the treatment process, and mechanical seal generates heat between dynamic ring and static ring during work, which needs to be cooled by circulating water. To prevent waste acid from leaking into the mechanical seal water in the traditional mechanical seal cooling of waste acid system, the mechanical seal water can only be used once and directly discharged. The water consumption of a single pump is about 50-80kg / h, which causes great waste of water resources. SUMMARY

[0003] The utility model aims at at least solving one of the technical problems existing in prior art. To this end, the utility model provides an industrial circulating water water-saving emission reduction device, which can recycle cooling water and reduce water resource waste.

[0004] According to the industrial circulating water water-saving emission reduction device provided by the utility model, the mechanical seal water collecting branch pipe is connected with pump equipment group, the mechanical seal water collecting branch pipe is used for collecting the cooling water of mechanical seal of the pump equipment group, the circulating water collecting tank is used for storing cooling water, the mechanical seal water collecting main pipe is connected with the circulating water collecting tank in communication, the mechanical seal water collecting branch pipe is connected with the circulating water collecting tank in communication through the mechanical seal water collecting main pipe, the PH detection device is arranged in the mechanical seal water collecting main pipe, the PH detection device is used for measuring the pH value in the mechanical seal water collecting main pipe, and the switching valve group is arranged in the mechanical seal water collecting main pipe, the switching valve group is connected with drain pipe, and the switching valve group can discharge the cooling water in the mechanical seal water collecting main pipe into the drain pipe when the pH value of cooling water is unqualified.

[0005] The industrial circulating water water-saving and emission-reducing device has at least the following beneficial effects: the mechanical seal water collecting branch pipe and the mechanical seal water collecting main pipe cooperate to collect the cooling water generated by the mechanical seal of each pump into the circulating water collecting groove, the switching valve group is connected with the ground discharge pipe, when the PH detection device detects that the water quality of the cooling water is unqualified, the switching valve group acts, and the cooling water in the mechanical seal water collecting main pipe is no longer input into the circulating water collecting groove, so that the cooling water in the circulating water collecting groove is prevented from being polluted, and the switching valve group can discharge the cooling water in the mechanical seal water collecting main pipe into the ground discharge pipe when the pH value of the cooling water is unqualified.

[0006] According to some embodiments of the utility model, the switching valve group includes a circulating valve and a ground discharge valve, the mechanical seal water collecting main pipe is communicated with the circulating water collecting groove through the circulating valve, and the mechanical seal water collecting main pipe is communicated with the ground discharge pipe through the ground discharge valve; when the pH value of the cooling water is qualified, the circulating valve is opened, and the ground discharge valve is closed; when the pH value of the cooling water is unqualified, the circulating valve is closed, and the ground discharge valve is opened.

[0007] According to some embodiments of the utility model, the circulating water collecting groove is connected with a water pump, the water pump is used to convey the cooling water in the circulating water collecting groove to a heat exchanger, the heat exchanger utilizes external cold water to cool the cooling water flowing through the heat exchanger, the heat exchanger is connected with the pump equipment group, and the cooling water flows through the heat exchanger and then enters the pump equipment group to cool the mechanical seal.

[0008] According to some embodiments of the utility model, the water pump is provided with two.

[0009] According to some embodiments of the utility model, the water pump is connected with the heat exchanger through an outlet pipe, the outlet pipe is connected with a drain pipe, and a drain valve is arranged on the drain pipe.

[0010] According to some embodiments of the utility model, the outlet pipe is connected with a bypass pipe, the bypass pipe is connected with the circulating water collecting groove, and an adjusting valve is arranged on the bypass pipe.

[0011] According to some embodiments of the utility model, a filter is arranged on the bypass pipe.

[0012] According to some embodiments of the utility model, a dosing pipe is arranged on the top of the circulating water collecting groove.

[0013] According to some embodiments of the utility model, the circulating water collecting groove is provided with a water supplement valve, when the water level in the circulating water collecting groove is lower than a preset value, the water supplement valve is opened to input tap water into the circulating water collecting groove.

[0014] According to some embodiments of the utility model, the PH detection device is provided with an audible and visual alarm.

[0015] The additional aspects and advantages of the utility model will be partly given in the following description, partly will become obvious from the following description, or be known by the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0016] The utility model will be further explained in combination with the drawings and embodiments, wherein:

[0017] Figure 1 It is the whole schematic view of one embodiment of the utility model.

[0018] Reference numerals:

[0019] The machine seal water collecting sub-pipe 100;

[0020] The pump equipment group 200;

[0021] The circulating water collecting groove 300, water pump 310, outlet pipe 311, drain pipe 312, drain valve 313, heat exchanger 320, dosing pipe 330, water supplement valve 340;

[0022] The machine seal water collecting main pipe 400;

[0023] The PH detection device 500;

[0024] Switch valve group 600, circulating valve 610, drain valve 620;

[0025] Drain pipe 700;

[0026] Bypass pipe 800, regulating valve 810, filter 820. DETAILED DESCRIPTION

[0027] The embodiments of the utility model will be described in detail below, the examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and can not be understood as the limitation of the utility model.

[0028] In the description of the utility model, it is understood that, if the direction description, for example, the direction or position relation of the indication such as upper, lower is based on the direction or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicating or implying that the device or element must have a particular orientation, a particular orientation and operation, therefore, it can not be understood as the limitation of the utility model.

[0029] In the description of the utility model, more refers to two or more. If there is a description to the first, the second is only used for distinguishing the purpose of technical features, and can not be understood as indicating or implying the relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0030] In the description of the utility model, unless otherwise specified, the words such as setting, installation, connection should be understood in a broad sense, and the person skilled in the art can reasonably determine the specific meaning of the above words in the utility model according to the specific content of the technical scheme.

[0031] Refer to Figure 1The utility model discloses a kind of water-saving and emission reduction devices of industrial circulating water, including: multiple machine seal water collection branch pipe 100, circulating water collection tank 300, machine seal water collection main pipe 400, PH detection device 500, switching valve group 600.Machine seal water collection branch pipe 100 is connected with pump equipment group 200, and pump equipment group 200 includes multiple pumps, and each machine seal water collection branch pipe 100 is connected with the mechanical seal of corresponding pump.Machine seal water collection branch pipe 100 is used to collect the cooling water of the mechanical seal of pump equipment group 200, and mechanical seal generates heat when pump is running, so cooling water is used to cool mechanical seal.If cooling water is directly discharged, it can cause cooling water waste and increase system wastewater treatment load problem.So use machine seal water collection branch pipe 100 to collect cooling water.Circulating water collection tank 300 is used to store cooling water, and circulating water collection tank 300 provides a buffer and temporary storage space for collected cooling water.Machine seal water collection main pipe 400 is communicated with circulating water collection tank 300, and machine seal water collection branch pipe 100 is communicated with circulating water collection tank 300 by machine seal water collection main pipe 400;Machine seal water collection branch pipe 100 and machine seal water collection main pipe 400 cooperate, and the cooling water generated by the mechanical seal of each pump is collected into circulating water collection tank 300, and PH detection device 500 is arranged in machine seal water collection main pipe 400, and PH detection device 500 is used to measure the pH value in machine seal water collection main pipe 400;PH detection device 500 is prior art, and its installation mode and specific structure are not described in detail.When mechanical seal is damaged, acidic or alkaline waste liquid can enter cooling water, causing cooling water pollution.Switching valve group 600 is arranged in machine seal water collection main pipe 400, and switching valve group 600 is connected with drain pipe 700, and when PH detection device 500 detects that the quality of cooling water is unqualified, switching valve group 600 acts, and cooling water in machine seal water collection main pipe 400 is not input into circulating water collection tank 300, to prevent cooling water in circulating water collection tank 300 from being contaminated, and switching valve group 600 can discharge cooling water in machine seal water collection main pipe 400 into drain pipe 700 when the pH value of cooling water is unqualified.While recycling cooling water to reduce operating cost, through PH detection device 500, water quality change condition of circulating cooling water in pump equipment machine seal can be observed and monitored at any time, when pH value suddenly reduces and is less than set value, audible and visual alarm starts to alarm, prompt circulating cooling water quality has not met machine seal cooling water supply requirement, and switching valve group 600 interlocking switching cooling water flow direction is handled.

[0032] Reference Figure 1As shown, it can be understood that the switching valve group 600 includes a circulating valve 610 and a drain valve 620, both of which are selected from electric valves, and the circulating valve 610, the drain valve 620 and the PH detection device 500 are all connected with the PLC control system. When the PH detection device 500 detects that the pH value of the cooling water exceeds the preset value, the PLC control system controls the interlocking action of the circulating valve 610 and the drain valve 620. The machine seal water collection main pipe 400 is communicated with the circulating water collection tank 300 through the circulating valve 610, and the circulating valve 610 controls whether the water in the machine seal water collection main pipe flows to the circulating water collection tank 300 for recycling. The machine seal water collection main pipe 400 is communicated with the drain pipe 700 through the drain valve 620, and the control mode of the PLC control system is that when the pH value of the cooling water is qualified, the circulating valve 610 is opened and the drain valve 620 is closed, and when the pH value of the cooling water is unqualified, the circulating valve 610 is closed and the drain valve 620 is opened.

[0033] Referring to Figure 1 As shown, it can be understood that the circulating water collection tank 300 is connected with a water pump 310. Since the water in the circulating water collection tank 300 is too high in temperature to be directly utilized, the water pump 310 is arranged to transport the cooling water in the circulating water collection tank 300 to a heat exchanger 320. The heat exchanger 320 utilizes external cold water to cool the cooling water flowing through the heat exchanger 320. The heat exchanger 320 is connected with the pump equipment group 200, and the cooling water flowing through the heat exchanger 320 enters the pump equipment group 200 to cool the mechanical seal.

[0034] Referring to Figure 1 As shown, it can be understood that two water pumps 310 are arranged, and the two water pumps 310 are standby for each other. When one water pump 310 fails or needs to be maintained, the standby pump can be started immediately to ensure the continuous operation of the system and avoid the risk of shutdown. The two water pumps 310 can be used alternately to balance the wear and reduce the mechanical fatigue of long-term operation of a single pump. It can be predicted that a one-way valve is arranged at the outlet of the water pump 310 to prevent the cooling water from flowing back into the water pump 310 from the outlet of the water pump 310 when the water pump 310 stops running.

[0035] Referring to Figure 1As shown, it can be understood that the water pump 310 is connected with the heat exchanger 320 through the outlet pipe 311, the outlet pipe 311 is connected with the drain pipe 312, and the drain valve 313 is arranged on the drain pipe 312. The drain pipe 312 arranged on the outlet pipe 311 connected with the water pump 310 is convenient for draining the cooling water. The circulating cooling water must drain a certain amount of concentrated water and supplement a certain amount of new water in operation. The salt content, pH value, organic matter concentration and suspended matter content in the cooling water are controlled in a reasonable allowable range, so it is necessary to drain the cooling water when the water quality exceeds the standard and supplement the tap water. The drain pipe 312 is used for draining the cooling water to the ground for treatment. The drain valve 313 is selected to be a valve that can be electrically adjusted to control the flow of the drained cooling water.

[0036] Referring to Figure 1 As shown, it can be understood that the outlet pipe 311 is connected with the bypass pipe 800, the bypass pipe 800 is connected with the circulating water collecting tank 300, and the regulating valve 810 is arranged on the bypass pipe 800. Since the pumps in the pump equipment group 200 do not need to operate at the same time, the flow of the cooling water required by the pump equipment group 200 is variable. By changing the opening degree of the regulating valve 810 on the bypass pipe 800, a part of the cooling water output by the water pump 310 is returned to the circulating water collecting tank 300, so as to change the flow of the cooling water output to the pump equipment group 200.

[0037] Referring to Figure 1 As shown, it can be understood that the filter 820 is arranged on the bypass pipe 800. In the process of circulating use of the cooling water, mechanical seals and pumps can be worn to produce fine particles or suspended matter. In order to treat this part of impurities, the filter 820 is arranged on the bypass pipe 800 to filter out the solid impurities of the cooling water and improve the water quality of the cooling water. The advantage of arranging the filter 820 on the bypass pipe 800 is that after the filter 820 is blocked after long-term use, the flow of the cooling water output to the heat exchanger 320 will not be reduced. However, if the filter 820 is directly arranged at the outlet of the water pump 310, the filter 820 will be blocked after long-term use, which will cause the flow of the cooling water to be insufficient.

[0038] Referring to Figure 1 As shown, it can be understood that the dosing pipe 330 is arranged at the top of the circulating water collecting tank 300. The dosing pipe 330 is used for adding softening agent or scale inhibitor into the circulating water collecting tank 300 to reduce the scaling caused by long-term circulation of the cooling water. The service life of the mechanical seal is prolonged.

[0039] Referring to Figure 1As shown, it can be understood that the circulating water collecting tank 300 is provided with a water replenishing valve 340, the water replenishing valve 340 is connected with a tap water pipe, the tap water pipe replenishes tap water into the circulating water collecting tank 300 through the water replenishing valve 340, the water replenishing valve 340 is selected as a float ball valve, when the water level in the circulating water collecting tank 300 is lower than a preset value, the water replenishing valve 340 is opened to input tap water into the circulating water collecting tank 300. Because of inevitable leakage or pollution of cooling water in use, the water level in the circulating water collecting tank 300 will continuously decrease, so when the water level in the circulating water collecting tank 300 decreases to the preset value, the water replenishing valve 340 is automatically opened, the tap water pipe replenishes tap water into the circulating water collecting tank 300 through the water replenishing valve 340, and the water level in the circulating water collecting tank 300 is maintained.

[0040] It can be understood that the circulating water collecting tank 300 is connected with a sampling pipe, so that the cooling water can be sampled and detected.

[0041] Referring to Figure 1 As shown, it can be understood that the PH detection device 500 is provided with an audible and visual alarm. When the pH value exceeds a preset safety range, the audible and visual alarm is triggered immediately, the hysteresis of manual inspection is reduced, the risk of missing detection caused by personnel fatigue or negligence is reduced, and the monitoring reliability is improved. It is especially suitable for processes that need to be intervened quickly.

[0042] Working principle: the mechanical seal water collecting branch pipe 100 and the mechanical seal water collecting main pipe 400 cooperate, and the cooling water generated by the mechanical seal of each pump is collected into the circulating water collecting tank 300, the cooling water is recycled and utilized to reduce operation cost, the PH detection device 500 is used to observe and monitor the water quality change of the circulating cooling water in the mechanical seal of the pump equipment, when the pH value suddenly decreases and is less than a set value, the audible and visual alarm starts to alarm, the quality of the circulating cooling water does not meet the requirement of the mechanical seal cooling water supply, and the control mode of the PLC control system is that: when the pH value of the cooling water is qualified, the circulating valve 610 is opened, and the ground valve 620 is closed; when the pH value of the cooling water is unqualified, the circulating valve 610 is closed, and the ground valve 620 is opened.

[0043] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range of ordinary skilled in the art without departing from the purpose of the utility model.

Claims

1. An industrial circulating water water-saving and emission-reducing device, characterized in that, The application relates to a circulating water collecting system for a pump device group, which comprises the following parts: a plurality of mechanical seal water collecting branch pipes (100) connected with a pump device group (200), wherein the mechanical seal water collecting branch pipes (100) are used for collecting cooling water of mechanical seals of the pump device group (200); a circulating water collecting tank (300) used for storing cooling water; a mechanical seal water collecting main pipe (400) connected with the circulating water collecting tank (300), wherein the mechanical seal water collecting branch pipes (100) are connected with the circulating water collecting tank (300) through the mechanical seal water collecting main pipe (400); a PH detection device (500) arranged in the mechanical seal water collecting main pipe (400), wherein the PH detection device (500) is used for measuring the pH value in the mechanical seal water collecting main pipe (400); and a switching valve group (600) arranged in the mechanical seal water collecting main pipe (400), wherein the switching valve group (600) is connected with a ground discharge pipe (700), and the switching valve group (600) can discharge the cooling water in the mechanical seal water collecting main pipe (400) into the ground discharge pipe (700) when the pH value of the cooling water is unqualified. The switching valve group (600) comprises a circulating valve (610) and a ground discharge valve (620), the mechanical seal water collecting main pipe (400) is connected with the circulating water collecting tank (300) through the circulating valve (610), the mechanical seal water collecting main pipe (400) is connected with the ground discharge pipe (700) through the ground discharge valve (620), the circulating valve (610) is opened and the ground discharge valve (620) is closed when the pH value of the cooling water is qualified, and the circulating valve (610) is closed and the ground discharge valve (620) is opened when the pH value of the cooling water is unqualified. The circulating water collecting tank (300) is connected with a water pump (310), the water pump (310) is used for conveying the cooling water in the circulating water collecting tank (300) to a heat exchanger (320), the heat exchanger (320) is used for cooling the cooling water flowing through the heat exchanger (320) by using external cold water, the heat exchanger (320) is connected with the pump device group (200), and the cooling water flows through the heat exchanger (320) and then enters the pump device group (200) to cool the mechanical seals. The water pump (310) is provided with two. The water pump (310) is connected with the heat exchanger (320) through an outlet pipe (311), the outlet pipe (311) is connected with a drain pipe (312), and a drain valve (313) is arranged on the drain pipe (312). The outlet pipe (311) is connected with a bypass pipe (800), the bypass pipe (800) is connected with the circulating water collecting tank (300), and an adjusting valve (810) is arranged on the bypass pipe (800).

2. The water saving and emission reducing device for industrial circulating water according to claim 1, characterized in that: A filter (820) is arranged on the bypass pipe (800).

3. The water saving and emission reducing device for industrial circulating water according to claim 1, characterized in that: A dosing pipe (330) is arranged on the top of the circulating water collecting tank (300).

4. The water saving and emission reducing device for industrial circulating water according to claim 3, characterized in that: A water supplement valve (340) is arranged in the circulating water collecting tank (300), and the water supplement valve (340) is opened to input tap water into the circulating water collecting tank (300) when the water level in the circulating water collecting tank (300) is lower than a preset value.

5. The water saving and emission reducing device for industrial circulating water according to claim 3, characterized in that: ​ 6. The water saving and emission reducing device for industrial circulating water according to claim 5, characterized in that: ​ 7. The water saving and emission reducing device for industrial circulating water according to claim 6, characterized in that: ​ 8. The water saving and emission reducing device for industrial circulating water of claim 1, wherein: ​ 9. The water saving and emission reducing device for industrial circulating water of claim 1, wherein: ​ 10. The water saving and emission reducing device for industrial circulating water of claim 1, characterized in that: The PH detection device (500) is provided with an audible and visual alarm.

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