Chromium-containing sewage treatment device for hospital laboratory

Abstract

The utility model discloses a chromium-containing sewage treatment device for a hospital test room, and particularly relates to the technical field of chromium-containing sewage treatment, which comprises an adjusting tank, an equipment room is arranged on one side of the adjusting tank, a reaction tank is arranged on the other side of the adjusting tank, and a coagulative precipitation tank is arranged on one side of the reaction tank. A PAC adding device, a PAM adding device, an automatic acid adding device, an automatic alkali adding device and a ferrous sulfate adding device are respectively arranged in the equipment room, and a pH display, an ORP display, an electromagnetic air pump and a PLC control system are also arranged in the equipment room. According to the utility model, a plurality of treatment units such as an adjusting unit, a reaction unit and a coagulating sedimentation unit are integrated, and the PLC control system is combined to realize accurate automatic control, so that chromium pollutants in sewage are effectively removed, the effluent quality is ensured to reach the standard, and meanwhile, the treatment efficiency and the stability are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of chromium-containing sewage treatment, more particularly to a hospital laboratory chromium-containing sewage treatment device. BACKGROUND

[0002] At present, a large amount of chromium-containing sewage is produced in daily work of hospital laboratories, which mainly comes from chemical reagents and sample treatment liquids used in experimental processes, and the chromium-containing sewage has characteristics of great toxicity and difficult degradation, and if not properly treated and directly discharged into the environment, it will cause serious pollution to water bodies, soil and even affect human health through the food chain.

[0003] At present, for the treatment of chromium-containing sewage in hospital laboratories, the traditional physical, chemical or biological treatment methods have certain limitations:

[0004] 1. Physical methods such as grating filtration and sedimentation can only remove large particles and suspended solids in sewage, and cannot effectively remove chromium ions dissolved in water;

[0005] 2. Chemical methods such as oxidation-reduction and precipitation can remove chromium ions, but a large amount of chemical reagents are consumed in the treatment process, and a large amount of sludge is generated, increasing the difficulty and cost of subsequent treatment;

[0006] 3. Biological treatment methods have problems of long treatment cycle and low efficiency.

[0007] In view of the above problems, the utility model provides a hospital laboratory chromium-containing sewage treatment device. UTILITY MODEL CONTENT

[0008] In order to overcome the above-mentioned defects of the prior art, the utility model provides a hospital laboratory chromium-containing sewage treatment device to solve the problems in the above background art.

[0009] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme: a hospital laboratory chromium-containing sewage treatment device, comprising a conditioning tank, a side of the conditioning tank is provided with an equipment room, and the other side of the conditioning tank is provided with a reaction tank, a side of the reaction tank is provided with a coagulation and sedimentation tank, the equipment room is respectively provided with a PAC dosing device, a PAM dosing device, an automatic acid dosing device, an automatic alkali dosing device and a ferrous sulfate dosing device, and a pH display, an ORP display, an electromagnetic air pump and a PLC control system are further installed in the interior of the equipment room.

[0010] The inside of the adjusting tank and the reaction tank is respectively provided with two liquid level controllers, the inside of the adjusting tank is further provided with two adjusting tank lifting pumps, the top of the adjusting tank is communicated with a water inlet pipe, the inside of the reaction tank is provided with two reaction tank lifting pumps, and the inside of the reaction tank is provided with an aeration stirring system, and the inside of the reaction tank is further provided with a pH sensor and an ORP sensor from left to right.

[0011] The outer wall of the coagulation sedimentation tank is communicated with a water outlet pipe.

[0012] Preferably, the adjusting tank is used for adjusting the water quantity, the device is used for installing related process equipment of a pH display, an electromagnetic air pump, a PLC control system, an automatic acid adding device, an automatic alkali adding device, a PAC adding device, a PAM adding device and a ferrous sulfate adding device, the reaction tank is used for reacting the chromium-containing wastewater with a reducing agent to generate a precipitate, and the coagulation sedimentation tank is used for accelerating the precipitation of the precipitate after reaction by adding PAC and PAM.

[0013] Preferably, the PAC adding device is used for storing and stirring the PAC medicament, and adding the PAC into the coagulation sedimentation tank according to the instruction of the PLC control system.

[0014] The PAM adding device is used for storing and stirring the PAM medicament, and adding the PAM into the coagulation sedimentation tank according to the instruction of the PLC control system.

[0015] The automatic acid adding device is used for storing and stirring the acid medicament, and adding the acid into the reaction tank according to the instruction of the PLC control system.

[0016] The automatic alkali adding device is used for storing and stirring the alkali medicament, and adding the alkali into the reaction tank according to the instruction of the PLC control system.

[0017] The ferrous sulfate adding device is used for storing and stirring the ferrous sulfate, and adding the ferrous sulfate into the reaction tank according to the instruction of the PLC control system.

[0018] The pH display is used for displaying the pH value detected by the pH sensor.

[0019] The ORP display is used for displaying the ORP value detected by the ORP sensor.

[0020] The electromagnetic air pump is used for providing gas for the automatic acid adding device, the automatic alkali adding device, the PAC adding device, the PAM adding device, the ferrous sulfate adding device and the stirring device in the reaction tank.

[0021] The PLC control system is used for controlling the start and stop of each device.

[0022] Preferably, the liquid level controller is used to provide high and low signals of liquid level in the adjusting tank and the reaction tank;

[0023] The adjusting tank lifting pump is used to lift the sewage in the adjusting tank to the reaction tank;

[0024] The water inlet pipe is used to collect the sewage containing chromium into the adjusting tank;

[0025] The reaction tank lifting pump is used to lift the sewage in the reaction tank to the coagulation and sedimentation tank;

[0026] The aeration and stirring system is used to stir the reagents in the automatic acid adding device, the automatic alkali adding device, the PAC adding device, the PAM adding device and the ferrous sulfate adding device, and to stir the sewage in the reaction tank.

[0027] Preferably, the pH sensor is used to measure the pH in the reaction tank in real time;

[0028] The ORP sensor is used to measure the ORP in the reaction tank in real time;

[0029] The water outlet pipe can be used to discharge the treated sewage.

[0030] Preferably, the aeration and stirring system comprises an aeration device connected with an electromagnetic air pump, and the aeration device is arranged in the automatic acid adding device, the automatic alkali adding device, the PAC adding device, the PAM adding device, the ferrous sulfate adding device and the reaction tank.

[0031] Preferably, the pH sensor and the ORP sensor are signal connected with a PLC control system, and the PLC control system controls the reagent adding amount of the automatic acid adding device, the automatic alkali adding device and the ferrous sulfate adding device according to the values detected by the pH sensor and the ORP sensor.

[0032] The technical effects and advantages of the utility model are as follows:

[0033] 1. The automatic control of the sewage treatment process is realized through the PLC control system, and according to the data measured by the pH sensor and the ORP sensor in real time, the PLC control system can accurately control the reagent adding amount of the automatic acid adding device, the automatic alkali adding device, the ferrous sulfate adding device, the PAC adding device and the PAM adding device, which not only ensures the efficiency of the sewage treatment, but also improves the stability and reliability of the treatment process, and at the same time, the automatic treatment also reduces the errors and interventions of manual operation and reduces the operation cost;

[0034] 2、By setting the adjusting pool, reaction pool and coagulation sedimentation tank, and through the aeration stirring system, the medicament and sewage are fully mixed and reacted, the hexavalent chromium ions in the sewage can be effectively reduced into trivalent chromium ions, and the precipitate is formed with OH- ions, so that the chromium pollutants in the sewage are removed, at the same time, the addition of PAC and PAM further accelerates the coagulation and precipitation of the precipitate, improves the treatment effect, finally, the treated sewage is discharged through the outlet pipe, ensures that the outlet water quality meets the relevant environmental protection standards, and protects the environment and human health.

[0035] In summary, the application has the beneficial effects of efficient automatic processing and strong comprehensive processing capability, and provides a reliable solution for sewage treatment in hospital laboratories and the like. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is a plan view of the utility model.

[0037] Figure 2 It is a side view of the utility model.

[0038] The reference signs are: 1, adjusting pool; 2, equipment room; 3, reaction pool; 4, coagulation sedimentation tank; 5, PAC adding device; 6, PAM adding device; 7, automatic acid adding device; 8, automatic alkali adding device; 9, ferrous sulfate adding device; 10, pH display; 11, ORP display; 12, electromagnetic air pump; 13, PLC control system; 14, liquid level controller; 15, adjusting pool lifting pump; 16, inlet pipe; 17, reaction pool lifting pump; 18, aeration stirring system; 19, PH sensor; 20, ORP sensor; 21, outlet pipe. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0040] As shown in the accompanying drawings, Figures 1-2 The utility model provides a hospital laboratory chromium-containing sewage treatment device, specifically includes adjusting pool 1, the side of adjusting pool 1 is provided with equipment room 2, and the other side of adjusting pool 1 is provided with reaction pool 3, and the side of reaction pool 3 is provided with coagulation sedimentation tank 4.

[0041] Specifically, the adjusting pool 1 is used for adjusting the water quantity of incoming water.

[0042] The equipment room 2 is used to install the PH display 10, the electromagnetic air pump 12, the PLC control system 13, the automatic acid adding device 7, the automatic alkali adding device 8, the PAC adding device 5, the PAM adding device 6, and the ferrous sulfate adding device 9.

[0043] The reaction tank 3 is used to make the chromium-containing wastewater react with the reducing agent to generate a precipitate.

[0044] The coagulation sedimentation tank 4 is used to accelerate the precipitation of the precipitate after the reaction by adding PAC and PAM.

[0045] Specifically, as shown in the accompanying drawings, Figure 1 , 2 The equipment room 2 is respectively provided with the PAC adding device 5, the PAM adding device 6, the automatic acid adding device 7, the automatic alkali adding device 8, and the ferrous sulfate adding device 9, and the PH display 10, the ORP display 11, the electromagnetic air pump 12, and the PLC control system 13 are also installed inside the equipment room 2.

[0046] In the above equipment, the PAC adding device 5 is used to store and stir the PAC medicament, and add the PAC into the coagulation sedimentation tank 4 according to the instruction of the PLC control system 13.

[0047] The PAM adding device 6 is used to store and stir the PAM medicament, and add the PAM into the coagulation sedimentation tank 4 according to the instruction of the PLC control system 13.

[0048] The automatic acid adding device 7 is used to store and stir the acidic medicament, and add the acid into the reaction tank 3 according to the instruction of the PLC control system.

[0049] The automatic alkali adding device 8 is used to store and stir the alkaline medicament, and add the alkali into the reaction tank 3 according to the instruction of the PLC control system.

[0050] The ferrous sulfate adding device 9 is used to store and stir the ferrous sulfate, and add the ferrous sulfate into the reaction tank 3 according to the instruction of the PLC control system.

[0051] The PH display 10 is used to display the pH value detected by the PH sensor 19, the PLC control system is used to control the start and stop of each equipment, the PH sensor 19 and the ORP sensor 20 are signal connected with the PLC control system 13, and the PLC control system 13 also controls the medicament adding amount of the automatic acid adding device 7, the automatic alkali adding device 8, and the ferrous sulfate adding device 9 according to the values detected by the PH sensor 19 and the ORP sensor 20.

[0052] The ORP display 11 is used to display the ORP value detected by the ORP sensor 20.

[0053] The electromagnetic air pump 12 is used for providing gas for the automatic acid adding device 7, the automatic alkali adding device 8, the PAC adding device 5, the PAM adding device 6, the ferrous sulfate adding device 9 and the stirring device in the reaction tank 3.

[0054] Specifically, as shown in the accompanying drawings, Figure 1 、 2 Two liquid level controllers 14 are installed in the inside of the adjusting tank 1 and the reaction tank 3 respectively, two adjusting tank lifting pumps 15 are installed in the inside of the adjusting tank 1, a water inlet pipe 16 is communicated with the top of the adjusting tank 1, two reaction tank lifting pumps 17 are installed in the inside of the reaction tank 3, and an aeration stirring system 18 is installed in the inside of the reaction tank 3, and a PH sensor 19 and an ORP sensor 20 are sequentially installed in the inside of the reaction tank 3 from left to right.

[0055] The outer wall of the coagulation sedimentation tank 4 is communicated with a water outlet pipe 21.

[0056] In the above device, the liquid level controller 14 is used for providing high and low signals of the liquid level in the adjusting tank 1 and the reaction tank 3.

[0057] The adjusting tank lifting pump 15 is used for lifting the sewage in the adjusting tank 1 to the reaction tank 3.

[0058] The water inlet pipe 16 is used for collecting the sewage containing chromium into the adjusting tank 1.

[0059] The reaction tank lifting pump 17 is used for lifting the sewage in the reaction tank 3 to the coagulation sedimentation tank 4.

[0060] The aeration stirring system 18 is used for stirring the reagents in the automatic acid adding device 7, the automatic alkali adding device 8, the PAC adding device, the PAM adding device, the ferrous sulfate adding device 9 and the sewage in the reaction tank 3, and the aeration stirring system 18 comprises an aeration device connected with the electromagnetic air pump 12, and the aeration device is arranged in the automatic acid adding device 7, the automatic alkali adding device 8, the PAC adding device, the PAM adding device, the ferrous sulfate adding device 9 and the reaction tank 3.

[0061] The PH sensor 19 is used for measuring the pH in the reaction tank 3 in real time.

[0062] The ORP sensor 20 is used for measuring the ORP in the reaction tank 3 in real time.

[0063] The water outlet pipe 21 can be used for discharging the treated sewage.

[0064] The working principle of the utility model is as follows:

[0065] The application provides a hospital laboratory chromium-containing sewage treatment device, and specifically,

[0066] The sewage containing chromium is firstly introduced into the adjusting tank 1 through the inlet pipe 16, the liquid level controller 14 in the adjusting tank 1 monitors the liquid level, when reaching a certain height, the sewage is lifted to the reaction tank 3 by the adjusting tank lifting pump 15;

[0067] The aeration stirring system 18 is arranged in the reaction tank 3, meanwhile, the electromagnetic air pump 12 provides gas for each dosing device and the stirring in the reaction tank 3, the PH sensor 19 and the ORP sensor 20 in the reaction tank 3 measure the related parameters in real time, the PLC control system 13 controls the automatic acid dosing device 7, the automatic alkali dosing device 8 and the ferrous sulfate dosing device 9 to add reagents into the reaction tank 3 according to the parameters, so that the hexavalent chromium ions in the sewage are reduced into trivalent chromium ions and form precipitates with OH-ions;

[0068] Then, the sewage is lifted to the coagulation sedimentation tank 4 by the reaction tank lifting pump 17, the PAC dosing device 5 and the PAM dosing device 6 add reagents into the coagulation sedimentation tank 4 under the instruction of the PLC control system 13, so as to accelerate the coagulation and precipitation of the precipitates, finally, the supernatant after treatment is discharged through the outlet pipe 21.

[0069] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A hospital laboratory chromium-containing sewage treatment device, comprising a conditioning tank (1), one side of the conditioning tank (1) is provided with an equipment room (2), and the other side of the conditioning tank (1) is provided with a reaction tank (3), one side of the reaction tank (3) is provided with a coagulation sedimentation tank (4), characterized in that: The equipment room (2) is respectively provided with a PAC adding device (5), a PAM adding device (6), an automatic acid adding device (7), an automatic alkali adding device (8) and a ferrous sulfate adding device (9), and the inside of the equipment room (2) is further provided with a PH display (10), an ORP display (11), an electromagnetic air pump (12) and a PLC control system (13); The inside of the adjusting tank (1) and the reaction tank (3) is provided with two liquid level controllers (14), the inside of the adjusting tank (1) is further provided with two adjusting tank lifting pumps (15), the top of the adjusting tank (1) is communicated with a water inlet pipe (16), the inside of the reaction tank (3) is provided with two reaction tank lifting pumps (17), and the inside of the reaction tank (3) is provided with an aeration stirring system (18), and the inside of the reaction tank (3) is further provided with a PH sensor (19) and an ORP sensor (20) from left to right. The outer wall of the coagulation sedimentation tank (4) is communicated with a water outlet pipe (21).

2. The hospital laboratory chromium containing wastewater treatment apparatus as claimed in claim 1, wherein: The adjusting tank (1) is used for adjusting the water quantity, the equipment room (2) is used for installing the related process equipment of the PH display (10), the electromagnetic air pump (12), the PLC control system (13), the automatic acid adding device (7), the automatic alkali adding device (8), the PAC adding device (5), the PAM adding device (6) and the ferrous sulfate adding device (9), the reaction tank (3) is used for making the chromium-containing wastewater react with a reducing agent to generate a precipitate, and the coagulation sedimentation tank (4) is used for accelerating the precipitation of the precipitate after reaction by adding PAC and PAM.

3. The hospital laboratory chromium containing wastewater treatment apparatus as claimed in claim 1, wherein: The PAC adding device (5) is used for storing and stirring PAC medicament and adding PAC into the coagulation sedimentation tank (4) according to the instruction of the PLC control system (13). The PAM adding device (6) is used for storing and stirring PAM medicament and adding PAM into the coagulation sedimentation tank (4) according to the instruction of the PLC control system (13). The automatic acid adding device (7) is used for storing and stirring acid medicament and adding acid into the reaction tank (3) according to the instruction of the PLC control system. The automatic alkali adding device (8) is used for storing and stirring alkali medicament and adding alkali into the reaction tank (3) according to the instruction of the PLC control system. The ferrous sulfate adding device (9) is used for storing and stirring ferrous sulfate and adding ferrous sulfate into the reaction tank (3) according to the instruction of the PLC control system. The PH display (10) is used for displaying the pH value detected by the PH sensor (19). The ORP display (11) is used for displaying the ORP value detected by the ORP sensor (20). The electromagnetic air pump (12) is used for providing gas for the automatic acid adding device (7), the automatic alkali adding device (8), the PAC adding device (5), the PAM adding device (6), the ferrous sulfate adding device (9) and the stirring device in the reaction tank (3). The PLC control system is used for controlling the start and stop of each device.

4. The hospital laboratory chromium containing wastewater treatment apparatus as claimed in claim 1, wherein: The liquid level controller (14) is used to provide high and low signals of the liquid level in the adjusting tank (1) and the reaction tank (3); The adjusting tank lifting pump (15) is used to lift the sewage in the adjusting tank (1) to the reaction tank (3); The water inlet pipe (16) is used to collect the sewage containing chromium into the adjusting tank (1); The reaction tank lifting pump (17) is used to lift the sewage in the reaction tank (3) to the coagulation and sedimentation tank (4); The aeration and stirring system (18) is used to stir the reagents in the automatic acid adding device (7), the automatic alkali adding device (8), the PAC adding device, the PAM adding device, and the ferrous sulfate adding device (9), and to stir the sewage in the reaction tank (3).

5. The hospital laboratory chromium containing wastewater treatment apparatus as claimed in claim 1, wherein: The PH sensor (19) is used to measure the pH in the reaction tank (3) in real time; The ORP sensor (20) is used to measure the ORP in the reaction tank (3) in real time; The water outlet pipe (21) can be used to discharge the treated sewage.

6. The hospital laboratory chromium containing wastewater treatment apparatus as claimed in claim 1, wherein: The aeration and stirring system (18) includes an aeration device connected with the electromagnetic air pump (12), which is arranged in the automatic acid adding device (7), the automatic alkali adding device (8), the PAC adding device, the PAM adding device, the ferrous sulfate adding device (9), and the reaction tank (3).

7. A chromium containing wastewater treatment device for hospital laboratories as claimed in claim 1, wherein: The PH sensor (19) and the ORP sensor (20) are signal connected with the PLC control system (13), and the PLC control system (13) controls the reagent adding amount of the automatic acid adding device (7), the automatic alkali adding device (8), and the ferrous sulfate adding device (9) according to the values detected by the PH sensor (19) and the ORP sensor (20).

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