Sodium hypochlorite dosing device

Abstract

The utility model provides a sodium hypochlorite dosing device which comprises a medicine storage mechanism, a dosing mechanism and an exhaust mechanism, the medicine storage mechanism comprises a medicine storage tank, the bottom of the medicine storage tank is connected with a liquid outlet pipe, and the tail end of the liquid outlet pipe is connected with a liquid feeding pipe and a standby pipe; the dosing mechanism comprises dosing pipes respectively connected to the liquid delivery pipe and the standby pipe, a transverse pipe is connected between the two dosing pipes, a dosing pump is arranged at the lower part of each dosing pipe, the middle part of each dosing pipe is communicated with the middle part of a medicine outlet pipe through a communicating pipe, the lower end of each medicine outlet pipe is connected with the wastewater pool, and a pulse damper and a pressure gauge are arranged at the upper part of each medicine outlet pipe; the exhaust mechanism comprises a three-way connecting pipe, a reducing connecting pipe, an exhaust bottle and a bottle cap which are sequentially connected, and the side portion of the bottle cap is connected with an exhaust nozzle. The device can timely discharge gas generated by decomposition of sodium hypochlorite in the pipeline, effectively solves the problem of unstable sodium hypochlorite dosing caused by gas generation of the pipeline of the sodium hypochlorite dosing pump, and ensures continuous and effective disinfection of sewage treatment tail water.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a sodium hypochlorite dosing device. Background Art

[0002] Sodium hypochlorite is an inorganic compound that can be used to treat industrial wastewater and domestic sewage for bleaching and disinfection in the sewage treatment process of sewage treatment plants.

[0003] In the prior art, sodium hypochlorite is usually added to the sewage treatment pool using a sodium hypochlorite dosing system. During the dosing process, the gas produced by the decomposition of sodium hypochlorite exists in the pipeline, which causes the metering pump to be unable to effectively discharge the liquid during operation, resulting in the inability to continuously and effectively disinfect the sewage treatment tail water, and facing the risk of excessive E. coli in the sewage.

[0004] Therefore, it is necessary to discharge the gas generated by the decomposition of sodium hypochlorite in the pipeline. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide a sodium hypochlorite dosing device, which can timely discharge the gas generated by the decomposition of sodium hypochlorite in the pipeline and eliminate the adverse effects of the gas on the operation of sewage treatment equipment.

[0006] The utility model provides a sodium hypochlorite dosing device, comprising a drug storage mechanism, a drug adding mechanism and an exhaust mechanism, wherein:

[0007] The medicine storage mechanism comprises a medicine storage tank, the bottom of which is connected to a liquid outlet pipe, and the end of the liquid outlet pipe is connected to a liquid delivery pipe and a standby pipe;

[0008] The dosing mechanism comprises dosing tubes respectively connected to the liquid delivery tube and the standby tube, a horizontal tube is connected between the two dosing tubes, a dosing pump is arranged at the lower part of the dosing tube, the middle part of the dosing tube is connected to the middle part of the drug outlet tube through a connecting tube, the lower end of the drug outlet tube is connected to the wastewater tank, and a pulse damper and a pressure gauge are arranged at the upper part thereof;

[0009] The exhaust mechanism includes a three-way connecting pipe arranged on the liquid delivery pipe or the spare pipe, the three-way connecting pipe is connected to the reducing connecting pipe, the reducing connecting pipe is connected to the exhaust bottle, the upper end of the exhaust bottle is connected to the bottle cap, and the side of the bottle cap is connected to the exhaust nozzle.

[0010] Preferably, a one-way valve and a safety pressure relief valve are provided on the dosing pipe, the one-way valve is provided between the dosing pump outlet and the connecting pipe, and the safety pressure relief valve is provided between the connecting pipe and the cross pipe.

[0011] Preferably, a reflux pipe is connected between the transverse pipe and the liquid delivery pipe.

[0012] Preferably, the reflux pipe is connected to the medicine outlet pipe through the medicine discharge pipe.

[0013] Preferably, a pressure sensor is installed on the top of the bottle cap, and a solenoid valve is provided on the exhaust nozzle, and the pressure sensor and the solenoid valve are electrically connected to the controller respectively.

[0014] Preferably, a limit scale is provided on the exhaust bottle.

[0015] Preferably, it further comprises a mounting bracket, wherein the mounting bracket comprises a base, a set of inverted "L"-shaped mounting rails are provided on the base, and the medicine delivery pump is mounted on the mounting rails by bolts.

[0016] Working principle of the utility model: sodium hypochlorite is easy to decompose when exposed to light and heat, and the decomposition products include oxygen and sodium chloride, and the reaction formula is: 2NaClO=2NaCl+O2↑. The sodium hypochlorite dosing device of the utility model utilizes the working principle of a U-shaped device and a three-way connecting pipe for diversion. After the gas is generated from the sodium hypochlorite solution, it will flow with the sodium hypochlorite liquid. The gas is on the upper side of the pipeline. When the sodium hypochlorite liquid flows through the three-way connecting pipe, the gas will move to the upper part of the pipeline to achieve gas separation. Because the drug storage tank is much higher than the inlet of the dosing pump, the gas will gather at the upper part of the exhaust bottle, causing the visible liquid level to drop. When the liquid level drops to the lower limit scale, the valve is manually opened to discharge the gas, so that the liquid level returns to the outlet of the diaphragm metering pump. Furthermore, a pressure sensor can be set in the exhaust bottle to sense that the air pressure in the exhaust bottle reaches a certain value, and the solenoid valve is automatically started to exhaust.

[0017] Beneficial effects of the utility model: the sodium hypochlorite dosing device of the utility model is equipped with an exhaust device on the medicine inlet side of the dosing pump. The exhaust device controls the liquid level to be higher than the inlet of the dosing pump, so that the gas generated by the decomposition of sodium hypochlorite in the pipeline can be discharged in time, which effectively solves the problem of unstable sodium hypochlorite dosing caused by gas production in the pipeline of the sodium hypochlorite dosing pump, ensures the stability of sodium hypochlorite dosing, and ensures that the disinfection of sewage treatment tail water is continuously and effectively carried out. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is a schematic diagram of the structure of the sodium hypochlorite dosing device.

[0019] In the figure: a medicine storage mechanism 1, a medicine storage tank 11, a liquid outlet pipe 12, a liquid delivery pipe 13, and a spare pipe 14; a medicine adding mechanism 2, a medicine adding pipe 21, a cross pipe 22, a medicine adding pump 23, a connecting pipe 24, a medicine outlet pipe 25, a pulse damper 26, a one-way valve 28, a safety pressure relief valve 29, a reflux pipe 210, and a medicine discharge pipe 211; an exhaust mechanism 3, a three-way connecting pipe 31, a reducing connecting pipe 32, an exhaust bottle 33, a bottle cap 34, an exhaust nozzle 35, a pressure sensor 36, a solenoid valve 37, and a limit scale 38; a mounting bracket 4, a base 41, and a mounting track 42; and a wastewater tank 5. DETAILED DESCRIPTION

[0020] In order to make the technical solution of the present utility model easier to understand, the technical solution of the present utility model is now clearly and completely described in the form of specific embodiments in combination with the accompanying drawings.

[0021] Embodiment 1:

[0022] like Figure 1 As shown, the sodium hypochlorite dosing device of this embodiment includes a drug storage mechanism 1, a drug adding mechanism 2 and an exhaust mechanism 3, wherein:

[0023] The medicine storage mechanism 1 comprises a medicine storage tank 11, the bottom of the medicine storage tank 11 is connected to a liquid outlet pipe 12, and the end of the liquid outlet pipe 12 is connected to a liquid delivery pipe 13 and a standby pipe 14;

[0024] The dosing mechanism 2 includes dosing tubes 21 connected to the liquid delivery tube 13 and the standby tube 14 respectively, a transverse tube 22 is connected between the two dosing tubes 21, a dosing pump 23 is provided at the lower part of the dosing tube 21, the middle part of the dosing tube 21 is connected to the middle part of the drug outlet tube 25 through a connecting tube 24, the lower end of the drug outlet tube 25 is connected to the wastewater tank 5, and a pulse damper 26 and a pressure gauge 27 are provided at the upper part thereof;

[0025] The exhaust mechanism 3 includes a three-way connecting pipe 31 arranged on the liquid delivery pipe 13 or the spare pipe 14, the three-way connecting pipe 31 is connected to a reducing connecting pipe 32, the reducing connecting pipe 32 is connected to an exhaust bottle 33, the upper end of the exhaust bottle 33 is connected to a bottle cap 34, and the side of the bottle cap 34 is connected to an exhaust nozzle 35.

[0026] Embodiment 2:

[0027] like Figure 1 As shown, the sodium hypochlorite dosing device of this embodiment includes a drug storage mechanism 1, a drug adding mechanism 2 and an exhaust mechanism 3, wherein:

[0028] The medicine storage mechanism 1 comprises a medicine storage tank 11, the bottom of the medicine storage tank 11 is connected to a liquid outlet pipe 12, and the end of the liquid outlet pipe 12 is connected to a liquid delivery pipe 13 and a standby pipe 14;

[0029] The dosing mechanism 2 includes dosing tubes 21 connected to the liquid delivery tube 13 and the standby tube 14 respectively, a transverse tube 22 is connected between the two dosing tubes 21, a dosing pump 23 is provided at the lower part of the dosing tube 21, the middle part of the dosing tube 21 is connected to the middle part of the drug outlet tube 25 through a connecting tube 24, the lower end of the drug outlet tube 25 is connected to the wastewater tank 5, and a pulse damper 26 and a pressure gauge 27 are provided at the upper part thereof;

[0030] The exhaust mechanism 3 includes a three-way connecting pipe 31 arranged on the liquid delivery pipe 13 or the spare pipe 14, the three-way connecting pipe 31 is connected to a reducing connecting pipe 32, the reducing connecting pipe 32 is connected to an exhaust bottle 33, the upper end of the exhaust bottle 33 is connected to a bottle cap 34, and the side of the bottle cap 34 is connected to an exhaust nozzle 35.

[0031] The dosing pipe 21 is provided with a one-way valve 28 and a safety pressure relief valve 29 . The one-way valve 28 is provided between the outlet of the dosing pump 23 and the connecting pipe 24 , and the safety pressure relief valve 29 is provided between the connecting pipe 24 and the cross pipe 22 .

[0032] A reflux pipe 210 is connected between the transverse pipe 22 and the liquid delivery pipe 13 .

[0033] The reflux pipe 210 is connected to the medicine outlet pipe 25 through the medicine discharge pipe 211 .

[0034] A pressure sensor 36 is installed on the top of the bottle cap 34 , and a solenoid valve 37 is provided on the exhaust nozzle 35 . The pressure sensor 36 and the solenoid valve 37 are electrically connected to the controller respectively.

[0035] The exhaust bottle 33 is provided with a limit scale 38 .

[0036] It also includes a mounting bracket 4, which includes a base 41. The base 41 is provided with a set of inverted "L"-shaped mounting rails 42, and the medicine delivery pump is mounted on the mounting rails 42 by bolts.

[0037] It should be noted that the embodiments described herein are only partial embodiments of the present invention, rather than all implementations of the present invention, and the embodiments are only exemplary, and their role is only to provide a more intuitive and clear way to understand the content of the present invention, rather than to limit the technical solutions described in the present invention. Without departing from the concept of the present invention, all other implementation methods that ordinary technicians in the field can think of without creative work, and other simple replacements and various changes to the technical solutions of the present invention, all belong to the protection scope of the present invention.

Claims

1. A sodium hypochlorite dosing device, characterized in that: It comprises a medicine storage mechanism (1), a medicine adding mechanism (2) and an exhaust mechanism (3), wherein: The medicine storage mechanism (1) comprises a medicine storage tank (11), the bottom of the medicine storage tank (11) is connected to a liquid outlet pipe (12), and the end of the liquid outlet pipe (12) is connected to a liquid delivery pipe (13) and a standby pipe (14); The dosing mechanism (2) comprises dosing pipes (21) respectively connected to the liquid delivery pipe (13) and the standby pipe (14); a transverse pipe (22) is connected between the two dosing pipes (21); a dosing pump (23) is provided at the lower part of the dosing pipe (21); the middle part of the dosing pipe (21) is connected to the middle part of the drug outlet pipe (25) through a connecting pipe (24); the lower end of the drug outlet pipe (25) is connected to the wastewater tank (5); and a pulse damper (26) and a pressure gauge (27) are provided at the upper part; The exhaust mechanism (3) comprises a three-way connecting pipe (31) arranged on the liquid delivery pipe (13) or the standby pipe (14), the three-way connecting pipe (31) is connected to a reducing connecting pipe (32), the reducing connecting pipe (32) is connected to an exhaust bottle (33), the upper end of the exhaust bottle (33) is connected to a bottle cap (34), and the side of the bottle cap (34) is connected to an exhaust nozzle (35).

2. The sodium hypochlorite dosing device according to claim 1, characterized in that: The dosing pipe (21) is provided with a one-way valve (28) and a safety pressure relief valve (29). The one-way valve (28) is arranged between the outlet of the dosing pump (23) and the connecting pipe (24), and the safety pressure relief valve (29) is arranged between the connecting pipe (24) and the transverse pipe (22).

3. The sodium hypochlorite dosing device according to claim 1, characterized in that: A reflux pipe (210) is connected between the transverse pipe (22) and the liquid delivery pipe (13).

4. The sodium hypochlorite dosing device as claimed in claim 3, characterized in that: The reflux pipe (210) is connected to the medicine outlet pipe (25) via the medicine discharge pipe (211).

5. The sodium hypochlorite dosing device according to claim 1, characterized in that: A pressure sensor (36) is installed on the top of the bottle cap (34), and a solenoid valve (37) is provided on the exhaust nozzle (35). The pressure sensor (36) and the solenoid valve (37) are electrically connected to the controller respectively.

6. The sodium hypochlorite dosing device according to claim 1, characterized in that: The exhaust bottle (33) is provided with a limit scale (38).

7. The sodium hypochlorite dosing device according to claim 1, characterized in that: The invention also comprises a mounting bracket (4), wherein the mounting bracket (4) comprises a base (41), a group of inverted "L"-shaped mounting rails (42) are arranged on the base (41), and the medicine delivery pump is mounted on the mounting rails (42) by means of bolts.

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