Supernatant storage tank with acid concentration adjusting function

Abstract

The utility model discloses a supernate storage tank with acid concentration adjusting function, which comprises a tank body, an exhaust tee joint, an acid adding four-way joint, an acid adding pipe and an acid adding sleeve, a breathing port, an exhaust port and an acid inlet are arranged at the top of the tank body, an acid outlet is arranged on the lateral side of the lower portion of the tank body, the breathing port is communicated with the atmosphere, the exhaust port is connected with the exhaust tee joint, and the acid adding four-way joint is connected with the acid adding pipe. The acid inlet is connected with an acid adding sleeve and an acid adding four-way joint, the acid adding four-way joint is provided with a tank body joint, a dilute acid inlet, an acid adding pipe joint and an air outlet, the tank body joint is connected with the acid inlet in the top of the tank body, the dilute acid inlet is used for being connected with an external dilute acid inlet pipe, the acid adding pipe joint is communicated with an acid adding pipe, and the air outlet is communicated with an exhaust tee joint; and three interfaces of the exhaust tee joint are respectively communicated with the exhaust port, the air outlet and an external negative pressure pipe interface. When the concentration of the purified circulating acid is too low and the concentration of the discharged waste acid is difficult to meet the requirement of a waste acid process, the concentrated sulfuric acid can be supplemented into the purified circulating acid through the device, so that the sulfuric acid concentration of the purified circulating acid and the discharged waste acid is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas acid-making equipment, in particular to a supernatant storage tank with an acid concentration adjustment function. Background Technique

[0002] At present, in the dilute acid purification and washing process of smelting flue gas acid-making, dilute acid is used to circulate and wash the smelting flue gas. According to the content of various impurity components in the smelting flue gas to be washed, the waste acid formed in the dilute acid washing process contains impurities of various components including As. Among them, As in the waste acid needs to be removed by the sulfide method in the waste acid process.

[0003] During the arsenic removal by the sulfide method, there are certain requirements for the sulfuric acid concentration in the waste acid. When the sulfuric acid concentration is too low, the reaction between the sulfiding agent and As will not be complete, affecting the arsenic removal effect of the waste acid process.

[0004] However, the sulfuric acid in the purified and discharged waste acid mainly comes from SO3 in the smelting flue gas. When the content of SO3 in the smelting flue gas is low, it often causes the acid concentration of the purified and discharged waste acid to be too low, making it difficult to meet the acid concentration requirements of the waste acid treatment process. Content of the Utility Model

[0005] To solve the above technical problems, the utility model designs a supernatant storage tank with an acid concentration adjustment function, which can increase the concentration of the waste acid discharged from the purification process by adding concentrated sulfuric acid when the purification acid concentration is too low.

[0006] The utility model adopts the following technical scheme:

[0007] A supernatant storage tank with an acid concentration adjustment function includes a tank body, an exhaust tee, an acid addition four-way pipe, an acid addition pipe and an acid addition sleeve. A breathing port, an exhaust port and an acid inlet are arranged at the top of the tank body, and an acid outlet is arranged on the side surface of the lower part of the tank body. The breathing port of the tank body is communicated with the atmosphere, the exhaust port of the tank body is connected with the exhaust tee, the acid inlet of the tank body is connected with the acid addition sleeve and the acid addition four-way pipe. The acid addition four-way pipe is provided with four interfaces: a tank body interface, a dilute acid inlet, an acid addition pipe interface and an air outlet. The tank body interface of the acid addition four-way pipe is connected to the acid inlet at the top of the tank body. The dilute acid inlet of the acid addition four-way pipe is used to connect to an external dilute acid inlet pipe. The acid addition pipe interface of the acid addition four-way pipe is communicated with the acid addition pipe. The air outlet of the acid addition four-way pipe is communicated with the exhaust tee. The three interfaces of the exhaust tee are respectively communicated with the exhaust port of the tank body, the air outlet of the acid addition four-way pipe and an external negative pressure pipe interface.

[0008] Preferably, the acid addition pipe is hermetically connected to the acid addition pipe interface of the acid addition four-way pipe through a flange joint and a sealing ring, and is inserted into the lower part of the acid addition sleeve from top to bottom through the acid addition four-way pipe.

[0009] Preferably, the acid addition sleeve and the tank interface of the acid addition four-way pipe are hermetically connected to the acid inlet of the tank body through a flange joint and a sealing ring.

[0010] Preferably, the acid addition four-way interface of the exhaust three-way is hermetically connected to the gas outlet of the acid addition four-way through a flange joint and a sealing ring.

[0011] Preferably, the groove interface of the exhaust three-way is hermetically connected to the exhaust port at the top of the groove body through a flange joint and a sealing ring.

[0012] Preferably, the exhaust port of the exhaust three-way is hermetically connected to the external negative pressure pipe interface through a flange joint and a sealing ring.

[0013] Preferably, the exhaust three-way is made of carbon steel lined with F4. Its function is to collect and discharge the gas in the upper part of the supernatant tank body and the acid addition four-way to the external negative pressure connection pipe; the acid addition four-way is made of carbon steel lined with F4. Its function is to connect the tank body, the external dilute acid inlet pipe, the acid addition pipe and the exhaust three-way, introduce external dilute acid and externally added concentrated sulfuric acid, and at the same time discharge the acid mist and gas generated during the mixed acid process; the acid addition pipe is made of carbon steel fully wrapped with F4. Its function is to add concentrated sulfuric acid to the supernatant tank; the acid addition sleeve is made of carbon steel lined with F4. Its function is used for mixing concentrated sulfuric acid and dilute sulfuric acid.

[0014] Preferably, a supernatant pump is connected to the acid outlet of the tank body.

[0015] The beneficial effect of the present utility model is that the present utility model designs a supernatant storage tank with an acid concentration adjustment function. When the concentration of the purified circulating acid is too low and it is difficult to meet the requirements of the waste acid process for the concentration of the discharged waste acid, concentrated sulfuric acid can be supplemented into the purified circulating acid through this device to increase the sulfuric acid concentration of the purified circulating acid and the discharged waste acid. Description of the Drawings

[0016] Figure 1 is the structural schematic diagram of the present utility model;

[0017] Figure 2 is the structural schematic diagram of the tank body in the present utility model;

[0018] Figure 3 is the structural schematic diagram of the exhaust three-way in the present utility model;

[0019] Figure 4 is the structural schematic diagram of the acid addition four-way in the present utility model;

[0020] In the figure: 1. Tank body; 2. Exhaust three-way; 3. Acid addition four-way; 4. Acid addition pipe; 5. Acid addition sleeve; 11. Breather port; 12. Exhaust port; 13. Acid inlet; 14. Acid outlet; 21. External negative pressure pipe interface; 22. Groove interface; 23. Acid addition four-way interface; 31. Tank body interface; 32. Dilute acid inlet; 33. Acid addition pipe interface; 34. Gas outlet. Detailed Embodiments

[0021] The technical solution of the present utility model will be further specifically described below through specific embodiments in conjunction with the accompanying drawings:

[0022] Embodiment: As Figure 1 shown, a supernatant storage tank with an acid concentration adjustment function includes a tank body 1, an exhaust three-way 2, an acid addition four-way 3, an acid addition pipe 4, and an acid addition sleeve 5.

[0023] As Figure 2 shown, a breathing port 11, an exhaust port 12, and an acid inlet 13 are provided at the top of the tank body. The breathing port 11 is communicated with the atmosphere, the exhaust port 12 is connected to the exhaust three-way 2, and the acid inlet 13 is connected to the acid addition sleeve 5 and the acid addition four-way 3. An acid outlet 14 is provided on the side of the lower part of the tank body for connecting to a supernatant pump.

[0024] As Figure 3 shown, the exhaust three-way is provided with: an external negative pressure pipe interface 21, a tank interface 22, and an acid addition four-way interface, a total of 3 interfaces, which are respectively connected to: an external negative pressure pipe, the exhaust port 12 of the supernatant tank body, and the gas outlet 34 of the acid addition four-way. Its function is to connect the external negative pressure pipe, the tank body 1, and the acid addition four-way 3, and discharge the acid mist and gas in the tank body 1 and the acid addition four-way 3 to the external negative pressure pipe.

[0025] As Figure 4 shown, the acid addition four-way is provided with: a tank body interface 31, a dilute acid inlet 32, an acid addition pipe interface 33, and a gas outlet 34, a total of 4 interfaces, which are respectively connected to: the acid inlet 13 of the supernatant tank body, an external dilute acid inlet pipe, the acid addition pipe 4, and the exhaust three-way 2. Its function is to connect the tank body 1, the external dilute acid inlet pipe, the acid addition pipe 4, and the exhaust three-way 2, introduce external dilute acid and externally added concentrated sulfuric acid, and at the same time discharge the acid mist and gas generated during the mixing of the mixed acid.

[0026] The function of the acid addition pipe 4 is to add concentrated sulfuric acid to the supernatant tank.

[0027] The function of the acid addition sleeve 5 is for mixing concentrated sulfuric acid and dilute sulfuric acid.

[0028] The specific implementation process of the present utility model:

[0029] Normally: The purified dilute acid flows from the dilute acid inlet 32 of the acid addition four-way 3 through the acid addition four-way 3 and the acid addition sleeve 5 into the tank body 1 of the supernatant tank, and then discharges from the acid outlet 14 at the lower part of the tank body 1. The sulfur-containing gas in the tank body 1 and the acid addition four-way 3 is discharged to the outside by the exhaust three-way 2 under the action of external negative pressure. To avoid too low negative pressure in the tank body 1, external air flows into the tank body 1 through the breathing port 11 of the tank body. At this time, no concentrated sulfuric acid is added to the acid addition pipe 4.

[0030] When the acid concentration of the purification circulating acid is too low: External concentrated sulfuric acid is added through the acid addition pipe 4 into the acid addition sleeve 5, where it mixes with the purified dilute acid in the tank body, releasing a large amount of heat and generating a large amount of acid mist simultaneously. The purified dilute acid flowing in from the dilute acid inlet 32 of the acid addition four-way pipe 3 further mixes with the concentrated sulfuric acid in the acid addition four-way pipe 3. While adjusting the acid concentration, it takes away the heat generated by the sulfuric acid mixture. The mixed dilute acid is discharged from the lower acid outlet 14 of the tank body 1 and sent into the purification circulation system by the supernatant pump. The sulfur-containing gas and acid mist in the tank body 1 and the acid addition four-way pipe 3 are discharged to the external negative pressure pipe network by the exhaust three-way pipe 2 under the action of external negative pressure. To avoid too low negative pressure in the tank body 1, external air flows into the tank body 1 through the tank body breathing port 11.

[0031] The above-described embodiments are only a preferred solution of the present utility model and do not impose any form of limitation on the present utility model. There are other variants and modifications without exceeding the technical solutions recorded in the claims.

Claims

1. A supernatant liquid storage tank with acid concentration adjustment function, characterized in that: The utility model comprises a tank body, an exhaust tee, an acid adding four-way, an acid adding pipe and an acid adding sleeve. A breathing port, an exhaust port and an acid inlet are provided on the top of the tank body, an acid outlet is provided on the side of the lower part of the tank body, the breathing port of the tank body is connected with the atmosphere, the exhaust port of the tank body is connected with the exhaust tee, the acid inlet of the tank body is connected with the acid adding sleeve and the acid adding four-way, the acid adding four-way is provided with four interfaces, namely, a tank body interface, a diluted acid inlet, an acid adding pipe interface and an air outlet. The tank body interface of the acid adding four-way is connected with the acid inlet on the top of the tank body, the diluted acid inlet of the acid adding four-way is used to connect with an external diluted acid inlet pipe, the acid adding pipe interface of the acid adding four-way is connected with the acid adding pipe, the air outlet of the acid adding four-way is connected with the exhaust tee, and the three interfaces of the exhaust tee are respectively connected with the tank body exhaust port, the air outlet of the acid adding four-way and the external negative pressure pipe interface.

2. The supernatant liquid storage tank with acid concentration adjustment function according to claim 1, characterized in that: The acid adding pipe is sealed and connected with the acid adding pipe interface of the acid adding spool through a flange joint and a sealing ring, and is inserted into the lower part of the acid adding sleeve from top to bottom through the acid adding spool.

3. The supernatant liquid storage tank with acid concentration adjustment function according to claim 1, characterized in that: The tank interfaces of the acid adding sleeve and the acid adding cross are sealed and connected to the acid inlet of the tank body through flange joints and sealing rings.

4. The supernatant liquid storage tank with acid concentration adjustment function according to claim 1, characterized in that: The acid adding four-way interface of the exhaust three-way is sealed and connected to the gas outlet of the acid adding four-way through a flange joint and a sealing ring.

5. The supernatant liquid storage tank with acid concentration adjustment function according to claim 1, characterized in that: The slot interface of the exhaust tee is sealed and connected to the exhaust port at the top of the slot body through a flange joint and a sealing ring.

6. The supernatant liquid storage tank with acid concentration adjustment function according to claim 1, characterized in that: The exhaust port of the exhaust tee is sealed and connected to the external negative pressure pipe interface through a flange joint and a sealing ring.

7. The supernatant liquid storage tank with acid concentration adjustment function according to claim 1, characterized in that: The acid outlet of the tank body is connected with a supernatant pump.

Images