Defoaming device for calcium chloride production

Abstract

The utility model relates to the technical field of calcium chloride production, and particularly discloses a defoaming device for calcium chloride production, which comprises a packed tower, the bottom end of one side of the packed tower and the exhaust end of a reactor are connected and provided with a gas delivery pipe, and a packing bin positioned above the gas delivery pipe is arranged in the middle section of the inside of the packed tower; a filtering filler is contained and filled in the filler bin, a defoaming flushing mechanism which is located above the filler bin and used for flushing the filler bin and bubble-containing tail gas is arranged at the top end of the side part of the filler tower, and an exhaust pipe used for outputting carbon dioxide gas outwards is arranged at the top of the filler tower; a liquid discharge pipe used for discharging waste water generated by flushing the foam-containing tail gas in the packed tower is arranged between one end, far away from the gas conveying pipe, of the bottom of the packed tower and the neutralization tank, so that the problems that carbon dioxide generated in the traditional calcium chloride production process carries part of calcium chloride solution when being discharged, a large amount of foams are generated, and the production efficiency and the production quality are influenced are solved; and waste of raw materials is also caused.

Description

Technical Field

[0001] This application relates to the field of calcium chloride production technology, and specifically discloses a defoaming device for calcium chloride production. Background Technology

[0002] Industrial production of calcium chloride typically employs the acid-calcium process, which yields calcium chloride products with high hardness. The typical process for producing calcium chloride using the acid-calcium process involves: reacting limestone with hydrochloric acid in a reactor to generate calcium chloride solution and carbon dioxide gas; then adjusting the calcium chloride solution with lime milk; and finally obtaining solid calcium chloride dihydrate through a series of operations including filtration, evaporation, crystallization, heating, and concentration.

[0003] When producing calcium chloride using the existing acid-calcium process, carbon dioxide gas carries a large amount of calcium chloride solution with it after exiting the reactor's exhaust end, resulting in a large amount of foam. If the foamy tail gas carrying the carbon dioxide is not defoamed in time, it will affect the efficiency of calcium chloride production and the quality of the calcium chloride solution. Furthermore, the carbon dioxide gas carries away some of the calcium chloride solution when it is discharged, which will also waste raw materials and increase production costs. Therefore, the inventors have provided a defoaming device for calcium chloride production to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to solve the problem that carbon dioxide generated during the traditional calcium chloride production process carries some calcium chloride solution with it, which not only produces a lot of foam, affecting production efficiency and quality, but also wastes raw materials.

[0005] To achieve the above objectives, the basic solution of this utility model provides a defoaming device for calcium chloride production, including a packed tower for filtering and transferring carbon dioxide gas. A gas supply pipe for conveying foamy tail gas into the packed tower is installed at one bottom end connected to the exhaust end of the reactor. A packing chamber is located above the gas supply pipe in the middle section of the packed tower. The packing chamber is filled with filter packing for filtering the foamy tail gas. A defoaming flushing mechanism is located above the packing chamber at the top of the side of the packed tower for flushing the packing chamber and the foamy tail gas. An exhaust pipe for discharging carbon dioxide gas is located at the top of the packed tower. A drain pipe for discharging wastewater generated during flushing the foamy tail gas is located between the bottom end of the packed tower away from the gas supply pipe and the neutralization tank.

[0006] The principle and effect of this basic scheme are as follows:

[0007] 1. Compared with the prior art, this utility model uses a packed chamber filled with filter packing inside the packed tower to facilitate the filtration of foamy tail gas, allowing carbon dioxide gas to be discharged directly from the top of the packed tower. By setting up a defoaming and rinsing mechanism, the foamy tail gas can be rinsed, thereby realizing the conversion of calcium chloride from a bubble to a liquid state of solution, achieving the purpose of defoaming. Defoaming treatment can be achieved without the use of additional auxiliary defoaming agents. The drain pipe is connected between the bottom of the packed tower and the neutralization tank, which facilitates the unified discharge of calcium chloride solution, neutralization treatment and recycling, thereby avoiding the waste of calcium chloride solution raw materials. It solves the problem that the carbon dioxide generated in the traditional calcium chloride production process carries some calcium chloride solution with it when discharged, which not only generates a lot of foam, affecting production efficiency and quality, but also causes waste of raw materials.

[0008] Furthermore, the defoaming and rinsing mechanism includes a water supply tank, an inlet pipe installed between one side of the water supply tank and the outer top of the packed tower, a spray pipe installed inside the packed tower and connected to the inlet pipe, a water valve installed on the inlet pipe, and a water pump installed on the inlet pipe and located between the water tank and the water valve. Several spray outlet pipes are evenly installed at the bottom of the spray pipe. By setting up the water pump and water valve, water from the water supply tank is transported through the inlet pipe to the spray pipe and spray outlet pipe, thereby achieving a spraying operation at the top of the packed tower. This achieves the purpose of converting the air bubbles in the foamy exhaust gas into a calcium chloride solution, not only realizing the defoaming operation but also enabling the recovery of the calcium chloride solution.

[0009] Furthermore, each of the spray outlet pipes is equipped with a finer nozzle. By setting finer nozzles, the spray water falling onto the packing chamber is more evenly distributed, thereby eliminating foam more comprehensively.

[0010] Furthermore, the outlet end of the exhaust pipe is connected to a waste gas neutralization tower for neutralizing carbon dioxide gas. By connecting the exhaust pipe to the waste gas neutralization tower, it is convenient to collect and neutralize carbon dioxide in a unified manner, avoiding the emission of carbon dioxide and causing environmental pollution. At the same time, it is also convenient to reuse the neutralized and converted carbon dioxide.

[0011] Furthermore, the packing chamber includes a chamber body for accommodating the filter packing material and a filter screen located at the bottom of the chamber body, allowing gas and water to pass through. The outer side of the chamber body is detachably connected to the inner wall of the packing tower. The chamber body and filter screen facilitate the accommodation and support of the filter packing material. The filter screen allows carbon dioxide exhaust gas to flow through and, after passing through the filter packing material, achieves gas-foam separation and filtration. Simultaneously, it allows water to flow smoothly through the packing chamber during spray pipe operation, converting calcium chloride foam into calcium chloride solution, thus improving the efficiency of calcium chloride recovery and resulting in better defoaming effects. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 A schematic diagram of a defoaming device for calcium chloride production according to an embodiment of this application is shown. Detailed Implementation

[0014] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0015] The reference numerals in the accompanying drawings include: 1. Packed tower, 2. Gas delivery pipe, 3. Packed silo, 4. Filter packing, 5. Exhaust pipe, 6. Drain pipe, 7. Water inlet pipe, 8. Spray pipe, 9. Water valve, 10. Water pump, 11. Spray outlet pipe, 12. Fine spray nozzle, 13. Filter screen, 14. Silo body, 15. Neutralization tank.

[0016] A defoaming device for calcium chloride production, implementing, for example... Figure 1 As shown: a packed tower 1 for filtering and transferring carbon dioxide gas is included. The bottom left side of the packed tower 1 is connected to the exhaust end of the reactor and is equipped with a gas supply pipe 2 for supplying foamy tail gas into the packed tower 1. The middle section of the packed tower 1 is provided with a packing chamber 3 located above the gas supply pipe 2. The packing chamber 3 is filled with filter packing 4 for filtering foamy tail gas. The top side of the packed tower 1 is provided with a defoaming flushing mechanism located above the packing chamber 3 for flushing the packing chamber 3 and the foamy tail gas. The top of the packed tower 1 is provided with an exhaust pipe 5 for discharging carbon dioxide gas. The bottom of the packed tower 1, away from the gas supply pipe 2, is connected to the neutralization tank 15 and is provided with a drain pipe 6 for discharging wastewater generated from flushing the foamy tail gas in the packed tower 1.

[0017] The defoaming and rinsing mechanism includes a water supply tank, an inlet pipe 7 installed between one side of the water supply tank and the outer top of the packing tower 1, a spray pipe 8 installed inside the packing tower 1 and connected to the inlet pipe 7, a water valve 9 installed on the inlet pipe 7, and a water pump 10 installed on the inlet pipe 7 and located between the water tank and the water valve 9. Multiple spray outlet pipes 11 are evenly installed at the bottom of the spray pipe 8. Each spray outlet pipe 11 has a finer nozzle 12 at its outlet end.

[0018] The exhaust pipe 5 is connected to a waste gas neutralization tower for neutralizing carbon dioxide gas.

[0019] The packing chamber 3 includes a chamber body 14 for accommodating filter packing 4 and a filter screen 13 located at the bottom of the chamber body 14 that allows gas and water to pass through. The outer side of the chamber body 14 is detachably connected to the inner wall of the packing tower 1.

[0020] In the specific implementation of this utility model, a packed tower 1 is first set up. The carbon dioxide tail gas generated by the calcium chloride reaction is discharged from the reactor through the gas supply pipe 2 on the side of the reactor. During the discharge process, the carbon dioxide carries calcium chloride foam and is discharged into the packed tower 1 through the gas supply pipe 2. The foamy tail gas flows to the exhaust pipe 5 at the top of the packed tower 1. During this process, the foamy tail gas flows through the filter screen 13 at the bottom of the packed chamber 3 and the filter packing 4 inside the packed chamber 3. The calcium chloride bubbles are blocked and attached to the surface of the filter packing 4, while the carbon dioxide tail gas directly passes through the packed chamber 3 and flows to the exhaust pipe 5 for discharge and is transported to the waste gas neutralization tower. Neutralization is carried out; on the other hand, while the reactor discharges foamy tail gas, the water valve 9 and water pump 10 are turned on to draw water from the water supply tank and pump it through the water inlet pipe 7 and the spray pipe 8 to the fine nozzle 12 of the spray outlet pipe 11 and spray it down to spray and humidify the filter packing 4 in the packing chamber 3 below the spray pipe 8, thereby washing away the calcium chloride foam attached to the surface of the filter packing 4. After washing away the calcium chloride foam, a calcium chloride solution is obtained. The calcium chloride solution falls into the bottom of the packing tower 1 and is discharged from the packing tower 1 through the drain pipe 6. The discharged packing tower 1 flows into the neutralization tank 15 for neutralization treatment, thereby reusing the calcium chloride solution.

[0021] Compared with the prior art, this utility model uses a packing chamber 3 filled with filter packing 4 inside the packed tower 1 to facilitate the filtration of foamy tail gas, allowing carbon dioxide gas to be discharged directly from the top of the packed tower 1. By setting up a defoaming and rinsing mechanism, the foamy tail gas can be rinsed, thereby realizing the conversion of calcium chloride from a bubble to a liquid state of solution, achieving the purpose of defoaming. Defoaming treatment can be achieved without the use of additional auxiliary defoaming agents. The drain pipe 6 is connected between the bottom of the packed tower 1 and the neutralization tank 15, which facilitates the unified discharge of calcium chloride solution, neutralization treatment and recycling, thereby avoiding the waste of calcium chloride solution raw materials. It solves the problem that the carbon dioxide generated in the traditional calcium chloride production process carries some calcium chloride solution with it when discharged, which not only generates a lot of foam, affecting production efficiency and quality, but also causes waste of raw materials.

[0022] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A defoaming device for calcium chloride production, characterized in that: The system includes a packed tower for filtering and transferring carbon dioxide gas. One bottom end of the packed tower is connected to the exhaust end of the reactor and is equipped with a gas supply pipe for supplying foamy tail gas into the packed tower. The middle section of the packed tower is equipped with a packing chamber located above the gas supply pipe. The packing chamber is filled with filter packing for filtering the foamy tail gas. The top side of the packed tower is equipped with a defoaming flushing mechanism located above the packing chamber for flushing the packing chamber and the foamy tail gas. The top of the packed tower is equipped with an exhaust pipe for discharging carbon dioxide gas. The bottom end of the packed tower away from the gas supply pipe is connected to the neutralization tank and is equipped with a drain pipe for discharging wastewater generated from flushing the foamy tail gas in the packed tower.

2. The defoaming device for calcium chloride production according to claim 1, characterized in that, The defoaming and rinsing mechanism includes a water supply tank, an inlet pipe installed between one side of the water supply tank and the top of the outer side of the packing tower, a spray pipe installed inside the packing tower and connected to the inlet pipe, a water valve installed on the inlet pipe, and a water pump installed on the inlet pipe and located between the water tank and the water valve. Several spray outlet pipes are evenly installed at the bottom of the spray pipe.

3. The defoaming device for calcium chloride production according to claim 2, characterized in that, The outlet end of each spray water pipe is equipped with a fine spray nozzle.

4. The defoaming device for calcium chloride production according to claim 3, characterized in that, The exhaust pipe is connected to a waste gas neutralization tower for neutralizing carbon dioxide gas.

5. A defoaming device for calcium chloride production according to claim 4, characterized in that, The packing chamber includes a chamber body for accommodating filter packing and a filter screen located at the bottom of the chamber body that allows gas and water to pass through. The outer side of the chamber body is detachably connected to the inner side wall of the packing tower.

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