CN2188591Y - Multipole type unit electrolytic bath - Google Patents

Abstract

The utility model belongs to a multipole type unit electrolytic tank. The utility model is composed of a cathode disk and an anode disk which are arranged back to back and are connected to electricity, a framework which is composed of four frames, and a cathode and an anode which are welded on the cathode disk and the anode disk through electric conduction rib strips. Frame strips adopt combined rigid structures in order to be convenient for welding with the disks, and therefore, the whole structure is a rigid structure. The utility model has the advantages of simple structure, easy processing and favorable rigidity and intensity, and the utility model is not easy to deform and leak.

Description

Multipole type unit electrolytic bath

The utility model relates to a kind of multipole type unit electrolytic bath.

In electrolytic industry, the aqueous solution of electrolytic alkali metallic chloride in the chlorine industry especially, generally exemplary application ion-exchange membrane electrolysis devices all.Opinion has various unit electrolytic bath structure with the multipole type electrolyzer.It is to adopt a blast compound three-layer composite board to connect two opposite polarity two reaction chambers that a kind of multipole type unit electrolytic bath is arranged, and the weldment with stainless steel and two layers of composition board of blast compound titanium-steel surrounds frame all around.The weak point of the electrolyzer that forms with this unit groove is that the three-layer composite board cost is too high.In order to reduce cost, also have a kind of unit electrolytic bath, it is to make the discoid component that is made of buckle flange, framework wall and partition with whole plate, and two discoid components dispose back-to-back, be inserted in strip between the buckle flange and framework wall of each member, thereby form two reaction chambers.The weak point of this unit electrolytic bath is that rigidity and intensity are lower, and structure easily deforms; The shaping requirement on machining accuracy of discoid component is high, needs specific equipment; In addition, sealing is difficult for guaranteeing, the internals distortion takes place to leak and drive in the course of the work easily.

The purpose of this utility model is to design a kind of multipole type unit electrolytic bath, and this unit electrolytic bath is simple in structure, cost is low, easy processing and manufacturing, rigidity and intensity is good, sealing reliably, not yielding and leak.

Negative electrode and anode that the multipole type unit electrolytic bath of the utility model design is welded on the anode and cathode dish by framework configuration back-to-back, that constitute at the cathode disc that connects on the electricity and anode disc, by four frame bars, by the conduction rib are formed.Cathode disc and anode disc with the discoid component of sidewall, have import and export for all around on the sidewall.The frame bar by the frame bar body of an end band grooves on two sides, fit in fitting strip in the grooves on two sides, the anode seal of fixedlying connected with fitting strip at an end of frame bar body forms.On relative frame bar, be connected with the inlet and outlet piping of electrolysis liquid and electrolytic production circulation.Fixedly connected with frame bar body around the cathode disc, fixedly connected with anode seal around the anode disc.

In order further to reduce cost, prevent the corrosion of negative electrode medium, at the negative electrode sealing member that the other end of frame bar body is fixedlyed connected with frame bar body in addition, cathode disc is fixedlyed connected with the negative electrode sealing member.

In order to improve the electroconductibility between cathode disc and the anode disc, between the anode and cathode dish, also has conducting plates.

In order further to improve the rigidity and the intensity of unit electrolytic bath, between the anode and cathode dish, also have two ends to be plugged on the intrinsic supporting plate of frame bar.

The multipole type unit electrolytic bath of the utility model design has following advantage.

1. adopt discoid component simple in structure can be shaped with general device, simple in structure, processing easily.

2. adopt the frame bar structure of combination, not only cost low, can solve the different Welding Problems of anode and cathode material, and formed framework is a rigid member, the in use not yielding anode and cathode dish that also can not drive is out of shape, and the sealing member at two ends can reach the accurate dimensions requirement by machining.Guarantee the size of pole span.

3. sealing is reliable, is difficult for leaking.

4. rigidity and intensity are good, especially have the unit electrolytic bath of supporting plate.

Fig. 1 is the front view of the multipole type unit electrolytic bath of the utility model design.

Fig. 2 is the vertical view of Fig. 1.

Fig. 3 is the side-view of Fig. 1.

Fig. 4 is the structure iron of cloudy (sun) utmost point dish.

Fig. 5 is the stereographic map of frame bar.

The synoptic diagram of the electrolyzer that Fig. 6 is made up of a plurality of unit electrolytic baths.

Below in conjunction with accompanying drawing embodiment of the present utility model and effect thereof are further described.

Fig. 1～Fig. 3 is the structure iron of the multipole type unit electrolytic bath of the utility model design.It by configuration back-to-back, the cathode disc 1 and the anode disc 2 that on electricity, connect, the framework 3 that is made of four frame bars, the negative electrode 5 and the anode 6 that are welded on the anode and cathode dish by conduction rib 4 are formed.Cathode disc 1 can process with the sheet alloy of nickel, stainless steel or these metals, can be one-piece construction, also can cutting after four welded corner joints form, the conduction rib in the cathode disc can be made with the same material of cathode disc.Negative electrode 5 can adopt the cathode disc identical materials, or is coated with active coating on its surface again, also can adopt the surface to be coated with unlike material with radium niobium nickel coating, and these materials all can be continued to use the cathode material of using in the normally used electrolyzer.Space between cathode disc and the negative electrode is cathode compartment.Anode disc 2 can adopt titanium or titanium alloy, and its working method can be the same with the working method of cathode disc.Anode 6 can use the employed anode material of any general aqueous solution of electrolytic alkali metallic chloride.As titanium or titanium alloy, and be coated with to contain the active coating of elements such as ruthenium, titanium, iridium at these material surfaces again.Space between anode disc and the anode is the anolyte compartment, and the conduction rib in the anolyte compartment also material with anode disc is identical.On electricity, connect between cathode disc 1 and the anode disc 2.They can lean on two tray bottom closely to contact or add conducting plates 7 back welding realizations between two dishes and be electrically connected.Add conducting plates 7 and again anode and cathode dish and conducting plates 7 are welded and fused, better conductive effect is then arranged.All should be connected with turnover mouth of pipe (see figure 4) on the anode and cathode dish respectively.Framework 3 is made of four frame bars.Can adopt mode of connection such as welding, screwing between each frame bar.The structure of frame bar is seen Fig. 5, it by frame bar body 9, fit in two fitting strips 10,11 in the frame bar body grooves on two sides, the anode seal 12 of fixedlying connected with two fitting strips 10,11 at frame bar body one end, form at the fixedly connected negative electrode sealing member 13 of the other end.Frame bar body can use inexpensive plain carbon stool.Anode seal 12 and fitting strip 10,11 general uses and the anode disc identical materials are so that the welding between realization and the anode disc 2.Can adopt between fitting strip 10,11 and frame bar body that screw is connected, mode of connection such as bonding.And the negative electrode sealing member 13 general uses metallic substance identical with negative electrode, the frame bar body that they and carbon steel are made is easy to weld together, if the frame body also uses materials such as stainless steel to make, then the negative electrode sealing member just can not need, and cathode disc just can be welded direct on the frame bar body.Then four such frame bars are connected and composed a framework by size.The framework itself that can see this structure is exactly a kind of rigid structure, in use can not be out of shape, and carry out machining in the surface of anticathode sealing member and anode seal respectively according to the needs of pole span, so that reach the requirement of surfaceness and size.The import and export of corresponding electrolytic solution and the electrolytic production circulation mouth of pipe should be arranged on the framework.Anode and cathode dish, conducting plates and supporting plate are installed in this framework again, and as requested conducting plates regulating YIN and YANG utmost point dish is welded together, be solded into conduction floor and negative electrode, anode again in the anode and cathode dish, this has just constituted the multipole type unit electrolytic bath of the utility model design.Adopt several unit electrolytic baths of the design's structure, put into ion-exchange membrane between each groove, just can constitute electrolyzer after the arranged in order.Anode disc and cathode disc are used the sheet material of 1.5 mm thick and 2 mm thick respectively.Adopt press shaping die, be welded all around.The conduction rib is welded in the inboard of dish every 9.5 centimetres of spacings.Each conducts electricity 20 in the hole of 12 millimeters of diameters on the rib, and electrolysis liquid and electrolytic production pass through.Anode is porous plate or the mesh plate that the titanium plate of 1.2 mm thick is made, and promptly can beat a plurality of holes onboard, also can be that the net that sheet material draws in the net to offset formation rolls, and then be coated with active coating.Negative electrode is porous plate or the mesh plate made from 1.5 millimeters stainless steel plate.Conducting plates is the composition board of steel and titanium, and is with spot welding that it is welded together with the cathode and anode dish respectively.Supporting plate is with general steel plate bar.The thickness of conducting plates and supporting plate is 4 millimeters.That the anode and cathode dish is of a size of is long * wide * high=2356 * 1156 * 26 millimeters.The synoptic diagram of the electrolyzer that constitutes with the 98 pairs of unit electrolytic baths is seen Fig. 6.This device is used for electrolytic saltwater and produces caustic soda and chlorine.According to anode material inlet NaCl concentration 305g/l, outlet 180g/l, negative electrode material NaOH entrance concentration 30%, the technology of outlet 32% is carried out.The result is as follows: current efficiency 97%, unit electrolytic bath bath voltage 3.15～3.2V, direct current consumption≤2250KWH/t100%NaOH.In use, because the rigidity and the heatproof of device are better, therefore can deform, leak; Because pole span precision height in use can not change, so bath voltage is stable; Even when increasing because of a variety of causes pressure reduction in the process, unit groove can not be out of shape yet, and more can not destroy ionic membrane.

Claims (4)

1, a kind of multipole type unit electrolytic bath, it comprise back-to-back configuration, at the cathode disc that connects on the electricity and anode disc, framework, be welded to negative electrode and anode on the anode and cathode dish by the conduction rib, it is characterized in that said two dishes for around with the discoid component of sidewall, import and export are arranged on the sidewall

Said framework is made of four frame bars, said frame bar by the frame bar body of an end band grooves on two sides, fit in fitting strip in the grooves on two sides, the anode seal of fixedlying connected with fitting strip at an end of frame bar body forms, on relative edge's moulding, be connected with the turnover mouth of pipe, fixedly connected with frame bar body around the said cathode disc, fixedly connected with anode seal around the said anode disc.

2,, it is characterized in that the negative electrode sealing member of fixedlying connected with frame bar body, the fixedlying connected with the negative electrode sealing member of said cathode disc all around at the other end of frame bar body by the said multipole type unit electrolytic bath of claim 1 with ining addition.

3, by claim 1 or 2 said multipole type unit electrolytic baths, it is characterized in that between said negative and positive dish, also being fixedly connected with conducting plates.

4,, it is characterized in that between said negative and positive dish, also having two ends to be plugged on the intrinsic supporting plate of frame bar by the said multipole type unit electrolytic bath of claim 3.

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