Centralized defoaming device for alkali liquor

Abstract

The utility model discloses an alkali liquor centralized defoaming device which comprises an alkali liquor recycling box, a defoaming agent storage tank, a liquid pump and an annular liquid distribution pipe, the top of the alkali liquor recycling box is provided with an alkali liquor leading-in pipe joint pointing to the lower portion, and a stand column located below the alkali liquor leading-in pipe joint is vertically arranged in the alkali liquor recycling box. A cone is arranged at the top of the stand column, the annular liquid distribution pipe is concentrically suspended on the outer side of the cone, a defoaming agent leading-in pipe is arranged between the defoaming agent storage tank and an inlet of the liquid pump, and a defoaming agent leading-out pipe is arranged between an outlet of the liquid pump and the annular liquid distribution pipe. First atomizing nozzles pointing to the cone are arranged on the inner side of the annular liquid distribution pipe at intervals, and second atomizing nozzles pointing to the lower portion are arranged at the bottom of the annular liquid distribution pipe at intervals. According to the concentrated defoaming device for the alkali liquor, the concentrated contact between foam and a defoaming agent is enhanced, and the defoaming effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lye defoaming, in particular to a centralized lye defoaming device. Background Art

[0002] Before strip annealing, the surface needs to be cleaned with lye to remove oil stains and other particulate matters to avoid affecting the surface quality of the strip after annealing.

[0003] In order to reduce costs, the lye after strip cleaning can be recycled, but the recycled lye contains a certain amount of foam and needs to be defoamed. The invention patent application with publication number CN107201528A discloses a lye defoamer dosing system and dosing method for a cold rolling cleaning section, which directly adds a defoamer to the lye below through a spray head. Although it can eliminate local foam, the foam is easy to spread in the tank, and the defoaming efficiency is low and needs to be improved. Content of the Utility Model

[0004] The purpose of the utility model is to provide a centralized lye defoaming device to carry out centralized elimination of foam and reduce the problem of foam diffusion.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A centralized lye defoaming device includes: a lye recycling tank, a defoamer storage tank, a liquid pump, and an annular liquid distribution pipe. A lye inlet pipe joint pointing downward is arranged at the top of the lye recycling tank. A column is vertically arranged in the lye recycling tank below the lye inlet pipe joint. A cone is arranged at the top of the column. The annular liquid distribution pipe is concentrically suspended outside the cone. A defoamer inlet pipe is arranged between the defoamer storage tank and the inlet of the liquid pump. A defoamer outlet pipe is arranged between the outlet of the liquid pump and the annular liquid distribution pipe. First atomizing nozzles pointing to the cone are arranged at intervals inside the annular liquid distribution pipe. Second atomizing nozzles pointing downward are arranged at intervals at the bottom of the annular liquid distribution pipe.

[0007] Wherein, a bracket connected to the annular liquid distribution pipe is arranged in the lye recycling tank.

[0008] Wherein, a lye outlet pipe joint is arranged on one side of the lye recycling tank far from the lye inlet pipe joint.

[0009] Wherein, a guide post is vertically arranged in the lye recycling tank between the lye inlet pipe joint and the lye outlet pipe joint. A floating block is arranged on the guide post. An air knife pointing to the column is horizontally arranged on the floating block.

[0010] Wherein, a compressed air pipe joint is arranged at the top of the lye recycling tank. A flexible air pipe is arranged between the compressed air pipe joint and the air knife.

[0011] Among them, the defoamer storage tank and the liquid pump are respectively arranged above the lye recycling tank.

[0012] Advantages of the present utility model: An alkali solution centralized defoaming device, where the alkali solution enters the lye recycling tank through the lye inlet pipe joint, and diffuses along the surface of the cone when passing through the cone, exposing the foam in the alkali solution. The atomized defoamer is sprayed onto the cone by the first atomizing nozzle to achieve centralized defoaming, and the atomized defoamer is sprayed onto the lye below by the second atomizing nozzle to form a cylindrical defoamer atomization zone, intercepting the foam on the surface of the lye, further enhancing the contact between the foam and the defoamer and the defoaming effect. An air knife blows out an air flow to blow the foam far away from the column on the liquid surface towards the column direction for secondary defoaming. Description of the Drawings

[0013] Figure 1 is a schematic structural diagram of the present utility model;

[0014] Figure 2 is Figure 1 a schematic structural diagram of part A in Detailed Embodiments

[0015] The following combines Figures 1 to 2 and further illustrates the technical solutions of the present utility model through specific embodiments.

[0016] Such as Figure 1 and Figure 2 The shown alkali solution centralized defoaming device includes: a lye recycling tank 1, a defoamer storage tank 12, a liquid pump 2, and an annular liquid distribution pipe 17. A lye inlet pipe joint 4 pointing downward is provided at the top of the lye recycling tank 1. The lye inlet pipe joint 4 is externally connected to a lye recycling pipeline to introduce the used lye into the lye recycling tank 1.

[0017] A column 11 is vertically arranged in the lye recycling tank 1 below the lye inlet pipe joint 4. A cone 16 is integrally provided at the top of the column 11. The lye enters the lye recycling tank 1 through the lye inlet pipe joint 4 and diffuses along the surface of the cone 16 when passing through the cone 16, exposing the foam in the lye for subsequent defoaming.

[0018] The annular liquid distribution pipe 17 is concentrically suspended outside the cone 16. In this embodiment, a bracket 5 connected to the annular liquid distribution pipe 17 is provided in the lye recycling tank 1, and the structure is stable. The defoamer storage tank 12 and the liquid pump 2 are respectively arranged above the lye recycling tank 1 to reduce the floor area.

[0019] An antifoaming agent introduction pipe is provided between the antifoaming agent storage tank 12 and the inlet of the liquid pump 2, and an antifoaming agent export pipe 3 is provided between the outlet of the liquid pump 2 and the annular liquid distribution pipe 17. The antifoaming agent in the antifoaming agent storage tank 12 is pressurized by the liquid pump 2 and then sent into the annular liquid distribution pipe 17.

[0020] As Figure 2 shown, first atomizing nozzles 14 pointing to the cone 16 are arranged at intervals inside the annular liquid distribution pipe 17. The atomized antifoaming agent is sprayed onto the cone 16 by the first atomizing nozzles 14 to achieve centralized defoaming of the foam on the surface of the cone 16.

[0021] Second atomizing nozzles 15 pointing downward are arranged at intervals at the bottom of the annular liquid distribution pipe 17. The atomized antifoaming agent is sprayed onto the lye below by the second atomizing nozzles 15 to form a cylindrical antifoaming agent atomization zone, intercepting the foam on the surface of the lye, and further improving the contact between the foam and the antifoaming agent and the effect of centralized defoaming. The first atomizing nozzles 14 and the second atomizing nozzles 15 spray the antifoaming agent by high-pressure atomization, which is beneficial to reducing the dosage of the antifoaming agent.

[0022] An alkali liquid export pipe joint 10 is provided on one side of the alkali liquid reuse tank 1 away from the alkali liquid inlet pipe joint 4, which is convenient for exporting and reusing the alkali liquid. A guide post 8 is vertically arranged in the alkali liquid reuse tank 1 between the alkali liquid inlet pipe joint 4 and the alkali liquid export pipe joint 10. A floating block 9 is arranged on the guide post 8, and the guide post 8 penetrates through the floating block 9 to guide the up and down floating of the floating block 9.

[0023] An air knife 6 pointing to the column 11 is horizontally arranged on the floating block 9. A compressed air pipe joint 7 is arranged at the top of the alkali liquid reuse tank 1. A flexible air pipe 13 is provided between the compressed air pipe joint 7 and the air knife 6. The compressed air pipe joint 7 is externally connected to an air compressor to send compressed air into the air knife 6. The air knife 6 is on the floating block 9 and rises and falls with the change of the liquid level of the alkali liquid, and blows out an air flow to blow the foam far away from the column 11 on the liquid surface towards the column 11 direction, and uses the atomized antifoaming agent above the column 11 for secondary defoaming to reduce the residue of the foam on the surface of the alkali liquid.

[0024] The above content is only the preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manners and application scopes. The content of this specification should not be construed as a limitation to the present invention.

Claims

1. An alkali solution centralized defoaming device, characterized in that, Including: An alkali solution recycling tank, an antifoaming agent storage tank, a liquid pump, and an annular liquid distribution pipe. A downward-pointing alkali solution inlet pipe joint is provided at the top of the alkali solution recycling tank. A vertical column is provided in the alkali solution recycling tank below the alkali solution inlet pipe joint. A cone is provided at the top of the column. The annular liquid distribution pipe is concentrically suspended outside the cone. An antifoaming agent inlet pipe is provided between the antifoaming agent storage tank and the inlet of the liquid pump. An antifoaming agent outlet pipe is provided between the outlet of the liquid pump and the annular liquid distribution pipe. First atomizing nozzles pointing at the cone are spaced inside the annular liquid distribution pipe. Second atomizing nozzles pointing downward are spaced at the bottom of the annular liquid distribution pipe.

2. The lye centralized defoaming device according to claim 1, characterized in that, A bracket connected to the annular liquid distribution pipe is provided in the alkali solution recycling tank.

3. The lye centralized defoaming device according to claim 1, wherein, An alkali solution outlet pipe joint is provided on one side of the alkali solution recycling tank away from the alkali solution inlet pipe joint.

4. The lye centralized defoaming device according to claim 1, wherein A guide post is vertically provided in the alkali solution recycling tank between the alkali solution inlet pipe joint and the alkali solution outlet pipe joint. A floating block is provided on the guide post. An air knife pointing at the column is horizontally provided on the floating block.

5. The lye centralized defoaming device according to claim 4, characterized in that, A compressed air pipe joint is provided at the top of the alkali solution recycling tank. A flexible air pipe is provided between the compressed air pipe joint and the air knife.

6. The lye centralized defoaming device according to claim 1, characterized in that, The antifoaming agent storage tank and the liquid pump are respectively provided above the alkali solution recycling tank.

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