Chlorine introducing device for chlorination kettle and chlorination kettle

Abstract

The utility model discloses a chlorine introducing device for a chlorination kettle and the chlorination kettle, and belongs to the technical field of chlorine introducing devices. According to the technical scheme, the device comprises a chlorine introducing pipe, a turned-over edge is arranged at the chlorine inlet end of the chlorine introducing pipe, an umbrella cap is arranged at the other end of the chlorine introducing pipe, and a plurality of chlorine outlets are formed in the chlorine introducing pipe in the circumferential direction; one end, provided with the umbrella cap, of the chlorine introducing pipe extends into the chlorination kettle from the discharge port of the chlorination kettle, the umbrella cap is positioned below a stirring device of the chlorination kettle, the chlorine inlet end is detachably fixed at the discharge port and is communicated with a discharge pipe of the chlorination kettle, and the discharge pipe is connected with a chlorine inlet pipe. The utility model can effectively solve the problem that the chlorine is distributed too intensively, increases the chlorine utilization rate while accelerating the chlorine introduction speed, improves the product performance, and reduces the energy consumption.

Description

Technical Field

[0001] The utility model relates to the technical field of chlorine-passing devices, in particular to a chlorine-passing device for a chlorination kettle and a chlorination kettle. Background Art

[0002] In the production process of acid phase chlorinated polyethylene (hereinafter referred to as CPE), the enamel port of the chlorination kettle is usually directly used as the chlorine port, and chlorine passes through a chlorine port at the bottom of the kettle, vertically enters the kettle, and contacts with the material. In this process, since the distribution of chlorine is relatively concentrated after entering the kettle, the chlorine is vertically scattered upward, and does not contact with the material over a large area, so that the material reaction is uneven, and the unreacted chlorine breaks the water and enters the gas phase in the kettle. As the chlorine is introduced, the chlorine that is scattered increases the pressure in the kettle, and this part of the chlorine can only be absorbed and treated with alkali solution, which causes the waste of chlorine, while the product performance is reduced and the tail gas treatment amount is increased. Chinese utility model patent CN202983646U discloses an improved chlorine-passing device, including a chlorination kettle, a stirrer is provided in the chlorination kettle, a bottom valve is provided outside the lower end of the chlorination kettle, the bottom valve is connected to the discharge valve, one end of the check valve is connected between the bottom valve and the discharge valve, and the other end of the check valve is connected to two inlet valves in series, a flow meter is provided between the two inlet valves, and a bypass valve is connected in parallel with the two inlet valves in series. However, the chlorine supply device of this patent still has the above-mentioned problems.

[0003] In summary, the existing chlorination kettle has the problems of long chlorine passing time, uneven contact between chlorine and materials in the kettle, and increased pressure in the kettle, which leads to incomplete reaction, reduced product performance, high chlorine content in tail gas, and increased alkali consumption in tail gas treatment. Utility Model Content

[0004] The technical problem to be solved by the utility model is: to overcome the deficiencies of the prior art and provide a chlorine-passing device for a chlorination kettle and a chlorination kettle, which can effectively solve the problem of over-concentrated chlorine distribution, increase the utilization rate of chlorine while accelerating the chlorine-passing speed, thereby improving product performance and reducing energy consumption.

[0005] The technical solution of the utility model is:

[0006] On the one hand, the utility model provides a chlorine supply device for a chlorination kettle, comprising a chlorine supply pipe, a chlorine inlet end of the chlorine supply pipe is provided with a flange, the other end is provided with an umbrella cap, and a plurality of chlorine outlets are provided circumferentially on the chlorine supply pipe; one end of the chlorine supply pipe provided with the umbrella cap extends into the chlorination kettle from the chlorination kettle discharge port, the umbrella cap is located below the stirring device of the chlorination kettle, the chlorine inlet end is detachably fixed at the discharge port and is connected to the discharge pipe of the chlorination kettle, and the discharge pipe is connected with the chlorine inlet pipe.

[0007] Preferably, the umbrella cap is threadedly connected to the chlorine pipe.

[0008] Preferably, the discharge pipe flange is connected to the discharge port of the chlorination kettle, and the flange of the chlorine-passing pipe is clamped between the discharge pipe and the flange of the discharge port of the chlorination kettle.

[0009] Preferably, three chlorine outlets are provided.

[0010] Preferably, three chlorine outlets are circumferentially arranged at equal intervals on the chlorine pipe.

[0011] Preferably, the chlorine-passing pipe, flange and umbrella cap are all made of polytetrafluoroethylene.

[0012] On the other hand, the utility model provides a chlorination kettle, and the chlorine-passing device for the chlorination kettle is installed at the discharge port of the chlorination kettle.

[0013] The chlorine-passing device of the utility model mainly solves the problem of concentrated chlorine passing through the chlorination kettle when producing CPE by the acid phase method. Of course, it is also applicable to other product processes involving chlorine gas reactions.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The chlorine-passing device of the utility model can make chlorine enter the chlorination kettle as evenly as possible, so as to fully react with the material, and can effectively solve the problem of over-concentrated chlorine distribution. While accelerating the chlorine-passing speed, it improves the utilization rate of chlorine, improves product performance and reduces energy consumption.

[0016] 2. When the capacity of each batch is 5.5t, when the chlorine is passed through the chlorine port at the bottom of the kettle, 3.5t of chlorine needs to be passed through the reaction, the chlorine passing speed is 1100kg / h, and the time is 3.2h; after adopting the chlorine passing device of the utility model, the chlorine passing speed is increased to 1300kg / h, the chlorine passing speed is increased by about 18%, the chlorine passing amount is reduced by 100kg, and the chlorine passing time is shortened by 30min. When the reaction temperature is 135℃, the kettle pressure is reduced from 0.45-0.48Mpa to 0.3-0.35Mpa, the chlorine reacts more evenly with the material, the product performance is improved, and the product elongation is increased from 650% to 800%. In the original chlorine-passing method, the chlorine overflow rate is 3‰, that is, about 10.5kg of chlorine overflows into the tail gas absorption device in each batch, and the consumption of 30% liquid alkali is 39.4kg; after adopting the chlorine-passing device of the utility model, the chlorine overflow rate is 2‰, about 7kg of chlorine overflows in each batch, and the consumption of 30% liquid alkali is 26.3kg, and 13.1kg of 30% liquid alkali is saved in each batch. Calculated based on an annual output of 40,000 tons, 727 tons of chlorine are saved each year, and about 95 tons of 30% liquid alkali are saved. Therefore, the use of the chlorine-passing device of the utility model can reduce the chlorine content in the tail gas, reduce the consumption of alkali for tail gas treatment, and thus reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is one of the structural schematic diagrams of the chlorine-passing device for the chlorination kettle of the utility model.

[0019] Figure 2 This is the second structural schematic diagram of the chlorine-passing device for the chlorination kettle of the utility model.

[0020] Figure 3 The utility model is a schematic diagram of installing a chlorine-passing device for a chlorination kettle on a chlorination kettle.

[0021] In the figure, 1, chlorine pipe; 2, flange; 3, umbrella cap; 4, chlorine outlet; 5, chlorination kettle; 501, discharge port; 6, discharge pipe; 7, chlorine inlet pipe. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0023] Example 1

[0024] like Figure 1-3 As shown, the present embodiment provides a chlorine-passing device for a chlorination kettle, including a chlorine-passing pipe 1, a flange 2 is provided at the chlorine inlet end of the chlorine-passing pipe 1, and an umbrella cap 3 is threadedly connected at the other end. Three chlorine outlets 4 are equidistantly arranged on the chlorine-passing pipe 1 in the circumferential direction, and the chlorine-passing pipe 1, the flange 2 and the umbrella cap 3 are all made of polytetrafluoroethylene. During installation, the umbrella cap 3 is first unscrewed, and the chlorine-passing pipe 1 is extended into the chlorination kettle 5 from the discharge port 501 of the chlorination kettle 5, and then the discharge pipe 6 of the chlorination kettle 5 is fixed at the discharge port 501 of the chlorination kettle 5 through a flange, and during the installation process, the flange 2 at the chlorine-passing pipe 1 is clamped between the two flanges. Subsequently, the staff enters the chlorination kettle 5 and screws the umbrella cap 3 on the chlorine-passing pipe 1, and the installation of the chlorine-passing device is completed.

[0025] After the installation is completed, the stirring device of the chlorination kettle 5 is located directly above the umbrella cap 3. Figure 3As shown, the discharge pipe 6 is connected to a chlorine inlet pipe 7. After the chlorine supply device of this embodiment is used, chlorine enters the chlorine supply pipe 1 through the discharge pipe 6 at the bottom of the kettle, and then enters the bottom of the kettle in different directions through three chlorine outlets 4. The umbrella cap 3 above will prevent the chlorine from flowing straight upward from the stirring shaft (where the stirring effect is weak) to the gas phase, so that the chlorine can fully follow the stirring rotation and tumble, and react evenly and fully with the material. When the chlorine supply device of this embodiment is used in practice, the diameter of the chlorine supply pipe 1 and the size of the chlorine outlet 4 can be appropriately adjusted according to the actual production capacity.

[0026] The utility model introduces a chlorine-passing device into the process flow, which can effectively solve the problem of over-concentrated chlorine distribution, and improves the utilization rate of chlorine while accelerating the chlorine-passing speed, thereby improving product performance and reducing energy consumption.

[0027] Example 2

[0028] On the basis of Example 1, Figure 3 As shown, this embodiment provides a chlorination kettle 5, the main structure of which can adopt the existing chlorination kettle 5 structure design, but the above-mentioned chlorination kettle chlorination device is installed at its discharge port 501 to allow chlorine to enter the chlorination kettle 5 as evenly as possible, so as to fully react with the material.

[0029] Although the present invention is described in detail by referring to the accompanying drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, a person skilled in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions shall be within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A chlorine supply device for a chlorination kettle, characterized in that: The chlorine-passing pipe (1) comprises a chlorine-passing pipe (1), wherein a flange (2) is provided at the chlorine-inlet end of the chlorine-passing pipe (1), and an umbrella cap (3) is provided at the other end. A plurality of chlorine outlets (4) are provided on the chlorine-passing pipe (1) in a circumferential direction. One end of the chlorine-passing pipe (1) provided with the umbrella cap (3) extends into the chlorination kettle (5) through a discharge port (501) of the chlorination kettle (5), and the umbrella cap (3) is located below a stirring device of the chlorination kettle (5). The chlorine-inlet end is detachably fixed at the discharge port (501) and is communicated with a discharge pipe (6) of the chlorination kettle (5), and a chlorine-inlet pipe (7) is connected to the discharge pipe (6).

2. The chlorine-passing device for a chlorination kettle as claimed in claim 1, characterized in that: The umbrella cap (3) is threadedly connected to the chlorine pipe (1).

3. The chlorine-passing device for a chlorination kettle as claimed in claim 1, characterized in that: The discharge pipe (6) is flange-connected to the discharge port (501) of the chlorination kettle (5), and the flange (2) of the chlorine-passing pipe (1) is clamped between the discharge pipe (6) and the flange of the discharge port (501) of the chlorination kettle (5).

4. The chlorine-passing device for a chlorination kettle as claimed in claim 1, characterized in that: The chlorine outlets (4) are provided with three.

5. The chlorine-passing device for a chlorination kettle as claimed in claim 4, characterized in that: Three chlorine outlets (4) are circumferentially arranged at equal intervals on the chlorine passage pipe (1).

6. The chlorine-passing device for a chlorination kettle as claimed in claim 1, characterized in that: The chlorine-passing pipe (1), flange (2) and umbrella cap (3) are all made of polytetrafluoroethylene.

7. Chlorination kettle, characterized in that, A chlorine supply device for a chlorination kettle as claimed in any one of claims 1 to 6 is installed at the discharge port (501) of the chlorination kettle (5).

Images