Rotary drum pretreatment device for dimethylacetamide solvent recovery

Abstract

The utility model discloses a dimethylacetamide solvent recovery drum pretreatment device which comprises a first vacuum filter, a first diatomite precoating tank, a first gas-liquid separator, a first drum delivery pump and a first bag filter, the first outlet end of the first vacuum filter is connected with the first inlet end of the first diatomite precoating tank, and the second outlet end of the first vacuum filter is connected with the first inlet end of the first gas-liquid separator; the first outlet end of the first gas-liquid separator is connected with the first inlet end of the first drum delivery pump, and the first outlet end of the first drum delivery pump is connected with the first inlet end of the first bag filter. The dimethylacetamide solvent recovery drum pretreatment device provided by the utility model has the beneficial effects that the structure is stable and reliable, the dimethylacetamide solvent can be recovered, drum pretreatment can be carried out, and the stability and continuity of the process are ensured.

Description

Technical Field

[0001] The utility model belongs to the field, and specifically relates to a pretreatment device for a rotary drum for recovering dimethylacetamide solvent. Background Technique

[0002] Dimethylacetamide (DMAc) is a colorless and transparent liquid, flammable, and can be arbitrarily mixed with organic solvents such as water, alcohol, ether, ester, benzene, chloroform, and aromatic compounds. Dimethylacetamide is a strongly polar aprotic solvent and is widely used in industries such as textiles, cosmetics, and membrane material preparation. According to statistics, the annual consumption of dimethylacetamide in China reaches tens of thousands of tons. However, there is still no suitable treatment method for the production wastewater containing dimethylacetamide. If the conventional biological treatment process is used, due to the toxic effect of dimethylacetamide, it will inhibit the microbial activity during the treatment process, causing the activated sludge to disintegrate and flow away, seriously affecting the treatment effect.

[0003] In the recovery and treatment of dimethylacetamide solvent, it is necessary to perform rotary drum pretreatment on it to ensure the recovery and treatment effect of dimethylacetamide solvent. Therefore, it is necessary to design a pretreatment device for a rotary drum for recovering dimethylacetamide solvent. Summary of the Invention

[0004] In order to solve the deficiencies existing in the prior art, the utility model provides a pretreatment device for a rotary drum for recovering dimethylacetamide solvent.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A pretreatment device for a rotary drum for recovering dimethylacetamide solvent includes a first vacuum filter, a first diatomaceous earth precoating tank, a first gas-liquid separator, a first rotary drum transfer pump, and a first bag filter. The first inlet end of the first vacuum filter is connected to a dimethylacetamide raw material tank. The first outlet end of the first vacuum filter is connected to the first inlet end of the first diatomaceous earth precoating tank. The second outlet end of the first vacuum filter is connected to the first inlet end of the first gas-liquid separator. The first outlet end of the first gas-liquid separator is connected to the first inlet end of the first rotary drum transfer pump. The first outlet end of the first rotary drum transfer pump is connected to the first inlet end of the first bag filter.

[0007] Further, the pretreatment device for a rotary drum for recovering dimethylacetamide solvent includes a second gas-liquid separator. The second outlet end of the first gas-liquid separator is electrically connected to the first inlet end of the second gas-liquid separator. The first outlet end of the second gas-liquid separator is connected to the first inlet end of the first rotary drum transfer pump.

[0008] Further, the pretreatment device for the dimethylacetamide solvent recovery drum includes a second drum transfer pump. The first inlet end of the second drum transfer pump is connected to the first outlet end of the first gas-liquid separator, and the first outlet end of the second drum transfer pump is connected to the first inlet end of the first bag filter.

[0009] Further, the pretreatment device for the dimethylacetamide solvent recovery drum includes a second bag filter. The first inlet end of the second bag filter is connected to the first outlet end of the second drum transfer pump.

[0010] Further, the pretreatment device for the dimethylacetamide solvent recovery drum includes a first diatomaceous earth transfer pump and a second diatomaceous earth transfer pump. The first inlet ends of the first diatomaceous earth transfer pump and the second diatomaceous earth transfer pump are both connected to the first outlet end of the first diatomaceous earth precoating tank, and the first outlet ends of the first diatomaceous earth transfer pump and the second diatomaceous earth transfer pump are both connected to the first inlet end of the first vacuum filter.

[0011] Compared with the prior art, the pretreatment device for the dimethylacetamide solvent recovery drum disclosed by the present utility model has the beneficial effect that its structure is stable and reliable, and it can perform drum pretreatment on the recovery of dimethylacetamide solvent to ensure the stability and continuity of the process. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic structural diagram of a preferred embodiment provided by the present utility model.

[0013] Figure 2 is a schematic structural diagram of the first gas-liquid separator of the preferred embodiment provided by the present utility model.

[0014] Figure 3 is a schematic structural diagram of the first vacuum filter of the preferred embodiment provided by the present utility model.

[0015] The reference numerals include: 1, first vacuum filter; 2, first diatomaceous earth precoating tank; 3, first gas-liquid separator; 4, second gas-liquid separator; 5, first drum transfer pump; 6, second drum transfer pump; 7, first bag filter; 8, second bag filter; 9, first diatomaceous earth transfer pump; 10, second diatomaceous earth transfer pump. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The present utility model discloses a pretreatment device for a dimethylacetamide solvent recovery drum. The following further describes the specific embodiments of the present utility model in conjunction with the preferred embodiments.

[0017] Referring to the drawings Figures 1-3 , Figure 1It is a schematic structural diagram of a preferred embodiment provided by the present utility model. Figure 2 It is a schematic structural diagram of the first gas-liquid separator 3 of a preferred embodiment provided by the present utility model. Figure 3 It is a schematic structural diagram of the first vacuum filter 1 of a preferred embodiment provided by the present utility model.

[0018] Preferred embodiment.

[0019] This embodiment provides a dimethylacetamide solvent recovery drum pretreatment device, including a first vacuum filter, a first diatomaceous earth precoating tank 2, a first gas-liquid separator 3, a first drum transfer pump 5 and a first bag filter 7. The first inlet end of the first vacuum filter 1 is connected to a dimethylacetamide raw material tank. The first outlet end of the first vacuum filter 1 is connected to the first inlet end of the first diatomaceous earth precoating tank 2. The second outlet end of the first vacuum filter 1 is connected to the first inlet end of the first gas-liquid separator 3. The first outlet end of the first gas-liquid separator 3 is connected to the first inlet end of the first drum transfer pump 5. The first outlet end of the first drum transfer pump 5 is connected to the first inlet end of the first bag filter.

[0020] Further, the dimethylacetamide solvent recovery drum pretreatment device includes a second gas-liquid separator 4. The second outlet end of the first gas-liquid separator 3 is electrically connected to the first inlet end of the second gas-liquid separator 4. The first outlet end of the second gas-liquid separator 4 is connected to the first inlet end of the first drum transfer pump 5.

[0021] Further, the dimethylacetamide solvent recovery drum pretreatment device includes a second drum transfer pump 6. The first inlet end of the second drum transfer pump 6 is connected to the first outlet end of the first gas-liquid separator 3. The first outlet end of the second drum transfer pump 6 is connected to the first inlet end of the first bag filter 7.

[0022] Further, the dimethylacetamide solvent recovery drum pretreatment device includes a second bag filter 8. The first inlet end of the second bag filter 8 is connected to the first outlet end of the second drum transfer pump 6.

[0023] Further, the dimethylacetamide solvent recovery drum pretreatment device includes a first diatomaceous earth transfer pump 9 and a second diatomaceous earth transfer pump 10. The first inlet ends of the first diatomaceous earth transfer pump 9 and the second diatomaceous earth transfer pump 10 are both connected to the first outlet end of the first diatomaceous earth precoating tank 2. The first outlet ends of the first diatomaceous earth transfer pump 9 and the second diatomaceous earth transfer pump 10 are both connected to the first inlet end of the first vacuum filter.

[0024] Working principle: The upper-stage kettle liquid enters the first vacuum filter 1. The dimethylacetamide solution is sent into the first vacuum filter 1 through the raw material tank or the refining tower. The liquid caustic soda is sent into the first vacuum filter 1 through a ton barrel. After being processed by the first vacuum filter 1, the diatomaceous earth and water enter the diatomaceous earth pre-coating tank. The first diatomaceous earth transfer pump 9 and the second diatomaceous earth transfer pump 10 can send it into the first vacuum filter 1 to ensure the filtering effect of the first vacuum filter 1. The first vacuum filter 1 is sent into the first gas-liquid separator 3 through the second outlet end. The gaseous substances enter the second gas-liquid separator 4, and the liquid substances enter the first bag filter 7 or the second bag filter 8 through the first drum transfer pump 5 or the second drum transfer pump 6, and thus enter the subsequent process.

[0025] It is worth mentioning that the technical features such as the transfer pump involved in the patent application of the present utility model should be regarded as the prior art. The specific structures, working principles, and possible control methods and spatial arrangement methods of these technical features can be selected conventionally in the art and should not be regarded as the inventive points of the patent of the present utility model. The patent of the present utility model will not be further specifically elaborated.

[0026] For those skilled in the art, it is still possible to modify the technical solutions recorded in the foregoing embodiments or make equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A dimethylacetamide solvent recovery drum pretreatment device, characterized in that: The invention comprises a first vacuum filter, a first diatomaceous earth pre-coating tank (2), a first gas-liquid separator (3), a first rotary drum conveying pump (5) and a first bag filter (7), wherein the first inlet end of the first vacuum filter (1) is connected to the dimethylacetamide raw material tank, the first outlet end of the first vacuum filter (1) is connected to the first inlet end of the first diatomaceous earth pre-coating tank (2), the second outlet end of the first vacuum filter (1) is connected to the first inlet end of the first gas-liquid separator (3), the first outlet end of the first gas-liquid separator (3) is connected to the first inlet end of the first rotary drum conveying pump (5), and the first outlet end of the first rotary drum conveying pump (5) is connected to the first inlet end of the first bag filter.

2. The dimethylacetamide solvent recovery drum pretreatment device according to claim 1, characterized in that: The dimethylacetamide solvent recovery drum pretreatment device comprises a second gas-liquid separator (4), the second outlet end of the first gas-liquid separator (3) is electrically connected to the first inlet end of the second gas-liquid separator (4), and the first outlet end of the second gas-liquid separator (4) is connected to the first inlet end of the first drum conveying pump (5).

3. The dimethylacetamide solvent recovery drum pretreatment device according to claim 2, characterized in that: The dimethylacetamide solvent recovery drum pretreatment device comprises a second drum delivery pump (6), a first inlet end of the second drum delivery pump (6) is connected to a first outlet end of the first gas-liquid separator (3), and a first outlet end of the second drum delivery pump (6) is connected to a first inlet end of the first bag filter (7).

4. The dimethylacetamide solvent recovery drum pretreatment device according to claim 3, characterized in that: The dimethylacetamide solvent recovery drum pretreatment device comprises a second bag filter (8), and a first inlet end of the second bag filter (8) is connected to a first outlet end of the second drum delivery pump (6).

5. The dimethylacetamide solvent recovery drum pretreatment device according to claim 4, characterized in that: The dimethylacetamide solvent recovery drum pretreatment device comprises a first diatomaceous earth delivery pump (9) and a second diatomaceous earth delivery pump (10), wherein a first inlet end of the first diatomaceous earth delivery pump (9) and a first inlet end of the second diatomaceous earth delivery pump (10) are both connected to a first outlet end of the first diatomaceous earth pre-coating tank (2), and a first outlet end of the first diatomaceous earth delivery pump (9) and a first outlet end of the second diatomaceous earth delivery pump (10) are both connected to a first inlet end of the first vacuum filter.

Images