System for treating impurities in materials and wastewater of dibutyl phthalate device
By designing a treatment system for impurities in materials and wastewater used in dealcohol and neutralization kettles, the problem of impurities affecting production interruptions is solved, and the goal of product quality improvement and environmental protection is achieved.
Patent Information
- Application Number
- CN202420761545.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-12
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-04-12
AI Technical Summary
When production resumes after production is interrupted, there are many liquid impurities in the dealcoholing kettle and neutralizing kettle, which affects the subsequent production process, resulting in a decline in product quality or brings huge pressure to subsequent processes.
A treatment system for materials and impurities in wastewater including dealcohol and neutralizing kettle is designed. Coarse and fine filtering are carried out through a filter to remove impurities, and gas-liquid separation is performed through a blow-drying tank to ensure the cleaning of materials and wastewater.
It effectively removes impurities in the dealcohol and neutralizes the liquid in the kettle, improves product quality, reduces the pressure on subsequent processes, and realizes precise filtration of wastewater and recycling of water resources.
Smart Images
Figure CN222665627U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of dibutyl phthalate production, and in particular relates to a system for processing impurities in materials and wastewater of a dibutyl phthalate device. Background Art
[0002] The production process of synthesizing dibutyl phthalate (DBP for short) is a typical esterification reaction, and the reaction principle is: phthalic anhydride and butanol are heated to 120-150°C under the action of concentrated sulfuric acid in an esterification kettle to generate dibutyl phthalate and water. The production process of dibutyl phthalate (hereinafter referred to as crude ester) is divided into esterification, neutralization washing, stripping and filtration, wherein the scum, saponification and other impurities produced by the reaction in the crude ester in the dealcoholization kettle of the esterification step and the ester-water mixture in the neutralization kettle of the neutralization washing step are mixed in the product and are difficult to remove. After the production is interrupted and the production is resumed, there are more liquid impurities in the dealcoholization kettle and the neutralization kettle, which affects the subsequent production process, thereby causing the product quality to decline, or bringing huge pressure to the subsequent process. Utility Model Content
[0003] The utility model provides a system for processing impurities in materials and wastewater of a dibutyl phthalate device in order to solve the problem that, when resuming production after production interruption, there are many liquid impurities in the dealcoholization kettle and the neutralization kettle, which affects the subsequent production process, thereby causing a decrease in product quality or bringing great pressure to subsequent processes.
[0004] In order to solve the above problems, the technical solution of the utility model is:
[0005] The utility model discloses a system for treating impurities in materials and wastewater of a dibutyl phthalate device, comprising a dealcoholization kettle and a neutralization kettle, wherein the bottom of the dealcoholization kettle is connected to the bottom of a filter through a dealcoholization ester output pipeline, the top discharge port of the filter is connected to an ester circulation reflux pipeline through a dealcoholization ester reflux pipeline, and is connected to a top inlet of the dealcoholization kettle through an ester circulation reflux pipeline, the bottom of the dealcoholization kettle is connected to a blow-drying tank through a residual liquid pipeline, the top of the blow-drying tank is connected to a vacuum tail gas absorption tank, the bottom is connected to the top inlet of the dealcoholization kettle through a blow-drying condensate pipeline, the top of the filter is connected to an industrial air pipeline, the bottom of the neutralization kettle is connected to the bottom of the filter through a neutralization wastewater pipeline, a water reflux pipeline and an ester switching pipeline are arranged at the middle discharge port of the filter, the water reflux pipeline is connected to the top inlet of the neutralization kettle, and the ester switching pipeline is connected to the ester circulation reflux pipeline.
[0006] Furthermore, a delivery pump and a display tank are provided on the water return pipeline.
[0007] Furthermore, a long window is provided on the side wall of the display tank.
[0008] Furthermore, a water reflux valve is provided on the water reflux pipeline.
[0009] Furthermore, a wastewater pump is provided on the neutralization wastewater pipeline, and a filter pump is provided on the dealcoholization ester output pipeline.
[0010] Furthermore, an ester switching valve is provided on the ester switching pipeline, a dealcoholized ester reflux valve is provided on the dealcoholized ester reflux pipeline, and an industrial air valve is provided on the industrial air pipeline.
[0011] Working principle:
[0012] Formation of filter cake in the filter and replacement of diatomaceous earth: The crude ester in the dealcoholization kettle is pumped from the dealcoholization ester output pipeline to the bottom inlet of the diatomaceous earth filter through the filter pump for coarse filtration. The coarsely filtered liquid is transported to the top inlet of the dealcoholization kettle through the dealcoholization ester reflux pipeline and ester circulation reflux pipeline at the top of the filter. After a period of cyclic coarse filtration, the material in the diatomaceous earth filter is fully and evenly mixed with the diatomaceous earth. When the material is clear and transparent from the sight glass at the filter outlet, it means that the cycle of forming a uniform filter cake in the diatomaceous earth filter is completed. At this time, close the dealcoholization ester reflux valve. After using it for a period of time, monitor the working pressure of the diatomaceous earth filter through the filter pressure gauge. When the working pressure exceeds the upper limit of the normal range, stop the coarse filtration and clean the diatomaceous earth filter, replace new diatomaceous earth, and repeat the filter to form a filter cake cycle to ensure the coarse filtration effect next time.
[0013] Filtration of crude ester after dealcoholization in the dealcoholization kettle: The crude ester after dealcoholization in the dealcoholization kettle is pumped from the dealcoholization ester output pipeline to the bottom inlet of the filter through a filter pump for coarse filtration. The pigments and visible impurities in the crude ester are filtered out by the filter, and then transported to the top inlet of the dealcoholization kettle through the dealcoholization ester reflux pipeline and the ester circulation reflux pipeline at the top of the filter for return and circulation filtration. After the filtration is completed, close the dealcoholization ester reflux valve on the dealcoholization ester reflux pipeline, open the industrial air valve on the industrial air pipeline, and blow the residual crude ester in the filter into the drying tank through the residual liquid pipeline for gas-liquid separation. The condensate at the bottom of the drying tank is sent to the dealcoholization kettle through the drying condensate pipeline, and the dried tail gas at the top of the drying tank is sent to the vacuum tail gas absorption tank through the drying tail gas pipeline.
[0014] Filtration of impurities in the wastewater of the neutralization kettle: open the water reflux valve, and the wastewater from the neutralization kettle (containing a small amount of crude ester, etc.) is transported to the filter through the neutralization wastewater pipeline through the wastewater pump. After the impurities in the wastewater are filtered out by the filter, it is transported to the neutralization kettle through the water reflux pipeline through the delivery pump; observe the long window of the display tank on the water reflux pipeline, and when the wastewater is stratified, close the water reflux valve and stop draining water to the neutralization kettle. At this time, the wastewater contains more crude esters. Open the ester switching valve on the ester switching pipeline, and discharge the wastewater containing crude esters to the dealcoholization kettle through the ester switching pipeline and the ester circulation reflux pipeline. After the filtration is completed, open the industrial air valve on the industrial air pipeline, and blow the residual crude ester in the filter into the drying tank through the residual liquid pipeline for gas-liquid separation. The condensate at the bottom of the drying tank is sent to the dealcoholization kettle through the drying condensate pipeline, and the drying tail gas at the top of the drying tank is sent to the vacuum tail gas absorption tank through the drying tail gas pipeline.
[0015] After completing the filtration process, you can start the machine and continue production.
[0016] The beneficial effects of the utility model are as follows:
[0017] 1) The utility model has a simple process and is easy to operate. It removes most of the impurities in the liquid in the dealcoholization kettle and the neutralization kettle, improves the quality of the product, and reduces the problems caused to the subsequent processes after resuming production.
[0018] 2) The device of the utility model can reduce the generation of waste by filtering materials, thus meeting environmental protection requirements.
[0019] 3) After the device of the utility model effectively removes impurities in the wastewater, the water resources can be recycled, saving costs and meeting the requirements of energy saving and consumption reduction.
[0020] 4) The device of the utility model can efficiently adsorb and filter pollutants, saponification products, etc. in wastewater, so that the wastewater can be accurately filtered. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:
[0022] Figure 1 It is a schematic diagram of the structure of the system for treating impurities in the material and wastewater of the dibutyl phthalate device of the utility model;
[0023] In the figure: 1. dealcoholization kettle; 2. filter pump; 3. filter; 4. blow-drying tank; 5. vacuum tail gas absorption tank; 6. neutralization kettle; 7. wastewater pump; 8. delivery pump; 9. display tank; 901, window; 10. industrial air pipeline; 1001, industrial air valve; 11. dealcoholized ester reflux pipeline; 1101, dealcoholized ester reflux valve; 12. dealcoholized ester output pipeline; 13. ester circulation reflux pipeline; 14. residual liquid pipeline; 15. blow-drying condensate pipeline; 16. neutralization wastewater pipeline; 17. water reflux pipeline; 1701, water reflux valve; 18. ester switching pipeline; 1801, ester switching valve. DETAILED DESCRIPTION
[0024] The present invention will be described in detail below in conjunction with the embodiments.
[0025] In one embodiment, Figure 1 As shown, a system for treating impurities in materials and wastewater of a dibutyl phthalate device comprises a dealcoholization kettle 1 and a neutralization kettle 6, wherein the bottom of the dealcoholization kettle 1 is connected to the bottom of a filter 3 through a dealcoholization ester output pipeline 12, the top discharge port of the filter 3 is connected to an ester circulation reflux pipeline 13 through a dealcoholization ester reflux pipeline 11, and is connected to the top inlet of the dealcoholization kettle 1 through the ester circulation reflux pipeline 13, the bottom of the dealcoholization kettle 1 is connected to a blow-drying tank 4 through a residual liquid pipeline 14, the top of the blow-drying tank 4 is connected to a vacuum tail gas absorption tank 5, the bottom is connected to the top inlet of the dealcoholization kettle 1 through a blow-drying condensate pipeline 15, the top of the filter 3 is connected to an industrial air pipeline 10, the bottom of the neutralization kettle 6 is connected to the bottom of the filter 3 through a neutralization wastewater pipeline 16, the middle discharge port of the filter 3 is provided with a water reflux pipeline 17 and an ester switching pipeline 18, the water reflux pipeline 17 is connected to the top inlet of the neutralization kettle 6, and the ester switching pipeline 18 is connected to the ester circulation reflux pipeline 13.
[0026] It can be understood that the water return pipeline 17 is provided with a delivery pump 8 and a display tank 9 .
[0027] It can be understood that a long window 901 is provided on the side wall of the display tank 9 .
[0028] It can be understood that a water reflux valve 1701 is provided on the water reflux pipeline 17 .
[0029] It can be understood that the neutralization wastewater pipeline 16 is provided with a wastewater pump 7 , and the dealcoholization ester output pipeline 12 is provided with a filter pump 2 .
[0030] It can be understood that the ester switching pipeline 18 is provided with an ester switching valve 1801 , the dealcoholized ester reflux pipeline 11 is provided with a dealcoholized ester reflux valve 1101 , and the industrial air pipeline 10 is provided with an industrial air valve 1001 .
[0031] Working principle:
[0032] Formation of filter cake in filter and replacement of diatomite: The crude ester in the dealcoholization kettle 1 is pumped from the dealcoholization ester output pipeline 12 to the bottom entrance of the diatomite filter 3 through the filter pump 2 for coarse filtration. The coarsely filtered liquid is transported to the top entrance of the dealcoholization kettle 1 through the dealcoholization ester reflux pipeline 11 and the ester circulation reflux pipeline 13 at the top of the filter 3. After a period of cyclic coarse filtration, the material in the diatomite filter 3 is fully and evenly mixed with the diatomite. After the material is clear and transparent from the sight glass at the outlet of the filter 3, it indicates that the cycle of forming a uniform filter cake in the diatomite filter 3 is completed. At this time, the dealcoholization ester reflux valve 1101 is closed. After a period of use, the working pressure of the diatomite filter 3 is monitored by the pressure gauge of the filter 3. When the working pressure exceeds the upper limit of the normal range, the coarse filtration is stopped and the diatomite filter 3 is cleaned, and new diatomite is replaced. The cycle operation of forming a filter cake by the filter 3 is repeated to ensure the coarse filtration effect next time.
[0033] Filtration of crude ester after dealcoholization in the dealcoholization kettle 1: The crude ester after dealcoholization in the dealcoholization kettle 1 is pumped from the dealcoholization ester output pipeline 12 to the bottom inlet of the filter 3 through the filter pump 2 for coarse filtration, and the pigment and visible impurities in the crude ester are filtered out through the filter 3, and transported to the top inlet of the dealcoholization kettle 1 through the dealcoholization ester reflux pipeline 11 and the ester circulation reflux pipeline 13 at the top of the filter 3, and returned for cyclic filtration. After the filtration is completed, the dealcoholization ester reflux valve 1101 on the dealcoholization ester reflux pipeline 11 is closed, and the industrial air valve 1001 on the industrial air pipeline 10 is opened, and the residual crude ester in the filter 3 is blown into the drying tank 4 through the residual liquid pipeline 14 for gas-liquid separation. The condensate at the bottom of the drying tank 4 is removed to the dealcoholization kettle 1 through the drying condensate pipeline 15, and the dried tail gas at the top of the drying tank 4 is removed to the vacuum tail gas absorption tank 5 through the drying tail gas pipeline.
[0034] Filtration of impurities in the wastewater of the neutralization kettle 6: Open the water reflux valve 1701, and the wastewater (containing a small amount of crude ester, etc.) from the neutralization kettle 6 is transported to the filter 3 through the neutralization wastewater pipeline 16 via the wastewater pump 7. After the impurities in the wastewater are filtered out by the filter 3, it is transported to the neutralization kettle 6 through the water reflux pipeline 17 via the delivery pump 8; observe the long window 901 of the display tank 9 on the water reflux pipeline 17, and when the wastewater is stratified, close the water reflux valve 1701 and stop draining water to the neutralization kettle 6. At this time, the wastewater contains more crude esters, open the ester switching valve 1801 on the ester switching pipeline 18, and discharge the wastewater containing crude esters to the dealcoholization kettle 1 through the ester switching pipeline 18 and the ester circulation reflux pipeline 13. After the filtration is completed, open the industrial air valve 1001 on the industrial air pipeline 10, and blow the residual crude ester in the filter 3 into the drying tank 4 through the residual liquid pipeline 14 to separate the gas and liquid. The condensate at the bottom of the drying tank 4 is sent to the dealcoholization kettle 1 through the drying condensate pipeline 15, and the dried tail gas at the top of the drying tank 4 is sent to the vacuum tail gas absorption tank 5 through the drying tail gas pipeline.
[0035] After completing the filtration process, you can start the machine and continue production.
[0036] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.
[0037] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.
Claims
1. A system for treating impurities in materials and wastewater of a dibutyl phthalate device, comprising a dealcoholization kettle (1) and a neutralization kettle (6), characterized in that: The bottom of the dealcoholization kettle (1) is connected to the bottom of the filter (3) via a dealcoholization ester output pipeline (12); the top discharge port of the filter (3) is connected to the ester circulation reflux pipeline (13) via a dealcoholization ester reflux pipeline (11); the top inlet of the dealcoholization kettle (1) is connected to the top inlet of the dealcoholization kettle (1) via the ester circulation reflux pipeline (13); the bottom of the dealcoholization kettle (1) is connected to the blow-drying tank (4) via a residual liquid pipeline (14); the top of the blow-drying tank (4) is connected to the vacuum tail gas absorption tank (5); the bottom is connected to the blow-drying tank (4) via a residual liquid pipeline (14); The condensate pipeline (15) is connected to the top inlet of the dealcoholization kettle (1); the top of the filter (3) is connected to the industrial air pipeline (10); the bottom of the neutralization kettle (6) is connected to the bottom of the filter (3) through the neutralization wastewater pipeline (16); a water reflux pipeline (17) and an ester switching pipeline (18) are provided at the middle discharge port of the filter (3); the water reflux pipeline (17) is connected to the top inlet of the neutralization kettle (6); and the ester switching pipeline (18) is connected to the ester circulation reflux pipeline (13).
2. The system for treating impurities in materials and wastewater of a dibutyl phthalate device according to claim 1, characterized in that: The water return pipeline (17) is provided with a delivery pump (8) and a display tank (9).
3. The system for treating impurities in materials and wastewater of a dibutyl phthalate device according to claim 2, characterized in that: The side wall of the display tank (9) is provided with a long window (901).
4. The system for treating impurities in materials and wastewater of a dibutyl phthalate device according to claim 3, characterized in that: The water return pipeline (17) is provided with a water return valve (1701).
5. The system for treating impurities in materials and wastewater of a dibutyl phthalate device according to claim 1, characterized in that: The neutralization wastewater pipeline (16) is provided with a wastewater pump (7), and the dealcoholized ester output pipeline (12) is provided with a filtration pump (2).
6. The system for treating impurities in materials and wastewater of a dibutyl phthalate device according to claim 1, characterized in that: The ester switching pipeline (18) is provided with an ester switching valve (1801), the dealcoholized ester reflux pipeline (11) is provided with a dealcoholized ester reflux valve (1101), and the industrial air pipeline (10) is provided with an industrial air valve (1001).