Oximation reaction device
By using tert-butanol instead of demineralized water as the cooling and sealing medium for the reactor liquid circulation pump in the oxime reaction unit, the problem of large demineralized water consumption was solved, achieving energy saving, consumption reduction, and cost reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANXI LANHUA SCI TECH VENTURE
- Filing Date
- 2025-06-18
- Publication Date
- 2026-05-29
AI Technical Summary
Traditional oxime reaction systems require large amounts of demineralized water, leading to increased wastewater treatment burden and a sharp increase in distillation column load, thus increasing production costs.
Tert-butanol is used as the cooling, sealing, and lubricating medium for the reactor liquid circulation pump, replacing the traditional demineralized water. The tert-butanol is used to flush the mechanical seal cavity via a booster pump, reducing the amount of demineralized water used.
It effectively reduces the amount of demineralized water used, decreases wastewater treatment pressure and distillation tower steam consumption, achieves energy conservation and consumption reduction, lowers production costs, and improves production efficiency.
Smart Images
Figure CN224293255U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of oxime reaction equipment, and more particularly to an oxime reaction apparatus. Background Technology
[0002] Traditionally, demineralized water is added to the mechanical seal of the reactor liquid circulation pump via a booster pump and then enters the oxime reaction system. In general, chemical plants add 1.2 tons of demineralized water per hour to the mechanical seal of a single pump. This ensures that the mechanical seal of the reactor liquid circulation pump receives sufficient cooling, sealing, and lubrication, thereby extending the service life of the mechanical seal and ensuring long-term stable production of the oxime reaction system.
[0003] The mechanical seal demineralized water added by a single pump in the oxime reaction system is 1.2 tons / hour. Once all of this demineralized water enters the system, it will result in a large consumption of demineralized water, thereby increasing the burden on wastewater treatment. At the same time, the load on each distillation column will also increase sharply. Utility Model Content
[0004] To address the problem of large quantities of demineralized water used, this invention provides an oxime reaction device.
[0005] This utility model is achieved through the following technical solution: an oxime reaction device, including a reactor and at least one reactor liquid feed circulation pipeline; the reactor liquid feed circulation pipeline includes a feed pipe connected to the upper part of the reactor and a reactor liquid circulation pump connected to the lower part of the reactor. Hydrogen peroxide feed pipe, ammonia feed pipe, cyclohexanone feed pipe, and tert-butanol feed pipe are connected in parallel on the feed pipe. The other end of the feed pipe is connected to the tube-side outlet of a cooler. The tube-side inlet of the cooler is connected to the outlet of the reactor liquid circulation pump via a pipeline. A membrane filter is installed on the pipeline between the reactor liquid circulation pump and the cooler. The mechanical seal chamber of the reactor liquid circulation pump on each reactor liquid feed circulation pipeline is connected to the outlet of a tert-butanol booster pump via a corresponding flushing pipeline. The inlet of the tert-butanol booster pump is connected to a tert-butanol raw material source.
[0006] As a further improvement to the technical solution of this utility model, the tert-butanol raw material source is a tert-butanol tank.
[0007] As a further improvement to the technical solution of this utility model, a pressure gauge and a flow meter are installed on the flushing pipeline.
[0008] As a further improvement to the technical solution of this utility model, the outlet of the tert-butanol booster pump is connected to the tert-butanol feed pipe through a branch pipeline.
[0009] As a further improvement to the technical solution of this utility model, at least one feed mixer is provided on the feed pipe.
[0010] As a further improvement to the technical solution of this utility model, at least one gate valve is provided on the pipeline between the tert-butanol booster pump and the flushing pipeline.
[0011] The oxime reaction apparatus provided by this invention has the following advantages compared with the prior art:
[0012] The oxime reaction device described in this invention is safe and reliable in operation, simple and convenient to use, and can effectively reduce the amount of demineralized water used in the chemical industry, improve water saving rate, and alleviate the problems of high wastewater treatment pressure and high steam consumption in distillation columns. This achieves the goals of reducing steam consumption, reducing carbon emissions, and saving energy, thereby lowering production costs and significantly improving production efficiency. It provides an efficient and reliable solution for the petrochemical industry, helping enterprises achieve their goals of energy conservation, emission reduction, cost reduction, and efficiency improvement. Attached Figure Description
[0013] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.
[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0015] Figure 1 This diagram shows the connection of the oxime reaction apparatus described in this invention.
[0016] In the diagram: 1-Reaction vessel, 2-Reaction vessel circulation pump, 3-Cooler, 4-Feed pipe, 5-Hydrogen peroxide feed pipe, 6-Ammonia gaseous feed pipe, 7-Cyclohexanone feed pipe, 8-T-Butanol feed pipe, 9-Flushing line, 10-T-Butanol booster pump, 11-T-Butanol tank, 12-Pressure gauge, 13-Flow meter, 14-Branch line, 15-Membrane filter, 16-Feed mixer, 17-Gate valve. Detailed Implementation
[0017] To better understand the above-mentioned objectives, features, and advantages of this utility model, the solution of this utility model will be further described below. It should be noted that, unless otherwise specified, the embodiments of this utility model and the features thereof can be combined with each other.
[0018] In this description, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. It should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joint" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.
[0019] Many specific details are set forth in the following description in order to provide a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the present invention, and not all embodiments.
[0020] The specific embodiments of this utility model will be described in detail below.
[0021] like Figure 1 As shown, this utility model provides a specific embodiment of an oxime reaction apparatus, including a reactor 1 and two reactor liquid feed circulation pipelines; the reactor liquid feed circulation pipelines include a feed pipe 4 connected to the upper part of the reactor 1 and a reactor liquid circulation pump 2 connected to the lower part of the reactor 1. Hydrogen peroxide feed pipe 5, ammonia feed pipe 6, cyclohexanone feed pipe 7, and tert-butanol feed pipe 8 are connected in parallel to the feed pipe 4. The other end of the feed pipe 4 is connected to the tube-side outlet of a cooler 3. The tube-side inlet of the cooler 3 is connected to the outlet of the reactor liquid circulation pump 2 via a pipeline. A membrane filter 15 is installed on the pipeline between the reactor liquid circulation pump 2 and the cooler 3. The mechanical seal chamber of the reactor liquid circulation pump 2 on each reactor liquid feed circulation pipeline is connected to the outlet of a tert-butanol booster pump 10 via a corresponding flushing pipeline 9. The inlet of the tert-butanol booster pump 10 is connected to a tert-butanol raw material source.
[0022] In this embodiment, the cooler 3 can be a shell-and-tube cooler. The reactor liquid circulation pump 2 is a mechanical seal internal flushing pump, specifically a chemical process pump purchased from Hangzhou Alkali Pump Co., Ltd., model TP350-300-450-PK. In this mechanical seal internal flushing pump, the flushing medium enters the mechanical seal cavity and then enters the impeller of the pump body, from where it is pumped into the reactor 1 by the reactor liquid circulation pump 2.
[0023] Specifically, the tert-butanol feedstock source is the tert-butanol tank 11. In this embodiment, the tert-butanol feedstock source for the tert-butanol feed pipe 8 is also the tert-butanol tank 11.
[0024] The original demineralized water booster pump had an outlet pressure of about 0.7 MPa (rated pressure 0.75 MPa). In this embodiment, the mechanical seal flushing medium was changed. If the oxime reaction system is to operate stably, the outlet pressure of the tert-butanol booster pump 10 during normal production is set at about 0.8 MPa (rated pressure 1 MPa). After the pipeline configuration was completed, the inventors changed the mechanical seal cooling demineralized water to tert-butanol on August 24, 2023. Since its commissioning, the system has been operating stably.
[0025] To facilitate dynamic monitoring of the pressure and flow rate on the flushing pipeline 9, a pressure gauge 12 and a flow meter 13 are installed on the flushing pipeline 9.
[0026] When the tert-butanol feedstock of the tert-butanol feed pipe 8 is also the tert-butanol tank 11, the outlet of the tert-butanol booster pump 10 is connected to the tert-butanol feed pipe 8 through a branch line 14.
[0027] To effectively mix the materials entering the reactor 1, two feed mixers 16 are installed on the feed pipe 4. For example... Figure 1 As shown, one feed mixer 16 is located between hydrogen peroxide feed pipe 5 and reactor 1, and the other feed mixer 16 is located between hydrogen peroxide feed pipe 5 and ammonia feed pipe 6.
[0028] like Figure 1 As shown, at least one gate valve 17 is installed on the pipeline between the tert-butanol booster pump 10 and the flushing pipeline 9. The flow rate of the mechanical seal water in the mechanical seal chamber of the reactor liquid circulation pump 2 can be adjusted according to the actual situation of the oxime reaction system.
[0029] The specific usage process of this embodiment is as follows:
[0030] Open the valves on hydrogen peroxide feed pipe 5, ammonia feed pipe 6, cyclohexanone feed pipe 7, and tert-butanol feed pipe 8. Turn on tert-butanol booster pump 10. The tert-butanol in tert-butanol tank 11 is delivered to tert-butanol feed pipe 8 and multiple flushing lines 9 by tert-butanol booster pump 10. The tert-butanol in flushing line 9 is used as the cooling flushing medium of reactor liquid circulation pump 2 and enters the mechanical seal chamber of the corresponding reactor liquid circulation pump 2. Then it enters the reactor liquid feed circulation line through the outlet of reactor liquid circulation pump 2.
[0031] Hydrogen peroxide feed pipe 5, ammonia feed pipe 6, cyclohexanone feed pipe 7, and tert-butanol feed pipe 8 respectively inject hydrogen peroxide, ammonia, cyclohexanone, and tert-butanol into reactor 1, where they are mixed and reacted. The mixture then enters membrane filter 15 through the inlet and outlet of reactor liquid circulation pump 2. After filtration by membrane filter 15, the turbid liquid enters cooler 3 for cooling, and then mixes again with the hydrogen peroxide, ammonia, cyclohexanone, and tert-butanol from hydrogen peroxide feed pipe 5, ammonia feed pipe 6, cyclohexanone feed pipe 7, and tert-butanol feed pipe 8. The mixture then enters reactor 1 through feed mixer 16. The clear liquid from membrane filter 15 enters the next step of the oxime reaction.
[0032] In this embodiment, tert-butanol is used as the solvent for the oxime reaction and also as the cooling and flushing medium for the reactor liquid circulation pump 2, for cooling, sealing, and lubrication, thus achieving energy saving and consumption reduction. After the implementation of this utility model, it is calculated that approximately 2.4 t / h of demineralized water is saved, resulting in a monthly saving of 15,552 yuan (calculated at 9 yuan per ton of demineralized water, 2.4 t × 24 h × 30 days × 9 yuan = 15,552 yuan); and an annual saving of 186,600 yuan.
[0033] At the same time, this embodiment reduces the system's wastewater treatment volume by 2.4t / h, lowers the sewage treatment capacity, and saves 15,552 yuan per month (the cost of treating 1 ton of normal standard wastewater is about 9 yuan, so 2.4t × 24h × 30 days × 9 yuan = 15,552 yuan); and saves 186,600 yuan in sewage treatment costs per year.
[0034] The 2.4t / h demineralized water entering the system via the mechanical seal needs to pass through an alcohol tower and a wastewater steam tower to evaporate organic matter before being sent to the sewage treatment plant. It is estimated that the steam consumption is about 1.5t / h. After the change, the monthly savings will be RMB 151,200 (calculated at RMB 140 per ton of steam, 1.5t × 24h × 30 days × RMB 140 = RMB 151,200); the annual savings will be RMB 1,814,400.
[0035] This results in annual savings of 2.1876 million yuan.
[0036] The above description is merely a specific embodiment of this utility model, enabling those skilled in the art to understand or implement it. Although detailed descriptions have been provided with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments, and all should be covered by the protection scope of the claims.
Claims
1. An oxime reaction apparatus, comprising a reaction vessel (1) and at least one vessel liquid feed circulation pipeline; characterized in that, The reactor liquid feed circulation pipeline includes a feed pipe (4) connected to the upper part of the reactor (1) and a reactor liquid circulation pump (2) connected to the lower part of the reactor (1). The feed pipe (4) is connected in parallel with a hydrogen peroxide feed pipe (5), ammonia feed pipe (6), cyclohexanone feed pipe (7), and tert-butanol feed pipe (8). The other end of the feed pipe (4) is connected to the tube side outlet of the cooler (3). The tube side inlet of the cooler (3) is connected to the outlet of the reactor liquid circulation pump (2) through a pipeline. A membrane filter (15) is installed on the pipeline between the reactor liquid circulation pump (2) and the cooler (3). The mechanical seal chamber of the reactor liquid circulation pump (2) on each reactor liquid feed circulation pipeline is connected to the outlet of the tert-butanol booster pump (10) through a corresponding flushing pipeline (9). The inlet of the tert-butanol booster pump (10) is connected to the tert-butanol raw material source.
2. The oxime reaction apparatus according to claim 1, characterized in that, The tert-butanol feedstock is a tert-butanol tank (11).
3. The oxime reaction apparatus according to claim 1 or 2, characterized in that, A pressure gauge (12) and a flow meter (13) are installed on the flushing pipeline (9).
4. The oxime reaction apparatus according to claim 1 or 2, characterized in that, The outlet of the tert-butanol booster pump (10) is connected to the tert-butanol feed pipe (8) via a branch line (14).
5. The oxime reaction apparatus according to claim 1 or 2, characterized in that, At least one feed mixer (16) is provided on the feed pipe (4).
6. The oxime reaction apparatus according to claim 1 or 2, characterized in that, At least one gate valve (17) is installed on the pipeline between the tert-butanol booster pump (10) and the flushing pipeline (9).