BDO production system
By introducing a fluidized bed reactor, filtration unit, and backwashing unit into the BDO production system, catalyst recovery and recycling were achieved, solving the catalyst clogging problem, improving the yield of BDO and the efficiency of catalyst use, and reducing production costs.
Patent Information
- Application Number
- CN202423035312.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-12-10
AI Technical Summary
In the existing BDO production process, the catalyst can easily enter downstream pipelines and equipment, causing equipment blockage, affecting normal production, and the catalyst utilization efficiency is low, reducing the yield.
The system employs a fluidized bed reactor, filtration unit, and backwashing unit. It filters the material using filter cartridges and high-precision filtration devices, recovers and recycles the catalyst, and includes catalyst recovery pipelines and solid-liquid separation devices to prevent filter media clogging. The backwashing unit cleans the filter cartridges.
This improved the yield of BDO and the efficiency of catalyst use, reduced production costs, and ensured the long-term stable operation of the filtration system.
Smart Images
Figure CN223517491U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to 1, 4 - butanediol preparation technical field, specifically related to a BDO production system. BACKGROUND
[0002] 1, 4 - butanediol (English name is 1, 4 - butanediol, is abbreviated as BDO) as an important organic and fine chemical raw material is widely used. Its derivative is the fine chemical product with high added value, and is widely used in solvent, medicine, foam artificial leather, fiber, engineering plastic, cosmetics, plasticizer, curing agent, pesticide, herbicide and other fields. The early 1, 4 - butanediol product is used to prepare synthetic rubber monomer butadiene, and then butadiene has more economical source. Now 1, 4 - butanediol is mainly used to manufacture tetrahydrofuran (THF), polytetrahydrofuran (PTMEG), gamma - butyrolactone (GBL), PBT, PBAT, PU artificial leather, N - methyl pyrrolidone (NMP) and the like.
[0003] BDO downstream product PTMEG, PBAT / PBS, GBL corresponds to spandex, degradable material, lithium battery material three big in 2021 exceptionally hot market. At present, the demand of degradable plastic PBAT is about to enter the outbreak period, thereby driving the rapid growth of future demand of BDO, and the rapid rise of new energy field (new energy vehicle, photovoltaic) drives the explosive growth of demand of lithium battery, and BDO downstream GBL - NMP industry chain can be applied to lithium battery field, and will also rapidly grow in the future, drive the rapid growth of demand of BDO. The spandex field is still the main contribution point of BDO - THF - PTMEG industry chain demand, and the future demand is expected to maintain steady growth.
[0004] But in the prior art, because the catalyst is used to produce BDO, part of the catalyst is inevitably taken into the downstream pipeline and equipment during production, which causes equipment blockage and affects normal production, not only consumes catalyst, but also seriously reduces the yield of BDO, so an BDO production system with high yield, high catalyst utilization rate and low investment is urgently needed. UTILITY MODEL CONTENT
[0005] In view of the problems of low BDO yield and catalyst consumption, the utility model provides a kind of BDO production system, including fluidized reactor, filter unit and backwashing unit, formaldehyde, catalyst and pressurized acetylene gas are reacted in fluidized reactor, reaction slurry is filtered first after passing through filter core in fluidized reactor, then high-precision filtration is carried out by high-precision filter device, and finally high-purity BDO product is obtained, in early stage of system operation, the thick slurry containing catalyst is returned to fluidized reactor by catalyst recovery pipeline, and participates in the reaction of methanol and acetylene again, and catalyst reaches service life in later stage of operation, and solid-liquid separation is carried out by solid-liquid separation device, to obtain recycled slurry as recycled BYD product to carry out high-precision filtration again, waste catalyst is discharged from system, and catalyst can be recycled, backwashing unit uses filtered clear liquid to backwash filter core and high-precision filter device, effectively prevents filter material blockage, and improves filtration treatment effect.
[0006] In order to achieve the above object, the utility model adopts the following technical scheme:
[0007] A kind of BDO production system, comprising: fluidized reactor, filter unit, filter circulating tank and backwashing unit;The fluidized reactor is used for formaldehyde, catalyst and pressurized acetylene gas to react;The filter unit includes: filter core and high-precision filter device, the filter core is arranged in the fluidized reactor, for filtering reaction slurry;The high-precision filter device is connected with the clear liquid outlet of the fluidized reactor, for high-precision filtration to reaction clear liquid discharged in the fluidized reactor;The filter circulating tank is arranged between the fluidized reactor and the high-precision filter device, and the filter circulating tank is equipped with first inlet, first outlet and filter thick liquid inlet;The first inlet is communicated with the clear liquid outlet of the fluidized reactor, and the first outlet is communicated with the inlet of the high-precision filter device;The filter thick liquid inlet is communicated with the filter thick liquid outlet of the high-precision filter device, to input filter thick liquid discharged by the high-precision filter device into the filter circulating tank;The backwashing unit is used to backwash the filter core and the high-precision filter device.
[0008] In some embodiments, the BDO production system further comprises a catalyst recovery pipeline, and the two ends of the catalyst recovery pipeline are respectively communicated with the filter circulating tank and the fluidized reactor, so as to recycle the thick slurry containing catalyst in the filter circulating tank to the fluidized reactor.
[0009] In some embodiments, the BDO production system further comprises a catalyst treatment unit, which comprises: a solid-liquid separation device, an inlet of the solid-liquid separation device being communicated with the catalyst recovery pipeline for performing solid-liquid separation on the catalyst-containing thick slurry; and a BYD recovery pipeline, a liquid outlet of the solid-liquid separation device being communicated with a filter circulation tank through the BYD recovery pipeline.
[0010] In some embodiments, the backwashing unit comprises: a backwashing tank containing filtered clear liquid discharged by the high-precision filter device, the backwashing tank being communicated with the high-precision filter device and the fluidized reactor respectively, so as to use the filtered clear liquid to backwash the filter element in the high-precision filter device and the fluidized reactor.
[0011] In some embodiments, the BDO production system further comprises a BDO product tank, the BDO product tank being communicated with the high-precision filter device for storing the BDO-containing filtered clear liquid discharged by the high-precision filter device.
[0012] In some embodiments, the fluidized reactor is provided with a formaldehyde inlet, a catalyst inlet and an acetylene inlet, the formaldehyde inlet and the catalyst inlet being arranged at the top of the fluidized reactor, and the acetylene inlet being arranged at the bottom of the fluidized reactor.
[0013] In some embodiments, the fluidized reactor is further provided with a plurality of coil pipes, the plurality of coil pipes being communicated with the acetylene inlet for uniformly distributing the pressurized acetylene gas.
[0014] In some embodiments, the filter element is a metal powder sintered filter element, a five-layer sintered mesh filter element or a wedge-shaped mesh filter element.
[0015] In some embodiments, the high-precision filter element of the high-precision filter device is a metal powder sintered filter element, a ceramic sintered filter element, a silicon carbide sintered filter element, a ceramic sintered disc or a silicon carbide sintered disc.
[0016] Compared with the prior art, the BDO production system has the following beneficial effects:
[0017] 1. The filter unit in the BDO production system provided by the utility model comprises a filter element arranged in a fluidized reactor and a high-precision filter device, the filter element first filters reaction slurry obtained by reacting formaldehyde and acetylene gas, then the high-precision filter device performs high-precision filtration, and finally high-purity BDO products are obtained.
[0018] 2, the utility model discloses still provided a catalyst recovery pipeline, in the system's production early stage, the thick pulp containing catalyst in filter circulating tank returns fluidized reactor through catalyst recovery pipeline, participates in the reaction of methanol and acetylene again, and the catalyst reaching the service life in the production later stage carries out solid -liquid separation through solid -liquid separation device, obtains the recovery slurry as the recovery BYD product and carries out high -precision filtration again, and the waste catalyst discharges system, and the catalyst can be recycled, required cost is low, improves the reaction yield;
[0019] 3, the backwashing unit of the utility model can backwash the filter filter core and high-precision device through the filtered clear liquid, prevent filter material from being blocked, and ensure long-period stable use. BRIEF DESCRIPTION OF DRAWINGS
[0020] The utility model is further described below in connection with the drawings and examples.
[0021] Figure 1 The structure schematic diagram of the BDO production system provided by the utility model.
[0022] The meanings of the mark symbols in the drawings are as follows:
[0023] 1 - fluidized reactor; 101 - clear liquid outlet; 102 - catalyst thick pulp inlet;
[0024] 2 - filter circulating tank; 201 - first inlet; 202 - first outlet; 203 - filter thick liquid inlet; 204 - catalyst thick pulp outlet;
[0025] 3 - high-precision filter device; 301 - filter thick liquid outlet;
[0026] 4 - catalyst recovery pipeline; 5 - solid -liquid separation device; 6 - BYD recovery pipeline; 7 - BDO product tank; 8 - backwashing tank; 9 - backwashing feed pipeline. DETAILED DESCRIPTION
[0027] The utility model is further explained in detail below in connection with the description of the drawings and specific examples, but the following description including examples is only used for the ordinary skilled person in the technical field to which the utility model belongs to can more clearly understand the principle and essence of the utility model, does not mean to limit the utility model in any form.
[0028] As Figure 1 Shown, the utility model discloses a kind of BDO production system, including: fluidized reactor 1, filter unit and backwashing unit.
[0029] Fluidized reactor 1 has formaldehyde inlet, catalyst inlet, acetylene inlet and clear liquid outlet 101, the internal space of fluidized reactor 1 can be reacted by formaldehyde, catalyst and pressurized acetylene gas.
[0030] Preferably, the formaldehyde inlet and catalyst inlet are located at the top of the fluidized reactor 1, and the acetylene inlet and clear liquid outlet 101 are located at the bottom of the fluidized reactor 1.
[0031] The fluidized reactor 1 is equipped with a multi-coil coil inside, and the inlet of the multi-coil coil is connected to the acetylene inlet to uniformly distribute pressurized acetylene gas. Under the action of a catalyst, the acetylene gas reacts with formaldehyde, and the catalyst is preferably a copper-bismuth catalyst.
[0032] The filtration unit includes a high-precision filtration device and filter cartridges installed in the fluidized reactor. Multiple filter cartridges can be installed. The reaction slurry obtained by the reaction of acetylene gas and formaldehyde is filtered through the filter cartridges to obtain a clear reaction liquid.
[0033] The filter element is preferably one or more of the following: sintered metal powder filter element, five-layer sintered mesh filter element, and wedge mesh filter element.
[0034] The high-precision filtration device 3 has a built-in high-precision filter element. The high-precision filtration device 3 is connected to the clear liquid outlet 101 of the fluidized reactor 1. The reaction clear liquid discharged from the fluidized reactor 1 enters the high-precision filtration device 3 for high-precision filtration, and finally obtains the BYD product.
[0035] The high-precision filter element mentioned above uses one or more of the following: metal powder sintered filter element, ceramic sintered filter element, silicon carbide sintered filter element, ceramic sintered disc, and silicon carbide sintered disc.
[0036] The aforementioned backwashing unit can backwash the filter cartridge and the high-precision filtration device 3.
[0037] In some embodiments, the high-precision filtration device 3 is provided with a concentrated filtrate outlet 301.
[0038] The BDO production system also includes: a filter circulation tank 2, which is located between the fluidized reactor 1 and the high-precision filtration device 3. The filter circulation tank 2 has a first inlet 201, a first outlet 202, a concentrated filtrate inlet 203, and a catalyst concentrate outlet 204. Specifically:
[0039] like Figure 1 As shown, the first inlet 201 is connected to the clear liquid outlet 101 of the fluidized reactor 1. When the fluidized reactor 1 has two clear liquid outlets 101, the two clear liquid outlets 101 are connected to the first inlet 201 respectively. The first outlet 202 is connected to the inlet of the high-precision filter device 3, so that the reaction clear liquid stored in the filter circulation tank 2 is sent to the high-precision filter device 3.
[0040] The concentrated filtrate outlet 301 of the high-precision filtration device 3 is connected to the concentrated filtrate inlet 203. The concentrated filtrate obtained by the high-precision filtration device 3 is discharged into the filtration circulation tank 2 through the concentrated filtrate inlet 203 for circulation filtration.
[0041] In some embodiments, the BDO production system further comprises a catalyst recovery pipeline 4, which is connected to the filter circulation tank 2 and the fluidized reactor 1 respectively, so as to recycle the catalyst-containing thick slurry in the filter circulation tank 2 to the fluidized reactor 1.
[0042] Specifically, the fluidized reactor 1 has a catalyst thick slurry inlet 102 at the top, and the two ends of the catalyst recovery pipeline 4 are connected to the catalyst thick slurry inlet 102 and the catalyst thick slurry outlet 204 of the filter circulation tank 2 respectively.
[0043] Further, the BDO production system further comprises a catalyst treatment unit, which comprises a solid-liquid separation device 5 and a BYD recovery pipeline 6. The solid-liquid separation device 5 is connected to the catalyst recovery pipeline 4, and separates the catalyst-containing thick slurry to obtain waste catalyst and BYD-containing recovery slurry. The liquid outlet of the solid-liquid separation device 5 is connected to the filter circulation tank 2 through the BYD recovery pipeline 6, and the recovery slurry returns to the filter circulation tank 2 for further high-precision filtration, while the waste catalyst is discharged from the system.
[0044] Preferably, the solid-liquid separation device 5 described above can be a press or a filter press.
[0045] In some embodiments, the backwashing unit described above comprises a backwashing tank 8 containing filtered clear liquid, which is connected to the high-precision filtration device 3 and the fluidized reactor 1 respectively. Specifically, the inlet of the backwashing tank 8 is connected to the outlet of the high-precision filtration device 3, and the outlet of the backwashing tank 8 is connected to the fluidized reactor 1. The filtered clear liquid discharged from the high-precision filtration device 3 is used to backwash the filter element in the high-precision filtration device 3 and the fluidized reactor 1.
[0046] In some embodiments, the BDO production system further comprises a BDO product tank 7, which is connected to the outlet of the high-precision filtration device 3, and is used to collect the BDO-containing filtered clear liquid discharged from the high-precision filtration device 3.
[0047] Further, the system further comprises a backwashing feed pipeline 9, which is connected to the BDO product tank 7 through the outlet of the BDO product tank 7.
[0048] In some embodiments, a pump body is arranged on the connecting pipeline between the catalyst recovery pipeline 4, the filter circulation tank 2 and the high-precision filtration device 3, and the backwashing feed pipeline 9 to provide power for material conveying.
[0049] The operation process of the BDO production system is as follows:
[0050] The crude acetylene gas produced by calcium carbide is washed by a water washing tower, and then enters an acid washing tower and an alkali washing tower. The purified acetylene is pressurized by a compressor, and then is catalytically oxidized with methanol to obtain formaldehyde and a copper-bismuth catalyst.
[0051] The formaldehyde and the copper-bismuth catalyst enter a fluidized reactor 1 through a formaldehyde inlet and a catalyst inlet respectively. The pressurized acetylene gas is uniformly introduced into the fluidized reactor 1 through multiple coil pipes at the bottom of the fluidized reactor 1, and reacts with the formaldehyde under the action of the copper-bismuth catalyst. The reaction slurry is filtered by a filter element arranged in the fluidized reactor 1. The filtrate is discharged from a clear liquid outlet 101, and then enters a filter circulating tank 2 through a first inlet 201. The reaction clear liquid is discharged from a first outlet 202 of the filter circulating tank 2, and then enters a high-precision filtering device 3. The filtered clear liquid obtained by the high-precision filtering device 3 is introduced into a BDO product tank 7.
[0052] The filtered thick slurry obtained by the high-precision filtering device 3 is returned to the filter circulating tank 2. When the concentration reaches a set value, the thick slurry containing the catalyst in the filter circulating tank 2 is discharged through a catalyst recovery pipeline 4. Since the copper-bismuth catalyst has a certain service life, the thick slurry containing the catalyst in the early stage is returned to the fluidized reactor 1 as recovered catalyst. The thick slurry containing the catalyst close to the service life and the catalyst ultra-low particles generated by stage crushing in the later stage is introduced into a solid-liquid separation device 5. The recovered slurry containing BYD produced by the solid-liquid separation device 5 is returned to the filter circulating tank 2 as a recovered BYD product. The solid residue waste catalyst produced by the solid-liquid separation device 5 is discharged from the system for treatment.
[0053] The reaction clear liquid in a backwashing tank 8 is compressed by nitrogen gas to backwash the filter element in the fluidized reactor 1 and the high-precision filtering device 3. The reaction clear liquid in the backwashing tank 8 is supplemented from the BDO product tank 7 through a backwashing feed pipeline 9.
[0054] The ideal embodiment of the utility model is an inspiration. Through the above description, relevant personnel can make various changes and modifications without deviating from the technical concept of the utility model.
[0055] The technical scope of the utility model is not limited to the content in the specification, and must be determined according to the scope of claims.
Claims
1. A BDO production system, The application relates to a BDO production system characterized in that, comprising: a fluidized reactor, a filtering unit, a filtering circulating tank and a backwashing unit; the fluidized reactor is used for reaction of formaldehyde, a catalyst and pressurized acetylene gas; the filtering unit comprises a filtering filter core and a high-precision filtering device, the filtering filter core is arranged in the fluidized reactor and used for filtering reaction slurry; the high-precision filtering device is connected with a clear liquid outlet of the fluidized reactor and used for high-precision filtering of reaction clear liquid discharged from the fluidized reactor; the filtering circulating tank is arranged between the fluidized reactor and the high-precision filtering device, and is provided with a first inlet, a first outlet and a filtering thick liquid inlet; the first inlet is communicated with the clear liquid outlet of the fluidized reactor, and the first outlet is communicated with an inlet of the high-precision filtering device; the filtering thick liquid inlet is communicated with a filtering thick liquid outlet of the high-precision filtering device so as to input filtering thick liquid discharged from the high-precision filtering device into the filtering circulating tank; the backwashing unit is used for backwashing the filtering filter core and the high-precision filtering device.
2. The BDO production system according to claim 1, characterized in that, the BDO production system further comprises a catalyst recovery pipeline, two ends of the catalyst recovery pipeline are respectively communicated with the filtering circulating tank and the fluidized reactor, so as to recycle catalyst-containing thick slurry in the filtering circulating tank to the fluidized reactor.
3. The BDO production system according to claim 2, characterized in that, the BDO production system further comprises a catalyst treatment unit, the catalyst treatment unit comprises a solid-liquid separation device and a BYD recovery pipeline, an inlet of the solid-liquid separation device is communicated with the catalyst recovery pipeline, and is used for solid-liquid separation of the catalyst-containing thick slurry; a liquid outlet of the solid-liquid separation device is communicated with the filtering circulating tank through the BYD recovery pipeline.
4. The BDO production system according to claim 1, characterized in that, the backwashing unit comprises a backwashing tank containing filtering clear liquid discharged from the high-precision filtering device, the backwashing tank is communicated with the high-precision filtering device and the fluidized reactor respectively, so as to use the filtering clear liquid to backwash the filtering filter core in the high-precision filtering device and the fluidized reactor.
5. The BDO production system according to claim 1, characterized in that, the BDO production system further comprises a BDO product tank, the BDO product tank is communicated with the high-precision filtering device, and is used for storing filtering clear liquid containing BDO discharged from the high-precision filtering device.
6. The BDO production system according to claim 1, characterized in that, the fluidized reactor is provided with a formaldehyde inlet, a catalyst inlet and an acetylene inlet, the formaldehyde inlet and the catalyst inlet are arranged at the top of the fluidized reactor, and the acetylene inlet is arranged at the bottom of the fluidized reactor.
7. The BDO production system according to claim 6, characterized in that, a plurality of coil pipes are further arranged in the fluidized reactor, the plurality of coil pipes are communicated with the acetylene inlet and used for uniform distribution of pressurized acetylene gas.
8. The BDO production system of claim 1, wherein the filter core is a metal powder sintered filter core, or a five-layer sintered mesh filter core, or a wedge-shaped mesh filter core.
9. The BDO production system of claim 1, wherein the high-precision filter core of the high-precision filter device is a metal powder sintered filter core, or a ceramic sintered filter core, or a silicon carbide sintered filter core, or a ceramic sintered disc, or a silicon carbide sintered disc.