阅读说明：本技术 一种新型byd废催化剂处理系统 (Novel BYD waste catalyst treatment system ) 是由 范奕 李健 徐伟 于 2019-11-26 设计创作，主要内容包括：本发明公开了一种新型BYD废催化剂处理系统,包括用于以抽滤方式固液分离废催化剂液的抽滤罐；以内置过滤层为界,所述抽滤罐分为上下两部分,上部与废催化剂储罐连通,下部与滤液收集罐连通；所述滤液收集罐用于气液分离滤液及其溶解气,上部与废气燃尽装置连通,下部与BYD收集槽连通。本发明中,通过废催化剂泵将废催化剂液打入该处理系统,经过固液分离、气液分离、燃尽或回收处理,即可实现资源的无害化处理和回收。(The invention discloses a novel BYD waste catalyst treatment system, which comprises a suction filtration tank, a waste catalyst treatment tank and a waste catalyst treatment tank, wherein the suction filtration tank is used for carrying out solid-liquid separation on waste catalyst liquid in a suction filtration mode; the filtration tank is divided into an upper part and a lower part by taking the built-in filter layer as a boundary, the upper part is communicated with the waste catalyst storage tank, and the lower part is communicated with the filtrate collection tank; the filtrate collecting tank is used for separating filtrate and dissolved gas from gas and liquid, the upper part of the filtrate collecting tank is communicated with the waste gas burnout device, and the lower part of the filtrate collecting tank is communicated with the BYD collecting tank. In the invention, the waste catalyst liquid is pumped into the treatment system by the waste catalyst pump, and harmless treatment and recovery of resources can be realized through solid-liquid separation, gas-liquid separation, burnout or recovery treatment.)

1. A novel BYD spent catalyst processing system is characterized in that: comprises a suction filtration tank for solid-liquid separation of the waste catalyst liquid in a suction filtration mode; the filtration tank is divided into an upper part and a lower part by taking the built-in filter layer as a boundary, the upper part is communicated with the waste catalyst storage tank, and the lower part is communicated with the filtrate collection tank; the filtrate collecting tank is used for separating filtrate and dissolved gas from gas and liquid, the upper part of the filtrate collecting tank is communicated with the waste gas burnout device, and the lower part of the filtrate collecting tank is communicated with the BYD collecting tank.

2. The BYD spent catalyst treatment system of claim 1, wherein: the suction filtration tank takes low-pressure nitrogen as a suction filtration gas source and is used for maintaining the inert atmosphere in the suction filtration tank.

3. The BYD spent catalyst treatment system according to claim 1 or 2, wherein: and the filtration tank uses desalted water as a cleaning solution and is used for cleaning the catalyst filter cake.

4. The BYD spent catalyst treatment system according to claim 1 or 2, wherein: the filter layer in the suction filtration tank is obliquely arranged, and the oblique direction is consistent with the direction of the waste catalyst discharged from the suction filtration tank.

5. The BYD spent catalyst treatment system according to claim 1 or 2, wherein: and the suction filtration tank and the filtrate collection tank are connected with pipelines which are provided with valves and used for adjusting the flow of the feed or the discharge materials.

6. The BYD spent catalyst treatment system according to claim 1 or 2, wherein: and pipelines connected with the suction filtration tank and the filtrate collection tank are respectively provided with one or more of a pressure agent, a differential pressure meter, a thermometer and a flowmeter and are used for monitoring the flow of the fed or discharged materials.

7. The BYD spent catalyst treatment system according to claim 1 or 2, wherein: and a liquid level meter is arranged in the suction filtration tank and/or the filtrate collection tank and is used for monitoring the liquid level balance in the suction filtration tank and/or the filtrate collection tank.

8. The BYD spent catalyst treatment system according to claim 1 or 2, wherein: the waste catalyst liquid of the suction filtration tank comes from a BYD reactor and is driven by a waste catalyst pump.

9. The BYD spent catalyst treatment system according to claim 1 or 2, wherein: and a vacuum pump is arranged on a pipeline which is used for being communicated with the waste gas burnout device at the upper part of the filtrate collecting tank, and a filtrate pump is arranged on a pipeline which is used for being communicated with the BYD collecting tank at the lower part of the filtrate collecting tank, so that gas-liquid separation is carried out in the filtrate collecting tank in a negative pressure mode.

Technical Field

The invention relates to the technical field of chemical industry, in particular to a novel BYD waste catalyst treatment system.

Background

1,4-Butanediol (1,4-butane diol, BDO for short) is an important basic organic chemical and fine chemical raw material and has wide application. Its many derivatives are fine chemical products with high added value, and are widely used in many fields in national economy. The 1,4-butanediol has been formed by processes such as acetylenic aldehyde process, butadiene acetyloxidation process, dichlorobutene hydrolysis process, allylic hydroformylation process, and maleic anhydride hydrogenation process, according to various routes of raw materials.

At present, the most adopted production method in China is the alkyne aldehyde method which takes acetylene and formaldehyde as main raw materials. In a 1,4-butanediol device adopting an INVISTA modified alkynal method, raw materials of acetylene and formaldehyde are used for synthesizing BYD (1, 4-butynediol) in a BYD reactor under the action of a slurry solid catalyst (copper acetylide), and the BYD is hydrogenated to produce BDO. Wherein, the BYD reactor is internally provided with 26 candle filters, and the function of the BYD reactor is to separate liquid reaction products from solid copper acetylide catalyst. The effective service time of the acetylene copper catalyst is about 3 months, the acetylene copper catalyst needs to be replaced after being inactivated, and the waste catalyst is delivered after being subjected to primary treatment in the device. The typical treatment method of the acetylene copper catalyst adopted by each device in China at present is as follows: and pumping the inactivated acetylene copper catalyst and the rest BYD reaction liquid in the BYD reactor into a waste catalyst storage tank through a waste catalyst pump, sending the waste catalyst to a plate-and-frame filter press after buffering, removing a large amount of liquid in the waste catalyst through mechanical filter pressing, barreling and sending the waste catalyst out, and sending the obtained filtrate to a sewage treatment device for treatment. From the practical operation point of view, the currently generally adopted treatment method of the acetylene copper catalyst has the following problems:

1. the acetylene copper catalyst is a high-risk flammable and explosive chemical, is easy to spontaneously combust in a dry state, and has a greater safety risk by adopting mechanical filter pressing;

the BYD reaction solution inevitably contains partial incompletely reacted formaldehyde and saturated acetylene gas, and the plate-frame filter press is open-type equipment, so that harmful gases such as formaldehyde, acetylene and the like can volatilize or escape in the filter pressing process and permeate into an operation space, so that serious environmental pollution is caused, and serious potential safety hazards exist;

3. the filtrate contains part of BYD and formaldehyde, and the sewage discharge device can not only cause resource waste but also increase the load of sewage treatment.

Disclosure of Invention

The technical scheme adopted by the invention is as follows:

a novel BYD spent catalyst processing system is characterized in that: comprises a suction filtration tank for solid-liquid separation of the waste catalyst liquid in a suction filtration mode; the filtration tank is divided into an upper part and a lower part by taking the built-in filter layer as a boundary, the upper part is communicated with the waste catalyst storage tank, and the lower part is communicated with the filtrate collection tank; the filtrate collecting tank is used for separating filtrate and dissolved gas from gas and liquid, the upper part of the filtrate collecting tank is communicated with the waste gas burnout device, and the lower part of the filtrate collecting tank is communicated with the BYD collecting tank.

The invention discloses a preferable BYD waste catalyst treatment system, which is characterized in that: the suction filtration tank takes low-pressure nitrogen as a suction filtration gas source and is used for maintaining the inert atmosphere in the suction filtration tank.

The invention discloses a preferable BYD waste catalyst treatment system, which is characterized in that: and the filtration tank uses desalted water as a cleaning solution and is used for cleaning the catalyst filter cake.

The invention discloses a preferable BYD waste catalyst treatment system, which is characterized in that: the filter layer in the suction filtration tank is obliquely arranged, and the oblique direction is consistent with the direction of the waste catalyst discharged from the suction filtration tank.

The invention discloses a preferable BYD waste catalyst treatment system, which is characterized in that: and the suction filtration tank and the filtrate collection tank are connected with pipelines which are provided with valves and used for adjusting the flow of the feed or the discharge materials.

The invention discloses a preferable BYD waste catalyst treatment system, which is characterized in that: and pipelines connected with the suction filtration tank and the filtrate collection tank are respectively provided with one or more of a pressure agent, a differential pressure meter, a thermometer and a flowmeter and are used for monitoring the flow of the fed or discharged materials.

The invention discloses a preferable BYD waste catalyst treatment system, which is characterized in that: and a liquid level meter is arranged in the suction filtration tank and/or the filtrate collection tank and is used for monitoring the liquid level balance in the suction filtration tank and/or the filtrate collection tank.

The invention discloses a preferable BYD waste catalyst treatment system, which is characterized in that: the waste catalyst liquid of the suction filtration tank comes from a BYD reactor and is driven by a waste catalyst pump.

The invention discloses a preferable BYD waste catalyst treatment system, which is characterized in that: and a vacuum pump is arranged on a pipeline which is used for being communicated with the waste gas burnout device at the upper part of the filtrate collecting tank, and a filtrate pump is arranged on a pipeline which is used for being communicated with the BYD collecting tank at the lower part of the filtrate collecting tank, so that gas-liquid separation is carried out in the filtrate collecting tank in a negative pressure mode.

The technical scheme of the invention is realized as follows:

1. pumping the waste catalyst liquid (BYD reaction liquid containing acetylene copper catalyst) into a suction filtration tank with a built-in filtration facility through a waste catalyst pump;

2. performing suction filtration on the material in the suction filtration tank by adopting low-pressure nitrogen, wherein the waste catalyst is retained on a filter layer, and the BYD reaction liquid enters a downstream filtrate collection tank through the filter layer;

3. adding desalted water into the suction filtration tank, cleaning the catalyst, enabling cleaning liquid to enter a filtrate collection tank through a filter layer, and enabling the waste catalyst to remain on the filter layer;

4. starting a vacuum pump directly connected with the filtrate collecting tank to generate vacuum, carrying out suction filtration on the materials in the suction filtration tank, and delivering gases containing harmful media such as acetylene, formaldehyde and the like extracted by the vacuum pump to incineration treatment;

5. and discharging the cleaned water-containing waste catalyst out of the suction filtration tank, barreling and conveying the catalyst out, and returning the filtrate (containing BYD reaction liquid and cleaning liquid) collected in the filtrate collection tank to the BYD collection tank for recycling.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

the implementation of the invention can effectively avoid the extrusion and impact of the acetylene copper and realize the full sealing of the treatment process. Compared with the scheme of treating the waste catalyst liquid by mechanical filter pressing in the prior art, the method has the following advantages:

1. eliminating environmental pollution caused by the treatment process of the waste catalyst liquid;

2. the safety of the waste catalyst liquid treatment process is obviously improved, and the labor intensity of operators is reduced;

3. useful components such as BYD, formaldehyde and the like are effectively recovered, and the economic effect of a production system is improved while the sewage treatment load is reduced.

Drawings

The invention will now be described, by way of example, with reference to the accompanying drawings, in which:

fig. 1 is a schematic view of the overall structure of the present invention.

Description of reference numerals:

the method comprises the following steps of 1-BYD reactor, 2-waste catalyst pump, 3-suction filtration tank, 4-waste catalyst storage tank, 5-filtrate collection tank, 6-vacuum pump, 7-waste gas burnout device, 8-filtrate pump, 9-BYD collection tank, 10-desalted water and 11-low-pressure nitrogen.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the description of the present invention, it is to be understood that the terms indicating an orientation or positional relationship are based on the orientation or positional relationship shown in the drawings only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

At present, acetylene aldehyde method which takes acetylene and formaldehyde as main raw materials is the most adopted production method in China and the world. As shown in figure 1, in a BDO production system adopting an INVISTA modified alkynylaldehyde method, raw materials of acetylene and formaldehyde are used for synthesizing BYD in a BYD reactor 1 under the action of a slurry state acetylene copper catalyst, and the BYD is hydrogenated to produce BDO. The effective service time of the acetylene copper catalyst is about 3 months, the acetylene copper catalyst needs to be replaced after inactivation, and the waste catalyst liquid needs to be further treated for realizing harmless treatment and recovery of resources. The invention relates to a novel BYD waste catalyst treatment system, which is characterized in that waste catalyst liquid is pumped into the treatment system through a waste catalyst pump 2, and harmless treatment and recovery of resources can be realized through solid-liquid separation, gas-liquid separation, burnout or recovery treatment. Specifically, the treatment system comprises a suction filtration tank 3 for solid-liquid separation of the spent catalyst liquid in a suction filtration manner; the internal filter layer is used as a boundary, the suction filtration tank 3 is divided into an upper part and a lower part, the upper part is communicated with the waste catalyst storage tank 4, and the lower part is communicated with the filtrate collection tank 5; the filtrate collecting tank 5 is used for separating filtrate and dissolved gas from gas and liquid, the upper part of the filtrate collecting tank is communicated with the waste gas burnout device 7, and the lower part of the filtrate collecting tank is communicated with the BYD collecting tank 9.

According to the invention, the waste catalyst liquid is pumped into the suction filtration tank 3 with a built-in filtering facility, the material in the suction filtration tank 3 is subjected to suction filtration, so that the waste catalyst is retained on the filter layer, and the BYD reaction liquid enters the downstream filtrate collection tank 5 through the filter layer, so that the separation of the waste catalyst and the BYD reaction liquid is realized, the extrusion and impact on the acetylene copper can be effectively avoided, and the combustion or explosion of the acetylene copper can be avoided. Moreover, the filtrate collecting tank 5 can volatilize or escape the dissolved gas in the filtrate, and the dissolved gas can be prevented from polluting the environment of the operation space after being treated by the waste gas burnout device 7; meanwhile, the filtrate after degassing can be collected and returned to BYD or BDO production again, so that the waste of resources is reduced, and the sewage treatment load is reduced.