Esterification catalyst feeding system of BDO device

Abstract

The utility model provides an esterification catalyst feeding system of a BDO device. Comprising a catalyst circulating pump and a pre-esterification reactor which are connected through a main pipeline, an esterification catalyst barrel, a funnel, an esterification catalyst buffer tank and a connecting pipeline, the input end and the output end of the esterification catalyst barrel are connected to the main pipeline through a material inlet pipe and a mixed material output pipe respectively, the material inlet pipe is arranged between the first manual valve and the adjusting valve, the mixed material output pipe is arranged between the adjusting valve and the second manual valve, and the esterification catalyst barrel is connected with the esterification catalyst buffer tank through a funnel. According to the esterification catalyst filling device, pressure difference exists at the positions of the arranged esterification catalyst buffer tank and the regulating valve, the catalyst is introduced to the main pipeline from the buffer tank through control of the hand valve to complete feeding of the catalyst, the catalyst filling process is optimized, the accident risk is reduced, and the filling efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of 1,4-butanediol production, in particular to an esterification catalyst dosing system for a BDO device. Background Art

[0002] The esterification catalyst used in the BDO unit is alkylbenzene sulfonic acid, which is an acidic catalyst with corrosiveness and certain toxicity. Therefore, there are certain safety risks when adding the esterification catalyst. The esterification reaction section needs to add a certain amount of esterification catalyst within the specified time. The current method of adding is to pump the catalyst barrel connecting hose into the catalyst collection tank V-5460 by a diaphragm pump, and then send it to the pre-esterification reactor R-5400 and the esterification reactor by the catalyst circulation pump P-5462A / B. After the reaction is completed, it flows through the high-pressure separation tank and the low-pressure separation tank, and the esterification catalyst is separated as a circulating catalyst and enters the catalyst collection tank to enter the next cycle. The existing method requires more personnel to operate, and multiple hoses need to be connected on site, which causes chaos on site and increases safety hazards. At the same time, considering environmental factors, the weather in the north is cold, and the medium in the pipeline is easy to freeze, so the original method of adding esterification catalyst must be improved. Utility Model Content

[0003] In view of the technical problems raised above, a BDO device esterification catalyst dosing system is provided.

[0004] The technical means adopted by the utility model are as follows:

[0005] A BDO device esterification catalyst dosing system comprises a catalyst circulation pump and a pre-esterification reactor, which are connected by a main pipeline, a regulating valve is arranged on the main pipeline, and a first manual valve and a second manual valve are arranged at the inlet and outlet of the regulating valve, respectively. The system also comprises an esterification catalyst barrel, a funnel, an esterification catalyst buffer tank and a connecting pipeline, wherein the input and output ends of the esterification catalyst buffer tank are connected to the main pipeline through a material inlet pipe and a mixed material outlet pipe, respectively, wherein the material inlet pipe is arranged between the first manual valve and the regulating valve, the mixed material outlet pipe is arranged between the regulating valve and the second manual valve, and the esterification catalyst barrel is connected to the esterification catalyst buffer tank through the funnel.

[0006] Furthermore, a manual valve for the mixed material output pipe is provided on the mixed material output pipe.

[0007] Furthermore, the material inlet pipe is provided with a first material inlet manual valve and a second material inlet manual valve.

[0008] Furthermore, the bottom of the funnel is connected to the esterification catalyst buffer tank through a liquid supply pipeline, and a flow regulating valve is arranged on the liquid supply pipeline.

[0009] Furthermore, the esterification catalyst buffer tank is connected to a nitrogen supply pipe, and a nitrogen flow regulating valve is provided on the nitrogen supply pipe.

[0010] Furthermore, the esterification catalyst buffer tank is connected to a steam supply pipe, and a steam flow regulating valve is provided on the steam supply pipe.

[0011] The utility model has the following advantages: the utility model sets up an esterification catalyst buffer tank, and due to the pressure difference at the regulating valve, the catalyst is introduced from the buffer tank to the main line through the control of the manual valve to complete the addition of the catalyst, replacing the method in the prior art of sending the catalyst into the catalyst collection tank through a diaphragm pump and a hose, and then sending the catalyst into the pre-esterification reactor by the pump, thereby optimizing the catalyst addition process, reducing the risk of accidents, simplifying the operation, and improving the filling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0013] Figure 1 This is a system diagram of the utility model.

[0014] In the figure: 1. Esterification catalyst buffer tank; 2. Esterification catalyst barrel; 3. Funnel; 4. Flow regulating valve; 5. Steam flow regulating valve; 6. Nitrogen flow regulating valve; 7. First material inlet manual valve; 8. Second material inlet manual valve; 9. Mixed material output pipe manual valve. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] The starting point of the utility model is to optimize the filling process of the esterification catalyst, protect personal safety and equipment safety, and improve the efficiency of adding the catalyst. Figure 1As shown, the embodiment of the utility model discloses an esterification catalyst dosing system for a BDO device, comprising a catalyst circulation pump and a pre-esterification reactor, which are connected by a main line, a regulating valve is arranged on the main line, and the inlet and outlet ends of the regulating valve are respectively provided with a first manual valve and a second manual valve (i.e., two valves on the left and right sides of the regulating valve FV-54005 in the figure), and also comprises: an esterification catalyst barrel 2, a funnel 3, an esterification catalyst buffer tank 1 and a connecting pipeline, wherein the input end and the output end of the esterification catalyst buffer tank are respectively connected to the main line through a material inlet pipe and a mixed material output pipe, that is, the connecting pipeline comprises a material inlet pipe and a mixed material output pipe, wherein the material inlet pipe is arranged between the first manual valve and the regulating valve, the mixed material output pipe is arranged between the regulating valve and the second manual valve, and the esterification catalyst barrel is connected to the esterification catalyst buffer tank through the funnel.

[0017] In this embodiment, a platform for placing the esterification catalyst barrel is required. Under the action of the pressure difference before and after the regulating valve and the control of the hand valve, the fresh catalyst in the tank enters the newly added esterification catalyst buffer tank, and then the material mixed with the catalyst enters the main line, and the catalyst and the material are brought into the pre-esterification reactor and the esterification reactor. After the reaction is completed, it flows through the high-pressure separation tank and the low-pressure separation tank, and the esterification catalyst is separated as a circulating catalyst and enters the catalyst collection tank to enter the next cycle.

[0018] Furthermore, a manual valve 9 for the mixed material output pipe is provided on the mixed material output pipe.

[0019] In order to ensure the reliability of material inlet, further, a first material inlet manual valve 7 and a second material inlet manual valve 8 are provided on the material inlet pipe.

[0020] Furthermore, the bottom of the funnel is connected to the esterification catalyst buffer tank via a liquid supply pipeline, and a flow regulating valve 4 is provided on the liquid supply pipeline.

[0021] The barreled catalyst is poured into the funnel through the platform pipe and enters the buffer tank. The amount of catalyst added can be controlled based on the flow regulating valve.

[0022] Furthermore, the esterification catalyst buffer tank is connected to a nitrogen supply pipe, and a nitrogen flow regulating valve 6 is provided on the nitrogen supply pipe.

[0023] Furthermore, the esterification catalyst buffer tank is connected to a steam supply pipe, and a steam flow regulating valve 5 is provided on the steam supply pipe.

[0024] Pipelines for connecting nitrogen and steam are set on the tank. Nitrogen is used to supplement the pressure when the pressure difference is insufficient. After all the catalyst in the tank is sent to the reactor, it is purged with steam to prevent materials or catalysts from remaining in the tank and pipelines, so as to prevent corrosion of the pipelines and freezing. Taking environmental factors into consideration, when the temperature is too low in winter, heating and insulation measures such as heating tapes and thermal insulation cotton need to be installed on the preset pipelines.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A BDO device esterification catalyst dosing system, comprising a catalyst circulation pump and a pre-esterification reactor, the two being connected by a main line, a regulating valve being arranged on the main line, and a first manual valve and a second manual valve being arranged at the inlet and outlet of the regulating valve, respectively. It is characterized in that Also includes: An esterification catalyst barrel, a funnel, an esterification catalyst buffer tank and a connecting pipeline, wherein the input end and the output end of the esterification catalyst buffer tank are connected to the main pipeline through a material inlet pipe and a mixed material outlet pipe respectively, wherein the material inlet pipe is arranged between a first manual valve and a regulating valve, the mixed material outlet pipe is arranged between the regulating valve and a second manual valve, and the esterification catalyst barrel is connected to the esterification catalyst buffer tank through the funnel.

2. The esterification catalyst dosing system of the BDO device according to claim 1, It is characterized in that The mixed material output pipe is provided with a mixed material output pipe manual valve.

3. The esterification catalyst dosing system of the BDO device according to claim 1, It is characterized in that The material inlet pipe is provided with a first material inlet manual valve and a second material inlet manual valve.

4. The esterification catalyst dosing system of the BDO device according to claim 1, It is characterized in that The bottom of the funnel is connected to the esterification catalyst buffer tank through a liquid supply pipeline, and a flow regulating valve is arranged on the liquid supply pipeline.

5. The esterification catalyst dosing system of the BDO device according to claim 1, It is characterized in that The esterification catalyst buffer tank is connected to a nitrogen supply pipe, and a nitrogen flow regulating valve is arranged on the nitrogen supply pipe.

6. The esterification catalyst dosing system of the BDO device according to claim 1, It is characterized in that The esterification catalyst buffer tank is connected to a steam supply pipe, and a steam flow regulating valve is arranged on the steam supply pipe.

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