A continuous souring process system of MST

Abstract

The application discloses a kind of MST continuous bound acid process systems, including multiple parallelly arranged reduction kettle;The top of the reduction kettle is respectively connected with soda ash metering feeding device and PTSC metering feeding device by pipeline;The bottom of the reduction kettle is filtered by pipeline and is sent to the reduction liquid pump front filter;The reduction liquid pump front filter is filtered by two parallelly connected reduction liquid delivery pumps and is sent to the MST continuous production process;The application is provided with soda ash metering feeding device and PTSC metering feeding device, and soda ash metering feeding device and PTSC metering feeding device are provided with loss-in-weight scale total bin and loss-in-weight scale sub-bin, and high-precision continuous quantitative feeding is realized by static weighing, to ensure that soda ash and p-toluenesulfonyl chloride are continuously and uniformly added, to reduce the occurrence of side reactions, to reduce raw material consumption, and to ultimately produce qualified MST products.

Description

Technical Field

[0001] This invention relates to the field of chemical technology, specifically to an MST continuous acid binding process system. Background Technology

[0002] The MST production process involves a reduction reaction using soda ash and p-toluenesulfonyl chloride. Feeding is done via a weighing hopper, with continuous weighing after the materials enter the hopper via a conveyor. This method suffers from poor feeding accuracy. Later, due to this inaccuracy, feeding is stopped when replenishing the hopper, effectively resulting in intermittent feeding and a reduced feeding speed. When both materials are fed simultaneously, the feeding speeds are poorly matched, leading to more side reactions and the generation of byproducts that negatively impact the quality of the MST product.

[0003] Based on the above, this invention proposes an MST continuous acid binding process system, which can effectively solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a continuous MST acid-binding process system. This MST continuous acid-binding process system, provided by this invention, incorporates a soda ash metering and feeding device and a PTSC metering and feeding device. Both the soda ash metering and feeding devices are equipped with a total loss-in-weight weighing hopper and a distribution hopper. High-precision continuous quantitative feeding is achieved through static weighing, ensuring continuous and uniform addition of soda ash and p-toluenesulfonyl chloride, reducing side reactions, lowering raw material consumption, and ultimately producing qualified MST products.

[0005] This invention is achieved through the following technical solution:

[0006] An MST continuous acid binding process system includes multiple reduction reactors connected in parallel; the top of each reduction reactor is connected to a soda ash metering and feeding device and a PTSC metering and feeding device via pipelines; the bottom of each reduction reactor is connected to a reducing solution via a pipeline to a reducing solution pre-pump filter; the reducing solution pre-pump filter is connected to the MST continuous production process via two parallel reducing solution delivery pumps.

[0007] The soda ash metering and feeding device includes multiple soda ash storage silos; a first elevator is installed at the bottom of each soda ash storage silo, which conveys soda ash upwards to the main soda ash loss-in-weight scale silo; a soda ash conveyor is connected to the bottom of the main soda ash loss-in-weight scale silo, which conveys soda ash to multiple soda ash loss-in-weight scale distribution silos; and each of the multiple soda ash loss-in-weight scale distribution silos conveys soda ash to its corresponding reduction reactor.

[0008] The PTSC metering and feeding device includes a paddle dryer; the top inlet of the paddle dryer is connected to a PTSC conveyor; the bottom outlet of the paddle dryer conveys the dried PTSC to a PTSC transition silo, which then conveys the PTSC to a packaging conveyor and a PTSC loss-in-weight scale main silo via a second elevator; the bottom of the PTSC loss-in-weight scale main silo is connected to a PTSC conveyor, which conveys the PTSC to multiple PTSC loss-in-weight scale distribution silos; and each of the multiple PTSC loss-in-weight scale distribution silos conveys the corresponding PTSC to its respective reduction reactor.

[0009] According to the above technical solution, as a further preferred technical solution, the top of the reduction vessel is connected to a sodium sulfite input pipe and a tail gas output pipe.

[0010] According to the above technical solution, as a further preferred technical solution, the PTSC metering and feeding device includes a dust removal mechanism; the dust removal mechanism includes a dust collector, a nitrogen input pipe is connected to the top of one side of the dust collector, and a dust outlet is provided at the bottom of the dust collector; the dust collector is connected to the exhaust port of the paddle dryer through a pipe, and the dust collector is connected to a suction horn through a pipe, the suction horn being located on one side of the packaging conveyor; the exhaust port of the dust collector is connected to a tail gas condenser through a pipe, and the tail gas condenser is provided with a tail gas discharge pipe and a dichloromethane discharge pipe.

[0011] According to the above technical solution, as a further preferred technical solution, the top of the soda ash storage silo is provided with a suction pipe for connecting a soda ash tanker.

[0012] According to the above technical solution, as a further preferred technical solution, the inside of the paddle dryer is provided with stirring blades; the top of the paddle dryer is connected to a water outlet pipe, and the bottom of the paddle dryer is connected to a water inlet pipe.

[0013] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0014] The present invention provides an MST continuous acid-binding process system, which sets up a soda ash metering and feeding device and a PTSC metering and feeding device, and both the soda ash metering and feeding device and the PTSC metering and feeding device are equipped with a total loss-in-weight weighing bin and a distribution bin. High-precision continuous quantitative feeding is achieved by static weighing, which ensures that soda ash and p-toluenesulfonyl chloride are added continuously and uniformly, reduces the occurrence of side reactions, reduces raw material consumption, and finally produces qualified MST products. Attached Figure Description

[0015] Figure 1 This is a process flow diagram of the present invention. Detailed Implementation

[0016] To enable those skilled in the art to better understand the technical solutions of the present invention, preferred embodiments of the present invention are described below in conjunction with specific examples. However, it should be understood that the accompanying drawings are for illustrative purposes only and should not be construed as limiting the present patent. For better illustration of this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable that some well-known structures and their descriptions may be omitted in the drawings for those skilled in the art. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting the present patent.

[0017] An MST continuous acid binding process system includes multiple reduction reactors 1 connected in parallel; the top of each reduction reactor 1 is connected to a soda ash metering and feeding device and a PTSC metering and feeding device via pipelines; the bottom of each reduction reactor 1 is connected to a reducing solution pre-pump filter 2 via pipelines; the reducing solution pre-pump filter 2 is connected to the MST continuous production process 4 via two parallel-connected reducing solution transfer pumps 3.

[0018] The soda ash metering and feeding device includes multiple soda ash storage silos 5; a first elevator 6 is installed at the bottom of each soda ash storage silo 5, which conveys soda ash upward to the soda ash loss-in-weight scale main silo 7; a soda ash conveyor 8 is connected to the bottom of the soda ash loss-in-weight scale main silo 7, which conveys soda ash to multiple soda ash loss-in-weight scale distribution silos 9; and the multiple soda ash loss-in-weight scale distribution silos 9 respectively convey soda ash to each corresponding reduction reactor 1.

[0019] The PTSC metering and feeding device includes a paddle dryer 10; the top inlet of the paddle dryer 10 is connected to a PTSC conveyor 11; the bottom outlet of the paddle dryer 10 conveys the dried PTSC to a PTSC transition silo 12, and the PTSC transition silo 12 conveys PTSC to a packaging conveyor 14 and a PTSC loss-in-weight scale main silo 15 respectively via a second elevator 13; the bottom of the PTSC loss-in-weight scale main silo 15 is connected to a PTSC conveyor 16, and the PTSC conveyor 16 conveys PTSC to multiple PTSC loss-in-weight scale distribution silos 17 respectively; the multiple PTSC loss-in-weight scale distribution silos 17 respectively convey the corresponding PTSC to each reduction reactor 1.

[0020] This invention achieves high-precision continuous quantitative feeding by setting up a soda ash metering and feeding device and a PTSC metering and feeding device, both of which are equipped with a total loss-in-weight weighing hopper and a distribution hopper. This ensures continuous and uniform addition of soda ash and p-toluenesulfonyl chloride through static weighing, reduces the occurrence of side reactions, lowers raw material consumption, and ultimately produces qualified MST products.

[0021] Furthermore, in another embodiment, the top of the reduction vessel 1 is connected to a sodium sulfite inlet pipe 18 and a tail gas outlet pipe 19. The sodium sulfite inlet pipe 18 facilitates the input of sodium sulfite, and the tail gas outlet pipe 19 facilitates the emission of CO2 generated after the reaction.

[0022] Furthermore, in another embodiment, the PTSC metering and feeding device includes a dust removal mechanism; the dust removal mechanism includes a dust collector 20, with a nitrogen input pipe 21 connected to the top of one side of the dust collector 20, and a dust outlet 22 provided at the bottom of the dust collector 20; the dust collector 20 is connected to the exhaust port of the paddle dryer 10 through a pipe, and the dust collector 20 is connected to a suction horn 23 through a pipe, the suction horn 23 being located on one side of the packaging conveyor 14; the exhaust port of the dust collector 20 is connected to a tail gas condenser 24 through a pipe, the tail gas condenser 24 being provided with a tail gas discharge pipe 25 and a dichloromethane discharge pipe 26. By setting up the dust removal mechanism, the dust collector 20 can remove the tail gas contained inside the paddle dryer 10, and at the same time remove the dust particles generated during the operation of the packaging conveyor 14; simultaneously, by setting up the tail gas condenser 24, the gas after dust removal can be recovered and heat exchanged, and the residual dichloromethane in the tail gas can be recovered.

[0023] Furthermore, in another embodiment, the top of the soda ash storage silo 5 is provided with a suction pipe 27 for connecting to a soda ash tank truck. By providing the suction pipe 27, it is convenient to transport the soda ash in the tank truck to the soda ash storage silo 5.

[0024] Furthermore, in another embodiment, the paddle dryer 10 is equipped with stirring blades 28 inside; the top of the paddle dryer 10 is connected to a water outlet pipe 29, and the bottom of the paddle dryer 10 is connected to a water inlet pipe 30. By providing stirring blades 28 inside the paddle dryer 10, the PTSC entering the paddle dryer 10 is sufficiently stirred, increasing the drying efficiency.

[0025] Example 2

[0026] This embodiment uses the MST continuous flow solid acid binder reaction control system to conduct a batching, feeding verification, and weighing simulation experiment. Comparing the MST product consumption before and after the improvement, the improved MST product consumption significantly decreased, indicating that the improvement greatly improved normal production and increased output. See Table 1 for details.

[0027] Table 1: Comparison of Product Consumption per Ton of MST Before and After Modification

[0028]

[0029] Experimental Conclusion: The experimental data above shows that the MST continuous flow solid acid binder reaction control system is effective for batching and feeding. It receives the raw materials (soda ash and PTSC) from the main loss-in-weight weigher hopper, and then feeds them into the distribution hoppers. The distribution hoppers are small in volume, have high weighing accuracy, and are equipped with a PLC control program (existing technology) for continuous feeding and replenishment. After setting the feeding speed via a DCS (existing technology), the system automatically adjusts the feeding and replenishment to ensure uniform feeding speed and matching ratios of PTSC and soda ash, thus preventing side reactions.

[0030] Based on the description and accompanying drawings of this invention, those skilled in the art can readily manufacture or use the MST continuous acid binding process system of this invention, and can achieve the positive effects described in this invention.

[0031] Unless otherwise specified, in this invention, terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe orientation or positional relationships in this invention are for illustrative purposes only and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood in conjunction with the accompanying drawings and according to the specific circumstances.

[0032] Unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" in this invention should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. An MST continuous acid binding process system, characterized in that: The system includes multiple reduction reactors (1) connected in parallel; the top of each reduction reactor (1) is connected to a soda ash metering and feeding device and a PTSC metering and feeding device via pipelines; the bottom of each reduction reactor (1) is connected to a reducing liquid pump pre-filter (2) via pipelines; the reducing liquid pump pre-filter (2) is connected to the MST continuous production process (4) via two parallel reducing liquid transfer pumps (3); The soda ash metering and feeding device includes multiple soda ash storage silos (5); a first elevator (6) is provided at the bottom of the soda ash storage silos (5), which conveys soda ash upward to the soda ash loss-in-weight scale main silo (7); a soda ash conveyor (8) is connected to the bottom of the soda ash loss-in-weight scale main silo (7), which conveys soda ash to multiple soda ash loss-in-weight scale distribution silos (9); the multiple soda ash loss-in-weight scale distribution silos (9) respectively convey soda ash to each reduction kettle (1); The PTSC metering and feeding device includes a paddle dryer (10); the top inlet of the paddle dryer (10) is connected to a PTSC conveyor (11); the bottom outlet of the paddle dryer (10) conveys the dried PTSC to a PTSC transition silo (12), and the PTSC transition silo (12) conveys PTSC to a packaging conveyor (14) and a PTSC loss-in-weight scale main silo (15) respectively via a second elevator (13); the bottom of the PTSC loss-in-weight scale main silo (15) is connected to a PTSC conveyor (16), and the PTSC conveyor (16) conveys PTSC to multiple PTSC loss-in-weight scale distribution silos (17); the multiple PTSC loss-in-weight scale distribution silos (17) respectively convey PTSC to each reduction reactor (1); PTSC specifically stands for p-toluenesulfonyl chloride, and MST specifically stands for p-methylsulfonyltoluene.

2. The MST continuous acid binding process system according to claim 1, characterized in that: The top of the reduction vessel (1) is connected to a sodium sulfite input pipe (18) and a tail gas output pipe (19).

3. The MST continuous acid binding process system according to claim 1, characterized in that: The PTSC metering and feeding device includes a dust removal mechanism; the dust removal mechanism includes a dust collector (20), a nitrogen input pipe (21) is connected to the top of one side of the dust collector (20), and a dust outlet (22) is provided at the bottom of the dust collector (20); the dust collector (20) is connected to the exhaust port of the paddle dryer (10) through a pipe, and the dust collector (20) is connected to a suction horn (23) through a pipe, and the suction horn (23) is provided on one side of the packaging conveyor (14); the exhaust port of the dust collector (20) is connected to the tail gas condenser (24) through a pipe, and the tail gas condenser (24) is provided with a tail gas discharge pipe (25) and a dichloromethane discharge pipe (26).

4. The MST continuous acid binding process system according to claim 1, characterized in that: The top of the soda ash storage silo (5) is provided with a suction pipe (27) for connecting to a soda ash tank truck.

5. The MST continuous acid binding process system according to claim 1, characterized in that: The blade dryer (10) is equipped with stirring blades (28); the top of the blade dryer (10) is connected to a water outlet pipe (29), and the bottom of the blade dryer (10) is connected to a water inlet pipe (30).

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