Device for preparing potassium formate

Abstract

The utility model discloses a device for preparing potassium formate. The device comprises a potassium hydroxide feeding module; a formic acid feeding module; the spiral conveyor comprises a conveyor feeding port and a plurality of conveyor discharging ports, and the conveyor feeding port is connected with the potassium hydroxide feeding module; the weighing bin module comprises a plurality of weighing bin units, a weightometer is arranged in each weighing bin unit, and a feeding port of each weighing bin unit is connected with a discharging port of one conveyor; the reaction kettle module comprises a plurality of reaction kettle units, a first feeding port of each reaction kettle unit is connected with a discharging port of the corresponding weighing bin unit, and a second feeding port of each reaction kettle unit is connected with the formic acid feeding module; the distillation kettle module comprises a distillation kettle unit, and a feeding hole of the distillation kettle unit is connected with a discharging hole of each reaction kettle unit. By applying the device, the requirement of preparing potassium formate on a large scale can be met.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical material preparation, in particular to a device for preparing chemical materials, and more particularly to a device for preparing potassium formate. Background Art

[0002] Potassium formate is an important chemical material. It is widely used in the oil field industry as a drilling fluid, completion fluid, and workover fluid with excellent performance. In addition, it is also widely used in the snow melting agent industry, leather industry, printing and dyeing industry, mining industry, and fertilizer industry.

[0003] Traditionally, potassium formate is prepared by reacting potassium hydroxide with carbon monoxide in water under heating and pressurizing conditions. This process can utilize waste gas containing carbon monoxide and reduce environmental pollution, but the temperature and pressure conditions required for the reaction are high and consume a lot of energy. At present, the industry is gradually using formic acid solution and potassium hydroxide to neutralize potassium formate. The neutralization reaction process has low temperature and pressure requirements, consumes less energy, and makes full use of formic acid, a by-product produced in the chemical production process, as a raw material, which solves the problem of recycling by-products and saves the consumption of raw materials and energy.

[0004] The Chinese patent application with publication number CN215353397U discloses a potassium formate preparation device, which can continuously prepare a qualified potassium formate solution by connecting an auxiliary component to a reactor, thereby improving the use effect of the device. However, the production efficiency of potassium formate prepared by a single reactor is still low, and the amount of raw materials involved in the reaction cannot be accurately controlled, which cannot meet the needs of large-scale production of potassium formate. Summary of the invention

[0005] The utility model aims to provide a device for preparing potassium formate, so as to meet the demand for large-scale preparation of potassium formate.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A device for preparing potassium formate, comprising:

[0008] Potassium hydroxide feeding module, used for feeding potassium hydroxide;

[0009] Formic acid feeding module, used to feed formic acid;

[0010] A screw conveyor, comprising a conveyor feed port and a plurality of conveyor discharge ports, wherein the conveyor feed port is connected to the potassium hydroxide feeding module;

[0011] A weighing bin module, comprising a plurality of weighing bin units, each of which is provided with a weighing meter, and a feed port of each of the weighing bin units is connected to a discharge port of the conveyor;

[0012] A reactor module, comprising a plurality of reactor units, each of which comprises a first feed port, a second feed port and a discharge port, the first feed port of each reactor unit is connected to a discharge port of a weighing bin unit, the second feed port of each reactor unit is connected to the formic acid feeding module, and each reactor unit is further provided with a stirring mechanism;

[0013] The still module comprises a still unit, wherein the feed inlet of the still unit is connected with the discharge outlet of each reaction kettle unit.

[0014] In some embodiments of the present application, the device further comprises:

[0015] A first star-shaped feeder unit, which is disposed between the potassium hydroxide feeding module and the screw conveyor, and is connected to the potassium hydroxide feeding module and the screw conveyor respectively;

[0016] The second star-shaped feeder module comprises a plurality of second star-shaped feeder units, each of which is located between a weighing bin unit and a reactor unit and is connected to the weighing bin unit and the reactor unit respectively.

[0017] In some embodiments of the present application, the potassium hydroxide feeding module includes:

[0018] Potassium hydroxide raw material warehouse, used to hold potassium hydroxide;

[0019] A potassium hydroxide buffer bin, which is located above the screw conveyor and connected to the feed port of the conveyor;

[0020] A bucket elevator, one end of which is connected to the potassium hydroxide raw material bin and the other end of which is connected to the potassium hydroxide buffer bin, is used to lift the potassium hydroxide in the potassium hydroxide raw material bin to the potassium hydroxide buffer bin.

[0021] In some embodiments of the present application, the reactor module further includes a plurality of cooling units, each of which is connected to a jacket of the reactor unit to provide cooling water for the reaction.

[0022] In some embodiments of the present application, the reactor module further includes a plurality of reflux condensing units, each of which is connected to a reactor unit and is used to condense the evaporated gas output from the reactor unit into liquid and then reflux it to the reactor unit.

[0023] In some embodiments of the present application, the distillation kettle module further includes a plurality of decompression units, each of which is connected to one of the distillation kettle units for decompressing the distillation kettle units.

[0024] In some embodiments of the present application, the distillation kettle module further includes a plurality of distillate condensation units, each of which is connected to one of the distillation kettle units and is used to condense the distillation gas output from the distillation kettle unit into liquid.

[0025] Compared with the prior art, the advantages and positive effects of the utility model are:

[0026] The utility model provides a device for preparing potassium formate, which is provided with a potassium hydroxide feeding module, a formic acid feeding module, a screw conveyor, a weighing bin module with a plurality of weighing bin units, a reactor module with a plurality of reactor units and a distillation kettle module. Potassium hydroxide raw materials are quantitatively added to each reactor unit through the potassium hydroxide feeding module, the screw conveyor and the weighing bin unit, and formic acid raw materials are added through the formic acid feeding module, thereby forming a plurality of reaction units that can be fed and operated in parallel, and finally a potassium formate concentrated solution after distillation is obtained from the distillation kettle module, thereby significantly improving the efficiency of preparing potassium formate; moreover, by arranging the weighing bin unit, the amount of potassium hydroxide added in the reactor unit can be accurately controlled, thereby improving the automation and precision control of the entire preparation process, simplifying the manpower input in the preparation process, further improving the preparation efficiency and the concentration requirement of the product, and being suitable for preparing large-scale potassium formate products.

[0027] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, a brief introduction will be given below to the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the device for preparing potassium formate of the utility model;

[0030] Figure 2 yes Figure 1 A schematic diagram of the structure of the reactor unit;

[0031] Figure 3 yes Figure 1 Schematic diagram of the structure of the distillation kettle module.

[0032] In the above figures, the reference numerals and their corresponding component names are as follows:

[0033] 1. Potassium hydroxide feeding module; 11. Potassium hydroxide raw material warehouse; 12. Potassium hydroxide buffer warehouse; 13. Bucket elevator;

[0034] 2. Formic acid feeding module;

[0035] 3. Screw conveyor; 31. Conveying pipe; 32. Conveyor inlet; 33. Conveyor outlet;

[0036] 4. Weighing bin module; 41. Weighing bin unit;

[0037] 5. Reactor module;

[0038] 51, reactor unit; 511, reactor body; 512, first feed inlet; 513, second feed inlet; 514, discharge port; 515, stirring mechanism;

[0039] 52. Cooling unit; 521. Cooling water inlet pipe; 522. Cooling water outlet pipe;

[0040] 53. reflux condensation unit; 531. first condenser; 532. first condenser inlet pipe; 533. first condenser outlet pipe;

[0041] 6. Distillation kettle module;

[0042] 61. distillation kettle unit; 611. distillation kettle body; 612. feed inlet; 613. steam pipe;

[0043] 62. Decompression unit; 621. Vacuum pump; 622. Decompression control valve;

[0044] 63. distillate condensation unit; 631. second condenser; 632. second condenser inlet pipe; 633. second condenser outlet pipe;

[0045] 641, tail gas outlet pipe of distillation kettle; 642, tail gas control valve;

[0046] 7. The first star-shaped feeder unit;

[0047] 8. A second star-shaped feeder module; 81. A second star-shaped feeder unit. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0049] It should be noted that, in the description of the present utility model, the terms "first" and "second" are used only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0050] In the present invention, unless otherwise clearly defined and specified, the terms "connection", "communication" and the like should be understood in a broad sense. For example, "connection" can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0052] Figures 1 to 3 An embodiment of the device for preparing potassium formate of the utility model is shown, wherein: Figure 1 is a schematic diagram of the overall structure of this embodiment, Figure 2 is the structural diagram of the reactor unit. Figure 3 This is a schematic diagram of the structure of the distillation kettle module.

[0053] like Figures 1 to 3 As shown, the device for preparing potassium formate in this embodiment includes a potassium hydroxide feeding module 1, a formic acid feeding module 2, a screw conveyor 3, a weighing bin module 4, a reactor module 5 and a distillation kettle module 6.

[0054] The screw conveyor 3 includes a conveying pipe 31 and a driving motor (not marked in the figure) that drives the conveyor to convey materials through the conveying pipe 31. A spiral blade (not shown in the figure) is arranged in the conveying pipe 31, and the spiral blade is connected to the driving motor. The spiral blade moves under the power of the driving motor to push the material in the conveying pipe 31. The conveying pipe 31 is provided with a conveyor feed port 32 and a plurality of conveyor discharge ports 33. The conveyor feed port 32 is located at one end of the conveying pipe 31, and the plurality of conveyor discharge ports 33 are dispersedly arranged along the feeding direction of the conveying pipe 31. The conveyor feed port 32 is connected to the potassium hydroxide feeding module 1, and the potassium hydroxide in the potassium hydroxide feeding module 1 is put into the conveying pipe 31 through the conveyor feed port 32, and is transported to each conveyor discharge port 33 under the action of the driving motor and the spiral blade.

[0055] The weighing bin module 4 includes a plurality of weighing bin units 41, the number of which matches the number of conveyor discharge ports 33 of the screw conveyor 3. A weighing scale is provided in each weighing bin unit 41 to realize automatic weighing of materials. The feed port of each weighing bin unit 41 is connected to a conveyor discharge port 33 of the screw conveyor 3, and potassium hydroxide enters the weighing bin unit 41 through the conveyor discharge port 33. The materials that meet the weight requirements are weighed by the weighing scale and output from the discharge port of the weighing bin unit 41.

[0056] The reactor module 5 includes a plurality of reactor units 51, the number of which matches the number of weighing bin units 41 in the weighing bin module 4. Each reactor unit 51 includes a reactor body 511, on which a first feed port 512, a second feed port 513 and a discharge port 514 are arranged, and a stirring mechanism 515 is arranged in the reactor body 511. The first feed port 512 of each reactor unit 51 is connected to a discharge port of a weighing bin unit 41, and potassium hydroxide quantitatively output by the weighing bin unit 41 is put into the reactor unit 51 as one of the reaction raw materials. The second feed port 513 of each reactor unit 51 is connected to the formic acid feeding module 2, and the formic acid feeding module 2 is used to put the formic acid solution into the reactor unit 51 as the second reaction raw material, and the potassium hydroxide reacts with the formic acid solution in the reactor unit 51 to obtain a potassium formate solution.

[0057] The still module 6 includes a still unit 61, which includes a still body 611, on which a feed port 612 is provided, and a discharge port 514 of each reactor unit 51 in the reactor module 5 is connected to the feed port 612 of the still unit 61. The still unit 61 uses steam input from a steam pipe 613 to distill the dilute potassium formate solution from the reactor unit 51 to obtain a potassium formate concentrate that is close to a saturated solution.

[0058] In this embodiment, the device for preparing potassium formate is provided with a potassium hydroxide feeding module 1, a formic acid feeding module 2, a screw conveyor 3, a weighing bin module 4 having a plurality of weighing bin units 41, a reactor module 5 having a plurality of reactor units 51, and a distillation kettle module 6, constituting a plurality of reaction units that can be fed and operated in parallel, and finally a concentrated potassium formate solution after distillation is obtained from the distillation kettle module 6, which significantly improves the efficiency of preparing potassium formate; moreover, by providing the weighing bin unit 41, the amount of potassium hydroxide added to the reactor unit 51 can be accurately controlled, thereby improving the automation and precision control of the entire preparation process, simplifying the manpower input in the preparation process, further improving the preparation efficiency and the concentration requirements of the product, and being suitable for large-scale preparation of potassium formate products.

[0059] In some embodiments, the potassium hydroxide feeding module 1 includes a potassium hydroxide raw material bin 11, a potassium hydroxide buffer bin 12 and a bucket elevator 13. The potassium hydroxide raw material bin 11 holds potassium hydroxide for reaction and is located near the ground, which is convenient for operators to put raw materials in. The potassium hydroxide buffer bin 12 is located above the screw conveyor 3, which is convenient for directly putting potassium hydroxide into the screw conveyor 3. The screw conveyor 3 and the potassium hydroxide buffer bin 12 are generally located at a higher position from the ground. Therefore, the potassium hydroxide feeding module 1 is also provided with a bucket elevator 13, one end of which is connected to the potassium hydroxide raw material bin 11, and the other end is connected to the potassium hydroxide buffer bin 12, so as to lift the potassium hydroxide in the potassium hydroxide raw material bin 11 into the potassium hydroxide buffer bin 12.

[0060] In some other embodiments, the device for preparing potassium formate also includes a first star-shaped feeder unit 7 and a second star-shaped feeder module 8. The first star-shaped feeder unit 7 is arranged between the potassium hydroxide feeding module 1 and the screw conveyor 3, and is respectively connected to the potassium hydroxide feeding module 1 and the screw conveyor 3. The second star-shaped feeder module 8 includes a plurality of second star-shaped feeder units 81, the number of which matches the number of weighing bin units 41 in the weighing bin module 4 and the number of reactor units 51 in the reactor module 5. Each second star-shaped feeder unit 81 is located between a weighing bin unit 41 and a reactor unit 51, and is respectively connected to the weighing bin unit 41 and the reactor unit 51. By providing the first star-shaped feeder unit 7 and the second star-shaped feeder unit 81, the potassium hydroxide to be put in can be vibrated and crushed to avoid agglomeration of potassium hydroxide, facilitate accurate control of the amount of put in, and increase the putting speed.

[0061] Potassium hydroxide and formic acid solution release heat when reacting in the reactor. In order to facilitate the temperature control during the reaction process, in some embodiments, the reactor module 5 also includes a plurality of cooling units 52 that match the number of reactor units 51. Each reactor unit 51 is provided with a corresponding cooling unit 52, and each cooling unit 52 is connected to the jacket of the reactor body 511 in the corresponding reactor unit 51 to provide cooling water for the reaction for the reactor unit 51. The cooling unit 52 includes a cooling water inlet pipe 521 and a cooling water outlet pipe 522. One end of the cooling water inlet pipe 521 is connected to an external cooling water supply mechanism, and the other end is connected to the jacket water inlet (not marked in the figure) of the reactor body 511, and the cooling water is input into the jacket of the reactor body 511, flows in the jacket, and cools the reactor body 511. One end of the cooling water outlet pipe 522 is connected to the jacket water outlet (not marked in the figure) of the reactor body 511, and is used to discharge the water in the jacket after heat exchange.

[0062] Potassium hydroxide and formic acid solution release heat during the reaction, and the temperature in the reactor body 511 is relatively high, and formic acid, potassium formate, etc. volatilize into gas at high temperature. In order to improve the recycling rate of volatiles, in some embodiments, the reactor module 5 also includes a plurality of reflux condensing units 53 that match the number of reactor units 51, and each reactor unit 51 is correspondingly provided with a reflux condensing unit 53 and connected to each other. The reflux condensing unit 53 condenses the evaporated gas output by the reactor unit 51 into liquid and then refluxes it to the reactor unit 51. The reflux condensing unit 53 includes a first condenser 531, a first condenser inlet pipe 532 and a first condenser outlet pipe 533. One end of the first condenser inlet pipe 532 is connected to the gas outlet (not marked in the figure) of the reactor body 511, and the other end is connected to the inlet end of the first condenser 531; one end of the first condenser outlet pipe 533 is connected to the outlet end of the first condenser 531, and the other end is connected to the condensed liquid inlet (not marked in the figure) of the reactor body 511. The gas outputted from the reactor unit 51 enters the first condenser 531 through the first condenser inlet pipe 532 to be condensed, and the condensed liquid flows back into the reactor body 511 through the first condenser outlet pipe 533 .

[0063] In some other embodiments, the still module 6 further includes a plurality of distillate condensation units 63 that match the number of still units 61, and each still unit 61 is provided with a corresponding distillate condensation unit 63 and connected to each other, so as to condense the distilled gas outputted from the still unit 61 into liquid. The distillate condensation unit 63 includes a second condenser 631, a second condenser inlet pipe 632, and a second condenser outlet pipe 633, one end of the second condenser inlet pipe 632 is connected to the distilled gas outlet (not marked in the figure) of the still body 611, and the other end is connected to the inlet end of the second condenser 631; one end of the second condenser outlet pipe 633 is connected to the outlet pipe of the second condenser 631, and the other end is connected to a recovery mechanism such as a distillate tank (not shown in the figure) so as to reuse the distillate.

[0064] In order to improve the distillation efficiency of the still kettle module 6, in some embodiments, the still kettle module 6 also includes a plurality of decompression units 62 that match the number of still kettle units 61, and each still kettle unit 61 is provided with a corresponding decompression unit 62 and connected to each other, so as to decompress the still kettle body 611. The decompression unit 62 includes a vacuum pump 621, which is connected to the still kettle body 611 through a pipeline, and a decompression control valve 622 is provided on the pipeline. In some embodiments, the vacuum pump 621 is connected to the still kettle body 611 through a second condenser 631 and a second condenser inlet pipe 632. When the decompression control valve 622 is opened, the vacuum pump 621 extracts the distilled gas in the still kettle body 611 to the second condenser 631 through the second condenser inlet pipe 632, thereby reducing the pressure in the still kettle body 611 and improving the extraction efficiency of the potassium formate concentrate.

[0065] In other embodiments, the still module 6 further includes a still tail gas outlet pipe 641, one end of which is connected to the tail gas outlet of the still body 611, and the other end is connected to a tail gas treatment mechanism (not shown in the figure), and a tail gas control valve 642 is provided on the still tail gas outlet pipe 641. After the distillation is completed, the tail gas control valve 642 is controlled to open, and the tail gas in the still body 611 enters the tail gas treatment mechanism through the still tail gas outlet pipe 641 for treatment.

[0066] In the device for preparing potassium formate, control valves can be set between modules as needed, and each module can also be provided with a temperature detection mechanism, a pressure detection mechanism, a pH value detection mechanism, etc. as needed to efficiently complete the preparation of potassium formate.

[0067] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the above embodiments, or to replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. A device for preparing potassium formate, characterized in that: The device comprises: Potassium hydroxide feeding module, used for feeding potassium hydroxide; Formic acid feeding module, used to feed formic acid; A screw conveyor, comprising a conveyor feed port and a plurality of conveyor discharge ports, wherein the conveyor feed port is connected to the potassium hydroxide feeding module; A weighing bin module, comprising a plurality of weighing bin units, each of which is provided with a weighing meter, and a feed port of each of the weighing bin units is connected to a discharge port of the conveyor; A reactor module, comprising a plurality of reactor units, each of which comprises a first feed port, a second feed port and a discharge port, the first feed port of each reactor unit is connected to a discharge port of a weighing bin unit, the second feed port of each reactor unit is connected to the formic acid feeding module, and each reactor unit is further provided with a stirring mechanism; The still module comprises a still unit, wherein the feed inlet of the still unit is connected with the discharge outlet of each reaction kettle unit.

2. The device for preparing potassium formate according to claim 1, characterized in that The device also includes: A first star-shaped feeder unit, which is disposed between the potassium hydroxide feeding module and the screw conveyor, and is connected to the potassium hydroxide feeding module and the screw conveyor respectively; The second star-shaped feeder module comprises a plurality of second star-shaped feeder units, each of which is located between a weighing bin unit and a reactor unit and is connected to the weighing bin unit and the reactor unit respectively.

3. The device for preparing potassium formate according to claim 1, characterized in that The potassium hydroxide feeding module comprises: Potassium hydroxide raw material warehouse, used to hold potassium hydroxide; A potassium hydroxide buffer bin, which is located above the screw conveyor and connected to the feed port of the conveyor; A bucket elevator, one end of which is connected to the potassium hydroxide raw material bin and the other end of which is connected to the potassium hydroxide buffer bin, is used to lift the potassium hydroxide in the potassium hydroxide raw material bin to the potassium hydroxide buffer bin.

4. The device for preparing potassium formate according to any one of claims 1 to 3, characterized in that The reactor module further comprises a plurality of cooling units, each of which is connected to the jacket of a reactor unit to provide cooling water for the reactor unit.

5. The device for preparing potassium formate according to any one of claims 1 to 3, characterized in that The reactor module further includes a plurality of reflux condensing units, each of which is connected to one of the reactor units and is used for condensing the evaporated gas output from the reactor unit into liquid and then refluxes it to the reactor unit.

6. The device for preparing potassium formate according to any one of claims 1 to 3, characterized in that The still module further comprises a plurality of decompression units, each of which is connected to one still unit and is used for decompressing the still unit.

7. The device for preparing potassium formate according to any one of claims 1 to 3, characterized in that The still module further includes a plurality of distillate condensing units, each of which is connected to one of the still units and is used for condensing the distillation gas output from the still unit into liquid.

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