Automatic water sample concentrating and ashing device

Abstract

The utility model discloses an automatic water sample concentrating and ashing device which comprises a microwave evaporator and a muffle furnace, the top of the microwave evaporator is fixedly connected with a motor, the tail end of an output shaft of the motor is fixedly connected with a spraying barrel, the microwave evaporator is fixedly connected with an infrared thermometer, an evaporating pan is installed in the microwave evaporator, and the evaporating pan is fixedly connected with the spraying barrel. The bottom of the evaporation dish is fixedly connected with a towed weighing balance, the towed weighing balance is arranged on the microwave evaporator, one side of the microwave evaporator is provided with a water and acid adding mechanism, one side of the microwave evaporator is provided with a water adding mechanism, and the evaporation dish is provided with a conveying mechanism connected with the evaporation dish. The equipment disclosed by the utility model is small in occupied area and high in evaporation and concentration speed, and evaporation, concentration and ashing can be integrated.

Description

Technical Field

[0001] The utility model relates to the technical field of concentrated ashing, in particular to an automatic concentrated ashing device for water samples. Background Art

[0002] The evaporation concentration and ashing technology of liquid in sample pretreatment is widely used in the detection field, and is usually used for the detection of trace elements in liquids. Traditionally, evaporation concentration methods mostly use electric heating plates or water bath heating; the advantages of electric heating plates are low price and convenient operation, but the temperature control of the electric heating plates is inaccurate, which can easily cause liquid splashing, affect data detection, and the evaporation speed is slow; water bath heating also has the problem of slow evaporation.

[0003] The liquid evaporated and concentrated by the above two methods needs to be transferred to a high-temperature furnace cavity for high-temperature ashing. The existing microwave liquid concentrator uses a 2L evaporating dish as a container. Each furnace cavity evaporates and concentrates a liquid sample. After the concentration is completed, the concentrated solution needs to be transferred to a 100 ml crucible, and the crucible is placed in a dedicated high-temperature furnace cavity for ashing. This type of equipment occupies a large volume. The height of the microwave liquid concentrator when processing four samples at a time is about 1.8 meters, and the working furnace cavity needs to be converted during the ashing process. The ashing furnace cavity also occupies a large space. A microwave liquid concentrator that processes 4 samples at the same time and has an ashing function is nearly 2 meters high. Therefore, based on the above technical problems, there is an urgent need for a device with a fast evaporation and concentration speed and integrated evaporation, concentration and ashing. Utility Model Content

[0004] The utility model aims to solve the shortcomings of the prior art and proposes an automatic water sample concentration and ashing device, which occupies a small area, has a fast evaporation and concentration speed, and the evaporation and concentration and ashing can be integrated.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A water sample automatic concentration and ash device comprises a microwave evaporator and a muffle furnace, wherein a motor is fixedly connected to the top of the microwave evaporator, a spray barrel is fixedly connected to the end of the output shaft of the motor, an infrared thermometer is fixedly connected to the microwave evaporator, an evaporating dish is installed in the microwave evaporator, a tow-type weighing balance is fixedly connected to the bottom of the evaporating dish, the tow-type weighing balance is installed on the microwave evaporator, a water and acid adding mechanism is provided on one side of the microwave evaporator, a water adding mechanism is provided on one side of the microwave evaporator, a conveying mechanism connected thereto is provided on the evaporating dish, slide rails are installed on both sides of the muffle furnace, a porcelain evaporating dish is placed on the slide rail on the left side, a left push rod is fixedly connected to the slide rail on the left side, and a right push rod is fixedly connected to the slide rail on the right side, a weighing support plate is provided in the muffle furnace, the weighing support plate is fixedly connected to a hanging weighing balance, a lifting motor is installed on the hanging weighing balance, and the lifting motor is installed on the top of the muffle furnace.

[0007] Preferably, the water and acid adding mechanism includes an acid cup and a deionized water cup arranged on the right side of the microwave evaporator, the acid cup is provided with a first suction pipe, the deionized water cup is provided with a second suction pipe, the first suction pipe is fixedly connected to a first peristaltic pump, the second suction pipe is fixedly connected to a second peristaltic pump, the first peristaltic pump and the second peristaltic pump are commonly fixedly connected to an acid / water pipe, and one end of the acid / water pipe is connected to a spray barrel.

[0008] Preferably, the water adding mechanism comprises a water sample cup arranged on the right side of the microwave evaporator, a third straw is installed on the water sample cup, the third straw is fixedly connected to a third peristaltic pump, the third peristaltic pump is fixedly connected to a water sample tube, and one end of the water sample tube is located above the evaporating dish.

[0009] Preferably, the conveying mechanism comprises a water outlet pipe fixedly connected to the evaporating dish, the water outlet pipe is fixedly connected to a fourth peristaltic pump, the fourth peristaltic pump is fixedly connected to a downpipe, and the downpipe is arranged above the porcelain evaporating dish.

[0010] Preferably, a muffle furnace door is installed on the muffle furnace.

[0011] Preferably, the microwave evaporator is provided with an evaporator door.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. Monitor the weight of the sample using a weight sensor or electronic balance.

[0014] 2. Determine the evaporation situation based on the weight of the liquid and inject the liquid through the pump group.

[0015] 3. The residual liquid is pumped into the thermogravimetric analyzer through the pump group.

[0016] 4. Thermogravimetric analyzer determines the constant weight after burning based on the weight.

[0017] In summary, the equipment occupies a small area, has a fast evaporation and concentration speed, and the evaporation and concentration and ashing can be integrated. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is a schematic diagram of the structure of a water sample automatic concentration and ashing device.

[0019] In the figure: 1 microwave evaporator, 2 motor, 3 spray tube, 4 infrared thermometer, 5 evaporating dish, 6 towed weighing balance, 7 water outlet pipe, 8 water sample cup, 9 acid cup, 10 deionized water cup, 11 acid / water pipe, 12 water sample tube, 13 downpipe, 14 left push rod, 15 porcelain evaporating dish, 16 muffle furnace, 17 slide rail, 18 right push rod, 19 weighing support plate, 20 hanging weighing balance, 21 lifting motor, 22 muffle furnace door, 24 evaporator door. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] Reference Figure 1 A water sample automatic concentration and ashing device comprises a microwave evaporator 1 and a muffle furnace 16. The microwave evaporator 1 is provided with an evaporator door 24, the muffle furnace 16 is provided with a muffle furnace door 22, the top of the microwave evaporator 1 is fixedly connected with a motor 2, the end of the output shaft of the motor 2 is fixedly connected with a spray barrel 3, the microwave evaporator 1 is fixedly connected with an infrared thermometer 4, an evaporating dish 5 is provided in the microwave evaporator 1, the bottom of the evaporating dish 5 is fixedly connected with a towed weighing balance 6, and the towed weighing balance 6 is installed on the microwave evaporator The microwave evaporator 1 is provided with a water and acid adding mechanism on one side, the water and acid adding mechanism comprises an acid cup 9 and a deionized water cup 10 arranged on the right side of the microwave evaporator 1, the acid cup 9 is provided with a first suction pipe, the deionized water cup 10 is provided with a second suction pipe, the first suction pipe is fixedly connected to a first peristaltic pump, the second suction pipe is fixedly connected to a second peristaltic pump, the first peristaltic pump and the second peristaltic pump are commonly fixedly connected to an acid / water pipe 11, the acid / water pipe 11 is a three-way pipe, and one end of the acid / water pipe 11 is connected to the spray barrel 3.

[0022] A water adding mechanism is provided on one side of the microwave evaporator 1, and the water adding mechanism includes a water sample cup 8 arranged on the right side of the microwave evaporator 1, and a third suction pipe is installed on the water sample cup 8. The third suction pipe is fixedly connected to the third peristaltic pump, and the third peristaltic pump is fixedly connected to the water sample tube 12. One end of the water sample tube 12 is located above the evaporating dish 5.

[0023] The evaporating dish 5 is provided with a conveying mechanism connected thereto, the conveying mechanism includes a water outlet pipe 7 fixedly connected to the evaporating dish 5 , the water outlet pipe 7 is fixedly connected to a fourth peristaltic pump, the fourth peristaltic pump is fixedly connected to a downpipe 13 , and the downpipe 13 is arranged above the porcelain evaporating dish 15 .

[0024] Slide rails 17 are installed on both sides of the muffle furnace 16, a porcelain evaporating dish 15 is placed on the left slide rail 17, a left push rod 14 is fixedly connected to the left slide rail 17, and a right push rod 18 is fixedly connected to the right slide rail 17. A weighing support plate 19 is provided in the muffle furnace 16, and a hanging weighing balance 20 is fixedly connected to the weighing support plate 19. The hanging weighing balance 20 is installed with a lifting motor 21, and the lifting motor 21 is installed on the top of the muffle furnace 16.

[0025] In the present invention, (1) water sample evaporation:

[0026] 1. The microwave evaporator uses microwave heating and infrared thermometer for infrared temperature measurement. The microwave power is controlled by infrared temperature measurement to ensure that the water sample is evaporated and concentrated in a slightly boiling state;

[0027] 2. Use a peristaltic pump to inject the liquid in batches, and pass the water sample through a filter before injection;

[0028] 3. Use a drag-type weighing balance to monitor the quality of the evaporating dish and the water sample. When the final required water sample quality is reached, stop microwave heating and transport the evaporating dish to the muffle furnace ashing area through a push rod;

[0029] 4. Cleaning: Complete a cycle process to clean the evaporating dish and pipelines;

[0030] 5. Dehumidification: The waste gas from the evaporation process is discharged centrally through the pipes behind the furnace.

[0031] (2) High temperature burning:

[0032] Microwave heating is adopted, and a hanging weighing balance is used to weigh the crucible and ash; a muffle furnace is used to keep the porcelain evaporating dish constant weight; the water sample after acid addition is driven out of the acid; the ash is burned at high temperature; process flow:

[0033] 1. Peristaltic pump K2 pumps the water sample to be processed into the evaporating dish, and the amount of water pumped in is controlled by the drag-type weighing balance (for example, 100 grams). During the evaporation process, the drag-type weighing balance also controls the time for pumping in the water sample again (for example, the weight of the water remaining is 10 grams). Repeat this process several times to complete the evaporation function;

[0034] 2. The peristaltic pump K3 pumps the acid into the evaporating dish. During the pumping process, a water sample tube and an acid / water tube are set on the top of the spray tube, and the motor drives it to reciprocate 180 degrees. A strip-shaped porous shower structure is set at the front to achieve the purpose of circumferential acid addition and cleaning.

[0035] 3. In the process of 1-2, the porcelain evaporating dish is placed in a muffle furnace for constant weight at high temperature, and is pushed to the position shown in the figure by the right push rod;

[0036] 4. Combined with the descriptions of 1, 2, and 3, the working logic is to turn on the K2 pump to add water sample to the evaporating dish to the set weight, then evaporate, and add liquid in sequence; during the acid addition stage, the K3 pump can be used to add acid through the circumferential rotation of the spray bar. After completion, K1 opens the concentrated sample into the bottom porcelain evaporating dish (porcelain crucible), and then pump K4 is turned on to continue to spray deionized water circumferentially for cleaning, and the liquid is collected in the porcelain crucible. In order to achieve the function of cleaning the wall of the evaporating dish and wash off the residue hanging on the wall, the process requires slow acid addition to prevent splashing;

[0037] 5. The left and right push rods are used to position the porcelain evaporating dish to two positions. The left position is for liquid addition and material discharge, and the right position is for purification, furnace entry and thermal gravity.

[0038] 6. The thermal weight adopts a hanging balance structure, and the balance can be raised and lowered. It can measure weight when it is raised, and it can make the slide rail structure complete when it is lowered;

[0039] 7. Combining points 5 and 6, the working logic is to empty the crucible on the left, push the furnace cavity on the left, raise the hanging balance, heat and purify the muffle furnace to constant weight, drop the balance, push the right side to the starting position, put the concentrated liquid and cleaning liquid in the evaporation zone into the crucible, push the furnace cavity on the left, raise the hanging balance, heat the muffle furnace (drive out acid and ashing) to constant weight, drop the balance, push the right side to the starting position, and wait for it to cool.

Claims

1. A water sample automatic concentration and ashing device, comprising a microwave evaporator (1) and a muffle furnace (16), characterized in that: The top of the microwave evaporator (1) is fixedly connected to a motor (2), the end of the output shaft of the motor (2) is fixedly connected to a spray barrel (3), the microwave evaporator (1) is fixedly connected to an infrared thermometer (4), an evaporating dish (5) is installed in the microwave evaporator (1), the bottom of the evaporating dish (5) is fixedly connected to a tow-type weighing balance (6), the tow-type weighing balance (6) is installed on the microwave evaporator (1), one side of the microwave evaporator (1) is provided with a water adding mechanism, one side of the microwave evaporator (1) is provided with a water adding mechanism, the evaporating dish (5) is provided with a A conveying mechanism connected to each other, slide rails (17) are installed on both sides of the muffle furnace (16), a porcelain evaporating dish (15) is placed on the left slide rail (17), a left push rod (14) is fixedly connected to the left slide rail (17), and a right push rod (18) is fixedly connected to the right slide rail (17), a weighing support plate (19) is provided in the muffle furnace (16), the weighing support plate (19) is fixedly connected to a hanging weighing balance (20), the hanging weighing balance (20) is installed with a lifting motor (21), and the lifting motor (21) is installed on the top of the muffle furnace (16).

2. The automatic water sample concentration and ashing device according to claim 1, characterized in that: The water and acid adding mechanism comprises an acid cup (9) and a deionized water cup (10) arranged on the right side of the microwave evaporator (1); a first suction pipe is installed on the acid cup (9); a second suction pipe is installed on the deionized water cup (10); the first suction pipe is fixedly connected to a first peristaltic pump; the second suction pipe is fixedly connected to a second peristaltic pump; the first peristaltic pump and the second peristaltic pump are commonly fixedly connected to an acid / water pipe (11); one end of the acid / water pipe (11) is connected to a spray barrel (3).

3. The automatic water sample concentration and ashing device according to claim 1, characterized in that: The water adding mechanism comprises a water sample cup (8) arranged on the right side of the microwave evaporator (1); a third suction pipe is installed on the water sample cup (8); the third suction pipe is fixedly connected to a third peristaltic pump; the third peristaltic pump is fixedly connected to a water sample tube (12); one end of the water sample tube (12) is arranged above the evaporating dish (5).

4. The water sample automatic concentration and ashing device according to claim 1, characterized in that: The conveying mechanism comprises a water outlet pipe (7) fixedly connected to the evaporating dish (5), the water outlet pipe (7) being fixedly connected to a fourth peristaltic pump, the fourth peristaltic pump being fixedly connected to a downpipe (13), and the downpipe (13) being arranged above the porcelain evaporating dish (15).

5. The automatic water sample concentration and ashing device according to claim 1, characterized in that: The muffle furnace (16) is provided with a muffle furnace door (22).

6. The water sample automatic concentration and ashing device according to claim 1, characterized in that: The microwave evaporator (1) is provided with an evaporator door (24).

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