JP2003240625A - Sample measuring device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sample measuring device capable of measuring the mass of an evaporating vaporizing component in a sample such as soil, continuously and accurately in each classified kind. <P>SOLUTION: This sample measuring device 1 is equipped with an electronic force balance (mass measuring device) 3 installed on a pedestal 2, a closed container-shaped material heating box 4 having an intake port 4a and an exhaust port 4b and loaded on the electronic force balance 3, a sample container 5 supported in the material heating box 4 and provided with a stirring device 13 for bringing the air introduced into the material heating box 4 from the intake port 4a into contact with a sample (specimen) including oil or the like stored inside, an air blower 6 loaded on the electronic force balance 3, for sending the air into the material heating box 4 through the intake port 4a, an air heater 7 for heating the air sent from the air blower 6 into the material heating box 4, and a deodorization furnace (combustion furnace) 8 installed on the pedestal 2, for burning oil or the like in exhaust gas discharged from the exhaust port 4b of the material heating box 4. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to moisture and oil content in measured materials such as aggregate (crushed stone, sand, etc.), soil (mud, clay, etc.), industrial by-products (sludge, sludge, etc.), Organic substances and other substances that evaporate and evaporate when dried (hereinafter,
At least one of these is referred to as an "evaporative vaporization component") and specifically to a sample measuring device for continuously measuring the weight by combining a dry heating device and a weighing device. belongs to.

[0002]

2. Description of the Related Art Conventionally, when measuring the weight of water, oil, organic matter, etc. contained in samples of aggregate, soil, industrial by-products, etc., the sample is put in a vat or the like and weighed by a weighing device,
It was placed in a constant temperature dryer, a heater, etc., dried and heated to reach a predetermined temperature completely, and then a sample was taken out and weighed by a weighing device.

[0003]

However, the conventional method has the following problems. First, because it was not possible to measure the weight of the measured material at each elapsed time,
It was difficult to understand at what point in time the water, oil, organic matter, etc. in the measured material were completely vaporized and separated and removed from the measured material. Secondly, it was not easy to stir and mix the material to be measured placed in a constant temperature dryer, a heater, etc. until the drying and heating were completed, so water, oil, organic matter, etc. were completely evaporated and vaporized. It took a long time to be separated and removed from the material to be measured (the measurement was limited to once a day). Thirdly, although it was possible to change the set temperature of the constant temperature dryer, the heater, etc., it was not possible to measure the weight of the measured material for each set temperature, so the oil content in the measured material, It was difficult to estimate the type of organic matter.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a sample measuring device capable of continuously and accurately measuring the weight of evaporative components in a sample for each set temperature (variable). And

[0005]

The present invention is characterized by the following points in order to solve the above problems. That is,
The sample measuring device according to claim 1 is provided with a mass measuring device, an air supply port for introducing heated air and an exhaust port for discharging exhaust air, and has a closed container shape mounted on a weighing pan of the mass measuring device. A material heating box, a sample container supported in the material heating box, for bringing heated air introduced into the material heating box from the air supply port into contact with a sample containing an evaporative vaporizing component contained therein, It is characterized in that it is provided with a blower for sending heated air into the material heating box through the air port, and an air heater for heating the air sent from the blower into the material heating box.

A sample measuring device according to a second aspect is the first aspect.
In the sample measuring device described in (1), the blower and the air heater are mounted on a weighing pan of the mass measuring device.

The sample measuring device according to claim 3 is the same as claim 1.
Alternatively, in the sample measuring device described in 2, the air heater is provided at the other end of the air heating tube whose one end is connected to the air supply port, and the blower is provided at the other end of the heating tube via the blower tube. Characterized by being informed.

A sample measuring device according to a fourth aspect is the third aspect.
In the sample measuring device described in [1], the air heater can set the heating temperature of air to 50 to 750 [deg.] C., and the blower tube has an opening / closing control valve for adjusting the amount of air blown from the blower to the heating tube. Is provided.

A sample measuring device according to a fifth aspect is the first aspect.
In the sample measuring device according to any one of 1 to 4, the air heater is an electric heating type heater.

A sample measuring device according to a sixth aspect is the first aspect.
The sample measuring device according to any one of items 1 to 5 is characterized in that the sample container is provided with a stirring device for stirring the sample contained therein.

A sample measuring device according to a seventh aspect is the first aspect.
In the sample measuring device according to any one of 1 to 6, the sample container is provided with a cylindrical member for guiding the heated air introduced into the material heating box from the lower part to the upper part at the center thereof, and A hot air cap for guiding the heated air contained in the cylindrical member to the bottom side in the sample container is placed on the upper end of the cylindrical member.

The sample measuring device according to claim 8 is the same as claim 1.
In the sample measuring device according to any one of 1 to 7, the material heating box is provided with a heat-resistant filter inside the exhaust port for collecting dust in the exhaust gas discharged from the material heating box. It has a feature.

A sample measuring device according to a ninth aspect is the first aspect.
In the sample measuring device according to any one of 1 to 8, the material heating box includes a lower case having an air supply port, an exhaust port, and an upper lid openably and closably attached to an upper part of the lower case. The sample container is supported by the lower case.

A sample measuring device according to a tenth aspect of the present invention is the sample measuring device according to any one of the first to ninth aspects, in which the exhaust flue provided in the material heating box is connected to the exhaust gas discharged from the exhaust port. It is characterized in that a combustion furnace for burning the vaporized vaporized components contained therein is connected in a non-contact manner.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION A sample measuring device according to an embodiment of the present invention will be described below with reference to FIGS. Figure 1
In the above, 1 is a sample measuring device according to an embodiment of the present invention. This sample measuring device 1 includes an electronic balance (mass measuring device) 3 installed on one side (right side in FIGS. 1 and 3) of a gantry 2 having a rectangular plane, and an air supply port for introducing heated air. 4a and an exhaust port 4b for leading out exhaust gas, and a material heating box 4 in the form of a closed container mounted on the electronic balance 3, and a material heating box 4 supported in the material heating box 4 to heat the material from the air supply port 4a. A sample container 5 for bringing the heated air introduced into the box 4 into contact with a sample (sample) such as soil containing oil (evaporative component) contained therein, and the material heating box 4 via the air supply port 4a. Above the other side of the gantry 2 (the left side in FIGS. 1 and 3), the blower 6 that sends heated air into the inside, the air heater 7 that heats the air sent from the blower 6 into the material heating box 4, Installed, exhaust port of the material heating box 4 Deodorizing furnace for combusting the vaporized gas of such oil in discharged exhaust gas from b and a (combustion furnace) 8.

The electronic balance 3 has, for example, a maximum weight of 15
It consists of a precision weighing type electronic balance capable of displaying 0 kg and a minimum weighing amount of 1 g, and is fixed and installed on the pedestal 2 through the leg portions 3b with the weighing plate 3a having a flat rectangular shape in a horizontal state. However, it consists of a display unit that digitally displays and records the weighing value, an operation unit that inputs and sets various condition numerical values and operates the balance, and a control unit that stores the weighing value and performs necessary calculations based on it. It is electrically connected to a control device that stores a measured value for each elapsed time from the start of weighing.

The material heating box 4 has a cylindrical lower case 4c having an open top and a lower case 4c.
A detachable (openable / closable) upper part is provided with a flat cylindrical upper lid 4d with an upper part closed, and the axial direction is perpendicular to the upper surface of the weighing pan 3a of the electronic balance 3, Placed on the weighing pan 3a via the weighing common base 9,
It is fixed. A refractory lining 10 is applied to the inner wall surfaces of the lower case 4c and the upper lid 4d. And
The air supply port 4a is an end portion of the lower case 4c (see FIG. 1,
3 is opened toward the one end side near the bottom of the right end portion in FIG. 3, and the exhaust port 4b is provided at the other end portion of the upper lid 4d (FIG. 1,
It opens toward the upper side at the left end portion in FIG. 3. A block-shaped heat-resistant filter 11 made of rock wool is provided inside the upper lid 4d at a position corresponding to the exhaust port 4b.

The sample container 5 comprises a cylindrical container body 5a having an open upper part, and a flange 5b provided on the outer periphery of the upper end thereof. The flange 5b is placed on the upper end of the lower case 4c to heat the material. It is supported inside the box 4 and is fixed by an upper lid 4d. The container body 5
At the center of a, a cylindrical member 5e, which communicates the inside with a hole 5d formed in the bottom portion 5c, is vertically extended upward from the bottom portion 5c. A plurality of vertically elongated slits 5f penetrating the peripheral wall of the cylindrical member 5e are formed at predetermined intervals in the circumferential direction, and have an upwardly convex spherical closing portion 12a. The cylindrical hot air cap 12 has a predetermined gap E between the inner peripheral surface thereof and the outer peripheral surface of the cylindrical member 5e, and a gap between the hot air cap 12 and the bottom portion 5c of the material heating box 4, The cylindrical member 5
It is mounted on the upper end of e. An annular sample storage portion G surrounded by the container body 5a, the cylindrical member 5e, and the bottom portion 5c.
Are communicated with the inside of the cylindrical member 5e through the slit 5f and the gap E. Instead of providing the slit 5f in the cylindrical member 5e, a support member that abuts the top of the cylindrical member 5e with a space communicating the gap E with the inside of the cylindrical member 5e inside the upper part of the hot air cap 12 May be provided.

The sample container 5 is provided with a stirring device 13 for stirring the sample contained in the sample container G. The stirring device 13 includes an electric motor with a speed reducer (rotary drive device) 15 which is fixed to the upper part of the upper lid 4d through a holder 14 and is capable of continuously variable speed, and an electric motor 15 with a speed reducer.
A stirring shaft 16 which is connected to the output shaft of the stirring shaft 16 and which penetrates the upper lid 4d and rotates around a vertical axis extending to a position above the center of the container body 5a, and is connected to a lower end portion of the stirring shaft 16.
A plurality of stirring arms 17 inserted into the sample storage portion G, and a stirring blade 18 provided at the lower end of each stirring arm 17 with the lower end portion being close to the bottom portion 5c of the container body 5a are provided. There is. Stirring shaft 1 in the upper lid 4d
A gland packing 16a is attached to the penetrating portion of 6.

The blower 6 has a vibration-proof rubber 1 at the bottom.
The electronic device is fixed to the rear end portion (the right end portion in FIG. 2 and the upper end portion in FIG. 3) at one end side (the right end side in FIGS. 1 and 3) of the weighing common base 9 via 9 (see FIG. 2). The blower tube 20 is supported by the weighing pan 3a of the balance 3 and has a blower opening 6a bent upward and having flexibility.
The heating tube 2 fixed to the front end portion on one end side of the weighing common base 9 and erected on the weighing dish 3a by
It is connected to the upper part of 1.

An open / close control valve 20a, which is a ball valve, is provided near the communicating portion of the blower tube 20 with the heating tube 21.
The lower end portion is connected to the upper end of the L-shaped bent air inlet pipe 22 which is fixed to the lower case 4c and communicates with the air supply port 4a through the bent pipe 21a, thereby heating the material. It is connected to the inside of the lower part of the box 4. A high temperature heat insulating material 21 a is wound around the heating tube 21, and an inner wall surface of the air inlet tube 22 is lined with a heat resistant material.

The air heater 7 is attached to the upper end of the heating tube 21 via a flange 21b, and includes an electric heating type heater having an electric heating element inserted therein, a hot air temperature sensor, and a heater overheat detecting sensor. Then, by turning on and off the amount of electric power supplied to the electric heating element, the heating tube 21 is passed from the blower 6 through the blower tube 20.
The air supplied to the inside can be arbitrarily heated and adjusted within the range of 50 to 750 ° C., and is electrically connected to the control device (not shown). This allows
Blower 6 to blower tube 20, heating tube 2
1. The air supplied to the material heating box 4 via the bending pipe 21a, the air inlet pipe 22, and the air supply port 4a is heated.

The deodorizing furnace 8 has a funnel-shaped bottom 8b and a conical ceiling 8c at the lower end and the upper end of a cylindrical body 8a, and the bottom 8b is attached to a support member 2a fixed to the mount 2. The furnace body 8d supported vertically and provided, the chimney 23 connected to the top of the ceiling 8c, and the furnace body 8
An exhaust gas introduction port 8e provided in the side wall portion below the body part 8a of d toward the tangential direction of the inner circumference of the body part 8a, and the exhaust gas introduction port 8
The burner 24 is fixed to a burner mounting portion 8f provided at a position slightly lower than the exhaust introduction port 8e away from the inner peripheral direction from the e, and a burner 24 having its tip end exposed inside the body portion 8a.

An L-shaped bent exhaust outlet pipe (exhaust flue) 26 fixedly provided on the upper surface of the material heating box 4 and connected to the exhaust port 4b is a connecting pipe ( It communicates with the exhaust introduction pipe 25 attached to the exhaust introduction port 8e via the exhaust flue 27. The tip end side of the communication pipe 27 is inserted inside the exhaust introduction pipe 25 so as to be movable in the diametrical direction and the axial direction with respect to the exhaust introduction pipe 25. The tubes 25 and 27 are designed not to contact each other.

The furnace body 8d and the exhaust outlet pipe 2
Refractory linings 8g and 26a are provided on the inside of 6, respectively, and a dust outlet 8h is provided at the bottom end of the bottom 8b of the furnace body 8d to separate it from the exhaust gas introduced into the furnace body 8d. The dust can also be discharged and collected by removing the cover plate 8i and weighed. Further, a temperature sensor 28 having a detection portion facing the exhaust passage is attached to the exhaust outlet pipe 26 so that the temperature of the exhaust gas discharged from the material heating box 4 is input to the control device (not shown). It has become.

Next, with reference to FIG. 4, an example of a method for measuring water content, oil content, etc. (evaporative vaporized components) in a sample together with the operation of the sample measuring apparatus 1 having the above-described configuration, the following steps (1) to It will be described in accordance with (10). (1) After confirming that the sample container 5 is free of deposits, the weighing common base 9 mounted on the weighing pan 3a of the electronic balance 3, the material heating box 4, the sample container 5, the stirring device 13, the blower 6, Electric heating type heater 7, blower tube 20,
The mass M1 of the tare of the entire apparatus such as the heating tube 21 is measured by the electronic balance 3 in advance and recorded. (2) A sample (soil) of soil containing oil or the like that has been collected in advance and hermetically stored in the sample container 5 is measured, and the mass M2 of the entire apparatus at room temperature is measured by the electronic balance 3. The difference between the mass M2 and the mass M1 of the tare (M2-M
1) is obtained and recorded as the mass W1 of the sample at room temperature.

(3) Ignition of the burner 24 of the deodorizing furnace 8,
The inside of the furnace body 8d of the deodorizing furnace 8 is preheated by burning. (4) A temperature indicating controller provided in the control device (not shown) and connected to the air heater 7 is set to 100 ° C. to operate the blower 6 and the air heater 7
Operate. (5) The stirring device 1 is operated by operating the electric motor 15 with a reducer.
3 is rotated at low speed, and the sample in the sample container 5 is stirred.

As described above, the air sucked by the blower 6 enters the heating tube 21 through the blower tube 20, and the air heater 7 sets the temperature t1 (100 ° C.).
After being heated to 1, the material is supplied into the material heating box 4 through the bending pipe 21a, the air inlet pipe 22, and the air supply port 4a. The heated air supplied into the material heating box 4 is guided in the cylindrical member 5e of the sample container 5 and rises, enters the hot air cap 12 through the slit 5f and is inverted, passes through the gap E, and passes through the sample container G. Is introduced into the bottom of the sample container G, and the sample is uniformly agitated in the sample container G to repeatedly expose the surface from the lower part thereof, so that the sample is uniformly and well contacted with heated air to be heated and heated,
Moisture contained therein and volatile substances such as oil are rapidly and effectively vaporized and vaporized.

Then, the heated air containing vaporized and vaporized water, oil, dust, etc. is passed through the heat resistant filter 11 to remove the dust, and then the exhaust outlet 4b, the exhaust outlet pipe 26, the communication pipe 27, the exhaust introduction pipe. 25 and the exhaust gas introduction port 8e are introduced into the furnace body 8d of the deodorizing furnace 8, and the oil and the like vaporized by the burner 24 are completely burned. This allows
It is possible to effectively prevent the work environment from being contaminated by air containing oil and the like during the measurement work by the sample measuring device 1.

Since the exhaust gas introduced into the furnace body 8d is introduced from the exhaust gas inlet port 8e in the tangential direction of the furnace body 8d, the dust that cannot be completely removed by the heat-resistant filter 11 due to the centrifugal dust collection action. If so, it is removed efficiently. Therefore, only clean air from which oil and dust have been removed is discharged from the chimney 23 provided at the upper part of the furnace body 8a. The dust that has fallen onto the bottom 8b of the furnace body 8d can be taken out from the discharge port 8h by weighing off the lid plate 8i and weighed.

(6) As described above, the sample container 5
When the sample inside is heated to the set temperature t1 (100 ° C.) by the heated air introduced into the material heating box 4, from the measured value of the mass M2 of the entire device by the electronic balance 3 from the start of heating the sample. The obtained sample mass W and elapsed time T are monitored by the control device, and as shown in FIG. 4, the measured value W1 of the mass W at room temperature decreases to a constant value W2 and the mass does not decrease. When the heating is continued for a fixed time (heating holding time, about 2 to 5 min) T0, the constant value W2 is set as the measured value W2 of the mass W of the sample when heated at the set temperature t1, and the elapsed time T1 required for heating is set.
Record and store with. (7) Next, the temperature indicator controller is set to 200 ° C., the air heater 7 is operated to heat the sample in the sample container 5 in the same manner as described above, and the mass M2 of the entire device is adjusted. The measured value W3 and the elapsed time T2 in the state where the mass W of the sample obtained from the measured value does not decrease are recorded and stored.

(8) Sequentially, the temperature indicating controller is set to set temperatures t3 (300 ° C.), t4 (400 ° C.), ..., And the measured value W4 in the state where the mass W of the sample is not reduced. , W5, ... and elapsed time T3, T4, ...
・ Record and memorize. At this time, the temperature of the exhaust gas discharged from the inside of the material heating box 4 measured by the temperature sensor 28 is confirmed with a temperature indicating controller, and the temperature of the heated air supplied into the material heating box 4 reaches the set temperature. If not, the opening amount of the opening / closing control valve 20a of the blower tube 20 may be adjusted to adjust the amount of air blown from the blower 6 into the heating tube 21.

(9) As described above, the heated air is supplied into the material heating box 4 to raise the temperature of the sample in the sample container 5 stepwise, and the measured value of the mass M2 of the entire instrument at each set temperature. To the measured value W of the sample mass W
1, W2, W3, ... Then, each set temperature t
1, t2, t3, ... The difference in the mass W of the sample at the start of measurement and at the end of measurement (W1-W2, W2-
W3, W3-W4, ...) From each set temperature t1, t
The mass of each type of water, oil, etc., contained in the sample distilled at 2, t3, ... Is calculated and compared with the wet mass W1 of the sample at room temperature, The content ratio of is calculated.

That is, the standard distillation temperature (JI
SK-2254), moisture at 100 ° C (distillation of 25% gasoline), light oil at 200 ° C (gasoline, kerosene), medium oil at 300 ° C (light oil, heavy oil A), heavy at 400 ° C. Since oil (C heavy oil, lubricating oil) will be distilled respectively, in the example shown in FIG. 4, the water content (including some gasoline) is (600 g / 3000 g) × 100 = 20.
%, Light oil is (30 g / 3000 g) × 100 = 1%,
Medium oil is (30 g / 3000 g) × 100 = 1%, heavy oil is (10 g / 3000 g) × 100 = 0.33%, and the total oil content is {(30 + 30 + 10) g / 3000.
g} × 100 = 2.33%. And heating temperature 4
At 50 ° C., since the measured value of the mass W of the sample does not change, it can be determined that the oil content in the sample has been completely removed. In addition, when it is desired to measure the organic matter (residual carbon content) (evaporative vaporization component) in the sample, the heating temperature of air is gradually increased to a maximum of 750 ° C. and the same measurement work is performed. Further, the time required to heat the sample at each set temperature t1, t2, t3, ... (Including the heating holding time T0) From the measured values of T1, T2, T3 ,. Confirm the heating time required for them to evaporate, vaporize, and be completely separated and removed from the sample depending on their contents.

(10) When the measurement of water content, oil content, etc. in the sample by the sample measuring apparatus 1 is completed, the deodorizing furnace 8
Of the burner 24, the operation of the air heater 7 and the operation of the stirrer 13 are stopped, the blower 6 is temporarily operated to blow air to the material heating box 4, and the sample container 5 is cooled before the sample container 5 is cooled. Is taken out of the material heating box 4, and the measured sample is discharged from the sample container 5. After that, if necessary, the next sample is put in the sample container 5 in the room temperature state, and the same measurement is performed. In this case, as a precaution, the tare mass M1 of the entire device is measured again in advance.

According to the sample measuring apparatus 1 according to the above-described embodiment, the air supply port 4a and the exhaust port 4b are provided, and the upper case 4c is provided with the upper lid 4d so that it can be opened and closed. And a sample container 5 supported in the material heating box 4 for bringing heated air introduced into the material heating box 4 from the air supply port 4a into contact with a sample such as soil containing oil and the like stored therein. A blower 6 which is connected to the air supply port via a blower tube 20 and a heating tube 21 and sends heated air into the material heating box 4, and a blower 6 provided in the heating tube to send the air into the material heating box 4. Since the air heater 7 for heating the air is mounted on the weighing pan 3a of the electronic balance 3, the air heater 7 heats the blower 6 to heat the air.
The sample contained in the sample container 5 in the material heating box 4 is heated by the heated air supplied by the above, and moisture, oil, etc. in the sample can be evaporated and vaporized to be reliably separated from the sample. Therefore, by gradually setting the temperature of the heated air supplied to the material heating box 4 by the air heater 7, the mass of water, oil, etc. can be continuously classified by type according to the measured value by the electronic balance 3 at each set temperature. It is possible to easily and accurately measure the content and to easily confirm the content ratio in the sample.

As a result, when operating the soil purifying device for purifying contaminated soil by heating contaminated soil with oil etc. and burning vaporized oil, etc.,
The contaminated soil to be treated is sampled, the content ratio of each type of water, oil, etc. in the contaminated soil is confirmed by using the sample measuring device 1 according to the embodiment, and the content ratio of the water, oil, etc. is confirmed. Accordingly, by appropriately setting the operating conditions of the soil purifying device, the soil purifying device can be efficiently operated.

Further, according to the sample measuring apparatus 1 according to the above-mentioned embodiment, the material heating box 4, the sample container 5, the blower 6, the air heater 7, are placed on the weighing pan 3a of the electronic balance 3.
Since the whole apparatus such as the stirring device 13, the blower tube 20, the heating tube 21 and the like involved in weighing the sample is mounted, there is no fear that a force that interferes with the weighing of the electronic balance 3 acts, and The water content, oil content, etc. in the sample can be measured more accurately by the balance 3.

Further, from the blower 6 to the opening / closing control valve 20a
The air sent to the heating tube 21 through the air blowing tube 20 provided with is heated by the air heater 7 whose heating temperature can be set to 50 to 750 ° C. and supplied to the material heating box 4. Therefore, the uniform heating air rectified through the heating tube 21 is used as the material heating box 4
Can be supplied to the heating air, and heating air having a wide temperature range can be arbitrarily obtained by the air heater 7, and the amount of air blown from the blower to the heating tube can be adjusted by the opening degree of the opening / closing control valve. The temperature can be adjusted. This enables stepwise heating of a sample containing water, light oil with low vaporization temperature to heavy oil with high vaporization temperature, and residual carbon content, and efficiently and reliably evaporates the water content, oil content, etc. for each type. , Can be vaporized and separated from the sample.

Further, the material heating box 4 is the lower case 4
An upper lid 4d that can be opened and closed is provided on c to form a two-part structure,
Since the heat-resistant filter 11 is provided inside the exhaust port 4b of the upper lid 4d, the material heating box 4
The dust in the exhaust gas discharged from the device is reliably collected by the heat-resistant filter 11, and only the evaporated and vaporized water, oil, etc. can be discharged from the material heating box 4, so that the water content in the sample measuring device 1, It is possible to accurately measure oil content and the like. Further, the upper lid 4d of the material heating box 4 is opened to attach / detach the sample container 5 to / from the lower case 4c,
Since the heat resistant filter 11 can be attached to and detached from the upper lid 4d, the sample can be stored in and taken out from the sample container.
Operations such as cleaning of the sample container, purification of the heat-resistant filter 11, and replacement can be easily performed as necessary.

In the sample measuring device 1 according to the above-mentioned embodiment, the entire equipment involved in weighing the sample is mounted on the weighing pan 3a of the electronic balance 3, but the present invention is not limited to this, and the blower is not limited to this. 6, air heater 7, blower tube 2
0 or at least one of the heating tubes 21 may be installed outside the weighing pan 3a of the electronic balance 3. In this case, the connecting portion for connecting the device mounted on the weighing pan 3a and the device installed outside is connected to each other via a flexible member or the like so that the two devices can move relative to each other. It is necessary to make sure that weighing is not hindered.

Further, in the sample measuring device 1 according to the above-mentioned embodiment, since the electric heating type heater is used as the air heating device 7, the material heating box 4 is heated by the air heating device 7 itself.
No substance that contaminates the heated air to be supplied to is generated, it is preferable that the accurate mass of water, oil, etc. in the sample can be reliably measured, but the present invention is not limited to this. A gas burner can also be used. Further, in the above description, the case where the sample of the soil containing water, oil, and organic matter as the substance (evaporative vaporization component) that evaporates by drying and heating is used as the measurement target is not limited to this, but includes mercury and the like. A sample of contaminated soil may be used as the measurement target.

[0043]

As described above, the present invention has the following excellent effects. According to the sample measuring device according to claim 1, the heating air heated by the air heater is supplied by the blower into the material heating box mounted on the mass measuring device, and the heating air is supported in the material heating box. Since the sample in the sample container thus heated is heated and the vaporized components in the sample are vaporized and separated from the sample,
By setting the temperature of the heated air supplied to the material heating box stepwise by the air heater, the mass of the evaporative vaporization component can be continuously and accurately measured according to the type by the weighing value of the mass measuring instrument at each set temperature. However, the content ratios in those samples can be easily confirmed. As a result, when operating a soil purification device that purifies contaminated soil by heating contaminated soil with oil, etc. and burning evaporated and vaporized oil, etc., the contaminated soil to be treated is used as the material to be measured in advance. Sampling, the water content in it, the content ratio by type such as oil content is confirmed by using the sample measuring device according to the present invention, the operating conditions of the soil purification apparatus according to the water content, the content ratio of oil content, etc. By setting it appropriately,
The soil purification device can be operated efficiently.

According to the sample measuring device of the second aspect, since the entire device relating to weighing of the sample is mounted on the mass measuring instrument, there is no fear that a force that hinders the weighing of the mass measuring instrument acts. Further, the evaporative vaporization component in the sample can be measured more accurately by the mass measuring device.

According to the sample measuring device of the third aspect, the air from the blower can be heated by the air heater and supplied to the material heating box as the uniform heated air rectified through the heating tube.

According to the sample measuring device of the fourth aspect, the heated air having a wide temperature range can be obtained by the air heater, and the temperature can be adjusted by the amount of air blown from the blower, so that the moisture and vaporization temperature are low. From light oil to heavy oil with high vaporization temperature,
It is possible to heat a sample including organic matter (residual carbon content) stepwise, and efficiently evaporate and vaporize the vaporized components for each type to separate them from the sample.

According to the sample measuring device of the fifth aspect, since the air heater is an electrothermal heater, a substance contaminating the heated air supplied to the material heating box may be generated by the air heater itself. Therefore, the accurate mass of the evaporative vaporization component in the sample can be reliably measured.

According to the sample measuring device of the sixth aspect, the sample contained in the sample container can be stirred by the stirring device. Therefore, the sample whose surface is exposed by this stirring is introduced into the material heating box. The heated heated air can be evenly contacted, and the vaporized and vaporized components in the sample can be efficiently vaporized and vaporized.

According to the sample measuring device of the seventh aspect, the heated air in the material heating box can be uniformly guided to the lower portion of the sample contained in the sample container by the cylindrical member and the hot air cap. Further, the heated air can be brought into good contact with the sample, and the vaporized and vaporized components in the sample can be effectively vaporized and vaporized.

According to the sample measuring device of the eighth aspect, the dust in the exhaust gas discharged from the material heating box is collected by the heat resistant filter, and only the evaporated and vaporized vaporized components are discharged from the material heating box. Therefore, it is possible to accurately measure the evaporative vaporization component in the sample measuring device.

According to the sample measuring device of the ninth aspect, since the upper lid of the material heating box can be opened and the sample container can be attached to and detached from the lower case, and the heat-resistant filter can be attached to and detached from the upper lid. It is possible to easily carry out operations such as storage and removal of the sample, cleaning of the sample container, purification of the heat resistant filter, and replacement.

According to the sample measuring device of the tenth aspect,
Since the vaporized evaporative vaporized components in the exhaust gas discharged from the exhaust port of the material heating box can be completely burned in the combustion furnace, during the measurement work by the sample measuring device, the working environment is changed by the air containing the vaporized vaporized components. It can be effectively prevented from being contaminated.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a sample measuring device according to the present invention in a partial cross section.

FIG. 2 is also a side surface.

FIG. 3 is a plan view showing a part of the same in section.

FIG. 4 is an explanatory diagram showing an example of a heating temperature of a sample, a heating time, and a state of changes in its weighing value.

[Explanation of symbols]

1 Sample measuring device 2 mounts 3 Electronic balance (mass measuring device) 3a weighing dish 4 Material heating box 4a Air supply port 4b exhaust port 5 sample containers 6 blower 7 Air heater 8 Deodorization furnace (combustion furnace) 11 Heat-resistant filter 12 hot air cap 13 Stirrer 15 Electric motor with reduction gear (rotary drive device) 19 Anti-vibration rubber 20 blower tube 20a Open / close control valve 21 heating tube 23 chimney 24 burners 28 Temperature sensor E gap G sample storage

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Haruyuki Hirano             1-9-3 Kamatahonmachi, Ota-ku, Tokyo Stock             Niigata Ironworks Engineering Center             -In

Claims (10)

[Claims] 1. A mass measuring device, an air supply port for introducing heated air and an exhaust port for discharging exhaust air, and a closed container-shaped material heating box mounted on a weighing pan of the mass measuring device, A sample container, which is supported in the material heating box and which brings heated air introduced into the material heating box from the air supply port into contact with a sample containing an evaporative vaporizing component housed therein, and the air supply port A sample measuring device comprising: a blower for sending heated air into a material heating box; and an air heater for heating air sent from the blower into the material heating box. 2. The blower and the air heater are mounted on a weighing pan of the mass measuring device.
The sample measuring device described in 1. 3. The air heater is provided at the other end of the air heating tube having one end connected to the air supply port, and the blower is connected to the other end of the heating tube via the blower tube. The sample measuring device according to claim 1 or 2, characterized in that. 4. The air heater controls the heating temperature of air to 50.
The temperature can be set to ˜750 ° C., and the blower tube is provided with an opening / closing control valve that controls the amount of air blown from the blower to the heating tube. Sample measuring device. 5. The sample measuring device according to claim 1, wherein the air heater is an electrothermal heater. 6. The sample measuring device according to claim 1, wherein the sample container is provided with a stirring device for stirring the sample contained therein. 7. The sample container has a central portion,
A cylindrical member for guiding the heated air introduced into the material heating box upward from the lower portion is provided,
The sample according to any one of claims 1 to 6, wherein a hot air cap that guides the heated air contained in the cylindrical member to the bottom side in the sample container is mounted on the upper end of the cylindrical member. measuring device. 8. The material heating box is provided with a heat-resistant filter inside the exhaust port thereof for collecting dust in the exhaust gas discharged from the material heating box. 7. The sample measuring device according to any one of 7. 9. The material heating box includes a lower case provided with the air supply port, an exhaust port provided with an upper lid openably and closably attached to an upper portion of the lower case, and the sample container The sample measuring device according to any one of claims 1 to 8, which is supported by the lower case. 10. A combustion furnace for burning vaporized evaporative components contained in the exhaust gas discharged from the exhaust port is connected to the exhaust flue provided in the material heating box in a non-contact manner. The sample measuring device according to any one of claims 1 to 9, wherein