Kiln for preparing sodium silicate

Abstract

The utility model relates to the technical field of sodium silicate production equipment, in particular to a kiln for preparing sodium silicate, which comprises a kiln body, a discharge port arranged on the front side of the kiln body, an exhaust port arranged on the rear side of the kiln body, and a heat exchanger, a water inlet pipe communicated with the liquid channel of the heat exchanger is arranged on the upper side of the heat exchanger, a breather pipe communicated with the liquid channel is arranged on the upper side of the heat exchanger, and a water outlet pipe communicated with the liquid channel is arranged on the lower side of the heat exchanger. The problem that in the prior art, heat in high-temperature waste gas exhausted by a kiln for preparing sodium silicate is not well utilized is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to sodium silicate production equipment technical field, concretely relates to a kiln for preparing sodium silicate. BACKGROUND

[0002] Sodium silicate, commonly known as soda ash, is an important chemical product, which is used for making laundry detergent, laundry liquid, paper and various daily necessities; in industry, dry method is usually used for production, the process is that quartz sand and soda ash are mixed in a certain proportion, then heated to about 1400 DEG C in a kiln, to generate molten sodium silicate, which is then cooled by water quenching, pressed into block and granular sodium silicate solid, wherein a large amount of heat is taken out of the reaction furnace along with the flue gas generated in the reaction process, so that the waste heat needs to be recovered and utilized while treating the flue gas, to improve the energy utilization rate and reduce energy waste. SUMMARY

[0003] The utility model discloses a kiln for preparing sodium silicate, which solves the problem that the heat in the high-temperature waste gas discharged by the kiln for preparing sodium silicate in the prior art is not utilized well.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme:

[0005] A kiln for preparing sodium silicate, comprising a kiln body, a discharge port provided on the front side of the kiln body, an exhaust port provided on the rear side of the kiln body, a heat exchanger, the exhaust port being connected to the airflow passage of the heat exchanger through an exhaust pipe, a water inlet pipe provided on the upper side of the heat exchanger and connected to the liquid passage of the heat exchanger, an air inlet pipe provided on the upper side of the heat exchanger and connected to the liquid passage, and a water outlet pipe provided on the lower side of the heat exchanger and connected to the liquid passage.

[0006] Further, a pressure relief valve is installed at the position of the exhaust port, a pressure cavity is provided in the pressure relief valve, an air inlet hole and an air outlet hole connected to the pressure cavity are respectively provided on the opposite sides of the pressure relief valve, the air inlet hole is connected to the inside of the kiln body, and the air outlet hole is connected to the exhaust pipe; a spring and a sealing block are provided in the pressure relief valve, the sealing block is attached to block the air inlet hole, and the end of the sealing block away from the air inlet hole is connected to the inner wall of the pressure relief valve at the position of the air outlet hole through the spring.

[0007] Further, the heat exchanger is sequentially provided with an air inlet cavity, a heat exchange cavity and an air outlet cavity from one end connected to the exhaust pipe to the other end, the airflow passage comprises a plurality of air pipes, the two ends of each air pipe are connected to the air inlet cavity and the air outlet cavity, and the water inlet pipe, the air inlet pipe and the water outlet pipe are all connected to the heat exchange cavity; the liquid passage is the heat exchange cavity.

[0008] Further, the water outlet pipe is connected with an insulation barrel at one end away from the heat exchanger, the first valve is arranged on the water outlet pipe, the second valve is arranged on the water inlet pipe, and the third valve is arranged on the air pipe.

[0009] Further, the heat exchange cavity is provided with a temperature sensor.

[0010] Further, the heat exchanger is provided with an exhaust pipe connected with the air outlet cavity at one end away from the air inlet pipe, and the exhaust pipe is provided with an exhaust fan.

[0011] Further, the air pipe is vertically arranged on the upper side of the heat exchanger and is connected with a transparent water tank at the upper end, and the transparent water tank is provided with an electronic liquid level meter.

[0012] Compared with the prior art, the heat exchanger can recover heat from high-temperature waste gas generated in the production of sodium silicate, heat the water in the heat exchanger by using the heat of the high-temperature waste gas, and use the heated hot water as domestic water or industrial water, thereby saving part of the energy consumed for heating water. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 It is a whole schematic view of the kiln for preparing sodium silicate.

[0014] Fig. 2 It is a schematic view of the heat exchanger of the kiln for preparing sodium silicate.

[0015] Fig. 3 It is a side sectional view of the kiln for preparing sodium silicate.

[0016] Fig. 4 It is a schematic view of the pressure relief valve of the kiln for preparing sodium silicate.

[0017] Icon: 1-kiln body, 2-discharge port, 3-exhaust port, 4-heat exchanger, 5-gas outlet pipe, 6-water inlet pipe, 7-ventilation pipe, 8-water outlet pipe, 9-pressure relief valve, 10-pressure chamber, 11-air inlet hole, 12-air outlet hole, 13-spring, 14-sealing block, 15-air inlet chamber, 16-heat exchange chamber, 17-air outlet chamber, 18-air pipe, 19-heat preservation barrel, 20-first valve, 21-second valve, 22-third valve, 23-temperature sensor, 24-exhaust pipe, 25-exhaust fan, 26-transparent water tank. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the utility model clearer, the utility model will be described in further detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and not to limit the utility model.

[0019] Figs. 1 to 4 The utility model discloses an embodiment.

[0020] Embodiment:

[0021] A kiln for preparing sodium silicate, comprising a kiln body 1, the front side of the kiln body 1 is provided with a discharge port 2, the rear side of the kiln body 1 is provided with an exhaust port 3, further comprising a heat exchanger 4, the exhaust port 3 is connected with the airflow passage of the heat exchanger 4 through a gas outlet pipe 5, the upper side of the heat exchanger 4 is provided with a water inlet pipe 6 connected with the liquid passage of the heat exchanger 4, the upper side of the heat exchanger 4 is provided with a ventilation pipe 7 connected with the liquid passage, and the lower side of the heat exchanger 4 is provided with a water outlet pipe 8 connected with the liquid passage. By arranging the heat exchanger 4, the high-temperature waste gas generated during the production of sodium silicate by the kiln body 1 can be used for heat recovery, and the heat of the high-temperature waste gas can be used to heat the water in the heat exchanger 4. The heated hot water can be used as domestic water or industrial water, saving part of the energy consumed for heating water. Water can be supplied into the heat exchanger 4 through the water inlet pipe 6, and the water outlet pipe 8 can be used to discharge the heated water. By arranging the ventilation pipe 7, since it takes a certain time to heat the water in the heat exchanger 4 to the required temperature, and to avoid cold water from entering during water discharge, the water is discharged first, and then water is supplied through the water inlet pipe 6. Therefore, air needs to be supplied into the heat exchanger 4 through the ventilation pipe 7 during water discharge to avoid water from being unable to be discharged. In addition, the ventilation pipe 7 is also needed to discharge the gas when the water is discharged and then supplied.

[0022] The position of the exhaust port 3 is provided with a pressure relief valve 9, the pressure relief valve 9 is provided with a pressure chamber 10, the opposite sides of the pressure relief valve 9 are respectively provided with an air inlet hole 11 and an air outlet hole 12 which are communicated with the pressure chamber 10, the air inlet hole 11 is communicated with the inside of the kiln body 1, and the air outlet hole 12 is communicated with the exhaust pipe 5; the pressure relief valve 9 is provided with a spring 13 and a sealing block 14, the sealing block 14 is attached to block the air inlet hole 11, and the end of the sealing block 14 away from the air inlet hole 11 is connected with the inner wall of the pressure relief valve 9 at the air outlet hole 12 through the spring 13. Since the kiln body 1 needs to maintain a slight positive pressure during the reaction, the exhaust port 3 is controlled by the pressure relief valve 9, so that the slight positive pressure in the kiln can be maintained. Through the spring 13 and the sealing block 14, the pressure in the kiln body 1 can be pushed to compress the spring 13 when the pressure exceeds the preset pressure by the elastic pressure of the spring 13, so that the gas in the kiln enters the pressure relief valve 9 through the air inlet hole 11, and then enters the exhaust pipe 5 through the air outlet hole 12 in the pressure relief valve 9.

[0023] The heat exchanger 4 is provided with an air inlet chamber 15, a heat exchange chamber 16 and an air outlet chamber 17 from one end connected with the exhaust pipe 24 to the other end in sequence, the airflow channel includes a plurality of air pipes 18, the two ends of the air pipe 18 are respectively communicated with the air inlet chamber 15 and the air outlet chamber 17, the water inlet pipe 6, the air pipe 7 and the water outlet pipe 8 are all communicated with the heat exchange chamber 16; the liquid channel is the heat exchange chamber 16. When the high-temperature exhaust gas enters the air inlet chamber 15, it is discharged by the air outlet chamber 17 after passing through the heat exchange chamber 16 through the air pipe 18. When passing through the heat exchange chamber 16, the pipe wall of the air pipe 18 exchanges heat with the water in the heat exchange chamber 16, transfers heat to the water in the heat exchange chamber 16 to heat the water, and cools the high-temperature exhaust gas.

[0024] The end of the water outlet pipe 8 away from the heat exchanger 4 is connected with a heat preservation barrel 19, the first valve 20 is arranged on the water outlet pipe 8, the second valve 21 is arranged on the water inlet pipe 6, and the third valve 22 is arranged on the air pipe 7. By arranging the heat preservation barrel 19, the heated water can be stored, and the heat loss during storage can be reduced. By arranging the first valve 20, the on-off of the water outlet pipe 8 can be controlled, and the first valve 20 is only opened when the water in the heat exchange chamber 16 needs to be heated to the appropriate temperature. By arranging the second valve 21, it only needs to be opened when water needs to be added, and the heat exchange chamber 16 is watered through the water inlet pipe 6. By arranging the third valve 22, the third valve 22 can be opened when water is added and drained, and the water is added and drained smoothly through the entry and exit of the gas.

[0025] The temperature sensor 23 is arranged in the heat exchange chamber 16. By arranging the temperature sensor 23, the water temperature in the heat exchange chamber 16 can be monitored.

[0026] The heat exchanger 4 is provided with an exhaust pipe 24 communicated with the exhaust cavity 17 at the end away from the air inlet pipe 18, and the exhaust pipe 24 is provided with an exhaust fan 25. By setting the exhaust pipe 24 and the exhaust fan 25, the cooled exhaust gas can be discharged.

[0027] The vent pipe 7 is vertically arranged at the upper side of the heat exchanger 4, and the upper end is connected with a transparent water tank 26; the transparent water tank 26 is provided with an electronic liquid level meter. By setting the transparent water tank 26, when the water is fully filled in the heat exchange cavity 16, the water will enter the transparent water tank 26 through the vent pipe 7, at this time, it represents that the water in the heat exchange cavity 16 is fully filled, and the second valve 21 can be closed. By setting the electronic liquid level meter, the water level in the transparent water tank 26 can be monitored.

[0028] Although the present application has been described with reference to a number of explanatory embodiments thereof, it should be understood that many other modifications and implementations would be apparent to those skilled in the art. More particularly, many variations and modifications would be possible in the component parts and / or arrangements of the subject combination layout within the scope of the present disclosure, the drawings and the claims. Other than the modifications and implementations already described, any additional uses of the subject combination layout would obviously be apparent to those skilled in the art.

Claims

1. A kiln for preparing sodium silicate, comprising a kiln body (1), a discharge port (2) is provided on the front side of the kiln body (1), and an exhaust port (3) is provided on the rear side of the kiln body (1), characterized in that, It also includes a heat exchanger (4), the exhaust port (3) is connected with the gas flow passage of the heat exchanger (4) through the gas outlet pipe (5), the upper side of the heat exchanger (4) is provided with the water inlet pipe (6) connected with the liquid passage of the heat exchanger (4), the upper side of the heat exchanger (4) is provided with the air pipe (7) connected with the liquid passage, and the lower side of the heat exchanger (4) is provided with the water outlet pipe (8) connected with the liquid passage.

2. A kiln for the production of sodium silicate according to claim 1, characterised in that: The position of the exhaust port (3) is provided with a pressure relief valve (9), the pressure relief valve (9) is provided with a pressure cavity (10) in the pressure relief valve (9), the opposite sides of the pressure relief valve (9) are respectively provided with an air inlet hole (11) and an air outlet hole (12) connected with the pressure cavity (10), the air inlet hole (11) is connected with the inside of the kiln body (1), and the air outlet hole (12) is connected with the gas outlet pipe (5); the pressure relief valve (9) is provided with a spring (13) and a sealing block (14), the sealing block (14) is attached to block the air inlet hole (11), and the end of the sealing block (14) away from the air inlet hole (11) is connected with the inner wall of the pressure relief valve (9) at the air outlet hole (12) through the spring (13).

3. A kiln for producing sodium silicate as claimed in claim 1, wherein: The heat exchanger (4) is provided with an air inlet cavity (15), a heat exchange cavity (16) and an air outlet cavity (17) from one end connected with the exhaust pipe (24) to the other end in sequence, the gas flow passage includes a plurality of air pipes (18), the two ends of the air pipe (18) are connected with the air inlet cavity (15) and the air outlet cavity (17) respectively, and the water inlet pipe (6), the air pipe (7) and the water outlet pipe (8) are all connected with the heat exchange cavity (16); the liquid passage is the heat exchange cavity (16).

4. A kiln for the production of sodium silicate as claimed in claim 3 wherein: The end of the water outlet pipe (8) away from the heat exchanger (4) is connected with a heat preservation barrel (19), the water inlet pipe (6) is provided with a second valve (21), the air pipe (7) is provided with a third valve (22).

5. A kiln for the production of sodium silicate according to claim 4, characterised in that: The heat exchange cavity (16) is provided with a temperature sensor (23).

6. A kiln for the production of sodium silicate according to claim 5, characterised in that: The end of the heat exchanger (4) away from the air inlet pipe (18) is provided with an exhaust pipe (24) connected with the air outlet cavity (17), and the exhaust pipe (24) is provided with an exhaust fan (25).

7. A kiln for the production of sodium silicate according to claim 6, characterised in that: The air pipe (7) is vertically arranged on the upper side of the heat exchanger (4) and connected with a transparent water tank (26) at the upper end, and the transparent water tank (26) is provided with an electronic liquid level meter.

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