CN212173622U

CN212173622U - Sealed high-temperature ash discharging device for gas system

Info

Publication number: CN212173622U
Application number: CN202020490110.1U
Authority: CN
Inventors: 丛培敏; 周璞
Original assignee: Shandong Province Metallurgical Engineering Co Ltd
Current assignee: Shandong Province Metallurgical Engineering Co Ltd
Priority date: 2020-04-07
Filing date: 2020-04-07
Publication date: 2020-12-18
Anticipated expiration: 2030-04-07

Abstract

The utility model belongs to the technical field of clean system is once reduced to non-blast furnace melting ironmaking technology coal gas, for a coal gas system is with sealed high temperature ash unloading device, including unloading grey buffer system, leading material level monitoring system, rearmounted material level monitoring system, pressure monitoring component, nitrogen gas sealing system, cooling system. The utility model is provided with a preposed material level monitoring system to monitor the material level in the upper part gas equipment; a post material level monitoring system is arranged to monitor the material level of the sealed intermediate bin; a nitrogen sealing system and a pressure monitoring element are arranged to ensure the sealing performance of the system; the coal gas leakage of 0 is ensured through the logic control of the ash discharge valve group. And a temperature monitoring system is arranged to judge the ash temperature in the sealed intermediate bin. And a cooling system is arranged to accelerate the collection of ash for rapid cooling. The utility model discloses not only can guarantee gas system's leakproofness when uninstalling high temperature ash, can cool off high temperature ash simultaneously.

Description

Sealed high-temperature ash discharging device for gas system

Technical Field

The utility model belongs to the technical field of a purification system of non-blast furnace ironmaking technology coal gas, concretely relates to coal gas system is with sealed high temperature ash unloading device.

Background

At present, only one smelting reduction iron-making production line is available in the world. During the operation of the smelting reduction iron-making production process, SRV furnace gas can be generated, the SRV furnace gas contains 12-24% of CO, the temperature of the furnace gas can reach 1650 ℃, and the dust content of the furnace gas is high>50g/Nm³And the pressure is 80kPa, in order to utilize the SRV coal gas, the high-temperature and high-dust coal gas is subjected to cooling and purification treatment through a coal gas primary purification system (comprising a vaporization flue system, a settling chamber system, a cyclone dust removal system, a waste heat boiler system and a coal gas washing system), and the temperature of deposited dust collected below each system is 400-600 ℃ on average. The ash with high temperature can not be directly treated at home at present, and the prior treatment method can only discharge the high-temperature ash onto the ground, cool the ash naturally when the temperature is low, and then treat the ash by manually loading the ash on a truck.

In the current engineering operation process, the bottom of a settling chamber system, a cyclone dust removal system and a waste heat boiler system is a measure considering direct discharging accumulated dust of an ash discharge resisting valve, and only one safety protection measure is considered for monitoring the material level of an ash hopper at the bottom of the system.

The prior ash discharging system has the following defects;

1. in actual operation, because the system gas is in positive pressure, once the material level monitoring is inaccurate or the operation of workers is improper, the system gas is easy to leak, and potential safety hazards are formed. Meanwhile, as the switch of the ash discharge valve needs a certain time, the selection is improper when ash is discharged, when a low material level signal is monitored, a signal for closing the ash discharge valve is sent again, if the material level is too fast to fall, the valve is not closed in time, gas leakage is easily caused, and potential safety hazards are also formed.

2. The current ash unloading mode is that high-temperature ash is directly unloaded to the ground, and when the ash is naturally cooled, the ash is manually treated, so that the time cost is increased, the expensive labor cost is also increased, and meanwhile, the dust pollution is caused when the ash is manually loaded, and the health of operators is also harmed.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems generated in the prior art, the utility model provides a sealed high-temperature ash discharging device for a gas system, which has the characteristics of gas leakage of 0, multiple safety and sealing guarantee measures. The device can realize cloud monitoring and full-automatic one-key operation ash discharge in the running process of the device, and has the characteristic of ash cooling effect.

In order to achieve the above object, the utility model provides a following technical scheme: a sealed high-temperature ash discharging device for a gas system comprises an ash discharging buffer system, a front material level monitoring system, a rear material level monitoring system, a pressure monitoring element, a nitrogen sealing system and a cooling system.

The preposed high material level switch and the preposed low material level switch are both arranged on an ash bucket of upper equipment (a settling chamber, a cyclone dust removal device and a waste heat boiler) and keep a certain vertical distance, and a first coal gas sealing guarantee measure is formed by monitoring the material level of the ash bucket of the upper equipment; the outlet of the ash bucket of the upper equipment (a settling chamber, a cyclone dust removal and a waste heat boiler) is sequentially connected with an ash discharge valve, a sealed middle bin and an ash discharge valve in series, and a rear high material level switch and a rear low material level switch are arranged on the sealed middle bin and keep a certain vertical distance; monitoring the material level of the sealed intermediate bin through a rear material level monitoring system to form a second coal gas sealing guarantee measure, and enabling the pressure of nitrogen in the sealed intermediate bin to be always higher than the pressure of coal gas by more than or equal to 5kPa through a nitrogen sealing system and a pressure monitoring element to form a third coal gas sealing guarantee measure; and the check valve is arranged on the nitrogen pipeline to prevent the gas from flowing back, and a sealing guarantee measure is also provided; through the logic control of the ash discharge valve group, the two ash discharge valves can not be opened simultaneously all the time, and a fourth coal gas sealing guarantee measure is formed; the temperature monitoring system is used for judging the temperature of the ash in the sealed intermediate bin to determine the cooling degree of the ash in the ash bin, so that auxiliary judgment parameters can be provided for accurate ash discharge opportunity selection, and the material level condition in the ash bin can be indirectly reflected. The cooling system can cool the high-temperature ash to a proper temperature so as to be automatically transported by adopting equipment in the following process, a natural cooling mode taking the sealed intermediate bin shell as the cooling system is recommended, and a forced air cooling system or a forced water cooling system arranged on the sealed intermediate bin shell can be adopted.

In the technical scheme, all actions of all action parts are automatically judged by a computer according to the monitoring parameter values and are executed, so that the functions of cloud monitoring, full-automatic one-key operation ash unloading and ash cooling in the running process of the device are realized.

Compared with the prior art, the beneficial effects of the utility model are that:

1. four coal gas sealing guarantee measures are arranged, so that coal gas leakage in the ash discharging process is avoided, and ash discharging is fully automatically operated by one key through arranging pressure, material level and temperature sensors;

2. the high-temperature ash is cooled to a proper temperature through a cooling system, so that the high-temperature ash can be automatically transported by adopting equipment in the following process.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.

In the drawings:

FIG. 1 is a schematic cross-sectional view of the front view structure of the device of the present invention;

in the figure: 1-preposition high material level switch; 2-preposition low material level switch; 3-a front-mounted temperature sensor; 4-an ash discharge valve; 5-nitrogen sealing; 6-check valve; 7-an external nitrogen source; 8-high temperature resistant material; 9-ash guide pipe; 10-forced cooling system; 11-a pressure monitoring element; 12-sealing the intermediate bin; 13-rear temperature sensor; 14-a rear high material level switch; 15-rear low material level switch;

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

Referring to fig. 1, the present invention provides the following technical solutions: a sealed high-temperature ash discharging device for a gas system comprises an ash discharging buffer system, a front material level monitoring system, a rear material level monitoring system, a pressure monitoring element, a nitrogen sealing system and a cooling system. The ash discharge buffering system comprises an ash discharge valve 4 and a sealed intermediate bin 12; the preposed material level monitoring system comprises a preposed high material level switch 1 and a preposed low material level switch 2; a pressure monitoring element 11; the nitrogen sealing system comprises a nitrogen seal 5, a check valve 6 and an external nitrogen source 7; a cooling system 10. The method is characterized in that: the ash discharging buffer system consists of two ash discharging valves and a sealed middle bin, wherein the upper ash discharging valve is used for connecting an upper equipment ash hopper and an ash inlet of the sealed middle bin, and the lower ash discharging valve is connected with an ash discharging port of the sealed middle bin; the preposed material level monitoring system comprises a preposed high material level switch and a preposed low material level switch, and the preposed high material level switch and the preposed low material level switch are both arranged on an ash hopper of the equipment above and keep a certain vertical distance; the rear material level monitoring system comprises a rear high material level switch and a rear low material level switch, and the rear high material level switch and the rear low material level switch are both arranged on the sealed intermediate bin and keep a certain vertical distance; the nitrogen sealing system is arranged on a plurality of nitrogen seals, check valves and a nitrogen source at the upper part of the sealed intermediate bin, the check valves are connected with the nitrogen seals through pipelines, the pressure of the nitrogen source is higher than that of coal gas in an ash hopper of the equipment above, and nitrogen entering the sealed intermediate bin through the nitrogen seals forms a high-pressure nitrogen sealing layer in the sealed intermediate bin; the pressure monitoring element is arranged at the upper part of the sealed middle bin and extends into the high-pressure nitrogen sealing layer.

All system monitoring signals enter the computer. And simulating equipment running pictures in the computer, and automatically executing operation by each action executor according to each monitoring parameter.

The utility model discloses a theory of operation and use flow: the utility model discloses, under the normal operating condition, unloading valves 4 all is in the closed condition, also is full of nitrogen gas in the sealed intermediate bin 12, and through nitrogen gas sealing system, makes nitrogen gas pressure be higher than the at least 5kPa of gas system pressure in the sealed intermediate bin all the time. After the front high material level switch 1 receives the high material level signal, the opening of the first ash discharge valve 4 above the sealed intermediate bin is automatically controlled by a program. After the front low material level switch 2 receives the low material level signal, the first ash discharge valve 4 is controlled to be closed by program automatic control. When the rear high material level switch in the sealed intermediate bin 12 receives the high material level signal, the ash discharge valve 4 below the sealed intermediate bin 12 is automatically controlled by a program to open the ash discharge valve 4 below the sealed intermediate bin 12. When the rear low material level switch 15 receives the low material level signal, the ash discharge valve 4 below the sealed intermediate bin 12 is controlled to be closed automatically by a program. The cooling system 10 can accelerate the reduction of the ash temperature while collecting the ash. The temperature monitoring parameters provide correction feedback for the system to judge the automatic ash unloading time.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a coal gas system is with sealed high temperature ash unloading device which characterized in that: the device comprises an ash discharge buffer system, a front material level monitoring system, a rear material level monitoring system, a pressure monitoring element, a nitrogen sealing system and a cooling system; the ash discharging buffer system consists of two ash discharging valves and a sealed middle bin, wherein the upper ash discharging valve is used for connecting an upper equipment ash hopper and an ash inlet of the sealed middle bin, and the lower ash discharging valve is connected with an ash discharging port of the sealed middle bin; the preposed material level monitoring system comprises a preposed high material level switch and a preposed low material level switch, and the preposed high material level switch and the preposed low material level switch are both arranged on an ash hopper of the equipment above and keep a certain vertical distance; the rear material level monitoring system comprises a rear high material level switch and a rear low material level switch, and the rear high material level switch and the rear low material level switch are both arranged on the sealed intermediate bin and keep a certain vertical distance; the nitrogen sealing system comprises a plurality of nitrogen seals, check valves and a nitrogen source, wherein the nitrogen seals, the check valves and the nitrogen source are arranged at the upper part of the sealed intermediate bin; the pressure monitoring element is arranged at the upper part of the sealed middle bin and extends into the high-pressure nitrogen sealing layer.

2. The sealed high-temperature ash discharging device for the gas system as claimed in claim 1, wherein: the pressure of the high-pressure nitrogen gas sealing layer is higher than that of the coal gas in the ash bucket of the upper equipment and is not lower than 5 kPa.

3. The sealed high-temperature ash discharging device for the gas system as claimed in claim 1, wherein: the prepositive low material level switch is higher than the upper ash discharge valve for a certain distance.

4. The sealed high-temperature ash discharging device for the gas system as claimed in claim 1, wherein: the rear low material level switch is higher than the lower ash discharge valve for a certain distance.

5. The sealed high-temperature ash discharging device for the gas system as claimed in claim 1, wherein: the pressure monitoring element is higher than the rear high material level switch for a certain distance.

6. The sealed high-temperature ash discharging device for the gas system as claimed in claim 1, wherein: the cooling system is a sealed intermediate bin shell.

7. The sealed high-temperature ash discharging device for the gas system as claimed in claim 1, wherein: the cooling system is a forced air cooling system arranged on the sealed intermediate bin shell.

8. The sealed high-temperature ash discharging device for the gas system as claimed in claim 1, wherein: the cooling system is a forced water cooling system arranged on the sealed intermediate bin shell.

9. The sealed high-temperature ash discharging device for the gas system as claimed in claim 1, wherein: the sealed intermediate bin is internally provided with a high-temperature resistant material.

10. The sealed high-temperature ash discharging device for the gas system as claimed in claim 1, wherein: the device is also provided with a temperature monitoring system comprising a front temperature sensor and a rear temperature sensor, wherein the front temperature sensor is arranged at the lower part of the ash hopper of the equipment above, and the rear temperature sensor is arranged at the lower part of the sealed middle bin.