CN215327931U

CN215327931U - Device for preparing water gas based on UGI furnace or continuous pure oxygen gasification furnace

Info

Publication number: CN215327931U
Application number: CN202121699063.2U
Authority: CN
Inventors: 唐红梅; 闻继松; 罗喜梅
Original assignee: Jiangsu Shenyan Energy Saving And Environmental Protection Technology Co ltd
Current assignee: Jiangsu Shenyan Energy Saving And Environmental Protection Technology Co ltd
Priority date: 2021-07-26
Filing date: 2021-07-26
Publication date: 2021-12-28
Anticipated expiration: 2031-07-26

Abstract

The utility model discloses a device for preparing water gas based on a UGI furnace or a continuous pure oxygen gasifier, which comprises a steam buffer tank, a mixer, a gas making furnace, a cyclone dust collector, a metal film filter, a heat recoverer and a gas cooler, wherein a steam input port of the steam buffer tank is connected with an external steam source, a steam output port of the steam buffer tank is connected with one input port of the mixer, an output port of the mixer is connected with a lower input port of the gas making furnace, an upper water gas output port of the gas making furnace is connected with an air inlet of the cyclone dust collector, an air outlet of the cyclone dust collector is connected with an air inlet of the metal film filter, an air outlet of the metal film filter is connected with a high-temperature air inlet of the heat recoverer, a low-temperature air outlet of the heat recoverer is connected with an air inlet of the gas cooler, and an air outlet of the gas cooler realizes the outward delivery of the gas through water sealing. By adopting the structure, the utility model can reduce the equipment maintenance frequency and cost, improve the heat exchange efficiency and reduce the energy consumption.

Description

Device for preparing water gas based on UGI furnace or continuous pure oxygen gasification furnace

Technical Field

The utility model relates to the field of water gas preparation, in particular to a device for preparing water gas based on a UGI furnace or a continuous pure oxygen gasifier.

Background

At present, the coal gas UGI furnace or the continuous pure oxygen gasification furnace is generally adopted in the coal chemical industry to prepare water gas, the water gas just coming out of the coal gas furnace can only be called qualified semi-water gas, a large amount of dust is contained in the water gas, and the required product water gas is finally obtained through dust removal, heat exchange, washing, purification and the like.

The prior art has the following defects:

1. the maintenance cost is high: because coal system gas UGI stove or continuous pure oxygen gasification stove contain a large amount of dust when making water coal gas, because the hardness of dust is high, the velocity of flow is fast, and when the water gas participated in the heat transfer, it was violent to the hot exchange tube scour of waste heat boiler, leads to the hot exchange tube to damage very easily, and the change frequency is high, and the maintenance cost is high.

2. Waste of heat source: the water gas contains water and dust, and is easy to adhere to the wall of a heat exchanger of the waste heat boiler, so that the heat transfer coefficient is reduced, the heat exchange is reduced, the generated steam is reduced, and unnecessary waste of a heat source is caused.

3. The prior bag filter is generally adopted to further filter the water gas after heat exchange, and the bag filter adopts a cloth bag as a core component, so that the service life of the bag filter is greatly shortened and the emission concentration is influenced in a high-pressure and high-humidity environment.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a device for preparing water gas based on a UGI furnace or a continuous pure oxygen gasification furnace, and solves the problems of high equipment maintenance frequency and maintenance cost, low heat exchange efficiency, waste of heat source and short service life of equipment in the process of preparing water gas by the existing coal gas UGI furnace or the continuous pure oxygen gasification furnace.

The technical scheme adopted by the utility model for solving the problems is as follows:

a device for preparing water gas based on a UGI furnace or a continuous pure oxygen furnace comprises a steam buffer tank, a mixer, a gas making furnace, a cyclone dust collector, a metal film filter, a heat recoverer and a gas cooler, wherein a steam input port of the steam buffer tank is connected with an external steam source, a steam output port of the steam buffer tank is connected with one input port of the mixer, the other input port of the mixer is connected with an external oxygen source, an output port of the mixer is connected with a lower input port of the gas making furnace, an upper water gas output port of the gas making furnace is connected with a gas inlet of the cyclone dust collector, a gas outlet of the cyclone dust collector is connected with a gas inlet of the metal film filter, a gas outlet of the metal film filter is connected with a high-temperature gas inlet of the heat recoverer, and a low-temperature gas outlet of the heat recoverer is connected with a gas inlet of the gas cooler, and the gas outlet of the gas cooler is sealed by water to realize the delivery of water gas.

Further, as a preferred technical scheme, the system further comprises a first steam drum, a water inlet of the first steam drum is connected with an external desalination water pipeline, a circulating air inlet and an circulating air outlet of the first steam drum are respectively and correspondingly connected with a circulating air inlet and an circulating air outlet of the gas making furnace, and a steam outlet of the first steam drum is connected with a steam inlet of the steam buffer tank.

Further, as a preferred technical scheme, the system further comprises a second steam pocket, a water inlet of the second steam pocket is connected with an external desalination water pipeline, the second steam pocket comprises two groups of circulating air inlet and outlet ports, one group of circulating air inlet and outlet ports are respectively and correspondingly connected with the circulating air inlet and outlet ports of the cyclone dust collector, the other group of circulating air inlet and outlet ports are respectively and correspondingly connected with the circulating air inlet and outlet ports of the heat recoverer, a steam outlet of the second steam pocket is connected with a steam inlet of the heat recoverer, and a steam outlet of the heat recoverer is connected with a steam inlet of the steam buffer tank.

Further, as a preferred technical scheme, the heat recoverer is a waste heat boiler.

Further, as a preferred technical scheme, the gas cooler also comprises a closed cooling water system, and the closed cooling water system is connected with the gas cooler and continuously provides cooling water for the gas cooler.

Further, as a preferred technical scheme, the coal gas recovery system further comprises a rich liquid buffer tank, wherein a liquid inlet of the rich liquid buffer tank is connected with a liquid outlet of the coal gas cooler, and a liquid outlet of the rich liquid buffer tank is connected with a reclaimed water system.

Further, as a preferred technical scheme, the system also comprises a purification tower, wherein an air inlet of the purification tower is connected with an air outlet of the gas cooler, and an air outlet of the purification tower is connected with an air storage cabinet or an outward delivery pipeline.

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

(1) the metal film filter is innovatively introduced into the water gas preparation, the metal film filter can resist high temperature and corrosion, has high filtering precision and temperature, can thoroughly remove dust in the water gas without cooling, reduces the dust content in the water gas to be below 5mg or Nm3, and then sends the water gas into a heat recoverer (waste heat boiler) for heat exchange treatment, wherein the water gas basically does not contain dust, so that the scouring abrasion of the water gas entering the heat recoverer (waste heat boiler) on the boiler pipe wall is obviously reduced by introducing the metal film filter, the service life of the boiler pipe wall can be greatly prolonged, and the shutdown overhaul time is shortened; on the other hand, the reduction of the dust in the water gas can reduce the dust attachment amount on the pipe wall of the boiler, and compared with the direct heat exchange of the traditional high-temperature water gas, the utility model can improve the heat exchange efficiency of the water gas and the water medium in the waste heat boiler, is beneficial to the waste heat boiler to produce more steam and is used for a front-end gas making furnace, thereby reducing the steam input consumption of the front end and further reducing the energy consumption to a certain extent.

(2) The utility model can safely and stably recover the fly ash particles in the water gas by adopting the metal film filter, so that the dust content in the water gas is reduced to be less than 5mg or Nm3, and the carbon content of the fly ash recovered by a single furnace is about 40 percent and is sent to three waste furnaces to be used as fuel, thereby effectively reducing the energy consumption.

(3) The utility model adopts the metal film filter and arranges the metal film filter at the front end of the heat recoverer (waste heat boiler), and the dust in the water gas is thoroughly removed, so that the water gas entering the heat recoverer (waste heat boiler) does not influence the heat exchange efficiency of the boiler pipe wall as much as possible, thereby ensuring that the temperature of the water gas outlet of the heat recoverer (waste heat boiler) can be reduced to about 120 ℃, further leading the circulating water used by the rear-end gas cooler to be less, leading the power consumption of the circulating pump to be less and achieving the purposes of saving water and electricity.

(4) According to the utility model, through arranging the first steam pocket and the second steam pocket, multiple heat exchange of water gas is realized, the recycling of heat is greatly realized, as much steam as possible is produced and returned to the front-end gas making furnace for use, so that the consumption of source steam can be reduced, and the energy consumption is reduced.

Drawings

FIG. 1 is a schematic structural diagram of the apparatus of the present invention.

The names corresponding to the marks in the drawings are as follows:

1. the system comprises a steam buffer tank, 2, a mixer, 3, a gas making furnace, 4, a cyclone dust collector, 5, a metal film filter, 6, a heat recoverer, 7, a coal gas cooler, 8, a rich liquid buffer tank, 9, a closed cooling water system, 10, a water seal, 11, a first steam pocket, 12 and a second steam pocket.

Detailed Description

The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited to these examples.

Example 1

As shown in fig. 1, the apparatus for preparing water gas based on UGI furnace or continuous pure oxygen furnace according to this embodiment includes a steam buffer tank 1, a mixer 2, a gas making furnace 3, a cyclone dust collector 4, a metal film filter 5, a heat recovery device 6 and a gas cooler 7, wherein a steam input port of the steam buffer tank 1 is connected to an external steam source, a steam output port of the steam buffer tank 1 is connected to one input port of the mixer 2, another input port of the mixer 2 is connected to an external oxygen source, an output port of the mixer 2 is connected to a lower input port of the gas making furnace 3, an upper water gas output port of the gas making furnace 3 is connected to an air inlet of the cyclone dust collector 4, an air outlet of the cyclone dust collector 4 is connected to an air inlet of the metal film filter 5, an air outlet of the metal film filter 5 is connected to a high temperature air inlet of the heat recovery device 6, a low temperature air outlet of the heat recovery device 6 is connected to an air inlet of the gas cooler 7, the gas outlet of the gas cooler 7 is communicated with water gas through a water seal 10, and the water seal 10 is a common existing structure.

In the embodiment, the steam buffer tank 1 is used for receiving the steam sent from the outside and sending the steam into the mixer 2, in the mixer 2, the oxygen and the steam are mixed, then the mixed oxygen and the steam are sent into the gas making furnace 3, and the gas making furnace 3 generates semi-water gas, so the semi-water gas is called semi-water gas because the water gas at the moment contains a large amount of moisture and dust and does not belong to the product water gas; most of dust in the semi-water gas is removed by the cyclone dust collector 4, then the semi-water gas passes through the metal film filter 5, the dust content in the semi-water gas is reduced to be below 5mg or Nm3, and the dust collected by the cyclone dust collector 4 and the metal film filter 5 can be sent to three waste furnaces to be used as fuel, so that the energy consumption can be effectively reduced; and (3) sending the semi-water gas after the dust removal into a heat recovery device 6 for heat exchange, cooling the semi-water gas after the heat exchange and temperature reduction again, and sending out the finished water gas finally obtained.

In the embodiment, the temperature of the semi-water gas just coming out of the gas making furnace 3 is approximately 440-460 ℃, which has a high heat recovery value, most of the dust in the semi-water gas is firstly treated by the cyclone dust collector 4, and then the dust content in the semi-water gas is reduced to be below 5mg or Nm3 by the metal film filter 5, when the water gas with the dust content is subjected to heat exchange with the heat recoverer 6 (such as a waste heat boiler), the heat exchange tubes of the waste heat boiler cannot generate a bonding layer, so that the heat exchange efficiency of the waste heat boiler can be ensured to be always better, meanwhile, because the water gas does not contain dust basically, when the water gas is subjected to heat exchange with the waste heat boiler, compared with the prior high-dust water gas direct heat exchange, the water gas of the device has greatly reduced scouring of the heat exchange tubes of the waste heat boiler, and the service life of the heat exchange tubes is obviously prolonged, thereby enabling to reduce the replacement frequency and maintenance cost of the heat exchange tube.

In this embodiment, the heat recovery unit 6 preferably employs a waste heat boiler, and it should be noted that the waste heat boiler belongs to the existing structure, and refers to a boiler that produces steam by using waste heat in an industrial production process, and belongs to a high-temperature and high-pressure heat exchanger, so that the detailed structure and the working principle of the waste heat boiler are not described in detail in this embodiment.

It should be noted that the steam buffer tank 1, the mixer 2, the gas making furnace 3, the cyclone dust collector 4, the metal film filter 5, the heat recovery device 6 and the gas cooler 7 mentioned in this embodiment all belong to the existing structures, and those skilled in the art can easily achieve the object of the present invention by selecting the existing devices on the basis of knowing the connection relationship of the devices given in this embodiment, and do not need to pay creative labor, so the specific structure and the working principle of the devices are not described in detail in this embodiment.

Example 2

As shown in fig. 1, in this embodiment, on the basis of embodiment 1, a first steam drum 11 is further included, a water inlet of the first steam drum 11 is connected to an external desalination water pipeline, a circulation inlet and a circulation outlet of the first steam drum 11 are respectively connected to a circulation inlet and a circulation outlet of the gas making furnace 3, and a steam outlet of the first steam drum 11 is connected to a steam inlet of the steam buffer tank 1.

Also produced a large amount of heats when gas making furnace 3 produces semi-water gas, for avoiding the heat source extravagant, this embodiment is through introducing first steam pocket 11, the steam that will make gas furnace 3 produce is introduced into first steam pocket 11, and accomplish the heat exchange with the desalinized water in the first steam pocket 11, obtain desalinized water steam, then send back the 3 front ends of gas making furnace to the desalinized water steam, replenish as steam, thereby can reduce the quantity of outside source steam at a certain extent, reduce the energy consumption, and save cost.

Similarly, in order to further reduce the consumption of source steam, the embodiment further includes a second steam drum 12, a water inlet of the second steam drum 12 is connected with an external desalination water pipeline, the second steam drum 12 includes two sets of circulation inlet and outlet ports, one set of circulation inlet and outlet ports are respectively connected with the circulation inlet and outlet ports of the cyclone dust collector 4, the other set of circulation inlet and outlet ports are respectively connected with the circulation inlet and outlet ports of the heat recoverer 6, a steam outlet of the second steam drum 12 is connected with a steam inlet of the heat recoverer 6, and a steam outlet of the heat recoverer 6 is connected with a steam inlet of the steam buffer tank 1.

The second steam drum 12 realizes double-circulation heat exchange with the cyclone dust collector 4 and the heat recoverer 6, greatly improves the recovery value of gas heat, and simultaneously generates steam as much as possible and supplements the steam to the steam requirement of the gas making furnace 3, thereby reducing the consumption of front-end steam as much as possible and saving the cost.

The first steam drum 11 and the second steam drum 12 introduced in this embodiment are both steam drums, belong to the prior art, and are cylindrical pressure vessels used for steam-water separation and steam purification in a water pipe boiler, forming a water circulation loop and storing boiler water, so the specific structures and working principles of the first steam drum 11 and the second steam drum 12 are not described in detail in this embodiment.

In order to better realize the cooling of the water gas, the closed cooling water system 9 is introduced in the embodiment, the closed cooling water system 9 is connected with the gas cooler 7 and continuously provides cooling water for the gas cooler 7, the gas cooler 7 can be a coil type heat exchanger, the coil type heat exchanger belongs to the existing structure, and the cooling water is introduced to complete heat exchange between the water gas and the cooling water, so that the effect of cooling the water gas is achieved. The closed cooling water system 9 continuously improves cooling water for the gas cooler 7 so as to cool the water gas to meet the requirement of the product water gas, and the closed cooling water system 9 belongs to the existing structure and is a main system for providing a cooling water source for auxiliary equipment of a unit so as to ensure normal operation of the equipment, so that the concrete structures and the working principle of the closed cooling water system 9 and the gas cooler 7 are not described in too much detail in the embodiment.

In order to avoid the waste of water resources, the embodiment further comprises a rich liquid buffer tank 8, a liquid inlet of the rich liquid buffer tank 8 is connected with a liquid outlet of the gas cooler 7, and a liquid outlet of the rich liquid buffer tank 8 is connected with the reclaimed water system.

The reclaimed water system is a water supply system taking reclaimed water as a water source, generally comprises three subsystems of water delivery, water distribution and treatment, wherein the reclaimed water is the urban sewage which can be reused in a certain range after being treated to reach the specified water quality standard, and is mainly used for toilet flushing, garden irrigation, vehicle flushing, industrial cooling water, building engineering, fire-fighting water and the like. The water flowing out of the liquid outlet of the gas cooler 7 in the embodiment can be sent to a reclaimed water system for treatment, and the reclaimed water can be recycled after reaching the standard of reclaimed water, so that the maximum utilization of resources is realized, and the waste is reduced.

Certainly, according to the difference of demand, in order to obtain cleaner water gas, this embodiment still can increase the purge tower (not drawn in the figure), and the air inlet of purge tower links to each other with the gas outlet of coal gas cooler 7, and the water gas is after the cooling, carries out purification treatment through the purge tower to remaining impurity in the water gas, obtains cleaner water gas, can carry out the gas holder storage or directly send outward with clean water gas finally.

As described above, the present invention can be preferably realized.

The foregoing is only a preferred embodiment of the present invention, and the present invention is not limited thereto in any way, and any simple modification, equivalent replacement and improvement made to the above embodiment within the spirit and principle of the present invention still fall within the protection scope of the present invention.

Claims

1. The device for preparing water gas based on the UGI furnace or the continuous pure oxygen furnace is characterized by comprising a steam buffer tank (1), a mixer (2), a gas making furnace (3), a cyclone dust collector (4), a metal film filter (5), a heat recoverer (6) and a gas cooler (7), wherein a steam input port of the steam buffer tank (1) is connected with an external steam source, a steam output port of the steam buffer tank (1) is connected with one input port of the mixer (2), the other input port of the mixer (2) is connected with an external oxygen source, an output port of the mixer (2) is connected with a lower input port of the gas making furnace (3), an upper water gas output port of the gas making furnace (3) is connected with a gas inlet of the cyclone dust collector (4), a gas outlet of the cyclone dust collector (4) is connected with a gas inlet of the metal film filter (5), the gas outlet of the metal film filter (5) is connected with the high-temperature gas inlet of the heat recoverer (6), the low-temperature gas outlet of the heat recoverer (6) is connected with the gas inlet of the gas cooler (7), and the gas outlet of the gas cooler (7) is used for realizing water gas delivery through a water seal (10).

2. The device for producing water gas based on UGI furnace or continuous pure oxygen furnace according to claim 1, further comprising a first steam drum (11), wherein the water inlet of the first steam drum (11) is connected with an external desalted water pipeline, the circulating air inlet and outlet of the first steam drum (11) are correspondingly connected with the circulating air inlet and outlet of the gas making furnace (3), respectively, and the steam outlet of the first steam drum (11) is connected with the steam inlet of the steam buffer tank (1).

3. The device for preparing water gas based on UGI furnace or continuous pure oxygen furnace according to claim 1 or 2, characterized by further comprising a second steam drum (12), wherein the water inlet of the second steam drum (12) is connected with an external desalted water pipeline, the second steam drum (12) comprises two sets of circulating air inlet and outlet ports, one set of circulating air inlet and outlet ports are respectively and correspondingly connected with the circulating air inlet and outlet port of the cyclone dust collector (4), the other set of circulating air inlet and outlet ports are respectively and correspondingly connected with the circulating air inlet and outlet port of the heat recoverer (6), the steam outlet of the second steam drum (12) is connected with the steam inlet of the heat recoverer (6), and the steam outlet of the heat recoverer (6) is connected with the steam inlet port of the steam buffer tank (1).

4. The device for producing water gas based on UGI furnace or continuous pure oxygen furnace according to claim 1, characterized in that the heat recovery device (6) is a waste heat boiler.

5. The device for producing water gas based on UGI furnace or continuous pure oxygen furnace according to claim 1, characterized by further comprising a closed cooling water system (9), wherein the closed cooling water system (9) is connected with the gas cooler (7) and continuously provides cooling water for the gas cooler (7).

6. The device for producing water gas based on UGI furnace or continuous pure oxygen furnace according to claim 1, characterized by further comprising a rich liquid buffer tank (8), wherein a liquid inlet of the rich liquid buffer tank (8) is connected with a liquid outlet of the gas cooler (7), and a liquid outlet of the rich liquid buffer tank (8) is connected with a reclaimed water system.

7. The device for producing water gas based on UGI furnace or continuous pure oxygen furnace according to claim 1, characterized by further comprising a purification tower, wherein the gas inlet of the purification tower is connected with the gas outlet of the gas cooler (7), and the gas outlet of the purification tower is connected with a gas storage cabinet or an outward pipeline.