阅读说明：本技术 一种水煤浆气化废水掺烧系统 (Coal water slurry gasification waste water blending combustion system ) 是由 岳军 马宏波 张本凤 管清亮 于 2020-06-04 设计创作，主要内容包括：本发明公开了一种水煤浆气化废水掺烧系统,包括气化炉、洗气塔和水回收装置,气化炉的顶部设置有烧嘴,烧嘴上连接有氧气通道、高危废水通道、燃料气通道和料浆通道,气化炉内自上而下依次设置有气化反应段、余热回收段和集渣池,气化炉通过管道与洗气塔连通,水回收装置通过管道分别与洗气塔及气化炉连通。效果为：通过本发明的一种水煤浆气化废水掺烧系统,突破了传统加压气化废水处理的方式,拓展了水煤浆气化领域废水处理的范围,可以对一些高毒性高污染性的废液进行处理,气化炉实现高毒性废水及高污染废水的处理能力,具有相对投资费用低、工艺简洁、操作简单灵活,同时有效保护装置现场在使用高毒性废水的稳定性及安全性等特点。(The invention discloses a coal water slurry gasification wastewater blending combustion system which comprises a gasification furnace, a gas washing tower and a water recovery device, wherein a burner is arranged at the top of the gasification furnace, an oxygen channel, a high-risk wastewater channel, a fuel gas channel and a slurry channel are connected to the burner, a gasification reaction section, a waste heat recovery section and a slag collecting tank are sequentially arranged in the gasification furnace from top to bottom, the gasification furnace is communicated with the gas washing tower through a pipeline, and the water recovery device is respectively communicated with the gas washing tower and the gasification furnace through pipelines. The effect is as follows: the coal water slurry gasification wastewater co-combustion system breaks through the traditional pressurized gasification wastewater treatment mode, expands the wastewater treatment range in the coal water slurry gasification field, can treat some high-toxicity and high-pollution waste liquid, realizes the treatment capacity of the high-toxicity waste water and the high-pollution waste water by the gasification furnace, and has the characteristics of low relative investment cost, simple process, simple and flexible operation, effective protection of the stability and the safety of the device using the high-toxicity waste water on site, and the like.)

1. The utility model provides a coal slurry gasification waste water blending combustion system, its characterized in that includes gasifier, scrubbing tower (5) and water recovery unit (6), the top of gasifier is provided with nozzle (4), be connected with oxygen passageway, high-risk waste water channel, fuel gas channel and ground paste passageway on nozzle (4), gasification reaction section (1), waste heat recovery section (2) and slag collecting pit (3) have set gradually from top to bottom in the gasifier, the gasifier pass through the pipeline with scrubbing tower (5) intercommunication, water recovery unit (6) pass through the pipeline respectively with scrubbing tower (5) and the gasifier intercommunication.

2. The coal water slurry gasification wastewater co-combustion system as claimed in claim 1, wherein the high risk wastewater channel and the fuel gas channel share a channel to enter the burner (4); or the high-risk waste water channel and the slurry channel share a channel and enter the burner (4); or the high-risk waste water channel enters the burner (4) through a single channel.

3. The coal water slurry gasification wastewater co-combustion system as claimed in claim 1, further comprising an oxygen source (7), wherein the oxygen source (7) is arranged at a free end of the oxygen passage, the oxygen source (7) is communicated with the burner (4) through a plurality of pipelines, and a plurality of regulating valves are arranged on the pipeline between each oxygen source (7) and the burner (4).

4. The coal water slurry gasification wastewater co-combustion system as claimed in claim 3, further comprising a high-risk wastewater storage device (8) and a first metering pressurization pump (11), wherein the high-risk wastewater storage device (8) is arranged at a free end of the high-risk wastewater channel, and the first metering pressurization pump (11) and a plurality of regulating valves are arranged on a pipeline between the high-risk wastewater storage device (8) and the burner (4).

5. The coal water slurry gasification wastewater co-combustion system as claimed in claim 4, further comprising a fuel gas source (9), wherein the fuel gas source (9) is arranged at a free end of the fuel gas channel, and a plurality of regulating valves are arranged on a pipeline between the fuel gas source (9) and the burner (4).

6. The coal water slurry gasification wastewater co-combustion system as claimed in claim 5, further comprising a slurry preparation device (10) and a second metering pressurization pump (12), wherein the slurry preparation device (10) is arranged at a free end of the slurry channel, and the second metering pressurization pump (12) and a plurality of regulating valves are arranged on a pipeline between the slurry preparation device (10) and the burner (4).

7. The coal water slurry gasification wastewater blending combustion system as claimed in claim 1, wherein the gasification furnace is provided with a mixed gas outlet (15) and a gasification furnace water inlet (16), the gas scrubber (5) is provided with a gas scrubber gas inlet (18), a first gas scrubber gas outlet (21), a gas scrubber gas inlet (20), a second gas scrubber gas outlet (19) and a crude gas outlet (25), and the water recovery device (6) is provided with a first water recovery water inlet (22) and a water recovery water outlet (23); the mixed gas outlet (15) is communicated with the gas inlet (18) of the gas washing tower through a pipeline, and the raw gas outlet (25) is communicated with a rear working section; the first gas washing tower water outlet (21) is communicated with the first water recovery water inlet (22) through a pipeline, the water recovery water outlet (23) is communicated with the gas washing tower water inlet (20) through a pipeline, and the second gas washing tower water outlet (19) is communicated with the gasification furnace water inlet (16) through a pipeline.

8. The coal water slurry gasification wastewater blending combustion system according to claim 7, further comprising a first pressure pump (14) and a second pressure pump (13), wherein the first pressure pump (14) is arranged on a pipeline between the water recovery water outlet (23) and the water inlet (20) of the gas washing tower, and the second pressure pump (13) is arranged on a pipeline between the water outlet (19) of the second gas washing tower and the water inlet (16) of the gasification furnace.

9. The coal water slurry gasification wastewater co-combustion system as claimed in claim 8, wherein the gasification furnace is further provided with a gasification furnace water outlet (17), the water recovery device (6) is further provided with a second water recovery water inlet (24), and the gasification furnace water outlet (17) is communicated with the second water recovery water inlet (24) through a pipeline.

10. The water-coal-slurry gasification wastewater co-combustion system as claimed in claim 1, wherein the reaction pressure in the gasification furnace is between 0.2MPa and 8.7 MPa.

Technical Field

The invention relates to the technical field of coal chemical industry, in particular to a coal water slurry gasification wastewater co-combustion system.

Background

The water-cooled wall gasification technology of the coal water slurry is used in China from 2011, part of wastewater is generally used for pulping in the coal slurry preparation process, and the part of wastewater is mainly waste liquid without toxicity or with little toxicity for pulping; the process is mainly an innovation aiming at the wastewater, the wastewater is separately planned and accurately metered and then sent into a gasification furnace for treatment, and the wastewater is required to be alkaline, if the wastewater is acidic and can be used after neutralization, the part of the wastewater cannot be treated at present due to the environmental safety of the operation of the device and the problems of the pulping equipment.

Disclosure of Invention

Therefore, the invention provides a coal water slurry gasification wastewater co-combustion system, which aims to solve the problems that toxic wastewater causes secondary pollution and brings adverse effects to coal slurry preparation in the production process in the prior art.

In order to achieve the above purpose, the invention provides the following technical scheme:

according to the first aspect of the invention, the system for blending combustion of the water-coal-slurry gasification wastewater comprises a gasification furnace, a gas washing tower and a water recovery device, wherein a burner is arranged at the top of the gasification furnace, an oxygen channel, a high-risk wastewater channel, a fuel gas channel and a slurry channel are connected to the burner, a gasification reaction section, a waste heat recovery section and a slag collecting tank are sequentially arranged in the gasification furnace from top to bottom, the gasification furnace is communicated with the gas washing tower through a pipeline, and the water recovery device is respectively communicated with the gas washing tower and the gasification furnace through pipelines.

Further, the high-risk waste water channel and the fuel gas channel share a channel and enter the burner; or the high-risk waste water channel and the slurry channel share the channel and enter the burner; or, the high-risk waste water channel enters the burner through a single channel.

Further, the oxygen burner is characterized by further comprising an oxygen source, the free end of the oxygen channel is provided with the oxygen source, the oxygen source is communicated with the burner through a plurality of pipelines, and a plurality of regulating valves are arranged on the pipeline between each oxygen source and the burner.

Further, still include high-risk waste water deposit device and first measurement force (forcing) pump, the free end of high-risk waste water passageway is provided with high-risk waste water deposit device, is provided with first measurement force (forcing) pump and a plurality of governing valve on the pipeline between high-risk waste water deposit device and the nozzle.

And further, the burner further comprises a fuel gas source, the free end of the fuel gas channel is provided with the fuel gas source, and a plurality of regulating valves are arranged on a pipeline between the fuel gas source and the burner.

And the free end of the slurry channel is provided with the slurry preparation device, and a pipeline between the slurry preparation device and the burner is provided with the second metering pressure pump and a plurality of regulating valves.

Further, the gasification furnace is provided with a mixed gas outlet and a gasification furnace water inlet, the gas washing tower is provided with a gas washing tower gas inlet, a first gas washing tower water outlet, a gas washing tower water inlet, a second gas washing tower water outlet and a crude gas outlet, and the water recovery device is provided with a first water recovery water inlet and a water recovery water outlet; the mixed gas outlet is communicated with the gas inlet of the gas washing tower through a pipeline, and the crude gas outlet is communicated with the rear working section; the water outlet of the first gas washing tower is communicated with the first water recovery water inlet through a pipeline, the water recovery water outlet is communicated with the water inlet of the gas washing tower through a pipeline, and the water outlet of the second gas washing tower is communicated with the water inlet of the gasification furnace through a pipeline.

And further, the system also comprises a first pressure pump and a second pressure pump, wherein the first pressure pump is arranged on a pipeline between the water recovery water outlet and the water inlet of the gas washing tower, and the second pressure pump is arranged on a pipeline between the water outlet of the second gas washing tower and the water inlet of the gasification furnace.

Further, a gasifier water outlet is formed in the gasifier, a second water recovery water inlet is formed in the water recovery device, and the gasifier water outlet is communicated with the second water recovery water inlet through a pipeline.

Further, the reaction pressure in the gasification furnace is between 0.2MPa and 8.7 MPa.

The invention has the following advantages: the coal water slurry gasification wastewater co-combustion system breaks through the traditional pressurized gasification wastewater treatment mode, expands the wastewater treatment range in the coal water slurry gasification field, can treat some high-toxicity and high-pollution waste liquid, realizes the treatment capacity of the high-toxicity waste water and the high-pollution waste water by the gasification furnace, and has the characteristics of low relative investment cost, simple process, simple and flexible operation, effective protection of the stability and the safety of the device using the high-toxicity waste water on site, and the like.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.

Fig. 1 is a structural diagram of a coal water slurry gasification wastewater co-combustion system according to some embodiments of the present invention.

Fig. 2 is a structural diagram of a coal water slurry gasification wastewater co-combustion system according to some embodiments of the present invention.

In the figure: 1. the gasification reaction section 2, the waste heat recovery section 3, the slag collecting tank 4, the burner 5, the scrubbing tower 6, the water recovery device 7, the oxygen source 8, the high-risk waste water storage device 9, the fuel gas source 10, the slurry preparation device 11, the first metering pressure pump 12, the second metering pressure pump 13, the second pressure pump 14, the first pressure pump 15, the mixed gas outlet 16, the gasification furnace water inlet 17, the gasification furnace water outlet 18, the scrubbing tower air inlet 19, the second scrubbing tower water outlet 20, the scrubbing tower water inlet 21, the first scrubbing tower water outlet 22, the first water recovery water inlet 23, the water recovery water outlet 24, the second water recovery water inlet 25 and the crude gas outlet.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the water-cooling wall gasification technology of coal water slurry, especially, the waste water or grey water of a factory is generally used for pulping in the pulping process, the purpose is to relieve the treatment difficulty of the waste water of the factory, but the toxic organic waste water cannot be directly utilized in the pulping process, because the pulping system and the coal slurry storage system are normal-pressure containers, the toxic waste water can cause secondary pollution in the production process, and the preparation of the coal slurry is adversely affected.

The system and the process mainly aim at directly feeding the high-toxicity wastewater which cannot be treated in the pulping process into the burner, and completely-closed accurate measurement is carried out on the high-toxicity wastewater for treatment.