Coal gasification black water treatment device

Abstract

The utility model discloses a coal gasification black water treatment device, include: coal gasification black water pipeline, raw material loading equipment, stirring box, valve, mixer and gasification settling tank, wherein the first inlet of mixer is connected with coal gasification black water pipeline, and the second inlet is connected with stirring box through valve, and the outlet of mixer is connected with gasification settling tank, raw material loading equipment is used to add prepared slaked lime powder and liquid respectively to stirring box, stirring box is used to stir slaked lime powder and liquid, and prepares lime emulsion, coal gasification black water pipeline imports the coal gasification black water that needs to handle mixer, and mixer mixes lime emulsion and coal gasification black water, and lime emulsion and the ion in coal gasification black water take place chemical reaction and settle, and the alkalinity and / or hardness of black water is reduced, the device can reduce the hardness and / or alkalinity in the coal gasification black water of utility model, and reduce the scaling tendency of slag water system.

Description

Technical Field

[0001] This utility model relates to the field of coal chemical technology, and in particular to a coal gasification black water treatment device. Background Technology

[0002] During the coal gasification process, some metal ions in the raw coal dissolve into the water during the contact between the ash and water, resulting in the coal gasification slag water system having characteristics such as high hardness and high alkalinity.

[0003] Existing treatment processes are unable to economically, efficiently, and stably remove hardness and alkalinity from sludge, forcing gasification units to continuously discharge large amounts of wastewater to prevent the accumulation of scaling ions. This results in severe scaling in downstream pipeline systems and increased wastewater discharge; furthermore, the gasification unit needs to replenish large amounts of demineralized water due to wastewater discharge, increasing water consumption and water costs.

[0004] Therefore, a solution is needed that can effectively reduce the hardness and alkalinity of coal gasification black water. Utility Model Content

[0005] The purpose of this invention is to provide a coal gasification black water treatment device to at least partially solve the above-mentioned problems of the prior art.

[0006] To achieve the above objectives, this utility model provides a coal gasification black water treatment device, comprising: a coal gasification black water pipeline 11, a raw material loading device, a mixing tank 9, a valve 10, a mixer 12, and a gasification settling tank 13; wherein the first inlet of the mixer 12 is connected to the coal gasification black water pipeline 11, the second inlet is connected to the mixing tank 9 through the valve 10, and the outlet of the mixer 12 is connected to the gasification settling tank 13;

[0007] The raw material loading device is used to add pre-prepared quicklime powder and liquid into the mixing tank 9 respectively;

[0008] The mixing tank 9 is used to mix the quicklime powder and the liquid to prepare lime slurry;

[0009] The valve 10 is used to control the speed at which the lime slurry enters the mixer 12;

[0010] The coal gasification black water pipeline 11 is used to input the coal gasification black water that needs to be treated into the mixer 12;

[0011] The mixer 12 is used to mix the lime slurry and the coal gasification black water. The mixed lime slurry and coal gasification black water enter the gasification settling tank 13. The lime slurry reacts chemically with the ions in the coal gasification black water and settles, reducing the alkalinity and / or hardness of the black water.

[0012] Preferably, the raw material loading equipment includes a quicklime powder loading equipment, comprising a lime powder pneumatic conveying pipeline 3, a lime powder silo 4, a hopper 6, and a metering feeder 7;

[0013] The lime powder pneumatic conveying pipeline 3 is connected to the lime powder silo 4, and quicklime powder is fed into the lime powder silo 4;

[0014] The hopper 6 of the lime powder silo 4 is connected to the metering feeder 7, and the amount of lime powder delivered to the mixing tank 9 is controlled by the metering feeder 7.

[0015] Preferably, the device further includes a screw conveyor 8;

[0016] One end of the screw conveyor 8 receives the quicklime powder from the metering feeder 7, and the other end adds the quicklime powder to the mixing tank 9.

[0017] Preferably, the metering feeder 7 includes a weighing feeder.

[0018] Preferably, the valve 10 includes a metering pump for controlling the flow rate of the quicklime powder into the mixer 12.

[0019] Preferably, the device further includes a dust collector 5, which is disposed at the upper end of the lime powder silo 4 and is used to filter the air discharged when the lime powder silo 4 receives lime powder conveyed by the lime powder pneumatic conveying pipe 3.

[0020] Preferably, the hopper 6 includes a vibrating hopper.

[0021] Compared with the prior art, the present invention has at least the following advantages:

[0022] By using the coal gasification black water treatment device provided in this embodiment, quicklime is used as a reagent to react chemically with relevant ions in the coal gasification black water and cause flocculation and sedimentation, thereby reducing the hardness and / or alkalinity of the coal gasification black water, reducing the scaling tendency of the slag water system, which is conducive to the long-term stable operation of the gasification device, reducing the amount of external drainage and makeup water of the gasification device, and reducing the operating cost of coal gasification. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a coal gasification black water treatment device provided in an embodiment of the present invention. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0025] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate to understand the embodiments of the utility model described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a product or device comprising a series of units is not necessarily limited to those explicitly listed, but may include other units not explicitly listed or inherent to such product or device.

[0026] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0027] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0028] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0029] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] Example 1

[0031] This embodiment provides a coal gasification black water treatment device. Figure 1 A schematic diagram of the structure of the coal gasification black water treatment device is shown, as follows: Figure 1 As shown, the device includes:

[0032] The equipment includes a coal gasification black water pipeline 11, a raw material loading device, a mixing tank 9, a valve 10, a mixer 12, and a gasification settling tank 13; wherein the first inlet of the mixer 12 is connected to the coal gasification black water pipeline 11, the second inlet is connected to the mixing tank 9 through the valve 10, and the outlet of the mixer 12 is connected to the gasification settling tank 13.

[0033] The raw material loading device is used to add pre-prepared quicklime powder and liquid to the mixing tank 9, respectively. The raw material loading device may include a quicklime powder loading device and a liquid loading device. The liquid loading device can be a water pipe.

[0034] In a preferred embodiment, the quicklime powder loading device may include Figure 1 The diagram shows a pneumatic conveying pipeline 3 for lime powder, a lime powder silo 4, a hopper 6, and a metering feeder 7. The pneumatic conveying pipeline 3 connects to the lime powder silo 4, feeding quicklime powder 2 into it. The hopper 6 of the lime powder silo 4 connects to the metering feeder 7, which controls the amount of lime powder fed into the mixing tank 9. The device may also include a dust collector 5, located at the upper end of the lime powder silo 4, to filter the air discharged when the silo receives lime powder from the pneumatic conveying pipeline 3. The hopper 6 may include a vibrating hopper to prevent lime powder from clogging the conical outlet section through vibration. The metering feeder 7 may include a weighing feeder.

[0035] The mixing tank 9 is used to mix the quicklime powder and the liquid to prepare lime slurry. In a preferred embodiment, a lime slurry with a mass concentration of 1%-15% is prepared. To prepare a lime slurry of this mass concentration, the feeding speed of the metering feeder 7 can be controlled according to the lime slurry output speed and liquid addition speed of the mixing tank 9, thereby ensuring that the mass concentration of the lime slurry in the mixing tank 9 meets the requirements.

[0036] In one embodiment, the mixing tank 9 can be located below the feeder 7 to directly receive the lime powder output by the feeder 7.

[0037] In another embodiment, a screw conveyor 8 may also be included; one end of the screw conveyor 8 receives the quicklime powder from the metering feeder 7, and the other end adds the quicklime powder to the mixing tank 9. In this case, the positional relationship between the mixing tank 9 and the feeder 7 can be set more flexibly.

[0038] The valve 10 is used to control the rate at which the lime slurry enters the mixer 12. In a preferred embodiment, the valve 10 includes a metering pump for controlling the flow rate of the slaked lime powder entering the mixer 12.

[0039] The coal gasification black water pipeline 11 is used to input the coal gasification black water 1 that needs to be treated into the mixer 12; the mixer 12 is used to mix the lime slurry and the coal gasification black water, and the mixed lime slurry and coal gasification black water enter the gasification settling tank 13, where the lime slurry reacts chemically with the ions in the coal gasification black water and settles, reducing the alkalinity and / or hardness of the black water.

[0040] By employing the coal gasification black water treatment device provided in this embodiment of the invention, quicklime is used as a reagent to chemically react with relevant ions in the coal gasification black water and cause flocculation and sedimentation, thereby reducing the hardness and alkalinity of the coal gasification black water, reducing the scaling tendency of the slag water system, which is conducive to the long-term stable operation of the gasification device, reducing the amount of external drainage and makeup water of the gasification device, and reducing the operating cost of coal gasification.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Those skilled in the art should understand that modifications can be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A coal gasification black water treatment device, characterized in that, include: The gasification black water pipeline (11), raw material loading equipment, mixing tank (9), valve (10), mixer (12), and gasification settling tank (13) are provided; wherein the first inlet of the mixer (12) is connected to the gasification black water pipeline (11), the second inlet is connected to the mixing tank (9) through the valve (10), and the outlet of the mixer (12) is connected to the gasification settling tank (13). The raw material loading device is used to add pre-prepared quicklime powder and liquid into the mixing tank (9); The mixing tank (9) is used to mix the quicklime powder and the liquid to prepare lime slurry; The valve (10) is used to control the speed at which the lime slurry enters the mixer (12); The coal gasification black water pipeline (11) is used to input the coal gasification black water that needs to be treated into the mixer (12). The mixer (12) is used to mix the lime slurry and the coal gasification black water. The mixed lime slurry and the coal gasification black water enter the gasification settling tank (13). The lime slurry reacts chemically with the ions in the coal gasification black water and settles, reducing the alkalinity and / or hardness of the black water.

2. The coal gasification black water treatment device according to claim 1, characterized in that, The raw material loading equipment includes a quicklime powder loading equipment, which includes a lime powder pneumatic conveying pipeline (3), a lime powder silo (4), a hopper (6), and a metering feeder (7). The lime powder pneumatic conveying pipeline (3) is connected to the lime powder silo (4) and hydrated lime powder is fed into the lime powder silo (4); The hopper (6) of the lime powder silo (4) is connected to the metering feeder (7), and the amount of lime powder delivered to the mixing tank (9) is controlled by the metering feeder (7).

3. The coal gasification black water treatment device according to claim 2, characterized in that, It also includes a screw conveyor (8); One end of the screw conveyor (8) receives the quicklime powder from the metering feeder (7), and the other end adds the quicklime powder into the mixing tank (9).

4. The coal gasification black water treatment device according to claim 2 or 3, characterized in that, The metering feeder (7) includes a weighing feeder.

5. The coal gasification black water treatment device according to any one of claims 1-3, characterized in that, The valve (10) includes a metering pump for controlling the flow rate of the quicklime powder into the mixer (12).

6. The coal gasification black water treatment device according to claim 2, characterized in that, It also includes a dust collector (5), which is installed at the upper end of the lime powder silo (4) to filter the air discharged when the lime powder silo (4) receives lime powder conveyed by the lime powder pneumatic conveying pipe (3).

7. The coal gasification black water treatment device according to claim 2, characterized in that, The hopper (6) includes a vibrating hopper.

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