Saturation tower blowdown pipeline

Abstract

The utility model discloses a blowdown pipeline of a saturation tower. The blowdown pipeline comprises a main pipeline, and a front-end filtering heat exchanger, a plate heat exchanger and a sewage treatment tank which are sequentially arranged from upstream to downstream, the front-end filtering heat exchanger comprises a shell and a plurality of heat absorption layers, each heat absorption layer comprises a plurality of inverted-V-shaped hollow plate bodies which are evenly distributed in the horizontal direction, and the hollow plate bodies of every two adjacent heat absorption layers are distributed in a staggered mode. The shell is also provided with a sewage inlet, a sewage outlet, an impurity outlet, a water replenishing port, a water dividing tank and a water collecting tank, the impurity outlet is provided with a discharge pipe, and the downstream end of the discharge pipe is connected with the sewage treatment tank; two ends of the hollow plate body are respectively communicated with the water distribution tank and the water collection tank; the temperature of sewage entering the plate heat exchanger is reduced in advance through the front-end filtering heat exchanger, so that abnormal temperature rise of the subsequent sewage treatment tank is avoided, and nitrobacteria culture of the sewage treatment tank is facilitated; in addition, the front-end filtering heat exchanger also realizes coarse filtration and precipitation of sewage, so that the blockage problem of the plate heat exchanger is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to saturated tower sewage treatment equipment field, concretely relates to a saturated tower blowdown pipeline. BACKGROUND

[0002] Saturated tower has been used in shift section for many years, and its function is to recover latent heat of steam, the saturated tower tank top is equipped with saturated crude synthesis gas outlet, the tank bottom is equipped with cold process water outlet, the upper portion of tank side wall is equipped with hot process water inlet, the lower portion of tank side wall is equipped with crude synthesis gas inlet, and its process flow is that crude synthesis gas from gasification first enters the lower portion of saturated tower, hot process water from hot water tower is uniformly sprayed by spray head from the upper portion of saturated tower, the middle portion of tower is equipped with filler, hot process water flowing downwards and crude synthesis gas flowing upwards counterflow contact in filler layer, and heat and mass exchange transmission are carried out, under normal production state, saturated tower can produce about 10 tons of wastewater per hour, and this part of wastewater needs to be sent to sewage treatment pool, because saturated tower sewage temperature is higher, so saturated tower sewage can be preheated by plate heat exchanger, but it is found in actual production operation process that the temperature after plate heat exchanger heat exchange is about 100 DEG C, the temperature of out-of-bound zone is about 70 DEG C, and the temperature is still higher, which has certain influence on cultivation of nitrifying bacteria in sewage treatment pool water, and is not conducive to efficient realization of subsequent sewage treatment process, and moreover, sewage directly entering plate heat exchanger is easy to block flow channel, and is not conducive to long-term stable operation of plate heat exchanger. CONTENT OF UTILITY MODEL

[0003] In view of the problems in the background art, the utility model aims at providing a saturated tower blowdown pipeline, which effectively solves the problems in the background art.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] The saturated tower blowdown pipeline comprises a main pipeline and, sequentially arranged on the main pipeline from upstream to downstream, a front-end filter heat exchanger, a plate heat exchanger and a sewage treatment tank; the front-end filter heat exchanger comprises a shell and a plurality of heat absorption layers arranged in the shell in the vertical direction, the heat absorption layers comprise a plurality of hollow plate bodies in inverted V shape arranged in the horizontal direction, and the hollow plate bodies of adjacent two heat absorption layers are staggered; the shell is further provided with a sewage inlet, a sewage outlet, an impurity flow outlet, a water replenishing port, a water distribution tank and a water collection tank, the sewage inlet and the sewage outlet are both higher than the uppermost heat absorption layer and connected with the main pipeline; the impurity flow outlet is provided with a discharge pipe, the discharge pipe is provided with a blowdown valve and a blowdown pump, and the downstream end of the discharge pipe is connected with the sewage treatment tank; the two ends of the hollow plate body are connected with the water distribution tank and the water collection tank respectively, the water distribution tank is provided with a circulating water inlet, the water collection tank is provided with a circulating water outlet, a water replenishing pipe is arranged between the circulating water inlet and the water replenishing port, and the water replenishing pipe is provided with a water replenishing valve, a water replenishing pump and a one-way valve.

[0006] Further, the shell is further provided with a horizontal grid layer between the uppermost heat absorption layer and the sewage inlet.

[0007] Further, the water replenishing port is located on the top surface of the shell.

[0008] Further, the blowdown pump is a peristaltic pump.

[0009] Further, the number of the front-end filter heat exchanger is at least one.

[0010] The utility model has the advantages of the following beneficial effects:

[0011] In the utility model, the front-end filter heat exchanger is used to reduce the temperature of sewage entering the plate heat exchanger, reduce the heat exchange load of the plate heat exchanger, avoid abnormal temperature rise of the subsequent sewage treatment tank, and be beneficial to the cultivation of nitrifying bacteria in the sewage treatment tank; in addition, the front-end filter heat exchanger can also realize rough filtration and deposition of sewage, and the accumulated impurities can be directly discharged into the sewage treatment tank periodically, which effectively reduces the occurrence of the plate heat exchanger blockage problem; the application has novel design, stable work, and is suitable for popularization and use. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a whole structure schematic view of the utility model embodiment;

[0013] Figure 2 It is a structure schematic view of the front-end filter heat exchanger in the utility model embodiment. DETAILED DESCRIPTION

[0014] The embodiments of the present application will be further described below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0015] In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more than two; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation and be operated, therefore, it cannot be understood as a limitation on the present application. In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0016] As shown in Figure 1 and Figure 2 The saturated tower blowdown pipeline described in the present embodiment comprises a main pipeline 1 and a front-end filter heat exchanger 2, a plate heat exchanger 3 and a sewage treatment tank 4 arranged on the main pipeline in turn from upstream to downstream; the number of front-end filter heat exchangers 2 is at least one, and the front-end filter heat exchanger 2 comprises a shell 5 and a plurality of heat absorption layers arranged in the shell 5 in the vertical direction, the heat absorption layer comprises a plurality of hollow plate bodies 6 in inverted V shape distributed uniformly in the horizontal direction, and the hollow plate bodies 6 of adjacent two heat absorption layers are staggered, preferably the left and right sides of the hollow plate bodies 6 of the lower heat absorption layer are located in the vertical projection area of the hollow plate bodies 6 of the upper heat absorption layer adjacent thereto, which can effectively prevent the lower particle impurities from passing through each heat absorption layer to reach the upper part of the inner cavity of the shell 5;

[0017] The shell 5 is further provided with a sewage inlet 7, a sewage outlet 8, a waste flow outlet 9, a water supplement inlet 10, a water distribution tank 11 and a water collection tank. The sewage inlet 7 and the sewage outlet 8 are both higher than the uppermost heat absorption layer and are connected with the main pipeline 1. The waste flow outlet 9 is provided with a discharge pipe 12, the discharge pipe 12 is provided with a sewage valve 13 and a sewage pump 14, the sewage pump 14 is a peristaltic pump, and the downstream end of the discharge pipe 12 is connected with the sewage treatment tank 4. The water supplement inlet 10 is located on the top surface of the shell 5. The two ends of the hollow plate body 6 are respectively connected with the water distribution tank 11 and the water collection tank. The water distribution tank 11 is arranged on the rear side of the shell 5 and is provided with a circulating water inlet 15. The water collection tank is arranged on the front side of the shell 5 and is provided with a circulating water outlet. A water supplement pipe 16 is arranged between the circulating water inlet 15 and the water supplement inlet 10. The water supplement pipe 16 is provided with a water supplement valve 17, a water supplement pump 18 and a one-way valve.

[0018] The shell 5 is further provided with a horizontal grid layer 19, which is located between the uppermost heat absorption layer and the sewage inlet 7. The horizontal grid layer 19 includes a plurality of horizontal rods parallel to each other and uniformly distributed in the horizontal direction. The horizontal grid layer 19 can reduce the impact force of the water flow on the heat exchange layer.

[0019] The working principle of the embodiment is as follows:

[0020] After the saturated tower 20 discharges the sewage, the sewage enters the shell 5 through the sewage inlet 7. The cross-sectional area of the flow channel increases, the flow rate of the sewage slows down, and part of the particulate impurities descend through each heat exchange layer and are not easy to return. While the sewage flows in the shell 5, the circulating water flowing in the hollow plate body 6 exchanges heat through the partition wall. The heated circulating water is used as process water. The cooled sewage flows into the next front-end filter heat exchanger 2 or plate heat exchanger 3 through the sewage outlet 8. Finally, after the heat exchange in the plate heat exchanger 3 is completed, the sewage is sent to the sewage treatment tank 4.

[0021] After a certain period of operation, the sewage valve 13, the sewage pump 14, the water supplement valve 17 and the water supplement pump 18 are opened. The particulate impurities accumulated in the shell 5 are directly sent to the sewage treatment tank 4 by the sewage pump 14. The water supplement pump 18 supplements the circulating water into the shell 5 to maintain the flow downstream of the main pipeline 1. Compared with the prior art, the front-end filter heat exchanger 2 in the embodiment reduces the temperature of the sewage entering the plate heat exchanger 3 in advance, reduces the heat exchange load of the plate heat exchanger 3, avoids the abnormal temperature rise of the subsequent sewage treatment tank 4, and is beneficial to the cultivation of nitrifying bacteria in the sewage treatment tank 4. In addition, the front-end filter heat exchanger 2 also realizes the coarse filtration and sedimentation of the sewage. The accumulated impurities can be directly discharged into the sewage treatment tank 4 at regular intervals, which effectively reduces the occurrence of the blockage problem of the plate heat exchanger 3.

[0022] The embodiments of the present application are presented for purposes of illustration and description, and are not intended to be exhaustive or to limit the application to the precise form disclosed. Many modifications and variations are possible in light of the above teachings. It is intended that the embodiments be limited only by the claims. A specialized consideration and description of the embodiments are presented in order to provide a thorough and enabling disclosure of the present application, and to provide those skilled in the art with a complete patentable specification and concept of the application so that they can design and use various embodiments having various modifications in accordance with the principles of the application.

Claims

1. A saturation tower sewage discharge pipeline, characterized in that, The system includes a main pipeline and, sequentially arranged from upstream to downstream, a front-end filter heat exchanger, a plate heat exchanger, and a wastewater treatment tank. The front-end filter heat exchanger includes a shell and multiple heat-absorbing layers arranged vertically within the shell. Each heat-absorbing layer comprises multiple inverted V-shaped hollow plates evenly distributed horizontally, with the hollow plates of adjacent heat-absorbing layers staggered. The shell also includes a wastewater inlet, a wastewater outlet, a sludge outlet, a water supply inlet, a water distribution tank, and a water collection tank. The wastewater inlet and outlet are both higher than the uppermost heat-absorbing layer and connected to the main pipeline. The sludge outlet is equipped with a discharge pipe, a drain valve, and a drain pump, with the downstream end of the discharge pipe connected to the wastewater treatment tank. The two ends of each hollow plate are connected to the water distribution tank and the water collection tank, respectively. The water distribution tank has a circulating water inlet, and the water collection tank has a circulating water outlet. A water supply pipe is installed between the circulating water inlet and the water supply inlet, and the water supply pipe is equipped with a water supply valve, a water supply pump, and a check valve.

2. The saturation tower sewage discharge pipeline according to claim 1, characterized in that, The shell also contains a horizontal grid layer, which is located between the uppermost heat-absorbing layer and the sewage inlet.

3. The saturation tower sewage discharge pipeline according to claim 1, characterized in that, The water inlet is located on the top surface of the shell.

4. The saturation tower sewage discharge pipeline according to claim 1, characterized in that, The sewage pump is a peristaltic pump.

5. The saturation tower drain line according to any one of claims 1-4, characterized in that, The number of the front-end filter heat exchangers is at least one.

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