DD239846A1 - INSTALLATION FOR THE RECYCLING OF COSMETIC AND OTHER WASTE WATER THROUGH A HEAT TRANSFER TUBE, USING THE NATURAL TANK - Google Patents

Abstract

The plant is used for the recovery of heat from municipal and other waste water via a heat transfer pipe using the natural Gefaelles. The obtained heat in the low temperature range is supplied via a heat pump cycle heating purposes or use hot water preparation. A good heat-conducting jacket pipe is pushed over a pipeline through which wastewater flows. Between the sewer pipe and the jacket pipe flows in countercurrent a heat transfer circuit via a heat pump. The heat transfer tube is determined in its nominal size and length according to the required heat output. The heat content of the wastewater depends on the intensity and continuous performance of the wastewater stream. The correspondingly calculated heat transfer pipe is installed between two sewer shafts. The sewage pipes lock the beginning and the end of the heat transfer section and at the same time control the function of the system. At the beginning and at the end of the heat transfer conveyor section, the heat carrier circuit is connected as a supply and return line to the heat pump.

Description

Fig. 1 Longitudinal section of a plant for heat recovery from municipal wastewater Fig. 2 Detail A - to the heat exchanger tube, connection and pipe connection Fig. 3 Detail B - Distance storage at the heat exchanger tube.

Shown is a heat exchanger tube with a heat output of about 40 KW.

A heat exchanger pipe 1 ₍ consisting of stainless steel pipe NW200 (219 x 10mm) is laid parallel to the sewage collector between two inspection shafts 2. The heat exchanger pipe 1 is coated with a jacket pipe 3 made of GG screw-on flange pressure pipe NW250 , two T-pieces4T250 / 8Ö and a fitting piece 5 FF 250 x 400. At both outlets of the T-pieces 4, the two pipes 7 forward and return are welded as a heat carrier line to the heat pump via a blind flange 6. The ends of the two T Pieces 4 are to be covered with a blind flange 8. In the blind flanges 8, a recess corresponding to the outside diameter of the heat exchanger tube 1 is to be provided and thus centered on the heat exchanger tube 1. A rolling rubber 9 is inserted between the blind flanges 8. This squeal seal 9 closes the annular gap between heat exchanger tube 1 and mant elrohr 3 watertight For the flange connection 8, galvanized screws and nuts are used. All pipelines are laid in a sand bed. The steel tubes 7 to the heat pump as heat transfer circuit are isolated with Sys-Pur half shells. To protect against moisture damage, the entire insulation is wrapped twice with Bitumenbinden. In the tubes 7 of the closed heat transfer circuit is neutral water. To achieve a high degree of heat transfer between the heat exchanger tube 1 and the jacket tube 3, a certain water velocity to the heat exchanger circuit is required. The uniform gap distances between heat exchanger tube 1 and jacket tube 3 is done by inserting spacers. To ensure corrosion resistance, use material of the same alloy. The heat transfer system produced in this way is laid in the soil at the same level and parallel to the sewage collector. The two inspection shafts 2 at the same time represent the limit of the heat exchanger section. In the structural masonry of the inspection shafts 2, the heat exchanger tube is integrated as well as the drainage channel of the sewer. The inflow and outflow connection to the sewage collector is made via a stoneware pipe NH 200. The connection to the main collector takes place at the inspection shaft 2. In order to ensure the waste water flow in the shunt, the connection is made at an acute angle to the outflow direction. The integration of the secondary closing line takes place over the wastewater bottom of the main collector.

Claims (4)

Invention claim: 1. Plant for heat recovery from municipal and other wastewater through a heat exchanger tube taking advantage of the natural gradient, characterized in that of waste water flowing through heat transfer tube (1) by a jacket tube (3) and centered by spacers (9), by two T Pieces (4) a connection of the tubes (7) takes place to the heat exchanger circuit and a limitation of the Übertragerstrecke by two sewer control shafts (2) is made. 2. Plant according to item 1, characterized in that locally limited wastewater attack the heat exchanger tube (1) is installed directly into the sewer line. 3. Plant according to item 1, characterized in that the connection of the sewer dividing section of the main collector to the heat exchanger tube (1) takes place at an acute angle. 4. Plant according to item 1, characterized in that the length and dimension of the heat exchanger tube (1) depends on the heat to be removed and the heat content of the average amount of wastewater in the sewage collector. ' "' For this 3 pages drawings Field of application of the invention The plant is used for heat recovery from municipal wastewater preferably in the urban area in mixed and Trennsysthemen with continuous wastewater incidence via a downstream heat pump. The heat obtained in the low-temperature range via a heat transfer circuit with a downstream heat pump is used for low-temperature heating or domestic hot water production. ^v , The use is possible wherever municipal wastewater from residential and industrial buildings, including agriculture arise. Characteristic of the known technical solutions It is known that two liquid streams in the opposite direction through a jacket tube passed the heat exchange with each other. This is all the more effective the more effective the heat conductor between the two media is. So far, the heat-transmitting medium has been transported with mechanical promotion; z. B. sewage lifting or dirty water pump. Depending on the amount of dirty water, this transport requires a relatively high amount of energy. These systems have the disadvantage that the energy gained is reduced by the additional mechanical energy required. This results in a much lower efficiency, compared to the energy obtained with their full use, out. Also, buildings are needed for the accommodation of the conveyor systems, which are invest- and maintenance-consuming. Object of the invention The aim of the invention is to replace the lack of heat in the economy by alternative heat sources in the field of energy to attack. With the development of on-site energy, large transport routes are saved at the same time and the use of fossil fuels counteracts environmental pollution. Explanation of the essence of the invention The invention is based on the object that at a certain distance of the sewage collector a parallel section of a heat exchanger tube is erected to a previously determinable length with a certain diameter. According to the invention, this route is limited by inspection shafts for wastewater at the beginning and at the end and designed so that a subset of the wastewater is passed through the parallel guided heat exchanger tube with natural discharge gradient. This subset is derived from main collectors with high effluents. A jacket is pushed around the heat transfer tube through which the wastewater flows, through which the heat source circuit of the heat pump is led. To achieve high efficiency, a heat-binding and corrosion-resistant material with a long service life is used. The heat exchanger tube begins and ends in the masonry of the respective 'inspection shaft. The connection of the sewer pipe in front of the heat exchanger pipe is made by a sewer pipe at an acute angle. In order to avoid floating boulders in large wastewater profiles in the heat transfer line, a deflector is to be arranged in the main collector. The heavy boulders at the bottom are counteracted by an integration above the seepage. Through a determinable quantity flow at temperatures of the municipal sewage in the range between 9-14 "C the heat reserves, which are opened in the range of the starting energy, become. embodiment In the drawings, a plant for heat recovery from municipal wastewater via a parallel to the sewage collector switched heat exchanger tube is shown.